Traction equipment and method for PVC (polyvinyl chloride) film processing

Abstract

The invention relates to the field of PVC film processing, and discloses traction equipment for PVC film processing and a method thereof.The traction equipment comprises a middle plate, a first folding plate is arranged on the right side of the middle plate, a traction structure is arranged on the left side of the first folding plate, and a second folding plate is arranged on the left side of the middle plate; a guide structure is arranged on the right side of the upper face of the second folding plate, the first folding plate and the second folding plate are arranged on the middle plate through a folding structure, and when the equipment needs to be stored or transported, the two lower pressing rollers are driven to be folded under the action of the folding structure and the folding and unfolding structure, and then the equipment can be stored or transported. And the first folding plate and the second folding plate are rotated and folded to the two sides of the middle plate, so that the occupied space of the equipment is greatly reduced, and the equipment is convenient to store or transport.

Description

Technical Field

[0001] The invention relates to the technical field of PVC film processing, and in particular to a traction device and a method for PVC film processing. Background Art

[0002] The main component of PVC film is polyvinyl chloride, and other ingredients are added to enhance its heat resistance, toughness, ductility, etc. The top layer of this surface film is paint, the main component in the middle is polyvinyl chloride, and the bottom layer is back-coated adhesive; when processing PVC film, it needs to be pulled, and pulling equipment is used; The traction equipment in the prior art flattens the film by moving the flattening roller, thereby achieving the effect of flattening the film, so that the film can be wound flatly, ensuring the appearance of the film after winding, and also ensuring the quality of the product; the film is straightened by moving the straightening block to avoid the position of the film from being offset, which affects the winding of the film; after being flattened, the film can contact the triangular bracket, and at this time, the film and the triangular bracket rub against each other, which can prevent the film from shrinking and affecting the flattening effect; The traction equipment in the prior art has a relatively large overall size because the winder, moving assembly, guide assembly and tensioning mechanism are distributed on the bottom plate. When storing or transporting, the large space occupied by the equipment makes the storage or transportation relatively unstable. Therefore, there is room for improvement. Summary of the invention

[0003] In order to solve the problems raised in the above background technology, the present invention provides a pulling device and method for PVC film processing.

[0004] In a first aspect, the present invention provides a traction device for PVC film processing, which adopts the following technical solution: A traction device for PVC film processing, comprising a middle plate, a first folding plate is arranged on the right side of the middle plate, a traction structure is arranged on the left side of the first folding plate, a second folding plate is arranged on the left side of the middle plate, a guide structure is arranged on the right side of the second folding plate, and the first folding plate and the second folding plate are arranged on the middle plate through the folding structure; The middle of the front and rear edges of the middle plate are connected to middle frames, a top roller is arranged at the top between the two middle frames, and two lower pressing rollers are arranged at both sides of the two middle frames through a retractable structure; The folding structure is installed on the middle plate at the first motor just below each middle frame, the top end of the first motor output shaft is connected with a screw, and the top end of the screw is rotatably connected to the upper inner wall of the corresponding middle frame, and the left and right side surfaces of the middle frame are provided with a first through slot, a lifting plate is movably passed through the first through slot, and a threaded slot for the screw to pass through is provided in the middle of the lifting plate, and the two ends of the lifting plate passing through the middle frame are rotatably connected with curved rods, one end of the two curved rods is rotatably connected to the first folding plate and the second folding plate respectively, and the first folding plate and the second folding plate are fixedly connected with rotating parts at the front and rear sides of the side close to the middle plate, and the rotating parts are rotatably installed on the middle plate.

[0005] Preferably, the retractable structure includes an inner frame installed on the inner side surfaces of the two middle frames near the top end, a cross bar is connected between the inner walls at both ends of the inner frame, vertical plates are movably mounted on the cross bar near the two ends, the rear side surfaces of the vertical plates are attached to the inner wall of the inner frame, and a cross bar is connected at a position near the top end of one side away from each other in each group of two vertical plates, the two ends of the lower pressure roller are respectively rotatably connected to the corresponding cross bar, a first guide groove is opened on each of the vertical plates, and the first guide groove is in an "S" shape, and insertion rods are connected at both ends of the lifting plate near one side of the vertical plate, and one end of the insertion rod is movably inserted into the corresponding first guide groove.

[0006] Preferably, the guide structure includes a right side plate connected to the front and rear edges of the right side of the first folding plate, two guide rollers are arranged between the two right side plates, two ends of the lower guide roller are rotatably connected to the two right side plates, a second through slot is opened at a position near the top of each right side plate, a first vertical rod is connected between the upper and lower end slot walls of the second through slot, a lifting block is movably sleeved on the first vertical rod, two ends of the upper guide roller are rotatably connected to the two lifting blocks, each of the first vertical rods is sleeved with a first spring, two ends of the first spring are respectively connected to the lifting block and the upper slot wall of the second through slot, and a flattening structure is arranged in the middle of the top of the first folding plate.

[0007] Preferably, the flattening structure includes two fixed plates connected to the first folding plate near the middle front and rear edges, two third through slots are respectively provided on the left and right sides of the two fixed plates close to one side, and extrusion plates are slidably arranged in the two third through slots at the same height position, and both end faces of each extrusion plate are inclined toward the middle, and multiple flattening rollers are rotatably installed between the front and rear extrusion plates of each group, and a second vertical rod is connected between the upper and lower end groove walls of each of the third through slots, and the second vertical rod movably passes through the through hole provided on the extrusion plate, and each of the second vertical rods is sleeved with a second spring, and the two ends of the second spring are respectively connected to the extrusion plate and one end groove wall of the third through slot, and a membrane penetration structure is arranged in the middle of the two fixed plates.

[0008] Preferably, the membrane-penetrating structure includes a transverse groove provided on two fixed plates, the transverse groove is located between the upper and lower groups of flattening rollers, traction blocks are slidably arranged in the two transverse grooves, extrusion blocks are installed on the side surfaces of the two traction blocks close to each other, the corners on the extrusion blocks are inclined surfaces, a fourth through groove is provided on the extrusion block and the traction block, a traction strip is fixedly installed on the lower groove wall of the fourth through groove, a clamping structure is provided on the traction strip, and grip frames are installed on both ends of the traction strip passing through the traction block.

[0009] Preferably, the clamping structure includes a clamping plate which is movably inserted into the fourth through grooves on the two traction blocks, and handles are connected to both ends of the clamping plate inserted into the grip frame. A third vertical rod is connected to the side of the inner wall on the upper and lower sides of each grip frame away from the fixed plate, and the third vertical rod movably passes through the handle. A third spring is sleeved on the third vertical rod, and both ends of the third spring are respectively connected to the handle and the upper inner wall of the grip frame.

[0010] Preferably, the traction structure includes two left sides panels installed on the second folding plate near the left front edge, a traction roller is rotatably installed between the two left sides panels, a second motor is installed at the top of the front side of the left side panel, one end of the output shaft of the second motor is connected to the traction roller, and a cutting structure is arranged on the second folding plate near the right side.

[0011] Preferably, the cutting structure includes a cutting table installed on the second folding plate near the right side, and middle strips are movably passed through the middle front and rear edges of the cutting table, a top strip is connected between the top ends of the two middle strips, and a cutting knife is installed in the middle of the bottom of the top strip, and a driving plate is connected to the bottom ends of the two middle strips, and a second guide groove is opened on the driving plate, and the second guide groove is in an "S" shape, and the cutting table is provided with a clamping and limiting structure.

[0012] Preferably, the clamping and limiting structure includes two right-side bars that movably pass through the front and rear edges of the right side of the cutting table, a clamping roller is rotatably installed between the top ends of the two right-side bars, two left-side bars that movably pass through the front and rear edges of the left side of the cutting table, a fastening roller is rotatably installed between the top ends of the two left-side bars, and fifth through-slots are provided on the left and right sides of the cutting table at the positions of the left and right bars, a first driving bar that passes through the corresponding fifth through-slot is connected at the bottom end of the left side of each of the right-side bars, and a second driving bar that passes through the corresponding fifth through-slot is connected at the bottom end of the right side of each of the left-side bars, a third guide slot is provided on the first driving bar, and the right end of the third guide slot is in a "Z" shape, a fourth guide slot is provided on the second driving bar, and the left side of the fourth guide slot is in a "Z" shape, an electric telescopic rod is installed at a position near the bottom of the right side of the cutting table, and a through rod is installed on one end of the output shaft of the electric telescopic rod inserted into the cutting table, and the through rod movably passes through the second guide slot, the third guide slot and the fourth guide slot respectively.

[0013] In a second aspect, the present application provides a traction method for PVC film processing, which adopts the following technical solution: A traction method for PVC film processing comprises the following steps: Step 1: First, a folded first folding plate and a second folding plate are placed on both sides of the middle plate through a folding structure; Step 2: Pass one end of the film to be pulled through the guide structure, clamp one end of the film through the clamping structure, use the film-penetrating structure to drive the film to pass through the flattening structures, and then release the clamping structure; Step 3: Pass the film around from under the lower pressure roller and then from above the top roller to increase the tension of the film during the traction process; Step 4: Pass the film around the clamping roller and the tightening roller of the clamping limit structure; Step 5: Finally, one end of the film is wound onto the traction structure for traction.

[0014] In summary, the present invention includes the following beneficial technical effects: The middle plate of the present invention is provided with a folding structure of a first folding plate and a second folding plate, and a retracting structure is provided on the folding structure for retracting two lower pressing rollers. When the device needs to be stored or transported, the folding structure and the retracting structure are only required to drive the two lower pressing rollers to close, and the first folding plate and the second folding plate are rotated and folded to the two sides of the middle plate, thereby greatly reducing the occupied space of the device and facilitating storage or transportation. The present invention provides a flattening structure, a clamping structure and a film-penetrating structure on the first folding plate, and utilizes a plurality of flattening rollers on the flattening structure to flatten the film during the film-pulling process, thereby improving the traction work quality, and utilizes the clamping structure to clamp one end of the film, and cooperates with the film-penetrating structure to facilitate driving the film to pass through the flattening roller; The present invention provides a cutting structure on the second folding plate, which facilitates the cutting of the film, and provides a clamping and limiting structure on the cutting table of the cutting structure. During the cutting process, the two ends of the film to be cut can be automatically clamped, thereby reducing the problem of film deformation caused by cutting, and also preventing the end of the remaining film after cutting from directly falling onto the second folding plate and getting dirty. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 is a schematic structural diagram of the middle plate in an embodiment of the present invention; Figure 3 is a schematic structural diagram of the first folding plate in an embodiment of the present invention; Figure 4 is a schematic structural diagram of a fixed plate in an embodiment of the present invention; Figure 5 In the embodiment of the present invention Figure 4 A magnified view of the structure at A; Figure 6 is a schematic structural diagram of the second folding plate in an embodiment of the present invention; Figure 7 is a schematic structural diagram of a cutting table in an embodiment of the present invention; Figure 8 It is a schematic diagram of the structure after the driving plate on the cutting table is disassembled in an embodiment of the present invention.

[0016] Explanation of reference numerals: 1. middle plate; 2. first folding plate; 3. second folding plate; 4. middle frame; 5. top roller; 6. lower pressure roller; 7. lifting plate; 8. curved rod; 9. rotating member; 10. first motor; 11. first through slot; 12. screw rod; 13. inner frame; 14. cross bar; 15. vertical plate; 16. horizontal bar; 17. first guide slot; 18. insertion rod; 19. right side plate; 20. guide roller; 21. first spring; 22. first vertical rod; 23. lifting block; 24. second through slot; 25. fixed plate; 26. extrusion plate; 27. flattening roller; 28. third through slot; 29. ​​second vertical rod; 30. second spring; 31. grip Frame; 32, traction bar; 33, traction block; 34, transverse groove; 35, extrusion block; 36, fourth through groove; 37, clamping plate; 38, handle; 39, third vertical rod; 40, third spring; 41, left side plate; 42, traction roller; 43, second motor; 44, cutting table; 45, middle bar; 46, top bar; 47, cutting knife; 48, driving plate; 49, second guide groove; 50, through rod; 51, electric telescopic rod; 52, right side bar; 53, clamping roller; 54, left side bar; 55, tightening roller; 56, fifth through groove; 57, first driving bar; 58, third guide groove; 59, second driving bar; 60, fourth guide groove. DETAILED DESCRIPTION

[0017] The following is combined with Figure 1-Figure 8 The present invention is described in further detail.

[0018] The embodiment of the invention discloses a traction device for PVC film processing.

[0019] A traction device for PVC film processing, comprising an intermediate plate 1, a first folding plate 2 is arranged on the right side of the intermediate plate 1, a traction structure is arranged on the left side of the first folding plate 2, a second folding plate 3 is arranged on the left side of the intermediate plate 1, a guide structure is arranged on the right side of the second folding plate 3, the first folding plate 2 and the second folding plate 3 are arranged on the intermediate plate 1 through the folding structure; the middle of the front and rear edges of the intermediate plate 1 are connected to intermediate frames 4, the top end between the two intermediate frames 4 is provided with a top roller 5, and two lower pressing rollers 6 are arranged on both sides of the two intermediate frames 4 through a retractable structure; the folding structure is installed on the intermediate plate 1 at a position directly below each intermediate frame 4 A first motor 10, a screw rod 12 is connected to the top end of the output shaft of the first motor 10, and the top end of the screw rod 12 is rotatably connected to the upper inner wall of the corresponding intermediate frame 4. First through slots 11 are provided on both left and right side surfaces of the intermediate frame 4, and a lifting plate 7 is movably passed through the first through slot 11. A threaded groove for the screw rod 12 to pass through is provided in the middle of the lifting plate 7. Both ends of the lifting plate 7 passing through the intermediate frame 4 are rotatably connected to bent rods 8, and one end of the two bent rods 8 is rotatably connected to the first folding plate 2 and the second folding plate 3 respectively. The first folding plate 2 and the second folding plate 3 are fixedly connected to the front and rear sides of the middle plate 1, and the rotating member 9 is rotatably installed on the middle plate 1; The retractable structure includes an inner frame 13 installed on the inner side surface of the two middle frames 4 near the top position, a cross bar 14 is connected between the inner walls at both ends of the inner frame 13, and vertical plates 15 are movably sleeved at the positions near the two ends of the cross bar 14. The rear side of the vertical plate 15 is attached to the inner wall of the inner frame 13, and each group of two vertical plates 15 is connected to a cross bar 16 at a position near the top of one side away from each other. The two ends of the lower pressure roller 6 are rotatably connected to the corresponding cross bar 16, and each vertical plate 15 is provided with a first guide groove 17, and the first guide groove 17 is in an "S" shape. The lifting plate 7 is connected to the two ends of one side of the vertical plate 15 with an insertion rod 18, and one end of the insertion rod 18 is movably inserted into the corresponding first guide groove 17. When the equipment needs to be stored or transported, the first motor 10 on the middle plate 1 can be started to drive the screw 12 to rotate, and the lifting plate 7 moves upward on the rotating screw 12, and the first folding plate 2 and the second folding plate 3 are pulled from both sides of the middle plate 1 through the curved rod 8, so that the first folding plate 2 and the second folding plate 3 are rotated to both sides of the middle plate 1 to perform these, and in the process of moving upward, the lifting plate 7 drives one end of the insertion rod 18 to slide upward in the first guide groove 17 of the vertical plate 15, and the insertion rod 18 squeezes the groove wall of the first guide groove 17, pushing the vertical plate 15 to move toward the middle, thereby driving the two lower pressure rollers 6 to automatically close toward the middle, so as to reduce the occupied space of the equipment and facilitate storage or transportation.

[0020] See also Figure 1 , Figure 3 , Figure 4 and Figure 5 The guide structure includes a right side plate 19 connected to the front and rear edges of the right side of the first folding plate 2, two guide rollers 20 are arranged between the two right side plates 19, and the two ends of the lower guide roller 20 are respectively rotatably connected to the two right side plates 19, and a second through slot 24 is opened near the top of each right side plate 19, and a first vertical rod 22 is connected between the upper and lower groove walls of the second through slot 24, and a lifting block 23 is movably sleeved on the first vertical rod 22, and the two ends of the upper guide roller 20 are respectively rotatably connected to the two lifting blocks 23, and each first vertical rod 22 is sleeved with a first spring 21, and the two ends of the first spring 21 are respectively connected to the lifting block 23 and the upper groove wall of the second through slot 24, and a flattening structure is arranged in the middle of the upper part of the first folding plate 2, so that the film passes through the two guide rollers 20, and the elastic force of the first spring 21 pushes the upper guide roller 20 to clamp the film on the lower guide roller 20, thereby guiding the film in the process of pulling the film; The flattening structure includes two fixed plates 25 connected to the first folding plate 2 near the middle front and rear edges, two third through slots 28 are respectively provided on the left and right sides of the two fixed plates 25 near one side, and extrusion plates 26 are respectively slidably provided in the two third through slots 28 at the same height position, and both end faces of each extrusion plate 26 are inclined surfaces inclined toward the middle, and a plurality of flattening rollers 27 are respectively rotatably installed between each group of front and rear extrusion plates 26, and a second vertical rod 29 is connected between the upper and lower end groove walls of each third through slot 28, and the second vertical rod 29 movably passes through the through hole provided on the extrusion plate 26, and each second vertical rod 29 is sleeved with a second spring 30, and the two ends of the second spring 30 are respectively connected to the extrusion plate 26 and one end groove wall of the third through slot 28, and a membrane-penetrating structure is provided in the middle of the two fixed plates 25; The membrane-penetrating structure includes a transverse groove 34 provided on the two fixed plates 25, the transverse groove 34 is located between the upper and lower groups of flattening rollers 27, and traction blocks 33 are slidably provided in the two transverse grooves 34, and extrusion blocks 35 are installed on the side surfaces of the two traction blocks 33 close to each other, and the corners of the extrusion blocks 35 are inclined surfaces, and fourth through grooves 36 are provided on the extrusion blocks 35 and the traction blocks 33, and a traction bar 32 is fixedly installed on the lower groove wall of the fourth through groove 36, and a clamping structure is provided on the traction bar 32, and grip frames 31 are installed on both ends of the traction bar 32 passing through the traction blocks 33; The clamping structure includes a clamping plate 37 that is movably inserted into the fourth through slots 36 on the two traction blocks 33. The two ends of the clamping plate 37 inserted into the grip frame 31 are connected with grips 38. The inner walls of the upper and lower sides of each grip frame 31 are connected with a third vertical rod 39 on one side away from the fixed plate 25. The third vertical rod 39 movably passes through the grip 38. A third spring 40 is sleeved on the third vertical rod 39. The two ends of the third spring 40 are respectively connected to the grip 38 and the upper inner wall of the grip frame 31. The grip 38 is lifted in the grip frame 31, and the clamping plate 37 is lifted from the traction bar 32 to drive the third spring 40 to compress, so that one end of the film is placed on the traction bar 32, and the grip 38 is released. Under the elastic force of the third spring 40, the clamping plate 37 is pushed to clamp one end of the film on the traction bar 32, and then the grip frame 31 is used to drive the traction block 33 to drive one end of the film toward the side of the middle plate 1. During the movement of the traction block 33, the extrusion block 35 is driven to squeeze the extrusion plate 26, thereby pushing the upper and lower groups of flattening rollers 27 to move away from each other, squeezing the second spring 30 to be compressed. When the extrusion block 35 moves out from one end of the extrusion plate 26, the elastic force of the second spring 30 is used to push the two groups of flattening rollers 27 to return to their original position to clamp the film. In the process of traction of the film, the film is flattened to improve the quality of traction.

[0021] See also Figure 1 , Figure 6 , Figure 7 and Figure 8 The traction structure includes two left-side plates 41 installed on the second folding plate 3 near the left front edge, a traction roller 42 is rotatably installed between the two left-side plates 41, a second motor 43 is installed at the top of the front side of the left-side plate 41, one end of the output shaft of the second motor 43 is connected to the traction roller 42, and a cutting structure is provided on the second folding plate 3 near the right side. After one end of the film is wound onto the traction roller 42, the second motor 43 can be started to drive the traction roller 42 to rotate, so as to traction the film; The cutting structure includes a cutting table 44 installed on the second folding plate 3 near the right side. A middle bar 45 is movably passed through the front and rear edges of the middle of the cutting table 44. A top bar 46 is connected between the top ends of the two middle bars 45. A cutting knife 47 is installed in the middle of the bottom of the top bar 46. A driving plate 48 is connected to the bottom ends of the two middle bars 45. A second guide groove 49 is opened on the driving plate 48. The second guide groove 49 is in an "S" shape. The cutting table 44 is provided with a clamping and limiting structure. The clamping and limiting structure includes two right side bars 52 that movably pass through the front and rear edges of the right side of the cutting table 44, and a clamping roller 53 is rotatably installed between the tops of the two right side bars 52. Two left side bars 54 are movably passed through the front and rear edges of the left side of the cutting table 44, and a fastening roller 55 is rotatably installed between the tops of the two left side bars 54. The left and right sides of the cutting table 44 are both provided with fifth through grooves 56 at the positions of the left side bars 54 and the right side bars 52. The bottom end of the left side of each right side bar 52 is connected to a fifth through groove 56 that passes through the corresponding fifth through groove 56. The first driving bar 57 of the five-way slot 56, the bottom end of each left side bar 54 on the right side is connected to a second driving bar 59 passing through the corresponding fifth through slot 56, the first driving bar 57 is provided with a third guide slot 58, the right end of the third guide slot 58 is in a "Z" shape, the second driving bar 59 is provided with a fourth guide slot 60, the left side of the fourth guide slot 60 is in a "Z" shape, the electric telescopic rod 51 is installed at a position near the bottom of the right side of the cutting table 44, and the output shaft of the electric telescopic rod 51 is inserted into one end of the cutting table 44 A through rod 50 is installed on the top, and the through rod 50 is movable through the second guide groove 49, the third guide groove 58 and the fourth guide groove 60 respectively. When it is necessary to cut the film, the electric telescopic rod 51 is started to drive the end of the through rod 50 to slide in the second guide groove 49 of the driving plate 48. The through rod 50 squeezes the groove wall of the second guide groove 49 downward, driving the cutting knife 47 on the top bar 46 of the middle bar 45 to move downward. At the same time, the through rod 50 first moves in the third guide groove 58 on the first driving bar 57. The through rod 50 slides at the inclined groove wall and pulls the clamping roller 53 downward through the right side bar 52, pressing the film on one side of the cutting knife 47 to prevent the film from falling directly onto the middle plate 1 and getting dirty after cutting. As the through rod 50 continues to move, the through rod 50 moves to the inclined groove wall of the fourth guide groove 60 on the second driving bar 59, pulling the fastening roller 55 at the top of the left side bar 54 downward and pressing the film on the other side of the cutting knife 47. Finally, the cutting knife 47 continues to move downward to cut the film on the cutting table 44.

[0022] The embodiment of the present invention also discloses a pulling method for PVC film processing, comprising the following steps: Step 1: First, put down the folded first folding plate 2 and the second folding plate 3 on both sides of the middle plate 1 through the folding structure; Step 2: Pass one end of the film to be pulled through the guide structure, clamp one end of the film through the clamping structure, use the film-penetrating structure to drive the film to pass through the flattening structures, and then release the clamping structure; Step 3: The film is passed around from below the lower pressure roller 6 and then passed around from above the top roller 5 to increase the tension of the film during the traction process; Step 4: Pass the film around the clamping roller 53 and the fastening roller 55 of the clamping and limiting structure; Step 5: Finally, one end of the film is wound onto the traction structure for traction.

[0023] The implementation principle of a traction device and method for PVC film processing according to an embodiment of the present invention is as follows: when traction of the film, first, lift the grip 38 in the grip frame 31, lift the clamping plate 37 from the traction bar 32, drive the third spring 40 to compress, place one end of the film on the traction bar 32, release the grip 38, and under the elastic force of the third spring 40, push the clamping plate 37 to clamp one end of the film on the traction bar 32, and then use the grip frame 31 to drive the traction block 33 to drive one end of the film toward one side of the middle plate 1. During the movement of the traction block 33, the extrusion block 35 is driven to squeeze the extrusion plate 26, thereby pushing the upper and lower sets of flattening rollers 27 to move away from each other, squeezing the second spring 30 to compress, and when the extrusion block 35 is moved from the extrusion plate 26, the extrusion block 35 is moved from the extrusion plate 26 to the extrusion plate 26. When one end of the plate 26 moves out, the elastic force of the second spring 30 is used to push the two sets of flattening rollers 27 to reset to clamp the film, and then the included end is bypassed from the bottom of the lower pressure roller 6 and the top of the top roller 5 to increase the tension during the film traction process, and then the film is passed from under the clamping roller 53 and the fastening roller 55, and finally one end of the film is wound onto the traction roller 42, and the second motor 43 is started to drive the traction roller 42 to rotate to achieve the traction of the film. When it is necessary to cut the film, the electric telescopic rod 51 is started to drive the end of the through rod 50 to slide in the second guide groove 49 of the driving plate 48, and the through rod 50 squeezes the groove wall of the second guide groove 49 downward, driving the cutting knife 4 on the top strip 46 of the middle strip 45. 7 moves downward. At the same time, the penetration rod 50 first slides at the inclined groove wall of the third guide groove 58 on the first driving bar 57, and pulls the clamping roller 53 downward through the right bar 52 to press the film on one side of the cutting knife 47 to prevent the film from falling directly onto the middle plate 1 and getting dirty after cutting. As the penetration rod 50 continues to move, the penetration rod 50 moves to the inclined groove wall of the fourth guide groove 60 on the second driving bar 59, pulling the fastening roller 55 at the top of the left bar 54 to move downward, and presses the film on the other side of the cutting knife 47. Finally, the cutting knife 47 continues to move downward to cut the film on the cutting table 44. After cutting, the electric telescopic rod 51 drives the penetration rod 50 to move in the opposite direction. During the reverse movement of the penetration rod 50, it drives the cutting knife 47 to move downward. The cutting knife 47 moves upward and moves upward to loosen the tightening roller 55. At this time, the clamping roller 53 is still in a state of being pressed against one end of the film on the cutting table 44. In this way, the traction roller 42 can be replaced. After replacing the traction roller 42, the clamping roller 53 is manually pulled to clamp one end of the film, and the cutting knife 47 continues to move upward to drive the clamping roller 53 to move upward to loosen the film, and rewind one end of the film onto the traction roller 42 to continue the traction work. When the equipment needs to be stored or transported, the first motor 10 is started to drive the screw 12 to rotate, and the lifting plate 7 moves upward on the middle frame 4. The first folding plate 2 and the second folding plate 3 are respectively pulled up from both sides of the middle frame 4 by the curved rod 8 to fold the equipment, thereby reducing the occupied space of the equipment and facilitating storage or transportation.When the first folding plate 2 and the second folding plate 3 are turned, the first folding plate 2 drives the two right side plates 19 to rotate as a whole to the top of the top roller 5, the fixed plate 25 on the first folding plate 2 rotates as a whole to the position between the middle frame 4 and below the lower pressure roller 6, the left side plate 41 on the second folding plate 3 rotates to the position between the top roller 5 and the lower pressure roller 6, and the cutting table 44 rotates as a whole to the position between the middle frame 4 and below the lower pressure roller 6, so as to avoid the problem of mutual interference between the components on the first folding plate 2 and the second folding plate 3 during the folding process, and the structure is simple and the function is practical.

[0024] The above are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A pulling device for PVC film processing, comprising an intermediate plate (1), characterized in that: A first folding plate (2) is arranged on the right side of the middle plate (1), a traction structure is arranged on the left side of the first folding plate (2), a second folding plate (3) is arranged on the left side of the middle plate (1), a guide structure is arranged on the right side of the second folding plate (3), and the first folding plate (2) and the second folding plate (3) are arranged on the middle plate (1) via the folding structure; The middle of the front and rear edges of the middle plate (1) are connected to middle frames (4), a top roller (5) is arranged at the top between the two middle frames (4), and two lower pressure rollers (6) are arranged on both sides of the two middle frames (4) via a retractable structure; The folding structure is mounted on a first motor (10) located directly below each intermediate frame (4) on the intermediate plate (1). The top end of the output shaft of the first motor (10) is connected to a screw rod (12). The top end of the screw rod (12) is rotatably connected to the upper inner wall of the corresponding intermediate frame (4). The left and right side surfaces of the intermediate frame (4) are both provided with first through slots (11). A lifting plate (7) movably passes through the first through slots (11). A threaded slot for the screw rod (12) to pass through is provided in the middle of the lifting plate (7). Both ends of the lifting plate (7) passing through the intermediate frame (4) are rotatably connected to bent rods (8). One end of the two bent rods (8) is rotatably connected to the first folding plate (2) and the second folding plate (3). The first folding plate (2) and the second folding plate (3) are both fixedly connected to rotating members (9) at the front and rear sides of the first folding plate (2) and the second folding plate (3) near the intermediate plate (1). The rotating member (9) is rotatably mounted on the intermediate plate (1).

2. A traction device for PVC film processing according to claim 1, characterized in that: The retractable structure comprises an inner frame (13) mounted on the inner side surface of the two intermediate frames (4) near the top end, a cross bar (14) is connected between the inner walls at both ends of the inner frame (13), vertical plates (15) are movably sleeved on the cross bar (14) near the two ends, the rear side surface of the vertical plate (15) is attached to the inner wall of the inner frame (13), and each group of two vertical plates (15) are connected to a cross bar (16) at a position near the top end of a side away from each other, the two ends of the lower pressure roller (6) are rotatably connected to the corresponding cross bar (16), each vertical plate (15) is provided with a first guide groove (17), the first guide groove (17) is in an "S" shape, and the lifting plate (7) is connected to an insertion rod (18) at both ends of a side surface near the vertical plate (15), and one end of the insertion rod (18) is movably inserted into the corresponding first guide groove (17).

3. The traction device for PVC film processing according to claim 1, characterized in that: The guide structure comprises a right side plate (19) connected to the front and rear edges of the right side of the first folding plate (2); two guide rollers (20) are arranged between the two right side plates (19); the two ends of the lower guide roller (20) are respectively rotatably connected to the two right side plates (19); a second through slot (24) is provided near the top of each right side plate (19); a first vertical rod (22) is connected between the upper and lower groove walls of the second through slot (24); a lifting block (23) is movably sleeved on the first vertical rod (22); the two ends of the upper guide roller (20) are respectively rotatably connected to the two lifting blocks (23); each of the first vertical rods (22) is sleeved with a first spring (21); the two ends of the first spring (21) are respectively connected to the lifting block (23) and the upper groove wall of the second through slot (24); and a flattening structure is arranged in the middle of the upper side of the first folding plate (2).

4. The traction device for PVC film processing according to claim 3, characterized in that: The flattening structure comprises two fixed plates (25) connected to the first folding plate (2) near the middle front and rear edges, two third through slots (28) are respectively provided at the left and right sides of a side surface of the two fixed plates (25) near each other, and a pressing plate (26) is respectively slidably provided in the two third through slots (28) at the same height position, and both end surfaces of each pressing plate (26) are inclined surfaces inclined toward the middle, and a plurality of flattening rollers (27) are respectively rotatably installed between the front and rear two pressing plates (26) of each group, and a second vertical rod (29) is connected between the upper and lower end groove walls of each third through slot (28), and the second vertical rod (29) movably passes through a through hole provided on the pressing plate (26), and each second vertical rod (29) is sleeved with a second spring (30), and the two ends of the second spring (30) are respectively connected to the pressing plate (26) and one end groove wall of the third through slot (28), and a membrane-penetrating structure is provided in the middle of the two fixed plates (25).

5. The traction device for PVC film processing according to claim 4, characterized in that: The membrane-penetrating structure comprises a transverse groove (34) formed on two fixed plates (25), the transverse groove (34) being located between the upper and lower groups of flattening rollers (27), a traction block (33) being slidably arranged in each of the two transverse grooves (34), an extrusion block (35) being installed on one side surface of the two traction blocks (33) close to each other, the corners of the extrusion blocks (35) being inclined surfaces, a fourth through groove (36) being formed on each of the extrusion blocks (35) and the traction blocks (33), a traction bar (32) being fixedly installed on the lower groove wall of the fourth through groove (36), a clamping structure being arranged on the traction bar (32), and a gripping frame (31) being installed on both ends of the traction bar (32) passing through the traction block (33).

6. A traction device for PVC film processing according to claim 5, characterized in that: The clamping structure comprises a clamping plate (37) movably inserted into the fourth through slots (36) on the two traction blocks (33); both ends of the clamping plate (37) inserted into the gripping frame (31) are connected to grips (38); a third vertical rod (39) is connected to the inner wall of the upper and lower sides of each gripping frame (31) at a side away from the fixed plate (25); the third vertical rod (39) movably passes through the gripping handle (38); a third spring (40) is sleeved on the third vertical rod (39); and both ends of the third spring (40) are respectively connected to the gripping handle (38) and the upper inner wall of the gripping frame (31).

7. The traction device for PVC film processing according to claim 1, characterized in that: The traction structure comprises two left side plates (41) mounted on the second folding plate (3) near the left front edge, a traction roller (42) is rotatably mounted between the two left side plates (41), a second motor (43) is mounted at the top end of the front side of the left side plate (41), one end of the output shaft of the second motor (43) is connected to the traction roller (42), and a cutting structure is arranged on the second folding plate (3) near the right side.

8. The traction device for PVC film processing according to claim 7, characterized in that: The cutting structure comprises a cutting table (44) mounted on the second folding plate (3) near the right side, a middle strip (45) movably passing through the front and rear edges in the middle of the cutting table (44), a top strip (46) connected between the top ends of two middle strips (45), a cutting knife (47) mounted in the middle of the bottom of the top strip (46), a driving plate (48) connected to the bottom ends of the two middle strips (45), a second guide groove (49) formed on the driving plate (48), the second guide groove (49) being in an "S" shape, and the cutting table (44) is provided with a clamping and limiting structure.

9. The traction device for PVC film processing according to claim 8, characterized in that: The clamping and limiting structure comprises two right side bars (52) movably passing through the front and rear edges on the right side of the cutting table (44); a clamping roller (53) is rotatably installed between the top ends of the two right side bars (52); two left side bars (54) movably passing through the front and rear edges on the left side of the cutting table (44); a fastening roller (55) is rotatably installed between the top ends of the two left side bars (54); fifth through slots (56) are provided on the left and right sides of the cutting table (44) at the positions of the left side bars (54) and the right side bars (52); a first driving bar (57) passing through the corresponding fifth through slot (56) is connected to the bottom end of the left side of each right side bar (52); and a first driving bar (57) passing through the corresponding fifth through slot (56) is provided on the right side of each left side bar (54). The bottom ends are connected to a second driving bar (59) passing through the corresponding fifth through slot (56); the first driving bar (57) is provided with a third guide slot (58); the right end of the third guide slot (58) is in a "Z" shape; the second driving bar (59) is provided with a fourth guide slot (60); the left side of the fourth guide slot (60) is in a "Z" shape; an electric telescopic rod (51) is installed at a position close to the bottom of the right side of the cutting table (44); a through rod (50) is installed at one end of the output shaft of the electric telescopic rod (51) inserted into the cutting table (44); the through rod (50) is movably passed through the second guide slot (49), the third guide slot (58) and the fourth guide slot (60).

10. A pulling method for PVC film processing, characterized in that: The wind turbine gear blank cutting method uses a traction device for PVC film processing as described in any one of claims 1 to 9, comprising the following steps: Step 1: First, a folded first folding plate (2) and a second folding plate (3) are placed on both sides of the middle plate (1) through a folding structure; Step 2: Pass one end of the film to be pulled through the guide structure, clamp one end of the film through the clamping structure, use the film-penetrating structure to drive the film to pass through the flattening structures, and then release the clamping structure; Step 3: The film is passed around from below the lower pressure roller (6) and then passed around from above the top roller (5) to increase the tension of the film during the traction process; Step 4: The film is passed around under the clamping roller (53) and the fastening roller (55) of the clamping and limiting structure; Step 5: Finally, one end of the film is wound onto the traction structure for traction.

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