WO2018079241A1 - Extrusion head and extrusion device - Google Patents

Abstract

Provided are an extrusion head and an extrusion device having good working efficiency, whereby a secondary extruder can easily be added. An extrusion head 3 in which a plurality of extruders 2 for extruding an elastomer material G are connected. The present invention includes: a head body 6 having a connecting part 9 to which the extruders 2 are connected; a pre-former block 7 attached to a first side part S1 which is a position of the head body 6 excluding the connecting part 9, the pre-former block 7 having an extrusion port 11a for the elastomer material G; and at least one flow channel block 8 provided so as to be attachable to and detachable from a second side part S2 on the reverse side of the head body 6 from the first side part S1. The at least one flow channel block 8 includes a first flow channel block 8A having a secondary extruder 14 smaller than the extruders 2.

Description

Extrusion head and extrusion apparatus

The present invention relates to an extrusion head and an extrusion apparatus to which a plurality of extruders for extruding an elastomer material are connected.

2. Description of the Related Art Conventionally, an extrusion apparatus for laminating and extruding a plurality of elastomer materials (for example, rubber) having different blends is known to make an elastomer member such as a tire tread. Such an extrusion apparatus includes an extrusion head having an extrusion port for an elastomer material, and a plurality of extruders connected to the extrusion head. Each extruder has a screw for extruding the elastomer material, and extrudes the elastomer material of different blends toward the extrusion head while kneading.

In recent years, it is sometimes necessary to add an elastomer material having a different composition even in a small amount even in the above-described extrusion apparatus. In the conventional extrusion apparatus, in order to add an additional elastomer material, for example, an extrusion head of an existing extrusion apparatus is additionally processed to increase the number of extruders connected to the extrusion head. However, such additional processing of the extrusion head requires a great deal of time and cost.

Therefore, Patent Document 1 below proposes an extrusion apparatus in which an additional sub-extruder is connected to a die in which an extrusion port of an extrusion head is formed. The extrusion apparatus of patent document 1 can increase the number of the extruders connected with an extrusion head by replacing | exchanging the existing die | dye with the die | dye corresponding to an additional subextruder.

JP 2000-31816 A

Generally, the shape of the extrusion port is changed according to the type of product. Therefore, the die is frequently replaced with one having a shape of an extrusion port corresponding to a product to be manufactured. However, in the extrusion apparatus of Patent Document 1, since the sub-extruder is connected to the die, it is necessary to move the sub-extruder every time the die is replaced, and there is a problem that workability at the time of die replacement is poor. there were.

Further, the extrusion apparatus of Patent Document 1 has a problem that since the sub-extruder is arranged on the extrusion port side, the work space on the extrusion port side is small and the workability at the time of extrusion is poor. In such an extrusion apparatus, the elastomer material extruded from the extrusion port may come into contact with the sub-extruder, which may deteriorate the quality of the final product.

The present invention has been devised in view of the actual situation as described above, and is based on the fact that the sub-extruder is connected to the flow path block, and the extrusion head is easy to add the sub-extruder and has good workability. The main object is to provide an extrusion apparatus.

The present invention is an extrusion head to which a plurality of extruders for extruding an elastomer material are connected, the head body having a connection portion to which each of the extruders is connected, and the connection portion of the head body is excluded. A preformer block which is attached to the first side portion which is a position and has an extrusion port for the elastomer material, and at least a removably provided second side portion of the head body opposite to the first side portion. One flow path block, and at least one flow path block includes a first flow path block having a sub-extruder smaller than each of the extruders.

In the extrusion head according to the present invention, it is desirable that the first flow path block has a sub flow path for communicating the sub extruder and the preformer block.

In the extrusion head according to the present invention, the first flow path block includes a flow path block body to which the sub-extruder is connected, and an insert block disposed between the flow path block body and the preformer block. It is desirable to include.

In the extrusion head according to the present invention, the preformer block has at least three surfaces whose directions are different from each other, and the insert block is formed in a concave shape in contact with the three surfaces of the preformer block. It is desirable to have one side.

In the extrusion head according to the present invention, it is desirable that the preformer block is in contact with the head body or the flow path block on at least three surfaces having different directions.

In the extrusion head according to the present invention, at least one of the flow path blocks includes a second flow path block that does not have the sub-extruder, and the first flow path block and the second flow path block are exchanged. It is desirable to be possible.

The present invention is an extrusion apparatus including the above-described extrusion head and a plurality of the extruders connected to the extrusion head.

In the extrusion apparatus according to the present invention, it is preferable that each extruder has a screw for extruding the elastomer material, and the sub-extruder has a small screw smaller than the screw of each extruder.

The extrusion head according to the present invention includes a head body having a connecting portion to which each extruder is connected, and a first side portion which is a position excluding the connecting portion of the head body, and an extrusion port for the elastomer material. And a pre-former block having at least one flow path block detachably provided on the second side of the head body opposite to the first side. Such an extrusion head can easily maintain the inside of the extrusion head by removing the flow path block.

In the extrusion head of the present invention, at least one of the flow path blocks includes a first flow path block having a sub-extruder smaller than each of the extruders. For this reason, the extrusion head can add a sub-extruder by exchanging the flow path block with the first flow path block. Further, since the sub-extruder is arranged on the side opposite to the extrusion port, the workability during extrusion is improved. Such an extrusion head can improve the quality of the manufactured product without the risk of contact between the extruded elastomer material and the sub-extruder.

It is a front view which shows one Embodiment of the extrusion apparatus of this invention. It is a fragmentary sectional view of an extrusion device. It is a fragmentary sectional view of an extrusion head. It is an exploded sectional view of the 1st channel block. It is a fragmentary sectional view of the extrusion head equipped with the 2nd channel block.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a cross-sectional view showing an extrusion apparatus 1 according to this embodiment. As shown in FIG. 1, the extrusion apparatus 1 of the present embodiment includes a plurality of extruders 2 and an extrusion head 3 to which the plurality of extruders 2 are connected.

The plurality of extruders 2 connected to the extrusion head 3 include, for example, a first extruder 2A, a second extruder 2B, and a third extruder 2C. The number of extruders 2 may be two, or four or more.

FIG. 2 is a partial cross-sectional view of the extrusion apparatus 1. As shown in FIG. 2, the extruder 2 is for extruding the elastomer material G. Each extruder 2 of this embodiment has a substantially cylindrical barrel 4 and a screw 5 disposed in the barrel 4. That is, the first extruder 2A has a first barrel 4A and a first screw 5A, the second extruder 2B has a second barrel 4B and a second screw 5B, and the third extruder 2C The third barrel 4C and the third screw 5C are provided.

Each barrel 4 is connected to the extrusion head 3, for example. In the barrel 4 of this embodiment, the first barrel 4A is connected to one side of the extrusion head 3, and the second barrel 4B and the third barrel 4C are connected to the other side of the extrusion head 3.

Each screw 5 is for extruding the elastomer material G in the barrel 4. The screw 5 of this embodiment has the largest first screw 5A and the smallest third screw 5C. The magnitude | size of the screw 5 is suitably set according to the product which should be manufactured, for example, the screw 5 of the same magnitude | size may be sufficient. For supplying the elastomer material G into the barrel 4, a conventionally known supply method can be appropriately employed.

The extrusion head 3 of the present embodiment includes a head main body 6, a preformer block 7, and at least one flow path block 8 that is detachably provided. Such an extrusion head 3 can easily maintain the inside of the extrusion head 3 by removing the flow path block 8.

The head body 6 preferably has a connecting portion 9 to which each extruder 2 is connected. The connecting portion 9 of the present embodiment is connected to the first connecting portion 9A to which the first extruder 2A is connected, the second connecting portion 9B to which the second extruder 2B is connected, and the third extruder 2C. A third connecting portion 9C. Each connecting portion 9 preferably has a shape suitable for the barrel 4 of each extruder 2.

The head main body 6 of the present embodiment has a flow path 10 for communicating each extruder 2 and the preformer block 7. The flow path 10 of the present embodiment includes a first flow path 10A that communicates with the first extruder 2A, a second flow path 10B that communicates with the second extruder 2B, and a third flow that communicates with the third extruder 2C. Road 10C. The first flow path 10A and the second flow path 10B are preferably formed along the boundary between the head body 6 and the flow path block 8, respectively.

The preformer block 7 is attached to, for example, the first side portion S1 that is a position excluding the connecting portion 9 of the head body 6. The preformer block 7 preferably includes a die 11 having an extrusion port 11a for the elastomer material G. The extrusion port 11a of the die 11 can extrude the elastomer material G extruded from each extruder 2 by laminating each other according to the product to be manufactured.

The extrusion head 3 of the present embodiment has no other members around the die 11 of the preformer block 7. Since such an extrusion head 3 has a large working space near the preformer block 7, the die 11 can be easily replaced with one having the shape of the extrusion port 11a corresponding to the product to be manufactured.

FIG. 3 is a partial cross-sectional view of the extrusion head 3. As shown in FIG. 3, the preformer block 7 of the present embodiment has a plurality of internal flow paths 12 that communicate with the flow path 10 of the head body 6. For example, the internal flow paths 12 are joined together at the preformer portion 7a of the preformer block 7, and the elastomer materials G are laminated on each other. The laminated elastomer material G is extruded from the extrusion port 11a of the die 11 to the outside.

The preformer block 7 is in contact with the head body 6 or the flow path block 8 on at least three surfaces 13 having different directions, for example. The three surfaces 13 of the preformer block 7 of the present embodiment include a first surface 13A and a second surface 13B that are in contact with the head body 6.

The pre-former block 7 includes, for example, a first pre-former block 7A in which each internal flow path 12 communicates at least three surfaces 13 and the pre-former unit 7a. The internal flow path 12 of the first preformer block 7A of the present embodiment communicates with the flow path 10 of the head body 6 on the first surface 13A and the second surface 13B.

As shown in FIG. 1, at least one flow path block 8 is detachably provided on the second side S2 of the head body 6 opposite to the first side S1. That is, the flow path block 8 is located on the opposite side of the head body 6 from the preformer block 7. Such a channel block 8 can be easily removed to maintain the inside of the extrusion head 3.

As described above, the head main body 6 of the present embodiment has the first side part S1 and the second side part S2 opposite to the first side part S1. And this head main body 6 has a connection part to which each extruder 2 is connected in the position different from 1st side part S1.

The at least one flow path block 8 of the present embodiment includes a first flow path block 8A having a sub-extruder 14 smaller than each extruder 2. The sub-extruder 14 is desirably located on the opposite side of the first flow path block 8A from the preformer block 7. For this reason, the extrusion head 3 can add the sub-extruder 14 by replacing the flow path block 8 with the first flow path block 8A. Moreover, since the subextruder 14 is arranged on the opposite side to the extrusion port 11a, the workability at the time of extrusion improves. Such an extrusion head 3 can improve the quality of the manufactured product without the possibility that the extruded elastomer material G and the sub-extruder 14 come into contact with each other.

FIG. 4 is an exploded cross-sectional view of the first flow path block 8A. As shown in FIGS. 2 and 4, the sub-extruder 14 of the present embodiment includes a small cylindrical barrel 15 and a small screw 16 disposed in the small barrel 15. The small barrel 15 is connected to, for example, the first flow path block 8A. The small screw 16 is preferably smaller than the screw 5 of each extruder 2.

The first flow path block 8 </ b> A of the present embodiment includes a flow path block body 17 to which the sub-extruder 14 is connected, and an insert block 18 disposed between the flow path block body 17 and the preformer block 7. It is out. The channel block body 17 has, for example, a sub-connecting portion 19 to which the sub-extruder 14 is connected. The insert block 18 of the present embodiment is inserted on the opposite side of the flow channel block body 17 from the sub-connecting portion 19.

The first flow path block 8A of the present embodiment has a sub flow path 20 that allows the sub extruder 14 and the preformer block 7 to communicate with each other. It is desirable that the secondary flow path 20 communicates from the flow path block body 17 to the insert block 18.

3 and 4, the insert block 18 of the present embodiment has at least three surfaces 21 formed in a concave shape in contact with at least three surfaces 13 of the preformer block 7. At least three surfaces 21 of the insert block 18 are a fourth surface 21A that contacts the first surface 13A of the preformer block 7, a fifth surface 21B that contacts the second surface 13B, and a sixth surface that contacts the third surface 13C. 21C.

The secondary flow path 20 of the insert block 18 of the present embodiment communicates with the internal flow path 12 of the first preformer block 7A on the third surface 13C and the sixth surface 21C. Such a sub flow channel 20 can smoothly flow the additional elastomer material G extruded from the sub extruder 14 to the internal flow channel 12 of the first preformer block 7A.

The insert block 18 is preferably formed of a material that can be easily processed. Such an insert block 18 can be easily precision processed as an adjustment member when the preformer block 7 and the head body 6 or the flow path block 8 are in contact with each other at the three surfaces 13 and 21.

For this reason, the extrusion head 3 employs the insert block 18 so that the internal flow path 12 of the first preformer block 7A, the flow path 10 of the head body 6 or the sub flow path 20 of the first flow path block 8A The airtightness can be improved.

It is desirable that at least one flow path block 8 includes a second flow path block 8B that does not have the auxiliary extruder 14. In the extrusion head 3 of the present embodiment, the first flow path block 8A and the second flow path block 8B are interchangeable.

For this reason, when the product which does not require the additional elastomer material G by the sub-extruder 14 is manufactured, the channel block 8 can be manufactured by exchanging the first channel block 8A with the second channel block 8B. . Such an extrusion apparatus 1 can perform inspection and maintenance of the first flow path block 8A while the second flow path block 8B is mounted on the extrusion head 3 to manufacture a product.

FIG. 5 is a partial cross-sectional view of the extrusion head 3 equipped with the second flow path block 8B. As FIG. 5 shows, the 2nd flow path block 8B does not have the insert block 18 and the subchannel 20, for example. In the second flow path block 8B of the present embodiment, the position corresponding to the position of the insert block 18 of the first flow path block 8A is hollow.

Therefore, the preformer block 7 is arranged in contact with the head body 6 or the second flow path block 8B on the first surface 13A and the second surface 13B among at least three surfaces 13 having different directions. . In such a preformer block 7, a second preformer block 7B in which the internal flow path 12 communicates the first surface 13A, the second surface 13B, and the preformer portion 7a can be suitably employed.

As mentioned above, although especially preferable embodiment of this invention was described in full detail, this invention is not limited to embodiment of illustration, It can deform | transform and implement in a various aspect.

DESCRIPTION OF SYMBOLS 2 Extruder 3 Extrusion head 6 Head main body 7 Preformer block 8 Flow path block 8A 1st flow path block 9 Connection part 11a Extrusion port 14 Subextruder G Elastomer material S1 1st side part S2 2nd side part

Claims (8)

An extrusion head to which a plurality of extruders for extruding an elastomeric material are coupled,
A head body having a connecting portion to which the extruders are connected;
A preformer block attached to a first side portion of the head main body excluding the connecting portion and having an extrusion port of the elastomer material;
Including at least one flow path block detachably provided on a second side opposite to the first side of the head body,
The extrusion head according to claim 1, wherein the at least one channel block includes a first channel block having a sub-extruder smaller than each of the extruders. The extrusion head according to claim 1, wherein the first flow path block has a sub flow path for communicating the sub extruder and the preformer block. 3. The first flow path block according to claim 1, wherein the first flow path block includes a flow path block main body to which the sub-extruder is connected, and an insert block disposed between the flow path block main body and the preformer block. The extrusion head described. The preformer block has at least three surfaces whose directions are different from each other,
The extrusion head according to any one of claims 1 to 3, wherein the insert block has at least three surfaces formed in a concave shape in contact with the three surfaces of the preformer block. The extrusion head according to any one of claims 1 to 3, wherein the preformer block is in contact with the head body or the flow path block on at least three surfaces having different directions. At least one of the flow path blocks includes a second flow path block that does not have the sub-extruder,
The extrusion head according to any one of claims 1 to 5, wherein the first flow path block and the second flow path block are interchangeable. An extrusion apparatus comprising the extrusion head according to any one of claims 1 to 6 and a plurality of the extruders connected to the extrusion head. Each extruder has a screw for extruding the elastomeric material,
The extrusion apparatus according to claim 7, wherein the sub-extruder has a small screw smaller than the screw of each of the extruders.

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