Blow molding device for PE film processing and blow molding process thereof

Abstract

The invention relates to the technical field of blow molding devices, and discloses a blow molding device for PE film processing and a blow molding process thereof.The blow molding device comprises a supporting frame and a first fixing plate arranged on the right side of the supporting frame, the blow molding device is arranged on the supporting frame, and the blow molding device further comprises an adjusting part installed on the supporting frame; the number of the traction parts is two, and the two traction parts are both arranged on the first fixing plate; the guide part is mounted on the fixed plate I; the adjusting part comprises a transmission assembly, and the transmission assembly is arranged on the supporting frame; and a plurality of extrusion assemblies are arranged. By arranging the adjusting part, the problems that in the using process of an existing blow molding device, fine adaptation is difficult to conduct according to the material hardness and the thickness specification of a PE film, excessive adjustment is likely to occur, the extrusion force is too large, and the film is excessively stretched, longitudinally deformed, thinned and even torn in the traction process are solved.

Description

Technical Field

[0001] This invention relates to the field of blow molding equipment technology, specifically to blow molding equipment and blow molding process for PE film processing. Background Technology

[0002] With the increasing demands for diverse specifications and stable performance of PE films in packaging, agriculture, and industry, traditional technologies are struggling to meet the production needs of films with varying thicknesses and widths, resulting in low production efficiency and product qualification rates. Against this backdrop, modern blow molding technology is developing towards precision and automation. By optimizing the device structure and process parameter control logic, it addresses the pain points of poor adaptability and difficulty in quality control of traditional equipment, thereby meeting the market demand for high-quality, multi-specification PE films.

[0003] However, existing blow molding equipment is difficult to precisely adapt to the material hardness and thickness specifications of PE film during use. It is easy to over-adjust, resulting in excessive extrusion pressure, which causes the film to be overstretched during traction, resulting in longitudinal deformation, thinning, or even tearing. Summary of the Invention

[0004] The purpose of this invention is to provide a blow molding device and a blow molding process for PE film processing. By setting an adjustment part, the invention solves the problem that existing blow molding devices are difficult to precisely adapt to the material hardness and thickness specifications of PE film during use, and are prone to over-adjustment leading to excessive extrusion pressure, causing the film to be overstretched during traction, resulting in longitudinal deformation, thinning, or even tearing.

[0005] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution:

[0006] This invention relates to a blow molding device and its blow molding process for PE film processing. It includes a support frame and a fixed plate (first) disposed on the right side of the support frame. The blow molding device is mounted on the support frame. The device further includes: an adjustment unit mounted on the support frame; two traction units, each mounted on the fixed plate (first); a guide unit mounted on the fixed plate (first); the adjustment unit includes a transmission assembly mounted on the support frame; and several extrusion assemblies mounted on the support frame. The transmission assembly includes a fixed plate (second) fixedly connected to the top of the support frame. Two sliding grooves are formed on the fixed plate (second). An auxiliary roller is rotatably connected to the fixed plate (second). Several sliders (first) are slidably connected to the inner walls of the sliding grooves. Two rotating shafts (first) are disposed between the sliders (first). Each rotating shaft (first) is rotatably connected to a slider (first). Extrusion rollers are fixedly connected to the outer walls of each rotating shaft (first), and the two extrusion rollers are in contact with each other.

[0007] Furthermore, the traction unit includes a pulling assembly mounted on a fixed plate; and a resistance assembly disposed on the fixed plate, with the pulling assembly located inside the fixed plate and the resistance assembly located on the front side of the fixed plate.

[0008] Furthermore, the guide portion includes a sliding assembly disposed on a fixed plate; and an auxiliary component mounted on the fixed plate.

[0009] Furthermore, the extrusion assembly includes a threaded rod 1 threadedly connected to a fixed plate 2, a slider 2 rotatably connected to the left side of the threaded rod 1, a spring 1 fixedly connected to the left side of the slider 2, the left side of the spring 1 fixedly connected to the slider 1, a handle 1 fixedly connected to the right side of the threaded rod 1, and the slider 2 extending outside the groove.

[0010] Furthermore, the pulling assembly includes a second rotating shaft rotatably connected to a first fixed plate. A friction roller is fixedly connected to the outer wall of the second rotating shaft, and a ratchet is fixedly connected to the outer wall of the second rotating shaft. An adapter plate is provided on the front side of the ratchet, and the adapter plate is adapted to the ratchet. A winding member is provided on the first fixed plate, and the adapter plate meshes with the teeth on the ratchet. The winding member includes a third rotating shaft rotatably connected to the inner wall of the first fixed plate. The front side of the third rotating shaft extends to the outside of the first fixed plate, and a winding roller is fixedly connected to the outer wall of the third rotating shaft. A motor bracket is fixedly connected to the front side of the first fixed plate, and a motor is fixedly connected to the inner wall of the motor bracket. The output shaft of the motor is fixedly connected to the third rotating shaft via a coupling, and the motor is fixed to the first fixed plate via the motor bracket.

[0011] Furthermore, the resistance assembly includes a threaded rod 2 rotatably connected to the front side of a fixed plate 1. Several sliding rods are fixedly connected to the front side of the fixed plate 1. A connecting plate is threadedly connected to the outer wall of the threaded rod 2. A spring 2 is fixedly connected to the rear side of the connecting plate. The rear side of the spring 2 is fixedly connected to an adapter plate. The initial state of the spring 2 is a compressed state.

[0012] Furthermore, the sliding assembly includes a bidirectional threaded rod rotatably connected to the inner wall of a fixed plate, the front side of the bidirectional threaded rod extending to the outside of the fixed plate, and two sliding plates threadedly connected to the outer wall of the bidirectional threaded rod. A guide plate is fixedly connected to the top of each of the two sliding plates, and a handle is fixedly connected to the front side of the bidirectional threaded rod. The two sliding plates and the two guide plates are arranged in a mirror image.

[0013] Furthermore, the auxiliary component includes several sliding rods three passing through the two slide plates. The several sliding rods three are all fixedly connected to the fixed plate one. The outer wall of the bidirectional threaded rod is fitted with several telescopic sleeves. The front and rear sides of the telescopic sleeve located in the middle are fixedly connected to the two slide plates respectively. The sides of the two telescopic sleeves located on the front and rear sides that are close to each other are fixedly connected to the two slide plates respectively. The sides of the two telescopic sleeves located on the front and rear sides that are far apart from each other are fixedly connected to the fixed plate one. The telescopic sleeves will contract as the slide plates move.

[0014] The present invention has the following beneficial effects:

[0015] 1. This invention uses an adjustment unit with handle one as the operation input. Rotating handle one drives threaded rod one to rotate synchronously. Utilizing the linear conversion characteristics of threaded transmission, the rotational motion is converted into a horizontal leftward displacement of slider two. During the movement of slider two, spring one is pushed, and the elastic force of spring one drives slider one to move synchronously until the extrusion roller driven by slider one contacts the fixed extrusion roller on the other side. Continuing to rotate handle one can further compress spring one. By changing the amount of spring compression, the extrusion pressure can be adjusted in a stepwise manner, ultimately achieving precise control of the extrusion pressure between the two extrusion rollers. This avoids problems such as film stretching and deformation due to excessive extrusion pressure, or poor film bubble sealing and air leakage due to insufficient extrusion pressure, significantly improving the versatility of multi-specification film production.

[0016] 2. This invention utilizes a traction unit with the threaded rod II as the adjustment core. When the threaded rod II rotates, it slides linearly along the slide bar, causing the connecting plate to move synchronously. The connecting plate presses the spring II backward, causing the spring II to undergo elastic deformation and generate a thrust pointing towards the adapter plate. This thrust drives the adapter plate to fit tightly against the ratchet. As the threaded rod II continues to rotate, the compression of the spring II gradually increases, and the squeezing force between the adapter plate and the ratchet increases synchronously, thereby increasing the damping resistance when the rotating shaft II drives the friction roller to rotate. Through the adjustable characteristics of the damping resistance, precise control of the film winding tension is indirectly achieved, which can match the winding requirements of PE films of different materials and thicknesses. This avoids problems such as film stretching deformation and edge tearing due to excessive tension, or loose winding, interlayer displacement, and air bubbles due to insufficient tension, significantly improving the flatness and density of the wound film.

[0017] 3. This invention uses a guide section and a handle two as the operation input end. When the handle two is rotated, it drives the bidirectional threaded rod to rotate synchronously. Utilizing the transmission characteristics of the reverse threads at both ends of the bidirectional threaded rod, the rotational motion is converted into the linear displacement of the two slide plates, causing the two slide plates to synchronously move closer or further apart along the axis of the threaded rod. Since the guide plate is fixedly connected to the slide plate, the displacement of the slide plate directly drives the two guide plates to synchronously adjust the spacing, ultimately achieving the effect of precisely controlling the spacing of the guide plates according to the film size. It can adapt to PE films of different widths and ensures that the film always runs along the central axis during traction and winding, effectively preventing film edge wear, deviation, or wrinkles.

[0018] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a partial cross-sectional view of the adjustment section of the present invention;

[0022] Figure 3 This is a partial cross-sectional view of the traction section of the present invention;

[0023] Figure 4 This is a partial cross-sectional view of the tension component of the present invention;

[0024] Figure 5 This is a partial structural schematic diagram of the adapter plate of the present invention;

[0025] Figure 6 This is a partial cross-sectional view of the guide portion of the present invention;

[0026] Figure 7 For the present invention Figure 3 A magnified structural diagram of A in the middle.

[0027] The attached diagram lists the components represented by each number as follows:

[0028] In the diagram: 111, Support frame; 112, Fixing plate one; 113, Blow molding device; 2, Adjustment unit; 21, Transmission assembly; 211, Fixing plate two; 212, Slide groove; 213, Auxiliary roller; 214, Slider one; 215, Rotating shaft one; 216, Extrusion roller; 22, Extrusion assembly; 221, Threaded rod one; 222, Slider two; 223, Spring one; 224, Handle one; 3, Traction unit; 31, Pulling assembly; 311, Rotating shaft two; 312, Friction rod. 313. Wiping roller; 314. Ratchet; 315. Adapter plate; 316. Rotating shaft three; 317. Take-up roller; 318. Motor bracket; 319. Motor; 32. Resistance assembly; 321. Threaded rod two; 322. Slide rod; 323. Connecting plate; 324. Spring two; 4. Guide part; 41. Sliding assembly; 411. Bidirectional threaded rod; 412. Slide plate; 413. Guide plate; 414. Handle two; 42. Auxiliary parts; 421. Slide rod three; 422. Telescopic sleeve. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Please see Figure 1 - Figure 7 As shown, the present invention is a blow molding device and blow molding process for PE film processing, including a support frame 111 and a fixing plate 112 disposed on the right side of the support frame 111. A blow molding device 113 is disposed on the support frame 111. The device also includes: an adjustment part 2, which is mounted on the support frame 111; two traction parts 3, both of which are disposed on the fixing plate 112; and a guide part 4, which is mounted on the fixing plate 112.

[0031] The adjusting unit 2 includes a transmission assembly 21, which is mounted on the support frame 111; and several extrusion assemblies 22, all of which are mounted on the support frame 111. The transmission assembly 21 includes a fixed plate 211 fixedly connected to the top of the support frame 111. Two grooves 212 are formed on the fixed plate 211. An auxiliary roller 213 is rotatably connected to the fixed plate 211. Several sliders 214 are slidably connected to the inner wall of the grooves 212. Two rotating shafts 215 are arranged between the sliders 214, and each rotating shaft 215 is rotatably connected to one of the sliders 214. The outer walls of the two rotating shafts 215... Both are fixedly connected to an extrusion roller 216, and the two extrusion rollers 216 are in contact with each other. The extrusion assembly 22 includes a threaded rod 221 threadedly connected to a fixed plate 211. A slider 222 is rotatably connected to the left side of the threaded rod 221. A spring 223 is fixedly connected to the left side of the slider 222. The left side of the spring 223 is fixedly connected to the slider 214. A handle 224 is fixedly connected to the right side of the threaded rod 221. The slider 222 extends outside the groove 212. By setting the adjustment part 2, the film stretching and deformation caused by excessive extrusion pressure or the film bubble not sealing properly and air leakage caused by insufficient extrusion pressure are avoided, which significantly improves the versatility of multi-specification film production.

[0032] The traction unit 3 includes a pulling assembly 31, which is mounted on a fixed plate 112; and a resistance assembly 32, which is disposed on the fixed plate 112. The pulling assembly 31 is located inside the fixed plate 112, and the resistance assembly 32 is located on the front side of the fixed plate 112. The pulling assembly 31 includes a second rotating shaft 311 rotatably connected to the fixed plate 112. A friction roller 312 is fixedly connected to the outer wall of the second rotating shaft 311, and a ratchet 313 is fixedly connected to the outer wall of the second rotating shaft 311. An adapter plate 314 is disposed on the front side of the ratchet 313 and is adapted to the ratchet 313. A winding member is disposed on the fixed plate 112, and the adapter plate 314 meshes with the teeth on the ratchet 313. The winding member includes a third rotating shaft 315 rotatably connected to the inner wall of the fixed plate 112, and the front side of the third rotating shaft 315 extends to the outer side of the fixed plate 112. A winding roller 316 is fixedly connected to the outer wall of the rotating shaft 315. A motor bracket 317 is fixedly connected to the front side of the fixed plate 112. A motor 318 is fixedly connected to the inner wall of the motor bracket 317. The output shaft of the motor 318 is fixedly connected to the rotating shaft 315 via a coupling. The motor 318 is fixed to the fixed plate 112 via the motor bracket 317. The resistance component 32 includes a threaded rod 321 rotatably connected to the front side of the fixed plate 112. Several sliding rods 322 are fixedly connected to the front side of the fixed plate 112. A connecting plate 323 is threadedly connected to the outer wall of the threaded rod 321. A spring 324 is fixedly connected to the rear side of the connecting plate 323. The rear side of the spring 324 is fixedly connected to the adapter plate 314. The initial state of the spring 324 is a compressed state. By setting the traction part 3, it can match PE materials of different materials and thicknesses. To meet the requirements of film winding, avoid problems such as film stretching and deformation, edge tearing caused by excessive tension, or loose winding, interlayer displacement, and air bubbles caused by insufficient tension, significantly improve the flatness and density of the film after winding.

[0033] The guide part 4 includes a sliding assembly 41, which is disposed on the fixed plate 112; and an auxiliary part 42, which is mounted on the fixed plate 112. The sliding assembly 41 includes a bidirectional threaded rod 411 rotatably connected to the inner wall of the fixed plate 112. The front side of the bidirectional threaded rod 411 extends to the outside of the fixed plate 112. Two sliding plates 412 are threadedly connected to the outer wall of the bidirectional threaded rod 411. Guide plates 413 are fixedly connected to the top of each of the two sliding plates 412. A handle 414 is fixedly connected to the front side of the bidirectional threaded rod 411. The two sliding plates 412 and the two guide plates 413 are mirror images of each other. The auxiliary part 42 includes a through-hole... Several sliding rods 421 on the slide plate 412 are fixedly connected to the fixed plate 112. Several telescopic sleeves 422 are sleeved on the outer wall of the bidirectional threaded rod 411. The front and rear sides of the telescopic sleeve 422 located in the middle are fixedly connected to the two slide plates 412 respectively. The sides of the two telescopic sleeves 422 located on the front and rear sides that are close to each other are fixedly connected to the two slide plates 412 respectively. The sides of the two telescopic sleeves 422 located on the front and rear sides that are far apart from each other are fixedly connected to the fixed plate 112. The telescopic sleeves 422 will contract as the slide plate 412 moves. By setting the guide part 4, it can adapt to PE films of different widths and specifications, so that the film always runs along the central axis during the traction and winding process, effectively preventing the film edge wear, deviation or wrinkles.

[0034] The blow molding device 113 is an SJ-C series, suitable for blow molding of raw materials such as HDPE, LDPE, and LLDPE. It can produce packaging films of different widths and thicknesses, from small packaging bags to medium-sized industrial films.

[0035] It should be noted that the control of the blow molding device 113 and the motor 318 in this application can both be achieved by using a program set in the control panel and inputting relevant parameters as needed for automated control. This control method can be achieved using existing technologies, such as PLC.

[0036] In use, first adjust the extrusion pressure of the two extrusion rollers 216 according to the required film thickness and material. During adjustment, turn handle 224. Handle 224 will then rotate along with threaded rod 221. As threaded rod 221 rotates, it pushes slider 222 to the left. As slider 222 is pushed, spring 223 pushes slider 214 to the left. After the two extrusion rollers 216 contact, continue turning handle 224. This will compress spring 223, causing the two extrusion rollers to... The increased pressure between the two extrusion rollers 216 allows for adjustment of the pressure between them. Subsequently, adjusting the resistance of the rotational connection between the two friction rollers 312 allows for adjustment of the tension during film winding. During adjustment, rotating the threaded rod 321 causes it to slide on the slide rod 322. As the connecting plate 323 slides, it pushes the spring 324 backward. The spring 324 then exerts a certain thrust on the adapter plate 314. As the pressure between the adapter plate 314 and the ratchet 313 increases, the resistance when the rotating shaft 311 rotates will also be greater, thereby achieving the effect of adjusting the film tension during winding. Then, the distance between the two guide plates 413 is adjusted according to the size of the film. When adjusting, the handle 414 is turned, and the bidirectional threaded rod 411 will rotate. When the bidirectional threaded rod 411 rotates, it will cause the two slide plates 412 to move away from or towards each other through the threads. At this time, the guide plates 413 will also move closer or further apart, thereby achieving the effect of adjusting the distance between the two guide plates 413. After the adjustment is completed, the film blown by the blow molding device 113 is pulled and placed between the two extrusion rollers 216. Then, the film is wrapped around the auxiliary roller 213 and caught between the two friction rollers 312. Then, the film is wrapped around the auxiliary roller on the fixing plate 112, passed through the two guide plates 413, and wound around the winding roller 316. Then, the motor 318 on the motor bracket 317 is started, and the winding roller 316 will rotate to wind up the film.

[0037] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A blow molding apparatus for PE film processing, comprising a support frame (111) and a fixing plate (112) disposed on the right side of the support frame (111), wherein a blow molding device (113) is disposed on the support frame (111), characterized in that, Also includes: Adjustment part (2), said adjustment part (2) is mounted on support frame (111); Two traction units (3) are provided, and both traction units (3) are provided on the fixing plate (112); Guide part (4), said guide part (4) is mounted on fixed plate one (112); The adjustment unit (2) includes a transmission component (21), which is mounted on the support frame (111); as well as An extrusion assembly (22) is provided in a plurality of such assemblies, and all such assemblies (22) are mounted on a support frame (111); The transmission component (21) includes a fixed plate two (211) fixedly connected to the top of the support frame (111). Two grooves (212) are opened on the fixed plate two (211). An auxiliary roller (213) is rotatably connected to the fixed plate two (211). A plurality of sliders one (214) are slidably connected to the inner wall of the grooves (212). Two rotating shafts one (215) are arranged between the plurality of sliders one (214). The two rotating shafts one (215) are rotatably connected to the plurality of sliders one (214) respectively. An extrusion roller (216) is fixedly connected to the outer wall of the two rotating shafts one (215). Two extrusion rollers (216) are in contact with each other.

2. The blow molding apparatus for PE film processing according to claim 1, characterized in that, The traction unit (3) includes a pulling assembly (31), which is mounted on a fixing plate (112); and Resistance component (32), the resistance component (32) is disposed on fixed plate one (112); The tension component (31) is located inside the fixed plate (112), and the resistance component (32) is located on the front side of the fixed plate (112).

3. The blow molding apparatus for PE film processing according to claim 2, characterized in that, The guide portion (4) includes a sliding assembly (41), which is disposed on a fixed plate (112); and An auxiliary component (42) is mounted on a fixed plate (112).

4. The blow molding apparatus for PE film processing according to claim 3, characterized in that, The extrusion assembly (22) includes a threaded rod (221) threadedly connected to a fixed plate (211), a slider (222) rotatably connected to the left side of the threaded rod (221), a spring (223) fixedly connected to the left side of the slider (222), a handle (224) fixedly connected to the left side of the spring (223). Among them, slider 2 (222) extends outside the groove (212).

5. The blow molding apparatus for PE film processing according to claim 4, characterized in that, The pulling assembly (31) includes a second rotating shaft (311) rotatably connected to a first fixed plate (112). A friction roller (312) is fixedly connected to the outer wall of the second rotating shaft (311). A ratchet (313) is fixedly connected to the outer wall of the second rotating shaft (311). An adapter plate (314) is provided on the front side of the ratchet (313). The adapter plate (314) is adapted to the ratchet (313). A winding component is provided on the first fixed plate (112). The adapter plate (314) meshes with the teeth on the ratchet (313).

6. The blow molding apparatus for PE film processing according to claim 5, characterized in that, The resistance assembly (32) includes a threaded rod (321) rotatably connected to the front side of a fixed plate (112). Several sliding rods (322) are fixedly connected to the front side of the fixed plate (112). A connecting plate (323) is threadedly connected to the outer wall of the threaded rod (321). A spring (324) is fixedly connected to the rear side of the connecting plate (323). The rear side of the spring (324) is fixedly connected to the adapter plate (314). Among them, the initial state of spring 2 (324) is a compressed state.

7. The blow molding apparatus for PE film processing according to claim 6, characterized in that, The sliding assembly (41) includes a bidirectional threaded rod (411) rotatably connected to the inner wall of the fixed plate (112). The front side of the bidirectional threaded rod (411) extends to the outside of the fixed plate (112). The outer wall of the bidirectional threaded rod (411) is threaded with two sliding plates (412). The top of each of the two sliding plates (412) is fixedly connected with a guide plate (413). The front side of the bidirectional threaded rod (411) is fixedly connected with a handle (414). The two skateboards (412) and the two guide plates (413) are all mirror images of each other.

8. The blow molding apparatus for PE film processing according to claim 7, characterized in that, The auxiliary component (42) includes several sliding rods (421) that pass through the two sliding plates (412). The several sliding rods (421) are fixedly connected to the fixing plate (112). The outer wall of the bidirectional threaded rod (411) is fitted with several telescopic sleeves (422). The front and rear sides of the telescopic sleeve (422) located in the middle are fixedly connected to the two sliding plates (412) respectively. The sides of the two telescopic sleeves (422) located on the front and rear sides that are close to each other are fixedly connected to the two sliding plates (412) respectively. The sides of the two telescopic sleeves (422) located on the front and rear sides that are far apart from each other are fixedly connected to the fixing plate (112). The telescopic sleeve (422) retracts as the skateboard (412) moves.

9. The blow molding apparatus for PE film processing according to claim 8, characterized in that, The winding component includes a rotating shaft three (315) rotatably connected to the inner wall of the fixed plate one (112). The front side of the rotating shaft three (315) extends to the outside of the fixed plate one (112). A winding roller (316) is fixedly connected to the outer wall of the rotating shaft three (315). A motor bracket (317) is fixedly connected to the front side of the fixed plate one (112). A motor (318) is fixedly connected to the inner wall of the motor bracket (317). The output shaft of the motor (318) is fixedly connected to the rotating shaft three (315) through a coupling. The motor (318) is fixed on the fixing plate (112) by the motor bracket (317).

10. A blow molding process for PE film processing, applicable to the blow molding apparatus for PE film processing as described in claim 8, characterized in that, Includes the following steps: S1: First, adjust the extrusion pressure of the two extrusion rollers (216) according to the required film thickness and material. When adjusting, turn the handle one (224). At this time, the handle one (224) will rotate along with the threaded rod one (221). As the threaded rod one (221) rotates, it will push the slider two (222) to the left. As the slider two (222) is pushed, the spring one (223) will push the slider one (214) to the left. After the two extrusion rollers (216) come into contact, the handle one (224) can be turned continuously. At this time, the spring one (223) will be squeezed, which will increase the extrusion pressure between the two extrusion rollers (216). Thus, the effect of adjusting the extrusion pressure between the two extrusion rollers (216) can be achieved. S2: Then adjust the resistance of the two friction rollers (312) to rotate. The tension of the film during winding can be adjusted by adjusting the resistance of the friction rollers (312). When adjusting, rotate the threaded rod (321). At this time, the threaded rod (321) will slide on the slide rod (322). As the connecting plate (323) slides, it will squeeze the spring (324) to the rear. At this time, the spring (324) will generate a certain thrust on the adapter plate (314). As the adapter plate (314) is pushed, the squeezing force between the ratchet (313) will continue to increase. As a result, the resistance when the rotating shaft (311) rotates will also be greater, thereby achieving the effect of adjusting the tension of the film during winding. S3: Adjust the distance between the two guide plates (413) according to the size of the film. When adjusting, turn the handle (414). The bidirectional threaded rod (411) will rotate. When the bidirectional threaded rod (411) rotates, it will drive the two slide plates (412) away from each other or closer to each other through the thread. At this time, the guide plates (413) will also move closer to each other or further away from each other, so as to achieve the effect of adjusting the distance between the two guide plates (413). After the adjustment is completed, the film blown by the blow molding device (113) is placed between the two extrusion rollers (216) by pulling. Then, the film is wrapped around the auxiliary roller (213) and stuck between the two friction rollers (312). Then, the film is wrapped around the auxiliary roller on the fixed plate (112), passed through the two guide plates (413), and wound around the take-up roller (316). Then, the motor (318) on the motor bracket (317) is started. At this time, the take-up roller (316) will rotate to take up the film.

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