PVC film precision calender forming equipment and forming process

Abstract

The application discloses PVC film precision calendering forming equipment and belongs to the technical field of PVC film forming equipment, which comprises a machine body, a first conveying roller and a second conveying roller arranged above the machine body for conveying transmission, a positioning frame is screw-mounted on the machine body, two moving blocks are slidingly installed in the positioning frame, and the opposite sides of the two moving blocks are sealingly connected with cooling rollers for heat exchange and cooling, and cleaning discs are slidingly installed in the cooling rollers. The PVC film precision calendering forming equipment is provided with the cleaning discs, can drive the first water wheel outer end connecting reciprocating lead screws to rotate through the potential energy of water source conveying at the same time, and can drive the cleaning discs to reciprocatingly move in the cooling rollers through the reciprocatingly moving reciprocating lead screws, so that the cleaning discs can reciprocatingly clean and scrape the water source impurities adhered to the inner walls of the cooling rollers, and the phenomenon of blockage caused by the impurities adhered to the inner walls of the cooling rollers is avoided.

Description

Technical Field

[0001] This invention relates to the field of PVC film forming equipment technology, specifically to a precision calendering and forming equipment and process for PVC film. Background Technology

[0002] Precision calendering equipment for PVC film is a specialized machine used to produce high-precision PVC films. It processes PVC raw materials into films with specific thicknesses, widths, and surface qualities through a calendering process. These films are widely used in packaging materials, building materials, and electronics. During the precision calendering process of PVC film, an independent cooling mechanism is generally required to cool the formed PVC film. However, existing cooling mechanisms are mainly based on air cooling or a single air-blowing method for heat dissipation. This cooling method is very simplistic and has poor cooling effect, which affects the subsequent forming efficiency of the PVC film.

[0003] To overcome the above-mentioned defects, in existing technology 1 (Chinese patent application number CN202420965446.7, application date 2024-05-07), a PVC film processing cooling equipment uses a blowing device to deliver cooling air for auxiliary cooling. Compared with traditional natural cooling and single air cooling, this improves the cooling effect and efficiency, thereby enabling more uniform heat dissipation and cooling of the PVC film during PVC film processing, improving heat dissipation efficiency, and enhancing the final molding effect and basic quality of the product. Furthermore, in existing technology 2 (Chinese patent application number CN201910667624.1, application date 2019-07-23), a PVC film production humidification equipment uses a blowing device to deliver cooling air to assist in the cooling process. This improves the cooling effect and efficiency compared to traditional natural cooling and single air cooling, thus enabling more uniform heat dissipation and cooling of the PVC film during processing, and enhancing the final molding effect and basic quality of the product. When the solution decreases, the liquid tank inside the cylindrical support rod will slowly wet the coating part through the fine holes, thereby replenishing the solution so that the coating part can effectively cool the PVC film. In the prior art 3 (Chinese patent application number CN202022095121.2, application date 2020-09-22), a PVC material film processing and forming equipment, the water in the water tank is cooled by the refrigerator inside the roller, and then transported to the cooling pipe by the submersible pump. The heat is transferred to the cooling roller through the cooling pipe, thereby cooling the film. This solves the problem that the existing film processing device has a slow cooling rate and uneven cooling when cooling the film, which affects the film production quality.

[0004] While existing technologies can cool the formed PVC film and improve its processing efficiency, water cooling can lead to uneven heat dissipation, resulting in poor cooling efficiency of the cooling rollers and prolonged cooling time. Therefore, this technology is proposed to solve the aforementioned problems. Summary of the Invention

[0005] The purpose of this invention is to provide a precision calendering and molding equipment and molding process for PVC film, in order to solve the problem mentioned in the background art that the current precision calendering and molding equipment for PVC film on the market has poor cooling efficiency of the cooling roller due to the inability to achieve uniform heat dissipation while cooling the PVC film by water cooling, which prolongs the cooling time of the PVC film and makes it less practical.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a PVC film precision calendering molding equipment and molding process, comprising a machine body, and a first conveying roller and a second conveying roller disposed above the machine body for conveying and transmission. An mounting plate is also provided above the machine body, and a first extrusion roller and a second extrusion roller are rotatably mounted on the inner side of the mounting plate. A servo motor is connected to the right end of the first extrusion roller. A take-up roller is also provided above the machine body, and a cooling roller is correspondingly located on the outer side of the take-up roller. A positioning frame is screwed onto the upper part of the machine body, and two moving blocks are slidably mounted inside the positioning frame. A cooling roller for heat exchange and cooling is sealed to the opposing surfaces of the two moving blocks. Water pipes are connected to both ends of the cooling roller, and a treatment water tank is sealed to the lower part of the two water pipes via a water pump. The treatment water tank is screwed onto the lower part of the machine body. A cleaning disc is slidably mounted inside the cooling roller, and the outer wall of the cleaning disc is fitted to the inner wall of the cooling roller.

[0007] Preferably, the cooling roller is internally positioned with two mounting brackets, and a reciprocating screw is rotatably mounted inside the two mounting brackets. A first water wheel is mounted on the left end of the reciprocating screw, and a cleaning disc is threaded through the outer side of the reciprocating screw.

[0008] Preferably, the first water wheel is disposed inside the cooling roller, and the diameter of the cooling roller is larger than the diameter of the first water wheel, and the first water wheel corresponds to the water inlet position of the cooling roller.

[0009] Preferably, a second water wheel is rotatably mounted on the left side of the cleaning disc, and the outer side of the second water wheel corresponds to the water inlet position of the cooling roller, and the second water wheel is set at an equal angle.

[0010] Preferably, the front ends of the first extrusion roller and the second extrusion roller are respectively provided with a drive gear and a rotating gear, and the drive gear and the rotating gear are meshed with each other. The output end of the drive gear is connected to one end of a transmission belt, and the other end of the transmission belt is connected to the output end of a half gear.

[0011] Preferably, the half gear is rotatably mounted inside the positioning frame, and a driven gear is meshed with the outer side of the half gear, wherein the driven gear is rotatably mounted inside the positioning frame.

[0012] Preferably, a pressing rod is installed at the front end of the driven gear, and the pressing rod has a corresponding moving block, and the pressing rod is in the shape of an "L".

[0013] Preferably, the positioning frame has one end of two compression springs connected inside, and the two compression springs have the same structure, and the other end of the two compression springs is connected to a moving block.

[0014] Preferably, a filter plate is installed inside the treatment tank, and a force-bearing block is installed above the filter plate. A beater block is correspondingly installed above the force-bearing block. A movable disc is rotatably installed inside the treatment tank, and a ring of water receiving plates is evenly spaced on the outer surface of the movable disc. The ring of water receiving plates is inclined, and a beater block is installed on the outer side of each ring of water receiving plates. The beater block and the force-bearing block form a beater structure.

[0015] Preferably, the specific method and steps are as follows:

[0016] S1. Calendering: The PVC film is extruded and formed by a calender, and then the formed PVC film is extruded and conveyed by the first conveying roller, the second conveying roller, the first extrusion roller and the second extrusion roller.

[0017] S2. Cooling and shaping: The conveyed PVC film is cooled and shaped by the cooling rollers to avoid insufficient cooling, which can cause the PVC film to become sticky or wrinkled.

[0018] S3. Impurity Removal Cooling: The impurity removal mechanism cleans the water impurities adhering to the inner wall of the cooling roller by reciprocating movement. A second water wheel can also be set to accelerate the water flow, thereby improving heat transfer efficiency, avoiding the formation of temperature gradients in areas close to the heat source, and improving the uniform cooling efficiency of the PVC film.

[0019] S4. Screening and filtration waste heat recovery: The set filtration mechanism screens and filters the cooling water after impurity removal and cleaning. The filtered water can then be transported to the calendering rolls for hot pressing through a conveying pipe to recover and reuse waste heat, thereby reducing the energy consumption of the cooling system.

[0020] S5. Rewinding and storage: The cooled and formed PVC film is rewound using a set rewinding roller.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] (1) A cleaning disc is provided. A reciprocating screw is rotatably installed inside the cooling roller via a mounting frame. A first water wheel is connected to the left end of the reciprocating screw. While water is being transported, the potential energy of the water wheel drives the reciprocating screw connected to the outer end of the first water wheel to rotate. At the same time, the rotating reciprocating screw drives the cleaning disc to move back and forth inside the cooling roller. The reciprocating movement of the cleaning disc drives the water impurities adhering to the inner wall of the cooling roller to clean and scrape them back and forth, preventing impurities from sticking to the inner wall of the cooling roller and causing blockage. This improves the flowability of the cooling roller and makes it more practical.

[0023] (2) Furthermore, a second water wheel is installed on the outside of the cleaning plate, and there is a water inlet on the outside of the second water wheel. When the water source is transported, the potential energy of the flow can drive the second water wheel to rotate. At this time, the rotating second water wheel will accelerate the flow of water source, thereby improving the heat transfer efficiency, avoiding the formation of temperature gradient in the area near the heat source, and improving the cooling uniformity efficiency of PVC film.

[0024] (3) A movable block is provided. A positioning frame is installed on the top of the machine body by screws. A cooling roller is slidably installed on the top of the positioning frame by the movable block. While the PVC film is actually being rolled up, the two movable blocks can be moved to drive the cooling roller to move back and forth to cool the PVC film. This improves the cooling range of the cooling roller, reduces the boundary layer thermal resistance, enhances the convective heat transfer efficiency, and makes it more practical.

[0025] (4) Furthermore, while the first extrusion roller and the second extrusion roller are extruding and conveying the PVC film after molding, the transmission belt connected to the output end of the drive gear will simultaneously drive the half gear to rotate inside the positioning frame. Because the half gear is meshed with the driven gear on the outside, it can drive the extrusion rod to extrude the moving block through the extrusion spring to move back and forth while the half gear is rotating, thereby expanding the cooling range of the cooling roller. It eliminates the need for complicated manual operation steps and is more practical.

[0026] (5) Equipped with a filter plate, when the heat-exchanged water source is transported to the inside of the treatment tank through the water conveying pipe, the potential energy of the water flow will simultaneously squeeze a ring of water receiving plates, causing the movable disc to rotate inside the treatment tank. At this time, the rotating ring of water receiving plates will drive a ring of striking blocks to strike and vibrate the force-bearing blocks set above the filter plate in sequence. The vibration force of the striking can vibrate and treat the water source impurities adhering to the surface of the filter plate, preventing the water source impurities from adhering to the surface of the filter plate and affecting the subsequent filtration and screening process. Not only can the filtered water source be transported to the cooling roller for cooling and temperature reduction through the water conveying pipe, but the heat-exchanged water source can also be transported to the calendering roller for hot pressing to realize the recovery and use of waste heat, reduce the energy consumption of the cooling system, and improve practicality. Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0028] Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention viewed from below;

[0029] Figure 3 This is a partial three-dimensional structural diagram of the body and cooling roller of the present invention;

[0030] Figure 4 For the present invention Figure 3 Enlarged structural diagram at point A in the middle;

[0031] Figure 5 This is a partial three-dimensional structural diagram of the positioning frame and cooling roller of the present invention;

[0032] Figure 6 This is a partial three-dimensional structural diagram of the cooling roller of the present invention;

[0033] Figure 7 For the present invention Figure 6 Enlarged structural diagram at point B;

[0034] Figure 8 This is a side-view perspective three-dimensional structural diagram of the cleaning disc and the second water turbine of the present invention;

[0035] Figure 9 This is a three-dimensional structural diagram of the cooling roller and cleaning disc after they have moved according to the present invention;

[0036] Figure 10 This is a partial three-dimensional structural diagram of the water tank and filter plate of the present invention;

[0037] Figure 11 For the present invention Figure 10 Enlarged structural diagram at point C.

[0038] In the diagram: 1. Machine body; 2. First conveyor roller; 3. Second conveyor roller; 4. First extrusion roller; 5. Second extrusion roller; 6. Servo motor; 7. Mounting plate; 8. Positioning frame; 9. Cooling roller; 10. Moving block; 11. Extrusion spring; 12. Rewinding roller; 13. Water conveying pipe; 14. Treatment water tank; 15. Drive gear; 16. Rotating gear; 17. Transmission belt; 18. Half gear; 19. Driven gear; 20. Extrusion rod; 21. Mounting frame; 22. Reciprocating screw; 23. First water wheel; 24. Cleaning disc; 25. Second water wheel; 26. Filter plate; 27. Movable disc; 28. Water receiving plate; 29. ​​Beating block; 30. Force-bearing block. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] This invention provides the following technical solution: a precision calendering and molding equipment and molding process for PVC film.

[0041] Example 1: To address the problem that existing water-cooling methods for PVC film cooling suffer from poor cooling efficiency of the cooling roller 9 due to uneven heat dissipation, leading to prolonged cooling time and poor practicality, the following solution is disclosed: a machine body 1, and a first conveyor roller 2 and a second conveyor roller 3 disposed above the machine body 1 for conveying and transmission. A mounting plate 7 is also provided above the machine body 1, and a first extrusion roller 4 and a second extrusion roller 5 are rotatably mounted on the inner side of the mounting plate 7. A servo motor 6 is connected to the right end of the first extrusion roller 4. A take-up roller 1 is also provided above the machine body 1. 2. A cooling roller 9 is located on the outer side of the take-up roller 12. A positioning frame 8 is screwed on the upper part of the machine body 1. Two moving blocks 10 are slidably installed inside the positioning frame 8. The opposing surfaces of the two moving blocks 10 are sealed to a cooling roller 9 for heat exchange and cooling. Water pipes 13 are connected to both ends of the cooling roller 9. A water tank 14 is sealed to the lower part of the two water pipes 13 via a water pump. The water tank 14 is installed below the machine body 1 by screws. A cleaning disc 24 is slidably installed inside the cooling roller 9. The outer side wall of the cleaning disc 24 is attached to the inner side wall of the cooling roller 9.

[0042] The cooling roller 9 has two mounting brackets 21 inside, and a reciprocating screw 22 is rotatably mounted inside the two mounting brackets 21. A first water wheel 23 is mounted on the left end of the reciprocating screw 22, and a cleaning disc 24 is threaded through the outer side of the reciprocating screw 22.

[0043] like Figures 1-9As shown, when the cooling roller 9 cools the heated PVC film through water-cooled heat exchange, the potential energy of the water supply drives the reciprocating screw 22 connected to the outer end of the first water wheel 23 to rotate. The rotating reciprocating screw 22 then drives the cleaning disc 24 to reciprocate and scrape inside the cooling roller 9, preventing impurities from sticking to the inner wall of the cooling roller 9 and causing blockage. This improves the flowability of the cooling roller 9. When the water supply flows, the potential energy of the flow drives the second water wheel 25 to rotate once. This rotation of the second water wheel 25 accelerates the flow of water, thereby improving heat transfer efficiency, preventing temperature gradients from forming near the heat source, improving the cooling uniformity of the PVC film, shortening the cooling time of the PVC film, and improving its practicality.

[0044] Example 2 differs from Example 1 in that, while the first extrusion roller 4 and the second extrusion roller 5 are extruding and conveying the formed PVC film, the cooling roller 9 is driven by the transmission belt 17 to reciprocate and cool down, thereby improving heat dissipation efficiency. The following is disclosed:

[0045] The front ends of the first extrusion roller 4 and the second extrusion roller 5 are respectively provided with a drive gear 15 and a rotating gear 16, and the drive gear 15 and the rotating gear 16 are meshed with each other. The output end of the drive gear 15 is connected to one end of the transmission belt 17, and the other end of the transmission belt 17 is connected to the output end of the half gear 18. The half gear 18 is rotatably mounted inside the positioning frame 8, and the outer side of the half gear 18 is meshed with a driven gear 19. The driven gear 19 is rotatably mounted inside the positioning frame 8. The front end of the driven gear 19 is equipped with an extrusion rod 20, and the extrusion rod 20 corresponds to a moving block 10. The extrusion rod 20 is L-shaped. The inside of the positioning frame 8 is connected to one end of two extrusion springs 11, and the two extrusion springs 11 have the same structure. The other end of the two extrusion springs 11 is connected to the moving block 10.

[0046] like Figures 1-5As shown, during the PVC film winding process, the first conveying roller 2 and the second conveying roller 3 convey the PVC film, and then the first extrusion roller 4 and the second extrusion roller 5 extrude the PVC film. Finally, the winding roller 12 winds up the cooled PVC film. While the first extrusion roller 4 and the second extrusion roller 5 are rotating, the transmission belt 17 connected to the output end of the drive gear 15 drives the half gear 18 to rotate inside the positioning frame 8. At this time, the rotating half gear 18 drives the extrusion rod 20 installed at the output end of the driven gear 19 to extrude the moving block 10 to move its position inside the positioning frame 8. This expands the cooling range of the cooling roller 9 on the PVC film, reduces the boundary layer thermal resistance, enhances the convective heat transfer efficiency, and improves practicality. Finally, the two rollers themselves can reset the position of the cooling roller 9 after extrusion by their own elasticity, so as to facilitate subsequent reciprocating use and improve cooling efficiency.

[0047] Example 3, unlike Example 2, allows for the screening and filtration of the cooling water after impurity removal. The filtered water can then be transported via a conveying pipe to the calendering rolls for hot pressing, thus achieving waste heat recovery and reducing the energy consumption of the cooling system. This improves practicality. The following is disclosed:

[0048] A filter plate 26 is installed inside the water treatment tank 14, and a force-bearing block 30 is installed above the filter plate 26. A beater block 29 is installed above the force-bearing block 30. A movable disc 27 is rotatably installed inside the water treatment tank 14. A ring of water receiving plates 28 is evenly spaced on the outer surface of the movable disc 27. The ring of water receiving plates 28 is inclined, and beater blocks 29 are installed on the outer side of the ring of water receiving plates 28. The beater blocks 29 and the force-bearing block 30 form a beater structure.

[0049] The specific steps are as follows:

[0050] S1. Calendering: The PVC film is extruded and formed by a calender, and then the formed PVC film is extruded and conveyed by the first conveying roller 2, the second conveying roller 3, the first extrusion roller 4, and the second extrusion roller 5.

[0051] S2. Cooling and shaping: The PVC film is cooled and shaped by the cooling roller 9 to avoid insufficient cooling, which would cause the PVC film to become sticky or wrinkled.

[0052] S3. Impurity removal and cooling: The impurity removal mechanism cleans the water impurities adhering to the inner wall of the cooling roller 9 by reciprocating movement. The second water wheel 25 can also be set to accelerate the water flow, thereby improving the heat transfer efficiency, avoiding the formation of temperature gradients in areas close to the heat source, and improving the cooling uniformity of the PVC film.

[0053] S4. Screening and filtration waste heat recovery: The set filtration mechanism screens and filters the cooling water after impurity removal and cleaning. The filtered water can then be transported to the calendering rolls for hot pressing through a conveying pipe to recover and reuse waste heat, thereby reducing the energy consumption of the cooling system.

[0054] S5. Winding and storage: The cooled and formed PVC film is wound up using the winding roller 12.

[0055] like Figures 1-11 As shown, when the cooling roller 9 cools and exchanges heat on the calendered PVC film, the cooling roller 9 will transport the heat-exchanged water to the inside of the treatment water tank 14 through the water conveying pipe 13. At this time, the potential energy of the water flow will simultaneously squeeze a ring of water receiving plates 28, causing the movable plate 27 to rotate inside the treatment water tank 14. Subsequently, the rotating ring of water receiving plates 28 will drive a ring of striking blocks 29 to beat and vibrate the force-bearing block 30 set above the filter plate 26 in sequence. At this time, the vibration force of the beating can vibrate and treat the water source impurities adhering to the surface of the filter plate 26, so as to avoid the water source impurities adhering to the surface of the filter plate 26 and affecting the subsequent filtration and screening process. Not only can the filtered water be transported back to the cooling roller 9 for cooling and cooling treatment through the water conveying pipe 13, but the heat-exchanged water can also be transported to the calendering roller for hot pressing processing to realize the recovery and utilization of waste heat, reduce the energy consumption of the cooling system, and thus complete a series of tasks.

[0056] The above is the entire working process of the device, and all contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0057] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A PVC film precision calender forming equipment, comprising a machine body (1), and a first conveying roller (2) and a second conveying roller (3) arranged above the machine body (1) for conveying transmission, the upper side of the machine body (1) is further provided with a mounting plate (7), and the inner side of the mounting plate (7) is rotatably provided with a first extrusion roller (4) and a second extrusion roller (5), the right end of the first extrusion roller (4) is connected with a servo motor (6); Characterized in that: The upper side of the machine body (1) is further provided with a winding roller (12), and the outer side of the winding roller (12) corresponds to a cooling roller (9); The upper side of the machine body (1) is screw-mounted with a positioning frame (8), the inner side of the positioning frame (8) is slidably provided with two moving blocks (10), and the opposite sides of the two moving blocks (10) are sealingly connected with the cooling roller (9) for heat exchange cooling; The two ends of the cooling roller (9) are respectively connected with two water conveying pipes (13), the lower sides of the two water conveying pipes (13) are sealingly connected with a water treatment tank (14) through a water pump, and the water treatment tank (14) is screw-mounted below the machine body (1); The inner side of the cooling roller (9) is slidably provided with a cleaning disc (24), and the outer side wall of the cleaning disc (24) is connected to the inner side wall of the cooling roller (9); The inner side of the cooling roller (9) is provided with two mounting frames (21), the inner sides of the two mounting frames (21) are rotatably provided with reciprocating lead screws (22), and the left ends of the reciprocating lead screws (22) are provided with first water wheels (23), and the outer sides of the reciprocating lead screws (22) are threadedly penetrated with the cleaning disc (24); The left side of the cleaning disc (24) is rotatably provided with a ring of second water wheels (25), the outer sides of the ring of second water wheels (25) correspond to the water inlet positions of the cooling roller (9), and the ring of second water wheels (25) is provided at equal angles; The front ends of the first extrusion roller (4) and the second extrusion roller (5) are respectively provided with a drive gear (15) and a rotating gear (16), the drive gear (15) and the rotating gear (16) are meshingly connected, the output end of the drive gear (15) is connected with one end of a transmission belt (17), and the other end of the transmission belt (17) is connected with the output end of a half gear (18); The half gear (18) is rotatably mounted in the inner side of the positioning frame (8), and the outer side of the half gear (18) is meshingly connected with a driven gear (19), and the driven gear (19) is rotatably mounted in the inner side of the positioning frame (8); The front end of the driven gear (19) is provided with an extrusion rod (20), the extrusion rod (20) corresponds to the moving block (10), and the extrusion rod (20) is in the shape of "L"; One end of each of the two extrusion springs (11) is connected to the inner side of the positioning frame (8), the two extrusion springs (11) are identical in structure, and the other ends of the two extrusion springs (11) are connected with the moving block (10). The inside of the processing water tank (14) is internally provided with a filter plate (26), and the upper side of the filter plate (26) is provided with a stress block (30), and the upper side of the stress block (30) is correspondingly provided with a beating block (29), the inside of the processing water tank (14) is rotatably provided with a movable disc (27), and the outer surface of the movable disc (27) is provided with a circle of water receiving plates (28) at equal intervals, a circle of the water receiving plates (28) are in inclined shape, and the outer side of a circle of the water receiving plates (28) are all provided with beating blocks (29), and the beating blocks (29) and the stress block (30) constitute a beating structure.

2. The PVC film precision calender molding equipment according to claim 1, characterized in that: The first water wheel (23) is arranged in the inside of the cooling roller (9), the diameter of the cooling roller (9) is larger than the diameter of the first water wheel (23), and the first water wheel (23) corresponds to the water inlet position of the cooling roller (9).

3. The PVC film precision calender molding equipment according to claim 1, characterized in that, The forming process of the forming equipment is also disclosed, and the specific process steps are as follows: S1, calendering forming, the PVC film is extruded and formed by a calendering machine, and then the formed PVC film is extruded and conveyed by the first conveying roller (2), the second conveying roller (3), the first extruding roller (4) and the second extruding roller (5); S2, cooling and shaping, the conveyed PVC film is heat-exchanged and cooled and shaped by the cooling roller (9), so as to avoid the phenomenon of sticky and wrinkled PVC film caused by insufficient cooling; S3, impurity removal and cooling, the water source impurities adhered to the inner wall of the cooling roller (9) are reciprocally moved and cleaned by the impurity removal mechanism, and the second water wheel (25) can also be arranged to accelerate the flow speed of the water source, so as to improve the heat conduction efficiency, avoid the formation of temperature gradient in the area close to the heat source, and improve the cooling uniformity of the PVC film; S4, screening and filtering waste heat recovery, the cooling water after impurity removal and cleaning is screened and filtered by the filtering mechanism, so that the filtered water source can be conveyed to the calendering roller through the conveying pipe for hot pressing processing, so as to realize waste heat recovery and use, and reduce the energy consumption of the cooling system; S5, winding and storage, the PVC film after cooling and forming is wound by the winding roller (12).

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