A traction device and method for PVC film processing

Abstract

The present invention relates to the field of PVC film processing, and discloses a traction device and method for PVC film processing, including an intermediate plate. A first folding plate is arranged on the right side of the intermediate plate, and a traction structure is arranged at the left side above the first folding plate. A second folding plate is arranged on the left side of the intermediate plate, and a guiding structure is arranged at the right side above the second folding plate. The first folding plate and the second folding plate are arranged on the intermediate plate through a folding structure. When the device needs to be stored or transported, only under the action of the folding structure and the retracting and releasing structure, the two pressing rollers are driven to close together, and the first folding plate and the second folding plate are rotated and folded to both sides of the intermediate plate, greatly reducing the occupied space of the device and facilitating storage or transportation.

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;

[0003] 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;

[0004] 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

[0005] 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.

[0006] In a first aspect, the present invention provides a traction device for PVC film processing, which adopts the following technical solution:

[0007] 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;

[0008] 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;

[0009] A first motor of the folding structure is installed above the middle plate and directly below each middle rack. The top end of the output shaft of the first motor is connected to a screw rod, and the top end of the screw rod is rotatably connected to the upper inner wall of the corresponding middle rack. First through grooves are formed on both the left and right side surfaces of the middle rack, and a lifting plate movably passes through the first through grooves. A threaded groove for the screw rod to pass through is formed in the middle of the lifting plate. Curved rods are rotatably connected to both ends of the lifting plate that extend out of the middle rack, and one ends of the two curved rods are respectively rotatably connected to a first folding plate and a second folding plate. Rotating members are fixedly connected to the front and rear sides of the first folding plate and the second folding plate close to the middle plate side, and the rotating members are rotatably installed on the middle plate.

[0010] Preferably, the retracting and extending structure includes an inner frame installed at positions close to the top ends on the inner side surfaces of two middle racks. A cross bar is connected between the inner walls at both ends of the inner frame. Vertical plates are movably sleeved on the cross bar near both ends. The rear side surfaces of the vertical plates are attached to the inner walls of the inner frame. Cross bars are connected to positions close to the top ends on the mutually remote side surfaces of each group of two vertical plates. The two ends of the lower pressing roller are respectively rotatably connected to the corresponding cross bars. First guiding grooves are formed on each vertical plate, and the first guiding grooves are in an "S" shape. Plug rods are connected to both ends of the side surface of the lifting plate close to the vertical plate, and one ends of the plug rods movably insert into the corresponding first guiding grooves.

[0011] Preferably, the guiding structure includes right side plates connected to the front and rear edges on the right side of the first folding plate. Two guiding rollers are arranged between the two right side plates. The two ends of the lower guiding roller are respectively rotatably connected to the two right side plates. Second through grooves are formed at positions close to the top ends on each right side plate. First vertical rods are connected between the upper and lower groove walls of the second through grooves. Lifting blocks are movably sleeved on the first vertical rods. The two ends of the upper guiding roller are respectively rotatably connected to the two lifting blocks. First springs are sleeved on each first vertical rod, and the two ends of the first springs are respectively connected to the lifting blocks and the upper groove walls of the second through grooves. A flattening structure is arranged in the middle of the upper surface of the first folding plate.

[0012] Preferably, the flattening structure includes two fixing plates connected to the upper surface of the first folding plate near the front and rear edges of the middle. Two third through grooves are respectively formed on the left and right sides of the side surfaces of the two fixing plates close to each other. Squeezing plates are respectively slidably arranged in the two third through grooves at the same height position. The end surfaces of both ends of each squeezing plate are inclined surfaces that incline towards the middle. A plurality of flattening rollers are respectively rotatably installed between each pair of front and rear squeezing plates. A second vertical rod is connected between the upper and lower end walls of each third through groove. The second vertical rod movably passes through a through hole formed in the squeezing plate. A second spring is sleeved on each second vertical rod. The two ends of the second spring are respectively connected to the squeezing plate and one end wall of the third through groove. A film-passing structure is arranged at the middle of the two fixing plates.

[0013] Preferably, the film-passing structure includes a transverse groove formed in the two fixing plates. The transverse groove is located between the upper and lower groups of flattening rollers. Traction blocks are respectively slidably arranged in the two transverse grooves. Squeezing blocks are respectively installed on the side surfaces of the two traction blocks close to each other. The corners of the squeezing blocks are all inclined surfaces. Fourth through grooves are formed in both the squeezing blocks and the traction blocks. A traction strip is fixedly installed on the lower groove wall of the fourth through groove. A clamping structure is arranged on the traction strip. Gripping frames are respectively installed at both ends of the traction strip passing through the traction block.

[0014] Preferably, the clamping structure includes clamping plates movably inserted into the fourth through grooves of the two traction blocks. Gripping handles are respectively connected to both ends of the clamping plates inserted into the gripping frames. Third vertical rods are respectively connected to the positions on the inner walls of the upper and lower sides of each gripping frame far from the fixing plates. The third vertical rods movably pass through the gripping handles. A third spring is sleeved on the third vertical rods. The two ends of the third spring are respectively connected to the gripping handle and the upper inner wall of the gripping frame.

[0015] Preferably, the traction structure includes two left side plates installed on the upper surface of the second folding plate near the front side edge of the left side. A traction roller is rotatably installed between the two left side plates. A second motor is installed at the top of the front left side plate. One end of the output shaft of the second motor is connected to the traction roller. A cutting structure is arranged at the position on the upper surface of the second folding plate close to the right side.

[0016] Preferably, the cutting structure includes a cutting table installed at the position on the upper surface of the second folding plate close to the right side. Middle strips respectively movably pass through the front and rear edges of the middle of the upper surface of the cutting table. A top strip is connected between the tops of the two middle strips. A cutting knife is installed at the middle of the lower surface of the top strip. Driving plates are respectively connected to the bottoms of the two middle strips. A second guiding groove is formed in the driving plate. The second guiding groove is in an "S" shape. The cutting table is provided with a clamping and limiting structure.

[0017] Preferably, the clamping and limiting structure includes two right-side bars movably passing through the front and rear edges on the right side of the upper surface of the cutting table. A clamping roller is rotatably installed between the tops of the two right-side bars. Two left-side bars movably pass through the front and rear edges on the left side of the upper surface of the cutting table. A fastening roller is rotatably installed between the tops of the two left-side bars. Fifth through grooves are provided on both the left and right sides of the cutting table at the positions of the left-side bars and the right-side bars. A first driving bar passing through the corresponding fifth through groove is connected to the bottom end on the left side of each right-side bar. A second driving bar passing through the corresponding fifth through groove is connected to the bottom end on the right side of each left-side bar. A third guiding groove is provided on the first driving bar. The right end of the third guiding groove is in a "Z" shape. A fourth guiding groove is provided on the second driving bar. The left side of the fourth guiding groove is in a "Z" shape. An electric telescopic rod is installed at a position near the lower part of the right side of the cutting table. A through rod is installed at one end of the output shaft of the electric telescopic rod inserted into the cutting table. The through rod movably passes through the second guiding groove, the third guiding groove, and the fourth guiding groove respectively.

[0018] Second, this application provides a traction method for PVC film processing, adopting the following technical solution:

[0019] A traction method for PVC film processing includes the following steps:

[0020] Step 1: First, put down the folded first folding plate and the second folding plate on both sides of the middle plate through the folding structure;

[0021] Step 2: Pass one end of the film to be traction through the guiding structure, clamp one end of the film through the clamping structure, drive the film to pass between the flattening structures by using the film-passing structure, and then loosen the clamping structure;

[0022] Step 3: Pass the film around the lower side of the lower pressing roller and then around the upper side of the top roller to increase the tension of the film during traction;

[0023] Step 4: Pass the film around the lower sides of the clamping roller and the fastening roller of the clamping and limiting structure;

[0024] Step 5: Finally, wind one end of the film onto the traction structure to carry out the traction work.

[0025] In summary, the present invention includes the following beneficial technical effects:

[0026] The middle plate of the present invention is provided with a folding structure including a first folding plate and a second folding plate, and a retracting structure is arranged on the folding structure for retracting and releasing two lower pressing rollers. When the equipment needs to be stored or transported, under the action of the folding structure and the retracting structure, the two lower pressing rollers are driven to close, and the first folding plate and the second folding plate are rotated and folded to both sides of the middle plate, greatly reducing the occupied space of the equipment and facilitating storage or transportation.

[0027] The present invention is provided with a flattening structure, a clamping structure and a film threading structure on the first folding plate. During the process of pulling the film, the multiple flattening rollers on the flattening structure can flatten the film, improving the quality of the pulling work. And one end of the film is clamped by the clamping structure, which, in cooperation with the film threading structure, facilitates driving the film through the flattening rollers.

[0028] The present invention is provided with a cutting structure on the second folding plate. The cutting structure facilitates the cutting work of the film, and a clamping and limiting structure is arranged on the cutting table of the cutting structure. During the cutting process, the two ends of the position of the film to be cut can be automatically pressed tightly, reducing the problem of the film being pulled and deformed due to cutting. At the same time, it can also prevent the problem that one end of the remaining film after cutting directly falls onto the second folding plate and gets dirty. Description of the Drawings

[0029] Figure 1 is the schematic diagram of the overall structure in the embodiment of the present invention;

[0030] Figure 2 is the schematic diagram of the structure at the middle plate in the embodiment of the present invention;

[0031] Figure 3 is the schematic diagram of the structure at the first folding plate in the embodiment of the present invention;

[0032] Figure 4 is the schematic diagram of the structure at the fixing plate in the embodiment of the present invention;

[0033] Figure 5 is in the embodiment of the present invention Figure 4 Enlarged view of the structure at A;

[0034] Figure 6 is the schematic diagram of the structure at the second folding plate in the embodiment of the present invention;

[0035] Figure 7 is the schematic diagram of the structure at the cutting table in the embodiment of the present invention;

[0036] Figure 8 is the schematic diagram of the structure after the driving plate on the cutting table in the embodiment of the present invention is disassembled.

[0037] Description of reference numerals: 1, intermediate plate; 2, first folding plate; 3, second folding plate; 4, intermediate frame; 5, top roller; 6, lower pressing roller; 7, lifting plate; 8, curved rod; 9, rotating member; 10, first motor; 11, first through groove; 12, screw rod; 13, inner frame; 14, cross bar; 15, vertical plate; 16, cross strip; 17, first guiding groove; 18, inserting rod; 19, right side plate; 20, guiding roller; 21, first spring; 22, first vertical rod; 23, lifting block; 24, second through groove; 25, fixing plate; 26, pressing plate; 27, flattening roller; 28, third through groove; 29, second vertical rod; 30, second spring; 31, holding frame; 32, traction strip; 33, traction block; 34, cross groove; 35, pressing 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, intermediate strip; 46, top strip; 47, cutting knife; 48, driving plate; 49, second guiding groove; 50, penetrating rod; 51, electric telescopic rod; 52, right side strip; 53, clamping roller; 54, left side strip; 55, fastening roller; 56, fifth through groove; 57, first driving strip; 58, third guiding groove; 59, second driving strip; 60, fourth guiding groove. Detailed implementation mode

[0038] The following is further detailed description of the present invention in combination with the attached Figures 1-8 drawings.

[0039] An embodiment of the present invention discloses a traction device for PVC film processing.

[0040] A traction device for PVC film processing, including 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 at the left side above the first folding plate 2. A second folding plate 3 is arranged on the left side of the intermediate plate 1. A guiding structure is arranged at the right side above the second folding plate 3. The first folding plate 2 and the second folding plate 3 are arranged on the intermediate plate 1 through a folding structure; at the middle of the front and rear edges on the upper surface of the intermediate plate 1, intermediate frames 4 are connected. At the top between the two intermediate frames 4, a top roller 5 is arranged. At the two sides of the two intermediate frames 4, two lower pressing rollers 6 are arranged through a retracting and releasing structure; the folding structure is installed on the upper surface of the intermediate plate 1 at the position directly below each intermediate frame 4, a first motor 10. The top of the output shaft of the first motor 10 is connected with a screw rod 12. The top of the screw rod 12 is rotationally connected to the upper inner wall of the corresponding intermediate frame 4. First through grooves 11 are opened on the left and right side surfaces of the intermediate frame 4. A lifting plate 7 movably passes through the first through grooves 11. A threaded groove for the screw rod 12 to pass through is opened at the middle of the lifting plate 7. At the two ends of the lifting plate 7 passing through the intermediate frame 4, curved rods 8 are rotationally connected. One ends of the two curved rods 8 are respectively rotationally connected to the first folding plate 2 and the second folding plate 3. At the front and rear sides of the first folding plate 2 and the second folding plate 3 close to one side of the intermediate plate 1, rotating parts 9 are fixedly connected. The rotating parts 9 are rotationally installed on the intermediate plate 1;

[0041] The retracting and releasing structure includes an inner frame 13 installed at the position close to the top at the inner side surfaces of the two intermediate frames 4. A cross bar 14 is connected between the inner walls at the two ends of the inner frame 13. At the positions close to the two ends on the cross bar 14, vertical plates 15 are movably sleeved. The rear side surface of the vertical plate 15 is attached to the inner wall of the inner frame 13. At the positions close to the top at the mutually remote side surfaces of each group of two vertical plates 15, cross bars 16 are connected. The two ends of the lower pressing roller 6 are respectively rotationally connected to the corresponding cross bars 16. A first guiding groove 17 is opened on each vertical plate 15. The first guiding groove 17 is in an "S" shape. At the two ends of the side surface of the lifting plate 7 close to the vertical plate 15, inserting rods 18 are connected. One ends of the inserting rods 18 movably insert into the corresponding first guiding grooves 17. When storing or transporting the device, the first motor 10 on the intermediate plate 1 can be started to drive the screw rod 12 to rotate. The lifting plate 7 moves upward on the rotating screw rod 12. The first folding plate 2 and the second folding plate 3 are pulled from both sides of the intermediate plate 1 through the curved rods 8, so that the first folding plate 2 and the second folding plate 3 are turned up to both sides of the intermediate plate 1 for these. And during the upward movement of the lifting plate 7, one ends of the inserting rods 18 are driven to slide upward in the first guiding grooves 17 of the vertical plates 15. Through the extrusion of the inserting rods 18 on the groove walls of the first guiding grooves 17, the vertical plates 15 are pushed to move towards the middle, so as to drive the two lower pressing rollers 6 to automatically close towards the middle, so as to reduce the occupied space of the device and facilitate storage or transportation.

[0042] See Figure 1 、 Figure 3 、 Figure 4and Figure 5 , the guiding structure includes a right side plate 19 connected to the front and rear edges of the upper right side of the first folding plate 2. Two guiding rollers 20 are arranged between the two right side plates 19. The two ends of a lower guiding roller 20 are respectively rotatably connected to the two right side plates 19. A second through groove 24 is opened at a position 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 groove 24. A lifting block 23 is movably sleeved on the first vertical rod 22. The two ends of an upper guiding roller 20 are respectively rotatably connected to the two lifting blocks 23. A first spring 21 is sleeved on each first vertical rod 22. 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 groove 24. A flattening structure is arranged in the middle of the upper surface of the first folding plate 2. The film is passed through the two guiding rollers 20, and under the elastic force of the first spring 21, the upper guiding roller 20 is pushed, and the film is clamped on the lower guiding roller 20. Thus, during the process of pulling the film, it plays a guiding role for the film;

[0043] The flattening structure includes two fixing plates 25 connected to the front and rear edges near the middle of the upper surface of the first folding plate 2. Two third through grooves 28 are respectively opened at the left and right sides of the side surface where the two fixing plates 25 are close to each other. Two pressing plates 26 are respectively slidably arranged in the two third through grooves 28 at the same height position. The end faces of both ends of each pressing plate 26 are inclined surfaces inclined towards the middle. A plurality of flattening rollers 27 are respectively rotatably installed between the two front and rear pressing plates 26 in each group. A second vertical rod 29 is connected between the upper and lower groove walls of each third through groove 28. The second vertical rod 29 passes through a through hole opened on the pressing plate 26 movably. A second spring 30 is sleeved on each second vertical rod 29. 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 groove 28. A film-passing structure is arranged in the middle of the two fixing plates 25;

[0044] The film-passing structure includes a transverse groove 34 opened on the two fixing plates 25. The transverse groove 34 is located at a position between the upper and lower groups of flattening rollers 27. Two traction blocks 33 are respectively slidably arranged in the two transverse grooves 34. An extrusion block 35 is installed on the side surface where the two traction blocks 33 are close to each other. The corners of the extrusion block 35 are all inclined surfaces. A fourth through groove 36 is opened on both the extrusion block 35 and the traction block 33. A traction strip 32 is fixedly installed on the lower groove wall of the fourth through groove 36. A clamping structure is arranged on the traction strip 32. Gripping frames 31 are installed on both ends of the traction strip 32 passing through the traction block 33;

[0045] The clamping structure includes a clamping plate 37 that is movably inserted into the fourth through groove 36 on two traction blocks 33. At both ends of the clamping plate 37 inserted into the holding frame 31, there are connecting handles 38. On the inner walls of the upper and lower sides of each holding frame 31, away from the fixing plate 25, there is a third vertical rod 39 connected. The third vertical rod 39 movably passes through the handle 38, and 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 handle 38 and the upper inner wall of the holding frame 31. Lift the handle 38 in the holding frame 31, lift the clamping plate 37 from the traction strip 32, drive the third spring 40 to compress. Place one end of the film on the traction strip 32, release the handle 38. Under the elastic force of the third spring 40, push the clamping plate 37 to clamp one end of the film on the traction strip 32. Then, use the holding frame 31 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, drive the extrusion block 35 to extrude the extrusion plate 26, thereby pushing the upper and lower groups of flattening rollers 27 to move in the direction away from each other, squeezing the second spring 30 to compress. When the extrusion block 35 moves out from one end of the extrusion plate 26, use the elastic force of the second spring 30 to push the two groups of flattening rollers 27 to reset to clamp the film. During the process of pulling the film, perform the flattening work on the film to improve the quality of the pulling work.

[0046] See 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 front left side edge. A traction roller 42 is rotatably installed between the two left side plates 41. At the top of the front left side plate 41, a second motor 43 is installed. One end of the output shaft of the second motor 43 is connected to the traction roller 42. A cutting structure is arranged at a position near the right side on the second folding plate 3. After winding one end of the film around the traction roller 42, the second motor 43 can be started to drive the traction roller 42 to rotate to perform the traction work on the film;

[0047] The cutting structure includes a cutting table 44 installed at a position near the right side on the second folding plate 3. Intermediate strips 45 movably pass through the front and rear edges in the middle of the cutting table 44. A top strip 46 is connected between the tops of the two intermediate strips 45. A cutting knife 47 is installed in the middle of the lower surface of the top strip 46. Driven plates 48 are connected to the bottom ends of the two intermediate strips 45. A second guiding groove 49 is formed on the driven plate 48. The second guiding groove 49 is in an "S" shape. The cutting table 44 is provided with a clamping and limiting structure;

[0048] The clamping and limiting structure includes two right-side bars 52 that movably pass through the front and rear edges on the right side above the cutting table 44. A clamping roller 53 is rotatably installed between the tops of the two right-side bars 52. Two left-side bars 54 movably pass through the front and rear edges on the left side above the cutting table 44. A fastening roller 55 is rotatably installed between the tops of the two left-side bars 54. Fifth through slots 56 are provided at the positions of the left-side bars 54 and the right-side bars 52 on the left and right side surfaces of the cutting table 44. A first driving bar 57 that passes through the corresponding fifth through slot 56 is connected to the bottom end on the left side of each right-side bar 52. A second driving bar 59 that passes through the corresponding fifth through slot 56 is connected to the bottom end on the right side of each left-side bar 54. A third guiding slot 58 is provided on the first driving bar 57. The right end of the third guiding slot 58 is in a "Z" shape. A fourth guiding slot 60 is provided on the second driving bar 59. The left side of the fourth guiding slot 60 is in a "Z" shape. An electric telescopic rod 51 is installed at a position near the lower part of the right side surface of the cutting table 44. A through rod 50 is installed at one end of the output shaft of the electric telescopic rod 51 that penetrates into the cutting table 44. The through rod 50 movably passes through the second guiding slot 49, the third guiding slot 58, and the fourth guiding slot 60 respectively. When cutting the film is needed, start the electric telescopic rod 51 to drive the end of the through rod 50 to slide in the second guiding slot 49 of the driving plate 48. Through the downward extrusion of the through rod 50 on the wall of the second guiding slot 49, drive the cutting knife 47 on the top bar 46 at the top of the middle bar 45 to move downward. At the same time, the through rod 50 first slides on the inclined wall of the third guiding slot 58 on the first driving bar 57, and pulls the clamping roller 53 to move downward through the right-side bar 52, pressing the film on one side of the cutting knife 47 to prevent the film from directly falling on 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 wall of the fourth guiding slot 60 on the second driving bar 59, pulling the fastening roller 55 at the top of the left-side bar 54 to move downward, 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.

[0049] The embodiment of the present invention also discloses a traction method for PVC film processing, including the following steps:

[0050] 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;

[0051] Step 2: Pass one end of the film to be traction through the guiding structure, clamp one end of the film through the clamping structure, drive the film to pass through between the flattening structures by the film-passing structure, and then loosen the clamping structure;

[0052] Step 3: Pass the film around the lower side of the lower pressing roller 6 and then around the upper side of the top roller 5 to increase the tension of the film during traction;

[0053] Step 4: Pass the film under the clamping roller 53 and the fastening roller 55 of the clamping and limiting structure;

[0054] Step 5: Finally, wind one end of the film onto the traction structure for traction work.

[0055] The implementation principle of a traction device and its method for PVC film processing in an embodiment of the present invention is as follows: When traction of the film is carried out, first, the grip 38 is lifted in the grip frame 31, the clamping plate 37 is lifted from the traction strip 32, driving the third spring 40 to be compressed. One end of the film is placed on the traction strip 32, and then 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 strip 32. Then, the grip frame 31 is used 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 extrude the extrusion plate 26, thereby pushing the upper and lower groups of flattening rollers 27 to move in a direction 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 reset to clamp the film. Then, one end of the film is respectively passed around below the lower pressing roller 6 and above the top roller 5 to increase the tension during the film traction process. Next, the film is passed through below the clamping roller 53 and the fastening roller 55. Finally, one end of the film is wound around the traction roller 42, and the second motor 43 is started to drive the traction roller 42 to rotate to achieve the traction work of the film. When the film needs to be cut, the electric telescopic rod 51 is started to drive the end of the through rod 50 to slide in the second guiding groove 49 of the driving plate 48. Through the downward extrusion of the through rod 50 on the groove wall of the second guiding groove 49, the cutting knife 47 on the top bar 46 at the top of the middle bar 45 is driven to move downward. At the same time, the through rod 50 first slides on the inclined groove wall of the third guiding groove 58 on the first driving bar 57, pulling the clamping roller 53 to move downward through the right side bar 52 to press the film tightly on one side of the cutting knife 47 to prevent the film from directly falling on 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 guiding groove 60 on the second driving bar 59, pulling the fastening roller 55 at the top of the left side bar 54 to move downward to press the film tightly 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 through rod 50 to move in the reverse direction. During the reverse movement of the through rod 50, the cutting knife 47 is driven to move upward, and the fastening roller 55 is loosened during the upward movement. At this time, the clamping roller 53 is still in a state of tightly pressing 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, an operator manually holds the clamping roller 53 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. One end of the film is wound around the traction roller 42 again to continue the traction work. When the device needs to be stored or transported, the first motor 10 is started to drive the screw rod 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 through the curved rod 8 to fold the device, reducing the occupied space of the device and facilitating storage or transportation.When the first folding plate 2 and the second folding plate 3 are turned up, the first folding plate 2 drives the two right side plates 19 to rotate integrally above the top roller 5. The fixing plate 25 on the first folding plate 2 rotates integrally between the middle frames 4 and is located below the lower pressing 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 pressing roller 6. The cutting table 44 rotates integrally between the middle frames 4 and is located below the lower pressing roller 6, avoiding the problem of mutual interference of the components on the first folding plate 2 and the second folding plate 3 during the folding process. The structure is simple and the function is practical.

[0056] The above are all the preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A pulling device for PVC film processing, comprising an intermediate plate, characterized in that: 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 a first motor just below each middle frame, the top end of the first motor output shaft is connected to a screw, the top end of the screw is rotatably connected to the upper inner wall of the corresponding middle frame, 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, a threaded slot for the screw to pass through is provided in the middle of the lifting plate, both ends of the lifting plate passing through the middle frame are rotatably connected to a bent rod, one end of the two bent rods is rotatably connected to the first folding plate and the second folding plate respectively, the first folding plate and the second folding plate are fixedly connected to the front and rear sides of the middle plate, and the rotating member is rotatably installed on the middle plate; 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, 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, the first guide groove is in the shape of an "S", and an insertion rod is 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.

2. A traction device for PVC film processing according to claim 1, characterized in that: 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, the two ends of the lower guide roller are respectively 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, the two ends of the upper guide roller are respectively rotatably connected to the two lifting blocks, each of the first vertical rods is sleeved with a first spring, the 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.

3. A traction device for PVC film processing according to claim 2, characterized in that: 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 one side of the two fixed plates close to each other, 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.

4. The traction device for PVC film processing according to claim 3, characterized in that: The membrane-penetrating structure includes a transverse groove opened 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, the extrusion blocks and the traction blocks are each provided with a fourth through groove, a traction strip is fixedly installed on the lower groove wall of the fourth through groove, a clamping structure is arranged on the traction strip, and grip frames are installed on both ends of the traction strip passing through the traction block.

5. The traction device for PVC film processing according to claim 4, characterized in that: The clamping structure includes a clamping plate that is movably inserted into the fourth through grooves on the two traction blocks, and both ends of the clamping plate inserted into the grip frame are connected to handles. A third vertical rod is connected to the side of the upper and lower inner walls 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.

6. The traction device for PVC film processing according to claim 1, characterized in that: The traction structure includes two left-side plates installed on the second folding plate near the left front edge, a traction roller is rotatably installed between the two left-side plates, a second motor is installed at the top of the front side of the left-side plate, 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.

7. A traction device for PVC film processing according to claim 6, characterized in that: 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, 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. The cutting table is provided with a clamping and limiting structure.

8. The traction device for PVC film processing according to claim 7, characterized in that: 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 are movably passed through the front and rear edges of the left side of the cutting table, and a fastening roller is rotatably installed between the top ends of the two left side bars, and the left and right sides of the cutting table are provided with fifth through grooves at the positions of the left and right bars, and the bottom end of the left side of each of the right side bars is connected to a first driving bar that passes through the corresponding fifth through groove, and the bottom end of the right side of each of the left side bars is connected to a second driving bar that passes through the corresponding fifth through groove, a third guide groove is opened on the first driving bar, and the right end of the third guide groove is in a "Z" shape, a fourth guide groove is opened on the second driving bar, and the left side of the fourth guide groove is in a "Z" shape, and 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 groove, the third guide groove and the fourth guide groove respectively.

9. A pulling method for PVC film processing, characterized in that: The traction method for PVC film processing uses a traction device for PVC film processing as described in any one of claims 1 to 8, comprising 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.

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