Film blowing forming equipment

Abstract

The utility model discloses film blowing forming equipment, and relates to the technical field of blow molding equipment. The device comprises a bottom plate, a mounting shell is fixedly connected to the front side of the top of the bottom plate, a second two-way threaded rod is driven to rotate by starting a first motor, and the second two-way threaded rod drives two first sliding shells and two connecting plates to slide on the inner wall of the mounting shell and move towards the center of the mounting shell. At the moment, two first sliding shells drive two connecting plates, a connecting shell and a second steel rod to move downwards, the material film is extruded to move downwards and be tensioned, through the operation, the second steel rod can conduct pressing according to the looseness degree of the material film, looseness or over-tightness is prevented, therefore, the problem of wrinkles is avoided, and the machining efficiency is improved. The production cost is reduced, meanwhile, winding deviation is effectively prevented, and winding neatness and uniformity are guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to blow molding equipment technical field, especially relate to a film blowing forming equipment. BACKGROUND

[0002] In the prior art, through retrieval, it is found that Chinese patent discloses "a film blowing forming equipment", and its announcement number is "CN220282994U", the patent mainly drives the material roll to draw out to one side through the blanking hydraulic rod, at this time, the paper roll falls into the blanking slide, then the blanking hydraulic rod drives the material roll to reset, at this time, the paper roll in the material loading position is pushed to the outer surface of the material roll by the material loading hydraulic push rod, so that the paper roll replacement is convenient.

[0003] But the above-mentioned device lacks the structure of adjusting according to the tightness degree of the film when winding the film, and lacks the adjustment of the tightness degree of the plastic film, which makes the winding roller easy to wrinkle the film when winding the film, and the wrinkled film needs to be wound or cut again, which reduces the production efficiency and increases the production cost. UTILITY MODEL CONTENT

[0004] The utility model discloses a film blowing forming equipment, set up mounting mechanism, solved the usually lack the adjustment of the tightness degree of the plastic film, which makes the winding roller easy to wrinkle the film when winding the film, and the wrinkled film needs to be wound or cut again, which reduces the production efficiency and increases the production cost problem.

[0005] To solve the above technical problem, the utility model is realized by the following technical scheme:

[0006] The utility model discloses a kind of film blowing forming equipment, including bottom plate, the top front side of bottom plate is fixedly connected with installation shell, further includes, mounting mechanism, the mounting mechanism includes the film blowing machine fixedly connected in the top left side of bottom plate, the top of the film blowing machine is connected and fixedly connected with inlet material shell, the right side of the film blowing machine is fixedly connected with film blowing forming head, the bottom of the film blowing forming head is fixedly connected with the top of bottom plate, the top rear side of bottom plate is fixedly connected with film blowing fan, the front side of the film blowing fan is fixedly connected with connecting pipe, another end of the connecting pipe is communicated and fixedly connected with the outer wall of film blowing forming head, the top right side of bottom plate is fixedly connected with support shell, the inner wall of support shell is rotatably connected with two first steel rollers, two the first steel rollers are arranged with film blowing forming head as central axis symmetry, the inner wall of support shell is rotatably connected with first guide roller, the inner wall right side of installation shell is rotatably connected with first bidirectional screw rod, the right end of the first bidirectional screw rod extends to the outside of installation shell, the left end of the first bidirectional screw rod is rotatably connected with the inner wall left side of installation shell, the right end of the first bidirectional screw rod is fixedly connected with rocking disc, the outer wall of the first bidirectional screw rod is all threaded with baffle.

[0007] Further, two the baffle are arranged with installation shell as central axis symmetry, the inner wall of two the baffle is slidably connected with the outer wall of two first steel rollers and first guide roller, the inner wall right side of bottom plate is fixedly connected with first motor, the output end of the first motor is fixedly connected with second bidirectional screw rod through shaft coupling, the left end of the second bidirectional screw rod is rotatably connected with the inner wall left side of installation shell, the outer wall of the second bidirectional screw rod is all threaded with first sliding shell, two the first sliding shell are arranged with installation shell as central axis symmetry, the outer wall of two the first sliding shell is slidably connected with the inner wall of installation shell, the inner wall of two the first sliding shell is rotatably connected with connecting plate, the inner wall of the first sliding shell is rotatably connected with second steel roller.

[0008] Further, the inner wall of the installation shell is provided with connecting mechanism, the connecting mechanism includes the limiting rod fixedly connected in the inner wall of installation shell, the inner wall bottom of installation shell is fixedly connected with hydraulic cylinder.

[0009] Further, the output end of the hydraulic cylinder is fixedly connected with second sliding shell, the outer wall of the second sliding shell is slidably connected with the inner wall of installation shell, the outer wall of the limiting rod is slidably connected with third sliding shell.

[0010] Further, two the third sliding shell are arranged with installation shell as central axis symmetry, the inner wall left side and right side of the second sliding shell are rotatably connected with pull plate, the outer wall of two the pull plate is rotatably connected with the inner wall of two third sliding shell.

[0011] Further, the inner wall of the third sliding shell on the right side is fixedly connected with a second motor, the output end of the second motor is fixedly connected with a rotating shaft through a shaft coupling, the left end of the rotating shaft and the right side of the third sliding shell on the left side are both rotationally connected with a rotating shell, the inner wall of the two rotating shells is slidably connected with a rolling roller, and the outer wall of the rotating shell is fixedly connected with a connecting rod.

[0012] Further, the two connecting rods are symmetrically arranged with the mounting shell as the central axis, and the outer wall of the two connecting rods is slidably connected with the inner wall of the two rotating shells.

[0013] The utility model has the following beneficial effects:

[0014] 1. By setting up the mounting mechanism, the two baffle plates are driven to move on the outer wall and move to the center for rolling up the material, then the first motor is started to drive the second double -screw rod to rotate, the second double -screw rod drives two first sliding shells and two connecting plates to slide on the inner wall of the mounting shell and move to the center, at this time, the two first sliding shells drive two connecting plates and connecting shells and second steel bars to move downwards, the material film is extruded to move downwards, the second steel bar can be compressed according to the material film relaxation, and the problem of wrinkles is avoided, the processing efficiency is improved, the production cost is reduced, the rolling deviation is effectively prevented, and the neatness and consistency of rolling are ensured.

[0015] 2. By setting up the connecting mechanism, the second sliding shell is driven to move backwards by the hydraulic cylinder, the second sliding shell drives the left and right pull plates to move backwards, at this time, the two pull plates drive the two third sliding shells to slide on the inner wall of the limiting rod and move to the center, the left third sliding shell drives the left rotating shell, the right third sliding shell drives the second motor and the rotating shaft and the rotating shell to cooperate to clamp and limit the rolling roller and the two connecting rods, and the convenient replacement of the rolling roller is realized, the replacement time of the rolling roller and the equipment downtime are reduced, the equipment can be restored to production in a shorter time, and the production efficiency of the equipment is improved.

[0016] Of course, any product implementing the utility model does not necessarily need to achieve all the advantages mentioned above. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creating labor.

[0018] Figure 1It is the whole structure schematic view of the utility model.

[0019] Figure 2 It is the whole local section structure schematic view of the utility model.

[0020] Figure 3 It is the installation mechanism structure schematic view of the utility model.

[0021] Figure 4 It is the connecting mechanism structure schematic view of the utility model.

[0022] Figure 5 It is Figure 4 The enlarged structure schematic view of A in the middle.

[0023] In the drawings, the component list represented by each sign is as follows:

[0024] 1, bottom plate, 11, installation shell, 2, installation mechanism, 21, film blowing machine, 201, feeding shell, 202, film blowing forming head, 22, film blowing fan, 23, connecting pipe, 24, support shell, 25, first steel roller, 26, first guide roller, 27, first bidirectional screw rod, 28, rocking disc, 29, partition plate, 291, first motor, 210, second bidirectional screw rod, 211, first sliding shell, 212, connecting plate, 213, connecting shell, 214, second steel roller, 3, connecting mechanism, 31, limiting rod, 32, hydraulic cylinder, 33, second sliding shell, 34, third sliding shell, 35, pull plate, 36, second motor, 37, rotating shaft, 38, rotating shell, 39, winding roller, 310, connecting rod. Specific embodiments

[0025] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0026] Please refer to Figures 1-5 The utility model discloses a kind of film blowing forming equipment, including bottom plate 1, the top front side of bottom plate 1 is fixedly connected with installation shell 11, still include;

[0027] The installation mechanism 2 comprises a film blowing machine 21 fixedly connected to the top left side of the bottom plate 1, a top of the film blowing machine 21 is communicated with and fixedly connected with an inlet shell 201, a right side of the film blowing machine 21 is fixedly connected with a film blowing forming head 202, a bottom of the film blowing forming head 202 is fixedly connected with the top of the bottom plate 1, a rear side of the top of the bottom plate 1 is fixedly connected with a film blowing blower 22, a front side of the film blowing blower 22 is fixedly connected with a connecting pipe 23, another end of the connecting pipe 23 is communicated with and fixedly connected with an outer wall of the film blowing forming head 202, a right side of the top of the bottom plate 1 is fixedly connected with a supporting shell 24, two first steel rollers 25 are rotatably connected to the inner wall of the supporting shell 24, the two first steel rollers 25 are symmetrically arranged with the film blowing forming head 202 as the center axis, a first guide roller 26 is rotatably connected to the inner wall of the supporting shell 24, a first bidirectional threaded rod 27 is rotatably connected to the right side of the inner wall of the installation shell 11, a right end of the first bidirectional threaded rod 27 extends to the outside of the installation shell 11, a left end of the first bidirectional threaded rod 27 is rotatably connected with the left side of the inner wall of the installation shell 11, a rocking disc 28 is fixedly connected to the right end of the first bidirectional threaded rod 27, a baffle 29 is threadedly sleeved on the outer wall of the first bidirectional threaded rod 27, the material is poured into the inside of the film blowing machine 21 through the inlet shell 201, then the film blowing machine 21 is started to process, then the film blowing blower 22 is started to send the external air into the inside of the film blowing forming head 202 through the connecting pipe 23, then the material is formed from the inside of the film blowing forming head 202 and discharged upward, at the same time, the film blowing blower 22 makes the material be stretched and cooled, a cylindrical film is formed, then passes through the two first steel rollers 25 above the supporting shell 24, then contacts with the first guide roller 26, and finally contacts with and winds around the winding roller 39, then the second motor 36 is started to drive the rotating shaft 37 and the winding roller 39 to rotate to wind the material, at this time, the rocking disc 28 is rotated, the rocking disc 28 drives the two baffles 29 to move on the outer wall thereof and move to the center thereof to limit the wound material to prevent the winding from being deviated.

[0028] Two partition plates 29 are arranged symmetrically about the mounting shell 11 as the center axis, the inner walls of the two partition plates 29 are in sliding connection with the outer walls of the two first steel rollers 25 and the first guide roller 26, the inner wall right side of the bottom plate 1 is fixedly connected with a first motor 291, the output end of the first motor 291 is fixedly connected with a second bidirectional threaded rod 210 through a shaft coupling, the left end of the second bidirectional threaded rod 210 is in rotary connection with the inner wall left side of the mounting shell 11, the outer walls of the second bidirectional threaded rod 210 are all threadedly sleeved with first sliding shells 211, the two first sliding shells 211 are arranged symmetrically about the mounting shell 11 as the center axis, the outer walls of the two first sliding shells 211 are in sliding connection with the inner wall of the mounting shell 11, the inner walls of the two first sliding shells 211 are all in rotary connection with connecting plates 212, the inner wall of the mounting shell 11 is in sliding connection with a connecting shell 213, the outer walls of the two connecting plates 212 are all in rotary connection with the top of the connecting shell 213, the inner wall of the connecting shell 213 is in rotary connection with a second steel rod 214, then the first motor 291 is started, the first motor 291 drives the second bidirectional threaded rod 210 to rotate, the second bidirectional threaded rod 210 drives the two first sliding shells 211 and the two connecting plates 212 to slide on the inner wall of the mounting shell 11 and move to the center thereof, at this time the two first sliding shells 211 drive the two connecting plates 212, the connecting shell 213 and the second steel rod 214 to move downward, the material film is extruded and moved downward to be tensioned, so that the second steel rod 214 can be compressed according to the relaxation degree of the material film, preventing relaxation or over-tightening, thereby avoiding the problem of wrinkles, improving the processing efficiency, reducing the production cost, and effectively preventing the winding from shifting, ensuring the neatness and consistency of the winding.

[0029] The inner wall of the mounting shell 11 is provided with a connecting mechanism 3, the connecting mechanism 3 comprises a limiting rod 31 fixedly connected to the inner wall of the mounting shell 11, and a hydraulic cylinder 32 fixedly connected to the bottom of the inner wall of the mounting shell 11, the hydraulic cylinder 32 is started to drive the second sliding shell 33 to move backward.

[0030] The output end of the hydraulic cylinder 32 is fixedly connected with a second sliding shell 33, the outer wall of the second sliding shell 33 is in sliding connection with the inner wall of the mounting shell 11, the outer wall of the limiting rod 31 is in sliding connection with a third sliding shell 34, the hydraulic cylinder 32 drives the second sliding shell 33 to move backward, the second sliding shell 33 drives the left and right pull plates 35 to move backward, at this time, the two pull plates 35 drive the two third sliding shells 34 to slide on the inner wall of the limiting rod 31 and move to the center thereof.

[0031] The two third sliding shells 34 are symmetrically arranged with the mounting shell 11 as the center axis, the inner wall of the second sliding shell 33 is rotatably connected with the left and right pull plates 35, the outer wall of the two pull plates 35 is rotatably connected with the inner wall of the two third sliding shells 34, at this time, the two pull plates 35 drive the two third sliding shells 34 to slide on the inner wall of the limiting rod 31 and move to the center thereof, the left third sliding shell 34 drives the left rotating shell 38, and the right third sliding shell 34 drives the second motor 36, the rotating shaft 37 and the rotating shell 38 to cooperate to clamp and limit the winding roller 39 and the two connecting rods 310.

[0032] The inner wall of the right third sliding shell 34 is fixedly connected with the second motor 36, the output end of the second motor 36 is fixedly connected with the rotating shaft 37 through a shaft coupling, the left third sliding shell 34 drives the left rotating shell 38, and the right third sliding shell 34 drives the second motor 36, the rotating shaft 37 and the rotating shell 38 to cooperate to clamp and limit the winding roller 39 and the two connecting rods 310, so that the winding roller 39 is convenient to replace and use.

[0033] The left end of the rotating shaft 37 and the right side of the left third sliding shell 34 are rotatably connected with the rotating shell 38, the inner wall of the two rotating shells 38 is in sliding connection with the winding roller 39, the outer wall of the rotating shell 38 is fixedly connected with the connecting rod 310, and the second motor 36 is started to drive the rotating shaft 37 and the winding roller 39 to rotate to wind the material.

[0034] The two connecting rods 310 are symmetrically arranged with the mounting shell 11 as the center axis, the outer wall of the two connecting rods 310 is in sliding connection with the inner wall of the two rotating shells 38, the second sliding shell 33 is driven backward by starting the hydraulic cylinder 32, the left and right pull plates 35 are driven backward by the second sliding shell 33, at this time, the two pull plates 35 drive the two third sliding shells 34 to slide on the inner wall of the limiting rod 31 and move to the center thereof, the left third sliding shell 34 drives the left rotating shell 38, and the right third sliding shell 34 drives the second motor 36, the rotating shaft 37 and the rotating shell 38 to cooperate to clamp and limit the winding roller 39 and the two connecting rods 310, through the above operation, the winding roller 39 is conveniently replaced, the replacement time of the winding roller 39 and the equipment downtime are reduced, the equipment can be restored to production in a shorter time, and the production efficiency of the equipment is improved.

[0035] One specific application of this embodiment is the blown film fan 22, which is a specialized equipment designed to provide cooling air for plastic film production. It helps the film to cool and form quickly by generating a stable and low-temperature dry air flow. Its specific functions are as follows: improve product quality: the stable cold air provided by the blown film fan can help to improve the transparency and uniformity of the film, and reduce the film defects caused by temperature fluctuations. Improve production efficiency: using blown film fan can shorten the cooling time of the film, so as to speed up the production process and improve the overall efficiency. Reduce energy consumption cost: modern blown film fan design focuses on energy efficiency, which can reduce energy consumption while ensuring cooling effect, helping enterprises reduce production cost. With the progress of material science and manufacturing technology, the design and application of blown film fan will be more extensive and efficient.

[0036] When using the device, the material is poured into the inside of the film blowing machine 21 through the feeding shell 201, and then the film blowing machine 21 is started for processing. Then the external air is sent into the inside of the film blowing forming machine head 202 through the connecting pipe 23 by starting the film blowing fan 22. Then the material is formed from the inside of the film blowing forming machine head 202 and discharged upward. At the same time, the film blowing fan 22 makes the material be stretched and cooled, forming a cylindrical film. Then the material passes through the two first steel rollers 25 above the supporting shell 24 upward, and then contacts the first guide roller 26, and finally contacts and winds the winding roller 39. Then the second motor 36 is started to drive the rotating shaft 37 and the winding roller 39 to rotate to wind the material. At this time, the rotating disc 28 is rotated, and the rotating disc 28 drives the two partitions 29 to move on the outer wall and move to the center. The wound material is limited to prevent winding from being deviated. Then the first motor 291 is started to drive the second bidirectional threaded rod 210 to rotate. The second bidirectional threaded rod 210 drives the two first sliding shells 211 and the two connecting plates 212 to slide on the inner wall of the mounting shell 11 and move to the center. At this time, the two first sliding shells 211 drive the two connecting plates 212, the connecting shell 213 and the second steel roller 214 to move downward. The material film is extruded and moved downward to be tensioned. The second steel roller 214 can be compressed according to the relaxation degree of the material film to prevent relaxation or over-tightening, thereby avoiding the problem of wrinkles. Through the rotating disc 28, the two partitions 29 are driven to move on the outer wall and move to the center to limit the wound material to prevent winding from being deviated. Then the first motor 291 is started to drive the second bidirectional threaded rod 210 to rotate. The second bidirectional threaded rod 210 drives the two first sliding shells 211 and the two connecting plates 212 to slide on the inner wall of the mounting shell 11 and move to the center. At this time, the two first sliding shells 211 drive the two connecting plates 212, the connecting shell 213 and the second steel roller 214 to move downward. The material film is extruded and moved downward to be tensioned. Through the above operation, the second steel roller 214 can be compressed according to the relaxation degree of the material film to prevent relaxation or over-tightening, thereby avoiding the problem of wrinkles. The processing efficiency is improved, the production cost is reduced, and the winding deviation is effectively prevented, ensuring the neatness and consistency of the winding.

[0037] When the device is used, the hydraulic cylinder 32 is started, the hydraulic cylinder 32 drives the second sliding shell 33 to move backward, the second sliding shell 33 drives the left and right pull plates 35 to move backward, at this time, the two pull plates 35 drive the two third sliding shells 34 to slide on the inner wall of the limiting rod 31 and move to the center, the left third sliding shell 34 drives the left rotating shell 38, and the right third sliding shell 34 drives the second motor 36, the rotating shaft 37 and the rotating shell 38 to cooperate to clamp and limit the winding roller 39 and the two connecting rods 310, so that the winding roller 39 is convenient to replace, the hydraulic cylinder 32 is started to drive the second sliding shell 33 to move backward, the second sliding shell 33 drives the left and right pull plates 35 to move backward, at this time, the two pull plates 35 drive the two third sliding shells 34 to slide on the inner wall of the limiting rod 31 and move to the center, the left third sliding shell 34 drives the left rotating shell 38, and the right third sliding shell 34 drives the second motor 36, the rotating shaft 37 and the rotating shell 38 to cooperate to clamp and limit the winding roller 39 and the two connecting rods 310, through the above operation, the winding roller 39 is conveniently replaced, the winding roller 39 replacement time and equipment downtime are reduced, the equipment can be restored to production in a shorter time, so that the production efficiency of the equipment is improved.

[0038] In the description of the present specification, the description of the terms "one embodiment", "example", "specific example" and the like means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are contained in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0039] The preferred embodiments of the application disclosed above are only used to help explain the application. The preferred embodiments do not describe all the details, nor limit the application to the specific embodiments described. Obviously, according to the content of the specification, many modifications and changes can be made. The specification selects and describes these embodiments in order to better explain the principles and practical applications of the application, so that those skilled in the art can well understand and utilize the application. The application is limited by the claims and their entire scope and equivalents.

Claims

1. A film blowing forming equipment, comprising a bottom plate (1), the top front side of the bottom plate (1) is fixedly connected with a mounting shell (11), characterized in that: Also includes; The mounting mechanism (2) comprises a film blowing machine (21) fixedly connected to the left side of the top of the bottom plate (1), the top of the film blowing machine (21) is connected to and fixedly connected with a feed shell (201), the right side of the film blowing machine (21) is fixedly connected with a film blowing molding machine head (202), the bottom of the film blowing molding machine head (202) is fixedly connected to the top of the bottom plate (1), the top rear side of the bottom plate (1) is fixedly connected with a film blowing fan (22), the front side of the film blowing fan (22) is fixedly connected with a connecting pipe (23), the other end of the connecting pipe (23) is connected to and fixedly connected with the outer wall of the film blowing molding machine head (202), the right side of the top of the bottom plate (1) is fixedly connected with a supporting shell (24), and the bottom of the film blowing molding machine head (202) is fixedly connected to the top rear side of the bottom plate (1). ), the inner wall of the support shell (24) is rotatably connected to two first steel rollers (25), and the two first steel rollers (25) are symmetrically arranged with the film blowing machine head (202) as the central axis, the inner wall of the support shell (24) is rotatably connected to the first guide roller (26), the right side of the inner wall of the mounting shell (11) is rotatably connected to the first bidirectional threaded rod (27), the right end of the first bidirectional threaded rod (27) extends to the outside of the mounting shell (11), the left end of the first bidirectional threaded rod (27) is rotatably connected to the left side of the inner wall of the mounting shell (11), the right end of the first bidirectional threaded rod (27) is fixedly connected to the rocker (28), and the outer wall of the first bidirectional threaded rod (27) is threadedly sleeved with a partition (29).

2. A blown film forming apparatus according to claim 1, wherein The two partitions (29) are symmetrically arranged with the mounting shell (11) as the central axis, and the inner walls of the two partitions (29) are slidably connected to the outer walls of the two first steel rollers (25) and the first guide roller (26). The right side of the inner wall of the bottom plate (1) is fixedly connected to the first motor (291), and the output end of the first motor (291) is fixedly connected to the second bidirectional threaded rod (210) through a coupling. The left end of the second bidirectional threaded rod (210) is rotatably connected to the left side of the inner wall of the mounting shell (11), and the outer wall of the second bidirectional threaded rod (210) is threadedly sleeved. A first sliding shell (211) is provided, and the two first sliding shells (211) are symmetrically arranged with the installation shell (11) as the central axis. The outer walls of the two first sliding shells (211) are slidably connected to the inner wall of the installation shell (11), the inner walls of the two first sliding shells (211) are rotatably connected to a connecting plate (212), the inner wall of the installation shell (11) is slidably connected to a connecting shell (213), the outer walls of the two connecting plates (212) are rotatably connected to the top of the connecting shell (213), and the inner wall of the connecting shell (213) is rotatably connected to a second steel rod (214).

3. A blown film forming apparatus according to claim 2, wherein The inner wall of the mounting shell (11) is provided with a connecting mechanism (3), the connecting mechanism (3) comprising a limiting rod (31) fixedly connected to the inner wall of the mounting shell (11), and a hydraulic cylinder (32) fixedly connected to the bottom of the inner wall of the mounting shell (11).

4. A blown film forming apparatus according to claim 3, wherein The output end of the hydraulic cylinder (32) is fixedly connected with a second sliding shell (33), the outer wall of the second sliding shell (33) is in sliding connection with the inner wall of the mounting shell (11), and the outer wall of the limiting rod (31) is in sliding connection with a third sliding shell (34).

5. A blown film forming apparatus according to claim 4, wherein The two third sliding shells (34) are symmetrically arranged with the mounting shell (11) as the central axis, the inner wall of the second sliding shell (33) is rotatably connected with a pull plate (35) on the left side and the right side, and the outer wall of the two pull plates (35) is rotatably connected with the inner wall of the two third sliding shells (34).

6. A blown film forming apparatus according to claim 5, wherein The inner wall of the third sliding shell (34) on the right side is fixedly connected with a second motor (36), and the output end of the second motor (36) is fixedly connected with a rotating shaft (37) through a shaft coupling.

7. A blown film forming apparatus according to claim 6, wherein The left end of the rotating shaft (37) and the right side of the third sliding shell (34) on the left side are rotatably connected with a rotating shell (38), the inner wall of the two rotating shells (38) is in sliding connection with a rolling roller (39), and the outer wall of the rotating shell (38) is fixedly connected with a connecting rod (310).

8. A blown film forming apparatus according to claim 7, wherein The two connecting rods (310) are symmetrically arranged with the mounting shell (11) as the central axis, and the outer wall of the two connecting rods (310) is in sliding connection with the inner wall of the two rotating shells (38).

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