PVC film precision calendaring molding equipment and molding process

Abstract

The invention discloses PVC film precision calendaring forming equipment, and belongs to the technical field of PVC film forming equipment.The PVC film precision calendaring forming equipment comprises a machine body, a first conveying roller and a second conveying roller, the first conveying roller and the second conveying roller are arranged above the machine body and used for conveying and transmission, a positioning frame is installed above the machine body through screws, and two moving blocks are slidably installed in the positioning frame; the opposite faces of the two moving blocks are connected with cooling rollers used for heat exchange and cooling in a sealed mode, and cleaning discs are installed in the cooling rollers in a sliding mode. The PVC film precise calendaring forming equipment is provided with the cleaning disc, a reciprocating screw rod connected with the outer end of a first water wheel can be driven to rotate through potential energy conveyed by the cleaning disc when a water source is conveyed, and at the moment, the rotating reciprocating screw rod can drive the cleaning disc to do position reciprocating motion in a cooling roller at the same time; therefore, water source impurities adhering to the inner wall of the cooling roller can be cleaned and scraped in a reciprocating mode through the driving cleaning disc moving in a reciprocating mode, and the phenomenon that impurities adhere to the inner wall of the cooling roller to cause blockage is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of PVC film forming equipment, and specifically relates to a PVC film precision calendering forming equipment and a forming process. Background Art

[0002] The PVC film precision calendering forming equipment is a professional mechanical equipment for producing high-precision PVC films. Through the calendering process, PVC raw materials are processed into films with specific thickness, width, and surface quality, which are widely used in packaging materials, building materials, electronic appliances, and other fields. When processing and forming PVC films precisely, an independent cooling mechanism is basically required to cool the formed PVC films. However, the existing cooling mechanisms basically use air cooling or a single air cooling to blow and dissipate heat. However, this cooling method is very single and the cooling effect is poor, which will affect the later forming efficiency of the PVC film.

[0003] In order to overcome the above defects, in the prior art 1 (Chinese patent with application number CN202420965446.7 and application date May 7, 2024), a blowing device blows cooling air to assist. Compared with traditional natural cooling and single air cooling, the cooling effect and efficiency will be improved. Furthermore, when processing and cooling PVC films, it is more conducive to the PVC film to achieve uniform heat dissipation and temperature reduction, improve the heat dissipation efficiency, and is conducive to improving the final forming effect and basic quality of the product. There is also the prior art 2 (Chinese patent with application number CN201910667624.1 and application date July 23, 2019), a PVC film production humidifying equipment. When the solution on the coating part becomes less, the liquid tank in the cylindrical support rod will slowly moisten the coating part through the fine holes, so as to replenish the solution, so that the coating part can effectively cool the PVC film. And the prior art 3 (Chinese patent with application number CN202022095121.2 and application date September 22, 2020), a PVC material film processing and forming equipment. The water in the water tank is cooled by the refrigerator inside the roller, and then is transported to the cooling pipe through the submersible pump. The heat is transferred to the cooling roller through the cooling pipe, so as to cool the film, solving 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] Although the prior art can achieve the cooling treatment of the formed PVC film and improve the processing efficiency of the PVC film, when cooling and exchanging heat with the PVC film by means of water cooling, the cooling efficiency of the cooling roller is poor due to the inability to achieve uniform heat dissipation, which will prolong the cooling time of the PVC film and the practicability is poor. Therefore, a PVC film precision calendering forming equipment and a forming process are proposed to solve the problems raised above. Summary of the Invention

[0005] The purpose of the present invention is to provide a precision calendering forming device and forming process for PVC films, so as to solve the problem proposed in the above background technology that when the precision calendering forming device for PVC films on the current market cools the PVC film by means of water cooling, the cooling efficiency of the cooling roller is poor due to the inability to achieve uniform heat dissipation, which will prolong the cooling time of the PVC film and the practicability is poor.

[0006] To achieve the above purpose, the present invention provides the following technical solutions: A precision calendering forming device and forming process for PVC films, including a fuselage, and a first conveying roller and a second conveying roller arranged above the fuselage for conveying and driving. An installation plate is also provided above the fuselage, and a first extrusion roller and a second extrusion roller are rotatably installed inside the installation plate. The right end of the first extrusion roller is connected to a servo motor. A winding roller is also provided above the fuselage, and a cooling roller is corresponding to the outside of the winding roller. A positioning frame is installed on the fuselage by screws, and two moving blocks are slidably installed inside the positioning frame. The opposite sides of the two moving blocks are hermetically connected to a cooling roller for heat exchange and cooling. The two ends of the cooling roller are respectively connected to a conveying water pipe, and the lower sides of the two conveying water pipes are hermetically connected to a treatment water tank by a water pump. The treatment water tank is installed under the fuselage by screws. A cleaning disc is slidably installed inside the cooling roller, and the outer side wall of the cleaning disc is attached to the inner side wall of the cooling roller.

[0007] Preferably, two mounting frames are fixedly installed inside the cooling roller, and a reciprocating lead screw is rotatably installed inside the two mounting frames. The left end of the reciprocating lead screw is installed with a first water wheel, and the cleaning disc is threadedly penetrated through the outside of the reciprocating lead screw.

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

[0009] Preferably, a circle of second water wheels is rotatably installed on the left side of the cleaning disc, and the outside of the circle of second water wheels corresponds to the water inlet position of the cooling roller, and the circle of second water wheels is arranged at equal angles.

[0010] Preferably, a driving gear and a rotating gear are respectively arranged at the front ends of the first extrusion roller and the second extrusion roller, and the driving gear and the rotating gear are meshed with each other. One end of a transmission belt is connected to the output end of the driving gear, 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 installed inside the positioning frame, and the outside of the half gear is meshed with a driven gear, and the driven gear is rotatably installed inside the positioning frame.

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

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

[0014] Preferably, a filter plate is installed inside the treatment water tank, and a stress block is installed above the filter plate, and there is a flapping block corresponding to the upper part of the stress block. A movable disk is rotatably installed inside the treatment water tank, and a circle of water receiving plates is equidistantly arranged on the outer surface of the movable disk. The circle of water receiving plates is in an inclined shape, and flapping blocks are installed on the outer sides of the circle of water receiving plates. The flapping block and the stress block form a flapping structure.

[0015] Preferably, the specific method steps are as follows: S1. Calendering and forming: The PVC film is extruded and formed by a calender, and then the formed PVC film is extruded and conveyed by a first conveying roller, a second conveying roller, a first extrusion roller and a second extrusion roller; S2. Cooling and shaping: The conveyed PVC film is heat-exchanged and cooled and shaped by the provided cooling roller to avoid the phenomenon of stickiness and wrinkling of the PVC film caused by insufficient cooling; S3. Impurity removal and cooling: The water source impurities adhered to the inner wall of the cooling roller are reciprocally moved and cleaned by the provided impurity removal mechanism, and the flow rate of the water source can also be accelerated by the provided circle of second water wheels, so that the heat conduction efficiency can be improved, the temperature gradient is not easily formed in the area close to the heat source, and the cooling uniformity efficiency of the PVC film is improved; S4. Screening, filtering and waste heat recovery: The cooled water after impurity removal and cleaning is screened and filtered by the provided filtering mechanism, so that the filtered water source can be conveyed to the calender roller through a conveying pipe for hot pressing processing to realize waste heat recovery and use, and the energy consumption of the cooling system is reduced; S5. Rewinding and storage: The cooled and formed PVC film is rewound by the provided rewinding roller.

[0016] Compared with the prior art, the beneficial effects of the present invention are: (1) A cleaning disk is provided. A reciprocating lead screw is rotatably installed inside the cooling roller through a mounting frame, and a first water wheel is connected to the left end of the reciprocating lead screw. While the water source is being transported, the potential energy of the transported water can drive the reciprocating lead screw connected to the outer end of the first water wheel to rotate. At this time, the rotating reciprocating lead screw will simultaneously drive the cleaning disk to reciprocate inside the cooling roller, so that the cleaning disk can reciprocally clean and scrape the water impurities adhering to the inner wall of the cooling roller, avoiding the phenomenon of impurities adhering to the inner wall of the cooling roller and causing blockage, improving the flow and dredging property of the cooling roller, and having better practicability.

[0017] (2) Further, a circle of second water wheels is rotatably installed on the outer side of the cleaning disk, and there is a water inlet corresponding to the outer side of the circle of second water wheels. When the water source is flowing, the potential energy of the flowing water can drive the circle of second water wheels to rotate. At this time, the rotating circle of second water wheels will accelerate the flow rate of the water source, thereby improving the heat conduction efficiency, avoiding the formation of a temperature gradient in the area close to the heat source, and improving the cooling uniformity efficiency of the PVC film.

[0018] (3) A moving block is provided. A positioning frame is screw-mounted above the fuselage, and a cooling roller is slidably installed above the positioning frame through the moving block. While the PVC film is being actually wound up, moving the two moving blocks can drive the cooling roller to reciprocate and cool the PVC film, increasing the cooling range of the cooling roller, reducing the boundary layer thermal resistance, enhancing the convective heat transfer efficiency, and having better practicability.

[0019] (4) Further, while the first extrusion roller and the second extrusion roller are extruding and transporting the formed PVC film, the transmission belt connected to the output end of the driving gear will simultaneously drive the half gear to rotate inside the positioning frame. Since the outer side of the half gear is meshed with a driven gear, the half gear can drive the extrusion rod to squeeze the moving block to reciprocate through the compression spring while rotating, thereby expanding the cooling range of the cooling roller, eliminating the need for complex manual operation steps, and having better practicability.

[0020] (5) A filter plate is provided. When the water pipe transports the heat-exchanged water source to the inside of the treatment water tank, the potential energy of the flowing water will simultaneously squeeze a circle of water receiving plates to drive the movable disk to rotate inside the treatment water tank. At this time, the rotating circle of water receiving plates will drive a circle of beating blocks to sequentially beat and vibrate the force-receiving blocks arranged above the filter plate. At this time, the beating vibration force can vibrate and process the water impurities adhering to the surface of the filter plate, avoiding the water impurities 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 back to the cooling roller through the water pipe for cooling and temperature reduction treatment, but also the heat-exchanged water source can be transported to the calender roller for hot pressing processing to realize waste heat recovery and use, reducing the energy consumption of the cooling system and having better practicability. Brief Description of the Drawings

[0021] Figure 1 It is a three - dimensional structure schematic diagram of the present invention; Figure 2 It is a bottom three - dimensional structure schematic diagram of the present invention; Figure 3 It is a partial three - dimensional structure schematic diagram of the fuselage and the cooling roller of the present invention; Figure 4 For the present invention Figure 3 The enlarged structure schematic diagram at position A in; Figure 5 It is a partial three - dimensional structure schematic diagram of the positioning frame and the cooling roller of the present invention; Figure 6 It is a partial three - dimensional structure schematic diagram of the cooling roller of the present invention; Figure 7 For the present invention Figure 6 The enlarged structure schematic diagram at position B in; Figure 8 It is a side three - dimensional structure schematic diagram of the cleaning disc and the second water wheel of the present invention; Figure 9 It is a three - dimensional structure schematic diagram after the cooling roller and the cleaning disc of the present invention are moved; Figure 10 It is a partial three - dimensional structure schematic diagram of the treatment water tank and the filter plate of the present invention; Figure 11 For the present invention Figure 10 The enlarged structure schematic diagram at position C in.

[0022] In the figure: 1, fuselage; 2, first conveying roller; 3, second conveying 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, winding roller; 13, conveying water pipe; 14, treatment water tank; 15, driving gear; 16, rotating gear; 17, transmission belt; 18, half gear; 19, driven gear; 20, extrusion rod; 21, mounting frame; 22, reciprocating lead screw; 23, first water wheel; 24, cleaning disc; 25, second water wheel; 26, filter plate; 27, movable disc; 28, water receiving plate; 29, flapping block; 30, stress block. Detailed Description of the Invention

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0024] The present invention provides the following technical solutions, a precision calendering forming device and forming process for PVC films: Example 1. To solve the problem that when the PVC film is heat exchanged and cooled by water cooling, the cooling efficiency of the cooling roller 9 is poor due to the inability to achieve uniform heat dissipation, which will prolong the cooling time of the PVC film and the practicability is poor. It discloses: a fuselage 1, and a first conveying roller 2 and a second conveying roller 3 arranged above the fuselage 1 for conveying and driving. Above the fuselage 1, there is also an installation plate 7, and a first extrusion roller 4 and a second extrusion roller 5 are rotatably installed inside the installation plate 7. The right end of the first extrusion roller 4 is connected to a servo motor 6. Above the fuselage 1, there is also a winding roller 12, and a cooling roller 9 corresponds to the outside of the winding roller 12. The fuselage 1 is screwed with a positioning frame 8, and two moving blocks 10 are slidably installed inside the positioning frame 8, and the opposite sides of the two moving blocks 10 are hermetically connected with a cooling roller 9 for heat exchange and cooling. The two ends of the cooling roller 9 are respectively connected with a conveying water pipe 13, and the lower parts of the two conveying water pipes 13 are hermetically connected with a treatment water tank 14 through a water pump, and the treatment water tank 14 is screwed to the lower part of the fuselage 1. A cleaning disc 24 is slidably installed inside the cooling roller 9, and the outer side wall of the cleaning disc 24 is attached to the inner side wall of the cooling roller 9.

[0025] Two mounting frames 21 are fixedly installed inside the cooling roller 9, and a reciprocating lead screw 22 is rotatably installed inside the two mounting frames 21, and a first water wheel 23 is installed at the left end of the reciprocating lead screw 22. The cleaning disc 24 is threadedly penetrated through the outside of the reciprocating lead screw 22.

[0026] As Figures 1 - 9 shown, when the cooling roller 9 cools the heat-formed PVC film by water-cooled heat exchange, the potential energy of the water source during transportation can drive the reciprocating lead screw 22 connected to the outer end of the first water wheel 23 to rotate. Subsequently, the rotating reciprocating lead screw 22 will drive the cleaning disc 24 to reciprocate and clean and scrape inside the cooling roller 9, avoiding the phenomenon of impurities sticking to the inner wall of the cooling roller 9 and causing blockage, improving the flow and dredging property of the cooling roller 9. When the water source is transported and flows, the potential energy of the flow drives a second water wheel 25 to rotate in a circle. At this time, the rotating second water wheel 25 will accelerate the flow rate of the water source, thereby improving the heat conduction efficiency, avoiding the formation of temperature gradients in the area close to the heat source, improving the cooling uniformity efficiency of the PVC film, shortening the cooling time of the PVC film, and having better practicability.

[0027] Example 2. Different from Example 1, the cooling roller 9 can be driven to reciprocate and cool down by the transmission belt 17 while the first extrusion roller 4 and the second extrusion roller 5 extrude and convey the formed PVC film, improving the heat dissipation efficiency. It discloses: A driving gear 15 and a rotating gear 16 are respectively arranged at the front ends of the first extrusion roller 4 and the second extrusion roller 5, and the driving gear 15 and the rotating gear 16 are meshed and connected with each other. One end of a transmission belt 17 is connected to the output end of the driving gear 15, and the other end of the transmission belt 17 is connected to the output end of a half gear 18. The half gear 18 is rotatably installed inside a 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 installed inside the positioning frame 8. An extrusion rod 20 is installed at the front end of the driven gear 19, and the extrusion rod 20 corresponds to a moving block 10. The extrusion rod 20 is in an "L" shape. One ends of two extrusion springs 11 are connected inside the positioning frame 8. The two extrusion springs 11 have the same structure, and the other ends of the two extrusion springs 11 are connected to the moving block 10.

[0028] As Figures 1 - 5 shown, during the winding process of the PVC film, the first conveying roller 2 and the second conveying roller 3 will convey the PVC film, and then the first extrusion roller 4 and the second extrusion roller 5 can extrude the PVC film. Then, the cooled PVC film can be wound by the winding roller 12. While the first extrusion roller 4 and the second extrusion roller 5 are rotating by extrusion, the transmission belt 17 connected to the output end of the driving gear 15 will simultaneously drive the half gear 18 to rotate inside the positioning frame 8. At this time, the rotating half gear 18 can drive 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, so as to expand the cooling range of the cooling roller 9 for the PVC film, reduce the boundary layer thermal resistance, enhance the convective heat transfer efficiency, and have better practicability. Finally, the positions of the cooling roller 9 after extrusion movement can be reset by the elastic force of the two of them for convenient later repeated use, and the cooling efficiency is better.

[0029] Embodiment 3, different from Embodiment 2, can perform screening and filtering treatment on the cooling water after impurity removal and cleaning. Thus, the filtered water source can be transported through a delivery pipe to the calender roller for hot pressing processing to achieve waste heat recovery and use, reduce the energy consumption of the cooling system, and have better practicability. It discloses: A filter plate 26 is installed inside a treatment water tank 14, and a force receiving block 30 is installed above the filter plate 26. A flapping block 29 corresponds to the force receiving block 30 above. A movable disk 27 is rotatably installed inside the treatment water tank 14, and a circle of water receiving plates 28 are equidistantly arranged on the outer surface of the movable disk 27. The circle of water receiving plates 28 is in an inclined shape, and flapping blocks 29 are installed on the outer sides of the circle of water receiving plates 28. The flapping blocks 29 and the force receiving block 30 form a flapping structure.

[0030] The specific method steps are as follows: S1. Calendering forming: 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. S2. Cooling and shaping: The conveyed PVC film is heat-exchanged and cooled and shaped by the provided cooling roller 9 to avoid the phenomena of stickiness and wrinkling of the 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 cleaned by the provided impurity removal mechanism, and the flow rate of the water source can also be accelerated by the provided ring of second water wheels 25, so as to improve the heat conduction efficiency, avoid the formation of temperature gradients in the area close to the heat source, and improve the cooling uniformity efficiency of the PVC film. S4. Screening, filtering and waste heat recovery: The cooled water after impurity removal and cleaning is screened and filtered by the provided filtering mechanism, so that the filtered water source can be conveyed to the calender roller through the conveying pipe for hot pressing processing to realize waste heat recovery and use, and the energy consumption of the cooling system is reduced. S5. Rewinding and storing: The cooled and formed PVC film is rewound by the provided rewinding roller 12.

[0031] As Figures 1 - 11 shown, when the cooling roller 9 cools and exchanges heat with the calendered and formed PVC film, the cooling roller 9 will convey the heat-exchanged water source to the inside of the treatment water tank 14 through the conveying water pipe 13. At this time, the potential energy of the water flow will simultaneously squeeze a ring of water receiving plates 28 to drive the movable disk 27 to rotate inside the treatment water tank 14. Subsequently, the rotated ring of water receiving plates 28 will drive a ring of flapping blocks 29 to sequentially flap and vibrate the force receiving blocks 30 arranged above the filter plate 26. At this time, the flapping vibration force can vibrate the water source impurities adhered to the surface of the filter plate 26 to avoid the water source impurities adhering to the surface of the filter plate 26 and affecting the subsequent filtering and screening treatment. Not only can the filtered water source be conveyed to the cooling roller 9 again through the conveying water pipe 13 for cooling and temperature reduction treatment, but also the heat-exchanged water source can be conveyed to the calender roller for hot pressing processing to realize waste heat recovery and utilization, reduce the energy consumption of the cooling system, and thus complete a series of work.

[0032] The above is the working process of the entire device, and the content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0033] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A precision calendering forming device for PVC film, comprising a fuselage (1), and a first conveying roller (2) and a second conveying roller (3) arranged above the fuselage (1) for conveying and driving. Above the fuselage (1), there is also an installation plate (7), and a first extrusion roller (4) and a second extrusion roller (5) are rotatably installed inside the installation plate (7). The right end of the first extrusion roller (4) is connected to a servo motor (6); It is characterized in that: Above the fuselage (1), there is also a winding roller (12), and a cooling roller (9) corresponds to the outside of the winding roller (12); A positioning frame (8) is installed on the fuselage (1) by screws, and two moving blocks (10) are slidably installed inside the positioning frame (8), and a cooling roller (9) for heat exchange and cooling is hermetically connected to the opposite sides of the two moving blocks (10); Both ends of the cooling roller (9) are respectively connected to a conveying water pipe (13), and the lower parts of the two conveying water pipes (13) are hermetically connected to a treatment water tank (14) through a water pump, and the treatment water tank (14) is installed under the fuselage (1) by screws; A cleaning disc (24) is slidably installed inside the cooling roller (9), and the outer side wall of the cleaning disc (24) is attached to the inner side wall of the cooling roller (9).

2. The precision calendering forming equipment for a PVC film according to claim 1, wherein: Two mounting frames (21) are fixedly installed inside the cooling roller (9), and a reciprocating lead screw (22) is rotatably installed inside the two mounting frames (21), and a first water wheel (23) is installed at the left end of the reciprocating lead screw (22). The outer side of the reciprocating lead screw (22) is threadedly penetrated by the cleaning disc (24).

3. The precision calendering forming equipment for PVC film according to claim 2, wherein: The first water wheel (23) is arranged inside the cooling roller (9), the diameter of the cooling roller (9) is larger than that of the first water wheel (23), and the first water wheel (23) corresponds to the water inlet position of the cooling roller (9).

4. The precision calendering forming equipment for a PVC film according to claim 2, characterized in that: A circle of second water wheels (25) is rotatably installed on the left side of the cleaning disc (24), and the outside of the circle of second water wheels (25) corresponds to the water inlet position of the cooling roller (9), and the circle of second water wheels (25) is arranged at equal angles.

5. The precision calendering forming equipment for a PVC film according to claim 1, characterized in that: Drive gears (15) and rotating gears (16) are respectively arranged at the front ends of the first extrusion roller (4) and the second extrusion roller (5), and the drive gear (15) and the rotating gear (16) are meshed with each other. One end of a transmission belt (17) is connected to the output end of the drive gear (15), and the other end of the transmission belt (17) is connected to the output end of a half gear (18).

6. The precision calendering forming equipment for a PVC film according to claim 5, characterized in that: The half gear (18) is rotatably installed inside the positioning frame (8), and the outside of the half gear (18) is meshed with a driven gear (19), and the driven gear (19) is rotatably installed inside the positioning frame (8).

7. The precision calendering forming equipment for a PVC film according to claim 6, characterized in that: An extrusion rod (20) is installed at the front end of the driven gear (19), and the extrusion rod (20) corresponds to the moving block (10), and the extrusion rod (20) is in an "L" shape.

8. The precision calendering forming equipment for PVC film according to claim 6, characterized in that: One ends of two extrusion springs (11) are connected inside the positioning frame (8), and the two extrusion springs (11) have the same structure, and the other ends of the two extrusion springs (11) are connected to the moving block (10).

9. The precision calendering forming equipment for a PVC film according to claim 1, wherein: A filter plate (26) is installed inside the treatment water tank (14), a force-receiving block (30) is installed above the filter plate (26), and a flapping block (29) corresponds to the upper part of the force-receiving block (30). A movable disc (27) is rotatably installed inside the treatment water tank (14), and a circle of water receiving plates (28) are equidistantly arranged on the outer surface of the movable disc (27). The circle of water receiving plates (28) is in an inclined shape, and flapping blocks (29) are installed on the outer sides of the circle of water receiving plates (28). The flapping blocks (29) and the force-receiving block (30) form a flapping structure.

10. The forming process of a precision calendering forming device for PVC films, characterized in that: The specific method steps are as follows: S1. Calendering and forming: The PVC film is extruded and formed by a calender, and then the formed PVC film is extruded and conveyed by a first conveying roller (2), a second conveying roller (3), a first extrusion roller (4) and a second extrusion roller (5). S2. Cooling and shaping: The conveyed PVC film is heat-exchanged and cooled and shaped by the provided cooling roller (9) to avoid the phenomena of stickiness and wrinkling of the 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 provided impurity removal mechanism, and the flow rate of the water source can be accelerated by the provided circle of second water wheels (25), so that the heat conduction efficiency can be improved, the temperature gradient is not easily formed in the area close to the heat source, and the cooling uniformity efficiency of the PVC film is improved. S4. Screening, filtering and waste heat recovery: The cooled water after impurity removal and cleaning is screened and filtered by the provided filtering mechanism, so that the filtered water source can be conveyed to the calender roller through a conveying pipe for hot pressing processing to realize waste heat recovery and use, and the energy consumption of the cooling system is reduced. S5. Rewinding and storage: The cooled and formed PVC film is rewound by the provided rewinding roller (12).

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