A decorative film production forming process

Abstract

The application discloses a decorative film production forming treatment process and belongs to the technical field of decorative film processing. The decorative film production forming treatment process comprises the following steps: S1, feeding: raw materials are input into a feeding box above the front end of the rack of a calender, crushed by a crushing roller and heated and melted; S2, calendering: the melted raw materials enter between two horizontal calender rollers on the upper side of the front end of the rack, are extruded by the two horizontal calender rollers, form sheet films, then pass through two vertical calender rollers on the lower side in sequence, and form required decorative film sheets under the extrusion and extension of the calender rollers; the speed of the delayed cooling water backflow can be realized, meanwhile, the fan blades on the backflow pipe are driven to rotate, thereby ventilating the passing decorative films, and the combination of air cooling and water cooling is used to improve the effect of the cooling and forming of the decorative films; the cut-off excess edges can be conveyed into the feeding box to be mixed, crushed, heated and melted with the raw materials and then reused.

Description

Technical Field

[0001] This invention relates to the field of decorative film processing technology, and more specifically, to a decorative film production and molding process. Background Technology

[0002] Decorative films are mainly made of PVC. They are usually formed by calendering, which involves passing the plasticized thermoplastic close to the viscous flow temperature through a series of horizontally rotating rollers, causing the material to be squeezed and stretched to become a thin sheet product with a certain thickness, width and smooth surface.

[0003] In the production process of existing decorative films, excess burrs on both sides of the formed decorative film need to be removed to improve the quality of the decorative film. However, the existing method is to collect the excess burrs by placing collection boxes on both sides of the calender during the cutting process. The boxes on both sides require temporary space in the production area, which takes up a large area. At the same time, the excess burrs accumulate at the cutting point, which affects the cutting operation.

[0004] Existing patent (publication number: CN212218664U) discloses a decorative film trimming waste recycling device, comprising recycling pipes distributed along the width direction of the decorative film and located below the decorative film. The recycling pipes are horizontally distributed, with both ends extending beyond the sides of the decorative film. One end of the recycling pipe is equipped with a blower, and the other end of the recycling pipe is open, with the blower blowing air towards the open end of the recycling pipe. A first inlet is provided on the upper side of the end of the recycling pipe near the blower, and a second inlet is provided on the upper side of the end of the recycling pipe near the open end. The advantages of this application are: compact structure and improved recycling efficiency.

[0005] Although the decorative film trimming waste recycling device can improve the recycling efficiency, the cutting size of the waste cannot be adjusted, and the cut waste is still collected through the collection box instead of being used directly, which wastes resources. Furthermore, the collected waste needs to be processed again, which consumes labor. Summary of the Invention

[0006] 1. Technical problems to be solved

[0007] To address the problems existing in the prior art, the present invention aims to provide a decorative film production and forming process that can slow down the speed of cooling water return and drive the fan blades on the return pipe to rotate, thereby ventilating the passing decorative film. The combination of air cooling and water cooling improves the cooling and forming effect of the decorative film. The trimming mechanism can transport the trimmed excess edges to the feeding box to mix, crush, heat and melt them with the raw materials for reuse.

[0008] 2. Technical Solution

[0009] To solve the above problems, the present invention adopts the following technical solution.

[0010] A decorative film manufacturing process includes the following steps:

[0011] S1: Feeding: Input the raw material into the feed box above the front end of the calender frame, where it is crushed by the crushing rollers and heated to melt.

[0012] S2: Calendering: The molten raw material enters between two horizontal calendering rollers on the upper side of the front end of the frame. Through the squeezing action of the two horizontal calendering rollers, a sheet film is formed. Then, it passes through two vertical calendering rollers on the lower side in sequence. Under the squeezing and stretching action of the calendering rollers, the desired decorative film sheet is formed.

[0013] S3: Cooling: The thin decorative film passes between the cooling rollers on the front side of the horizontal part of the frame, and the decorative film is cooled and shaped by the cooling action of the cooling rollers.

[0014] S4: Edge trimming: The cooled and shaped decorative film sheet is conveyed to the space between two conveyor rollers at the rear of the frame. The excess edges on the left and right sides of the decorative film can be cut off by the cutting action of the edge trimming mechanism. The cut excess edges will be conveyed to the feed box again to mix with the raw materials, and then crushed, heated and melted by the crushing rollers for reuse.

[0015] Furthermore, the calender in step S1 includes a frame, calendering rolls, cooling rolls, conveying rolls and pressure rolls. A base plate is fixedly connected to the bottom of the frame. There are four calendering rolls, and the four calendering rolls are L-shaped and rotatably connected to the inside of the L-shaped frame at the front end of the frame. Several cooling rolls are symmetrically rotatably connected to the front side of the horizontal part of the frame.

[0016] Two conveyor rollers are rotatably connected to the rear side of the frame at the same level as the lower cooling roller, and a trimming mechanism is provided between the two conveyor rollers. Two pressure rollers are rotatably connected to the inner side of the frame above the conveyor rollers.

[0017] Furthermore, in step S1, the feed box is located above the L-shaped frame at the front end of the machine frame, and the front and rear sides of the feed box are fixedly connected to the machine frame through support plates. The lower end of the feed box has a funnel-shaped discharge port aligned with the gap between the two horizontal calendering rollers.

[0018] Furthermore, two crushing rollers are symmetrically connected to the inner walls of the feed box, and each crushing roller has a spiral heating wire embedded inside near its outer edge.

[0019] Furthermore, the cooling roller has a cylindrical cavity structure inside, and the roller shafts on both the left and right sides of the cooling roller are provided with water inlet holes that penetrate into the inside. The roller shafts on the left and right sides of the cooling roller respectively penetrate into the left and right sides of the frame and are rotatably connected to rotary joints.

[0020] A U-shaped water tank is placed on the bottom plate below the lower cooling roller, and a water pump is fixedly connected inside the left side of the tank. The upper end of the water pump's water delivery pipe extends to a position flush with the rotary joint and is connected to a water collection pipe. The right side of the water collection pipe is connected to several branch pipes corresponding to the rotary joint. The branch pipes are respectively connected to the rotary joint on the left side of the upper cooling roller.

[0021] The left side of the lower cooling roller is connected to a return pipe, and the opening of the return pipe extends into the tank on the right side of the water tank. The rotary joint on the right side of the upper cooling roller and the rotary joint on the lower cooling roller are connected by a connecting pipe.

[0022] Furthermore, the portion of the return pipe located below the cooling roller on the lower side is in a horizontal state, and each return pipe is rotatably connected to a rotating shaft, the lower end of which penetrates into the interior of the return pipe and is fixedly connected to an impeller;

[0023] The rotating shaft is fitted with a collar on its annular outer surface above the return pipe, and the lower end of the collar is fixedly connected to the return pipe. The upper end of the rotating shaft is fixedly connected with fan blades.

[0024] Furthermore, the cutting mechanism includes a horizontal plate, which is symmetrically arranged between the frame and the water tank. An L-shaped blade holder is symmetrically fixedly connected to the inner side of the right end of the horizontal plate, and a cutter is fixedly connected to the upper end of each blade holder. The cutter is located between two conveying rollers.

[0025] The lower end of the horizontal plate is fixedly connected to sliders at both the front and rear ends, and the upper end of the bottom is provided with a groove for the sliders to slide.

[0026] The horizontal plate located at the water tank position has three support rods that run horizontally and equidistantly through it, and the left and right ends of the support rods are fixedly connected to the inner side wall of the water tank.

[0027] Furthermore, each of the upper and lower ends of the horizontal plate is fixedly connected to an L-shaped vertical plate. The vertical plate is symmetrically connected to the left and right sides of the front side of the L-shaped frame at the front end of the machine frame, and a limiting plate is fixedly connected to the front side of the L-shaped frame at the front end of the machine frame. The front side of the limiting plate is provided with a limiting groove that matches the limiting block. Several sets of guide rollers are symmetrically and equidistantly rotatably connected to the inner sides of the horizontal plate and the vertical plate.

[0028] Furthermore, the horizontal portion of the vertical plate extends above the feed box, and an active roller is rotatably connected to the upper front side of the inner side of the horizontal portion of the vertical plate, a driven roller is rotatably connected below the active roller, a cutting roller is rotatably connected to the rear side of the active roller, and a fixed roller is fixedly connected below the cutting roller.

[0029] The roller shaft of the driving roller extends through the outside of the vertical plate and is fixedly connected to the main gear. The roller shaft of the driven roller extends through the rear side of the vertical plate and is fixedly connected to the first auxiliary gear, which meshes with the main gear. The vertical plate above the main gear is fixedly connected to the second motor via a hanging plate. The output shaft of the second motor is fixedly connected to the center position of the outer side of the main gear.

[0030] The roller shaft of the cutting roller extends through the outside of the vertical plate and is fixedly connected to a second auxiliary gear, which meshes with the main gear. Cutting strips are fixedly connected to the annular outer surface of the cutting roller.

[0031] Furthermore, a first motor is fixedly connected to the center of the upper surface of the bottom plate below the inner side of the front end of the cross plate. An adjusting gear is fixedly connected to the output shaft of the first motor. Two toothed plates are symmetrically meshed on the front and rear sides of the adjusting gear. The toothed plates are fixedly connected to the lower ends of the inner sides of the two cross plates respectively.

[0032] 3. Beneficial Effects

[0033] Compared with the prior art, the advantages of this invention are:

[0034] 1. This solution involves installing an impeller inside the return pipe, which causes the cooling water to impact the impeller during return flow. This increases the water resistance and slows down the speed at which the return pipe enters the water tank, thereby increasing the heat exchange effect between the cooled water that has absorbed heat and the air, thus achieving the effect of cooling the cooling water.

[0035] 2. In this design, the impeller rotation will drive the shaft to rotate, which in turn drives the fan blades to rotate. The cold air generated by the fan blades is blown upward, thereby improving the heat exchange effect between the decorative film and the outside air. Combined with the cooling water circulating in the cooling water roller, the cooling and forming effect of the decorative film is improved.

[0036] 3. This solution involves installing support rods on the inner wall of the water tank, with a horizontal plate slidingly mounted on the support rods. Slider blocks are fixedly connected to the front and rear sides of the lower end of the horizontal plate. A sliding groove for the sliders is opened on the bottom plate. A limiting block is fixedly connected to the vertical plate, and a limiting plate is fixedly connected to the frame. The limiting plate has a limiting groove that matches the limiting block. This ensures that the horizontal and vertical plates do not wobble during the process of the first motor driving the adjusting gear to adjust the distance between the cutters, thereby improving the cutting effect.

[0037] 4. The excess material cut off by this method is conveyed to the top of the feed box by the guide roller, and then the cutting roller drives the cutting strip to rotate, so that the cutting strip can cut the decorative film once for each rotation. Cutting the decorative film makes it easier for the crushing roller to crush and heat and melt it. Attached Figure Description

[0038] Figure 1 This is a perspective view of the overall structure of the present invention;

[0039] Figure 2 This is a perspective view of the position of the cutting mechanism of the present invention;

[0040] Figure 3 This is a perspective view of the location of the reflux pipe in this invention;

[0041] Figure 4 This is a perspective view of the edge-cutting mechanism of the present invention;

[0042] Figure 5 This is a perspective view of the cooling roller of the present invention;

[0043] Figure 6 For the present invention Figure 1 Cross-sectional view at point AA;

[0044] Figure 7 For the present invention Figure 6 Enlarged view of point B in the image;

[0045] Figure 8 This is a process flow diagram of the present invention.

[0046] Explanation of the labels in the diagram:

[0047] 1. Base plate; 2. Calender; 21. Calender roll; 22. Cooling roll; 23. Pressure roll; 24. Conveyor roll; 25. Frame; 3. Feed box; 31. Crushing roll; 4. Water tank; 41. Water pump; 42. Water supply pipe; 43. Water collection pipe; 44. Diverter pipe; 45. Rotary joint; 46. Return pipe; 47. Fan blade; 471. Shaft; 472. Collar; 473. Impeller; 48. Connecting pipe; 5. Support plate; 6. Edge trimming mechanism; 61. Horizontal plate; 611. Knife holder; 612. Cutter; 613. Slider; 614. Groove; 615. Support rod; 62. Guide roller; 63. Adjusting gear; 631. First motor; 632. Toothed plate; 64. Vertical plate; 641. Limiting block; 642. Limiting plate; 643. Limiting groove; 65. Second motor; 651. Main gear; 652. Driven roller; 653. First auxiliary gear; 654. Driven roller; 655. Second auxiliary gear; 656. Cutting roller; 657. Cutting strip; 658. Fixed roller. Detailed Implementation

[0048] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0049] Example 1:

[0050] Please see Figure 1-8 A decorative film manufacturing process includes the following steps:

[0051] S1: Feeding: The raw material is fed into the feed box 3 above the front end of the frame 25 of the calender 2, and is crushed and heated by the crushing roller 31;

[0052] S2: Calendering: The melted raw material enters between two horizontal calendering rollers 21 on the upper side of the front end of the frame 25. Through the squeezing action of the two horizontal calendering rollers 21, a sheet film is formed. Then, it passes through the two vertical calendering rollers 21 on the lower side in sequence. Under the squeezing and stretching action of the calendering rollers 21, the desired decorative film sheet is formed.

[0053] S3: Cooling: The thin decorative film passes between the cooling rollers 22 on the front side of the horizontal part of the frame 25, and the decorative film is cooled and shaped by the cooling action of the cooling rollers 22.

[0054] S4: Edge cutting: The cooled and shaped decorative film sheet is conveyed to the space between the two conveying rollers 24 on the back side of the frame 25. The excess edges on the left and right sides of the decorative film can be cut off by the cutting action of the edge cutting mechanism 6. The cut excess edges will be conveyed to the feed box 3 again to mix with the raw materials, and then crushed, heated and melted by the crushing roller 31 for reuse.

[0055] The calender 2 mentioned in step S1 includes a frame 25, calendering rolls 21, cooling rolls 22, conveyor rolls 24, and pressure rolls 23. A base plate 1 is fixedly connected to the bottom of the frame 25. There are four calendering rolls 21, and the four calendering rolls 21 are rotatably connected to the inside of the L-shaped frame at the front end of the frame 25 in an L-shape. Several cooling rolls 22 are symmetrically rotatably connected to the front side of the horizontal part of the frame 25. Two conveyor rolls 24 are rotatably connected to the rear side of the frame 25 at the same level as the lower cooling rolls 22, and a trimming mechanism 6 is provided between the two conveyor rolls 24. Two pressure rolls 23 are rotatably connected to the inside of the frame 25 above the conveyor rolls 24.

[0056] In step S1, the feed box 3 is located above the L-shaped frame at the front end of the frame 25, and the front and rear sides of the feed box 3 are fixedly connected to the frame 25 through the support plate 5. The lower end of the feed box 3 is funnel-shaped and aligned with the gap between the two horizontal calendering rollers 21. Two crushing rollers 31 are symmetrically rotated and connected to the left and right inner walls of the feed box 3. The crushing rollers 31 are embedded with spiral heating wires near the outer edge.

[0057] After the raw material is fed into the feed box 3, the two crushing rollers 31 are started to rotate in opposite directions to crush the raw material. At the same time, the raw material is melted by the electric heating wire inside the crushing rollers 31. The melted raw material falls between the two horizontal calendering rollers 21 above the frame 25. As the two horizontal calendering rollers 21 rotate in opposite directions, the melted raw material is squeezed into a sheet film, which then passes through the two vertical calendering rollers 21 below in sequence. Under the squeezing and stretching action of the calendering rollers 21, the desired decorative film sheet is formed. The thin decorative film passes between the cooling rollers 22 on the front side of the horizontal section of the frame 25. The cooling rollers 22 cool and shape the decorative film. After being shaped, the decorative film is cut by the cutting mechanism 6 under the action of the front conveyor roller 24 and then transferred to the rear conveyor roller 24. The pressure roller 23 on the front conveyor roller 24 limits the decorative film that has not been cut to prevent it from arching during the cutting process. The rear pressure roller 23 limits the decorative film after the cutting to prevent it from wrinkling and facilitates subsequent winding.

[0058] As one embodiment of the present invention, refer to Figure 2 , Figure 3 , Figure 5 , Figure 6 and Figure 7 The cooling roller 22 has a cylindrical cavity structure inside, and the roller shafts on both the left and right sides of the cooling roller 22 are provided with water inlet holes that penetrate into the interior. The roller shafts on the left and right sides of the cooling roller 22 respectively penetrate into the left and right sides of the frame 25 and are rotatably connected to the rotary joints 45. A U-shaped water tank 4 is placed on the bottom plate 1 below the lower cooling roller 22, and a water pump 41 is fixedly connected inside the left side of the water tank 4. The upper end of the water delivery pipe 42 of the water pump 41 extends to a position flush with the rotary joints 45 and is connected to a water collection pipe 4. 3. The right side of the water collection pipe 43 is connected to a plurality of diversion pipes 44 corresponding to the rotary joint 45. The diversion pipes 44 are respectively connected to the rotary joint 45 on the left side of the upper cooling roller 22. The left side of the lower cooling roller 22 is respectively connected to a return pipe 46, and the opening of the return pipe 46 extends into the box body on the right side of the water tank 4. The rotary joint 45 on the right side of the upper cooling roller 22 and the rotary joint 45 on the lower cooling roller 22 are respectively connected by a connecting pipe 48.

[0059] The portion of the return pipe 46 located below the cooling roller 22 is horizontal, and each return pipe 46 is rotatably connected to a rotating shaft 471. The lower end of the rotating shaft 471 extends into the interior of the return pipe 46 and is fixedly connected to an impeller 473. A collar 472 is fitted on the annular outer surface of the rotating shaft 471 above the return pipe 46, and the lower end of the collar 472 is fixedly connected to the return pipe 46. Fan blades 47 are fixedly connected to the upper end of the rotating shaft 471.

[0060] Specifically, the decorative film passing through the calendering roller 21 enters between the upper and lower cooling rollers 22 on the front side of the frame 25. At this time, the water pump 41 is started to input the cooling water in the water tank 4 into the water collection pipe 43 through the water supply pipe 42, and then into the upper cooling roller 22 through the diversion pipe 44. After passing through the upper cooling roller 22, it enters the lower cooling roller 22 through the connecting pipe 48. The cooperation of the upper and lower cooling rollers 22 improves the cooling and forming effect of the decorative film. The cooling water after passing through the lower cooling roller 22 flows back to the water tank 4 through the return pipe 46. Since the rotating shaft 471 passes through the inside of the return pipe 46 and is fixedly connected to the impeller 473, the cooling water is blocked when passing through the impeller 473, thereby prolonging the speed of the cooling water flowing back to the water tank 4. The cooling water flowing back to the water tank 4 will be pumped back into the cooling roller 22 to form circulating water to improve the cooling effect.

[0061] As the cooling water flows through the cooling roller 22, it absorbs the heat dissipated by the decorative film, thus causing the water to heat up as well. Extending the speed at which the cooling water flows back to the water tank 4 increases its heat exchange with the outside air, thereby cooling the water and ensuring its continuous heat absorption capacity. Since the rotating shaft 471 is rotatably connected to the return pipe 46, the rotation of the impeller 473 can drive the rotating shaft 471 to rotate, which in turn drives the fan blades 47 to rotate and generate upward cold air. The decorative film passing through is blown by the cold air, and at the same time, the cooling water in the cooling roller 22 absorbs heat, further improving the cooling and shaping effect.

[0062] As one embodiment of the present invention, refer to Figure 1 , Figure 2 , Figure 4 and Figure 5 The cutting mechanism 6 includes a horizontal plate 61, which is symmetrically arranged between the frame 25 and the water tank 4. An L-shaped knife holder 611 is symmetrically fixedly connected to the inner side of the right end of the horizontal plate 61, and a cutter 612 is fixedly connected to the upper end of each knife holder 611. The cutter 612 is located between two conveying rollers 24. A slider 613 is fixedly connected to both the front and rear ends of the lower end of the horizontal plate 61, and a groove 614 for the slider 613 to slide is correspondingly opened on the upper end of the bottom. Three support rods 615 are horizontally and equidistantly passed through the part of the horizontal plate 61 located at the position of the water tank 4, and the left and right ends of the support rods 615 are fixedly connected to the inner side wall of the water tank 4 respectively.

[0063] The upper end face and rear end of the horizontal plate 61 are fixedly connected to the vertical plate 64 with an L-shaped structure. The vertical plate 64 is located on the front side of the L-shaped frame at the front end of the machine frame 25 and is symmetrically connected to the limiting block 641. The front side of the L-shaped frame at the front end of the machine frame 25 is fixedly connected to the limiting plate 642. The front side of the limiting plate 642 is provided with a limiting groove 643 that matches the limiting block 641. Several sets of guide rollers 62 are symmetrically and equidistantly rotatably connected to the inner sides of the horizontal plate 61 and the vertical plate 64 respectively.

[0064] The horizontal portion of the vertical plate 64 extends above the feed box 3, and a drive roller 652 is rotatably connected to the upper front side of the inner side of the horizontal portion of the vertical plate 64. A driven roller 654 is rotatably connected below the drive roller 652. A cutting roller 656 is rotatably connected to the rear side of the drive roller 652. A fixed roller 658 is fixedly connected below the cutting roller 656. The roller shaft of the drive roller 652 extends through to the outside of the vertical plate 64 and is fixedly connected to a main gear 651. The rear side of the roller shaft of the driven roller 654 extends through to the outside of the vertical plate 64 and is fixedly connected to a main gear 651. A first auxiliary gear 653 is fixedly connected to the main gear 651, and the first auxiliary gear 653 meshes with the main gear 651. A second motor 65 is fixedly connected to the vertical plate 64 above the main gear 651 via a hanging plate. The output shaft of the second motor 65 is fixedly connected to the center position of the outer side of the main gear 651. The roller shaft of the cutting roller 656 passes through the outside of the vertical plate 64 and is fixedly connected to the second auxiliary gear 655, and the second auxiliary gear 655 meshes with the main gear 651. A cutting strip 657 is fixedly connected to the annular outer surface of the cutting roller 656.

[0065] A first motor 631 is fixedly connected to the center of the upper surface of the bottom plate 1 below the inner side of the front end of the horizontal plate 61. An adjusting gear 63 is fixedly connected to the output shaft of the first motor 631. Two toothed plates 632 are symmetrically meshed on the front and rear sides of the adjusting gear 63. The toothed plates 632 are fixedly connected to the lower ends of the inner sides of the two horizontal plates 61 respectively.

[0066] Specifically, depending on the roughness of the remaining edges after the decorative film is formed, the first motor 631 is started to drive the adjusting gear 63 to rotate counterclockwise, thereby causing the two toothed plates 632 to move closer together, and then causing the two horizontal plates 61 to move closer together, so that the cutters 612 on the blade holder 611 at the rear end of the horizontal plate 61 move closer together to match the remaining edges of the decorative film. Three support rods 615 are fixedly connected horizontally and equidistantly on the inner wall of the water tank 4. The horizontal plate 61 is slidably sleeved on the support rods 615. Sliding blocks 61 are fixedly connected to the front and rear sides of the lower end face of the horizontal plate 61. 3. A sliding groove 614 for sliding slider 613 is provided on the base plate 1. A limiting block 641 is fixedly connected to the vertical plate 64, and a limiting plate 642 is fixedly connected to the frame 25. A limiting groove 643 matching the limiting block 641 is provided on the limiting plate 642. This ensures that the horizontal plate 61 and the vertical plate 64 will not shake when they move closer to each other along the sliding groove 614, under the combined action of the limiting block 641 and the support rod 615. This also improves the load-bearing capacity of the horizontal plate 61 and the vertical plate 64, thereby improving the cutting effect.

[0067] The initially cut edge is first manually guided between the two guide rollers 62 at the rear of the horizontal plate 61 below the cutter holder 611. As the horizontal plate 61 is horizontally pulled to the two guide rollers 62 at its front end, the cut edge is then vertically guided upwards to the double-layer feed rollers 62 on the inner side of the vertical plate 64. Finally, the cut edge is guided to the driving roller 652 and driven roller 654 on the inner side of the horizontal portion of the vertical plate 64 above the feed box 1. The second motor 65 is then started, and the electric main gear 651 rotates counterclockwise. Since both the first and second auxiliary gears 653 and 655 mesh with the main gear 651, the driving roller 652 rotates counterclockwise, and the driven roller 654 rotates clockwise, thus... The excess edge is continuously conveyed upwards. When the excess edge is conveyed to the fixed roller 658, the cutting roller 656 rotates clockwise under the drive of the second gear 655. Since the cutting strip 657 is fixedly connected to the annular outer surface of the cutting roller 656, the cutting strip 657 can cut the excess edge of the decorative film once every rotation. The cut excess edge continuously falls into the feed box 3 and mixes with the raw material. After being crushed and heated by the crushing roller 31, it is re-formed into a decorative film sheet. The size of the excess edge can be adjusted, and the cut excess edge can be immediately returned to the feed box 3 for reuse, avoiding the need for manual cleaning, saving labor costs, improving the utilization rate of raw materials, and increasing output.

[0068] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concepts, should be covered within the scope of protection of the present invention.

Claims

1. A decorative film manufacturing and molding process, characterized in that: Includes the following steps: S1: Feeding: Input the raw material into the feed box (3) above the front end of the frame (25) of the calender (2), and it will be crushed and heated by the crushing roller (31); S2: Calendering: The melted raw material enters between two horizontal calendering rollers (21) on the upper side of the front end of the frame (25). It is formed into a sheet film by the squeezing action of the two horizontal calendering rollers (21). Then it passes through the two vertical calendering rollers (21) on the lower side in sequence. Under the squeezing and stretching action of the calendering rollers (21), the desired decorative film sheet is formed. S3: Cooling: The decorative film, which is formed into a thin sheet, passes between the cooling rollers (22) on the front side of the horizontal part of the frame (25). The cooling action of the cooling rollers (22) cools and shapes the decorative film. S4: Edge cutting: The cooled and shaped decorative film sheet is conveyed to the two conveying rollers (24) on the back side of the frame (25). The excess edges on the left and right sides of the decorative film can be cut off by the cutting action of the edge cutting mechanism (6). The cut excess edges will be conveyed to the feed box (3) again to be mixed with the raw materials and then crushed, heated and melted by the crushing roller (31) for reuse. In step S1, the feed box (3) is located above the L-shaped frame at the front end of the frame (25), and the feed box (3) is fixedly connected to the frame (25) on both the front and rear sides through the support plate (5). The lower end of the feed box (3) is funnel-shaped and aligned with the gap between the two horizontal calendering rollers (21). The calender (2) mentioned in step S1 includes a frame (25), calendering rolls (21), cooling rolls (22), conveying rolls (24) and pressure rolls (23). A base plate (1) is fixedly connected to the bottom of the frame (25). There are four calendering rolls (21), and the four calendering rolls (21) are L-shaped and rotatably connected to the inside of the L-shaped frame at the front end of the frame (25). The front side of the horizontal part of the frame (25) is symmetrically connected with several cooling rollers (22). The frame (25) has two conveyor rollers (24) rotatably connected to the rear side of the lower cooling roller (22) at the same level, and a cutting mechanism (6) is provided between the two conveyor rollers (24). Two pressure rollers (23) are rotatably connected to the inner side of the frame (25) above the conveyor roller (24); The feed box (3) has two crushing rollers (31) symmetrically connected to the inner walls of the left and right sides, and the crushing rollers (31) are all embedded with a spiral heating wire near the outer edge. The cooling roller (22) has a cylindrical cavity structure inside, and the roller shafts on the left and right sides of the cooling roller (22) are provided with water inlet holes that penetrate into the interior. The roller shafts on the left and right sides of the cooling roller (22) respectively penetrate into the left and right sides of the frame (25) and are rotatably connected to the rotary joints (45). A U-shaped water tank (4) is placed on the bottom plate (1) below the lower cooling roller (22), and a water pump (41) is fixedly connected inside the left side of the water tank (4). The upper end of the water delivery pipe (42) of the water pump (41) extends to the same position as the rotary joint (45) and is connected to a water collection pipe (43). The right side of the water collection pipe (43) is connected to a number of branch pipes (44) corresponding to the rotary joint (45). The branch pipes (44) are respectively connected to the rotary joint (45) on the left side of the upper cooling roller (22). The left side of the cooling roller (22) on the lower side is connected to a return pipe (46), and the opening of the return pipe (46) extends to the inside of the tank on the right side of the water tank (4). The rotary joint (45) on the right side of the cooling roller (22) on the upper side and the rotary joint (45) on the cooling roller (22) on the lower side are connected by a connecting pipe (48). The portion of the return pipe (46) located below the cooling roller (22) on the lower side is in a horizontal state, and each return pipe (46) is rotatably connected to a rotating shaft (471). The lower end of the rotating shaft (471) extends into the interior of the return pipe (46) and is fixedly connected to an impeller (473). The rotating shaft (471) is fitted with a collar (472) on the annular outer surface above the return pipe (46), and the lower end of the collar (472) is fixedly connected to the return pipe (46). The upper end of the rotating shaft (471) is fixedly connected with a fan blade (47).

2. The decorative film production and molding process according to claim 1, characterized in that: The cutting mechanism (6) includes a horizontal plate (61), which is symmetrically arranged between the frame (25) and the water tank (4). The right inner side of the horizontal plate (61) is symmetrically fixedly connected with an L-shaped knife holder (611), and a cutter (612) is fixedly connected to the upper end of the knife holder (611). The cutter (612) is located between two conveying rollers (24). The horizontal plate (61) has sliders (613) fixedly connected to both the front and rear ends of the lower end face, and a groove (614) for the sliders (613) to slide is opened on the upper end face of the bottom. The horizontal plate (61) located at the position of the water tank (4) has three support rods (615) that are horizontally equidistantly inserted, and the left and right ends of the support rods (615) are fixedly connected to the inner side wall of the water tank (4) respectively.

3. The decorative film production and molding process according to claim 2, characterized in that: The upper end face of the horizontal plate (61) is fixedly connected to the rear end of the vertical plate (64) with an L-shaped structure. The vertical plate (64) is located on the front side of the L-shaped frame at the front end of the machine frame (25) and is symmetrically connected to the limiting block (641). The front side of the L-shaped frame at the front end of the machine frame (25) is fixedly connected to the limiting plate (642). The front side of the limiting plate (642) is provided with a limiting groove (643) that matches the limiting block (641). Several sets of guide rollers (62) are symmetrically and equidistantly connected to the inner sides of the horizontal plate (61) and the vertical plate (64).

4. The decorative film production and molding process according to claim 3, characterized in that: The horizontal portion of the vertical plate (64) extends above the feed box (3), and an active roller (652) is rotatably connected to the upper front side of the inner side of the horizontal portion of the vertical plate (64). A driven roller (654) is rotatably connected below the active roller (652), a cutting roller (656) is rotatably connected to the rear side of the active roller (652), and a fixed roller (658) is fixedly connected below the cutting roller (656). The roller shaft of the driving roller (652) extends through the outside of the vertical plate (64) and is fixedly connected to the main gear (651). The roller shaft of the driven roller (654) extends through the rear side of the vertical plate (64) and is fixedly connected to the first auxiliary gear (653). The first auxiliary gear (653) meshes with the main gear (651). The vertical plate (64) above the main gear (651) is fixedly connected to the second motor (65) through a hanging plate. The output shaft of the second motor (65) is fixedly connected to the center position of the outer side of the main gear (651). The roller shaft of the cutting roller (656) extends through the outside of the vertical plate (64) and is fixedly connected to a second auxiliary gear (655), and the second auxiliary gear (655) meshes with the main gear (651). Cutting strips (657) are fixedly connected to the annular outer surface of the cutting roller (656).

5. The decorative film production and molding process according to claim 4, characterized in that: A first motor (631) is fixedly connected to the center of the upper end face of the bottom plate (1) below the inner side of the front end of the horizontal plate (61). An adjusting gear (63) is fixedly connected to the output shaft of the first motor (631). Two toothed plates (632) are symmetrically meshed on the front and rear sides of the adjusting gear (63). The toothed plates (632) are fixedly connected to the lower end of the inner side of the two horizontal plates (61) respectively.

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