JPH11216712A - Manufacturing device for extrusion moldings - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable manufacturing of extrusion moldings whose dimensional accuracy is upgraded. SOLUTION: This manufacturing device for extrusion moldings is equipped with speed adjusting means 6A, 6B for adjusting the speed of a molding material Mr to be flowed into an extrusion mold 2 and speed measuring means 9A, 9C for measuring the speed of the molding material Mr to be flowed into the extrusion mold 2, installed at specified positions in the extrusion mold 2, and draws out extrusion moldings P in succession. In this case, the speed adjusting means 9A, 9B are controlled so that the measurement value of the speed measuring means 9A, 9C are at a specified constant level.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for manufacturing an extruded product, and more particularly to an apparatus for manufacturing an extruded product capable of manufacturing an extruded product with improved dimensional accuracy.

[0002]

2. Description of the Related Art An extruded product formed into a predetermined shape by extruding an inorganic material such as a cement material or a resin material (hereinafter referred to as a "molding material") is, for example, a building material. It is widely used as an outer wall material, partition material, roof material, panel material for roads and the like.

[0003] Such an extruded product is required to have no thick or thin portions, to be uniform, to have excellent dimensional accuracy, and to be free from warpage. FIG. 10 is a configuration diagram schematically showing an extruded product manufacturing apparatus which has already been developed to solve such a problem.
FIG. 10 is a cross-sectional view schematically showing a state in which the apparatus for manufacturing an extruded product is viewed from the side, and FIG.
FIG. 3 is a schematic cross-sectional view taken along line XX shown in FIG.

The extruded product manufacturing apparatus 101 is formed into an extrusion die 102, an extruder 103 for extruding a molding material into the extrusion die 102, and flowing into the extrusion die 102 to form a predetermined shape. A drawing means 104 such as a belt conveyor for drawing out an extruded product extruded from the extrusion die 102 is provided. If the extrusion speed of the molding material Mr sent out into the mold 102 is uneven, the extrusion speed of the molding material Mr flowing into the mold 102 is also uneven.
3 is a molding material M of a constant amount / time which is as stable as possible.
r is sent out to the mold 102.

[0005] The extrusion die 102 is provided with a die approach 102 in order from the side to which the tip of the extruder 103 is connected.
a, a die land 102b and a die 102c, and the sectional shape and the sectional area of the molding material Mr are gradually changed by the die approach 102a.
2b, the molding material Mr is made to flow substantially in parallel, and the molding material Mr is
A die 102 having a predetermined cross-sectional shape and
It is to be pushed out from.

An extruded product P extruded from a mold 102
Is pulled out to a predetermined place by the drawer 104. By the way, the extruded product P immediately after being extruded from the mold 102 is soft, and if there is a difference between the speed of the extruded product P extruded from the mold 102 and the withdrawal speed of the extracting means 104, the extruded product P is extruded. The product P has a dimensional variation. For this reason, generally, a speed measuring means 105 for measuring the speed of the extruded product P extruded from the mold 102 is provided downstream (downstream) of the exit of the mold 102,
To prevent a difference between the speed of the extruded product P extruded from the mold 102 and the speed of the pulling means 104, the pulling speed of the pulling means 104 is synchronized with the measured value of the speed measuring means 105. I try to make it.

[0007] The extruded product P drawn out to a predetermined place by the drawing means 104 is thereafter cut into a predetermined length, and further processed into a final product through a curing step and the like. By the way, even if the extrusion speed of the molding material Mr into the mold 102 of the extruder 103 is set to a stable and constant value as much as possible, or the die 102 is provided with the die approach 102a, When the molding material Mr flowing through the mold 102 has a high-speed portion and a low-speed portion, and the molding material Mr flowing in the mold 102 has a high-speed portion and a low-speed portion, the molding material Mr has The expansion amount and the like of the molding material Mr differ depending on the portion where the molding material Mr is large and the portion where the molding material Mr is small.

In order to solve such a problem, the apparatus 101 for manufacturing an extruded product further includes speed adjusting means 106A, 106A on each of the upper surface and the lower surface in the mold 102.
06B is provided, and speed adjusting means 107 and 108 are provided on each of a pair of side surfaces arranged opposite to each other in the mold 102. Speed adjusting means 106A, 106B, 107,
More specifically, the speed adjusting means 106A, 106B, 107, and 108 are choke means, and the speed adjusting means 106A is provided on the upper surface of the mold 102 so as to be able to protrude and retract. Means 106B
Is provided on the lower surface of the mold 102 so as to be able to protrude and retract, and the speed adjusting means 107 is provided so as to be able to protrude and retract on one of a pair of side surfaces of the mold 102 which are opposed to each other.
Reference numeral 08 is provided on the other of the pair of side surfaces of the mold 102 facing each other so as to be able to protrude and retract.

The apparatus 101 further includes a mold 1
A speed measuring means 109 is provided above the extruded product P extruded from the mold 102 at a stage subsequent to the outlet of No. 02 and a pair of side surfaces of the extruded product P extruded from the mold 102 are opposed to each other. Each has a speed measuring means 110,
111 are provided. In this device 101, the measured value V1 of the speed measuring means 110 and the speed measuring means 1
11 and the measured extrusion speed ratio D (V3 / V
1) The measured extrusion speed ratio D (V1 / V) between the measured value V1 of the speed measuring means 110 and the measured value V2 of the speed measuring means 109
2) and a measured extrusion speed ratio D (V3) between the measured value V2 of the speed measuring means 109 and the measured value V3 of the speed measuring means 111.
/ V2), and these are respectively set speed ratio Th (V
3 / V1), the set speed ratio Th (V1 / V2), and the set speed ratio Th (V3 / V2).
6A, 106B, 107 and 108 are controlled.

[0010] Speed adjusting means 106A, 106B, 10
7 and 108 will be described in more detail. For example, the measured extrusion speed ratio D (V3 / V1)> set speed ratio T
h (V3 / V1), measured extrusion speed ratio D (V1 / V2) =
If the relationship of the set speed ratio Th (V1 / V2) and the measured extrusion speed ratio D (V3 / V2)> set speed ratio Th (V3 / V2) is satisfied, the speed adjusting means 107 is pulled out from the extrusion mold 102, The operation of pushing the speed adjusting means 108 into the extrusion mold 102 is performed to increase the extrusion speed of the measurement part of the speed measurement means 110 and to reduce the extrusion speed of the measurement part of the speed measurement means 110, Ratio D (V3 / V
1) is set to the set speed ratio Th (V3 / V1), and the measured extrusion speed ratio D (V3 / V2) is set to the set speed ratio Th.
(V3 / V2).

In the apparatus 101, the speed adjusting means 106
Each of A, 106B, 107 and 108 allows the flow rate distribution of the molding material Mr flowing in the extrusion die 102 to be a predetermined flow rate distribution.
It is difficult to create high speed parts and low speed parts.
Attempts are made to solve the problem that the dimensional accuracy of the extruded product varies due to the difference in the amount of expansion.

[0012]

However, in the conventional apparatus 101 for manufacturing an extruded product, the extruded product P to be manufactured has portions having different dimensions due to the following reasons. There is a problem that this cannot be completely eliminated. First, first, the speed measuring means 109, the speed measuring means 110, and the speed measuring means 11
1 is provided after the exit of the mold 102, the molding material Mr, which has been compressed in the mold 102, is also measured by the speed measurement means 109, 110, 111. At the exit of the mold 102, the rate of volume expansion caused by release from the compression state is
The speed measuring unit 109, the speed measuring unit 110, and the speed measuring unit 111 also cannot accurately measure the speed of the extruded product P extruded from the mold 102 because the speed is superimposed on the speed of the extruded product P extruded from the mold 102. .

Secondly, the speed measuring means 109, the speed measuring means 110 and the speed measuring means 111 of the extruded product manufacturing apparatus 101 are all provided with an extruding speed of the extruded product P after being extruded from the mold 102. Therefore, the flow rate distribution of the molding material flowing in the mold 102 is set to a predetermined flow rate distribution unless an abnormality occurs in the speed of the extruded product P extruded from the mold 102. Can not do.

That is, in the manufacturing apparatus 101, the speed measuring means 109, the speed measuring means 110 and the speed measuring means 11
1 are extruded products P extruded from the mold 102.
After detecting that an abnormality has occurred in the velocity of the molding material Mr, the velocity of the molding material Mr flowing through the mold 102 is merely corrected to a predetermined velocity afterward. Already has portions with different dimensions. For this reason, there is a problem that it is not possible to completely eliminate the formation of portions having different dimensions in the extruded product P.

Third, in this apparatus 101,
Only one speed measuring means 109 is provided above the latter stage of the exit of the mold 102, and the velocity of the molding material Mr flowing through the mold 102 at each portion in the width direction within the mold 102. Is not sufficiently measured, and one speed adjusting means 106A, 106B is provided on each of the upper surface and the lower surface of the mold 102, and the measured extrusion speed ratio D (V3 / V1 ), Measured extrusion speed ratio D (V1 / V
2) Since the speed adjusting means 106A and 106B are only controlled synchronously based on the measured extrusion speed ratio D (V3 / V2), the flow in the width direction in the mold 102 is controlled. There is also a problem that it is not possible to control each fine region in the width direction in the mold 102 based on the degree distribution.

Not only that, but fourth, the device 101
Then, the speed measuring means 109 is provided above the latter stage of the exit of the mold 102, and the speed measuring means 110 and the speed measuring means 1 are provided.
11 is merely provided on each of a pair of side surfaces disposed opposite to each other after the exit of the mold 102, and the mold 102
Is not provided below the outlet of the mold 102, and the speed of extrusion from the mold 102 differs between the upper surface and the lower surface of the extruded product P extruded from the mold 102 at the stage subsequent to the outlet of the mold 102. In such a case, there is a problem that it is not possible to cope with the warp generated in the extruded product P.

Fifth, when the speed measuring means 105 is provided downstream of the exit of the mold 102, the speed measuring means 1
The measured value of 05 indicates that the rate at which the molding material Mr, which has been in the compressed state in the mold 102, is released from the compressed state at the outlet of the mold 102, expands the volume, and The speed of the extruded product P extruded from the mold 102 cannot be accurately measured because it is superimposed on the speed of the extruded product P extruded. For this reason, even if the drawing speed of the drawing means 104 is synchronized with the measured value of the speed measuring means 105, the measured value of the speed measuring means 105 is not the actual speed of the extruded product P extruded from the mold 102. Therefore, there is a difference between the speed of the extruded product P extruded from the mold 102 and the withdrawing speed of the extracting means 104, and as a result, the extruded product P has a dimensional variation.

The present invention has been made in order to solve the above-described problems. Instead of observing the speed of an extruded product extruded from a mold at a stage subsequent to the exit of the mold, the present invention has been made.
The speed and / or speed of the molding material flowing into the mold is measured on the side close to the extruder of the mold, and at an early stage, the speed of the molding material flowing into the mold is adjusted to a predetermined speed and / or speed distribution. The present invention provides an extruded product manufacturing apparatus capable of producing an extruded product that is uniform, has excellent dimensional accuracy, is free from warpage, and has no thick or thin portions. It is intended to be.

[0019]

According to a first aspect of the present invention, there is provided an apparatus for manufacturing an extruded product, wherein a molding material is flowed into an extrusion die, and the extruded product formed into a predetermined shape is formed by the extrusion die. By the drawing means, so as to be continuously drawn, in an extruded product manufacturing apparatus, at a predetermined position in the extrusion die,
In the step of providing a speed adjusting means for adjusting the speed of the molding material flowing into the extrusion die, and a speed measuring means for measuring the speed of the molding material flowing in the extrusion die, in the step of continuously drawing the extruded product The speed adjusting means is controlled so that the value measured by the speed measuring means becomes a predetermined constant speed.

In this apparatus for manufacturing an extruded product, a speed measuring means is provided in the mold, and the speed of the molding material flowing into the mold is measured by the speed measuring means. The speed adjusting means is controlled so as to have a predetermined constant value, and an extruded product is manufactured. Thereby, before the molding material becomes an extruded product, it is possible to set the speed of the molding material flowing into the mold in advance to a predetermined constant speed. A speed measuring means is provided at a stage subsequent to the outlet, and the speed of the extruded product extruded from the mold is measured, and after the extruded product has already been manufactured, the molding material flowing into the mold after the fact is manufactured. Compared with a conventional extruded product manufacturing apparatus that controls to a predetermined constant value, it is difficult to form portions having different dimensions in the manufactured extruded product.

In the case where the speed measuring means is provided in the mold, when the speed measuring means provided after the outlet of the mold is provided, the molding material is included in the measured value at the outlet of the mold. Since there is no problem that the speed of expansion of the volume caused by releasing from the compressed state is superimposed on the speed of the extruded product extruded from the mold, the speed measuring means can more accurately measure the speed in the mold. The speed of the molding material flowing into the container can be measured.

In this extruded product manufacturing apparatus, an extruded product can be manufactured by accurately measuring the speed of the molding material flowing into the mold, so that a speed measuring means is provided downstream of the exit of the mold. Compared with a conventional extruded product manufacturing apparatus that measures the speed of an extruded product extruded from a mold and manufactures the extruded product, it is difficult to form a part having different dimensions in the manufactured extruded product.

The speed measuring means may be provided before or after the speed adjusting means as long as it is provided in the mold. However, the speed measuring means is provided after the speed adjusting means. Based on the measured value measured, if the speed adjusting means feedback-adjusted so that the measured value of the speed measuring means provided at the subsequent stage of the speed adjusting means becomes a predetermined value,
Since the molding material whose speed has not been adjusted is to be sent to the rear of the mold, the speed adjusting unit is provided at a stage preceding the speed adjusting unit, and based on the measurement value measured by the speed measuring unit, the speed adjusting unit is provided. It is more preferable to perform predictive control by a predetermined control method.

According to a second aspect of the present invention, there is provided an apparatus for manufacturing an extruded product which proposes such predictive control. It was provided before the speed adjusting means in the mold. By the way, in order to automatically perform predictive control, test data is collected in advance, and the speed adjusting means is controlled by a predetermined control method based on a measurement value measured by a speed measuring means provided in a stage preceding the speed adjusting means. A control table for controlling is required.

According to a third aspect of the present invention, there is provided an apparatus for manufacturing an extruded product, wherein such a control table is easily created, and based on the measured value measured by the speed measuring means based on the control table, the speed adjusting means is controlled by the speed adjusting means. An apparatus for manufacturing an extruded product, which is capable of automatically optimizing an adjustment amount, is proposed. In the apparatus for manufacturing an extruded product according to claim 2,
A measured value of the speed measuring means provided in the preceding stage of the speed adjusting means,
A control table showing the correlation with the adjustment amount of the speed adjusting means is prepared, and in the step of continuously drawing out the extruded product, the speed measuring means provided in the extrusion die in front of the speed adjusting means in the extrusion die Measure the speed of the molding material flowing into the mold, comparing the measured value of the speed measuring means provided in the extrusion die in the preceding stage of the speed adjusting means, and a control table stored in the control means. , Wherein the speed adjusting means is automatically controlled.

The "control table showing the correlation between the measured value of the speed measuring means provided before the speed adjusting means and the adjustment amount of the speed adjusting means" is provided at the subsequent stage of the speed adjusting means in the extrusion die. Further, a speed measuring means for measuring the speed of the molding material flowing into the extrusion die is further provided, and a test under the same conditions as in the step of continuously drawing the extruded product is performed in advance. The speed of the molding material flowing into the mold is measured by the provided speed measuring means, and the measured value of the speed measuring means provided in the preceding stage of the speed adjusting means is flowed to the mold of the molding material flowing into the mold. When the speed is different from the target speed of the molding material, from this point on, the speed adjusting means is changed from the speed measuring means provided at the subsequent stage of the speed adjusting means in the extrusion die to the measured value of the molding material flowing into the mold. Target speed of molding material flowing into mold And the measured value of the speed measuring means provided at the subsequent stage of the speed adjusting means in the extrusion mold became the target speed of the molding material flowing into the mold of the molding material flowing into the mold. The adjustment amount of the speed adjustment means at the time
Corresponding to the measurement value of the speed measurement means provided in the former stage of the speed adjustment means in the extrusion die, the measurement value of the speed measurement means provided in the preceding stage of the speed adjustment means, the adjustment amount of the speed adjustment means and By examining the correlation of

The control table is stored in the control means in advance, and in the step of continuously drawing out the extruded product, the speed measuring means provided in the preceding stage of the speed adjusting means in the extrusion die is used to store the control table in the die. The speed of the flowing molding material is measured, and the measured value of the speed measuring means provided in the former stage of the speed adjusting means in the extrusion die is compared with a control table stored in the control means. Control automatically.

When feedback control of the speed adjusting means is performed based on the measured value of the speed measuring means provided at the subsequent stage of the speed adjusting means, the measured value of the speed measuring means is determined by the speed of the molding material flowing into the mold. Since the speed adjusting means starts the adjusting operation from the time when it is determined that the speed is different from the molding material, the molding material already at the measurement site of the speed measuring means is
Since the material is flowed to the rear side of the mold without adjusting the speed, the dimensional accuracy of the molded product to be manufactured is reduced due to this. .

On the other hand, in this extruded product manufacturing apparatus, the measured value of the speed measuring means provided before the speed adjusting means in the mold differs from the speed of the molding material flowing into the mold. The speed adjusting means starts the adjusting operation from the point in time when it is determined that there is an error. For this reason, the speed of the molding material flowing into the mold is set to a predetermined speed earlier than in the case where the speed adjusting unit is feedback-controlled based on the measurement value of the speed measuring unit provided at the subsequent stage of the speed adjusting unit. Therefore, the dimensional accuracy of the molded article to be manufactured is improved as compared with the case where the speed adjusting unit is feedback-controlled based on the measurement value of the speed measuring unit provided at the subsequent stage of the speed adjusting unit.

Further, the control of the speed adjusting means is started based on the measurement value measured by the speed measuring means provided before the speed adjusting means, and the speed measuring means provided after the speed adjusting means is controlled by a predetermined constant. Even if the prediction control is performed so as to be a value, based on the measurement value measured by the speed measurement unit provided at the subsequent stage of the speed adjustment unit, the measured value of the speed measurement unit provided at the subsequent stage of the speed adjustment unit is based on the measurement value. It is possible to prevent the molding material whose speed has not been adjusted from being sent to the rear of the mold, as compared with the case where the feedback adjustment is performed so as to be a predetermined value.

An apparatus for manufacturing an extruded product according to a fourth aspect of the present invention proposes such an apparatus for manufacturing an extruded product, in which a molding material is flowed into an extrusion die, and a predetermined shape is formed by the extrusion die. In an extruded product manufacturing apparatus in which an extruded product molded into a shape is continuously drawn out by a drawing means, the speed of a molding material flowing into the extrusion die at a predetermined position in the extrusion die is set. Is provided, speed measurement means for measuring the speed of the molding material flowing into the extrusion die is provided in front of the speed adjustment means in the extrusion die, and the speed adjustment means in the extrusion die is provided. In the subsequent stage, a speed measuring means for measuring the speed of the molding material flowing into the extrusion mold is provided, and in the step of continuously drawing out the extruded product, based on the measurement value of the speed measuring means provided in the preceding stage of the speed adjusting means. After the speed adjustment means As measured value of the velocity measuring means eclipsed becomes a predetermined speed, and adjusting the speed adjusting means.

Further, the control of the speed adjusting means is started based on the measurement value measured by the speed measuring means provided before the speed adjusting means in the mold, and the speed measuring means provided after the speed adjusting means is provided. In the case where the predictive control is performed so as to be a predetermined constant value, the speed measuring means provided after the speed adjusting means may be provided after the exit of the mold. An apparatus for manufacturing an extruded product according to claim 5 proposes such an apparatus for manufacturing an extruded product, in which a molding material is flowed into an extrusion die, and is formed into a predetermined shape by the extrusion die. In an apparatus for manufacturing an extruded product in which the extruded product is continuously drawn by a drawing means, the speed of a molding material flowing into the extrusion die is adjusted to a predetermined position in the extrusion die. A speed adjusting means is provided, a speed measuring means for measuring the speed of the molding material flowing into the extrusion die is provided in front of the speed adjusting means in the extrusion die, and the extrusion die is provided after the outlet of the extrusion die. Speed measuring means for measuring the speed of the extruded product to be extruded, and in the step of continuously drawing out the extruded product, adjusting the speed based on the measurement value of the speed measuring means provided in the preceding stage of the speed adjusting means. Speed measurement provided after the means As the measured value of the stage becomes the predetermined speed, and adjusting the speed adjusting means.

According to a sixth aspect of the present invention, there is provided an apparatus for manufacturing an extruded product which does not warp the extruded product to be manufactured. In an extruded product manufacturing apparatus, an extruded product formed into a predetermined shape by an extrusion die is continuously drawn by the drawing means. A first speed adjusting means for adjusting the speed of the molding material flowing into the extrusion die is provided at the position, and the speed of the molding material flowing into the extrusion die is set at a predetermined position on the lower surface in the extrusion die. Providing a second speed adjusting means for adjusting;
A first speed measuring means for measuring a speed of a molding material flowing into the extrusion die is provided in a stage preceding the first speed adjusting means in the extrusion die, and the first speed adjustment in the extrusion die is provided. A second speed measuring means for measuring the speed of the molding material flowing into the extrusion die is provided at a stage subsequent to the means, and the second speed measuring means is provided in the extrusion die before the second speed adjusting means. A third speed measuring means for measuring the speed of the molding material to be supplied, and a fourth speed for measuring the speed of the molding material flowing into the extrusion die after the second speed adjusting means in the extrusion die. In the step of providing the measuring means and continuously drawing out the extruded product,
The first speed adjusting means is adjusted based on the measured value of the first speed measuring means so that both the measured value of the speed measuring means and the measured value of the fourth speed measuring means have the same predetermined value. And adjusting the second speed adjusting means based on the measurement value of the third speed measuring means.

In the extrusion molded product manufacturing apparatus, in the step of continuously drawing out the extruded product, the value measured by the second speed measuring means provided on the upper surface of the extrusion die and the lower surface of the extrusion die are measured. The first speed adjusting means provided on the upper surface of the extrusion die and the lower surface of the extrusion die are provided such that both the measured values of the fourth speed measuring means provided at the first and second speed measuring means have the same predetermined value. Since the second speed adjusting means is adjusted, the speed of the molding material flowing on the upper surface and the lower surface in the extrusion die can be made the same, so that warpage of the manufactured extruded product occurs. hard.

According to a seventh aspect of the present invention, there is provided an apparatus for manufacturing an extruded product which does not warp the manufactured extruded product. In an extruded product manufacturing apparatus, an extruded product formed into a predetermined shape by an extrusion die is continuously drawn by a drawing means. Provided with first speed adjusting means for adjusting the speed of the molding material flowing into the extrusion die, and adjusting the speed of the molding material flowing into the extrusion die at a predetermined position on the lower surface in the extrusion die. A second speed adjusting means is provided, and a speed measuring means for measuring a speed of the molding material flowing into the extrusion die is provided in a stage preceding the first speed adjusting means in the extrusion die. Before the second speed adjusting means. A speed measuring means for measuring the speed of the molding material is provided, and in the step of continuously drawing out the extruded product, the measured value of the speed measuring means provided in the preceding stage of the first speed adjusting means and the speed of the second speed adjusting means are provided. The first speed adjusting means is controlled based on the measured value of the speed measuring means provided in the preceding stage of the first speed adjusting means so that the measured value of the speed measuring means provided in the preceding stage is the same as the predetermined value. And controlling the second speed adjusting means based on a measurement value of a speed measuring means provided before the second speed adjusting means.

In the apparatus for manufacturing an extruded product, in the step of continuously drawing out the extruded product, the value measured by the first speed measuring means provided on the upper surface of the extrusion die and the lower surface of the extrusion die are used. The first speed adjusting means provided on the upper surface of the extrusion die and the lower surface provided on the lower surface of the extrusion die so that the measured value of the third speed measuring means provided on the upper surface of the extrusion die is the same as the predetermined value. Since the second speed adjusting means is adjusted, the speed of the molding material flowing on the upper surface and the lower surface in the extrusion die can be made the same, so that warpage of the manufactured extruded product occurs. hard.

Further, in this extruded product manufacturing apparatus, the measured value of the speed measuring means provided before the first speed adjusting means and the measured value of the speed measuring means provided before the second speed adjusting means are provided. And the first speed adjusting means and the second speed adjusting means are predictively controlled based on the measured values of the speed measuring means provided at the subsequent stage of the first speed adjusting means and the second speed adjusting means. It is possible to prevent the molding material whose speed has not been adjusted from being sent out to the rear of the mold as compared with the case of performing feedback adjustment based on the measurement value of the speed measuring means provided at the subsequent stage of the speed adjusting means.

The amount of adjustment of the first speed adjusting means based on the value measured by the speed measuring means provided before the first speed adjusting means, and the speed provided before the second speed adjusting means. The amount of adjustment of the second speed adjusting means to be performed based on the measurement value of the measuring means is determined by repeating the same test as in the step of forming a molding material into an extruded product using this apparatus, and creating a relationship between them as a control table. Then, the process of converting the molding material into an extruded product can be automated based on the control table.

According to an eighth aspect of the present invention, there is provided an apparatus for manufacturing an extruded product, wherein a molding material is flowed into an extrusion die, and the extruded product formed into a predetermined shape by the extrusion die is continuously drawn by a drawing means. In the manufacturing apparatus of the extruded product, a plurality of speed adjusting means for adjusting the speed of the molding material flowing into the extrusion die is provided in a width direction of a predetermined position in the extrusion die, Before each of the plurality of speed adjusting means in the extrusion die, a plurality of speed measurement for measuring the speed of the molding material flowing into the extrusion die so as to correspond to each of the plurality of speed adjusting means. A plurality of means for measuring the speed of the molding material flowing into the extrusion mold, corresponding to each of the plurality of speed adjustment means, are provided after the plurality of speed adjustment means in the extrusion mold. Providing speed measurement means to continuously pull out extruded products In the above, a plurality of speed adjusting means provided based on each of the measured values of the plurality of speed measuring means, provided in front of the plurality of speed adjusting means so as to correspond to each of the plurality of speed adjusting means. In the subsequent stage, each of the plurality of speed adjusting means is adjusted so that each of the measured values of the plurality of speed measuring means provided to correspond to each of the plurality of speed adjusting means has a predetermined speed. It is characterized by doing so.

In this apparatus for manufacturing an extruded product, a plurality of speed adjusting means for adjusting the speed of the molding material flowing into the extrusion die are provided in the width direction at a predetermined position in the extrusion die. Before each of the plurality of speed adjusting means in the mold, a plurality of speed measuring means for measuring the speed of the molding material flowing into the extrusion die so as to correspond to each of the plurality of speed adjusting means. Provided.

When a plurality of speed adjusting means are provided in the width direction at a predetermined position in the extrusion die, the measured value of each of the plurality of speed adjusting means is integrated to form a mold flowing into the extrusion die. The velocity distribution of the material in the width direction of the mold can be measured. In this apparatus for manufacturing an extruded product, a velocity distribution of a molding material flowing in an extrusion mold in a width direction of the mold is measured, and a plurality of speed adjusting means are provided corresponding to the measured values of the plurality of speed measuring means. Is provided, by controlling each of the plurality of speed adjusting means based on each of the measurement values of the plurality of speed measuring means,
The speed distribution of the molding material flowing in the extrusion die in the width direction of the die can be a predetermined speed distribution.

In this extruded product manufacturing apparatus, the extruded product is manufactured from the molding material by setting the speed distribution in the width direction of the die of the molding material flowing in the extrusion die to a predetermined speed distribution. In addition, the dimensional accuracy of the manufactured product is improved. In the manufacturing apparatus for an extruded product according to the ninth aspect, the molding material is flowed into the extrusion die, and the extruded product formed into a predetermined shape by the extrusion die is continuously drawn out by the drawing means. In the apparatus for manufacturing an extruded product, a plurality of speed adjusting means for adjusting the speed of the molding material flowing into the extrusion die are provided in a width direction at a predetermined position in the extrusion die. A plurality of speed measuring means for measuring the speed of the molding material flowing into the extrusion die are provided at a stage preceding the plurality of speed adjusting means in each of the plurality of speed adjusting means so as to correspond to each of the plurality of speed adjusting means. In the step of continuously drawing out the molded article, each of the plurality of speed adjusting means is controlled based on each of the measured values of the plurality of speed measuring means, and each of the measured values of the plurality of speed measuring means is controlled. Are both set to the specified speed. To.

In this apparatus for manufacturing an extruded product, a plurality of speed measuring means corresponding to each of the plurality of speed adjusting means are provided in front of the plurality of speed adjusting means provided in the width direction of the mold. Since each of the plurality of speed adjustment units is provided for predictive control based on the measured values of the plurality of speed measurement units, each of the plurality of speed adjustment units corresponding to each of the plurality of speed measurement units is provided. At the subsequent stage, corresponding to each of the plurality of speed adjustment means, provided with each of the plurality of speed measurement means,
Based on the measured values of the plurality of speed measuring means, based on the measured values of the plurality of speed adjusting means corresponding to each of the plurality of speed measuring means, the speed distribution is not adjusted as compared with the case where feedback adjustment is performed. Can be prevented from being sent to the rear of the mold.

Each of the plurality of speed adjusting means is adjusted based on the measured values of the plurality of speed measuring means provided in front of each of the plurality of speed adjusting means provided in the width direction of the mold. Using this device, the same test as in the process of extruding a molding material into an extruded product is repeated, and if these relationships are created as a control table, the molding material is extruded based on the control table. The process of making a product can be automated.

An apparatus for manufacturing an extruded product according to claim 10 specifically proposes a preferable means as a speed adjusting means of the apparatus for manufacturing an extruded product according to any one of claims 1 to 9. The speed adjusting means of the apparatus for manufacturing an extruded product according to any one of claims 1 to 9 is a choke means provided so as to be able to come and go in a mold. Molding material flowing into the mold, if there is a protruding part in the mold,
At that point, the speed slows down.

Accordingly, if the choke means is provided as a speed adjusting means so as to be able to come and go in the mold, the speed of the molding material flowing through the mold can be easily changed by the amount of projection of the choke means into the mold. it can. An apparatus for manufacturing an extruded product according to claim 11 specifically proposes a preferable means as a speed measuring means of the apparatus for manufacturing an extruded product according to any one of claims 1 to 10. Each of the speed measuring means of the apparatus for manufacturing an extruded product according to any one of (10) to (10) is provided on the inner surface of the mold at a predetermined interval in the direction in which the molding material flows in the mold. It is a pair of pressure gauges.

As a speed measuring means, a rotatably provided disk is brought into contact with a molding material flowing in a mold, and the rotational speed of the disk is used to determine the speed of the molding material at the position where the speed measuring means is provided. Even if it is a contact type that is designed to measure, or a measurement window is provided in the mold, a molding material flowing into the mold is irradiated with a laser beam from the measurement window, and the molding is flowed into the mold. From the reflected light reflected by the material, it may be a non-contact type that measures the speed of the molding material at the position where the speed measuring means is provided,
The measurement can also be performed by providing a pair of pressure gauges on the inner surface of the mold at predetermined intervals in the direction in which the molding material flows in the mold.

Since the pressure gauge is inexpensive, if a pressure gauge is employed as the speed measuring means, the manufacturing cost of the apparatus for manufacturing an extruded product can be reduced. An apparatus for manufacturing an extruded article according to claim 12 is the apparatus for manufacturing an extruded article according to any one of claims 1 to 11, wherein the speed of the molding material flowing in the mold near the outlet in the mold. Is provided, and in the step of continuously drawing the extruded product, the drawing speed of the drawing means is synchronized with the measurement value of the speed measuring means provided near the outlet in the mold. .

In the apparatus for manufacturing an extruded product, a speed measuring means is provided near the outlet in the mold, not at a stage subsequent to the outlet of the mold, and the drawing speed of the drawing means is synchronized with the measured value of the speed measuring means. Because of this, the phenomenon that the volume of the molding material expands when the molding material is released from the compressed state at the exit of the mold does not overlap the measurement value of the velocity measuring means.

Thus, the speed measuring means can accurately measure the speed of the extruded product extruded from the mold.
Since the drawing speed of the drawing means is also synchronized with the speed of the extruded product extruded from the mold, the difference between the drawing speed of the drawing means and the speed of the extruded product extruded from the mold causes an extruded product. No dimensional variation occurs.

[0051]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an apparatus for manufacturing an extruded product according to the present invention will be described in more detail with reference to the drawings. FIG. 1 is a configuration diagram schematically showing an apparatus for manufacturing an extruded product according to the present invention, and FIG. 1 (a) schematically shows a state in which the apparatus for manufacturing an extruded product according to the present invention is viewed in a lateral direction. FIG. 1B is a cross-sectional view schematically showing FIG.
It is a schematic plan view following a line.

The extruded product manufacturing apparatus 1 is formed into an extrusion mold 2, an extruder 3 for extruding a molding material into the extrusion mold 2, and flowing into the extrusion mold 2 to form a predetermined shape. A drawing means 4 such as a belt conveyor for drawing out an extruded product extruded from the extrusion die 2 is provided. If the extrusion speed of the molding material Mr sent out into the mold 2 is uneven, the extrusion speed of the molding material Mr flowing into the mold 2 is also uneven, so that the extruder 3 is as stable and constant as possible. The amount / time of the molding material Mr is sent to the mold 2.

The extrusion die 2 includes a die approach 2a, a die land 2b and a die 2c in order from the side to which the tip of the extruder 3 is connected, and the sectional shape and the sectional area of the molding material Mr are formed by the die approach 2a. Is gradually changed, and when the molding material Mr is flowed through the die land 2b,
The molding material Mr is made to flow substantially in parallel, and the die 2c
Thus, the molding material Mr has a predetermined cross-sectional shape, and is extruded from the extrusion die 2 as an extruded product P.

The above configuration is the same as that of the conventional extruded product manufacturing apparatus 101 shown in FIG. 10, but in this extruded product manufacturing apparatus 1, the following configuration is the same as the conventional extruded product manufacturing apparatus. It is significantly different from 101. At a predetermined position in the extrusion die 2, a speed adjusting means 6A, a speed adjusting means 6
B, speed adjusting means group 7 including speed adjusting means 7A, 7B, 7C, speed measuring means 5, speed measuring means 9A, 9B, 9
C, speed measuring means 10A, 10
B, 10C, and a speed measurement unit group 11 including speed measurement units 11A, 11B, 11C.

Speed adjusting means 6A, 6B, 7A, 7B, 7
Each of C is choke means, and speed adjusting means 6A
Is provided on the upper surface side of the mold 2 so as to be able to protrude and retract, and the speed adjusting means 6B is provided so as to be able to protrude and retract on the lower surface side of the mold 2. Also, speed adjusting means 7A, 7B, 7C
Are provided in a row on the lower surface side of the mold 2 and in the width direction of the mold 2 in this example.
It is provided on the lower surface side of the mold 2 so as to be able to appear and disappear.

The speed measuring means 5 is provided above the vicinity of the exit in the mold 2. FIG. 2 shows speed measuring means 5, speed measuring means 9A, 9B, 9C, speed measuring means 10A, 1
It is a figure explaining the reason why all 0B, 10C, 11A, 11B, and 11C were provided in the predetermined position in the metal mold | die 2. FIG. In FIG. 2, reference numeral 13 denotes speed adjusting means 6A, 6B, 7 for convenience.
A, 7B, 7C, and 14 is a speed measuring means 5, 9A, 9B, 9C, 10A, 10B, 1 for convenience.
If described as any one of 0C, 11A, 11B, and 11C, when the speed measuring means 14 is provided at the subsequent stage of the exit of the mold 2 (refer to the speed measuring means 14 indicated by an imaginary line), as shown in FIG. In addition, the measured value of the speed measuring means 14 indicates the speed at which the volume of the molding material Mr that has been compressed in the mold 2 is released from the compressed state at the outlet of the mold 2 and expands. Is superimposed on the speed of the extruded product P extruded from the mold 2. For this reason, when the speed measuring means 14 is provided after the exit of the mold 2 (speed measuring means 14 indicated by an imaginary line), the speed of the extruded product P extruded from the mold 2 can be accurately determined. Cannot be measured.

On the other hand, when the speed measuring means 14 is provided in the mold 2, the molding material flowing in the mold 2 is kept in a predetermined compressed state in the mold 2, As in the case where the measuring means 14 is provided at the subsequent stage of the exit of the mold 2 (see the speed measuring means 14 indicated by the imaginary line), the measured value includes the molding material Mr which has been compressed in the mold 2. At the outlet of the mold 2, there is no occurrence of a phenomenon that the speed at which the volume expands due to release from the compressed state is superimposed on the speed of the extruded product P extruded from the mold 2.

Accordingly, when the speed measuring means 14 is provided in the mold 2, the speed of the molding material flowing into the mold 2 can be accurately measured. If the extruded product P is manufactured by synchronizing the drawing speed of the drawing device 4, the speed measuring device 5 can accurately measure the speed of the extruded product extruded from the mold. As a result, the drawing speed of the drawing means 4 is also synchronized with the speed of the extruded product extruded from the mold, so that the difference between the drawing speed of the drawing means 4 and the speed of the extruded product P extruded from the mold 2 is reduced. There is no variance in the dimensions of the extruded product P, which is a cause.

The speed measuring means 9A, 9B, 9C, 1
Since each of 0A, 10B, 10C, 11A, 11B, and 11C accurately measures the speed of the extruded product P extruded from the mold 2 at each measurement site, the speed measuring means 9A, 9C, 10A, and 10B. , 10C, 11A, 11
Speed adjusting means 6 based on the measured values of B and 11C.
By controlling A, 6B, 7A, 7B, and 7C, it is less likely that the speed adjusting means 6A, 6B, 7A, 7B, 7C malfunctions due to noise or the like.

It should be noted that the speed measuring means 14 improves the accuracy of the measured value of the measurement site as long as it is located inside the mold 2 as compared with the case where it is provided at the subsequent stage of the exit of the mold 2. In the article manufacturing apparatus, it is desirable that the velocity and / or velocity distribution of the molding material flowing into the mold 2 be a predetermined velocity and / or velocity distribution as early as possible. In consideration of such a situation, it is preferable to be located on the upstream side in the extrusion die 2, that is, on the entrance side of the die 2, more specifically, in the die land 2b.

Therefore, in this extruded product manufacturing apparatus,
Each of the speed measuring means 9A, 9B, 9C is provided at a position before the speed adjusting means 6A, 6B in the mold 2, and each of the speed measuring means 10A, 10B, 10C is connected to the speed adjusting means 7A, 7B. , 7C at a predetermined position on the front side. Each of the speed measuring means 9A, 9B, 9C is provided at a position before the speed adjusting means 6A, 6B in the mold 2, and is provided at each of the upper, middle, and lower sides of the mold 2. I have.

The speed adjusting means 6A controls the choke amount based on the value measured by the speed measuring means 9A, and the speed adjusting means 6B controls the choke amount based on the value measured by the speed measuring means 9C. The amount is controlled, and the speed adjusting means 6A and the speed adjusting means 6B
The choke amount is controlled so that the measured value of the speed measuring means 9A and the measured value of the speed measuring means 9B become equal.

This will be described in more detail with reference to FIG. FIG. 3 is a cross-sectional view schematically illustrating a phenomenon that occurs in the mold 2. FIG. 3A illustrates a case where a speed measuring unit is not provided in a stage preceding the speed adjusting unit 6A and the speed adjusting unit 6B. FIG. 3B is a cross-sectional view schematically illustrating a phenomenon occurring in the mold 2. FIG. 3B is a diagram illustrating speed measuring means 9A, 9B, and 9 in the mold 2 before the speed adjusting means 6A and the speed adjusting means 6B.
FIG. 3C is a cross-sectional view (correction method) schematically showing a phenomenon that occurs in the mold 2 when C is provided. FIG. It is sectional drawing which shows typically the case where the building material which has is manufactured.

First, if the speed v1 of the lower surface side in the mold 2 becomes faster than the speed v2 of the upper surface side in the mold 2, the speed of the molding material flowing into the mold 2 becomes higher. v1> v
2), the extruded product P manufactured by the mold 2 warps upward (see FIGS. 3A and 3B). Conversely, when the speed v1 on the lower surface side in the mold 2 becomes lower than the speed v2 on the upper surface side in the mold 2 (v1 <v2), the extruded product P manufactured by the mold 2 moves downward. This causes a phenomenon of warpage on the side (not shown).

As shown in FIG. 3A, the speed adjusting means 6
If no speed measuring means is provided before A and the speed adjusting means 6B, the speed adjusting means 6A and the speed adjusting means 6
B, the molding material Mr flowing into the mold 2 at the previous stage
Even if there is a difference between the speed v1 on the lower surface side in the mold 2 and the speed v2 on the upper surface side in the mold 2, this cannot be detected, so that the speed adjusting means 6A and the speed adjusting means 6B are not detected. Cannot perform the adjustment operation. Therefore, the molding material Mr having a difference between the speed v1 on the lower surface side in the mold 2 and the speed v2 on the upper surface side in the mold 2 is provided downstream of the speed adjusting means 6A and 6B. Is being washed away.

On the other hand, in this molded article manufacturing apparatus 1, FIG.
As shown in (b), speed measuring means 9A, 9B,
9C, the speed v1 on the lower surface side in the mold 2 and the upper surface in the mold 2 are applied to the molding material Mr flowing into the mold 2 at a stage preceding the speed adjusting means 6A and the speed adjusting means 6B. When a phenomenon such as that a difference occurs with the speed v2 of the mold 2 occurs, the speed measuring means 9C provided on the lower surface side of the mold 2 measures the speed v1 and the speed v1 is measured. The speed measuring means 9A provided on the side measures the speed v2, whereby the speed v1 on the lower surface side in the mold 2 is set in the mold 2.
Can be known in advance that the speed v2 is higher than the speed v2 on the upper surface side in the mold 2 (v1> v2), and the speed adjusting means 6B on the lower surface side in the mold 2 is fast. The choke means is protruded into the mold 2, and the speed is low.
When the choke means of the speed adjusting means 6A on the upper surface side in the mold 2 projects into the mold 2, it can be accommodated in the mold 2.

As a result, the speed v1 of the molding material Mr flowing on the lower surface side of the mold 2 becomes gradually lower because the choke means of the speed adjusting means 6B protrudes into the mold 2, and the speed v1 is relatively reduced. , Molding material M flowing on the lower surface side in mold 2
r and the velocity v2 of the molding material Mr flowing on the upper surface side
Can be adjusted to the same speed (v1 = v2). Conversely, the speed measuring means 9 provided on the lower surface side in the mold 2
C measures the velocity v1, and the velocity measuring means 9A provided on the upper surface side in the mold 2 measures the velocity v2, whereby the velocity on the lower surface side in the mold 2 in the mold 2. v1
Can be known in advance in the mold 2 that the speed v2 is lower than the speed v2 on the upper surface side in the mold 2 (v1 <v2). When the choke means of the speed adjusting means 6B protrudes into the mold 2, the choke means is accommodated in the mold 2 so that the speed is high.
The choke means of the speed adjusting means 6 </ b> A on the upper surface side in the mold 2 can protrude into the mold 2.

As a result, the speed v2 of the molding material Mr flowing on the upper surface side of the mold 2 gradually decreases, since the choke means of the speed adjusting means 6A protrudes into the mold 2, and becomes relatively slow. , Molding material M flowing on the lower surface side in mold 2
r and the velocity v2 of the molding material Mr flowing on the upper surface side
Can be adjusted to the same speed. The speed measuring means 9B shown in FIG. 3B is not directly related to the adjustment control of the speed adjusting means 6A and the speed adjusting means 6B, and is not an essential means. Although not shown, as shown in FIG. 3 (b), when the speed measuring means 9B is provided, the measured value of the speed measuring means 9A, the measured value of the speed measuring means 9B, and the measured value of the speed measuring means 9C are integrated. Since the velocity distribution of the molding material Mr flowing in the mold 2 in the height direction can be detected, the speed adjusting means can be further finely adjusted based on the velocity distribution of the molding material Mr flowing in the mold 2. Adjustment control of 6A and the speed adjusting means 6B becomes possible.

In the mold 2 shown in FIG. 3C, in order to easily determine the adjustment amount (projection amount) of the choke means of the speed adjusting means 6A and 6B, the upper surface side in the mold 2 is used. The speed measuring means 9D is provided at a predetermined position after the speed adjusting means 6A, and the speed measuring means 9E is provided at a predetermined position after the speed adjusting means 6B on the lower surface side in the mold 2. . In FIG. 3C, the core 2 is further placed in the mold 2.
An example in which a is provided is shown.

As described above, if the speed adjusting means 9D and 9E are provided, the measured values va1, va2,... Measured by the speed measuring means 9A provided on the upper surface side of the mold 2 are provided.
, va, and each of the measured values va1, va2,.
When the adjustment amount (projection amount) H of the choke means of the speed adjustment means 6A (the amount of protrusion from complete accommodation: 0 to 1) is changed at each of n, the correlation with the measurement value of the speed measurement means 9D The relationship is actually tested, and the measured value of the speed measuring means 9A provided before the speed adjusting means 6A and the speed adjusting means 6A
It is possible to easily create a control table indicating a correlation with the adjustment amount of the control.

The measured values vc1, vc2,..., Measured by the speed measuring means 9C provided on the lower surface side of the mold 2
Adjustment amount (projection amount) H of the choke means of the speed adjustment means 6C at each time of vcn (complete projection from complete accommodation: 0 to 1)
Is changed, the correlation with the measured value of the speed measuring means 9E is actually tested, and the measured value of the speed measuring means 9C provided before the speed adjusting means 6B and the measured value of the speed adjusting means 6B are compared. A control table indicating the correlation with the adjustment amount can be easily created.

Here, in the extruded product manufacturing apparatus 1, when the set speed of the molding material Mr flowing into the mold 2 at the time of manufacturing the extruded product P is vp, the speed adjusting means 6 A Referring to the control table, the speed adjusting means 6A
The measured value v9d of the speed measuring means 9D corresponding to the measured value actually measured by the speed measuring
When d = vp, the adjustment amount is used, and the adjustment amount of the speed adjustment unit 6A corresponds to the measurement value actually measured by the speed measurement unit 9A with reference to the control table of the speed adjustment unit 6B. When the measured value v9e of the speed measuring means 9E is v9e
= Adjustment amount when vp.

Then, in this way, the speed adjusting means 6
A control table showing the correlation between the measured value of the speed measuring means 9A provided before A and the adjustment amount of the speed adjusting means 6A, and the speed measuring means 9C provided before the speed adjusting means 6B.
If a control table indicating the correlation between the measured value of the speed adjustment unit 6B and the adjustment amount of the speed adjustment unit 6B can be created, as shown in FIG. 4A, the control table T6A of the speed adjustment unit 6A and the speed adjustment unit 6B When each of the control tables T6B is stored in the control means CPU1 and CPU2, the speed measurement means 9
The measured values of A and 9C are input to the control means CPU1 and CPU2, and each of the control means CPU1 and CPU2 refers to each of the control table T6A of the speed adjustment means 6A and the control table T6B of the speed adjustment means 6B to determine the speed. Adjusting means 6
If each of A and 6B is controlled, the molding material Mr
, The production of the extruded product P can be automated.

As shown in FIG. 4B, the target value vp of the measured value of the speed measuring means 9D is stored in the control means CPU1, and the target value vp of the measured value of the speed measuring means 9E is stored in the control means CPU2. The measured values of the speed measuring means 9A and 9D are inputted to the control means CPU1, and the speed adjusting means 6A is controlled so that the measured value v9e of the speed measuring means 9E becomes the target value vp. Then, each of the measured values of the speed measuring means 9C and 9E is inputted to the control means CPU2, and the speed adjusting means 6B is controlled by the speed adjusting means 6B so that the measured value v9e of the speed measuring means 9E becomes the target value vp. You may make it control.

That is, the measured value v9a of the speed measuring means 9A>
At the time of the target value vp, the choke means of the speed adjusting means 6A is protruded into the mold 2, and the measured value v9 of the speed measuring means 9A is obtained.
When a <target value vp, the operation of accommodating the choke means of the speed adjusting means 6A in the mold 2 is performed by the measured value v9a of the speed measuring means 9A and the measured value v9d of the speed measuring means 9D.
Are both set to the target value vp, and when the measured value v9c of the speed measuring means 9C> the target value vp, the choke means of the speed adjusting means 6B is protruded into the mold 2, and the speed measuring means 9C When the measured value v9c <the target value vp,
The operation of accommodating the choke means of the speed adjusting means 6A in the mold 2 is controlled so that both the measured value v9c of the speed measuring means 9C and the measured value v9e of the speed measuring means 9e become the target value vp.

In FIG. 4, the member device indicated by 12 is an A / D which inputs the measured values of the respective speed measuring means to the CPUs 1 and 2.
This is a conversion device (the same applies to FIG. 6). Next, a configuration for controlling the velocity distribution in the width direction of the molding material Mr flowing in the mold 2 of the extrusion molded product manufacturing apparatus 1 to a desired velocity distribution will be described. FIG. 5 is a configuration diagram schematically showing a rear part of a position where the speed adjusting means 6A and 6B of the mold 2 shown in FIG. 1 are provided, and FIG.
It is sectional drawing which shows roughly the state which looked at the metal mold | die 2 from the side direction, and FIG.5 (b) is sectional drawing which follows the VV line | wire shown to Fig.5 (a).

The speed measuring means 9A and the speed adjusting means 6A,
In addition, a desired speed distribution is provided in the height direction in the mold 2 by the speed measuring unit 9B and the speed adjusting unit 6B.
The molding material is provided in the mold 2 at a speed subsequent to the speed adjusting means 6A, 6B, and the speed measuring means 10A, 10B, 10C.
Are extruded to the provided positions. At this time, when the respective measured values measured by the speed measuring means 10A, 10B, and 10C are integrated, the speed measuring means 10A, 10B
The velocity distribution in the width direction in the mold 2 at the positions where B and 10C are provided can be measured.

In this apparatus 1, the speed adjusting means 7A is controlled based on the value measured by the speed measuring means 10A, and the speed adjusting means 7B is controlled based on the measured value from the speed measuring means 10B. Based on the measurement value of the means 10C,
The speed adjusting means 7C is controlled separately and independently. Generally, the velocity distribution in the width direction of the mold 2 flows quickly at the center of the mold 2 (each measurement position of the velocity measuring means 10B), and is closer to the sides S1 and S2 of the mold 2 (the velocity measuring means 1).
0A and 10C), but the molding material M on the side close to the side surfaces S1 and S2 of the mold 2
Compared to the speeds v3 and v5 of r, the speed v4 at the center becomes abnormally high, or the difference between the speeds v3 and v5 of the molding material Mr on the side close to the side surfaces S1 and S2 of the mold 2. Causes variations in the dimensions of the manufactured extruded product.

In this extruded product manufacturing apparatus 1, the speed v4 of the molding material Mr measured by the speed measuring means 10B is equal to the speed v3 of the molding material Mr measured by the speed measuring means 10A.
Alternatively, if the speed distribution becomes abnormally high with respect to the speed v5 of the molding material Mr measured by the speed measurement unit 10C, and the speed distribution is different from the predetermined speed distribution, the speed measurement unit 10B determines the speed distribution based on the measurement value of the speed measurement unit 10B. The choke means of the speed adjusting means 7B is projected into the mold 2.

Further, the speed v5 of the molding material Mr measured by the speed measuring means 10C becomes faster than the speed v3 of the molding material Mr measured by the speed measuring means 10A, and the imbalance between the speeds v3 and v5. If this occurs, the choke means of the speed adjusting means 7C on the side where the speed of the molding material Mr is higher is projected into the mold 2, and the speed adjusting means 7A
If the choke means is protruded into the mold 2, the choke means of the speed adjusting means 7A is accommodated in the mold 2 (see FIG. 5B).

Further, the speed v5 of the molding material Mr measured by the speed measuring means 10C becomes slower than the speed v3 of the molding material Mr measured by the speed measuring means 10A, so that an imbalance exists between the speeds v3 and v5. If this occurs, the choke means of the speed adjusting means 7A on the side where the speed of the molding material Mr is higher is projected into the mold 2, and the speed adjusting means 7C
In the case where the choke means protrudes into the mold 2, the choke means of the speed adjusting means 7C is accommodated in the mold 2.

In the mold 2 shown in FIG. 5B, the adjustment amount (projection amount) of the choke means of the speed adjusting means 7A, 7B, 7C.
In order to be able to determine easily, at a predetermined position after the speed adjusting means 7A on the lower surface side in the mold 2,
The speed measuring means 11A is provided, and the speed measuring means 11 is provided at a predetermined position on the lower surface side of the mold 2 and subsequent to the speed adjusting means 7B.
B is provided, and a speed measuring unit 11C is provided at a predetermined position after the speed adjusting unit 7C.

Thus, the speed adjusting means 11A, 11
If B and 11C are provided, the measured value v10a measured by the speed measuring means 10A provided on the lower surface side of the mold 2
, V10an and the measured value v10a1, v10a2,..., V10an at each adjustment amount (projection amount) H of the choke means of the speed adjustment means 11A (complete projection from complete accommodation: When 0) to 1) were changed, the correlation with the measured value of the speed measuring means 11A was actually tested, and the measured value of the speed measuring means 10A provided before the speed adjusting means 7A was compared with the speed. A control table showing a correlation with the adjustment amount of the adjusting means 7A can be easily created.

The measured values v10b1 and v10b measured by the speed measuring means 10B provided on the lower surface side of the mold 2
, V10bn and the measured value v10b1,
In each of v10b2,..., v10bn, when the adjustment amount (projection amount) H of the choke unit of the speed adjustment unit 11B (complete projection from complete accommodation: 0 to 1) is changed, the speed measurement unit 11B Is actually tested, and a control table showing the correlation between the measured value of the speed measuring means 10B provided before the speed adjusting means 7B and the adjustment amount of the speed adjusting means 7B is easily prepared. Can be created.

The measured values v10c1, v10c measured by the speed measuring means 10C provided on the lower surface side of the mold 2
, V10cn and the measured value v10c1,
In each of v10c2,..., v10cn, when the adjustment amount (projection amount) H of the choke means of the speed adjustment means 11C (complete projection from complete accommodation: 0 to 1) is changed, the speed measurement means 11B Is actually tested, and a control table showing the correlation between the measured value of the speed measuring means 10C provided at the preceding stage of the speed adjusting means 7C and the adjustment amount of the speed adjusting means 7C is easily prepared. Can be created.

In this extruded product manufacturing apparatus 1, when the extruded product P is manufactured, when the set speed of the molding material Mr flowing into the die 2 is vp, the die 2
Assuming that the velocity of the molding material at the center of the mold is vp1 and the velocity of the molding material on the side close to the side surface of the mold 2 is vp2,
Referring to the control table of the speed adjusting unit 7B, the adjustment amount of the speed adjusting unit 7B is set to the measured value v of the speed measuring unit 11B corresponding to the measurement value actually measured by the speed measuring unit 10A.
d is an adjustment amount when v11b = vp1.

Further, with reference to the control table of the speed adjusting means 7A, the adjustment amount of the speed adjusting means 7A is determined by the measured value v11a of the speed measuring means 11A corresponding to the measured value actually measured by the speed measuring means 10A. , V11a = vp2, the adjustment amount is set, and the adjustment amount of the speed adjustment unit 7C corresponds to the measurement value actually measured by the speed measurement unit 10C with reference to the control table of the speed adjustment unit 7C. , The measured value v11c of the speed measuring means 11C is v11c = vp
The adjustment amount when it becomes 2.

Then, in this way, the speed adjusting means 7
A control table showing the correlation between the measured value of the speed measuring means 10A provided at the preceding stage of A and the adjustment amount of the speed adjusting means 7A, and the speed measuring means 10 provided at the preceding stage of the speed adjusting means 7B.
A control table showing the correlation between the measured value of B and the adjustment amount of the speed adjusting unit 7B, and the measured value of the speed measuring unit 10C provided before the speed adjusting unit 7C and the adjustment amount of the speed adjusting unit 7C. If a control table showing the correlation can be created, as shown in FIG. 5A, the control table T7A of the speed adjusting unit 7A and the control table T of the speed adjusting unit 7B
When each of the control tables 7B and 7C of the speed adjusting means 7C is stored in the control means CPU3, CPU4, and CPU5, each of the measured values of the speed measuring means 10A, 10B, and 10C is input to the control means CPU3, CPU4, and CPU5.
In each of the control means CPU3, CPU4 and CPU5, the control table T7A of the speed adjustment means 7A and the speed adjustment means 7B
With reference to each of the control table T7B and the control table T7C of the speed adjusting means 7C, the speed adjusting means 7A and 7
If each of B and 7C is controlled, the molding material Mr
, The production of the extruded product P can be automated.

As shown in FIG. 6 (b), the target value vp2 of the measured value of the speed measuring means 11A is stored in the control means CPU3.
And the target value vp of the measured value of the speed measuring means 11B.
1 is stored in the control means CPU4, and the speed measuring means 11C
The target value vp2 of the measured value is stored in the control means CPU5, each of the measured values of the speed measuring means 10A and 11A is input to the control means CPU3, and the measured value v11e of the speed adjusting means 7A is set to the target value. The speed adjusting means 7A is controlled so as to be vp2, and the speed measuring means 10B,
Each of the measured values of 11B is inputted to the control means CPU4, and the speed adjusting means 7B is set to the measured value v11b of the speed measuring means 11B.
Is controlled to the target value vp1, and the measured values of the speed measuring means 10C and 11C are input to the control means CPU5, and the speed adjusting means 7C is measured by the speed measuring means 11C. The speed adjusting means 7B may be controlled so that v11c becomes the target value vp2.

That is, the measured value v10 of the speed measuring means 10A
a> When the target value vp2, the choke means of the speed adjusting means 7A protrudes into the mold 2, and when the measured value v10a of the speed measuring means 10A <the target value vp2, the speed adjusting means 7
The operation of housing the choke means A in the mold 2
Measurement value v10a of speed measuring means 10A and speed measuring means 1
Control is performed such that both the measured value v11a of 1A becomes the target value vp2, and when the measured value v10b of the speed measuring means 10B> the target value vp1, the choke means of the speed adjusting means 7B is protruded into the mold 2 to measure the speed. Measured value v1 of means 10B
When 0b <target value vp1, the operation of accommodating the choke means of the speed adjusting means 7B in the mold 2 is performed by setting the measured value v10b of the speed measuring means 10B and the measured value v11b of the speed measuring means 11b together with the target value vp1. And when the measured value v10c of the speed measuring means 10C> the target value vp2, the choke means of the speed adjusting means 7C is projected into the mold 2, and the measured value v1 of the speed measuring means 10C is obtained.
When 0c <the target value vp2, the operation of accommodating the choke means of the speed adjusting means 7C in the mold 2 is performed by changing the measured value v10c of the speed measuring means 10C and the measured value v11c of the speed measuring means 11C to the target value vp2. Control so that

FIG. 7 shows speed measuring means 10A, 10B, 1
It is a block diagram specifically explaining the structure of 0C. Each of the speed measuring means 10A, 10B, and 10C brings the rotating disk into contact with the molding material flowing in the mold, and measures the speed of the molding material at the position where the speed measuring means is provided from the rotational speed of the disk. Even if it is a contact type, or a measurement window is provided in the mold, a laser beam is applied to the molding material flowing into the mold from the measurement window, and the molding material is flowed into the mold. May be a non-contact type in which the speed of the molding material at the position where the speed measuring means is provided is measured from the reflected light reflected by.

However, in order to construct the extruded product manufacturing apparatus 1 at low cost, the speed measuring means 10A, 10B, 1
As each of the OCs, an inexpensive and accurate one must be selected. Extruded product manufacturing apparatus 1 shown in FIG.
In this embodiment, a pair of pressure gauges Pr1 and Pr2 are used as speed measuring means 10A, 10B and 10C at predetermined intervals L in the direction of the molding material flowing in the mold 2.

Here, assuming that the material characteristic is τ = K · dγ / dt, the shear stress τ at the wall surface of the material flowing in the slit is as follows: From the measured pressure difference ΔP measured by the pressure gauge Pra and the pressure gauge Pr2, it can be expressed as τ = h · ΔP / 2L, and the shear rate dγ / dt = 6Q / (w ·
h2).

Here, Q is a volume flow rate, and the volume flow rate Q
Is the moving speed V of the material, Q = hWV
Therefore, the moving speed V of the material is V = h2 · ΔP /
(12 · K · L). Here, each of the speed measuring means 10A, 10B and 10C has a predetermined distance L in the direction of the molding material flowing in the mold 2.
Although the example using each of the pair of pressure gauges Pr1 and Pr2 is shown, all of the speed measuring means according to the present invention are
A pair of pressure gauges Pr1 and Pr2 may be used.

FIG. 8 is a cross-sectional view schematically showing the configuration of control of the drawing-out means 4 of the apparatus 1 for manufacturing an extruded product. In the extruded product manufacturing apparatus 1, a speed measuring means 20 for measuring the speed of the molding material Mr flowing in the mold 2 is further provided near the exit in the mold 2, and the extruded product P is continuously drawn. In the process, the control means CPU 6 and 7 synchronize the drawing speed v4 of the drawing means 4 with the measured value v20 of the speed measuring means 20 provided near the exit in the mold.

In the apparatus 1 for manufacturing an extruded product, the mold 2
The speed measuring means 20 is provided near the outlet in the mold 2 instead of at the subsequent stage of the outlet of
In addition, since the drawing speed v4 of the drawing means 4 is synchronized, the molding material M
The phenomenon that the volume expands when r is released from the compressed state at the outlet of the mold 2 does not overlap.

Thus, the speed measuring means 20 is connected to the mold 2
Since the speed of the extruded product P extruded from the mold 2 can be accurately measured, the drawing speed v4 of the drawing means 4 is also synchronized with the speed v20 of the extruded product P extruded from the mold 2, so that
There is no variation in the dimensions of the extruded product P due to the difference between the drawing speed v4 of the drawing means 4 and the speed v20 of the extruded product P extruded from the mold 2.

[0098] The apparatus 1 for manufacturing an extruded product according to the present invention.
Then, various modifications are conceivable. FIG. 9 shows an example in which another speed measuring means 24 (speed measuring means 9D, 9E, 11) provided downstream of the speed adjusting means 13 is provided immediately behind the exit of the mold 2. Further, in the extruded product manufacturing apparatus 1, the speed adjusting means 7A, 7B, 7C and the speed measuring means 10A, 10B, 10C, 11A, 11B, 1
Although the example in which 1C is provided on the lower surface side of the mold 2 has been described, the speed adjusting means 7A, 7B, 7C and the speed measuring means 10A, 10A
B, 10C, 11A, 11B, and 11C may be provided on the upper surface side of the mold 2, or may be provided on both the upper surface side and the lower surface side of the mold 2.

In this example, the speed adjusting means 7A, 7
Although an example in which three speed adjusting means B and 7C are provided in the width direction of the mold 2 is shown, this is merely an example, and two or more speed adjusting means provided in the width direction of the mold 2 are provided. Everything provided is included in the present invention.

[0100]

As described in detail above, claim 1 is as follows.
In the apparatus for manufacturing an extruded product described in the above, a speed measuring means is provided in the mold, the speed measuring means measures the speed of the molding material flowing into the mold, the measured value of the speed measuring means,
Controlling the speed adjusting means so as to be a predetermined constant value,
An extruded product is manufactured by setting the speed of the molding material flowing into the mold to a predetermined constant value.

Thus, before the molding material becomes an extruded product, it is possible to set the molding material flowing into the mold to a predetermined constant value in advance. A speed measuring means is provided to measure the speed of the extruded product extruded from the mold, and after the extruded product has already been manufactured, the molding material to be flown into the mold afterwards is fixed to a predetermined constant value. Value compared to conventional extrusion molding equipment.
It is difficult to form portions having different dimensions in the manufactured extruded product.

When the speed measuring means is provided in the mold, when the speed measuring means provided at the subsequent stage of the exit of the mold is provided, the molding material is included in the measured value at the exit of the mold. Since there is no problem that the speed of expansion of the volume caused by releasing from the compressed state is superimposed on the speed of the extruded product extruded from the mold, the speed measuring means can more accurately measure the speed in the mold. The speed of the molding material flowing into the container can be measured.

In this extruded product manufacturing apparatus, an extruded product can be manufactured by accurately measuring the speed of the molding material flowing into the mold, so that a speed measuring means is provided at a stage subsequent to the exit of the mold. Compared with a conventional extruded product manufacturing apparatus that measures the speed of an extruded product extruded from a mold and manufactures the extruded product, it is difficult to form a part having different dimensions in the manufactured extruded product.

In the apparatus for manufacturing an extruded product according to the second aspect of the present invention, since the speed measuring means is provided in the extrusion die before the speed adjusting means, the speed adjusting means can be predicted and controlled. By controlling, the speed measuring means is provided in the extrusion die after the speed adjusting means, and the speed measuring means provided in the extrusion die after the speed adjusting means is feedback-controlled by the speed measuring means. In comparison with the case, it is difficult to form a part having different dimensions in the manufactured extruded product.

In the apparatus for manufacturing an extruded product according to the third aspect, the control indicating the correlation between the measured value of the speed measuring means provided in advance of the speed adjusting means and the adjustment amount of the speed adjusting means, which is prepared in advance. According to the table, an extruded product having excellent dimensional accuracy can be automatically manufactured. In the apparatus for manufacturing an extruded product according to the fourth aspect, the speed adjusting means is controlled by two speed measuring means provided before and after the speed adjusting means in the extrusion die, and excellent in dimensional accuracy. Extruded products can be manufactured automatically.

In the apparatus for manufacturing an extruded product according to the fifth aspect, the speed adjusting means is provided by two speed measuring means provided in the extrusion die before the speed adjusting means and after the die outlet. And an extruded product excellent in dimensional accuracy can be automatically manufactured. In the apparatus for manufacturing an extruded product according to claim 6, in the step of continuously drawing out the extruded product, the value measured by the second speed measuring means provided on the upper surface side of the extrusion die and the value of the extrusion die are determined. A first speed adjusting means provided on the upper surface in the extrusion die and a lower surface in the extrusion die so that the measured value of the fourth speed measuring means provided on the lower surface side is the same as a predetermined value. Since the speed of the molding material flowing on the upper surface and the lower surface in the extrusion die can be made equal to each other by adjusting the second speed adjusting means provided in Is unlikely to occur.

In the apparatus for manufacturing an extruded product according to the seventh aspect, in the step of continuously drawing out the extruded product, the value measured by the first speed measuring means provided on the upper surface side of the extrusion die and the extruded product may be used. A first speed adjusting means provided on the upper surface in the extrusion die, such that the measured value of the third speed measuring means provided on the lower surface side of the die is the same as a predetermined value; Since the speed of the molding material flowing between the upper surface and the lower surface in the extrusion die can be made equal, since the second speed adjusting means provided on the lower surface in the inside is adjusted, the extrusion molding to be manufactured is performed. It is difficult to warp the product.

[0108] In the apparatus for manufacturing an extruded product according to the eighth aspect, a plurality of speed adjusting means for adjusting the speed of the molding material flowing into the extrusion die in a width direction at a predetermined position in the extrusion die. A plurality of measuring the speed of the molding material flowing into the extrusion die so as to correspond to each of the plurality of speed adjustment means, in front of each of the plurality of speed adjustment means in the extrusion die. Speed measuring means is provided.

Thus, when a plurality of speed adjusting means are provided in the width direction at a predetermined position in the extrusion die, the measured values of the plurality of speed adjusting means are integrated, so that the inside of the extrusion die can be integrated. The velocity distribution of the molding material flowing in the width direction of the mold can be measured. In this apparatus for manufacturing an extruded product, a velocity distribution of a molding material flowing in an extrusion mold in a width direction of the mold is measured, and a plurality of speed adjusting means are provided corresponding to the measured values of the plurality of speed measuring means. By controlling each of the plurality of speed adjusting means based on each of the measured values of the plurality of speed measuring means, the speed distribution in the width direction of the mold of the molding material flowing in the extrusion mold is provided. Can be a predetermined velocity distribution.

[0110] In the apparatus for manufacturing an extruded product according to the ninth aspect, a plurality of speed adjusting means corresponding to each of the plurality of speed adjusting means may be provided before the plurality of speed adjusting means provided in the width direction of the mold. Since each of the measuring means is provided, and based on the measured value of each of the plurality of speed measuring means, each of the plurality of speed adjusting means corresponding to each of the plurality of speed measuring means is predicted and controlled. At each subsequent stage of the speed adjusting means, a plurality of speed measuring means are provided corresponding to each of the plurality of speed adjusting means, and a plurality of speed measuring means are provided based on the measured values of the plurality of speed measuring means. It is possible to prevent the molding material whose velocity distribution has not been adjusted from being sent out to the rear of the mold as compared with the case of performing feedback adjustment based on the measured values of the plurality of speed adjusting means corresponding to each of the above.

The adjustment of each of the plurality of speed adjusting means is performed based on the measured values of the plurality of speed measuring means provided in front of each of the plurality of speed adjusting means provided in the width direction of the mold. Using this device, the same test as in the process of extruding a molding material into an extruded product is repeated, and if these relationships are created as a control table, the molding material is extruded based on the control table. The process of making a product can be automated.

In the apparatus for manufacturing an extruded product according to the tenth aspect, since the choke means is used as the speed adjusting means so that the choke means can be easily inserted into and retracted from the mold, the choke means can be projected into the mold. Depending on the quantity, the speed of the molding material flowing through the mold can easily be changed. In the apparatus for manufacturing an extruded product according to the eleventh aspect, since an inexpensive pressure gauge is employed as the speed measuring means, the manufacturing cost of the apparatus for manufacturing an extruded product can be reduced.

In the apparatus for manufacturing an extruded product according to the twelfth aspect, the speed measuring means is provided near the exit in the mold, not at the subsequent stage of the exit of the mold, and the value measured by the speed measuring means is provided to the drawing means. Since the drawer speed is synchronized,
In the measured value of the speed measuring means, the molding material, at the exit of the mold,
The phenomenon that the volume expands due to the release from the compressed state does not cause a superposition phenomenon.

As a result, the speed measuring means can accurately measure the speed of the extruded product extruded from the mold.
Since the drawing speed of the drawing means is also synchronized with the speed of the extruded product extruded from the mold, the difference between the drawing speed of the drawing means and the speed of the extruded product extruded from the mold causes an extruded product. No dimensional variation occurs.

[Brief description of the drawings]

FIG. 1 is a configuration diagram schematically showing an apparatus for manufacturing an extruded product according to the present invention, and FIG. 1 (a) schematically shows a state where the apparatus for manufacturing an extruded product according to the present invention is viewed in a lateral direction. FIG. 1B is a schematic plan view taken along line II in FIG.

FIG. 2 is a view for explaining the reason why all speed measuring means are provided at predetermined positions in a mold;

FIG. 3 is a cross-sectional view schematically illustrating a phenomenon that occurs in a mold; FIG. 3A is a cross-sectional view schematically illustrating a phenomenon that occurs in a mold without a speed measuring unit and a speed adjusting unit; FIG. 3 (b) shows a method of correcting a phenomenon such as that shown in FIG. 3 (a) in the mold by providing a speed measuring means and a speed adjusting means, and FIG. In the case of manufacturing a building material having a hollow by using the manufacturing apparatus of the extruded product,
It is sectional drawing which shows typically.

FIG. 4 is a configuration diagram schematically showing a configuration for automating an apparatus for manufacturing an extruded product according to the present invention. FIG. 4A shows one example, and FIG. 4B shows another example.

5 is a configuration diagram schematically showing a rear part of a position shown in FIG. 1 where a mold speed adjusting unit is provided, and FIG.
FIG. 5B is a cross-sectional view schematically showing a state of the mold as viewed from the side, and FIG. 5B is a cross-sectional view taken along the line VV shown in FIG.

FIG. 6 is a configuration diagram schematically showing a configuration for automating an apparatus for manufacturing an extruded product according to the present invention. FIG. 6A shows one example, and FIG. 6B shows another example.

FIG. 7 is a configuration diagram specifically illustrating a configuration of a speed measuring means used in the apparatus for manufacturing an extruded product according to the present invention.

FIG. 8 is a cross-sectional view schematically showing a configuration of control of a drawer of the apparatus for manufacturing an extruded product according to the present invention.

FIG. 9 is a perspective view schematically showing a configuration of a modification of the apparatus for manufacturing an extruded product according to the present invention.

FIG. 10 is a configuration diagram schematically showing a conventional apparatus for manufacturing an extruded product, and FIG. 10 (a) is a cross-sectional view schematically showing a state in which the manufacturing apparatus for an extruded product is viewed in a lateral direction. And
FIG. 10B is a cross-sectional view taken along line XX shown in FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Manufacturing apparatus of an extrusion molded article 2 Extrusion die 3 Extruder 4 Extraction means 5, 10A, 10B, 10C, 11A, 11B, 11
C, 14 speed measuring means 6A, 6B, 7A, 7B, 7C, 13 speed adjusting means

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[Procedure amendment]

[Submission date] June 26, 1998

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0003

[Correction method] Change

[Correction contents]

[0003] Such an extruded product is required to be uniform, excellent in dimensional accuracy, and free from warpage. FIG. 10 is a configuration diagram schematically showing an extruded product manufacturing apparatus which has already been developed to solve such a problem. FIG. 10 (a) shows an extruded product manufacturing apparatus. It is a cross-sectional view schematically showing a state seen in the side direction,
FIG. 10B is a schematic cross-sectional view taken along line XX shown in FIG.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0018

[Correction method] Change

[Correction contents]

The present invention has been made in order to solve the above-described problems. Instead of observing the speed of an extruded product extruded from a mold at a stage subsequent to the exit of the mold, the present invention has been made.
The speed and / or velocity distribution of the molding material flowing into the mold is measured on the side close to the extruder of the mold, and at an early stage, the speed of the molding material flowing into the mold is determined at a predetermined speed and / or speed. An object of the present invention is to provide an extruded product manufacturing apparatus capable of manufacturing an extruded product that is uniform, has excellent dimensional accuracy, and has no warp by being distributed. .

Claims (12)

[Claims] 1. A method of manufacturing an extruded product, in which a molding material is flowed into an extrusion die, and an extruded product formed into a predetermined shape by the extrusion die is continuously drawn by a drawing means. In the apparatus, at a predetermined position in the extrusion die, a speed adjusting means for adjusting the speed of the molding material flowing into the extrusion die, and a speed for measuring the speed of the molding material flowed into the extrusion die. Measuring means, wherein in the step of continuously drawing out the extruded product, the speed adjusting means is controlled so that a value measured by the speed measuring means becomes a predetermined speed. , Extruded product manufacturing equipment. 2. The method according to claim 1, wherein the speed measuring means includes:
The apparatus for manufacturing an extruded product according to claim 1, wherein the apparatus is provided in a stage preceding the speed adjusting unit. 3. A control table showing a correlation between a measured value of a speed measuring means provided in a preceding stage of the speed adjusting means and an adjustment amount of the speed adjusting means is prepared in advance. In the step of pulling out, the speed of the molding material flowing into the mold is measured by speed measuring means provided in a stage preceding the speed adjusting means in the extrusion die, and the speed of the speed adjusting means in the extrusion die is measured. 3. The apparatus according to claim 2, wherein the control unit automatically controls the speed adjusting unit by comparing a measured value of a speed measuring unit provided in a preceding stage with a control table stored in the control unit. 5. The apparatus for producing an extruded product according to claim 1. 4. Production of an extruded product wherein a molding material is flowed into an extrusion die, and an extruded product formed into a predetermined shape by the extrusion die is continuously drawn out by a drawing means. In the apparatus, at a predetermined position in the extrusion die, a speed adjustment unit for adjusting the speed of the molding material flowing into the extrusion die is provided, and at a stage preceding the speed adjustment unit in the extrusion die, A speed measuring means for measuring a speed of the molding material flowing into the extrusion die; a speed for measuring a speed of the molding material flowing into the extrusion die after the speed adjusting means in the extrusion die; Providing a measuring means, in the step of continuously drawing out the extruded product, measuring a speed measuring means provided at a subsequent stage of the speed adjusting means based on a measured value of a speed measuring means provided at a preceding stage of the speed adjusting means. Value is predetermined As the speed and adjusting the speed adjusting means, extrusion molding manufacturing apparatus. 5. A method of manufacturing an extruded product, in which a molding material is flowed into an extrusion die, and an extruded product formed into a predetermined shape by the extrusion die is continuously drawn by drawing means. In the apparatus, at a predetermined position in the extrusion die, a speed adjustment unit for adjusting the speed of the molding material flowing into the extrusion die is provided, and at a stage preceding the speed adjustment unit in the extrusion die, Providing a speed measuring means for measuring the speed of the molding material flowing into the extrusion die, a speed measuring means for measuring the speed of the extruded product extruded from the extrusion die, at a stage subsequent to the outlet of the extrusion die. In the step of continuously drawing out the extruded product, based on a measurement value of a speed measuring unit provided in a preceding stage of the speed adjusting unit, a speed measuring unit provided in a subsequent stage of an exit of the extrusion die is provided. The measured value is In so that, and adjusting the speed adjusting means, extrusion molding manufacturing apparatus. 6. A method of manufacturing an extruded product, in which a molding material is flowed into an extrusion die, and an extruded product formed into a predetermined shape by the extrusion die is continuously drawn out by a drawing means. In the apparatus, at a predetermined position on one surface in the extrusion die, a first speed adjusting means for adjusting a speed of a molding material flowing into the extrusion die is provided, and another one in the extrusion die is provided. A second speed adjusting means for adjusting the speed of the molding material flowing into the extrusion die is provided at a predetermined position on the surface, and the extrusion is provided before the first speed adjustment means in the extrusion die. First to measure the speed of the molding material flowing into the mold
A second speed measuring means for measuring the speed of the molding material flowing into the extrusion die, at a stage subsequent to the first speed adjusting means in the extrusion die.
A third speed measuring means for measuring the speed of the molding material flowing into the extrusion die before the second speed adjusting means in the extrusion die.
A speed measuring means for measuring the speed of the molding material flowing into the extrusion die, at a stage subsequent to the second speed adjusting means in the extrusion die.
In the step of continuously drawing out the extruded article, the measured value of the second speed measuring means and the measured value of the fourth speed measuring means are both equal to a predetermined value. The first speed measuring means based on the measurement value of the first speed measuring means;
And adjusting the second speed adjusting means based on the measurement value of the third speed measuring means.
An apparatus for manufacturing an extruded product, wherein the speed adjusting means is adjusted. 7. A method of manufacturing an extruded product, in which a molding material is flowed into an extrusion die, and an extruded product formed into a predetermined shape by the extrusion die is continuously drawn by a drawing means. In the apparatus, at a predetermined position on one surface in the extrusion die, a first speed adjusting means for adjusting a speed of a molding material flowing into the extrusion die is provided, and another one in the extrusion die is provided. A second speed adjusting means for adjusting the speed of the molding material flowing into the extrusion die is provided at a predetermined position on the surface, and the extrusion is provided before the first speed adjustment means in the extrusion die. Speed measuring means for measuring the speed of the molding material flowing into the mold; measuring the speed of the molding material flowing into the extrusion mold before the second speed adjusting means in the extrusion mold; Speed measuring means to continuously pull out the extruded product In this case, the measured value of the speed measuring means provided before the first speed adjusting means and the measured value of the speed measuring means provided before the second speed adjusting means are both equal to a predetermined value. Thus, the first speed adjusting means is controlled based on the measurement value of the speed measuring means provided before the first speed adjusting means, and the speed measurement provided before the second speed adjusting means is provided. An apparatus for manufacturing an extruded product, wherein the second speed adjusting means is controlled based on a measurement value of the means. 8. A method of manufacturing an extruded product, in which a molding material is flowed into an extrusion die, and an extruded product formed into a predetermined shape by the extrusion die is continuously drawn by a drawing means. In the apparatus, a plurality of speed adjusting means for adjusting a speed of a molding material flowing into the extrusion die are provided in a width direction of a predetermined position in the extrusion die, and the plurality of speed adjustment units in the extrusion die are provided. A plurality of speed measuring means for measuring the speed of the molding material flowing into the extrusion die are provided in front of each of the speed adjusting means so as to correspond to each of the plurality of speed adjusting means, After each of the plurality of speed adjusting means in the extrusion mold, a plurality of measuring the speed of the molding material flowing into the extrusion mold so as to correspond to each of the plurality of speed adjusting means. Speed measurement means for connecting the extruded products In the subsequent withdrawing step, based on each of the measured values of the plurality of speed measuring means, provided in front of the plurality of speed adjusting means and provided so as to correspond to each of the plurality of speed adjusting means. In the subsequent stage of the plurality of speed adjusting means, provided so as to correspond to each of the plurality of speed adjusting means, so that each of the measured values of the plurality of speed measuring means is a predetermined speed, An apparatus for manufacturing an extruded product, wherein each of the plurality of speed adjusting means is adjusted. 9. A method of manufacturing an extruded product, in which a molding material is flowed into an extrusion die, and the extruded product formed into a predetermined shape by the extrusion die is continuously drawn by a drawing means. In the apparatus, a plurality of speed adjusting means for adjusting a speed of a molding material flowing into the extrusion die are provided in a width direction of a predetermined position in the extrusion die, and the plurality of speed adjustment units in the extrusion die are provided. Before the speed adjustment means,
In order to correspond to each of the plurality of speed adjusting means, a plurality of speed measuring means for measuring the speed of the molding material flowing into the extrusion die is provided, and in the step of continuously drawing out the extruded product, Based on each of the measured values of the plurality of speed measuring means,
An apparatus for manufacturing an extruded product, wherein each of the plurality of speed adjusting means is controlled such that each of the measured values of the plurality of speed measuring means has a predetermined speed. 10. An apparatus for manufacturing an extruded product according to claim 1, wherein said speed adjusting means is a choke means provided so as to be able to come and go in a mold. 11. The pressure measuring means is a pair of pressure gauges provided on the inner surface of the mold at predetermined intervals in the direction in which the molding material flows in the mold. An apparatus for producing an extruded product according to any one of claims 1 to 10. 12. A speed measuring means for measuring a speed of a molding material flowing in the mold is provided near an outlet in the mold, and in the step of continuously drawing the extruded product, the drawing of the drawing means is performed. The apparatus for manufacturing an extruded product according to any one of claims 1 to 11, wherein a speed is synchronized with a measured value of a speed measuring means provided near an outlet in the mold.