Extrusion device for processing polymer sheet

Abstract

The application belongs to the field of polymer extrusion equipment, and particularly relates to an extrusion device for polymer sheet processing. The specific technical scheme is as follows: the forming die comprises an upper die seat and an upper lip die arranged on the upper die seat; a screw rod is rotatably arranged on the upper die seat; an extrusion block is arranged on the screw rod; an upper lip die is arranged on the upper die seat below the screw rod; the upper lip die is connected to the upper die seat through an elastic component; the upper lip die is provided with a first groove with an inner bottom inclined surface at the top, which is matched with the lower end of the extrusion block; the length direction of the inner bottom inclined surface of the first groove is consistent with the length direction of the screw rod; and the lower end of the extrusion block is in abutment with the inner bottom of the first groove. After long-time work, the polymer material continuously extrudes the upper lip die in the vertical direction in the forming die, and the rotating direction of the screw rod is in the horizontal direction, so that the sliding of the upper lip die on the upper die seat under the extrusion force of the polymer material can be effectively avoided, and the yield of the sheet product is affected.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of high polymer extrusion equipment, and particularly relates to an extrusion device for high polymer sheet processing. BACKGROUND

[0002] Extrusion molding is a common and very important production process in high polymer material processing, and has the characteristics of high efficiency, continuity and low cost, and mainly uses an extrusion device. The extrusion device mainly comprises a screw, a barrel and a mold, and its working process is that, by means of the extrusion of the screw, the high polymer material which is heated and melted is pushed by the extrusion force to pass through the die head mold and is formed into a continuous profile material with a constant cross section. The production of high polymer sheets, high polymer tubes and high polymer rods with different shapes mainly depends on different molds.

[0003] Most of the existing extrusion devices for high polymer sheet processing can only produce one type of sheet, or need to replace different molds to produce different types of sheets. The former can only produce one type of sheet, and has poor applicability. The latter can produce different types of sheets, but needs multiple molds, which not only increases the processing cost, but also increases the management difficulty of multiple molds when multiple types of sheets need to be produced.

[0004] Therefore, if an extrusion device for high polymer sheet processing can produce multiple types of sheets with a single mold, it will have superior industrial application prospects. SUMMARY

[0005] To solve the technical problems in the background art, the purpose of the present application is to provide an extrusion device for high polymer sheet processing.

[0006] To achieve the above-mentioned purpose of the application, the technical scheme adopted by the present application is as follows: an extrusion device for high polymer sheet processing, comprising an extruder and a forming mold connected with the extruder, the forming mold comprising an upper mold base and an upper lip mold arranged on the upper mold base, a screw being rotatably arranged on the upper mold base, an extrusion block being arranged on the screw, an upper lip mold being arranged on the upper mold base below the screw, the upper lip mold being connected with the upper mold base through an elastic component, a first groove being arranged on the top of the upper lip mold and being adapted to the lower end of the extrusion block, the inner bottom of the first groove being inclined, the length direction of the inclined surface of the inner bottom of the first groove being consistent with the length direction of the screw, and the lower end of the extrusion block abutting against the inner bottom of the first groove.

[0007] Preferably, a limiting rod is arranged on the upper mold base along the length direction of the screw, and the extrusion block passes through the limiting rod and slides on the limiting rod.

[0008] Preferably, the elastic assembly comprises a connecting block arranged on the upper die lip side wall, the upper die seat is provided with a second groove which is adapted to the connecting block and is perpendicular to the length direction of the lead screw, a first compression spring is arranged in the second groove, and the other end of the first compression spring is connected with the connecting block.

[0009] Preferably, one end of the lead screw extends out of the upper die seat and is connected with a control assembly, the control assembly comprises a coarse control assembly and a fine control assembly, the coarse control assembly comprises a first disc connected with the lead screw, and a circular ring is connected with the first disc through a connecting rod at the periphery of the first disc.

[0010] Preferably, a circular baffle is arranged on the periphery of the first disc, the circular baffle and the first disc enclose a "[ ]" shaped accommodating groove, the fine control assembly comprises a rotating shaft connected with the first disc through an adjusting assembly, a first gear is fixedly arranged on the rotating shaft, and an inner tooth is arranged on the inner side of the circular baffle and is engaged with the first gear.

[0011] The adjusting assembly fixes the rotating shaft with the first disc, and the first gear rotates together with the first disc, or the adjusting assembly makes the rotating shaft rotate relative to the first disc.

[0012] Preferably, a third groove is arranged on the side of the first disc which faces the first gear, the adjusting assembly comprises a fourth groove which is arranged on the circumferential side wall of the rotating shaft, a second compression spring is arranged in the fourth groove, a limiting block is arranged at the other end of the second compression spring, a limiting groove which is adapted to the limiting block is arranged on the side wall of the third groove, and an electromagnet is arranged on the bottom of the fourth groove.

[0013] When the electromagnet is powered on, the limiting block extrudes the second compression spring and is completely retracted into the fourth groove; when the electromagnet is powered off, part of the limiting block is located in the fourth groove, and the other part extends into the limiting groove, and the second compression spring is always in a compressed state.

[0014] Preferably, a cover plate is arranged on the side of the circular baffle which is away from the first disc, and a rotating wheel is connected with the end of the rotating shaft which is away from the adjusting assembly and penetrates through the cover plate.

[0015] Preferably, a fixing assembly is further arranged on the upper die seat, the fixing assembly comprises a fixing plate which is sleeved on the lead screw, a plurality of through holes are arranged in a circular array on the fixing plate, a fixing groove which is adapted to the through holes is arranged on the side wall of the upper die seat which faces the control assembly, and a fixing rod is inserted into the through holes and the fixing groove.

[0016] Preferably, the extruder is a single-screw extruder driven by a first motor, and the extruder is communicated with the forming die through a connecting part, and a variable-diameter part with gradually decreasing cavity diameter is arranged in the connecting part.

[0017] Preferably, a guiding assembly and an extruding assembly are sequentially arranged downstream of the forming die, the guiding assembly guides the sheet material at the outlet of the forming die to the extruding assembly, the guiding assembly is two rotatable guiding cylinders, the sheet material is guided through an 'S' route to enter the extruding assembly, and the extruding assembly is a pair of cooperating extruding rollers, and a sheet thickness detector is arranged at the outlet end of the extruding rollers.

[0018] The present application has the following beneficial effects:

[0019] By arranging a screw rod on the upper die holder, arranging an extruding block on the screw rod, connecting the upper lip die with the upper die holder through the elastic assembly, arranging a first groove with an inner bottom inclined surface on the top of the upper lip die and matching the lower end of the extruding block, and arranging the length direction of the inclined surface of the inner bottom of the first groove to be consistent with the length direction of the screw rod, and arranging the lower end of the extruding block to abut against the inner bottom of the first groove, rotating the screw rod, moving the extruding block along the length direction of the screw rod, moving the bottom of the extruding block along the higher direction of the inclined surface due to the inclined surface of the inner bottom of the first groove, and continuously extruding the upper lip die downward during the movement of the extruding block, at this time, the elastic assembly is contracted, the upper lip die is gradually moved downward in the cavity of the upper die holder, the distance between the upper lip die and the lower lip die is reduced, and thus the thickness of the sheet material is adjusted. Even after long time work, the high polymer material continuously extrudes the upper lip die upward in the vertical direction in the forming die, and the rotating direction of the screw rod is in the horizontal direction, which can effectively avoid the sliding of the upper lip die on the upper die holder under the extrusion force of the high polymer material, and affect the yield of the sheet material. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a top view schematic diagram of the extruding device of the present application;

[0021] Figure 2 It is a top view schematic diagram of the extruding device of the present application; Figure 1

[0022] Figure 3 It is a top view schematic diagram of the extruding device of the present application; Figure 2

[0023] It is a sectional view schematic diagram of the control assembly of the present application; Figure 4

[0024] It is a sectional view schematic diagram of the control assembly of the present application; Figure 5 Figure 4

[0025] Figure 6 It is a sectional view schematic diagram of the control assembly of the present application; ​​​

[0026] Figure 7 This is a schematic diagram of the fixing plate structure of the present invention.

[0027] In the diagram: 1. First motor; 2. Feed hopper; 3. Extruder; 4. Connecting part; 5. First base; 6. Second base; 7. Guide cylinder; 8. Extrusion roller; 9. Thickness detector; 10. Second motor; 11. Adjusting bolt; 12. Lower die base; 13. Upper die base; 14. Lower lip die; 15. Upper lip die; 16. Lead screw; 17. Extrusion block; 18. First groove; 19. Limiting rod; 20. Cavity; 21. Connecting block; 22. First compression spring; 23. Second groove; 24. Fixing plate; 25. Fixing rod; 26. Rotating shaft; 27. Rotating wheel; 28. Circular baffle; 29. ​​Ring; 30. Connecting rod; 31. First disc; 32. Receiving groove; 33. First gear; 34. Second compression spring; 35. Limiting block; 36. Limiting groove; 37. Fourth groove; 38. Electromagnet; 39. Through hole; 40. Cover plate. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Unless otherwise specified, the technical means used in the embodiments are conventional means well known to those skilled in the art.

[0029] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0030] like Figures 1-7 As shown, an extrusion device for processing polymer sheets includes an extruder 3 and a forming die connected to the extruder 3. The distance between the upper lip die 15 and the lower lip die 14 of the forming die is adjustable. The polymer raw material to be processed enters the extruder 3 from the feed hopper 2. After being heated and melted in the extruder 3, the polymer raw material enters the forming die and is processed into a sheet shape. The forming die of this invention can adjust the distance between the upper lip die 15 and the lower lip die 14, thereby producing sheets of different thicknesses. Different types of sheets can be produced without changing different types of dies, making it highly adaptable. It is especially suitable for occasions that require the production of sheets of various thicknesses, reducing the cost of purchasing dies and eliminating the need for frequent die changes.

[0031] like Figure 3As shown, the forming die comprises an upper die seat 13 and a lower die seat 12, and an upper lip die 15 and a lower lip die 14 are arranged on the upper die seat 13 and the lower die seat 12 respectively. In the device, the position of the lower lip die 14 remains unchanged, and only the position of the upper lip die 15 on the upper die seat 13 is changed to change the distance between the two lip dies and adapt to different thicknesses. The upper die seat 13 is provided with a cavity 20 with an opening downward, and the upper lip die 15 is arranged in the cavity 20 in a sliding manner. A lead screw 16 is arranged on the upper die seat 13 and rotates above the cavity 20. The lead screw 16 is rotatably arranged at both ends of the upper die seat 13. The lead screw 16 is provided with an extrusion block 17 that can move along the length direction of the lead screw 16. The upper lip die 15 is arranged below the lead screw 16. The upper lip die 15 is provided with a first groove 18 with an inner bottom inclined surface that is adapted to the lower end of the extrusion block 17. The length direction of the inclined surface of the inner bottom of the first groove 18 is consistent with the length direction of the lead screw 16, and the lower end of the extrusion block 17 abuts against the inner bottom of the first groove 18.

[0032] It should be noted that the lower end of the extrusion block 17 always abuts against the inclined surface of the inner bottom of the first groove 18. In order to achieve this purpose, the upper lip die 15 and the upper die seat 13 are connected by an elastic component, which always extrudes the upper lip die 15 upward. The extrusion block 17 extrudes the upper lip die 15 downward, and the elastic component extrudes the upper lip die 15 upward to fix the upper lip die 15 on the upper die seat 13.

[0033] Adjusting the distance between the upper lip die 15 and the lower lip die 14: in the thickness reduction working condition, the lead screw 16 is rotated, and the extrusion block 17 moves along the length direction of the lead screw 16. Since the inner bottom of the first groove 18 is inclined, the bottom of the extrusion block 17 moves along the higher direction of the inclined surface. During the movement of the extrusion block 17, the upper lip die 15 is constantly extruded downward, and at this time, the elastic component is contracted, and the upper lip die 15 gradually moves downward in the cavity 20 of the upper die seat 13, thereby reducing the distance between the upper lip die 15 and the lower lip die 14. In the thickness increase working condition, the lead screw 16 is rotated in the opposite direction, and the extrusion block 17 moves along the length direction of the lead screw 16. Since the inner bottom of the first groove 18 is inclined, the bottom of the extrusion block 17 moves along the lower direction of the inclined surface. Under the action of the rebound force of the elastic component, during the movement of the extrusion block 17, the upper lip die 15 gradually moves upward in the cavity 20 of the upper die seat 13, thereby increasing the distance between the upper lip die 15 and the lower lip die 14.

[0034] The device can effectively avoid the sliding of the upper lip mold 15 on the upper mold base 13 under the extrusion force of the polymer material, which affects the yield of the sheet product. The thickness adjusting assembly of the prior art upper lip mold 15 is adjusted in the vertical direction, and when the polymer material extrudes the upper lip mold 15, the upper lip mold 15 may be pushed upward or loosened.

[0035] In order to limit the movement of the extrusion block 17 along the length direction of the lead screw 16, a limiting rod 19 is arranged on the upper mold base 13 along the length direction of the lead screw 16, and the extrusion block 17 passes through and slides on the limiting rod 19. When the lead screw 16 rotates, the extrusion block 17 moves on the lead screw 16, and the extrusion block 17 slides on the limiting rod 19.

[0036] The elastic assembly includes a connecting block 21 arranged on the side wall of the upper lip mold 15, a second groove 23 in the shape of "┌" which is perpendicular to the length direction of the lead screw 16 is arranged on the inner side wall of the cavity 20 of the upper mold base 13 and matches the connecting block 21, a first compression spring 22 is fixedly arranged in the second groove 23, one end of the first compression spring 22 is connected with the connecting block 21, and the first compression spring 22 is always in a compressed state. The shape of the connecting block 21 matches the shape of the second groove 23.

[0037] One end of the lead screw 16 extends out of the upper mold base 13 and is connected with a control assembly, the control assembly includes a coarse adjustment control assembly and a fine adjustment control assembly, the coarse adjustment control assembly preliminarily adjusts the position of the upper lip mold 15 on the upper mold base 13, and the fine adjustment control assembly finely adjusts the position of the upper lip mold 15.

[0038] Specifically, the coarse adjustment control assembly includes a first disc 31 connected with the lead screw 16, and a circular ring 29 is connected with the first disc 31 through a connecting rod 30. When adjusting, the circular ring 29 is rotated to rotate the lead screw 16, and the position of the upper lip mold 15 is adjusted.

[0039] Specifically, a circular baffle 28 is fixedly arranged on the periphery of the first disc 31, the thickness of the first disc 31 is smaller than the thickness of the circular baffle 28, that is, the circular baffle 28 and the first disc 31 form a "[ ]" shaped accommodating groove 32. The fine adjustment assembly includes a rotating shaft 26 connected with the first disc 31 through an adjusting assembly, a first gear 33 is fixedly arranged on the rotating shaft 26, that is, the first gear 33 moves together with the rotating shaft 26, and an inner tooth is arranged on the inner side of the circular baffle 28 and engages with the first gear 33. It should be noted that the diameter of the circle where the top of the teeth of the first gear 33 is located is smaller than the diameter of the circle where the top of the inner tooth of the circular baffle 28 is located.

[0040] The adjusting assembly has two working states. In one working state, when the thickness is preliminarily adjusted, the rotating shaft 26 is fixed with the first disc 31, and when the first disc 31 rotates, the first gear 33 rotates with the first disc 31 and no relative movement occurs. In another working state, when the thickness is finely adjusted, the adjusting assembly makes the rotating shaft 26 not fixed with the first disc 31, that is, the rotating shaft 26 and the first disc 31 can rotate simultaneously and do not affect each other, that is, the rotating shaft 26 drives the first gear 33 to rotate, the first gear 33 drives the circular baffle 28 meshing with the first gear 33 to rotate, that is, drives the first disc 31 to rotate. Since the diameter of the first gear 33 is smaller than the diameter of the inner teeth of the circular baffle 28, when the first gear 33 rotates 1, 2, 3 or more circles, the circular baffle 28 rotates only one circle, that is, the screw rod 16 rotates one circle, and the distance between the upper lip die 15 and the lower lip die 14 can be finely controlled.

[0041] Specifically, the side of the first disc 31 facing the first gear 33 is provided with a third groove, the adjusting assembly comprises a fourth groove 37 opened on the circumferential side wall of the rotating shaft 26, the fourth groove 37 is provided with a second compression spring 34, the other end of the second compression spring 34 is provided with a limiting block 35, the side wall of the third groove is provided with a limiting groove 36 matched with the limiting block 35, and the bottom of the fourth groove 37 is provided with an electromagnet 38. When the electromagnet 38 is powered on, under the action of magnetic force, the limiting block 35 extrudes the second compression spring 34 and completely retracts into the fourth groove 37, and the rotating shaft 26 can rotate relative to the first disc 31. When the electromagnet 38 is powered off, under the action of the rebound force of the second compression spring 34, the limiting block 35 is partially located in the fourth groove 37 and partially extends into the limiting groove 36, fixing the rotating shaft 26 and the first disc 31, and the second compression spring 34 is always in a compressed state.

[0042] Further, in order to prevent dust and the like from entering the containing groove 32, the side of the circular baffle 28 away from the first disc 31 is provided with a cover plate 40, and the end of the rotating shaft 26 away from the adjusting assembly is connected with a rotating wheel 27 penetrating through the cover plate 40. When adjusting, the rotating wheel 27 is manually rotated to drive the first gear 33 to rotate, thereby driving the circular baffle 28 to rotate.

[0043] Further, after adjusting the thickness, in order to prevent the distance between the upper lip mold 15 and the lower lip mold 14 from changing, a fixing assembly is further arranged on the upper mold base 13, which is used to fix the position of the upper lip mold 15 on the upper mold base 13. The fixing assembly includes a fixing plate 24 fixedly sleeved on the lead screw 16, and a plurality of through holes 39 are arranged in a circular array on the fixing plate 24. A fixing groove matched with the through holes 39 is arranged on the side wall of the upper mold base 13 facing the control assembly, and a fixing rod 25 is inserted into the through holes 39 and the fixing groove. When adjusting the thickness, the fixing rod 25 is taken out of the through holes 39 and the fixing groove, and the fixing plate 24 rotates together with the lead screw 16; after the adjustment is completed, the fixing rod 25 is inserted into the through holes 39 and the fixing groove, so that the lead screw 16 is fixed on the upper mold base 13, and no relative displacement occurs between the two. It should be noted that the shape of the through hole 39 can be other shapes except circular, such as square hole, triangular hole, hexagonal hole, etc.

[0044] Specifically, 10 through holes 39 are arranged in a uniform array on the fixing plate 24, and the arc length between two adjacent through holes 39 is d. With the center of the adjacent two through holes 39 as the starting point, the distance between the upper lip mold 15 and the lower lip mold 14 changes by 0.1 mm every time the through holes 39 of the fixing plate 24 rotate by d length. The number of fixing grooves can be one, or greater than or equal to two and less than or equal to the number of through holes 39.

[0045] As shown in Figure 2 The extruder 3 is a single-screw extruder 3 driven by the first motor 1, the extruder 3 is communicated with the forming mold through the connecting part 4, and the connecting part 4 is provided with a variable diameter part with a gradually decreasing cavity diameter. By arranging the variable diameter part, the sharp change of pressure is avoided, and the generation of bubbles in the forming mold can be prevented.

[0046] As shown in Figure 1 and 2 In order to further ensure the thickness yield of the sheet, a guiding assembly and an extrusion assembly are further arranged downstream of the forming mold in sequence. The guiding assembly guides the sheet at the outlet of the forming mold to the extrusion assembly for continuous extrusion molding, so that the sheet at the discharge end of the extrusion assembly meets the thickness requirement of the sheet. The guiding assembly is two guiding cylinders 7 rotatably arranged on the first base 5, and the sheet at the outlet of the forming mold enters the extrusion assembly after being guided through an “S” route. The extrusion assembly is a pair of cooperating extrusion rollers 8, and one of the extrusion rollers 8 is driven to rotate by the second motor 10. The extrusion rollers 8 are rotatably arranged on the second base 6, and the second base 6 is provided with an adjusting bolt 11 for adjusting the distance between the two extrusion rollers 8. The extrusion roller 8 is provided with a sheet thickness detector 9 at the discharge end. The extrusion assembly extrudes the sheet, so that the thickness of the sheet meets the process requirement.

[0047] The above described embodiments are only to illustrate the preferred modes of the present application, and are not intended to limit the scope of the present application. Any modification, variation, modification, and replacement of the technical solutions of the present application made by those skilled in the art without departing from the design spirit of the present application shall fall within the protection scope determined by the claims of the present application.

Claims

1. An extrusion device for processing a high molecular sheet material, comprising an extruder (3) and a molding die connected to the extruder (3), characterized in that: The forming die comprises an upper die seat (13) and an upper lip die (15) arranged on the upper die seat (13), a screw rod (16) is arranged on the upper die seat (13) in rotation, an extrusion block (17) is arranged on the screw rod (16), the upper lip die (15) is connected with the upper die seat (13) through an elastic assembly, a first groove (18) with a bottom inclined surface is arranged on the top of the upper lip die (15) and is matched with the lower end of the extrusion block (17), the length direction of the bottom inclined surface in the first groove (18) is consistent with the length direction of the screw rod (16), and the lower end of the extrusion block (17) abuts against the bottom of the first groove (18); A limiting rod (19) is arranged on the upper die seat (13) along the length direction of the screw rod (16), and the extrusion block (17) penetrates through the limiting rod (19) and slides on the limiting rod (19); The elastic assembly comprises a connecting block (21) arranged on the side wall of the upper lip die (15), a second groove (23) matched with the connecting block (21) and perpendicular to the length direction of the screw rod (16) is arranged on the upper die seat (13), a first compression spring (22) is arranged in the second groove (23), the other end of the first compression spring (22) is connected with the connecting block (21), and the first compression spring (22) is always in a compressed state; One end of the screw rod (16) extends out of the upper die seat (13) and is connected with a control assembly, the control assembly comprises a coarse adjustment control assembly and a fine adjustment control assembly, the coarse adjustment control assembly comprises a first disc (31) connected with the screw rod (16), and a circular ring (29) is connected with the first disc (31) through a connecting rod (30) on the periphery of the first disc (31); A circular baffle (28) is arranged on the periphery of the first disc (31), the circular baffle (28) and the first disc (31) form a "[”-shaped accommodating groove (32), the fine adjustment control assembly comprises a rotating shaft (26) connected with the first disc (31) through an adjusting assembly, a first gear (33) is fixedly arranged on the rotating shaft (26), and an inner tooth is arranged on the inner side of the circular baffle (28) and is engaged with the first gear (33); The adjusting assembly fixes the rotating shaft (26) with the first disc (31), the first gear (33) rotates together with the first disc (31), or the adjusting assembly makes the rotating shaft (26) rotate relative to the first disc (31).

2. The extrusion device for processing a polymer sheet according to claim 1, wherein: A third groove is arranged on the side of the first disc (31) facing the first gear (33), the adjusting assembly comprises a fourth groove (37) arranged on the circumferential side wall of the rotating shaft (26), a second compression spring (34) is arranged in the fourth groove (37), a limiting block (35) is arranged at the other end of the second compression spring (34), a limiting groove (36) matched with the limiting block (35) is arranged on the side wall of the third groove, and an electromagnet (38) is arranged on the bottom in the fourth groove (37); When the electromagnet (38) is powered on, the limiting block (35) extrudes the second compression spring (34) and is completely retracted into the fourth groove (37); when the electromagnet (38) is powered off, the limiting block (35) is partially located in the fourth groove (37) and partially extends into the limiting groove (36), and the second compression spring (34) is always in a compressed state.

3. The extrusion device for processing a polymer sheet according to claim 2, wherein: The side, away from the first disc (31), of the circular baffle (28) is provided with a cover plate (40), and the end, away from the adjusting assembly, of the rotating shaft (26) is connected with a rotating wheel (27) penetrating through the cover plate (40).

4. The extrusion device for processing a polymer sheet according to claim 1, wherein: The upper die seat (13) is further provided with a fixing assembly, the fixing assembly comprises a fixing plate (24) sleeved on the lead screw (16), a plurality of through holes (39) are circularly arranged on the fixing plate (24), a fixing groove matched with the through holes (39) is arranged on the side wall of the upper die seat (13) facing the control assembly, and a fixing rod (25) is inserted into the through holes (39) and the fixing groove.

5. The extrusion device for processing a polymer sheet according to claim 1, wherein: The extruder (3) is a single-screw extruder driven by the first motor (1), the extruder (3) is communicated with the forming die through a connecting part (4), and the connecting part (4) is provided with a variable-diameter part with a gradually decreasing cavity diameter.

6. The extrusion device for processing a polymer sheet according to claim 1, wherein: A guiding assembly and an extruding assembly are sequentially arranged downstream of the forming die, the guiding assembly guides the sheet material at the outlet of the forming die to the extruding assembly, the guiding assembly comprises two rotatable guiding cylinders (7), the sheet material guided by the forming die through an "S" route enters the extruding assembly, the extruding assembly comprises a pair of cooperating extruding rollers (8), and the extruding roller (8) is provided with a sheet thickness detector (9) at the discharging end.

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