PVDC preservative film production equipment

Abstract

The application provides a PVDC preservative film production device, the extrusion mechanism comprises an extruder, a first hopper and a second hopper, the first hopper and the second hopper are arranged on the extruder at intervals, the rough shaping mechanism is arranged between the extruder and the secondary shaping mechanism, the cutting and winding mechanism is arranged at the discharging end of the secondary shaping mechanism and comprises a winding and adhering roller, a turnover disc, an A winding roller, a B winding roller, a driving assembly and a cutting assembly, the A winding roller and the B winding roller are rotatably arranged on the turnover disc at intervals, the extruder, the driving assembly and a control device are electrically connected, the extruder processes raw materials to form a film embryo, the rough shaping mechanism is used for cooling and primary shaping of the film embryo, the secondary shaping mechanism is used for traction and secondary shaping of the annular film embryo, the winding and adhering roller is used for traction of a sheet-shaped base material to the A winding roller or the B winding roller, the driving assembly drives the A winding roller and the B winding roller to rotate for winding, and the cutting assembly is used for cutting of the sheet-shaped base material.

Description

Technical Field

[0001] This invention relates to the field of film production equipment technology, and in particular to a PVDC food preservation film production equipment. Background Technology

[0002] PVDC (polyvinylidene chloride) is a polymer material with high barrier properties, oil resistance, chemical corrosion resistance, and excellent low-temperature heat-sealing properties. Its barrier performance far exceeds that of ordinary food preservation films such as PE and PP, and it is widely used in packaging for food, medicine, cosmetics and other fields.

[0003] After PVDC cling film is extruded, blow-molded, cooled, and pulled, it needs to be wound up by a winding mechanism to neatly roll up the finished product. The structure, roll changing method, and degree of automation of the winding station directly determine the continuous production capacity of the entire production line, the flatness of the finished roll, and the labor intensity of manual operation.

[0004] Existing traditional PVDC cling film production equipment typically employs a single-station winding structure or a standard dual-station asynchronous flipping winding structure. These structures generally use a single-through air shaft with synchronously fixed ends, coupled with a single drive and single-station operation. This traditional structure can only perform winding operations at a single station, lacking the ability to operate independently at dual stations simultaneously. After winding, the machine must be stopped for roll changing, resulting in long downtime and significantly reducing the continuous production efficiency of the PVDC cling film production line. This can easily lead to production interruptions, material waste, and capacity loss.

[0005] Therefore, a new PVDC food preservation film production equipment needs to be designed to overcome the above-mentioned technical defects. Summary of the Invention

[0006] The purpose of this invention is to provide a PVDC food preservation film production equipment that can perform online cutting and winding operations, realize the alternating operation of the A winding roller and the B winding roller, and after one roll is fully wound, there is no need to stop the whole machine. The other station can be directly switched to continue winding, realizing roll changing without stopping the machine, and greatly improving the overall capacity and production efficiency of the production line.

[0007] To achieve the above objectives, the present invention provides a PVDC food preservation film production equipment, comprising: an extrusion mechanism, a coarse shaping mechanism, a secondary shaping mechanism, a cutting and winding mechanism, and a control device.

[0008] The extrusion mechanism includes an extruder, a first hopper, and a second hopper, which are installed alternately on the extruder. The coarse shaping mechanism is installed between the extruder and the secondary shaping mechanism.

[0009] The cutting and winding mechanism is installed at the discharge end of the secondary shaping mechanism and includes a winding and bonding roller, a tilting disc, an A winding roller, a B winding roller, a drive assembly, and a cutting assembly. The A winding roller and the B winding roller are rotatably mounted on the tilting disc at intervals. The extruder, the drive assembly, and the control device are electrically connected.

[0010] The extruder mixes and processes raw materials to form a preform. The coarse shaping mechanism is used to cool and pre-shape the preform. The secondary shaping mechanism pulls and shapes the annular preform. The winding and bonding roller pulls the sheet substrate onto winding roller A or winding roller B. The drive assembly drives winding roller A and winding roller B to rotate and wind the preform. The cutting assembly cuts the sheet substrate.

[0011] Preferably, the extrusion mechanism further includes a first screw feeder and a second screw feeder. The first screw feeder is connected to the first hopper, and the second screw feeder is connected to the second hopper. The first screw feeder feeds raw materials into the first hopper, and the second screw feeder feeds raw materials into the second hopper.

[0012] Preferably, the extrusion mechanism further includes a cooling fan, a screen changer, and a die. The cooling fan is installed below the extruder, the screen changer is installed at the discharge end of the extruder, and the die is connected to the screen changer.

[0013] Preferably, the rough shaping mechanism further includes a water tank, a first traction roller, a second traction roller, a vacuum box, and a first drying oven. The first traction roller is rotatably mounted above the water tank, the vacuum box is mounted above the water tank and the first traction roller, the first drying oven and the vacuum box are distributed adjacent to each other, the second traction roller is rotatably mounted above the first drying oven, and the mold is mounted on the vacuum box.

[0014] Preferably, the secondary shaping mechanism includes a first bubble stabilizer, a second bubble stabilizer, a flattening component, and an auxiliary shaping cylinder. The first bubble stabilizer, the second bubble stabilizer, and the flattening component are sequentially and spaced apart between the coarse shaping mechanism and the cutting and winding mechanism. The auxiliary shaping cylinder is interposed on the first bubble stabilizer, the second bubble stabilizer, and the flattening component.

[0015] Preferably, the first bubble stabilizer includes a first support and a plurality of first bubble deflectors, the plurality of first bubble deflectors being movably mounted on the first support and capable of being spliced ​​together to form a first discharge port.

[0016] Preferably, the second bubble stabilizer includes a second support and a plurality of second bubble deflectors, the plurality of second bubble deflectors being movably mounted on the second support and capable of being spliced ​​together to form a second discharge port.

[0017] Preferably, the flattening assembly includes a pressure roller, a herringbone plate, and a third support. The pressure roller is rotatably mounted on the third support, and the herringbone plate is mounted on the third support and arranged adjacent to the pressure roller.

[0018] Preferably, the cutting and winding mechanism further includes an auxiliary winding component, which includes a translation cylinder and a friction roller. The translation cylinder is connected to the friction roller and can drive the friction roller to move towards or away from the flipping disc.

[0019] Preferably, the PVDC food preservation film production equipment further includes a second drying oven, which is installed between the secondary shaping mechanism and the cutting and winding mechanism.

[0020] Compared with existing technologies, the advantages are: 1) Online cutting and winding operations can be performed, and the dual-station alternating operation of winding roller A 43 and winding roller B 44 can be realized. After a roll is fully wound, there is no need to stop the whole machine. The other station can be directly switched to continue winding, realizing roll changing without stopping the machine, which greatly improves the overall capacity and production efficiency of the production line.

[0021] 2) Infrared light is generated inside the second oven and absorbed by the molecular resonance of the sheet substrate. The infrared light energy is directly converted into heat energy, and the temperature rises simultaneously inside and outside. It quickly removes water and eliminates internal stress. The drying speed is faster than that of hot air and is suitable for high-speed production lines.

[0022] Other features and advantages of the invention will be set forth in the following description, and in part will be apparent from the description, or may be learned by practice of the invention. The features and advantages of the invention may be realized and obtained by means of the elements and combinations specifically pointed out in the appended claims. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the PVDC food preservation film production equipment provided by the present invention.

[0025] Figure 2 This is a schematic diagram of the PVDC food preservation film production equipment.

[0026] Figure 3 This is a schematic diagram of the PVDC food preservation film production equipment.

[0027] Figure 4This is a partial structural diagram of a PVDC food preservation film production equipment.

[0028] Figure 5 This is a schematic diagram of the roughing mechanism.

[0029] Figure 6 This is a schematic diagram of the first bubble stabilizer.

[0030] Figure 7 This is a schematic diagram of the second bubble stabilizer.

[0031] Figure 8 This is a schematic diagram of the flattening component.

[0032] Figure 9 This is a schematic diagram of the cutting and winding assembly.

[0033] Reference numerals: 1. Extrusion mechanism; 11. Extruder; 12. First hopper; 13. Second hopper; 14. First screw feeder; 15. Second screw feeder; 16. Cooling fan; 17. Screen changer; 18. Die; 2. Rough setting mechanism; 21. Water tank; 22. First traction roller; 23. Second traction roller; 24. Vacuum chamber; 25. First drying oven; 3. Secondary setting mechanism; 31. First bubble stabilizer; 311. First support; 312. First bubble deflector; 32. Second bubble stabilizer; 3 21. Second support; 322. Second bubble deflector; 33. Flattening assembly; 331. Pressure roller; 332. Herringbone plate; 333. Third support; 34. Auxiliary shaping cylinder; 4. Cutting and winding mechanism; 41. Winding and bonding roller; 42. Tilting disc; 43. A winding roller; 44. B winding roller; 45. Drive assembly; 46. Cutting assembly; 461. Lifting cylinder; 462. Cutter; 47. Auxiliary winding component; 471. Translation cylinder; 472. Friction roller; 5. Control device; 6. Second drying oven. Detailed Implementation

[0034] To make the objectives, technical solutions, and beneficial effects of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described in this specification are merely for explaining the invention and are not intended to limit the invention.

[0035] It should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0036] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "linking," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art will understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0037] Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature. Additionally, "multiple" and "several" mean two or more, unless otherwise explicitly specified.

[0038] Please see Figures 1 to 7 This invention provides a PVDC food preservation film production equipment, comprising: an extrusion mechanism 1, a coarse shaping mechanism 2, a secondary shaping mechanism 3, a cutting and winding mechanism 4, and a control device 5.

[0039] The extrusion mechanism 1 includes an extruder 11, a first hopper 12, and a second hopper 13. The first hopper 12 and the second hopper 13 are installed on the extruder 11 at intervals. The coarse shaping mechanism 2 is installed between the extruder 11 and the secondary shaping mechanism 3.

[0040] The cutting and winding mechanism 4 is installed at the discharge end of the secondary shaping mechanism 3 and includes a winding and bonding roller 41, a rotating disk 42, an A winding roller 43, a B winding roller 44, a drive assembly 45, and a cutting assembly 46. The A winding roller 43 and the B winding roller 44 are rotatably mounted on the rotating disk 42 at intervals. The extruder 11, the drive assembly 45, and the control device 5 (industrial control computer) are electrically connected. The drive assembly 45 drives the rotating disk 42, the A winding roller 43, and the B winding roller 44 to rotate.

[0041] The extruder 11 mixes and processes the raw materials in the first hopper 12 and the second hopper 13 to form an annular preform. The rough shaping mechanism 2 is used to cool and preliminarily shape the annular preform.

[0042] The secondary shaping mechanism 3 pulls and shapes the cooled annular film preform, flattening it into a sheet substrate. The winding and bonding roller 41 pulls the sheet substrate onto the A winding roller 43 or the B winding roller 44. The driving component drives the A winding roller 43 and the B winding roller 44 to rotate and wind them up. The cutting component 46 is used to cut the sheet substrate on the A winding roller 43 or the B winding roller 44.

[0043] Thus, in this technical solution, a dual-station winding operation is set up with a take-up roller A 43 and a take-up roller B 44. The take-up bonding roller 41 attaches the sheet substrate to the take-up roller A 43. After the take-up roller A 43 finishes winding, the cutting component 46 cuts the sheet substrate wound on the take-up roller A 43. The driving component 45 drives the rotating disk 42 to rotate, so that the take-up roller A 43 moves to the position of the take-up roller B 44, and the take-up roller B 44 moves to the position of the take-up roller A 43.

[0044] The take-up bonding roller 41 attaches the sheet substrate to the B take-up roller 44. After the B take-up roller 44 finishes winding, the cutting component 46 cuts the sheet substrate wound on the B take-up roller 44. The driving component 45 drives the flipping disk 42 to flip back, so that the A take-up roller 43 moves to its original position and the B take-up roller 44 moves to its original position. At the same time, the driving component 45 drives the A take-up roller 43 and the B take-up roller 44 to rotate on the flipping disk 42.

[0045] In this way, the process can be repeated to perform online cutting and winding operations, enabling the dual-station alternating operation of winding roller A 43 and winding roller B 44. After one roll is fully wound, there is no need to stop the entire machine. The machine can be directly switched to another station to continue winding, achieving roll changing without stopping the machine and greatly improving the overall capacity and production efficiency of the production line.

[0046] In one specific embodiment, the extrusion mechanism 1 further includes a first screw feeder 14 and a second screw feeder 15. The first screw feeder 14 is connected to the first hopper 12, and the second screw feeder 15 is connected to the second hopper 13. The first screw feeder 14 feeds raw materials (PE plastic material, polyethylene) into the first hopper 12, and the second screw feeder 15 feeds raw materials (PLA polylactic acid, resin raw materials, functional masterbatches and additives, etc.) into the second hopper 13. The raw materials enter the extruder 11 and are heated and plasticized into a melt.

[0047] In one specific embodiment, the extrusion mechanism 1 further includes a cooling fan 16, a screen changer 17, and a die 18. The cooling fan 16 is installed below the extruder 11, the screen changer 17 is installed at the discharge end of the extruder 11, and the die 18 is connected to the screen changer 17. The filter screen inside the screen changer 17 can block impurities, ensuring the purity of the extruded film material. The filter screen inside the screen changer 17 can also form damping, stabilizing the melt pressure and ensuring uniform flow rate inside the extruder 11, avoiding sudden changes in speed. The extruder 11 passes the melt through the screen changer 17 into the die 18, forming a uniformly thick annular preform.

[0048] In one specific embodiment, the coarse shaping mechanism 2 further includes a water tank 21, a first traction roller 22, a second traction roller 23, a vacuum chamber 24, and a first drying oven 25. The first traction roller 22 is rotatably mounted above the water tank 21, the vacuum chamber 24 is mounted above the water tank 21 and the first traction roller 22, the first drying oven 25 and the vacuum chamber 24 are distributed adjacent to each other, the second traction roller 23 is rotatably mounted above the first drying oven 25, and the mold 18 is mounted on the vacuum chamber 24. After the annular preform comes out of the mold 18, it passes through the vacuum chamber 24 and is then pulled by the first traction roller 22 to the first drying oven 25. After coming out of the first drying oven 25, the annular preform is then pulled by the second traction roller 23 to the secondary shaping mechanism 3.

[0049] Thus, when the annular film preform is pulled by the first traction roller 22, it will come into contact with the water in the water tank 21, cooling the annular film preform and initially fixing its thickness and width. The vacuum box 24 uses negative pressure to remove water droplets and water mist from the surface of the annular film preform, leaving no water stains and preventing watermarks or water spots after the annular film preform enters the first drying oven 25. The first drying oven 25 dries the residual trace moisture, thoroughly drying the surface of the annular film preform. Low-temperature constant temperature heating releases the internal stress generated by the stretching of the PVDC film, preheating and significantly reducing natural shrinkage, warping, and edge curling during later storage, making the molecular arrangement of the annular film preform more stable, and improving the subsequent slitting, rewinding, and bonding performance.

[0050] In one specific embodiment, the secondary shaping mechanism 3 includes a first bubble stabilizer 31, a second bubble stabilizer 32, a flattening component 33, and an auxiliary shaping cylinder 34. The first bubble stabilizer 31, the second bubble stabilizer 32, and the flattening component 33 are sequentially and spaced apart between the coarse shaping mechanism 2 and the cutting and winding mechanism 4. The auxiliary shaping cylinder 34 is interposed on the first bubble stabilizer 31, the second bubble stabilizer 32, and the flattening component 33. When the annular preform after preliminary shaping passes through the auxiliary shaping cylinder 34 on the first bubble stabilizer 31, the second bubble stabilizer 32, and the flattening component 33, the annular preform is stably stretched after being fitted onto the auxiliary shaping cylinder 34, suppressing the swing and displacement of the annular preform, making the circumferential force of the annular preform uniform, effectively improving the thickness of the annular preform, and avoiding wrinkles, deviation, and film breakage. Then, the flattening component 33 flattens the annular preform into a sheet-like substrate.

[0051] In one specific embodiment, the first bubble stabilizer 31 includes a first support 311 and a plurality of first bubble deflectors 312. The plurality of first bubble deflectors 312 are movably mounted on the first support 311 and can be assembled into a circular or square first discharge port. This can limit the deviation of the annular preform and help stabilize the material flow trajectory. It should be noted that in this embodiment, the first discharge port is square, and the plurality of first bubble deflectors 312 movably mounted on the first support 311 can adaptively adjust their installation positions, thereby adjusting the diameter of the assembled first discharge port.

[0052] In one specific embodiment, the second bubble stabilizer 32 includes a second support 321 and a plurality of second bubble deflectors 322. The plurality of second bubble deflectors 322 are movably mounted on the second support 321 and can be assembled into a circular or square second discharge port. This can limit the deviation of the annular preform and help stabilize the material flow trajectory. It should be noted that in this embodiment, the second discharge port is circular, and the plurality of second bubble deflectors 322 movably mounted on the second support 321 can adaptively adjust their installation positions, thereby adjusting the diameter of the assembled second discharge port.

[0053] In one specific embodiment, the flattening assembly 33 includes a pressure roller 331, a herringbone plate 332, and a third support 333. The pressure roller 331 is rotatably mounted on the third support 333, and the herringbone plate 332 is mounted on the third support 333 and arranged adjacent to the pressure roller 331. In this way, the herringbone plate 332 gradually closes the annular film preform, and then the pressure roller 331 flattens the two stacked sheet substrates.

[0054] In one specific embodiment, the PVDC food preservation film production equipment further includes a second drying oven 6, which is installed between the flattening component 33 of the secondary shaping mechanism 3 and the winding and bonding roller 41 of the cutting and winding mechanism 4. It should be noted that the second drying oven 6 is an infrared light drying oven. Infrared light is generated inside the infrared light drying oven and absorbed by the molecular resonance of the sheet-like substrate. The infrared light energy is directly converted into heat energy, resulting in simultaneous internal and external heating, rapid dehydration, and elimination of internal stress. The drying speed is faster than hot air, making it suitable for high-speed production lines.

[0055] In one specific embodiment, the cutting and winding mechanism 4 further includes an auxiliary winding component 47, which includes a translation cylinder 471 and a friction roller 472. The translation cylinder 471 is connected to the friction roller 472, and the translation cylinder 471 can drive the friction roller 472 to move towards or away from the flipping disk 42.

[0056] When take-up roller A 43 is winding, take-up bonding roller 41 pulls the sheet substrate onto friction roller 472. Translation cylinder 471 extends, causing friction roller 472 to contact take-up roller A 43 on flip plate 42, thereby bonding the sheet substrate on friction roller 472 onto take-up roller A 43. After take-up roller A 43 finishes winding, translation cylinder 471 retracts, moving electric friction roller 472 back to its original position. When take-up roller B 44 is winding, translation cylinder 471 extends, causing friction roller 472 to contact take-up roller B 44 on flip plate 42, thereby bonding the sheet substrate on friction roller 472 onto take-up roller B 44.

[0057] In one specific embodiment, the cutting assembly 46 includes a lifting cylinder 461 and a cutter 462. The cutter 462 is located below the flipping disk 42. The lifting cylinder 461 is connected to the cutter 462. The lifting cylinder 461 can drive the cutter 462 to move up and down, so that the cutter 462 can cut the sheet substrate that has been wound by the A winding roller 43 and the B winding roller 44 on the flipping disk 42.

[0058] It should be noted that the drive component 45 is a servo motor, which is electrically connected to the control device 5. The servo motor, together with gears and chains, drives the rotating disc 42, A winding roller 43, and B winding roller 44 to rotate. The PVDC preservation film production equipment is equipped with an air pipe to provide air pressure to the translation cylinder 471 and the lifting cylinder 461. The air pipe is equipped with a solenoid valve that is electrically connected to the control device 5.

[0059] Control device 5 issues control commands to start, stop, and speed adjust the extruder 11 and servo motor; control device 5 controls the on / off switching of solenoid valves by outputting electrical signals, and the opening and closing of solenoid valves controls the air supply to translation cylinder 471 and lifting cylinder 461, thereby driving translation cylinder 471 and lifting cylinder 461 to complete the extension and retraction actions; through the built-in program logic timing control of control device 5, the linkage and coordination of servo operation, solenoid valve switching, translation cylinder 471 and lifting cylinder 461 are realized to complete the fully automatic control of automatic winding, automatic cutting, automatic station switching and non-stop roll changing.

[0060] The present invention is not limited to the description in the specification and embodiments, and thus other advantages and modifications can be readily realized by those skilled in the art. Therefore, the present invention is not limited to the specific details, representative devices and illustrated examples shown and described herein without departing from the spirit and scope of the general concept as defined by the claims and their equivalents.

Claims

1. A PVDC food preservation film production equipment, characterized in that, include: The extrusion mechanism (1), the coarse shaping mechanism (2), the secondary shaping mechanism (3), the cutting and winding mechanism (4), and the control device (5) are included. The extrusion mechanism (1) includes an extruder (11), a first hopper (12), and a second hopper (13). The first hopper (12) and the second hopper (13) are installed alternately on the extruder (11). The coarse shaping mechanism (2) is installed between the extruder (11) and the secondary shaping mechanism (3). The cutting and winding mechanism (4) is installed at the discharge end of the secondary shaping mechanism (3) and includes a winding and bonding roller (41), a rotating disk (42), an A winding roller (43), a B winding roller (44), a drive assembly (45), and a cutting assembly (46). The A winding roller (43) and the B winding roller (44) are rotated on the rotating disk (42) at intervals. The extruder (11), the drive assembly (45), and the control device (5) are electrically connected. The extruder (11) mixes and processes raw materials to form a film preform. The coarse shaping mechanism 2 is used to cool and pre-shape the film preform. The secondary shaping mechanism (3) pulls and shapes the annular film preform. The winding and bonding roller (41) pulls the sheet substrate onto the A winding roller (43) or the B winding roller (44). The driving assembly drives the A winding roller (43) and the B winding roller (44) to rotate and wind them up. The cutting assembly (46) cuts the sheet substrate.

2. The PVDC food preservation film production equipment as described in claim 1, characterized in that, The extrusion mechanism (1) further includes a first screw feeder (14) and a second screw feeder (15). The first screw feeder (14) is connected to the first hopper (12), and the second screw feeder (15) is connected to the second hopper (13). The first screw feeder (14) feeds the raw material into the first hopper (12), and the second screw feeder (15) feeds the raw material into the second hopper (13).

3. The PVDC food preservation film production equipment as described in claim 1, characterized in that, The extrusion mechanism (1) further includes a cooling fan (16), a screen changer (17) and a die (18). The cooling fan (16) is installed below the extruder (11), the screen changer (17) is installed at the discharge end of the extruder (11), and the die (18) is connected to the screen changer (17).

4. The PVDC food preservation film production equipment as described in claim 3, characterized in that, The rough shaping mechanism (2) further includes a water tank (21), a first traction roller (22), a second traction roller (23), a vacuum box (24), and a first drying oven (25). The first traction roller (22) is rotatably mounted above the water tank (21). The vacuum box (24) is mounted above the water tank (21) and the first traction roller (22). The first drying oven (25) and the vacuum box (24) are distributed adjacent to each other. The second traction roller (23) is rotatably mounted above the first drying oven (25). The mold (18) is mounted on the vacuum box (24).

5. The PVDC food preservation film production equipment as described in claim 1, characterized in that, The secondary shaping mechanism (3) includes a first bubble stabilizer (31), a second bubble stabilizer (32), a flattening component (33), and an auxiliary shaping cylinder (34). The first bubble stabilizer (31), the second bubble stabilizer (32), and the flattening component (33) are sequentially and spaced apart between the coarse shaping mechanism (2) and the cutting and winding mechanism (4). The auxiliary shaping cylinder (34) is interspersed on the first bubble stabilizer (31), the second bubble stabilizer (32), and the flattening component (33).

6. The PVDC food preservation film production equipment as described in claim 5, characterized in that, The first bubble stabilizer (31) includes a first support (311) and a plurality of first bubble deflectors (312). The plurality of first bubble deflectors (312) are movably mounted on the first support (311) and can be spliced ​​together to form a first discharge port.

7. The PVDC food preservation film production equipment as described in claim 5, characterized in that, The second bubble stabilizer (32) includes a second support (321) and a plurality of second bubble deflectors (322). The plurality of second bubble deflectors (322) are movably mounted on the second support (321) and can be spliced ​​together to form a second discharge port.

8. The PVDC food preservation film production equipment as described in claim 1, characterized in that, The flattening assembly (33) includes a pressure roller (331), a herringbone plate (332), and a third support (333). The pressure roller (331) is rotatably mounted on the third support (333), and the herringbone plate (332) is mounted on the third support (333) and arranged adjacent to the pressure roller (331).

9. The PVDC food preservation film production equipment as described in claim 1, characterized in that, The cutting and winding mechanism (4) further includes an auxiliary winding component (47), which includes a translation cylinder (471) and a friction roller (472). The translation cylinder (471) is connected to the friction roller (472), and the translation cylinder (471) can drive the friction roller (472) to move closer to or further away from the flipping disc (42).

10. The PVDC food preservation film production equipment as described in claim 1, characterized in that, The PVDC food preservation film production equipment also includes a second drying oven (6), which is installed between the secondary shaping mechanism (3) and the cutting and winding mechanism (4).

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