A PVC-PE film composite process

Abstract

The present application discloses a PVC-PE film composite process, which relates to the technical field of composite films, and includes the following steps: S1: Gluing: The PVC substrate is coated with glue through a glue coating mechanism, and the glue coating mechanism includes a glue pool, a coating roller, a pressure roller and a first driving member, and a scraper plate is provided in the glue pool, and a glue discharge mechanism is provided in the scraper plate; S2: Drying: The PVC substrate after gluing enters a drying tunnel for drying; S3: Lamination: The dried PVC substrate and the PE substrate are laminated through a lamination mechanism; S4: Reeling: The reeling mechanism reels the laminated PVC-PE composite film. The present application utilizes a glue discharge mechanism, and the scraper plate scrapes off the excess glue on the coating roller, and the excess glue is stored in the glue storage area. The glue discharge mechanism transports the glue in the glue storage area from the glue inlet to the glue discharge groove, and then discharges the glue in the glue discharge groove from the glue discharge port, thereby reducing the situation where the glue adheres to the scraper plate.

Description

Technical Field

[0001] The present application relates to the technical field of composite films, and in particular to a PVC-PE film composite process. Background Art

[0002] PVC-PE composite film is a multi-layer film composed of polyvinyl chloride (PVC) and polyethylene (PE). It has the hardness and transparency of PVC and the flexibility and stretchability of PE. It is widely used in packaging, building materials, insulation layers and other fields.

[0003] At present, most PVC-PE composite films are made by dry composite process. A layer of glue is coated on the PVC substrate by using a glue coating mechanism. The PVC substrate passes through a drying tunnel to remove the solvent in the glue and dry the glue. After the PVC substrate is transported out of the drying tunnel, it is bonded with the PE substrate under hot pressing to form a PVC-PE composite film. The glue coating mechanism consists of a glue pool and a coating roller. The coating roller is rotatably mounted on the glue pool. The lower half of the coating roller is immersed in the glue pool. During the rotation of the coating roller, the texture on the coating roller can adsorb the glue on the coating roller, and the coating roller then coats the glue on the PVC substrate. A scraper is installed above the coating roller. The scraper scrapes off the excess glue on the coating roller, making the thickness of the glue layer more uniform, thereby improving the composite effect of the film.

[0004] After the scraper is used for a long time, the glue liquid is easy to adhere to the scraper, which affects the scraping effect of the scraper, making the thickness of the glue layer on the coating roller uneven, thus affecting the composite effect of the film. Summary of the invention

[0005] In order to reduce the situation where glue adheres to the scraper plate, the present application provides a PVC-PE film composite process.

[0006] A PVC-PE film composite process provided in this application adopts the following technical solution:

[0007] A PVC-PE film composite process comprises the following steps: S1: Gluing: PVC substrate is coated with glue by a glue coating mechanism; S2: Drying: The PVC substrate after glue coating enters a drying tunnel for drying; S3: Lamination: The dried PVC substrate and PE substrate are laminated by a lamination mechanism; S4: Reeling: The reeling mechanism reels the laminated PVC-PE composite film; in step S1: The glue coating mechanism comprises a glue pool, a coating roller, a pressure roller and a first driving member, the coating roller is rotatably arranged in the glue pool, the first driving member is arranged on the outer side wall of the glue pool and is used to drive the coating roller to rotate, the lower half of the coating roller is immersed in the glue liquid, the pressure roller is rotatably arranged in the glue pool, the The bottom of the pressure roller abuts against the top of the coating roller, and the PVC film moves between the pressure roller and the coating roller. A scraper plate is arranged in the glue pool, and the top of the scraper plate is inclined toward the coating roller. A scraper gap is formed between the top of the scraper plate and the outer surface of the coating roller, and a glue storage area is formed between the scraper plate and the coating roller and below the scraper gap. A glue discharge groove is provided in the scraper plate, and a glue inlet connecting the glue storage area and the glue discharge groove is provided at the top of the scraper plate, and a glue discharge port connected to the glue discharge groove is provided at the bottom of the scraper plate. A glue discharge mechanism is arranged in the scraper plate, and the glue discharge mechanism transports the glue in the glue storage area from the glue inlet to the glue discharge groove, and then discharges the glue in the glue discharge groove from the glue discharge port.

[0008] By adopting the above technical scheme, the first driving member drives the coating roller to rotate. During the rotation of the coating roller, the glue in the glue pool adheres to the coating roller. When the PVC film passes between the pressure roller and the coating roller, the coating roller applies the glue on the PVC film. During the process of the coating roller driving the glue to move, the scraper scrapes off the excess glue on the coating roller. After the glue passes through the glue discharge gap, the thickness of the glue layer is more uniform. The excess glue scraped off by the scraper is stored in the glue storage area. The glue discharge mechanism transports the glue in the glue storage area from the glue inlet to the glue discharge groove, and then discharges the glue in the glue discharge groove from the glue discharge port, thereby reducing the situation where the glue adheres to the scraper.

[0009] Preferably, the glue discharge mechanism includes a second driving member, a glue feed roller, a conveyor belt and a plurality of conveyor plates, the glue feed roller is rotatably arranged at the glue feed port of the scraper plate, the conveyor belt is rotatably arranged in the glue discharge groove of the scraper plate, the head and tail ends of the conveyor belt are respectively located near the glue feed port and the glue discharge port, a plurality of conveyor plates are fixedly arranged on the conveyor belt at intervals, and the second driving member is arranged on the side wall of the scraper plate and is used to drive the glue feed roller and the conveyor belt to rotate.

[0010] By adopting the above technical solution, the second driving member drives the glue feed roller to rotate in the glue feed port. During the rotation of the glue feed roller, the glue in the glue storage area can be transported to the top of the glue discharge groove. The second driving member drives the conveyor belt to rotate, and the conveyor belt drives the conveyor plate to rotate and transports the glue at the top of the glue discharge groove to the bottom of the glue discharge groove. The glue enters the glue discharge port from the bottom of the glue discharge groove, and then is discharged from the glue discharge port to the scraper plate and drips into the glue pool.

[0011] Preferably, a plurality of glue feeding plates are arranged at equal intervals along the circumference of the glue feeding roller, and the glue feeding plates are slidably arranged in the glue feeding roller along the diameter direction of the glue feeding roller, and one side of the glue feeding plate extends to the outside of the glue feeding roller, and the glue scraper plate is located at the glue inlet and has movable annular grooves on two opposite inner side walls, and movable blocks are fixedly arranged at both ends of the glue feeding plate, and two movable blocks are respectively slidably arranged in two movable annular grooves, and the glue scraper plate is located at the top end of the glue discharge groove to form a scraping strip, and the scraping strip abuts against the outer side wall of the glue feeding roller, and the side of the movable annular groove close to the scraping strip is recessed inwardly to form an inner concave portion, and when the movable block moves to the inner concave portion of the movable annular groove, the glue feeding plate moves inwardly into the glue feeding roller.

[0012] By adopting the above technical scheme, the glue feed roller drives the glue feed plate to rotate during its rotation. During the rotation of the glue feed plate, the glue liquid in the glue storage area can be pushed from the glue feed port into the top of the glue discharge groove, thereby improving the glue feeding efficiency of the glue feed roller. When the glue feed roller drives the glue feed plate to move to the scraper bar, the moving block moves to the inner concave part of the moving ring groove and drives the glue feed plate to move into the glue feed roller. At this time, the scraper bar scrapes the glue liquid on the surface of the glue feed roller, thereby further improving the glue feeding efficiency of the glue feed roller.

[0013] Preferably, a side of the movable annular groove close to the glue storage area protrudes outward to form an outer convex portion, and when the movable block moves to the outer convex portion of the movable annular groove, the glue feeding plate moves outward and extends.

[0014] By adopting the above technical solution, when the glue feed roller drives the glue feed plate to move into the glue storage area, the moving block moves to the outer convex part of the moving ring groove and drives the glue feed plate to move outward and extend. The extended glue feed plate facilitates pushing the glue in the glue storage area into the glue feed port, thereby further improving the glue feeding efficiency of the glue feed roller.

[0015] Preferably, the coating roller rotates in opposite directions to the glue feed roller, the glue feed roller rotates in opposite directions to the conveyor belt, and the glue scraper is located at the bottom of the glue discharge groove and is provided with a plurality of glue discharge holes spaced apart from each other.

[0016] By adopting the above technical solution, when the conveyor belt drives the conveyor plate to move, the conveyor plate drives the glue liquid at the top of the glue discharge groove to move toward the bottom of the glue discharge groove. During the movement of the glue liquid, it passes through multiple glue discharge holes in sequence. The glue discharge holes can pre-drain the glue liquid in the glue discharge groove, so that the glue liquid in the glue discharge groove can be discharged from the scraper plate.

[0017] Preferably, a plurality of heating strips are arranged in the scraper plate, and the plurality of heating strips are interspersed between the plurality of glue discharge holes.

[0018] By adopting the above technical solution, the heating strip heats the scraper plate, thereby improving the fluidity of the glue in the glue discharge groove, which on the one hand improves the glue discharge efficiency and on the other hand reduces the situation where the glue is blocked in the glue discharge hole.

[0019] Preferably, the glue removal mechanism includes a second driving member, a glue removal tape, a scraper, a first roller, a second roller, a third roller and a fourth roller. The first roller is rotatably arranged at the glue inlet of the scraper, the second roller is rotatably arranged at the top of the glue removal groove of the scraper, and the third roller is rotatably arranged at the bottom of the glue removal groove of the scraper. The glue removal tape is sleeved on the first roller, the second roller and the third roller. The second driving member is arranged on the side wall of the scraper and is used to drive the third roller to rotate. The scraper is arranged above the glue removal port in the scraper, and the scraper abuts against the glue removal tape. The fourth roller is rotatably arranged in the glue removal groove of the scraper on one side close to the glue removal port, and the top of the outer surface of the fourth roller abuts against the outer wall of the glue removal tape.

[0020] By adopting the above technical scheme, the second driving member drives the third roller to rotate, and the third roller drives the rubber discharge belt to rotate. The rubber discharge belt rotates on the first roller, the second roller and the third roller. When the rubber discharge belt rotates to the first roller, the glue in the glue storage area adheres to the rubber discharge belt. During the rotation of the rubber discharge belt, the glue in the glue storage area is transported from the glue inlet to the rubber discharge groove. When the rubber discharge belt drives the glue to move to the third roller, the scraper scrapes off the glue on the rubber discharge belt, and the glue is discharged from the rubber discharge port to the scraper and drips into the glue pool.

[0021] Preferably, a first slider is slidably installed in the scraper plate along the thickness direction thereof, two first sliders are installed, two ends of the first roller body are rotatably installed in the two first sliders respectively, two adjusting members are provided in the scraper plate, the adjusting members are used to drive the first slider to move up and down in the scraper plate, a second slider is slidably installed in the scraper plate along the thickness direction thereof, two second sliders are installed, two ends of the fourth roller body are rotatably installed in the two second sliders respectively, two elastic members are provided in the scraper plate, and the top ends of the two elastic members respectively abut the bottom ends of the two second sliders.

[0022] By adopting the above technical scheme, two first sliders are driven to move up and down in the scraper plate by two adjusting parts, and the two first sliders drive the first roller to move up and down at the glue inlet of the scraper plate, so that the size of the glue inlet of the glue inlet can be adjusted, and then the glue inlet amount of the discharge tape can be adjusted. When the first roller moves, the elastic part pushes the fourth roller to move against the discharge tape through the second slider, so that the discharge tape can be tensioned.

[0023] Preferably, floating rollers are placed on both sides of the coating roller in the glue pool, and spiral grooves are formed on the outer surfaces of the floating rollers. Connecting mechanisms are provided at both ends of the two floating rollers, and the connecting mechanisms include a connecting telescopic rod, an elastic telescopic rod, a synchronous belt and three synchronous wheels. The elastic telescopic rod is fixedly arranged in the middle of the outer surface of the connecting telescopic rod in the vertical direction, and the three synchronous wheels are rotatably arranged at the two ends of the connecting telescopic rod and the top of the elastic telescopic rod, respectively. The synchronous belt is sleeved on the three synchronous wheels, and the ends of the two floating rollers respectively pass through the two ends of the connecting telescopic rod and are fixedly connected to the two synchronous wheels.

[0024] By adopting the above technical solution, the elastic telescopic rod drives the synchronous wheel to move upward to tighten the synchronous belt. The tensioned synchronous belt drives the connected telescopic rod to contract, so that the two floating rollers fit the coating roller. When the coating roller rotates, the coating roller drives the two floating rollers to rotate synchronously, and the floating roller drives the spiral groove to rotate, so that the bubbles in the glue liquid can be guided to the end of the floating roller, making it difficult for the bubbles to enter the coating roller with the glue liquid.

[0025] In summary, the present application includes at least one of the following beneficial technical effects:

[0026] 1. Using the glue discharge mechanism, the first driving member drives the coating roller to rotate. During the rotation of the coating roller, the glue in the glue pool adheres to the coating roller. When the PVC film passes between the pressure roller and the coating roller, the coating roller applies the glue on the PVC film. During the process of the coating roller driving the glue to move, the scraper scrapes off the excess glue on the coating roller. After the glue passes through the glue discharge gap, the thickness of the glue layer is more uniform. The excess glue scraped off by the scraper is stored in the glue storage area. The glue discharge mechanism transports the glue in the glue storage area from the glue inlet to the glue discharge groove, and then discharges the glue in the glue discharge groove from the glue discharge port, thereby reducing the glue adhering to the scraper;

[0027] 2. With the help of the glue feeding plate, the glue feeding roller drives the glue feeding plate to rotate during its rotation. During the rotation of the glue feeding plate, the glue liquid in the glue storage area can be pushed from the glue feeding port into the top of the glue discharge groove, thereby improving the glue feeding efficiency of the glue feeding roller.

[0028] 3. When the conveyor belt drives the conveyor plate to move through the glue discharge holes, the conveyor plate drives the glue liquid at the top of the glue discharge groove to move toward the bottom of the glue discharge groove. During the movement of the glue liquid, it passes through multiple glue discharge holes in sequence. The glue discharge holes can pre-drain the glue liquid in the glue discharge groove, so that the glue liquid in the glue discharge groove can be discharged from the scraper plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a flow chart of the PVC-PE film composite process in Example 1 of the present application;

[0030] Figure 2This is a schematic diagram of the overall structure of the PVC-PE film composite process in Example 1 of the present application;

[0031] Figure 3 This is a schematic diagram of a part of the structure of the PVC-PE film composite process in Example 1 of the present application to highlight the gluing mechanism;

[0032] Figure 4 This is a partial structural cross-sectional view of the PVC-PE film composite process in Example 1 of the present application to highlight the connection mechanism;

[0033] Figure 5 This application Figure 4 The enlarged schematic diagram at A in the middle;

[0034] Figure 6 This is a partial structural cross-sectional view of the PVC-PE film composite process in Example 1 of the present application to highlight the debonding mechanism;

[0035] Figure 7 This application Figure 6 The enlarged schematic diagram of point B in the middle;

[0036] Figure 8 This is an exploded cross-sectional view of a part of the structure of the PVC-PE film composite process in Example 1 of the present application to highlight the movable ring groove;

[0037] Fig. 9 This is a schematic diagram of a part of the structure of the squeegee plate for highlighting the PVC-PE film composite process in Example 2 of the present application;

[0038] Fig.10 This is an exploded cross-sectional view of a part of the structure of the PVC-PE film composite process in Example 2 of the present application to highlight the debonding mechanism;

[0039] Fig.11 This application Fig.10 Enlarged schematic diagram at point C in the middle.

[0040] Figure numerals: 1, drying tunnel; 2, pressing mechanism; 3, winding mechanism; 5, gluing mechanism; 51, glue pool; 52, coating roller; 53, pressing roller; 54, first driving member; 6, glue scraper; 7, glue discharge mechanism; 701, second driving member; 702, glue feed roller; 703, conveyor belt; 704, conveyor plate; 711, glue discharge belt; 712, scraper; 713, first roller body; 714, second roller body; 715, third roller body; 716, fourth roller body; 8, glue scraping gap; 9, glue storage area; 10, glue discharge groove; 11, glue feed port; 12, glue discharge port; 13, glue feed plate ; 14. Moving ring groove; 141. Inner concave portion; 142. Outer convex portion; 15. Moving block; 16. Scraper strip; 17. Glue discharge hole; 18. Heating strip; 19. First slider; 20. Adjusting member; 21. Second slider; 22. Elastic member; 23. Floating roller; 24. Spiral groove; 25. Connecting mechanism; 251. Connecting telescopic rod; 252. Elastic telescopic rod; 253. Synchronous belt; 254. Synchronous wheel; 26. First unwinding mechanism; 27. Second unwinding mechanism; 28. Rotating roller; 29. ​​Transmission gear; 30. Retaining ring; 31. Third driving member; 32. Driving gear. DETAILED DESCRIPTION

[0041] The following is combined with Figure 1-Figure 11 This application is described in further detail.

[0042] The embodiment of the present application discloses a PVC-PE film composite process.

[0043] Reference Figure 1 and Figure 2 , a PVC-PE film composite process comprises the following steps:

[0044] S1: Gluing: The first unwinding mechanism 26 delivers the PVC substrate, and the PVC substrate is coated with glue by the gluing mechanism 5;

[0045] S2: Drying: The glue-coated PVC substrate passes through a conveyor roller and enters a drying tunnel 1, where the glue on the PVC substrate is dried;

[0046] S3: Lamination: The second unwinding mechanism 27 delivers the PE substrate, and the dried PVC substrate and the PE substrate are laminated through the lamination mechanism 2;

[0047] S4: Rewinding: The rewinding mechanism 3 rewinds the laminated PVC-PE composite film.

[0048] Reference Figure 3 and Figure 4The glue coating mechanism 5 includes a glue pool 51, a coating roller 52, a pressure roller 53 and a first driving member 54. The glue pool 51 contains glue liquid. The coating roller 52 and the pressure roller 53 are both rotatably mounted in the glue pool 51. The bottom of the coating roller 52 is immersed in the glue liquid. The top of the coating roller 52 contacts the bottom wall of the pressure roller 53, and the PVC substrate moves through the coating roller 52 and the pressure roller 53. The first driving member 54 is fixedly mounted on the outer side wall of the glue pool 51. The driving end of the first driving member 54 is fixedly connected to the coating roller 52. In the present application, the first driving member 54 can be selected as a servo motor. The first driving member 54 drives the coating roller 52 to rotate. During the rotation of the coating roller 52, the glue in the glue pool 51 adheres to the coating roller 52. When the PVC film passes between the pressure roller 53 and the coating roller 52, the coating roller 52 coats the glue liquid on the PVC film.

[0049] Reference Figure 4 and Figure 5 A scraper plate 6 is rotatably installed in the glue pool 51, and a third driving member 31 is installed on the outer wall of the glue pool 51. The driving end of the third driving member 31 is fixedly connected to the scraper plate 6. In the present application, the third driving member 31 can be selected as a servo motor, and the driving member can drive the scraper plate 6 to rotate. The top of the scraper plate 6 is inclined toward the coating roller 52, and there is a scraper gap 8 between the bottom of the top of the scraper plate 6 and the outer wall of the coating roller 52. A glue storage area 9 is formed between the scraper plate 6 and the coating roller 52 and below the scraper gap 8. When the coating roller 52 drives the glue to move through the scraper gap 8, the scraper plate 6 scrapes off the excess glue on the coating roller 52, so that the thickness of the glue layer is more uniform, thereby improving the composite effect of the film, and the excess glue is stored in the glue storage area 9.

[0050] Reference Figure 6 The scraper 6 has a glue discharge groove 10 along its length direction, and a glue inlet 11 and a glue discharge port 12 are provided on the bottom wall of the scraper 6. The glue inlet 11 is connected to the top of the glue discharge groove 10 and the glue storage area 9, and the glue discharge port 12 is connected to the bottom of the glue discharge groove 10. A glue discharge mechanism 7 is installed in the scraper 6, and the glue discharge mechanism 7 can transport the glue in the glue storage area 9 from the glue inlet 11 to the glue discharge groove 10, and then discharge the glue in the glue discharge groove 10 from the glue discharge port 12, thereby reducing the glue liquid adhering to the scraper 6.

[0051] Reference Figure 6 , Figure 7 and Figure 8The glue discharge mechanism 7 includes a second driving member 701, a glue feed roller 702, a conveyor belt 703 and a plurality of conveyor plates 704. The glue feed roller 702 is rotatably mounted in the glue scraper 6, and the glue feed roller 702 is located at the glue feed port 11 of the glue scraper 6. The second driving member 701 is fixedly mounted on the outer wall of the glue scraper 6, and the driving end of the second driving member 701 is fixedly connected to the glue feed roller 702. In the present application, the second driving member 701 can be selected as a servo motor. The second driving member 701 drives the glue feed roller 702 to rotate, and the rotation direction of the glue feed roller 702 is opposite to the rotation direction of the coating roller 52.

[0052] A plurality of glue feeding plates 13 are installed at equal intervals along the circumference of the glue feeding roller 702, and each glue feeding plate 13 is slidably installed in the glue feeding roller 702 along the diameter direction of the glue feeding roller 702. The scraper plate 6 is provided with movable annular grooves 14 on the two opposite inner side walls of the glue feeding port 11, and movable blocks 15 are fixedly installed at the opposite ends of each glue feeding plate 13 close to the inner side of the glue feeding roller 702, and the two movable blocks 15 are slidably installed in the two movable annular grooves 14.

[0053] A scraper bar 16 is formed in the scraper plate 6 below the top of the glue discharge groove 10. The scraper bar 16 is located on a side close to the glue inlet 11 and abuts against the outer wall of the glue feeding roller 702. The movable annular groove 14 is located on a side close to the scraper bar 16 and is recessed inward to form an inner concave portion 141. The movable annular groove 14 is located on a side close to the glue storage area 9 and is protruded outward to form an outer convex portion 142.

[0054] The glue feeding roller 702 drives the glue feeding plate 13 to rotate during rotation. During the rotation of the glue feeding plate 13, the glue liquid in the glue storage area 9 can be pushed from the glue inlet 11 into the top of the glue discharge groove 10. During the movement of the glue feeding plate 13, the moving block 15 is driven to slide in the moving annular groove 14. When the glue feeding plate 13 moves close to the scraper bar 16, the moving block 15 moves to the inner concave portion 141 of the moving annular groove 14 and drives the glue feeding plate 13 to move into the glue feeding roller 702. The scraper bar 16 scrapes the glue liquid on the surface of the glue feeding roller 702, so that the glue liquid remains at the top of the glue discharge groove 10. When the glue feeding roller 702 drives the glue feeding plate 13 to move into the glue storage area 9, the moving block 15 moves to the outer convex portion 142 of the moving annular groove 14 and drives the glue feeding plate 13 to move outward and extend. The extended glue feeding plate 13 facilitates pushing the glue liquid in the glue storage area 9 into the glue inlet 11, thereby improving the glue feeding efficiency of the glue feeding roller 702.

[0055] The scraper plate 6 is located at the top and bottom of the glue discharge groove 10, and the rotating rollers 28 are rotatably installed. The conveyor belt 703 is sleeved on the two rotating rollers 28, and a plurality of conveyor plates 704 are fixedly installed on the outer surface of the conveyor belt 703 at equal intervals. The rotating shaft of the rotating roller 28 located at the top of the glue discharge groove 10 and the rotating shaft of the glue feed roller 702 are fixedly installed with a driving gear 32, and the two driving gears 32 are meshed with each other. The glue feed roller 702 drives the conveyor belt 703 to rotate through the driving gear 32, and the conveyor belt 703 rotates in the opposite direction to the glue feed roller 702. The conveyor belt 703 drives the conveyor plate 704 to move, and the conveyor plate 704 conveys the glue liquid at the top of the glue discharge groove 10 to the bottom of the glue discharge groove 10, so that the glue liquid can be discharged from the glue discharge port 12 at the bottom of the glue discharge groove 10.

[0056] A plurality of discharge holes 17 are provided at intervals on the bottom wall of the scraper 6, and the tops of the discharge holes 17 are connected to the discharge groove 10. When the conveying plate 704 drives the glue liquid to move from the top to the bottom of the discharge groove 10, the glue liquid can be discharged from the discharge groove 10 through the discharge holes 17, thereby facilitating the discharge of the glue liquid in the discharge groove 10 from the scraper 6.

[0057] A plurality of heating strips 18 are embedded in the bottom wall of the scraper 6, and the plurality of heating strips 18 are interspersed between the plurality of glue discharge holes 17. The heating strips 18 heat the scraper 6, thereby improving the fluidity of the glue in the glue discharge groove 10, improving the glue discharge efficiency, and also reducing the situation where the glue is blocked in the glue discharge holes 17.

[0058] Reference Figure 4 Two floating rollers 23 are placed in the glue pool 51. The two floating rollers 23 float on the glue liquid, and the two floating rollers 23 are located on both sides of the diameter direction of the coating roller 52. A spiral groove 24 is formed on the outer surface of each floating roller 23, and the spiral direction of the spiral groove 24 is opposite from the middle of the floating roller 23 to the two ends of the floating roller 23. A retaining ring 30 is fixedly installed on both ends of the outer surface of each floating roller 23, and the retaining ring 30 abuts against the outer surface of the coating roller 52. A connecting mechanism 25 is installed on both ends of the two floating rollers 23, and the connecting mechanism 25 connects the two floating rollers 23, so that the retaining rings 30 on the two floating rollers 23 can be pressed against the outer surface of the coating roller 52.

[0059] When the coating roller 52 rotates, the coating roller 52 drives the two floating rollers 23 to rotate through the retaining ring 30, and the floating roller 23 drives the spiral groove 24 to rotate. Since the spiral directions at both ends of the spiral groove 24 are opposite, the spiral groove 24 can guide the bubbles in the glue solution to the two ends of the floating roller 23 during the rotation process, making it difficult for the bubbles to enter the coating roller 52 with the glue solution, thereby making it difficult for bubbles to appear in the composite film.

[0060] The connecting mechanism 25 includes a connecting telescopic rod 251, an elastic telescopic rod 252, a synchronous belt 253 and three synchronous wheels 254. The rotating shafts at the same end of the two floating rollers 23 pass through the two ends of the connecting telescopic rod 251 respectively, and the two synchronous wheels 254 are fixedly installed at the ends of the rotating shafts of the two floating rollers 23. The elastic telescopic rod 252 is fixedly installed in the middle of the connecting telescopic rod 251, and the elastic telescopic rod 252 is perpendicular to the connecting telescopic rod 251. The third synchronous wheel 254 is rotatably installed at the telescopic end at the top of the elastic telescopic rod 252, and the synchronous belt 253 is sleeved on the three synchronous wheels 254.

[0061] The elastic telescopic rod 252 drives the third synchronous wheel 254 to move upward, thereby tensioning the synchronous belt 253. The synchronous belt 253 drives the two floating rollers 23 to move toward each other through the other two synchronous wheels 254, so that the retaining ring 30 on the floating roller 23 can press against the coating roller 52, making it easier for the coating roller 52 to drive the two floating rollers 23 to rotate synchronously.

[0062] The implementation principle of a PVC-PE film composite process in the embodiment of the present application is as follows: the first driving member 54 drives the coating roller 52 to rotate. During the rotation of the coating roller 52, the glue in the glue pool 51 adheres to the coating roller 52. When the PVC film passes between the pressure roller 53 and the coating roller 52, the coating roller 52 applies the glue on the PVC film. When the coating roller 52 drives the glue to move through the scraping gap 8, the scraping plate 6 scrapes off the excess glue on the coating roller 52, so that the thickness of the glue layer is more uniform, thereby improving the composite effect of the film, and the excess glue is stored in the glue storage area 9. The second driving member 701 drives the glue feeding plate 13 to rotate through the glue feeding roller 702. During the rotation of the glue feeding plate 13, the glue in the glue storage area 9 can be pushed from the glue feeding port 11 into the top of the glue discharge groove 10. The glue feed roller 702 drives the conveyor belt 703 to rotate through the driving gear 32, and the conveyor belt 703 drives the conveyor plate 704 to move. The conveyor plate 704 conveys the glue liquid at the top of the glue discharge groove 10 to the bottom of the glue discharge groove 10, so that the glue liquid can be discharged from the glue discharge port 12 at the bottom of the glue discharge groove 10, thereby reducing the glue liquid adhering to the scraper plate 6.

[0063] Embodiment 2:

[0064] Reference Fig. 9 , Fig.10 and Fig.11The difference between this embodiment and the embodiment 1 is that the glue removal mechanism 7 includes a second driving member 701, a glue removal belt 711, a scraper 712, and a first roller 713, a second roller 714, a third roller 715 and a fourth roller 716 rotatably mounted in the glue scraper 6, the first roller 713 is located at the glue inlet 11, the second roller 714 is located at the top of the glue removal groove 10 and above the first roller 713, the third roller 715 is located at the bottom of the glue removal groove 10 and above the glue removal port 12, and the glue removal belt 711 is sleeved on the first roller 713, the second roller 714 and the third roller 715. The fourth roller 716 is located at the top of the glue removal groove 10 and on the side of the first roller 713 close to the glue removal port 12, and the top of the fourth roller 716 abuts against the outer wall of the glue removal belt 711. The second driving member 701 is fixedly mounted on the outer side wall of the scraper plate 6, and the driving end of the second driving member 701 is fixedly connected to the rotating shaft of the third roller body 715. The scraper plate 712 is fixedly mounted on the bottom of the scraper plate 6 at the glue discharge groove 10, the scraper plate 712 is located above the glue discharge port 12, and the top end of the scraper plate 712 abuts against the outer side wall of the glue discharge tape 711.

[0065] The second driving member 701 drives the third roller 715 to rotate, and the third roller 715 drives the adhesive stripping belt 711 to rotate on the first roller 713 and the second roller 714. When the adhesive stripping belt 711 rotates to the first roller 713, the adhesive in the adhesive storage area 9 adheres to the adhesive stripping belt 711, and the adhesive stripping belt 711 transfers the adhesive in the adhesive storage area 9 from the adhesive inlet 11 to the adhesive stripping groove 10 during its rotation. When the adhesive stripping belt 711 drives the adhesive to move to the third roller 715, the scraper 712 scrapes off the adhesive on the adhesive stripping belt 711, and the adhesive is discharged from the adhesive stripping port 12 to the scraper 6 and drips into the adhesive pool 51.

[0066] Both ends of the first roller body 713 in the length direction of the scraper 6 are slidably mounted with first sliders 19 in the thickness direction thereof, and both ends of the first roller body 713 are rotatably mounted in the two first sliders 19. Two adjusting members 20 are rotatably mounted on the top wall of the scraper 6, and the two adjusting members 20 are threadedly penetrated through the scraper 6 and are rotatably connected with the two first sliders 19. Both ends of the fourth roller body 716 in the scraper 6 are slidably mounted with second sliders 21 in the thickness direction thereof, and both ends of the fourth roller body 716 are rotatably mounted in the two second sliders 21. The scraper 6 is provided with elastic members 22 below each second slider 21, and in the present application, the elastic members 22 may be selected as springs.

[0067] When the scraper 6 rotates, the size of the glue removal gap can be adjusted, thereby adjusting the thickness of the glue layer. After the thickness of the glue layer is adjusted, the amount of glue scraped off by the scraper 6 will be different, thereby making the amount of glue stored in the glue storage area 9 different. The two adjusting members 20 are rotated at the same time, and the two adjusting members 20 drive the two first sliders 19 to move up and down in the scraper 6, and the two first sliders 19 drive the first roller body 713 to move up and down in the glue inlet 11, thereby adjusting the size of the glue inlet 11, and then adjusting the glue inlet amount of the glue removal belt 711, so that the glue removal mechanism 7 can be suitable for the glue removal of glue layers of different thicknesses.

[0068] When the first roller 713 moves up and down in the glue inlet 11, the two elastic members 22 push the two second sliders 21 to move up and down in the scraper 6, and the two second sliders 21 drive the fourth roller 716 to move up and down at the top of the glue discharge groove 10. The fourth roller 716 is pressed against the outer surface of the glue discharge belt 711, so that the glue discharge belt 711 can be tensioned.

[0069] The implementation principle of the second embodiment of the present application is as follows: the second driving member 701 drives the third roller 715 to rotate, and the third roller 715 drives the adhesive stripping belt 711 to rotate on the first roller 713 and the second roller 714. When the adhesive stripping belt 711 rotates to the first roller 713, the adhesive in the adhesive storage area 9 adheres to the adhesive stripping belt 711, and the adhesive stripping belt 711 transports the adhesive in the adhesive storage area 9 from the adhesive inlet 11 to the adhesive stripping groove 10 during its rotation. When the adhesive stripping belt 711 drives the adhesive to move to the third roller 715, the scraper 712 scrapes off the adhesive on the adhesive stripping belt 711, and the adhesive is discharged from the adhesive stripping port 12 to the scraper 6 and drips into the adhesive pool 51. By rotating the two adjusting members 20, the two adjusting members 20 drive the two first sliders 19 to move up and down in the scraper plate 6, and the two first sliders 19 drive the first roller body 713 to move up and down in the glue inlet 11, so as to adjust the size of the glue inlet 11, and then adjust the glue feeding amount of the glue removal tape 711, so that the glue removal mechanism 7 can be suitable for the removal of glue layers of different thicknesses.

[0070] The above are only optional embodiments of the present disclosure and are not intended to limit the present disclosure. For those skilled in the art, the present disclosure may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A PVC-PE film composite process, characterized in that: The following steps are involved: S1: Gluing: The PVC substrate is coated with glue by a glue coating mechanism (5); S2: Drying: The PVC substrate after being coated with glue enters the drying tunnel (1) for drying; S3: Lamination: The dried PVC substrate and the PE substrate are laminated by a lamination mechanism (2); S4: Rewinding: The rewinding mechanism (3) rewinds the laminated PVC-PE composite film; In step S1: the glue coating mechanism (5) comprises a glue pool (51), a coating roller (52), a pressure roller (53) and a first driving member (54); the coating roller (52) is rotatably arranged in the glue pool (51); the first driving member (54) is arranged on the outer wall of the glue pool (51) and is used to drive the coating roller (52) to rotate; the lower half of the coating roller (52) is immersed in the glue liquid; the pressure roller (53) is rotatably arranged in the glue pool (51); the bottom of the pressure roller (53) abuts against the top of the coating roller (52); and the PVC film moves between the pressure roller (53) and the coating roller (52); a scraper (6) is arranged in the glue pool (51); the top end of the scraper (6) is inclined toward the coating roller (52); A scraping gap (8) is formed between the top of the scraper (6) and the outer surface of the coating roller (52), a glue storage area (9) is formed between the scraper (6) and the coating roller (52) and below the scraping gap (8), a glue discharge groove (10) is provided in the scraper (6), a glue inlet (11) communicating with the glue storage area (9) and the glue discharge groove (10) is provided at the top of the scraper (6), a glue discharge outlet (12) communicating with the glue discharge groove (10) is provided at the bottom of the scraper (6), a glue discharge mechanism (7) is provided in the scraper (6), the glue discharge mechanism (7) transports the glue in the glue storage area (9) from the glue inlet (11) to the glue discharge groove (10), and then discharges the glue in the glue discharge groove (10) from the glue discharge outlet (12); The glue discharge mechanism (7) comprises a second driving member (701), a glue feed roller (702), a conveyor belt (703) and a plurality of conveyor plates (704); the glue feed roller (702) is rotatably arranged at the glue feed port (11) of the glue scraper (6); the conveyor belt (703) is rotatably arranged in the glue discharge groove (10) of the glue scraper (6); the head and tail ends of the conveyor belt (703) are respectively located near the glue feed port (11) and the glue discharge port (12); the plurality of conveyor plates (704) are fixedly arranged at intervals on the conveyor belt (703); the second driving member (701) is arranged on the side wall of the glue scraper (6) and is used to drive the glue feed roller (702) and the conveyor belt (703) to rotate; A plurality of glue feeding plates (13) are arranged at equal intervals along the circumference of the glue feeding roller (702). The glue feeding plates (13) are arranged inside the glue feeding roller (702) to slide along the diameter direction of the glue feeding roller (702). One side of the glue feeding plates (13) extends outside the glue feeding roller (702). The scraper plate (6) is provided with movable annular grooves (14) on two opposite inner side walls of the glue feeding port (11). Moving blocks (15) are fixedly arranged at both ends of the glue feeding plate (13). The two moving blocks (15) are respectively slidably arranged in two movable annular grooves (14), the scraper plate (6) is located at the top end of the glue discharge groove (10) to form a scraper strip (16), the scraper strip (16) abuts against the outer wall of the glue feed roller (702), and the side of the movable annular groove (14) close to the scraper strip (16) is inwardly recessed to form an inner concave portion (141), when the movable block (15) moves to the inner concave portion (141) of the movable annular groove (14), the glue feed plate (13) moves inwardly into the glue feed roller (702).

2. A PVC-PE film composite process according to claim 1, characterized in that: The movable annular groove (14) protrudes outwards on one side close to the glue storage area (9) to form an outer convex portion (142). When the movable block (15) moves to the outer convex portion (142) of the movable annular groove (14), the glue feeding plate (13) moves outwards and extends.

3. A PVC-PE film composite process according to claim 1, characterized in that: The coating roller (52) rotates in opposite directions to the glue feed roller (702), and the glue feed roller (702) rotates in opposite directions to the conveyor belt (703). The scraper plate (6) is located at the bottom of the glue discharge groove (10) and is provided with a plurality of glue discharge holes (17) spaced apart from each other.

4. A PVC-PE film composite process according to claim 3, characterized in that: A plurality of heating strips (18) are arranged in the scraper plate (6), and the plurality of heating strips (18) are interspersed between the plurality of glue discharge holes (17).

5. A PVC-PE film composite process according to claim 1, characterized in that: Floating rollers (23) are placed on both sides of the coating roller (52) in the glue pool (51), and spiral grooves (24) are formed on the outer surfaces of the floating rollers (23). Connecting mechanisms (25) are provided at both ends of the two floating rollers (23). The connecting mechanisms (25) comprise a connecting telescopic rod (251), an elastic telescopic rod (252), a synchronous belt (253) and three synchronous wheels (254). The elastic telescopic rod (252) is fixedly arranged at the middle of the outer surface of the connecting telescopic rod (251) in the vertical direction. The three synchronous wheels (254) are rotatably arranged at the two ends of the connecting telescopic rod (251) and the top of the elastic telescopic rod (252). The synchronous belt (253) is sleeved on the three synchronous wheels (254). The ends of the two floating rollers (23) pass through the two ends of the connecting telescopic rod (251) and are fixedly connected to the two synchronous wheels (254).

6. A PVC-PE film composite process, characterized in that: The following steps are involved: S1: Gluing: The PVC substrate is coated with glue by a glue coating mechanism (5); S2: Drying: The PVC substrate after being coated with glue enters the drying tunnel (1) for drying; S3: Lamination: The dried PVC substrate and the PE substrate are laminated by a lamination mechanism (2); S4: Rewinding: The rewinding mechanism (3) rewinds the laminated PVC-PE composite film; In step S1: a glue-spreading plate (6) is provided in the glue-spreading mechanism (5), and a glue-discharging mechanism (7) is provided in the glue-spreading plate (6); The glue removal mechanism (7) comprises a second driving member (701), a glue removal belt (711), a scraper (712), a first roller (713), a second roller (714), a third roller (715) and a fourth roller (716), wherein the first roller (713) is rotatably arranged at the glue inlet (11) of the scraper (6), the second roller (714) is rotatably arranged at the top of the glue removal groove (10) of the scraper (6), the third roller (715) is rotatably arranged at the bottom of the glue removal groove (10) of the scraper (6), and the glue removal belt (711) is sleeved on the first roller. The first roller body (713), the second roller body (714) and the third roller body (715) are arranged on the side wall of the scraper plate (6) and are used to drive the third roller body (715) to rotate. The scraper plate (712) is arranged above the glue discharge port (12) in the scraper plate (6), and the scraper plate (712) abuts against the glue discharge tape (711). The fourth roller body (716) is rotatably arranged in the glue discharge groove (10) of the scraper plate (6) on one side close to the glue discharge port (12), and the top of the outer surface of the fourth roller body (716) abuts against the outer wall of the glue discharge tape (711).

7. A PVC-PE film composite process according to claim 6, characterized in that: A first slider (19) is slidably mounted in the scraper (6) along the thickness direction thereof, and two first sliders (19) are mounted therein. Two ends of the first roller body (713) are rotatably mounted in the two first sliders (19). Two adjusting members (20) are arranged in the scraper (6), and the adjusting members (20) are used to drive the first slider (19) to move up and down in the scraper (6). A second slider (21) is slidably mounted in the scraper (6) along the thickness direction thereof, and two second sliders (21) are mounted therein. Two ends of the fourth roller body (716) are rotatably mounted in the two second sliders (21). Two elastic members (22) are arranged in the scraper (6), and the top ends of the two elastic members (22) respectively abut against the bottom ends of the two second sliders (21).

Images