A calendering apparatus for processing tough PET sheets

Abstract

This invention belongs to the field of PET sheet production equipment, specifically a calendering device for processing tough PET sheets. It includes a frame with a guiding calendering mechanism mounted on it. The guiding calendering mechanism includes an upper guide roller, a lower guide roller, an upper calendering roller, and a lower calendering roller. The lower guide roller and lower calendering roller are rotatably mounted on the frame, while the upper guide roller and upper calendering roller are slidably mounted on the frame. The upper and lower guide rollers are vertically aligned, as are the upper and lower calendering rollers. This invention utilizes a fork-adaptive sheet feeding assembly, allowing multiple calendered PET sheets to be vertically aligned and placed between multiple right-angled plates for subsequent handling. Furthermore, the bottommost PET sheet has a gap for the forks to extend into, preventing the forklift forks from being unable to support the bottom layer of PET sheets due to stacking after calendering, thus avoiding interference with transport operations.

Description

Technical Field

[0001] This invention belongs to the field of PET sheet production equipment, specifically a calendering device for processing tough PET sheets. Background Technology

[0002] Tough PET sheets refer to PET sheets that have undergone special modification treatment, significantly improving their impact resistance and fracture resistance while maintaining the original excellent properties of PET. PET sheets require calendering during production.

[0003] Patent CN221136658U discloses a calendering device for PET sheets, belonging to the field of PET sheet production equipment. It includes a carrying mechanism, a guiding mechanism at the top of the carrying mechanism, a driving mechanism mounted on the top of the carrying mechanism, a guiding mechanism on the side of the carrying mechanism, and a moving mechanism mounted on the guiding mechanism. The moving mechanism includes a moving seat, with a moving block fixedly connected to the bottom of the moving seat. The guiding mechanism includes an electric guide rail. An L-shaped guide groove is formed inside the electric guide rail, and the moving block is slidably connected within the L-shaped guide groove. The advantages are: the inclusion of a driving mechanism, a moving mechanism, and a guiding mechanism; the cooperation of the upper rotating shaft and the locking block, and the lower rotating shaft and the locking shaft; and the release of the locking rod, allowing the electric guide rail to pull out the moving seat, facilitating the maintenance and replacement of the upper and lower calendering rollers, ensuring good calendering results, and making it convenient and practical.

[0004] However, the above technical solutions still have the following shortcomings in practical applications: When PET sheets are calendered, the calendered PET sheets are stacked one by one for subsequent storage and transportation. However, in some cases, forklifts are needed to transfer multiple calendered PET sheets to the next process. Because the PET sheets are stacked, the forklift forks have difficulty supporting the bottom layer of PET sheets, and multiple PET sheets are stuck together, making it difficult for the forks to lift a specified number of PET sheets, thus affecting the normal progress of subsequent transportation. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art and solve at least one of the technical problems mentioned in the background art, the present invention proposes a calendering device for processing tough PET sheets.

[0006] The technical solution adopted by the present invention to solve its technical problem is: a calendering device for processing tough PET sheets, including a frame, wherein a guiding calendering mechanism is provided on the frame; The guiding and stretching mechanism includes an upper guide roller, a lower guide roller, an upper stretching roller, and a lower stretching roller. The lower guide roller and the lower stretching roller are rotatably mounted on the frame, and the upper guide roller and the upper stretching roller are slidably mounted on the frame. The upper guide roller and the lower guide roller are vertically aligned; the upper stretching roller and the lower stretching roller are vertically aligned. Including fork-adaptive sheet feeding components; The fork-adaptive sheet feeding assembly includes a mounting plate fixedly connected to one side of the bottom of the frame. A fixed plate is fixedly connected to one side of the upper surface of the mounting plate, and a sliding plate is slidably connected to the other side. Both the fixed plate and the sliding plate are provided with sliding grooves, and right-angle plates are slidably connected to both sides of the sliding grooves. A gantry frame is slidably connected to one side of the bottom of the frame. A rack and pinion is slidably connected to the middle of the upper end of the gantry frame. A vacuum generator is fixedly connected to the lower end of the rack and pinion. The vacuum port of the vacuum generator is connected to a suction cup through a rigid tube.

[0007] Preferably, cylinder one and cylinder two are fixedly connected to the upper two sides of the frame, respectively. The piston end of cylinder one is fixedly connected to one end of the upper guide roller, and the piston end of cylinder two is fixedly connected to one end of the upper extension roller.

[0008] Preferably, it includes a correction component; The correction assembly includes a correction table for receiving the sheet material after calendering, the correction table being fixedly connected to one side of the frame; it also includes two cylinders, the two cylinders being symmetrically fixedly connected to both sides of the upper surface of the correction table, and a correction plate being fixedly connected to the piston end of each cylinder.

[0009] Preferably, a threaded rod is threadedly connected to one side of the lower end of the gantry frame, and both ends of the threaded rod are rotatably mounted on the frame. A motor is fixedly connected to one side of the bottom of the frame, and the output end of the motor is fixedly connected to one end of the threaded rod. A gear is rotatably mounted on one side of the upper end of the gantry frame, and the gear meshes with the gear teeth on the rack. A motor is fixedly connected to one side of the upper end of the gantry frame, and the output end of the motor is fixedly connected to the gear.

[0010] Preferably, a cylinder five is fixedly connected to one side of the upper surface of the mounting plate, and the piston end of the cylinder five is fixedly connected to one side of the sliding plate.

[0011] Preferably, the bottoms of the two right-angle plates that are laterally corresponding on the sliding plate and the fixed plate are connected by a telescopic rod. The two ends of the bottom groove of the fixed plate are rotatably provided with a bidirectional threaded rod. The bidirectional threaded rod is provided with two threads of different directions, and the two sides of the bidirectional threaded rod are respectively threaded to the two right-angle plates. A second motor is fixedly connected to one end of the fixed plate, and the output end of the second motor is fixedly connected to one end of the bidirectional threaded rod.

[0012] Preferably, it includes a separator component; The separating component includes multiple contact blocks that are equidistantly distributed along the longitudinal direction and slidably pass through right-angle plates. One side of each contact block is an inclined surface. Two right-angle plates on the sliding plate are slidably connected to one side of each right-angle plate. A slider is slidably connected to one side of each right-angle plate. A pressure column is fixedly connected to one side of each slider. When the pressure column moves from bottom to top, it will sequentially contact the inclined surfaces of the multiple contact blocks.

[0013] Preferably, a threaded rod 2 is threadedly connected to one side of the slider, and both ends of the threaded rod 2 are rotatably mounted on a right-angle plate. A motor 4 is fixedly connected to one upper side of the right-angle plate, and the output end of the motor 4 is fixedly connected to one end of the threaded rod 2. A cylinder 4 is fixedly connected to the upper end of each of the two right-angle plates located on the sliding plate, and the piston end of the cylinder 4 is fixedly connected to one end of the baffle.

[0014] Preferably, a winding wheel is rotatably provided on one side of the bottom of the right-angle plate, and a strip of cloth is wound on the winding wheel. The strip of cloth slides through one side of the right-angle plate, and the end of the strip of cloth is fixedly connected to the pressure column. A spring is fixedly connected to one end of the contact block, and the other end of the spring is fixedly connected to the right-angle plate. A motor is fixedly connected to one side of the lower end of the right-angle plate, and the output end of the motor is fixedly connected to one end of the winding wheel.

[0015] Preferably, it includes an auxiliary discharge component; The auxiliary discharge assembly includes a pressure block and a support block. The support block is fixedly connected to the outer wall of the rigid pipe. The pressure block is slidably disposed in the rack and pinion groove. A threaded rod three is threadedly connected to one side of the pressure block. Both ends of the threaded rod three are rotatably disposed at both ends of the rack and pinion groove. A motor five is fixedly connected to one side of the upper end of the rack and pinion. The output end of the motor five is fixedly connected to one end of the threaded rod three.

[0016] The beneficial effects of this invention are as follows: 1. The present invention discloses a calendering device for processing tough PET sheets. Utilizing a fork-adaptive sheet unloading assembly, multiple calendered PET sheets are vertically aligned and placed between multiple right-angled plates for subsequent retrieval. Furthermore, a gap is provided below the bottommost PET sheet for fork insertion, preventing the forklift forks from being unable to support the bottom layer of calendered PET sheets due to stacking, thus avoiding disruption to the transfer process. Moreover, by separating and then stacking multiple PET sheets, the forks can lift a specified number of PET sheets as needed to meet batch transfer requirements.

[0017] 2. The calendering device for processing tough PET sheets according to the present invention utilizes an auxiliary discharge assembly. Whenever the forks support the bottom of the PET sheet and move it away from between multiple right-angle plates, the rack and pinion descends and moves laterally, causing the support block to hold the bottom of the lowest PET sheet. Subsequently, the pressure block moves downward and contacts the uppermost PET sheet, clamping the stacked PET sheets between the support block and the pressure block. Then, the rack and pinion move laterally synchronously until the PET sheet is released from between the multiple right-angle plates, and then the support block and pressure block move away from the PET sheet. Throughout the release process, because the stacked PET sheets are clamped by the support block and pressure block, the PET sheets are less likely to shift or slip due to friction from the right-angle plates at the edges, further ensuring the neatness and stability of the PET sheets and facilitating smooth subsequent transfer operations. Attached Figure Description

[0018] The invention will now be further described with reference to the accompanying drawings.

[0019] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a three-dimensional structural schematic diagram of the present invention from another perspective; Figure 3 This is a schematic diagram of the three-dimensional structure at the mounting plate. Figure 4 yes Figure 3 Enlarged view of a portion of point A in the middle; Figure 5 yes Figure 3 Enlarged view of a section at point B in the middle; Figure 6 This is a schematic diagram of the three-dimensional structure at the slider. Figure 7 This is a schematic diagram of the three-dimensional structure of the alignment platform; Figure 8 This is a schematic diagram of the three-dimensional structure of the rack and pinion; Figure 9 yes Figure 8 Enlarged view of a section at point C; Figure 10 This is a schematic diagram of the three-dimensional structure of the pressing block.

[0020] In the diagram: 1. Frame; 2. Cylinder 1; 3. Cylinder 2; 4. Upper guide roller; 5. Lower guide roller; 6. Lower extension pressure roller; 7. Gantry frame; 8. Rack and pinion; 9. Threaded rod 1; 10. Motor 1; 11. Alignment table; 12. Cylinder 3; 13. Alignment plate; 14. Sliding plate; 15. Fixing plate; 16. Telescopic rod; 17. Right-angle plate; 18. Baffle; 19. Motor 2; 20. Bidirectional threaded rod; 21. Motor 3; 22. Threaded rod 2; 23. Cloth strip; 24. Contact block; 25. Winding wheel; 26. Cylinder 4; 27. Motor 4; 28. Spring; 29. ​​Slider; 30. Pressure column; 31. Threaded rod 3; 32. Pressure block; 33. Motor 5; 34. Vacuum generator; 35. Rigid tube; 36. Suction cup; 37. Support block; 38. Motor 6; 39. Gear; 40. Upper extension pressure roller; 41. Mounting plate; 42. Cylinder 5. Detailed Implementation

[0021] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Please refer to Figures 1-10 The present invention provides a technical solution: a calendering device for processing tough PET sheets, including a frame 1, on which a guiding calendering mechanism is provided; The guiding and stretching mechanism includes an upper guide roller 4, a lower guide roller 5, an upper stretching roller 40, and a lower stretching roller 6. The lower guide roller 5 and the lower stretching roller 6 are rotatably mounted on the frame 1, while the upper guide roller 4 and the upper stretching roller 40 are slidably mounted on the frame 1. The upper guide roller 4 and the lower guide roller 5 are vertically aligned; the upper stretching roller 40 and the lower stretching roller 6 are vertically aligned. Including fork-adaptive sheet feeding components; The fork-adaptive sheet feeding assembly includes a mounting plate 41 fixedly connected to one side of the bottom of the frame 1. A fixing plate 15 is fixedly connected to one side of the upper surface of the mounting plate 41, and a sliding plate 14 is slidably connected to the other side. Both the fixing plate 15 and the sliding plate 14 are provided with sliding grooves, and right-angle plates 17 are slidably connected to both sides of the sliding grooves. A gantry frame 7 is slidably connected to one side of the bottom of the frame 1. A rack and pinion 8 is slidably connected to the middle of the upper end of the gantry frame 7. A vacuum generator 34 is fixedly connected to the lower end of the rack and pinion 8. The vacuum port of the vacuum generator 34 is connected to a suction cup 36 through a rigid tube 35.

[0023] In this embodiment, as Figures 1-9As shown, cylinder 2 and cylinder 3 are fixedly connected to the upper two sides of the frame 1, respectively. The piston end of cylinder 2 is fixedly connected to one end of the upper guide roller 4, and the piston end of cylinder 3 is fixedly connected to one end of the upper extension roller 40.

[0024] Including correction components; The correction assembly includes a correction table 11 for receiving the rolled sheet, which is fixedly connected to one side of the frame 1; it also includes two cylinders 12, which are symmetrically fixedly connected to both sides of the upper end face of the correction table 11, and a correction plate 13 is fixedly connected to the piston end of the cylinders 12.

[0025] A threaded rod 9 is threadedly connected to one side of the lower end of the gantry frame 7. Both ends of the threaded rod 9 are rotatably mounted on the frame 1. A motor 10 is fixedly connected to one side of the bottom of the frame 1. The output end of the motor 10 is fixedly connected to one end of the threaded rod 9. A gear 39 is rotatably mounted on one side of the upper end of the gantry frame 7. The gear 39 meshes with the gear block on the rack 8. A motor 38 is fixedly connected to one side of the upper end of the gantry frame 7. The output end of the motor 38 is fixedly connected to the gear 39.

[0026] A cylinder 42 is fixedly connected to one side of the upper surface of the mounting plate 41, and the piston end of the cylinder 42 is fixedly connected to one side of the sliding plate 14.

[0027] The bottoms of the two right-angle plates 17 on the sliding plate 14 and the fixed plate 15 are connected by a telescopic rod 16. The two ends of the bottom groove of the fixed plate 15 are rotatably provided with a bidirectional threaded rod 20. The bidirectional threaded rod 20 is provided with two threads of different directions, and the two sides of the bidirectional threaded rod 20 are respectively threaded to the two right-angle plates 17. One end of the fixed plate 15 is fixedly connected to a motor 2 19, and the output end of the motor 2 19 is fixedly connected to one end of the bidirectional threaded rod 20.

[0028] Includes separator components; The separating component includes multiple contact blocks 24 that are equidistantly distributed along the longitudinal direction and slidably pass through the right-angle plate 17. One side of the contact block 24 is an inclined surface. Two right-angle plates 17 located on the sliding plate 14 are slidably connected to one side of a baffle 18. A slider 29 is slidably connected to one side of the right-angle plate 17. A pressure post 30 is fixedly connected to one side of the slider 29. When the pressure post 30 moves from bottom to top, it will contact the inclined surface of the multiple contact blocks 24 in sequence.

[0029] A threaded rod 22 is threadedly connected to one side of the slider 29. Both ends of the threaded rod 22 are rotatably mounted on the right-angle plate 17. A motor 4 27 is fixedly connected to one side of the upper end of the right-angle plate 17. The output end of the motor 4 27 is fixedly connected to one end of the threaded rod 22. Cylinder 4 26 is fixedly connected to the upper end of the two right-angle plates 17 located on the sliding plate 14. The piston end of cylinder 4 26 is fixedly connected to one end of the baffle 18.

[0030] A winding wheel 25 is rotatably mounted on one side of the bottom of the right-angle plate 17. A strip of cloth 23 is wound on the winding wheel 25. The strip of cloth 23 slides through one side of the right-angle plate 17, and the end of the strip of cloth 23 is fixedly connected to the pressure column 30. A spring 28 is fixedly connected to one end of the contact block 24, and the other end of the spring 28 is fixedly connected to the right-angle plate 17. A motor 21 is fixedly connected to one side of the lower end of the right-angle plate 17. The output end of the motor 21 is fixedly connected to one end of the winding wheel 25.

[0031] Specifically, in existing technologies, when calendering PET sheets, the calendered PET sheets are stacked one by one into a stack for subsequent storage and transportation. However, in some cases, forklifts are needed to transport multiple calendered PET sheets to the next process. Because the PET sheets are stacked, the forklift forks have difficulty supporting the bottom of the bottom PET sheet, and multiple PET sheets are stuck together, making it difficult for the forks to lift a specified number of PET sheets, thus affecting the normal progress of subsequent transportation.

[0032] Therefore, in order to solve the above problems, the working principle of this embodiment is as follows: This method is applied to the calendering of rectangular PET sheets of the same specifications in the same batch. First, according to the specifications of the PET sheet, cylinder 5 42 drives the sliding plate 14 to move laterally on the mounting plate 41, thereby adjusting the distance between the sliding plate 14 and the fixed plate 15. Motor 2 19 drives the bidirectional threaded rod 20 to rotate, causing the two right-angled plates 17 on the fixed plate 15 to slide towards or away from each other. Furthermore, with the connection of the telescopic rod 16, the two right-angled plates 17 on the sliding plate 14 will also move synchronously until the rectangle formed by the four included angles of the four right-angled plates 17 matches the specifications of the PET sheet. Then, according to the thickness of the PET sheet, cylinders 1 2 and 2 3 are used to adjust the height of the upper guide roller 4 and the upper calendering roller 40, respectively. The PET sheet passes between the upper guide roller 4 and the lower guide roller 5, enters above the lower calendering roller 6, and is calendered by the upper calendering roller 40.

[0033] After being rolled, the PET sheet will fall onto the alignment table 11. At this time, the two cylinders 12 simultaneously drive the alignment plate 13 to approach the PET sheet, and the PET sheet will be centered on the alignment table 11 due to the push of the alignment plate 13.

[0034] At this point, motor 38 drives gear 39 to rotate, causing rack 8 to slide downwards until suction cup 36 adheres to the surface of the PET sheet. Then, vacuum generator 34 is activated, and suction cup 36 picks up the PET sheet. Subsequently, motor 10 drives threaded rod 9 to rotate, causing gantry 7 to move laterally. The picked-up PET sheet will also move laterally accordingly until the four corners of the PET sheet align with the angles of the four right-angle plates 17. Then, the PET sheet is driven down again, allowing it to enter between the right-angle plates 17 and be placed on the lowest contact block 24. Then, suction cup 36 releases the PET sheet and returns to its original position.

[0035] Initially, the pressure column 30 is at its lowest point and in contact with the bottommost contact block 24. When a PET sheet is placed on the bottommost contact block 24, the motor 27 drives the threaded rod 22 to rotate, causing the slider 29 and pressure column 30 to move upwards. The pressure column 30 contacts and presses the next contact block 24, causing the end of the contact block 24 to extend into the right-angle plate 17, and the spring 28 to be compressed. The next PET sheet can then be placed on this contact block 24. This process is repeated, and each time a PET sheet is pressed, it is placed on the four contact blocks 24 for support. Simultaneously, as the pressure column 30 moves upwards, the motor 21 drives the winding wheel 25 to rotate, unwinding the fabric strip 23. The fabric strip 23 contacts the already pressed contact block 24 and prevents it from returning to its original position. This allows multiple PET sheets to be placed vertically aligned between the four right-angle plates 17. Because the four corners of the PET sheets are restrained, they are less likely to shift during placement.

[0036] When it is necessary to remove stacked PET sheets using the forks, the pressure column 30 is driven downwards to reset according to the number of PET sheets to be removed at one time. At the same time, the cloth strip 23 is rolled up, and multiple contact blocks 24 reset from top to bottom. The unsupported PET sheets will fall onto the PET sheets below until the specified number of PET sheets overlap. Then, the cylinder 26 drives the baffle 18 to move laterally, so that the baffle 18 no longer obstructs the edges of the PET sheets. At this time, the forklift forks can be inserted under the stacked PET sheets, and then the overlapped PET sheets can be lifted for transfer. This avoids the situation where the forklift forks cannot support the bottom of the bottom PET sheets due to the stacking of the PET sheets after pressing, thus affecting the transfer work. Furthermore, by separating multiple PET sheets before stacking them, the forks can lift a specified number of PET sheets as needed to meet the requirements of batch transfer.

[0037] In this embodiment, as Figure 10 As shown, it includes an auxiliary discharge component; The auxiliary discharge assembly includes a pressure block 32 and a support block 37. The support block 37 is fixedly connected to the outer wall of the rigid pipe 35. The pressure block 32 is slidably disposed in the slide groove of the rack rod 8. A threaded rod 31 is threadedly connected to one side of the pressure block 32. Both ends of the threaded rod 31 are rotatably disposed at both ends of the slide groove of the rack rod 8. A motor 5 33 is fixedly connected to one side of the upper end of the rack rod 8. The output end of the motor 5 33 is fixedly connected to one end of the threaded rod 31.

[0038] Specifically, in the above embodiment, although the stacked PET sheets can be removed from between the multiple right-angle plates 17 using forks, since the forks only support the bottom of the PET sheets, when the PET sheets are moved laterally from between the multiple right-angle plates 17, the edges of the PET sheets will be rubbed by the surface of the right-angle plates 17, which can easily cause the PET sheets to shift or even slip off.

[0039] Therefore, in order to solve the above problems, the working principle of this embodiment is as follows: Whenever the forks support the bottom of the PET sheet and move it away from between the multiple right-angle plates 17, the rack 8 is driven to descend and move laterally, causing the support block 37 to hold the bottom of the lowest PET sheet. Then, motor 5 33 drives the threaded rod 31 to rotate, causing the pressure block 32 to move downwards and contact the highest PET sheet, thus clamping the stacked PET sheets between the support block 37 and the pressure block 32. Then, the rack 8 and forks move laterally synchronously until the PET sheet is released from between the multiple right-angle plates 17, and then the support block 37 and pressure block 32 move away from the PET sheet. Throughout the release process, because the stacked PET sheets are clamped by the support block 37 and pressure block 32, the PET sheets are less likely to shift or slip due to friction from the edges of the right-angle plates 17, further ensuring the neatness and stability of the PET sheets and facilitating smooth subsequent transfer operations.

[0040] Working principle: First, according to the specifications of the PET sheet, cylinder 5 42 drives the sliding plate 14 to move laterally on the mounting plate 41, thereby adjusting the distance between the sliding plate 14 and the fixed plate 15. Motor 2 19 drives the bidirectional threaded rod 20 to rotate, causing the two right-angled plates 17 on the fixed plate 15 to slide towards or away from each other. Furthermore, connected by the telescopic rod 16, the two right-angled plates 17 on the sliding plate 14 also move synchronously until the rectangle formed by the four included angles of the four right-angled plates 17 matches the specifications of the PET sheet. Then, according to the thickness of the PET sheet, cylinders 1 2 and 2 3 respectively adjust the height of the upper guide roller 4 and the upper stretching roller 40. The PET sheet passes between the upper guide roller 4 and the lower guide roller 5, enters above the lower stretching roller 6, and is stretched by the upper stretching roller 40.

[0041] After being rolled, the PET sheet will fall onto the alignment table 11. At this time, the two cylinders 12 simultaneously drive the alignment plate 13 to approach the PET sheet, and the PET sheet will be centered on the alignment table 11 due to the push of the alignment plate 13.

[0042] At this point, motor 38 drives gear 39 to rotate, causing rack 8 to slide downwards until suction cup 36 adheres to the surface of the PET sheet. Then, vacuum generator 34 is activated, and suction cup 36 picks up the PET sheet. Subsequently, motor 10 drives threaded rod 9 to rotate, causing gantry 7 to move laterally. The picked-up PET sheet will also move laterally accordingly until the four corners of the PET sheet align with the angles of the four right-angle plates 17. Then, the PET sheet is driven down again, allowing it to enter between the right-angle plates 17 and be placed on the lowest contact block 24. Then, suction cup 36 releases the PET sheet and returns to its original position.

[0043] Initially, the pressure column 30 is at its lowest point and in contact with the bottommost contact block 24. When a PET sheet is placed on the bottommost contact block 24, the motor 27 drives the threaded rod 22 to rotate, causing the slider 29 and pressure column 30 to move upwards. The pressure column 30 contacts and presses the next contact block 24, causing the end of the contact block 24 to extend into the right-angle plate 17, and the spring 28 to be compressed. The next PET sheet can then be placed on this contact block 24. This process is repeated, and each time a PET sheet is pressed, it is placed on the four contact blocks 24 for support. Simultaneously, as the pressure column 30 moves upwards, the motor 21 drives the winding wheel 25 to rotate, unwinding the fabric strip 23. The fabric strip 23 contacts the already pressed contact block 24 and prevents it from returning to its original position. This allows multiple PET sheets to be placed vertically aligned between the four right-angle plates 17. Because the four corners of the PET sheets are restrained, they are less likely to shift during placement.

[0044] When it is necessary to remove stacked PET sheets using the forks, the pressure column 30 is driven downwards to reset according to the number of PET sheets to be removed at one time. At the same time, the cloth strip 23 is rolled up, and multiple contact blocks 24 reset from top to bottom. The unsupported PET sheets will fall onto the PET sheets below until a specified number of PET sheets overlap. Then, the cylinder 26 drives the baffle 18 to move laterally, so that the baffle 18 no longer obstructs the edges of the PET sheets. At this time, the forklift forks can be extended under the stacked PET sheets, and then the overlapped PET sheets can be lifted up for transfer.

[0045] Whenever the forks support the bottom of the PET sheet and move it away from between the multiple right-angle plates 17, the rack 8 is driven to descend and move laterally, causing the support block 37 to support the bottom of the lowest PET sheet. Then, the motor 33 drives the threaded rod 31 to rotate, causing the pressure block 32 to move downwards and contact the highest PET sheet, thus clamping the stacked PET sheets between the support block 37 and the pressure block 32. Then, the rack 8 and forks move laterally synchronously until the PET sheet is released from between the multiple right-angle plates 17, and then the support block 37 and pressure block 32 move away from the PET sheet.

[0046] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A calendering apparatus for processing tough PET sheets, comprising a frame (1), characterized in that: The frame (1) is provided with a guiding and pressing mechanism; The guiding and stretching mechanism includes an upper guide roller (4), a lower guide roller (5), an upper stretching roller (40), and a lower stretching roller (6). The lower guide roller (5) and the lower stretching roller (6) are rotatably mounted on the frame (1), and the upper guide roller (4) and the upper stretching roller (40) are slidably mounted on the frame (1). The upper guide roller (4) and the lower guide roller (5) are vertically aligned; the upper stretching roller (40) and the lower stretching roller (6) are vertically aligned. Including fork-adaptive sheet feeding components; The fork-adaptive sheet unloading assembly includes a mounting plate (41) fixedly connected to one side of the bottom of the frame (1). A fixing plate (15) is fixedly connected to one side of the upper surface of the mounting plate (41), and a sliding plate (14) is slidably connected to the other side. Sliding grooves are provided on both the fixing plate (15) and the sliding plate (14), and right-angle plates (17) are slidably connected to both sides of the sliding grooves. A gantry frame (7) is slidably connected to one side of the bottom of the frame (1). A rack rod (8) is slidably connected to the middle of the upper end of the gantry frame (7). A vacuum generator (34) is fixedly connected to the lower end of the rack rod (8). The vacuum port of the vacuum generator (34) is connected to a suction cup (36) through a hard tube (35).

2. The calendering apparatus for processing tough PET sheets according to claim 1, characterized in that: The upper sides of the frame (1) are respectively fixedly connected to cylinder one (2) and cylinder two (3). The piston end of cylinder one (2) is fixedly connected to one end of the upper guide roller (4), and the piston end of cylinder two (3) is fixedly connected to one end of the upper extension roller (40).

3. The calendering apparatus for processing tough PET sheets according to claim 1, characterized in that: Including correction components; The correction assembly includes a correction table (11) for receiving the sheet after the extrusion is completed. The correction table (11) is fixedly connected to one side of the frame (1). It also includes two cylinders (12). The two cylinders (12) are symmetrically fixedly connected to both sides of the upper end face of the correction table (11). The piston end of the cylinders (12) is fixedly connected to a correction plate (13).

4. The calendering apparatus for processing tough PET sheets according to claim 1, characterized in that: A threaded rod (9) is threadedly connected to one side of the lower end of the gantry frame (7). Both ends of the threaded rod (9) are rotatably mounted on the frame (1). A motor (10) is fixedly connected to one side of the bottom of the frame (1). The output end of the motor (10) is fixedly connected to one end of the threaded rod (9). A gear (39) is rotatably mounted on one side of the upper end of the gantry frame (7). The gear (39) meshes with the toothed blocks on the rack (8). A motor (38) is fixedly connected to one side of the upper end of the gantry frame (7). The output end of the motor (38) is fixedly connected to the gear (39).

5. A calendering apparatus for processing tough PET sheets according to claim 1, characterized in that: A cylinder five (42) is fixedly connected to one side of the upper end face of the mounting plate (41), and the piston end of the cylinder five (42) is fixedly connected to one side of the sliding plate (14).

6. The calendering apparatus for processing tough PET sheets according to claim 1, characterized in that: The bottom of the two right-angle plates (17) on the sliding plate (14) and the fixed plate (15) are connected by a telescopic rod (16). The two ends of the bottom groove of the fixed plate (15) are rotatably provided with a bidirectional threaded rod (20). The bidirectional threaded rod (20) is provided with two threads of different directions, and the two sides of the bidirectional threaded rod (20) are respectively threaded to the two right-angle plates (17). One end of the fixed plate (15) is fixedly connected to a motor (19), and the output end of the motor (19) is fixedly connected to one end of the bidirectional threaded rod (20).

7. A calendering apparatus for processing tough PET sheets according to claim 1, characterized in that: Includes separator components; The separating component includes multiple contact blocks (24) that are equidistantly distributed along the longitudinal direction and slidably pass through the right-angle plate (17). One side of each contact block (24) is an inclined surface. Two right-angle plates (17) located on the sliding plate (14) are slidably connected to one side of each other with baffles (18). A slider (29) is slidably connected to one side of each right-angle plate (17). A pressure column (30) is fixedly connected to one side of each slider (29). When the pressure column (30) moves from bottom to top, it will contact the inclined surfaces of the multiple contact blocks (24) in sequence.

8. A calendering apparatus for processing tough PET sheets according to claim 7, characterized in that: The slider (29) is threaded to one side with a threaded rod (22). Both ends of the threaded rod (22) are rotatably mounted on the right-angle plate (17). The upper side of the right-angle plate (17) is fixedly connected to a motor (27). The output end of the motor (27) is fixedly connected to one end of the threaded rod (22). The upper ends of the two right-angle plates (17) on the sliding plate (14) are fixedly connected to cylinders (26). The piston end of the cylinder (26) is fixedly connected to one end of the baffle (18).

9. A calendering apparatus for processing tough PET sheets according to claim 7, characterized in that: A winding wheel (25) is rotatably mounted on one side of the bottom of the right-angle plate (17). A strip of cloth (23) is wound on the winding wheel (25). The strip of cloth (23) slides through one side of the right-angle plate (17), and the end of the strip of cloth (23) is fixedly connected to the pressure column (30). A spring (28) is fixedly connected to one end of the contact block (24), and the other end of the spring (28) is fixedly connected to the right-angle plate (17). A motor (21) is fixedly connected to one side of the lower end of the right-angle plate (17), and the output end of the motor (21) is fixedly connected to one end of the winding wheel (25).

10. A calendering apparatus for processing tough PET sheets according to claim 9, characterized in that: Including auxiliary discharge components; The auxiliary discharge assembly includes a pressure block (32) and a support block (37). The support block (37) is fixedly connected to the outer wall of the rigid pipe (35). The pressure block (32) is slidably disposed in the groove of the rack rod (8). A threaded rod three (31) is threadedly connected to one side of the pressure block (32). Both ends of the threaded rod three (31) are rotatably disposed at both ends of the groove of the rack rod (8). A motor five (33) is fixedly connected to one side of the upper end of the rack rod (8). The output end of the motor five (33) is fixedly connected to one end of the threaded rod three (31).

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