PVC (polyvinyl chloride) film laminating treatment device

Abstract

The invention belongs to the technical field of PVC film lamination, and particularly relates to a PVC film lamination treatment device which comprises a shell, a traction roller is arranged in front of the shell, a hot pressing roller is arranged behind the traction roller, a driven roller is arranged behind the shell, and the driven roller is arranged behind the shell. A gain assembly used for preprocessing a multi-layer PVC film before hot press forming is arranged in front of a driven roller, an eccentric wheel rotates in a fixed shell, the eccentric wheel rotates to drive a sliding block to rotate, meanwhile, the eccentric wheel stretches and retracts in the sliding block, and therefore intermittent contact between a pull roller driven by the sliding block and the film is controlled; and therefore, the film is intermittently tensioned, an adhesive is uniformly smeared and the like, the surface of the PVC film can be effectively pretreated, and the laminating treatment quality of the PVC film is improved.

Description

Technical Field

[0001] This invention belongs to the field of PVC film lamination technology, specifically a PVC film lamination processing device. Background Technology

[0002] Polyvinyl chloride (PVC) film is a polymer film made from PVC resin as the base material, with the addition of plasticizers, stabilizers and other additives, and produced through calendering, extrusion or blow molding processes. Its core characteristics include chemical resistance, flexibility and electrical insulation, and it is widely used in packaging, construction, medical and other fields.

[0003] Since single-layer PVC film is relatively thin, its mechanical properties and functionality are difficult to meet the requirements of industrial applications. At this time, through lamination technology, PVC films with different formulations (such as rigid film, flexible film, modified film) can be combined with other functional materials (such as aluminum foil, fiber cloth, nano-coating) to form composite films with gradient structures.

[0004] In current technologies, PVC film lamination typically employs cold or hot pressing processes to achieve interlayer bonding. During hot pressing, the hot press roller applies pressure to the film while rotating, thus laminating multiple layers. Due to the influence of the roller's weight or external airflow, the weight of each layer can cause the lower layers to shift under pressure, leading to misalignment. In such cases, pretreatment of the unlaminated PVC film is necessary. Therefore, this invention provides a PVC film lamination device. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0006] The technical solution adopted by the present invention to solve its technical problem is as follows: The PVC film lamination processing device of the present invention includes a housing, a traction roller is arranged in front of the housing, a hot press roller is arranged behind the traction roller, a driven roller is arranged behind the housing, and a gain component for pre-processing multi-layer PVC film before hot pressing is arranged in front of the driven roller. The gain component includes a motor and a fixed housing. An eccentric wheel is rotatably mounted inside the fixed housing. A sliding block is slidably connected inside the eccentric wheel. A spring post is positioned between one end of the sliding block and the eccentric wheel. A fixed rod is fixedly connected inside the sliding block. A semi-circular shell is fixedly connected to the surface of the fixed rod. A pull roller is rotatably connected inside the semi-circular shell, and the surface of the pull roller has an arc groove. The pull roller slides in contact with a sliding column through the arc groove. A transmission rod is rotatably connected inside the fixed rod. A gear is fixedly connected to one end of the transmission rod. A rack is fixedly connected inside the fixed housing. The eccentric wheel is eccentrically mounted inside the fixed housing. The sliding column and the semi-circular shell are fixedly connected. The pull roller and the transmission rod are splined.

[0007] Preferably, the output end of the motor is fixedly connected to a drive shaft, and a pulley is fixedly connected to the surface of the drive shaft. The pulley can drive another set of cooperating components under the PVC film to pre-treat the film through a belt. A working chamber is fixedly connected to the surface of the fixed shell, and a fixed plate is fixedly connected to the front of the working chamber. A coil spring is provided on one side of the pull roller, and one end of the drive rod is elastically connected to the coil spring.

[0008] Preferably, the eccentric wheel has a through groove for sliding the sliding block, and the through groove is trapezoidal near the axis of the eccentric wheel. When the sliding block is located in the trapezoidal position in the through groove, the two sides of the sliding block are not in contact with the eccentric wheel, and there is a gap between the two sides of the sliding block and the through groove inside the eccentric wheel.

[0009] Preferably, an auxiliary gain component is configured below the fixed plate to pre-treat the PVC film. The auxiliary gain component includes an electric cylinder, and an ironing plate is disposed below the electric cylinder. The electric cylinder drives the ironing plate to move towards the edge of the PVC film. The electric cylinder is fixedly connected to the fixed plate.

[0010] Preferably, the upper and lower sides of the fixing plate are threaded with screws, and the lower side of the screws is rotatably connected with an adjusting roller. The rotation of the two sets of screws drives the two sets of adjusting rollers to move towards the position of the film. The adjusting rollers are slidably connected to the inner side of the fixing plate.

[0011] Preferably, a hot air blower is provided in front of the fixed plate, and an adhesive applicator is provided in the middle of the multiple sets of driven rollers. The adhesive applicator is used to apply adhesive to the contact surfaces between the films, and the hot air blower is used to dry the adhesive after application.

[0012] Preferably, two sets of electric cylinders are fixedly connected to the surface of the fixed plate, and a connecting plate is provided between the two sets of heating plates. The electric cylinder drives the heating plates to work and also drives the connecting plate to move. The heating plates are horizontally arranged on the surface of the connecting plate, and the connecting plate is made of a high-temperature resistant material.

[0013] Preferably, the center line of the eccentric wheel is set towards the side closer to the PVC film surface. When the sliding block rotates, its surface will contact the inner wall of the fixed shell on the side closer to the film. The surface of the through groove inside the eccentric wheel is provided with an anti-collision pad. The position where the sliding block contacts the inside of the fixed shell is set in an arc shape.

[0014] Preferably, one side of the coil spring is fixedly connected to the semi-circular shell, the transmission shaft is rotatably connected to the fixed shell, the fixed plate is fixedly connected to the shell, the transmission shaft drives the eccentric wheel to rotate inside the fixed shell, and the coil spring drives the transmission rod to reverse inside the fixed rod.

[0015] Preferably, the diameter of the semi-circular shell is larger than the diameter of the pull roller, the transmission rod passes through the inside of the fixed rod, the transmission rod has a spline on its surface inside the semi-circular shell, the transmission rod drives the pull roller to rotate through the spline, and an adjusting mechanism for adjusting the distance between the two sets of hot press rollers is arranged behind the traction roller.

[0016] The beneficial effects of this invention are as follows: 1. The PVC film lamination device of the present invention uses an eccentric wheel to rotate inside a fixed shell. The rotation of the eccentric wheel drives the sliding block to rotate and simultaneously perform telescopic movement inside the shell. This controls the intermittent contact between the roller driven by the sliding block and the film, thereby intermittently tightening the film and spreading the adhesive, effectively pre-treating the surface of the PVC film and improving the quality of the PVC film lamination process.

[0017] 2. The PVC film lamination device of the present invention uses an electric cylinder to drive a heating plate to move towards the edge of a multi-layer PVC film. After the film is tightened by the pull roller, the edge of the film can be quickly heat-bonded, which can pre-fix the PVC film and make the multi-layer film tightly bonded, thereby further improving the quality of PVC film lamination. Attached Figure Description

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

[0019] Figure 1 This is a perspective view of the present invention; Figure 2 This is a schematic diagram of the internal structure of the housing of the present invention; Figure 3 This is a schematic diagram of the component structure in this invention; Figure 4 This is a schematic diagram of a partial component structure of the cooperating assembly in this invention; Figure 5 In this invention Figure 4 A partial cross-sectional view; Figure 6 This is a schematic diagram of the structure of the gear and rack in this invention; Figure 7 In this invention Figure 6 The front view; Figure 8 This is an exploded view of the semi-circular shell roller in this invention; Figure 9 This is a schematic diagram of the screw structure in this invention; Figure 10 This is a schematic diagram of the heating plate and electric cylinder in this invention; Figure 11 In this invention Figure 10 Another perspective structural diagram; In the diagram: 1. Housing; 2. Traction roller; 3. Driven roller; 4. Hot press roller; 5. Adjusting machine; 6. Working chamber; 7. Hot air blower; 8. Fixed plate; 100. Matching assembly; 101. Electric cylinder; 102. Hot plate; 103. Screw; 104. Adjusting roller; 105. Connecting plate; 106. ; 200. Gaining assembly; 201. Electric motor; 202. Drive shaft; 203. Pulley; 204. Fixed housing; 205. Fixed rod; 206. Pull roller; 207. Coil spring; 208. Eccentric wheel; 209. Sliding block; 210. Gear; 211. Drive rod; 212. Rack; 213. Spring column; 214. Semi-circular shell; 215. Sliding column. Detailed Implementation

[0020] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0021] like Figures 1 to 8 As shown, a PVC film lamination processing device according to an embodiment of the present invention includes a housing 1, a traction roller 2 is arranged in front of the housing 1, a hot press roller 4 is arranged behind the traction roller 2, a driven roller 3 is arranged behind the housing 1, and a gain component 200 for pre-processing multilayer PVC film before hot pressing is arranged in front of the driven roller 3. The gain assembly 200 includes a motor 201 and a fixed housing 204. An eccentric wheel 208 is rotatably mounted inside the fixed housing 204. A sliding block 209 is slidably connected inside the eccentric wheel 208. A spring post 213 is positioned between one end of the sliding block 209 and the eccentric wheel 208. A fixed rod 205 is fixedly connected inside the sliding block 209. A semi-circular shell 214 is fixedly connected to the surface of the fixed rod 205. A pull roller 206 is rotatably connected inside the semi-circular shell 214. The surface of roller 206 is provided with an arc groove. The roller 206 slides in contact with the sliding column 215 through the arc groove. The fixed rod 205 is rotatably connected to the transmission rod 211. One end of the transmission rod 211 is fixedly connected to the gear 210. The fixed shell 204 is fixedly connected to the rack 212. The eccentric wheel 208 is eccentrically set inside the fixed shell 204. The sliding column 215 is fixedly connected to the semi-circular shell 214. The roller 206 and the transmission rod 211 are splined connected.

[0022] This invention takes into account that before hot pressing, multi-layer PVC films are stacked together. If the multi-layer film is directly fed to the hot press roller 4 for hot pressing, gaps exist between the films, and voids form on the surface during transport, making the film surface prone to loosening. Directly laminating the film in this state will cause wrinkles and bubbles to form under thermal stress and shear force during hot pressing, affecting the quality of the laminated PVC film. Therefore, the operator first installs the entire roll of film onto the surface of the driven roller 3, and then sequentially feeds the multi-layer film from both sides... The film passes through the middle of the adjusting roller 104, allowing it to reach the interior of the working chamber 6. Then, the film passes through the middle of the two sets of fixing rods 205 inside the working chamber 6, facilitating surface treatment of the film. Finally, it passes through the interior of the two sets of hot-pressing rollers 4, fixing one end of the film to the traction roller 2. The traction roller 2 not only transports the film but also collects the film after hot pressing, facilitating subsequent edge trimming. When the film undergoes pre-treatment before being transported to the hot-pressing rollers 4 for hot pressing, the eccentric wheel 208 rotates inside the fixed housing 204, causing the film to... The rotation of the eccentric wheel 208 drives the sliding block 209 to rotate, which in turn drives the fixed rod 205 to rotate. Since the eccentric wheel 208 is eccentrically positioned inside the fixed housing 204 (i.e., their center lines are not on the same horizontal line), when the sliding block 209 rotates to a position away from the axis of the fixed housing 204, it is pressed against the inner wall of the fixed housing 204, causing it to slide inside the eccentric wheel 208. This, in turn, changes the position of the fixed rod 205 during rotation. It should be noted that the movement of the sliding block 209 causes the fixed rod 205 to move closer to the membrane surface. When the sliding block 209 is squeezed to its limit by the inner wall of the fixed shell 204, the pull roller 206 inside the semi-circular shell 214 will contact the surface of the PVC film. Since the film is always in a moving state during the lamination process, and the rotation direction of the eccentric wheel 208 is opposite to the direction of film movement, when the pull roller 206 contacts the surface of the PVC film, it will tighten the film, so that the film continues to move in a taut state. This can prevent the film that is about to be laminated by the hot press roller 4 from becoming loose, and can improve the quality of the film when it is laminated by the hot press roller 4, thereby improving the quality of the film after hot pressing. It should be further explained that, since a semi-circular shell 214 is fixedly connected to the middle position of the fixed rod 205, when the fixed rod 205 rotates, it will drive the semi-circular shell 214 to rotate as well. The rotation of the semi-circular shell 214 will drive the pull roller 206 and the coil spring 207 to rotate. When the pull roller 206 moves with the fixed rod 205 to the position where the eccentric wheel 208 is closest to the inner wall of the fixed shell 204, the pull roller 206 will come into contact with the moving PVC film, which can tighten the film and facilitate the hot press roller 4 to laminate the film. The pressure process involves a transmission rod 211 internally connected to the fixed rod 205. As the fixed rod 205 rotates with the sliding block 209, the transmission rod 211 also drives the gear 210 to rotate. When the fixed rod 205 and the transmission rod 211 are about to reach their furthest distance from the axis of the fixed housing 204, the gear 210 driven by the transmission rod 211 engages with the rack 212 in advance, causing the transmission rod 211 to rotate. Furthermore, one end of the transmission rod 211 is connected to the pull roller 206. One side is fixedly connected, so when the transmission rod 211 rotates, it can drive the pull roller 206 to rotate and contact the film at the same time, thereby tightening the film. Since the surface of the pull roller 206 has an arc groove, and the inside of the arc groove has a sliding contact with the sliding column 215, when the transmission rod 211 meshes with the rack 212 and rotates, the transmission rod 211 will drive the pull roller 206 to rotate. When the pull roller 206 rotates, it will contact the sliding column 215, so that the pull roller 206 moves instantaneously closer to the fixed shell 204 during the rotation. At this time, the pull roller 206 can move to both sides while tightening the film. When the pull roller 206 contacts the film, it is located in the middle of the film. When it rotates, it can change the position of contact with the film, pulling the film from the middle to both sides, which can keep the surface of the film in a tight state, improve the adhesion of multiple sets of films before hot pressing. Multiple sets of films can be tightly adhered and transported to the position of the hot pressing roller 4, where they are hot pressed and formed by the hot pressing roller 4, improving the quality of hot pressing of the film by the hot pressing roller 4.

[0023] like Figure 3 As shown, the output end of the motor 201 is fixedly connected to the drive shaft 202, and the surface of the drive shaft 202 is fixedly connected to the pulley 203. The pulley 203 can drive another set of cooperating components 100 under the PVC film to pre-treat the film through the belt. The surface of the fixed shell 204 is fixedly connected to the working chamber 6, and the front of the working chamber 6 is fixedly connected to the fixed plate 8. A coil spring 207 is provided on one side of the pull roller 206, and one end of the transmission rod 211 is elastically connected to the coil spring 207.

[0024] During operation, this invention takes into account that when the surface of the film is pretreated by the mating component 100 on the upper part of the film alone, since multiple sets of films are stacked together, the film below will also be loose before being hot-pressed by the hot press roller 4. Therefore, by setting two sets of mating components 100 on the upper and lower sides of the film respectively to pretreat its surface, the tension of the film can be made the same when the pull roller 206 is tightening the film, so that the films can be better bonded together and the quality of PVC film lamination can be improved. It should be noted that when the motor 201 drives the pulley 203 to rotate through the transmission shaft 202, the rotation of the pulley 203 can drive a set of transmission shafts 202 below to rotate through the belt, so that when the two sets of pull rollers 206 in contact with the membrane tighten the membrane, the membrane can be subjected to the simultaneous pulling force of the two sets of pull rollers 206, which can avoid damage to the surface of the membrane. It should be further explained that the gear 210 at one end of the transmission rod 211 meshes with the rack 212. At this time, the pull roller 206 rotates and is guided by the slide column 215 to move towards the side closer to the fixed shell 204, improving the contact between the pull roller 206 and the film, and fully tightening the upper and lower surfaces of the film. The forward rotation of the transmission rod 211 can apply external force to the coil spring 207, thereby causing the coil spring 207 to wind up and store elasticity. When the gear 210 is not meshed with the rack 212, the coil spring 207 will release the force applied to it by the transmission rod 211, thereby driving the transmission rod 211 to reverse. At this time, since the pull roller 206 and the transmission rod 211 are splined, when the transmission rod 211 reverses, it can drive the pull roller 206 to reverse. The pull roller 206 is again limited by the slide column 215 to perform the reset work, which can enable the pull roller 206 to quickly reset after contacting the film, effectively improving the efficiency of the pull roller 206 in tightening the film.

[0025] like Figures 5 to 7 As shown, the eccentric wheel 208 has a through groove for the sliding block 209 to slide inside, and the through groove is trapezoidal near the axis of the eccentric wheel 208. When the sliding block 209 is in the trapezoidal position in the through groove, the two sides of the sliding block 209 are not in contact with the eccentric wheel 208, and there is a gap between the two sides of the sliding block 209 and the through groove inside the eccentric wheel 208.

[0026] During operation, when the eccentric wheel 208 rotates, driving the sliding block 209 to rotate, when the sliding block 209 rotates to the position furthest from the axis of the fixed housing 204, it will be fully compressed by the inner wall of the fixed housing 204. This causes the sliding block 209 to move along the axis of the eccentric wheel 208 within the through groove inside the eccentric wheel 208. When the sliding block 209 rotates to a position closer to the axis of the fixed housing 204, the elastic force of the spring post 213 allows it to slowly slide within the through groove inside the eccentric wheel 208. It should be noted that when the sliding block 209 slowly slides under the elastic force of the spring post 213, it is due to the... The through groove near the axis of the eccentric wheel 208 is rectangular. When the sliding block 209 moves outward, it will be gradually limited by the two sides of the through groove. This ensures that the end of the sliding block 209 near the axis of the eccentric wheel 208 is always in contact with the inner side of the through groove. This prevents the sliding block 209 from driving the fixed rod 205 to rotate. If the sliding block 209 is not limited, it will continuously collide or rub against the side wall of the through groove during rotation. Over time, this will damage the sliding block 209 and affect the operation of the roller 206 inside the fixed rod 205 to tighten the PVC film. This improves the stability of the sliding block 209 during use. It should be further explained that when the sliding block 209 is pressed by the inner wall of the fixed shell 204, the sliding block 209 will slowly move towards the axis of the eccentric wheel 208 within the through groove inside the eccentric wheel 208. When one end of the sliding block 209 near the axis of the eccentric wheel 208 is located in the rectangular part of the through groove, and there is a gap between the side of the sliding block 209 and the side of the through groove, the sliding block 209 will shift inside the through groove. This prevents the sides of the sliding block 209 from continuously contacting the sides of the through groove. At this time, when the roller 206 contacts the membrane, it is a "hard contact," which may damage the membrane surface. However, when the sliding block 209 drives the roller 206 inside the fixed rod 205 to contact the membrane, it is a "soft contact," which can protect the membrane. The surface is protected, and because multiple sets of spring columns 213 are provided between the sliding block 209 and the eccentric wheel 208, even if the pull roller 206 makes "soft contact" with the film surface, the spring column 213 will be subject to a resistance from the pull roller 206, causing the spring column 213 to bend slightly. After the spring column 213 bends slightly, it can also apply a reaction force to the pull roller 206, so that while the pull roller 206 makes "soft contact" with the film surface, it can also apply a sufficient force to tighten the film surface. After the film is tightened, it is in a taut state, which facilitates the lamination of multi-layer films by the hot press roller 4, thereby improving the quality of the overall PVC lamination process and avoiding a large number of defective products after hot pressing by the hot press roller 4.

[0027] like Figures 9 to 11 As shown, an auxiliary gain component 200 is configured below the fixed plate 8 to pre-treat the PVC film. The auxiliary gain component 200 includes an electric cylinder 101. A heating plate 102 is disposed below the electric cylinder 101. The electric cylinder 101 drives the heating plate 102 to move towards the edge of the PVC film. The electric cylinder 101 is fixedly connected to the fixed plate 8.

[0028] The present invention also considers that when the pull roller 206 tightens the loose part of the film, if the tightened film cannot be hot-pressed in time, the surface of the film will still be in a relatively loose state after the pull roller 206 loses contact with the film, which will still affect the effect of the hot pressing roller 4 on the film. Therefore, when the pull roller 206 tightens the film, the electric cylinder 101 is activated to drive the heating plate 102 to move to both sides of the film. Since the heating plate 102 is always in a high temperature state, when the two sets of heating plates 102 move to both sides of the film at the same time, the two sides of the film tightened by the pull roller 206 will be subjected to thermal stress instantly, thereby performing a pre-adhesion. This ensures that after the pull roller 206 tightens the film, the tightened film will not be in a relatively loose state again, and the tightly bonded film can be pre-fixed as a whole, which can effectively improve the hot pressing effect of the hot pressing roller 4 on the conveyed film. It should be noted that when the pull roller 206 tightens the film, the electric cylinder 101 will drive the edge of the heating plate 102 to preheat and bond it. This can prevent the heating plate 102 from preheating and bonding the edge before the pull roller 206 tightens the film surface, thus affecting the quality of the pull roller 206 tightening the film. It should be further explained that, since the sliding block 209 will continuously rotate to tighten the film with the pull roller 206, when the pull roller 206 rotates 180° with the sliding block 209, the electric cylinder 101 will drive the heating plate 102 to make a reciprocating motion. The initial position of the heating plate 102 is located on the upper and lower sides of the film edge. Therefore, after the pull roller 206 tightens the film surface twice, the edge of the film will be thermally bonded. This can prevent the pull roller 206 from not fully tightening the film after tightening it once. After the heating plate 102 thermally bonds the edge of the film, the surface of the film will still be relatively loose. This can effectively improve the quality of pre-fixing the film and improve the quality of lamination of the conveyed film by the hot press roller 4.

[0029] like Figure 9 As shown, screws 103 are threadedly connected to the upper and lower sides of the fixed plate 8, and adjusting rollers 104 are rotatably connected to the lower side of the screws 103. The rotation of the two sets of screws 103 drives the two sets of adjusting rollers 104 to move towards the position of the film. The adjusting rollers 104 are slidably connected to the inner side of the fixed plate 8.

[0030] During operation, since the thickness of the PVC films may vary, the thickness of the multilayer films before being hot-pressed by the hot-press roller 4 is also different. Therefore, by rotating the screw 103 to drive the two sets of adjusting rollers 104 to move towards the surface of the film, the films of different thicknesses can be limited, and the thickness of the film can be fixed before pretreatment. This improves the effect of the gain component 200 on the pretreatment of the film surface when pretreating films of different thicknesses. It should be further noted that when the film is not pulled through the inside of the adjusting roller 104 by the driven roller 3, the screw 103 can be rotated in the opposite direction to drive the adjusting roller 104 to slide on the inner wall of the fixed plate 8, providing convenience for the operator to thread the film. After the film threading is completed, the gap between the adjusting rollers 104 can be controlled by the screw 103 to pre-fit the film in advance, which facilitates the pretreatment of the film surface.

[0031] like Figures 1 to 2 and Figures 10 to 11 As shown, a hot air blower 7 is installed in front of the fixed plate 8, and an adhesive applicator is installed in the middle of the multiple sets of driven rollers 3. The adhesive applicator is used to apply adhesive to the contact surface between the films, and the hot air blower 7 is used to dry the adhesive after it has been applied.

[0032] During operation, in order to improve the quality of PVC film lamination, adhesive needs to be applied between the films. The PVC film is pre-fixed again before lamination. Therefore, when the driven roller 3 is driven by the traction roller 2 to perform lamination, the glue applicator is started to apply a small amount of adhesive to both sides of the film, but at a certain distance from the edge of the film. After the film with adhesive is applied moves through the middle position of the two sets of adjusting rollers 104, the squeezing force of the adjusting rollers 104 on the film can not only make the films fully adhered, but also distribute the applied adhesive evenly between the films. This can prevent the adhesive between the two layers of film from being applied too much, which would affect the quality of the subsequent hot pressing of the film by the hot pressing roller 4. It should be noted that when the film after applying the adhesive moves through the gap in the middle of the adjusting roller 104 to the middle position of the two sets of connecting plates 105, at this time, the pull roller 206 tightens the film. Since both the upper and lower surfaces of the film will be in contact with the pull roller 206, the two sets of pull rollers 206 can further squeeze the applied adhesive while tightening the film, so that the adhesive is distributed more evenly and the effect of adhesive application is further improved. It should be further explained that when the pull roller 206 rotates 180° with the sliding block 209, the electric cylinder 101 will drive the heating plate 102 to make a reciprocating motion. Therefore, when the position after the pull roller 206 is squeezed moves to both sides of the heating plate 102, the heating plate 102 can intermittently heat-bond the edge of the squeezed and spread film. This can prevent the remaining adhesive from flowing to the edge of the film after being squeezed by the adjusting roller 104 and the pull roller 206. This can improve the sealing of the adhesive and prevent the adhesive from adhering to the surface of the hot press roller 4 when the hot press roller 4 is hot-pressing the PVC film, which would affect the subsequent lamination of the multilayer film and improve the quality of the lamination of the PVC film by the hot press roller 4. It should be further explained that after the film, which is squeezed by the adjusting roller 104 and the pulling roller 206, moves to both sides of the hot plate 102 for heat bonding, the film continues to move until it is heat-pressed by the hot press roller 4. When the film is conveyed to the middle position of the hot press roller 4, the hot air blower 7 is started to blow hot air onto the processed film. On the one hand, this can improve the pre-fixation effect of the film before heat pressing, and on the other hand, it can air dry the applied adhesive. This prevents the adhesive from being subjected to the thermal stress of the hot press roller 4 after the film with the applied adhesive comes into contact with it, thus avoiding the generation of a large number of air bubbles. This can improve the overall quality of the PVC film after lamination.

[0033] like Figures 10 to 11 As shown, two sets of electric cylinders 101 are fixedly connected to the surface of the fixed plate 8. A connecting plate 105 is provided between the two sets of heating plates 102. While the electric cylinders 101 drive the heating plates 102 to work, they also drive the connecting plate 105 to move. The heating plates 102 are horizontally set on the surface of the connecting plate 105. The connecting plate 105 is made of a high-temperature resistant material.

[0034] During operation, in order to prevent the traction roller 2 from damaging the electric cylinder 101 when it generates thermal stress, thereby affecting the synchronous movement of the two sets of electric cylinders 101 driving the heating plate 102, a connecting plate 105 is provided between the electric cylinder 101 and the heating plate 102. Since the connecting plate 105 is made of high-temperature resistant heat insulation material, the high temperature continuously generated by the heating plate 102 during operation will be effectively isolated by the connecting plate 105, so that the high temperature will not affect the synchronous movement of the electric cylinder 101, thereby improving the protection of the electric cylinder 101 and improving the effect of the heating plate 102 on the thermal bonding of the PVC film edge.

[0035] like Figures 3 to 4 As shown, the center line of the eccentric wheel 208 is set towards the side closer to the PVC film surface. When the sliding block 209 rotates, its surface will contact the inner wall of the fixed shell 204 near the film. The surface of the through groove inside the eccentric wheel 208 is provided with anti-collision pads. The position where the sliding block 209 contacts the inside of the fixed shell 204 is set in an arc shape.

[0036] During operation, when the drive shaft 202 drives the eccentric wheel 208 to rotate inside the fixed housing 204, setting the contact position between the sliding block 209 and the fixed housing 204 in an arc shape can increase the contact area between the sliding block 209 and the inner wall of the fixed housing 204 during rotation. This improves the stability when the sliding block 209 drives the fixed rod 205 to rotate, and also improves the effect of the fixed rod 205 driving the pull roller 206 to tighten the film. It should be noted that when one end of the sliding block 209 is located in the trapezoidal position of the through groove, even if the sliding block 209 moves from the closest position to the axis of the eccentric wheel 208 and shakes inside the through groove, the anti-collision pad can prevent damage to the surface of the sliding block 209 after prolonged contact with the inner side of the eccentric wheel 208, thus affecting the normal use of the sliding block 209.

[0037] like Figures 4 to 5 As shown, one side of the coil spring 207 is fixedly connected to the semi-circular shell 214, the drive shaft 202 is rotatably connected to the fixed shell 204, the fixed plate 8 is fixedly connected to the shell 1, the drive shaft 202 drives the eccentric wheel 208 to rotate inside the fixed shell 204, and the coil spring 207 drives the drive rod 211 to reverse inside the fixed rod 205.

[0038] During operation, since one side of the coil spring 207 is fixedly connected to the semi-circular shell 214, when the transmission rod 211 rotates to drive the coil spring 207 to wind up, the position of the coil spring 207 will remain stationary. This allows the rotation of the transmission rod 211 to drive the pull roller 206 to move. It should be noted that since the semi-circular shell 214 is fixedly connected to the sliding column 215, when the gear 210 at one end of the transmission rod 211 no longer meshes with the rack 212, the coil spring 207 can release the winding force, which can drive the transmission rod 211 to reverse, thereby causing the pull roller 206 to move quickly. The roller 206 is quickly reset, and because the coil spring 207 is located on one side of the pull roller 206, when the pull roller 206 reverses and resets, one side of the pull roller 206 will contact the coil spring 207 instead of directly contacting the semi-circular shell 214, thereby improving the protection of the pull roller 206. Furthermore, when the coil spring 207 releases the winding force, it will not quickly drive the transmission rod 211 to rotate. This also allows the pull roller 206 to slide against the slide column 215 during the reverse process, reducing the friction between the semi-circular shell 214 and the slide column 215 and improving their service life.

[0039] like Figures 2 to 5 As shown, the diameter of the semi-circular shell 214 is larger than the diameter of the pull roller 206. The transmission rod 211 passes through the inside of the fixed rod 205. The transmission rod 211 has a spline on its surface inside the semi-circular shell 214. The transmission rod 211 drives the pull roller 206 to rotate through the spline. An adjusting mechanism 5 for adjusting the distance between the two sets of hot press rollers 4 is arranged behind the traction roller 2.

[0040] During operation, when hot-pressing PVC films of different thicknesses is required, the adjusting machine 5 needs to be activated to adjust the gap between the hot-pressing rollers 4 to adapt to the hot-pressing of films of different thicknesses, thereby improving the practicality of the device. Furthermore, by placing the transmission rod 211 inside the fixed rod 205, when the transmission rod 211 drives the gear 210 to mesh with the rack 212, the fixed rod 205 will not rotate. This prevents the fixed rod 205 from rotating and causing the pull roller 206 to move, thus improving the position of the pull roller 206. The accuracy of the position when the roller 206 contacts the film is ensured. Simultaneously, because the surface of the transmission rod 211 is provided with splines, and the inside of the pull roller 206 has a spline groove to cooperate with it, the transmission rod 211 can drive the pull roller 206 to contact the film. Relying on the friction between the pull roller 206 and the film, and the guiding force of the sliding column 215, the pull roller 206 can move smoothly when in contact with the film, fully tightening the film and improving the efficiency of the hot pressing roller 4 in hot pressing the PVC film, thereby ensuring the quality of the PVC film lamination process.

[0041] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A PVC film lamination processing device, characterized in that: The device includes a housing, a traction roller is disposed in front of the housing, a hot press roller is disposed behind the traction roller, a driven roller is disposed behind the housing, and a gain component for pre-processing multi-layer PVC film before hot pressing is disposed in front of the driven roller. The gain component includes a motor and a fixed housing. An eccentric wheel is rotatably mounted inside the fixed housing. A sliding block is slidably connected inside the eccentric wheel. A spring post is positioned between one end of the sliding block and the eccentric wheel. A fixed rod is fixedly connected inside the sliding block. A semi-circular shell is fixedly connected to the surface of the fixed rod. A pull roller is rotatably connected inside the semi-circular shell, and the surface of the pull roller has an arc groove. The pull roller slides in contact with a sliding column through the arc groove. A transmission rod is rotatably connected inside the fixed rod. A gear is fixedly connected to one end of the transmission rod. A rack is fixedly connected inside the fixed housing. The eccentric wheel is eccentrically mounted inside the fixed housing. The sliding column and the semi-circular shell are fixedly connected. The pull roller and the transmission rod are splined.

2. The PVC film lamination processing apparatus according to claim 1, characterized in that: The output end of the motor is fixedly connected to a drive shaft, and a pulley is fixedly connected to the surface of the drive shaft. The pulley can drive another set of cooperating components under the PVC film to pre-treat the film through a belt. A working chamber is fixedly connected to the surface of the fixed shell, and a fixed plate is fixedly connected to the front of the working chamber. A coil spring is provided on one side of the pull roller, and one end of the drive rod is elastically connected to the coil spring.

3. The PVC film lamination processing apparatus according to claim 2, characterized in that: The eccentric wheel has a through groove for the sliding block to slide, and the through groove is trapezoidal near the axis of the eccentric wheel. When the sliding block is in the trapezoidal position in the through groove, the two sides of the sliding block are not in contact with the eccentric wheel, and there is a gap between the two sides of the sliding block and the through groove inside the eccentric wheel.

4. The PVC film lamination processing apparatus according to claim 2, characterized in that: Below the fixed plate is a cooperating component for pre-treating the PVC film using an auxiliary gain component. The cooperating component includes an electric cylinder, and below the electric cylinder is a heating plate. The electric cylinder drives the heating plate to move towards the edge of the PVC film. The electric cylinder and the fixed plate are fixedly connected.

5. The PVC film lamination processing apparatus according to claim 4, characterized in that: The upper and lower sides of the fixed plate are threaded with screws, and the lower part of the screws is rotatably connected with an adjusting roller. The rotation of the two sets of screws drives the two sets of adjusting rollers to move towards the position of the film. The adjusting rollers are slidably connected to the inner side of the fixed plate.

6. The PVC film lamination processing apparatus according to claim 2, characterized in that: A hot air blower is installed in front of the fixed plate, and an adhesive applicator is installed in the middle of the multiple sets of driven rollers. The adhesive applicator is used to apply adhesive to the contact surfaces between the films, and the hot air blower is used to dry the adhesive after application.

7. The PVC film lamination processing apparatus according to claim 4, characterized in that: Two sets of electric cylinders are fixedly connected to the surface of the fixed plate. A connecting plate is provided between the two sets of heating plates. The electric cylinder drives the heating plates to work and also drives the connecting plate to move. The heating plates are horizontally set on the surface of the connecting plate. The connecting plate is made of a high-temperature resistant material.

8. The PVC film lamination processing apparatus according to claim 3, characterized in that: The centerline of the eccentric wheel is set towards the side closer to the PVC film surface. When the sliding block rotates, its surface will contact the inner wall of the fixed shell on the side closer to the film. The surface of the through groove inside the eccentric wheel is provided with anti-collision pads. The position where the sliding block contacts the inside of the fixed shell is set in an arc shape.

9. A PVC film lamination processing apparatus according to claim 2, characterized in that: One side of the coil spring is fixedly connected to the semi-circular shell, the transmission shaft is rotatably connected to the fixed shell, the fixed plate is fixedly connected to the shell, the transmission shaft drives the eccentric wheel to rotate inside the fixed shell, and the coil spring drives the transmission rod to reverse inside the fixed rod.

10. A PVC film lamination processing apparatus according to claim 1, characterized in that: The diameter of the semi-circular shell is larger than the diameter of the pull roller. The transmission rod passes through the inside of the fixed rod. The transmission rod has a spline on its surface inside the semi-circular shell. The transmission rod drives the pull roller to rotate through the spline. An adjustment mechanism for adjusting the distance between the two sets of hot press rollers is configured behind the traction roller.

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