Extrusion die for modified ultra-high molecular weight polyethylene plate

Abstract

The utility model belongs to the field of plastic extrusion dies, in particular relates to a modified ultra-high molecular weight polyethylene plate extrusion die, and aims to solve the problems that an upper die plate of an existing ultra-high molecular weight polyethylene plate extrusion die can move left and right in the process of adjusting the distance between die plates, so that the die plates are staggered, and the die plates are damaged. In order to solve the problem that product quality is affected in the prior art, according to the scheme, the device comprises a shell, a movable plate and a trapezoidal plate, a fixed plate is fixedly connected in the shell, the movable plate is slidably connected in the shell, and the movable plate is matched with the fixed plate. According to the utility model, through the cooperation of all the parts, the problem that the product quality is influenced due to dislocation between the templates in the process of adjusting the distance between the templates is solved, the extrusion efficiency is higher, the extrusion effect is better, the purpose of stable quality of extruded plates is achieved, and the practicability is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic extrusion dies, in particular to a modified ultra-high molecular weight polyethylene sheet extrusion die. Background Art

[0002] Ultra-high molecular weight polyethylene (UHMW-PE) is a linear thermoplastic engineering plastic with excellent comprehensive performance. Ultra-high molecular weight polyethylene is a polymer compound that is difficult to process, and has super wear resistance, self-lubrication, relatively high strength, stable chemical properties, and strong anti-aging performance. The disadvantages are low heat resistance (heat deformation temperature), poor processing and forming properties, and the outer surface hardness, rigidity, and creep resistance are not as good as general engineering plastics, and the expansion coefficient is relatively large;

[0003] In the prior art, the thickness of the sheet extruded by the same extrusion die is fixed, the function is relatively simple, and the applicability is poor. When it is necessary to produce sheets of different thicknesses, the corresponding extrusion die needs to be replaced. In response to the above problem, the application number is: 202221131915.2 discloses a modified ultra-high molecular weight polyethylene sheet extrusion die, which includes a mounting base, the front and back sides of the mounting base are fixedly connected to support plates, the top of the mounting base and located between the two support plates are fixedly connected to a lower template, the top between the two support plates is fixedly connected to a mounting plate, and the bottom of the mounting plate is provided with an adjustment mechanism, the adjustment mechanism includes a fixed plate, the fixed plate is fixedly connected to the bottom of the mounting plate, and the left side of the fixed plate is rotatably connected to a connecting plate;

[0004] However, after reading the above patent documents, the following problem is found: in the process of adjusting the spacing between the templates, the upper template will move left and right, so that the templates are misaligned, which affects the quality of the product. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes a modified ultra-high molecular weight polyethylene sheet extrusion die.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] The cam is provided with a plurality of movable plates, and the movable plates are provided with a plurality of movable plates, and the movable plates are provided with a plurality of movable plates respectively.

[0008] Specifically, the movable plate and the fixed plate are both provided with slopes, and the two slopes correspond to each other. A variable diameter cavity 1 is formed between the trapezoidal plate and the shell, and a variable diameter cavity 2 is formed between the two slopes. Through the coordinated design of the shell, the trapezoidal plate, the fixed plate, the movable plate and the two slopes, the raw material is subjected to two diameter change treatments, so that the plasticized material is gradually flattened along the variable diameter cavity, so that the extrusion efficiency is higher, the extrusion effect is better, and the purpose of stabilizing the quality of the extruded plate is achieved.

[0009] Specifically, a molding cavity is formed between the lower mold plate and the upper mold plate for hardening and molding the raw material.

[0010] Specifically, two guide rods 1 are fixedly connected to the movable plate, and both of the two guide rods 1 are slidably connected to the shell. One end of the threaded rod is fixedly connected to a rotating plate to facilitate the movement of the movable plate and improve stability.

[0011] Specifically, two guide rods 2 are slidably connected to the shell, and one end of the two guide rods 2 is fixedly connected to the trapezoidal plate to facilitate the sliding of the trapezoidal plate.

[0012] Specifically, a sealing gasket is provided on the trapezoidal plate, and the sealing gasket is slidably connected to the shell, and the shell is provided with a connecting plate to improve the sealing performance.

[0013] Specifically, a groove three is provided on the shell, a scale plate is fixedly installed in the groove three, one end of the scale plate is flush with the top of the fixed plate, and the scale plate is used to facilitate precise adjustment of the distance between the movable plate and the fixed plate.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] (1) The utility model discloses a modified ultra-high molecular weight polyethylene sheet extrusion die. Through the matching design of the shell, the threaded rod, the movable plate and the trapezoidal plate, the distance between the movable plate and the fixed plate can be vertically adjusted, thereby solving the problem that the upper template moves left and right during the process of adjusting the spacing between the templates, thereby causing the templates to be misaligned, which affects the quality of the product.

[0016] (2) The utility model provides a modified ultra-high molecular weight polyethylene sheet extrusion die. Through the coordinated design of the shell, the trapezoidal plate, the fixed plate, the movable plate and the two slopes, the raw material is subjected to two diameter-changing treatments, so that the plasticized material is gradually flattened along with the diameter-changing cavity, so that the extrusion efficiency is higher and the extrusion effect is better, thereby achieving the purpose of stabilizing the quality of the extruded sheet. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following will briefly introduce the drawings required for the implementation or the prior art description. Obviously, the drawings described below are only exemplary, and the structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions that can be implemented in the utility model, so they have no technical substantive significance, and any structural modification, change in proportional relationship or adjustment of size.

[0018] Figure 1 This is a three-dimensional structural schematic diagram of a modified ultra-high molecular weight polyethylene sheet extrusion die proposed by the utility model;

[0019] Figure 2 This is a schematic diagram of the main structural anatomy of a modified ultra-high molecular weight polyethylene sheet extrusion die proposed by the utility model;

[0020] Figure 3 It is a schematic diagram of the structure of the fixed plate and the lower template.

[0021] In the figure: 1. Shell; 2. Fixed plate; 3. Moving plate; 4. Plane bearing; 5. Threaded rod; 6. Trapezoidal plate; 7. Upper template; 8. Lower template; 9. Guide rod 1; 10. Guide rod 2; 11. Variable diameter cavity 1; 12. Variable diameter cavity 2; 13. Forming cavity; 14. Connecting plate; 15. Rotating plate; 16. Scale plate. DETAILED DESCRIPTION

[0022] The following is a specific embodiment of the present invention. People familiar with the technology can easily understand the other advantages and functions of the present invention from the contents disclosed in this specification. Obviously, the described embodiment is a part of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] Reference Figure 1-3 , a modified ultra-high molecular weight polyethylene sheet extrusion die, comprising a shell 1, a movable plate 3 and a trapezoidal plate 6, a fixed plate 2 is fixedly connected in the shell 1, a movable plate 3 is slidably connected in the shell 1, the movable plate 3 is adapted to the fixed plate 2, one end of the movable plate 3 is fixedly connected to the trapezoidal plate 6, the trapezoidal plate 6 is slidably connected to the shell 1, a plane bearing 4 is fixedly connected to the top of the movable plate 3, a threaded rod 5 is fixedly connected to one side of the plane bearing 4, the threaded rod 5 is threadedly connected to the shell 1, a groove 1 is provided on the movable plate 3, an upper template 7 is provided in the groove 1, a groove 2 is provided on the fixed plate 2, a lower template 8 is provided in the groove 2, the upper template 7 corresponds to the lower template 8, through the matching design of the shell 1, the threaded rod 5, the movable plate 3 and the trapezoidal plate 6, the distance between the movable plate 3 and the fixed plate 2 can be vertically adjusted, thereby solving the problem that the upper template moves left and right in the process of adjusting the spacing between the templates, thereby causing misalignment between the templates, and affecting the quality of the product.

[0024] In this embodiment, slopes are provided on the movable plate 3 and the fixed plate 2, and the two slopes correspond to each other. A variable diameter cavity 11 is formed between the trapezoidal plate 6 and the shell 1, and a variable diameter cavity 2 12 is formed between the two slopes. Through the coordinated design of the shell 1, the trapezoidal plate 6, the fixed plate 2, the movable plate 3 and the two slopes, the raw material is subjected to two diameter change treatments, so that the plasticized material is gradually flattened along the variable diameter cavity, so that the extrusion efficiency is higher, the extrusion effect is better, and the purpose of stable quality of the extruded plate is achieved.

[0025] In this embodiment, a molding cavity 13 is formed between the lower mold plate 8 and the upper mold plate 7 for hardening and molding the raw material.

[0026] In this embodiment, two guide rods 9 are fixedly connected to the movable plate 3, and the two guide rods 9 are both slidably connected to the shell 1. One end of the threaded rod 5 is fixedly connected to a rotating plate 15 to facilitate the movement of the movable plate 3 and improve stability.

[0027] In this embodiment, two guide rods 2 10 are slidably connected to the housing 1 , and one end of the two guide rods 2 10 is fixedly connected to the trapezoidal plate 6 to facilitate the sliding of the trapezoidal plate 6 .

[0028] In this embodiment, a sealing gasket is provided on the trapezoidal plate 6, and the sealing gasket is slidably connected to the housing 1. The housing 1 is provided with a connecting plate 14 to improve the sealing performance.

[0029] In this embodiment, a groove three is opened on the shell 1, and a scale plate 16 is fixedly installed in the groove three. One end of the scale plate 16 is flush with the top of the fixed plate 2. The scale plate 16 facilitates the precise adjustment of the distance between the movable plate 3 and the fixed plate 2.

[0030] Working principle: When in use, the device is fixedly connected to the outlet of the extruder, and the plastic raw material enters the diameter-changing cavity 11 formed by the shell 1 and the trapezoidal plate 6 from the outlet of the extruder, thereby achieving the first diameter-changing treatment of the raw material, and then the raw material enters the diameter-changing cavity 12 formed by the two slopes, thereby achieving the second diameter-changing treatment of the raw material, and then the raw material enters the molding cavity 13 formed by the upper template 7 and the lower template 8, and the material in the molding cavity is cooled to harden the plate. Through the two diameter-changing treatments of the raw material, the plasticized material is gradually flattened along with the diameter-changing cavity, so that the extrusion efficiency is higher and the extrusion is more efficient. The effect is better, and the purpose of stabilizing the quality of the extruded plate is achieved; the threaded rod 5 and the feeding thread of the shell 1 are transmitted by rotating the rotating plate 15, and at the same time, the threaded rod 5 drives the movable plate 3 to move and slide in the shell 1 through the transmission of the plane bearing 4, and at the same time, the movable plate 3 drives the trapezoidal plate 6 to slide synchronously in the shell 1, so as to achieve the purpose of adjusting the distance between the movable plate 3 and the fixed plate 2, and also realize the size adjustment of the variable diameter cavity 1 11 and the variable diameter cavity 2 12; the distance between the movable plate 3 and the fixed plate 2 is convenient to be accurately adjusted through the action of the scale plate 16.

[0031] The technical progress achieved by the utility model compared with the prior art is that: through the cooperation of various components, not only the problem of misalignment between the templates during the process of adjusting the spacing between the templates, which affects the quality of the product, but also the extrusion efficiency is higher and the extrusion effect is better, so as to achieve the purpose of stabilizing the quality of the extruded plate and the practicability is higher.

Claims

1. A modified ultra-high molecular weight polyethylene sheet extrusion die, characterized in that: The invention comprises a shell (1), a movable plate (3) and a trapezoidal plate (6); a fixed plate (2) is fixedly connected inside the shell (1); a movable plate (3) is slidably connected inside the shell (1); the movable plate (3) is adapted to the fixed plate (2); one end of the movable plate (3) is fixedly connected to the trapezoidal plate (6); the trapezoidal plate (6) is slidably connected to the shell (1); a plane bearing (4) is fixedly connected to the top of the movable plate (3); a threaded rod (5) is fixedly connected to one side of the plane bearing (4); the threaded rod (5) is threadedly connected to the shell (1); a groove 1 is provided on the movable plate (3); an upper template (7) is provided in the groove 1; a groove 2 is provided on the fixed plate (2); a lower template (8) is provided in the groove 2; the upper template (7) corresponds to the lower template (8).

2. A modified ultra-high molecular weight polyethylene sheet extrusion die according to claim 1, characterized in that: The movable plate (3) and the fixed plate (2) are both provided with slopes, the two slopes correspond to each other, a first diameter-changing cavity (11) is formed between the trapezoidal plate (6) and the housing (1), and a second diameter-changing cavity (12) is formed between the two slopes.

3. A modified ultra-high molecular weight polyethylene sheet extrusion die according to claim 1, characterized in that: A molding cavity (13) is formed between the lower mold plate (8) and the upper mold plate (7).

4. The modified ultra-high molecular weight polyethylene sheet extrusion die according to claim 1, characterized in that: Two guide rods (9) are fixedly connected to the movable plate (3), and the two guide rods (9) are slidably connected to the housing (1). One end of the threaded rod (5) is fixedly connected to a rotating plate (15).

5. The modified ultra-high molecular weight polyethylene sheet extrusion die according to claim 1, characterized in that: The housing (1) is slidably connected to two guide rods (10), and one end of the two guide rods (10) is fixedly connected to the trapezoidal plate (6).

6. The modified ultra-high molecular weight polyethylene sheet extrusion die according to claim 1, characterized in that: A sealing gasket is provided on the trapezoidal plate (6), the sealing gasket is slidably connected to the shell (1), and the shell (1) is provided with a connecting plate (14).

7. The modified ultra-high molecular weight polyethylene sheet extrusion die according to claim 1, characterized in that: A groove three is provided on the housing (1), a scale plate (16) is fixedly installed in the groove three, and one end of the scale plate (16) is flush with the top of the fixed plate (2).

Images