CN112810105A - Extrusion die capable of automatically adjusting section size - Google Patents

Abstract

The invention provides an extrusion die capable of automatically adjusting the section size, belonging to the technical field of rubber machinery. The extrusion die includes a first die plate, a second die plate, a paddle and a micro telescopic power element; the first die plate and the second die plate are positioned directly and form a rubber extrusion channel, and the second die A micro telescopic power element is installed inside the board, the telescopic direction of the micro telescopic power element points to the rubber extrusion channel, and the telescopic end of the micro telescopic power element is fixedly connected with a paddle; in the initial state of the micro telescopic power element, the paddle is far away from the micro telescopic power element. The end of the power element is flush with the side wall of the rubber extrusion channel. The invention adjusts the size of the extrusion channel by generating a tiny stroke of the micro telescopic power element, which can not only greatly improve the dimensional accuracy of the extrusion of the product, but also the adjustment method is convenient and automatic, which can improve the production efficiency and reduce the production cost.

Description

An extrusion die that can automatically adjust the section size

technical field

The invention relates to the technical field of rubber machinery, in particular to an extrusion die that can automatically adjust the cross-sectional size.

Background technique

In the prior art, the main rubber parts in tire products (such as tread, sidewall, apex, cushion rubber, etc.) are generally produced by extrusion process, so the extrusion process of rubber parts is the most important An important process link in a production enterprise. The quality and precision of extruded products directly affect the final quality and precision of tire products, as well as the direct cost and process cost of tire production. The cross-sectional dimension accuracy of the semi-finished product extrusion process has a decisive influence on the quality and accuracy of the extruded product. The section size of the extrusion die is one of the most important factors affecting the section accuracy of the extruded product.

The adjustment of the section size of the extrusion die is a complex process that requires repeated modification and extrusion verification. In order to obtain the ideal cross-sectional size of the die, the traditional method is that the mouth-shaped debugging personnel test the product in advance under the condition of a certain extruder speed and linkage line access speed, that is, under the condition of a reasonable speed ratio parameter group. Extrusion expansion rate at the mouth, and compare the section size of the product required by the process, so that the section size of the extruded mouth is manually repaired by experience. After debugging a product with a qualified section size, record the repaired die plate parameters and the matching extruder speed and linkage line access speed to the industrial computer in the form of formula parameters. At this point, the debugging work of the die plate is finished, and it can be put into production use.

When the product of this specification needs to be produced, the operator directly selects and calls the recipe of this specification in the industrial computer for production. However, this production method cannot timely adjust the errors caused by various unavoidable factors, that is, its anti-interference ability is poor, resulting in poor dimensional accuracy of the extruded semi-finished products. Because in the actual extrusion production process, there are many factors that affect the accuracy of the extrusion section size of the semi-finished product in the extrusion process, such as: forced feeding fluctuations caused by the processing errors of the equipment itself, and fluctuations in the amount of glue discharged per screw revolution , In addition, the extrusion fluctuation caused by the origin and batch of raw materials, the quality fluctuation of the same batch of rubber caused by the processing error of the previous process of the rubber, or the unpredictable process error caused by manual operation error or other unexpected reasons Etc., these various forms of process errors or quality fluctuations will cause the cross-sectional size of the semi-finished product during the extrusion process to exceed the range of fluctuations allowed by the process requirements, which may lead to substandard products.

Based on this, the current rubber extrusion process needs an extrusion die that can more automatically adjust the size of the broken code.

SUMMARY OF THE INVENTION

In order to solve the above problems, the purpose of the present invention is to provide an extrusion die that can automatically adjust the cross-sectional size. The extrusion die that can automatically adjust the cross-sectional size can adjust the size of the extrusion channel by generating a tiny stroke through a micro telescopic power element. , not only can greatly improve the sectional dimensional accuracy of product extrusion, but also the adjustment method is convenient and automatic, which can improve production efficiency and reduce production costs.

In order to achieve the above object, the technical scheme adopted in the present invention is:

An extrusion die that can automatically adjust the cross-sectional size, comprising a first die plate, a second die plate, a paddle and a miniature telescopic power element; the first die plate and the second die plate are positioned opposite to each other. A rubber extrusion channel is formed, and a number of micro-telescopic power element installation grooves and paddle grooves are opened inside the second die plate, and a micro-telescopic power element is installed in the micro-telescopic power element The telescopic direction points to the rubber extrusion channel, the telescopic end of the micro telescopic power element is fixedly connected with a paddle, the paddle is slidably arranged in the paddle groove in the second mouth plate, and the micro telescopic power element is installed in the groove In the initial state of the micro telescopic power element, the end of the paddle away from the micro telescopic power element is just right with the side wall of the rubber extrusion channel. flush.

In the present invention, preferably, the pick and the side wall of the pick slot are precisely matched and slidable relative to each other.

In the present invention, preferably, a cover plate groove is opened on the outer plate surface of the second die plate, and the cover plate groove is communicated with the installation groove of the micro telescopic power element and the pick groove; the cover plate groove There is a cover plate on it.

In the present invention, preferably, when the cover plate is installed in the cover plate groove, the plate surface of the cover plate is exactly flush with the outer plate surface of the second die plate, and the side surface of the cover plate and the side wall of the rubber extrusion channel are Just flush, the paddles fit precisely with the side walls of the cover and slide relative to each other.

In the present invention, preferably, the first die plate and the second die plate are detachably connected, and on the opposite surfaces of the two, one surface is provided with a positioning pin, and the other surface is provided with a matching positioning hole .

In the present invention, preferably, the micro telescopic power element is a micro servo electric cylinder or a micro hydraulic oil cylinder.

In the present invention, preferably, a plurality of the paddles are provided, the slots of the paddle grooves are connected with each other, and the plurality of paddles are in close contact with each other.

In the present invention, preferably, each paddle is correspondingly provided with one or more miniature telescopic power elements.

Owing to adopting the above-mentioned technical scheme, the present invention has the following beneficial effects:

In the present invention, by adding one or several sets of picks to the die plate assembly, in the case of fluctuations in the cross-sectional size of the product caused by various factors, a tiny stroke can be generated by the micro power element, so that the die plate can be built into the die plate. The paddles are extended or retracted by the corresponding stroke, and then the size of the product extrusion channel in the die plate can be controlled, thereby greatly improving the sectional dimensional accuracy of the product extrusion, and the adjustment method is convenient and automatic, which can improve production efficiency. ,reduce manufacturing cost.

Description of drawings

FIG. 1 is a schematic structural diagram of an extrusion die provided by an embodiment of the present invention.

FIG. 2 is a cross-sectional view at A-A of FIG. 1 .

FIG. 3 is a partial enlarged view of I in FIG. 2 .

Among them, 1-1, the first mouth plate; 1-2, the second mouth plate; 1-3, cover plate; 1-4, 1# pick; 1-5, 2# pick; 1-6 , Micro telescopic power element; 1-7, 1# screw; 1-8, 2# screw; 1-9, locating pin; 1-10, extrusion channel.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. The accompanying drawings are for illustrative purposes only, and represent only schematic diagrams, not physical drawings, and should not be construed as limitations on this patent. In order to better illustrate the specific embodiments of the present invention, some parts of the accompanying drawings may be omitted or enlarged. or reduction, does not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures, components and their descriptions in the drawings may be omitted. Based on the embodiments of the present invention, those skilled in the art may All other embodiments obtained without creative work fall within the protection scope of the present invention.

In the description of the present invention, it should also be noted that, unless otherwise expressly specified and limited, the terms "arrangement" and "connection" should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integrated connection. It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication between the two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

In order to solve the problem that it is difficult to accurately adjust the section size during the extrusion process of rubber products when it exceeds the fluctuation range allowed by the process requirements, the present invention provides an extrusion die that can automatically adjust the section size, see Figures 1 and 2, It includes a first die plate 1-1, a second die plate 1-2, a paddle 1-4/1-5 and a miniature telescopic power element 1-6; the first die plate 1-1 and the second die plate 1-1 The position of the die plate 1-2 is directly opposite to form the rubber extrusion channel 1-10, and the first die plate 1-1 and the second die plate 1-2 are connected with the head of the extruder in a conventional manner; the present invention The improvement lies in that, the inside of the second die plate 1-2 is provided with several miniature telescopic power element installation grooves and paddle grooves, and the micro telescopic power element installation grooves are installed with miniature telescopic power elements 1-6, micro telescopic power element 1 The telescopic direction of -6 points to the rubber extrusion channel 1-10, the telescopic end of the micro telescopic power element 1-6 is fixedly connected with the paddle 1-4/1-5, and the paddle 1-4/1-5 is slidably arranged on the first In the pick groove in the two-port mold plate 1-2, the installation groove of the micro telescopic power element is connected with the pick groove, and the pick groove and the rubber extrusion channel 1-10 are connected with each other; the micro telescopic power element 1-6 is initially In the state, the end of the paddle 1-4/1-5 away from the micro telescopic power element 1-6 is just flush with the side wall of the rubber extrusion channel 1-10. The micro telescopic power elements 1-6 in the present invention can receive external commands. When the section size of a certain part of the rubber product is too large, the micro telescopic power elements 1-6 in the corresponding part can be extended a certain distance under the control of the external command, and the The paddles 1-4/1-5 push out the extrusion channel 1-10 for a certain distance, so as to adjust the size of the extrusion channel 1-10 and realize the automatic adjustment of the section size of the rubber product. After extension, when the section size of a certain part of the rubber product is too small, the micro telescopic power element 1-6 of the corresponding part can be retracted by a certain distance under the control of external commands, and the paddles 1-4/1-5 can be retracted to adjust The size of the extrusion channel 1-10 can realize the automatic adjustment of the section size of the rubber product.

In some preferred embodiments of the present invention, the picks 1-4/1-5 are precisely matched with the side walls of the pick grooves and can slide relative to each other. As long as the matching gap is as small as 0.01-0.03mm, the glue will not penetrate into this in the gap. Thereby, there is less possibility of glue overflowing into the paddle slot and the mounting slot of the micro telescopic power element. In order to make the whole more beautiful and convenient for maintenance, a cover plate groove is opened on the outer plate surface of the second die plate 1-2, and the cover plate groove is communicated with the installation groove and the pick groove of the micro telescopic power element; The cover plate groove is provided with a cover plate 1-3. The cover plate 1-3 can be fixed with the second mouth plate 1-2 by 1# screws 1-7. Micro telescopic power elements 1-6 and paddles 1-4/1-5 are observed and overhauled. When the cover plate 1-3 is installed in the cover plate groove, the plate surface of the cover plate 1-3 is exactly flush with the outer plate surface of the second die plate 1-2, and the side surface of the cover plate 1-3 is in line with the rubber extrusion channel. The side walls of 1-10 are just flush, and the paddles are precisely matched with the side walls of cover 1-3 and can slide relative to each other, making the whole more neat and beautiful.

In some preferred embodiments of the present invention, the first die plate 1-1 and the second die plate 1-2 are detachably connected, and specifically can be connected by screws, such as the 2# screws 1-2 shown in the figure. 8 For connection, the opposite surfaces of the first die plate 1-1 and the second die plate 1-2 are provided with positioning pins 1-9 on one surface and matching positioning holes on the other surface, so as to facilitate the two The relative position of the operator can be determined, and the installation efficiency and installation accuracy can be improved.

The miniature telescopic power elements 1-6 are miniature servo electric cylinders or miniature hydraulic oil cylinders, or other electromechanical elements that can generate tiny strokes. The power of the miniature telescopic power element 1-6 is guided to the outside by means of grooving in the second die plate 1-2, which is not shown schematically in the figure.

In some preferred embodiments of the present invention, a plurality of paddles are provided, the notches of the paddle slots are connected with each other, and the plurality of paddles 1-4/1-5 are in close contact with each other. Specifically, multiple sections can be set according to the section shape of the rubber product and the section size to be controlled, so that the section size parameters of each part of the product can be adjusted and controlled. For example, Fig. 1 shows the extruded tread product as an example, and 1# picks 1-4a/1-4b and 2# picks 1-5a/1-5b are respectively set on the side and the crown. Control extrusion channels 1-10. Of course, for the extrusion of different products, picks of different shapes and numbers of picks can be set. Each paddle can be correspondingly provided with one or more micro telescopic power elements, and a paddle with multiple micro telescopic power elements is conducive to the stability of the paddle movement. As shown in Figure 1, the two paddles on the crown are set correspondingly There are four micro telescopic power elements (1-6c/1-6d/1-6e/1-6f), and two micro telescopic power elements (1-6a/1-6b/1-6g) /1-6h).

In the present invention, by adding one or several sets of picks to the die plate assembly, in the case of fluctuations in the cross-sectional size of the product caused by various factors, a tiny stroke can be generated by the micro power element, so that the die plate can be built into the die plate. The paddles are extended or retracted by the corresponding stroke, and then the size of the product extrusion channel in the die plate can be controlled, thereby greatly improving the sectional dimensional accuracy of the product extrusion, and the adjustment method is convenient and automatic, which can improve production efficiency. ,reduce manufacturing cost.

The above description is a detailed description of the preferred feasible embodiments of the present invention, but the embodiments are not intended to limit the scope of the patent application of the present invention. All equivalent changes or modifications completed under the technical spirit suggested by the present invention shall belong to This invention covers the scope of the patent.

Claims (8)

1. The utility model provides a but extrusion die of automatically regulated cross section size which characterized in that: comprises a first mouth-shaped plate, a second mouth-shaped plate, a shifting sheet and a micro telescopic power element; the first die plate and the second die plate are opposite in position and form a rubber extrusion channel, a plurality of micro telescopic power element mounting grooves and a shifting piece groove are formed in the second die plate, a micro telescopic power element is mounted in each micro telescopic power element mounting groove, the telescopic direction of each micro telescopic power element points to the rubber extrusion channel, the telescopic end of each micro telescopic power element is fixedly connected with a shifting piece, the shifting piece is arranged in the shifting piece groove in the second die plate in a sliding mode, the micro telescopic power element mounting grooves are communicated with the shifting piece grooves, and the shifting piece grooves are communicated with the rubber extrusion channel; under the initial state of the micro telescopic power element, the tail end of the shifting sheet far away from the micro telescopic power element is just flush with the side wall of the rubber extrusion channel.

2. An extrusion die capable of automatically adjusting a cross-sectional dimension as set forth in claim 1, wherein: the shifting sheet is precisely matched with the side wall of the shifting sheet groove and can slide relatively.

3. An extrusion die capable of automatically adjusting a cross-sectional dimension as set forth in claim 1, wherein: a cover plate groove is formed in the outer side plate surface of the second mouth-shaped plate and is communicated with the micro telescopic power element mounting groove and the shifting piece groove; and a cover plate is arranged on the cover plate groove.

4. An extrusion die capable of automatically adjusting a cross-sectional dimension as set forth in claim 3, wherein: when the apron was installed at the apron inslot, the face of apron just in time parallel and level with the outside face of second mouth of the staff board, the side of apron just in time parallel and level with the lateral wall that the passageway was extruded to rubber, plectrum and apron lateral wall precise fit and relative slip.

5. An extrusion die capable of automatically adjusting a cross-sectional dimension as set forth in claim 1, wherein: the first mouth-shaped plate and the second mouth-shaped plate are detachably connected, one face of each of the first mouth-shaped plate and the second mouth-shaped plate is provided with a positioning pin, and the other face of each of the first mouth-shaped plate and the second mouth-shaped plate is provided with a matched positioning hole.

6. An extrusion die capable of automatically adjusting a cross-sectional dimension as set forth in claim 1, wherein: the micro telescopic power element is a micro servo electric cylinder or a micro hydraulic oil cylinder.

7. An extrusion die capable of automatically adjusting a cross-sectional dimension as set forth in claim 1, wherein: the plectrum sets up a plurality ofly, and the notch department in plectrum groove communicates each other, and mutual in close contact with between a plurality of plectrums.

8. An extrusion die capable of automatically adjusting a cross-sectional dimension as set forth in claim 1, wherein: each shifting piece is correspondingly provided with one or more micro telescopic power elements.

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