Production line for plastic sheet processing and production method thereof

Abstract

The invention belongs to the technical field of plastic forming, and relates to a production line for plastic sheet processing and a production method thereof. The production line for processing the plastic sheets comprises a workbench and a clamping assembly, wherein the workbench is used for flatly laying plastic raw materials; a material roller is arranged at one end of each workbench, a machining assembly is arranged on one side of each workbench, the number of the workbenches is two, two threaded rods parallel to each other are rotationally installed on the supporting frame, and nuts are connected to the threaded rods in a threaded mode. One end of each threaded rod is rotationally connected with a rotating shaft, the two clamping assemblies are the first clamping assembly and the second clamping assembly respectively, and two pressing blocks in the first clamping assembly are fixedly connected with two nuts respectively; the two pressing blocks in the second clamping assembly are fixedly connected with the two fixing blocks correspondingly. And the first clamping assembly and the second clamping assembly are alternately matched with the first workbench and the second workbench, so that the plastic raw materials on the first workbench can be conveniently processed by the processing assembly, the processing quality is favorably ensured, and the production efficiency is favorably improved.

Description

Technical Field

[0001] The invention belongs to the technical field of plastic molding, and relates to a production line for processing plastic sheets and a production method thereof. Background Art

[0002] Plastic sheets refer to materials used to produce disposable plastic cups, plates, bowls, dishes, boxes and other thermoformed products. Among them, blister forming is a common plastic sheet processing technology. The main principle is to heat and soften the plastic sheet, then use vacuum adsorption on the mold surface, and then cool it to form. It is widely used in plastic packaging, lighting, advertising, decoration and other industries.

[0003] The general process of the blister process includes cutting of plastic sheets, sheet fixing, heating, molding, demoulding, edge removal and completion of finished products. During blistering, plastic raw materials are usually placed in rolls, and the plastic raw materials are pulled by the pulling equipment. The other end of the plastic is recycled by the recycling roller. The conventional pulling equipment has two clamping devices, which clamp the two sides of the plastic and then move it. After moving to the specified position, the two sides of the plastic are released, reset and clamped again, and then moved, reciprocating operation, but during the period of loosening and resetting, the plastic may be squeezed by the cutting operation, causing the plastic to be pulled, resulting in errors in the subsequent pulling spacing, which reduces the cutting accuracy.

[0004] In order to solve the above problems, the present invention provides a production line and a production method for processing plastic sheets. Summary of the invention

[0005] In order to solve the problems existing in the background technology, the present invention proposes a production line for processing plastic sheets and a production method thereof.

[0006] In order to achieve the above-mentioned purpose, the technical scheme adopted by the present invention is as follows: a production line for processing plastic sheets, comprising a workbench for flattening plastic raw materials and a clamping assembly; a material roller is arranged at one end of the workbench, a processing assembly is arranged at one side of the workbench, there are two workbenches, a support frame is arranged between the two workbenches, two threaded rods parallel to each other are rotatably mounted on the support frame, and nuts are threadedly connected to the threaded rods; one end of each threaded rod is rotatably connected to a rotating shaft, and a fixed block is connected and installed on the rotating shaft through a plug-in assembly; the clamping assembly is connected to the support frame, the clamping assembly has two groups, namely a first clamping assembly and a second clamping assembly, and each group of clamping assemblies includes two pressing blocks; wherein the two pressing blocks in the first clamping assembly are respectively fixedly connected to the two nuts; the two pressing blocks in the second clamping assembly are respectively fixedly connected to the two fixed blocks; The two threaded rods rotate in opposite directions, and a reversing assembly is provided between the threaded rod and the rotating shaft, so that the rotating shaft rotates in opposite directions to the corresponding threaded rod; when the threaded rod rotates, the corresponding rotating shaft rotates in the opposite direction, and the pressing block rotates, thereby causing the pressing block to move from one workbench to another workbench, and the pressing block clamps the plastic raw material on the workbench, and then as the threaded rod rotates, the two pressing blocks in the first clamping assembly move along the threaded rod, thereby pulling the plastic raw material on the corresponding workbench, and at the same time, the processing assembly processes the plastic raw material on the workbench that cooperates with the second clamping assembly.

[0007] Furthermore, a first motor is installed on the support frame, and the motor shaft of the first motor is coaxially fixedly connected to one of the threaded rods, a first gear is coaxially fixedly installed on one of the threaded rods, and a second gear is coaxially fixedly installed on the other threaded rod, and the first gear is meshed with the second gear.

[0008] Furthermore, the nut is slidably connected with a connecting block, and a first spring is fixedly connected between the connecting block and the second nut, and the connecting block is threadedly connected to the threaded rod.

[0009] Furthermore, the plug-in assembly includes a second spring and a card block, a limiting groove is provided on the rotating shaft, the card block is slidably arranged in the limiting groove, the second spring is fixedly connected between the card block and the end wall of the limiting groove, an installation groove is provided on the fixed block, and a plurality of card slots cooperating with the card block are provided on the inner wall of the installation groove, and inclined surfaces are provided on both sides of one end of the card block cooperating with the card slot.

[0010] Furthermore, the reversing assembly includes a chain, a third gear and a fourth gear; one of the threaded rods is coaxially fixedly connected to the first sprocket, and the second sprocket is coaxially fixedly installed on the rotating shaft connected to the other threaded rod, and the chain is wound between the first sprocket and the second sprocket; the third gear and the fourth gear are coaxially fixedly connected to the two rotating shafts respectively.

[0011] Furthermore, a processing assembly is provided on one side of each of the workbenches, a through hole is opened on the workbench, the processing assembly is arranged above the through hole, a collection box is arranged below the through hole, and the processing assembly includes a fixed plate; the fixed plate is arranged above the through hole for up and down movement, and a cutting knife is arranged at the lower end of the fixed plate.

[0012] Furthermore, a push plate is provided on the lower end surface of the fixing plate for vertical movement.

[0013] Furthermore, limit plates are provided on both sides of the workbench.

[0014] The production method of a production line for processing plastic sheets in the present invention comprises the following specific steps: S1, the two workbenches are respectively the first workbench and the second workbench; initially, the first clamping assembly cooperates with the second workbench, and the two pressing blocks in the first clamping assembly clamp the plastic raw material on the second workbench; the second clamping assembly cooperates with the first workbench, and the two pressing blocks in the second clamping assembly clamp the plastic raw material on the first workbench; S2, the threaded rod is rotated, and the threaded rod drives the pressure block in the first clamping assembly to rotate, so that the first clamping assembly cooperates with the first workbench; at the same time, the threaded rod drives the rotating shaft to rotate through the reversing assembly, and the rotating shaft drives the pressure block in the second clamping assembly to rotate, so that the second clamping assembly cooperates with the second workbench; S3, then, the material roller on the first workbench rotates to discharge the material, the first clamping assembly pulls the plastic raw material on the first workbench to move, and the processing assembly processes the plastic raw material on the second workbench; S4, the threaded rod is rotated in the opposite direction, the rotating shaft rotates; the first clamping assembly rotates to cooperate with the second workbench, and the second clamping assembly rotates to cooperate with the first workbench; S5, the material roller on the second workbench discharges the material, the first clamping assembly pulls the plastic raw material on the second workbench to move, and the processing assembly processes the plastic raw material on the first workbench.

[0015] Compared with the prior art, the present invention has the following beneficial effects: the first clamping assembly and the second clamping assembly are alternately matched with the first workbench and the second workbench, and when the first clamping assembly pulls the plastic raw material on the first workbench to move, the second clamping assembly clamps and fixes the plastic raw material on the second workbench, so that the processing assembly can process the plastic raw material on the second workbench. When the first clamping assembly pulls the plastic on the second workbench to move, the second clamping assembly clamps and fixes the plastic on the first workbench, so that the processing assembly can process the plastic raw material on the first workbench, which is beneficial to ensuring the processing quality and helping to improve production efficiency.

[0016] When the clamping assembly clamps and fixes the plastic material, as the first motor runs, the two pressing blocks in the clamping assembly tend to approach each other, thereby ensuring the clamping and fixing effect of the clamping assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 is a top view of the present invention; Figure 3 is a partial cross-sectional view of the present invention; Figure 4 The present invention Figure 3 A magnified view of part A; Figure 5 It is a structural schematic diagram of the clamping assembly in the present invention; Figure 6 It is a schematic diagram of the connection between the threaded rod and the rotating shaft in the present invention; Figure 7 The present invention Figure 6 A magnified view of part B; Figure 8 It is a schematic diagram of the structure of the first fixing block and the second fixing block in the present invention; Fig. 9 The present invention Figure 8 Enlarged view of part C; Fig.10 It is a structural schematic diagram of the processing component in the present invention.

[0018] In the figure: 1, first workbench; 2, second workbench; 3, first material roller; 4, second material roller; 5, conveyor belt; 6, collection box; 7, limit plate; 8, bracket; 9, fixed seat; 10, first electric push rod; 11, slider; 12, fixed plate; 13, second electric push rod; 14, first pressure block; 15, support leg; 16, second pressure block; 17, connecting piece; 18, first nut; 19, second nut; 20, first threaded rod; 21, second threaded rod; 22, first support plate; 23. first motor; 24. first gear; 25. second gear; 26. first sprocket; 27. second sprocket; 28. third gear; 29. ​​fourth gear; 30. chain; 31. second support plate; 32. third pressure block; 33. fourth pressure block; 34. connecting block; 35. first fixed block; 36. second fixed block; 37. first rotating shaft; 38. second rotating shaft; 39. first spring; 40. clamping block; 41. clamping slot; 42. second spring; 43. push plate; 44. cutter. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments 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.

[0020] like Figure 1-Figure 10 As shown, the technical solution adopted by the present invention is as follows: a production line for processing plastic sheets, comprising a workbench and a clamping assembly. The workbench is used to lay plastic raw materials. A bracket 8 is fixedly connected to the lower end of the workbench, and the bracket 8 is used to support the workbench. A leg 15 for mounting a material roller is provided at one end of the workbench. There are two workbenches, namely a first workbench 1 and a second workbench 2. A first material roller 3 is rotatably mounted at the left end of the first workbench 1, and a second material roller 4 is rotatably mounted at the right end of the second workbench 2.

[0021] Limiting plates 7 are arranged on both sides of the first workbench 1 and the second workbench 2. The limiting plates 7 have a limiting effect on the plastic raw materials.

[0022] A processing assembly is disposed above the first workbench 1 and the second workbench 2. Through holes are provided on the first workbench 1 and the second workbench 2, and the processing assembly is disposed above the through holes. A collection box 6 is disposed below the through holes. A conveyor belt 5 is disposed below the first workbench 1 and the second workbench 2, and the collection box 6 is placed on the conveyor belt 5.

[0023] The processing assembly includes a fixed plate 12 and a push plate 43. A fixed seat 9 is fixedly provided on one side of the first workbench 1 and the second workbench 2, and a first electric push rod 10 is fixedly installed on the fixed seat 9. The telescopic end of the first electric push rod 10 is vertically upward, and a slider 11 is fixedly connected to the telescopic end of the first electric push rod 10. The fixed plate 12 is fixedly connected to the slider 11, and the fixed plate 12 is located above the through hole. The edges of the fixed plate 12 are bent downward by 90 degrees, and a cutter 44 is provided at the lower end of the fixed plate 12. A second electric push rod 13 is fixedly installed on the upper end surface of the fixed plate 12, and the telescopic end of the second electric push rod 13 vertically penetrates the fixed plate 12 downward and is fixedly connected to the push plate 43.

[0024] A support frame is arranged between the first workbench 1 and the second workbench 2. The support frame includes a first support plate 22 and a second support plate 31. The first support plate 22 and the second support plate 31 are both fixedly connected to the ground. Two threaded rods are rotatably mounted on the first support plate 22, namely, a first threaded rod 20 and a second threaded rod 21. The first threaded rod 20 and the second threaded rod 21 are both horizontally arranged and parallel to each other, and the first threaded rod 20 is above the second threaded rod 21. A first motor 23 is fixedly mounted on the first support plate 22, and the motor shaft of the first motor 23 is coaxially fixedly connected to the first threaded rod 20. A first gear 24 is coaxially fixedly mounted on the first threaded rod 20, and a second gear 25 is coaxially fixedly mounted on the second threaded rod 21, and the first gear 24 and the second gear 25 are meshed.

[0025] The end of the first threaded rod 20 away from the first support plate 22 is coaxially connected to the first rotating shaft 37, the first rotating shaft 37 is rotatably connected to the second support plate 31, and the rotation direction of the first rotating shaft 37 is opposite to that of the first threaded rod 20. The end of the second threaded rod 21 away from the first support plate 22 is coaxially connected to the second rotating shaft 38, the second rotating shaft 38 is rotatably connected to the second support plate 31, and the rotation direction of the second rotating shaft 38 is opposite to that of the second threaded rod 21.

[0026] A reversing assembly is provided between the first threaded rod 20 and the first rotating shaft 37. The reversing assembly includes a chain 30, a fourth gear 29 and a third gear 28. The first threaded rod 20 is coaxially fixedly installed with a first sprocket 26 at one end away from the first support plate 22, and the second rotating shaft 38 is coaxially fixedly installed with a second sprocket 27 at one end close to the second threaded rod 21. The chain 30 is wound between the first sprocket 26 and the second sprocket 27. The fourth gear 29 is coaxially fixedly connected to the second rotating shaft 38, and the third gear 28 is coaxially fixedly connected to the first rotating shaft 37. The third gear 28 and the fourth gear 29 are meshed. The first threaded rod 20 rotates counterclockwise, driving the first sprocket 26 to rotate counterclockwise, the second sprocket 27 to rotate counterclockwise, and the second rotating shaft 38 to rotate counterclockwise. Under the action of the third gear 28 and the fourth gear 29, the first rotating shaft 37 rotates clockwise. The first threaded rod 20 drives the second threaded rod 21 to rotate clockwise through the first gear 24 and the second gear 25.

[0027] The clamping assembly has two groups, namely, a first clamping assembly and a second clamping assembly. The first clamping assembly is installed between the first threaded rod 20 and the second threaded rod 21. The second clamping assembly is installed between the first rotating shaft 37 and the second rotating shaft 38.

[0028] Both threaded rods are threadedly connected with nuts, and the nuts are slidably connected with connecting blocks 34, and the connecting blocks 34 are threadedly connected with the corresponding threaded rods, and a first spring 39 is fixedly connected between the nut and the connecting block 34, and the first spring 39 is sleeved on the threaded rod. Specifically, the connecting block 34 is fixedly connected with a sliding rod, and a sliding groove that cooperates with the sliding rod is provided on the nut. The first spring 39 is in a stretched state, that is, the nut is subjected to the pulling force of the first spring 39, so that there is a certain friction between the nut and the threaded rod, so that the threaded rod can smoothly drive the nut to rotate. For the convenience of description, the nut connected to the first threaded rod 20 is named the first nut 18, and the nut connected to the second threaded rod 21 is named the second nut 19.

[0029] The first clamping assembly includes a first pressing block 14 and a second pressing block 16. The first nut 18 and the second nut 19 are both fixedly connected with a connecting piece 17. The first pressing block 14 is fixedly connected to the first nut 18 through the corresponding connecting piece 17, and the second pressing block 16 is fixedly connected to the second nut 19 through the corresponding connecting piece 17. The first pressing block 14 and the second pressing block 16 are respectively arranged on the upper and lower sides of the plastic raw material. The first pressing block 14 and the second pressing block 16 are close to each other to clamp and fix the plastic raw material. After the first pressing block 14 and the second pressing block 16 clamp and fix the plastic raw material, since the first pressing block 14 and the second pressing block 16 cannot continue to approach, the first threaded rod 20 drives the first nut 18 to move along the first threaded rod 20, and the second threaded rod 21 drives the second nut 19 to slide along the second threaded rod 21, so that the first pressing block 14 and the second pressing block 16 pull the plastic raw material to move, and the plastic raw material moves to the processing area, that is, above the through hole.

[0030] The first rotating shaft 37 is sleeved with the first fixing block 35, and the second rotating shaft 38 is sleeved with the second fixing block 36. A plug-in assembly is arranged between the first rotating shaft 37 and the first fixing block 35 and between the second rotating shaft 38 and the second fixing block 36.

[0031] The plug-in assembly includes a clamping block 40 and a second spring 42. The first fixing block 35 and the second fixing block 36 are both provided with mounting grooves, and the inner walls of the mounting grooves are provided with a plurality of clamping grooves 41. The first rotating shaft 37 and the second rotating shaft 38 are both provided with limiting grooves in the radial direction, and the clamping block 40 is slidably arranged in the limiting grooves, and the second spring 42 is fixedly connected between the clamping block 40 and the end wall of the limiting groove. The clamping block 40 and the clamping groove 41 are plug-fitted, and both sides of the end where the clamping block 40 and the clamping groove 41 are matched are provided with inclined surfaces.

[0032] The second clamping assembly includes a third pressing block 32 and a fourth pressing block 33. The third pressing block 32 is fixedly connected to the first fixing block 35, and the fourth pressing block 33 is fixedly connected to the second fixing block 36. The third pressing block 32 and the fourth pressing block 33 are close to each other to clamp and fix the plastic raw material, thereby facilitating the processing assembly to process the plastic raw material. After the third pressing block 32 and the fourth pressing block 33 clamp the plastic raw material, when the first rotating shaft 37 and the second rotating shaft 38 rotate, under the action of the inner wall of the clamping groove 41, the clamping block 40 slides into the limiting groove, thereby allowing the first rotating shaft 37 and the second rotating shaft 38 to rotate smoothly.

[0033] Working principle: Initially, Figure 1 , Figure 2 As shown, the first clamping assembly clamps the plastic material on the second workbench 2, and the first clamping assembly is located on the side of the second workbench 2 away from the second material roller 4. The second clamping assembly clamps the plastic material on the first workbench 1, and the second clamping assembly is located on the side of the first workbench 1 away from the first material roller 3.

[0034] The first motor 23 drives the first threaded rod 20 to rotate counterclockwise, and the first threaded rod 20 drives the second threaded rod 21 to rotate clockwise through the first gear 24 and the second gear 25. The first threaded rod 20 drives the first pressing block 14 to rotate counterclockwise through the first nut 18 and then moves to the upper side of the plastic raw material on the first workbench 1, and the second threaded rod 21 drives the second pressing block 16 to rotate clockwise through the second nut 19 and then moves to the lower side of the plastic raw material on the first workbench 1, until the first pressing block 14 and the second pressing block 16 clamp the plastic raw material on the first workbench 1.

[0035] At the same time, the first threaded rod 20 drives the first sprocket 26 to rotate counterclockwise, and under the action of the chain 30, the second sprocket 27 rotates counterclockwise, and the second rotating shaft 38 rotates counterclockwise. Under the action of the fourth gear 29 and the third gear 28, the first rotating shaft 37 rotates clockwise. The first rotating shaft 37 drives the first fixed block 35 to rotate clockwise through the clamping block 40, and the third pressing block 32 rotates clockwise and moves to the upper side of the plastic raw material on the second workbench 2. The second rotating shaft 38 drives the fourth pressing block 33 to rotate counterclockwise through the second fixed block 36, and the fourth pressing block 33 moves to the lower side of the plastic raw material on the second workbench 2. Then the third pressing block 32 and the fourth pressing block 33 clamp the plastic raw material on the second workbench 2.

[0036] Then the first material roller 3 is rotated to unwind, and the second material roller 4 is kept stationary.

[0037] Since the first pressing block 14 and the second pressing block 16 both contact the plastic raw material on the first workbench 1, as the first threaded rod 20 rotates, the first threaded rod 20 drives the first nut 18 to move away from the first support plate 22, and the second threaded rod 21 drives the second nut 19 to move away from the first support plate 22. The first clamping assembly drives the plastic raw material on the first workbench 1 to move away from the first material roller 3 until the first clamping assembly passes over the processing assembly on the first workbench 1 and moves to the side of the processing assembly on the first workbench 1 away from the first material roller 3. The first motor 23 is stopped, and the first material roller 3 stops rotating.

[0038] When the first clamping assembly moves, the third pressing block 32 and the fourth pressing block 33 are both against the plastic material on the second workbench 2. When the first rotating shaft 37 and the second rotating shaft 38 rotate, the clamping block 40 slides into the limiting groove under the pressure of the inner wall of the clamping groove 41, so that the first rotating shaft 37 and the second rotating shaft 38 can rotate smoothly, and the second clamping assembly keeps clamping the plastic material on the second workbench 2. Start the first electric push rod 10 to move the fixed plate 12 downward, and the cutter 44 on the fixed plate 12 cuts the plastic material.

[0039] When the first clamping assembly pulls the plastic on the first workbench 1 , the second clamping assembly clamps and fixes the plastic raw material on the second workbench 2 , and the processing assembly processes the plastic raw material on the second workbench 2 .

[0040] After that, the first motor 23 is started, the first threaded rod 20 rotates clockwise, and the second threaded rod 21 rotates counterclockwise, so that the first clamping assembly cooperates with the second workbench 2, and the first clamping assembly clamps the plastic raw material on the second workbench 2. At the same time, the second clamping assembly cooperates with the first workbench 1, so that the second clamping assembly clamps the plastic raw material on the first workbench 1. The processing assembly that cooperates with the first workbench 1 is started to cut the plastic raw material on the first workbench 1. At the same time, the second material roller 4 is rotated, the first clamping assembly moves away from the second material roller 4, and the first clamping assembly drives the plastic raw material on the second workbench 2 to move away from the second material roller 4 until the first clamping assembly returns to the initial state. The new plastic raw material is placed above the corresponding through hole to prepare for the next cutting.

[0041] Accordingly, when the first clamping assembly pulls the plastic material on the first workbench 1 to move, the second clamping assembly clamps and fixes the plastic material on the second workbench 2, so that the processing assembly can process the plastic material on the second workbench 2. When the first clamping assembly pulls the plastic on the second workbench 2 to move, the second clamping assembly clamps and fixes the plastic on the first workbench 1. The first clamping assembly and the second clamping assembly alternately cooperate with the first workbench 1 and the second workbench 2, so that the processing assembly can process the plastic material on the first workbench 1, which is conducive to ensuring processing quality and improving production efficiency.

[0042] The production method of a production line for processing plastic sheets in the present invention comprises the following specific steps: S1, the two workbenches are respectively the first workbench 1 and the second workbench 2; initially, the first clamping assembly cooperates with the second workbench 2, and the two pressing blocks in the first clamping assembly clamp the plastic raw material on the second workbench 2; the second clamping assembly cooperates with the first workbench 1, and the two pressing blocks in the second clamping assembly clamp the plastic raw material on the first workbench 1; S2, the threaded rod is rotated, and the threaded rod drives the pressure block in the first clamping assembly to rotate, so that the first clamping assembly cooperates with the first workbench 1; at the same time, the threaded rod drives the rotating shaft to rotate through the reversing assembly, and the rotating shaft drives the pressure block in the second clamping assembly to rotate, so that the second clamping assembly cooperates with the second workbench 2; S3, then, the material roller on the first workbench 1 is rotated to discharge the material, the first clamping assembly pulls the plastic raw material on the first workbench 1 to move, and the processing assembly processes the plastic raw material on the second workbench 2; S4, the threaded rod is rotated in the opposite direction, the shaft rotates; the first clamping assembly rotates to cooperate with the second workbench 2, and the second clamping assembly rotates to cooperate with the first workbench 1; S5. The material roller on the second workbench 2 discharges the material, the first clamping assembly pulls the plastic raw material on the second workbench 2 to move, and the processing assembly processes the plastic raw material on the first workbench 1.

[0043] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A production line for processing plastic sheets, characterized in that: It comprises a workbench for laying plastic raw materials and a clamping assembly; a material roller is arranged at one end of the workbench, a processing assembly is arranged at one side of the workbench, there are two workbenches, a support frame is arranged between the two workbenches, two threaded rods parallel to each other are rotatably mounted on the support frame, nuts are threadedly connected to the threaded rods; one end of each threaded rod is rotatably connected to a rotating shaft, a fixed block is connected and mounted on the rotating shaft through a plug-in assembly; the clamping assembly is connected to the support frame, the clamping assembly has two groups, namely a first clamping assembly and a second clamping assembly, each group of clamping assemblies comprises two pressing blocks; wherein the two pressing blocks in the first clamping assembly are respectively fixedly connected to the two nuts; the two pressing blocks in the second clamping assembly are respectively fixedly connected to the two fixed blocks; The two threaded rods rotate in opposite directions, and a reversing assembly is provided between the threaded rod and the rotating shaft, so that the rotating shaft rotates in opposite directions to the corresponding threaded rod; when the threaded rod rotates, the corresponding rotating shaft rotates in the opposite direction, and the pressing block rotates, thereby causing the pressing block to move from one workbench to another workbench, and the pressing block clamps the plastic raw material on the workbench, and then as the threaded rod rotates, the two pressing blocks in the first clamping assembly move along the threaded rod, thereby pulling the plastic raw material on the corresponding workbench, and at the same time, the processing assembly processes the plastic raw material on the workbench that cooperates with the second clamping assembly.

2. The production line for processing plastic sheets according to claim 1, characterized in that: A first motor (23) is mounted on the support frame, and a motor shaft of the first motor (23) is coaxially fixedly connected to one of the threaded rods, a first gear (24) is coaxially fixedly mounted on one of the threaded rods, and a second gear (25) is coaxially fixedly mounted on the other threaded rod, and the first gear (24) and the second gear (25) are meshed.

3. The production line for processing plastic sheets according to claim 1, characterized in that: The nut is slidably connected to a connecting block (34), a first spring (39) is fixedly connected between the connecting block (34) and the second nut (19), and the connecting block (34) is threadedly connected to the threaded rod.

4. The production line for processing plastic sheets according to claim 1, characterized in that: The plug-in assembly comprises a second spring (42) and a clamping block (40); a limiting groove is provided on the rotating shaft, the clamping block (40) is slidably arranged in the limiting groove, the second spring (42) is fixedly connected between the clamping block (40) and the end wall of the limiting groove; a mounting groove is provided on the fixing block, a plurality of clamping grooves (41) cooperating with the clamping block (40) are provided on the inner wall of the mounting groove, and inclined surfaces are provided on both sides of one end of the clamping block (40) cooperating with the clamping groove (41).

5. The production line for processing plastic sheets according to claim 1, characterized in that: The reversing assembly comprises a chain (30), a third gear (28) and a fourth gear (29); one of the threaded rods is coaxially fixedly connected to a first sprocket (26); a second sprocket (27) is coaxially fixedly mounted on a rotating shaft connected to the other threaded rod; the chain (30) is wound between the first sprocket (26) and the second sprocket (27); and the third gear (28) and the fourth gear (29) are coaxially fixedly connected to the two rotating shafts, respectively.

6. The production line for processing plastic sheets according to claim 1, characterized in that: A processing assembly is provided on one side of each workbench, a through hole is provided on the workbench, the processing assembly is arranged above the through hole, a collection box (6) is arranged below the through hole, and the processing assembly comprises a fixing plate (12); the fixing plate (12) is arranged above the through hole so as to move up and down, and a cutter (44) is provided at the lower end of the fixing plate (12).

7. The production line for processing plastic sheets according to claim 6, characterized in that: A push plate (43) is provided on the lower end surface of the fixed plate (12) so as to move up and down.

8. The production line for processing plastic sheets according to claim 1, characterized in that: Limiting plates (7) are provided on both sides of the workbench.

9. A production method for a production line for processing plastic sheets as claimed in claim 1, characterized in that: The specific steps are as follows: S1, the two workbenches are respectively a first workbench (1) and a second workbench (2); initially, the first clamping assembly cooperates with the second workbench (2), and the two pressing blocks in the first clamping assembly clamp the plastic raw material on the second workbench (2); the second clamping assembly cooperates with the first workbench (1), and the two pressing blocks in the second clamping assembly clamp the plastic raw material on the first workbench (1); S2, the threaded rod is rotated, and the threaded rod drives the pressure block in the first clamping assembly to rotate, so that the first clamping assembly cooperates with the first workbench (1); at the same time, the threaded rod drives the rotating shaft to rotate through the reversing assembly, and the rotating shaft drives the pressure block in the second clamping assembly to rotate, so that the second clamping assembly cooperates with the second workbench (2); S3, then, the material roller on the first workbench (1) rotates to discharge the material, the first clamping component pulls the plastic raw material on the first workbench (1) to move, and the processing component processes the plastic raw material on the second workbench (2); S4, the threaded rod is rotated in the opposite direction, the rotating shaft rotates; the first clamping assembly rotates to cooperate with the second workbench (2), and the second clamping assembly rotates to cooperate with the first workbench (1); S5, the material roller on the second workbench (2) discharges the material, the first clamping component pulls the plastic raw material on the second workbench (2) to move, and the processing component processes the plastic raw material on the first workbench (1).

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