A cooling and shaping device for polyethylene film production

Abstract

This invention relates to a cooling and shaping device for polyethylene film production, comprising a mounting base, guide rollers, a shaping module, a herringbone frame, and a cooling module. The mounting base has a U-shaped cross-section, with bolt holes evenly distributed on its upper surface. Guide rollers are evenly mounted on the right side of the center of the mounting base. The shaping module is mounted on the lower end of the mounting base, and the herringbone frame is mounted on the lower end of the shaping module. The cooling module is mounted on the lower end of the herringbone frame. This invention enables the cooling, shaping, compression, and welding of polyethylene film. The trapezoidal groove allows the guide rod to move continuously in a certain direction. The shaping unit, through the movement of the guide rod along the trapezoidal groove, continuously compresses, cools, vents, and welds the film, improving production efficiency.

Description

Technical Field

[0001] This application relates to the field of film production technology, and in particular to a cooling and shaping apparatus for the production of polyethylene film. Background Technology

[0002] PE film, also known as polyethylene film, refers to films made from polyethylene. Blown film is one of the methods for forming plastic films. The process involves melting and plasticizing resin using an extruder to extrude it into a thin-walled tube. Then, under the action of a traction device, the polymer, which has a good flow state at this time, is blown with compressed air to the required thickness. After cooling and shaping, it becomes a film. Before the film is wound onto the film roll, it must be cooled. Common cooling methods include introducing low-temperature gas while the blown film machine is inflating the film, or installing a fan to enhance cooling. However, these methods can only cool the film to a certain extent and affect the subsequent winding of the film.

[0003] In existing film cooling and shaping devices, such as Chinese Patent No. CN218196411U, a cooling device for blown film production is disclosed. Specifically, it includes a spray ring pipe and two symmetrically placed plates. The two plates form a figure-eight structure. The interior of each plate is set with a cavity and the upper side is set with an open structure. Cooling liquid is placed in the cavity. The spray ring pipe is installed below the plates and is connected to the cooling liquid in the plates through a liquid pump. The cooling liquid is sprayed from the spray ring pipe onto the film. The rising film is cleaned of the cooling liquid on its outer wall by the action of the drive roller and the absorbent cotton. Under the action of the extrusion protrusion, the cooling liquid is detached from the absorbent cotton and falls into the cavity of the plate.

[0004] While the aforementioned existing technologies can achieve the function of cooling and shaping polyethylene films, firstly, the use of coolant directly sprayed onto the film during cooling can cause a rapid drop in film temperature, affecting quality issues such as tensile strength and resulting in poor film performance during use; secondly, the bolt-fixing method used in the aforementioned existing technologies may loosen after a period of use, leading to poor clamping and the presence of air within the film, which can affect subsequent winding. Therefore, there is room for improvement in the existing film cooling technologies. Summary of the Invention

[0005] In order to achieve the functions of cooling, shaping, and compression welding of polyethylene film, this application provides a cooling and shaping device for polyethylene film production.

[0006] The cooling and shaping device for polyethylene film production provided in this application adopts the following technical solution:

[0007] A cooling and shaping device for polyethylene film production includes a mounting base, guide rollers, a shaping module, a herringbone frame, and a cooling module. The mounting base has a Z-shaped cross-section, with bolt holes evenly distributed on the upper surface of the mounting base. Guide rollers are evenly installed on the right side of the middle part of the mounting base. A shaping module is installed at the lower end of the mounting base, and a herringbone frame is installed at the lower end of the shaping module. A cooling module is installed at the lower end of the herringbone frame.

[0008] The shaping module includes a connecting frame, a guide unit, a return plate, a lifting unit, and a shaping unit. The connecting frame is symmetrically installed at the lower end of the mounting base. The guide unit is installed on the inner side of the connecting frame. The return plate is installed at the lower end of the connecting frame. A feed port is provided in the middle of the return plate. The lifting unit is symmetrically installed at the lower end of the mounting base. The lifting unit is located inside the guide unit. The shaping unit is slidably connected to the lower end of the lifting unit. The shaping unit is connected to the guide unit.

[0009] The cooling module includes a cooling rack, a water inlet, a water outlet, an air intake fan, a water inlet pipe, a water outlet pipe, a wet curtain rack, and a filter pad. The cooling rack is installed at the lower end of the A-frame. The cooling rack has a rectangular hollow structure. The water inlet is installed at the upper end of the cooling rack, and the water outlet is installed at the lower end. Cylindrical grooves are evenly arranged on the cooling rack. An air intake fan is installed on the outside of the cylindrical grooves. An annular groove is arranged on the inside of the cooling rack. A water inlet pipe is installed at the upper end of the annular groove, and a water outlet pipe is installed at the lower end of the annular groove. A wet curtain rack is evenly arranged in the middle of the annular groove. The wet curtain rack is located inside the cylindrical groove. The upper end of the water inlet pipe is connected to the water inlet, and the lower end of the water inlet pipe is connected to the wet curtain rack. The lower end of the water outlet pipe is connected to the water outlet, and the upper end of the water outlet pipe is connected to the wet curtain rack. A filter pad is installed on the inside of the wet curtain rack.

[0010] Preferably, the guide unit includes a trapezoidal groove, a stop block, a telescopic spring, a guide rod, and a positioning plate. The inner side of the connecting frame is provided with a trapezoidal groove, and through grooves are symmetrically provided on the outer side of the trapezoidal groove. A stop block is slidably connected in the through groove, and a telescopic spring is installed between the stop block and the through groove. A guide rod is slidably connected in the trapezoidal groove, and a positioning plate is installed in the middle of the guide rod. The inner side of the positioning plate is installed on the shaping unit.

[0011] Preferably, the trapezoidal groove includes a straight groove a1, a straight groove a2, an inclined groove b1, and an inclined groove b2. The straight groove a1 is smoothly connected to the inclined grooves b1 and b2, respectively, and the straight groove a2 is smoothly connected to the inclined grooves b1 and b2, respectively.

[0012] Preferably, the lifting unit includes cylinders and a movable frame. Cylinders are evenly installed on the lower end face of the mounting base. A movable frame is installed between the top ends of the cylinders on the same side through a flange. A shaping unit is slidably connected to the lower end of the movable frame.

[0013] Preferably, the shaping unit includes a rectangular frame, a moving component, a welding component, and a coolant component. The lower end of the lifting unit is slidably connected to the rectangular frame. Grooves are symmetrically arranged at both ends of the inner side of the rectangular frame. The moving component is installed between the grooves. The welding component is installed in the middle of the moving component. A rectangular groove is provided in the middle of the inner side of the rectangular frame. The coolant component is installed in the rectangular groove.

[0014] Preferably, the moving component includes an electric slider, a U-shaped frame, and an extrusion plate. The electric slider is installed in the groove, the U-shaped frame is installed between the electric sliders, and the extrusion plate is installed at the lower end of the outer side of the U-shaped frame.

[0015] Preferably, the welding assembly includes a push rod, a rectangular plate, a welding plate, a return spring, and a pressing block. The moving assembly has a symmetrically arranged groove in the middle, and a push rod is slidably connected in the groove. A rectangular plate is installed between the outer ends of the push rod. A welding plate is installed on the outer surface of the rectangular plate. A return spring is installed on the outer side of the push rod. A pressing block is symmetrically installed on the inner side of the groove. A pressing groove is provided in the middle of the pressing block. The pressing groove cooperates with the push rod.

[0016] Preferably, the coolant assembly includes a sealing gasket made of a flexible material, the gasket being filled with coolant, and heat-conducting plates being uniformly installed on the outer surface of the gasket, with the inner side of the heat-conducting plates connected to the coolant.

[0017] Preferably, a herringbone frame is installed at the lower end of the herringbone plate, and rotating rollers are evenly installed on the inner side of the herringbone frame.

[0018] In summary, this application includes at least one of the following beneficial technical effects:

[0019] In this invention, a guiding unit is provided. The trapezoidal groove allows the guide rod to move continuously in a certain direction. The shaping unit can continuously press, cool, vent, and weld the film by moving the guide rod along the trapezoidal groove, thereby improving production efficiency.

[0020] In this invention, a moving component is provided. When the guide rod moves along the straight groove a2, the welding point on the film just moves to the lower end of the extrusion plate. This allows the gas in the film between the rectangular frames to be completely discharged when the extrusion plate moves downward, preventing the air left in the welding part from affecting the film winding.

[0021] In this invention, a cooling module is provided. Cooling water flows into the inlet pipe through the inlet. The cooling water in the inlet pipe flows through the wet curtain frame and collects in the outlet pipe. Finally, it flows out through the outlet. The air passing through the wet curtain frame comes into full contact with the cooling water. The cooled air can quickly and evenly cool the film, so that the cooled film reaches the required temperature. Furthermore, using low-temperature air for cooling can maintain the physical properties of the film and prevent the film temperature from dropping suddenly and affecting the film's performance. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Figure 1 This is a three-dimensional structural diagram of this application.

[0024] Figure 2 This is a schematic diagram of the first cross-sectional structure of this application.

[0025] Figure 3 This is a schematic diagram of the second cross-sectional structure of this application.

[0026] Figure 4 This is a schematic diagram of the third cross-sectional structure of this application.

[0027] Figure 5 This is a three-dimensional structural diagram of the mounting base, guide roller, and shaping module of this application.

[0028] Figure 6 This is a schematic cross-sectional view of the standardized module structure of this application.

[0029] Figure 7 This is a cross-sectional structural diagram of the connecting frame, trapezoidal groove, stop block and telescopic spring of this application.

[0030] Figure 8 This is a schematic diagram of the cross-sectional structure of the standard unit in this application.

[0031] Figure 9 This is a schematic diagram of the first cross-sectional structure of the cooling module of this application.

[0032] Figure 10 This is a cross-sectional structural diagram of the cooling rack, water inlet, water outlet, water inlet pipe, water outlet pipe and wet curtain rack of this application.

[0033] Explanation of reference numerals in the attached drawings: 1. Mounting base; 2. Guide roller; 3. Shaping module; 31. Connecting frame; 32. Guide unit; 321. Trapezoidal groove; 322. Stop block; 323. Telescopic spring; 324. Guide rod; 325. Positioning plate; 33. Reverse plate; 34. Lifting unit; 341. Cylinder; 342. Moving frame; 35. Shaping unit; 351. Rectangular frame; 352. Moving assembly; 3521. Electric slider; 3522. U-shaped frame; 35 23. Extrusion plate; 353. Welding assembly; 3531. Push rod; 3532. Rectangular plate; 3533. Welding plate; 3534. Return spring; 3535. Extrusion block; 354. Coolant assembly; 3541. Sealing gasket; 4. A-frame; 41. Rotating roller; 5. Cooling module; 51. Cooling rack; 52. Water inlet; 53. Water outlet; 54. Air intake fan; 55. Water inlet pipe; 56. Water outlet pipe; 57. Wet curtain rack; 58. Filter pad. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 1-10 This application will be described in further detail.

[0035] This application discloses a cooling and shaping device for polyethylene film production, which can realize the functions of cooling and shaping polyethylene film and compression welding.

[0036] Reference Figure 1 As shown in the figure, a cooling and shaping device for polyethylene film production disclosed in this embodiment includes a mounting base 1, a guide roller 2, a shaping module 3, a herringbone frame 4, and a cooling module 5. The mounting base 1 has a Z-shaped cross-section. Bolt holes are evenly arranged on the upper surface of the mounting base 1. The guide roller 2 is evenly installed on the right side of the middle part of the mounting base 1. The shaping module 3 is installed at the lower end of the mounting base 1. The herringbone frame 4 is installed at the lower end of the shaping module 3. The cooling module 5 is installed at the lower end of the herringbone frame 4.

[0037] Reference Figure 5 As shown, the shaping module 3 includes a connecting frame 31, a guide unit 32, a shaped plate 33, a lifting unit 34, and a shaping unit 35. The connecting frame 31 is symmetrically installed at the lower end of the mounting base 1. The guide unit 32 is installed on the inner side of the connecting frame 31. The shaped plate 33 is installed at the lower end of the connecting frame 31. A feed port is provided in the middle of the shaped plate 33. The lifting unit 34 is symmetrically installed at the lower end of the mounting base 1. The lifting unit 34 is located inside the guide unit 32. The shaping unit 35 is slidably connected to the lower end of the lifting unit 34. The shaping unit 35 is connected to the guide unit 32.

[0038] In actual use, when the lifting unit 34 drives the shaping unit 35 to move upward, the shaping unit 35 extends inward through the guide unit 32 to press, cool, and vent the film and weld it.

[0039] Reference Figure 6 As shown, the guide unit 32 includes a trapezoidal groove 321, a stop block 322, a telescopic spring 323, a guide rod 324, and a positioning plate 325. The inner side of the connecting frame 31 is provided with a trapezoidal groove 321, and through grooves are symmetrically provided on the outer side of the trapezoidal groove 321. The stop block 322 is slidably connected in the through groove, and a telescopic spring 323 is installed between the stop block 322 and the through groove. The guide rod 324 is slidably connected in the trapezoidal groove 321, and the positioning plate 325 is installed in the middle of the guide rod 324. The inner side of the positioning plate 325 is installed on the shaping unit 35.

[0040] In actual use, when the guide rod 324 moves to the highest point in the trapezoidal groove 321, the telescopic spring 323 drives the stop block 322 to reset and block the guide rod 324, allowing the guide rod 324 to continue moving in the previous direction. When the guide rod 324 moves to the lowest point in the trapezoidal groove 321, the guide rod 324 gradually contacts and presses against one side of the stop block 322, causing the stop block 322 to retract into the groove. At this time, the telescopic spring 323 is in a compressed state. When the guide rod 324 moves to the lowest point in the trapezoidal groove 321, the telescopic spring 323 drives the stop block 322 to reset and block the guide rod 324, allowing the guide rod 324 to continue moving in the previous direction. The trapezoidal groove 321 allows the guide rod 324 to move continuously in a certain direction. The shaping unit 35 can continuously press, cool, vent, and weld the film by moving the guide rod 324 along the trapezoidal groove 321, thus improving production efficiency.

[0041] Reference Figure 7 As shown, the trapezoidal groove 321 includes a straight groove a1, a straight groove a2, an inclined groove b1 and an inclined groove b2. The straight groove a1 is smoothly connected to the inclined grooves b1 and b2 respectively, and the straight groove a2 is smoothly connected to the inclined grooves b1 and b2 respectively.

[0042] In actual use, when the shaping unit 35 moves upward, the guide rod 324 moves sequentially along the inclined groove b1, the straight groove a2, and the inclined groove b2; when the guide rod 324 moves along the inclined groove b1, the shaping unit 35 squeezes the film and moves upward, at which time the shaping unit 35 discharges most of the gas in the film downward; when the guide rod 324 moves along the straight groove a2, the shaping unit 35 completely discharges the remaining gas in the film and welds the film; when the guide rod 324 moves along the inclined groove b2, the shaping unit 35 separates from the film and resets; when the shaping unit 35 moves downward, the guide rod 324 moves along the straight groove a1.

[0043] Reference Figure 6 As shown, the lifting unit 34 includes a cylinder 341 and a movable frame 342. Cylinders 341 are evenly installed on the lower end surface of the mounting base 1. The movable frame 342 is installed between the top ends of the cylinders 341 on the same side through a flange. The lower end of the movable frame 342 is slidably connected to a shaping unit 35.

[0044] In actual use, when the cylinder 341 drives the moving frame 342 to rise or fall, the shaping unit 35 moves in the trapezoidal groove 321 through the guide rod 324 to move closer or further away from each other. When the shaping unit 35 moves vertically upward, it is in a state of synchronous movement with the film.

[0045] Reference Figure 8As shown, the shaping unit 35 includes a rectangular frame 351, a moving component 352, a welding component 353, and a coolant component 354. The lower end of the lifting unit 34 is slidably connected to the rectangular frame 351. The inner side of the rectangular frame 351 has grooves symmetrically arranged at both ends. The moving component 352 is installed between the grooves. The welding component 353 is installed in the middle of the moving component 352. The inner side of the rectangular frame 351 has a rectangular groove in the middle. The coolant component 354 is installed in the rectangular groove.

[0046] In actual use, when the guide rod 324 moves along the inclined groove b1, the two rectangular frames 351 gradually approach each other and compress the film; when the guide rod 324 moves along the straight groove a2, the coolant assembly 354 cools the film, the moving assembly 352 drives the welding assembly 353 to move downward and completely discharge the gas in the film downward, and then the welding assembly 353 extends and welds the pressed film; when the guide rod 324 moves along the inclined groove b2, the two rectangular frames 351 first gradually separate, and then the moving assembly 352 drives the welding assembly 353 to reset; when the guide rod 324 moves along the straight groove a2, the rectangular frames 351 move downward.

[0047] It should be noted that after the welding assembly 353 finishes welding the film, the two rectangular frames 351 gradually move away from each other, causing the two welding assemblies 353 to separate. Then the welding assembly 353 resets to prevent damage to the film from being caused by resetting immediately after welding.

[0048] Reference Figure 8 As shown, the moving component 352 includes an electric slider 3521, a U-shaped frame 3522 and an extrusion plate 3523. The electric slider 3521 is installed in the groove, the U-shaped frame 3522 is installed between the electric sliders 3521, and the extrusion plate 3523 is installed at the lower end of the outer side of the U-shaped frame 3522.

[0049] In actual use, when the guide rod 324 moves along the inclined groove b1, the extrusion plate 3523 gradually extrudes the film; when the guide rod 324 moves to the junction of the inclined groove b1 and the straight groove a2, the two extrusion plates 352 completely press the film together. Then, the guide rod 324 moves along the straight groove a2, and the electric slider 3521 drives the U-shaped frame 3522 to move downward. The extrusion plate 3523 moves downward synchronously with the U-shaped frame 3522. During the downward movement of the extrusion plate 3523, the gas in the film located between the rectangular frames 351 is completely discharged downward. When the guide rod 324 moves along the inclined groove b2, the two rectangular frames 351 gradually move away from each other, causing the two welding components 353 to separate. Then, the electric slider 3521 drives the U-shaped frame 3522 to move upward and reset. At the same time, the welding components 353 reset.

[0050] It should be noted that when the guide rod 324 moves along the straight groove a2, the welding point on the film just moves to the lower end of the extrusion plate 3523, so that when the extrusion plate 3523 moves downward, the gas in the film between the rectangular frames 351 can be completely discharged, preventing the air left in the welding part from affecting the film winding.

[0051] Reference Figure 8 As shown, the welding assembly 353 includes a push rod 3531, a rectangular plate 3532, a welding plate 3533, a return spring 3534, and a pressing block 3535. The moving assembly 352 has a symmetrically arranged groove in the middle, and the push rod 3531 is slidably connected in the groove. The rectangular plate 3532 is installed between the outer ends of the push rod 3531. The welding plate 3533 is installed on the outer surface of the rectangular plate 3532. The return spring 3534 is installed on the outer side of the push rod 3531. The pressing block 3535 is symmetrically installed on the inner side of the groove. The pressing block 3535 has a pressing groove in the middle, and the pressing groove cooperates with the push rod 3531.

[0052] In actual use, when the electric slider 3521 drives the U-shaped frame 3522 to move downward, the end of the push rod 3531 moves along the extrusion groove and gradually extends, and the return spring 3534 gradually stretches. When the electric slider 3521 moves to the bottom of the groove, the push rod 3531 also moves to the bottom of the extrusion groove. At this time, the two welding plates 3533 come into contact and are energized to weld the pressed film. After the welding is completed, the two rectangular frames 351 gradually move away from each other. Then, the electric slider 3521 drives the U-shaped frame 3522 to move upward, and the return spring 3534 drives the push rod 3531 to move into the rectangular frame 351. The welding plate 3533 and the rectangular plate 3532 gradually return to their original positions.

[0053] Reference Figure 8 As shown, the coolant assembly 354 includes a sealing gasket 3541, which is made of a flexible material and is filled with coolant. Heat-conducting sheets are uniformly installed on the outer surface of the sealing gasket 3541, and the inner side of the heat-conducting sheets is connected to the coolant.

[0054] In actual use, when the guide rod 324 moves along the straight groove a2, the sealing gasket 3541 is always in contact with the film. The electric slider 3521 drives the U-shaped frame 3522 to move downward. The U-shaped frame 3522 squeezes the sealing gasket 3541, causing the sealing gasket 3541 to deform and shrink. This does not interfere with the movement of the U-shaped frame 3522. When the sealing gasket 3541 is in contact with the film, the heat inside the film is transferred to the coolant through the heat-conducting sheet, achieving complete cooling of the film, which is beneficial for subsequent winding.

[0055] Reference Figure 4 As shown, a herringbone frame 4 is installed at the lower end of the herringbone plate 33, and rotating rollers 41 are evenly installed on the inner side of the herringbone frame 4.

[0056] In actual use, the A-frame 4 can play a role in limiting the compression of the film, which is beneficial for the subsequent pressing and degassing of the film by the shaping unit 35.

[0057] Reference Figure 9 As shown, the cooling module 5 includes a cooling rack 51, a water inlet 52, a water outlet 53, an air intake fan 54, a water inlet pipe 55, a water outlet pipe 56, a wet curtain rack 57, and a filter pad 58. The cooling rack 51 is installed at the lower end of the A-frame 4. The cooling rack 51 has a rectangular hollow structure. The water inlet 52 is installed at the upper end of the cooling rack 51, and the water outlet 53 is installed at the lower end of the cooling rack 51. Cylindrical grooves are evenly arranged on the cooling rack 51, and the air intake fan 54 is installed on the outside of the cylindrical grooves. An annular groove is provided on the inner side of 51. A water inlet pipe 55 is installed at the upper end of the annular groove, and a water outlet pipe 56 is installed at the lower end of the annular groove. A wet curtain rack 57 is evenly installed in the middle of the annular groove. The wet curtain rack 57 is located in the cylindrical groove. The upper end of the water inlet pipe 55 is connected to the water inlet 52, and the lower end of the water inlet pipe 55 is connected to the wet curtain rack 57. The lower end of the water outlet pipe 56 is connected to the water outlet 53, and the upper end of the water outlet pipe 56 is connected to the wet curtain rack 57. A filter pad 58 is installed on the inner side of the wet curtain rack 57.

[0058] In actual use, when the blown film moves upward from the middle of the cooling rack, the intake fan 54 draws in outside air into the cylindrical groove. Then the air passes through the wet curtain rack 57 to form low-temperature air. After being filtered by the filter pad 58, the low-temperature air comes into contact with the film and effectively cools the film. The filter pad 58 can filter water droplets in the low-temperature air to prevent water droplets from being blown onto the film.

[0059] It should be noted that cooling water flows into the inlet pipe 55 through the inlet 52. The cooling water in the inlet pipe 55 flows through the wet curtain rack 57 and collects in the outlet pipe 56. Finally, it flows out through the outlet 53. The air passing through the wet curtain rack 57 comes into full contact with the cooling water. The cooled air can cool the membrane evenly, so that the cooled membrane reaches the required temperature. Furthermore, using low-temperature air for cooling can maintain the physical properties of the membrane and prevent a sudden drop in membrane temperature from affecting the membrane's performance.

[0060] The implementation principle of this embodiment is as follows:

[0061] 1: Cooling and cooling. After the blown film moves upward from the middle of the cooling rack, the intake fan 54 draws in outside air into the cylindrical groove. Then the air passes through the wet curtain rack 57 to form low-temperature air. After being filtered by the filter pad 58, the low-temperature air comes into contact with the film and effectively cools the film. The filter pad 58 can filter water droplets in the low-temperature air to prevent water droplets from being blown onto the film.

[0062] 2: Pressing and venting, the guide rod 324 moves along the inclined groove b1, and the extrusion plate 3523 gradually extrudes the film. Then, the guide rod 324 moves along the straight groove a2, and the electric slider 3521 drives the U-shaped frame 3522 to move downward. The extrusion plate 3523 moves downward synchronously with the U-shaped frame 3522. During the downward movement of the extrusion plate 3523, the gas in the film located between the rectangular frames 351 is completely discharged downward. At the same time, the coolant assembly 354 cools the film again.

[0063] 3: Welding separation. The moving component 352 drives the welding component 353 to move downward. Then the welding component 353 extends and welds the pressed film. After welding is completed, the guide rod 324 moves along the inclined groove b2. First, the two rectangular frames 351 gradually separate. Then the moving component 352 drives the welding component 353 to reset.

[0064] The embodiments described herein are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A cooling and shaping device for polyethylene film production, comprising a mounting base (1), guide rollers (2), a shaping module (3), a herringbone frame (4), and a cooling module (5), characterized in that, The mounting base (1) has a Z-shaped cross-section. Bolt holes are evenly arranged on the upper surface of the mounting base (1). Guide rollers (2) are evenly installed on the right side of the middle part of the mounting base (1). A shaping module (3) is installed at the lower end of the mounting base (1). A truss frame (4) is installed at the lower end of the shaping module (3). A cooling module (5) is installed at the lower end of the truss frame (4). The shaping module (3) includes a connecting frame (31), a guide unit (32), a spiral plate (33), a lifting unit (34), and a shaping unit (35). The connecting frame (31) is symmetrically installed at the lower end of the mounting base (1). The guide unit (32) is installed on the inner side of the connecting frame (31). The spiral plate (33) is installed at the lower end of the connecting frame (31). The spiral plate (33) has a feed port in the middle. The lifting unit (34) is symmetrically installed at the lower end of the mounting base (1). The lifting unit (34) is located inside the guide unit (32). The shaping unit (35) is slidably connected to the lower end of the lifting unit (34). The shaping unit (35) is connected to the guide unit (32). When the lifting unit (34) drives the shaping unit (35) to move upward, the shaping unit (35) extends inward through the guide unit (32) and presses, cools, and vents the film, and welds the film. The guide unit (32) includes a trapezoidal groove (321), a stop (322), a telescopic spring (323), a guide rod (324), and a positioning plate (325). The inner side of the connecting frame (31) is provided with a trapezoidal groove (321), and a through groove is symmetrically provided on the outer side of the trapezoidal groove (321). The stop (322) is slidably connected in the through groove, and a telescopic spring (323) is installed between the stop (322) and the through groove. The guide rod (324) is slidably connected in the trapezoidal groove (321), and a positioning plate (325) is installed in the middle of the guide rod (324). The inner side of the positioning plate (325) is installed on the shaping unit (35). The trapezoidal groove (321) includes a straight groove a1, a straight groove a2, an inclined groove b1, and an inclined groove b2. The straight groove a1 is smoothly connected to the inclined grooves b1 and b2, respectively. The straight groove a2 is smoothly connected to the inclined grooves b1 and b2, respectively. When the shaping unit (35) moves upward, the guide rod (324) moves sequentially along the inclined grooves b1, a straight groove a2, and b2. When the guide rod (324) moves to the highest point in the trapezoidal groove (321), the telescopic spring (323) drives the stop block (322) to reset and block the guide rod (324), so that the guide rod (324) continues to move in the previous direction of movement. When the guide rod (324) moves to the lowest point in the trapezoidal groove (321), the telescopic spring (323) drives the stop block (322) to reset and block the guide rod (324), so that the guide rod (324) continues to move in the previous direction of movement. The lifting unit (34) includes a cylinder (341) and a moving frame (342). Cylinders (341) are evenly installed on the lower end surface of the mounting base (1). The moving frame (342) is installed between the top ends of the cylinders (341) on the same side through a flange. The lower end of the moving frame (342) is slidably connected to a shaping unit (35). The shaping unit (35) includes a rectangular frame (351), a moving component (352), a welding component (353), and a coolant component (354). The lower end of the lifting unit (34) is slidably connected to the rectangular frame (351). The inner side of the rectangular frame (351) has symmetrically arranged grooves at both ends. The moving component (352) is installed between the grooves. The welding component (353) is installed in the middle of the moving component (352). The inner side of the rectangular frame (351) has a rectangular groove in the middle. The coolant component (354) is installed in the rectangular groove. When the guide rod (324) moves along the inclined groove b1, the two rectangular frames (351) The guide rod (324) gradually approaches and squeezes the film; when the guide rod (324) moves along the straight groove a2, the coolant assembly (354) cools the film, the moving assembly (352) drives the welding assembly (353) to move downward and completely discharge the gas in the film downward, and then the welding assembly (353) extends and welds the pressed film; when the guide rod (324) moves along the inclined groove b2, the two rectangular frames (351) gradually separate first, and then the moving assembly (352) drives the welding assembly (353) to reset; when the guide rod (324) moves along the straight groove a2, the rectangular frame (351) moves downward.

2. The cooling and shaping device for polyethylene film production according to claim 1, characterized in that: The moving component (352) includes an electric slider (3521), a U-shaped frame (3522), and an extrusion plate (3523). The electric slider (3521) is installed in the groove, and the U-shaped frame (3522) is installed between the electric sliders (3521). The extrusion plate (3523) is installed on the lower end of the outer side of the U-shaped frame (3522). When the guide rod (324) moves along the inclined groove b1, the extrusion plate (3523) gradually extrudes the film. When the guide rod (324) moves to the junction of the inclined groove b1 and the straight groove a2, the two extrusion plates (3523) completely press the film. When moving along the straight groove a2, the electric slider (3521) drives the U-shaped frame (3522) to move downward, and the extrusion plate (3523) moves downward synchronously with the U-shaped frame (3522). During the downward movement of the extrusion plate (3523), the gas in the film located between the rectangular frames (351) is completely discharged downward. When the guide rod (324) moves along the inclined groove b2, firstly, the two rectangular frames (351) gradually move away, causing the two welding components (353) to separate. Then, the electric slider (3521) drives the U-shaped frame (3522) to move upward and reset. At the same time, the welding components (353) reset.

3. A cooling and shaping device for polyethylene film production according to claim 2, characterized in that: The welding assembly (353) includes a push rod (3531), a rectangular plate (3532), a welding plate (3533), a return spring (3534), and an extrusion block (3535). The moving assembly (352) has symmetrically arranged grooves in its center. A push rod (3531) is slidably connected within the grooves. A rectangular plate (3532) is installed between the outer ends of the push rod (3531). A welding plate (3533) is installed on the outer surface of the rectangular plate (3532). A return spring (3534) is installed on the outer side of the push rod (3531). Extrusion blocks (3535) are symmetrically installed on the inner side of the grooves. An extrusion groove is provided in the center of each extrusion block (3535). The extrusion groove cooperates with the push rod (3531). When the electric slider... When the U-shaped frame (3522) moves downward, the end of the push rod (3531) moves along the extrusion groove and gradually extends, and the return spring (3534) gradually stretches. When the electric slider (3521) moves to the bottom of the groove, the push rod (3531) also moves to the bottom of the extrusion groove. The two welding plates (3533) come into contact and are energized to weld the pressed film. After the welding is completed, the two rectangular frames (351) gradually move away from each other. Then the electric slider (3521) drives the U-shaped frame (3522) to move upward. The return spring (3534) drives the push rod (3531) to move into the rectangular frame (351). The welding plate (3533) and the rectangular plate (3532) gradually return to their original positions.

4. A cooling and shaping device for polyethylene film production according to claim 3, characterized in that: The coolant assembly (354) includes a gasket (3541) made of flexible material. The gasket (3541) is filled with coolant. Heat-conducting sheets are uniformly installed on the outer surface of the gasket (3541), and the inner side of the heat-conducting sheets is connected to the coolant.

5. A cooling and shaping device for polyethylene film production according to claim 1, characterized in that: The lower end of the herringbone plate (33) is fitted with an A-frame (4), and rotating rollers (41) are evenly installed on the inner side of the A-frame (4).

6. A cooling and shaping device for polyethylene film production according to claim 1, characterized in that: The cooling module (5) includes a cooling rack (51), a water inlet (52), a water outlet (53), an air intake fan (54), a water inlet pipe (55), a water outlet pipe (56), a wet curtain rack (57), and a filter pad (58). The cooling rack (51) is installed at the lower end of the A-frame (4). The cooling rack (51) has a rectangular hollow structure. The water inlet (52) is installed at the upper end of the cooling rack (51), and the water outlet (53) is installed at the lower end of the cooling rack (51). Cylindrical grooves are evenly arranged on the cooling rack (51), and an air intake fan (54) is installed on the outside of the cylindrical grooves. An annular groove is provided on the inner side of the cooling rack (51). An inlet pipe (55) is installed at the upper end of the annular groove, and an outlet pipe (56) is installed at the lower end of the annular groove. A wet curtain rack (57) is evenly installed in the middle of the annular groove. The wet curtain rack (57) is located in the cylindrical groove. The upper end of the inlet pipe (55) is connected to the inlet (52), and the lower end of the inlet pipe (55) is connected to the wet curtain rack (57). The lower end of the outlet pipe (56) is connected to the outlet (53), and the upper end of the outlet pipe (56) is connected to the wet curtain rack (57). A filter pad (58) is installed on the inner side of the wet curtain rack (57).

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