Blowing film method breathable film production line

Abstract

The utility model provides a film blowing method breathable film production line which comprises a film blowing machine, an edge trimmer, symmetrically arranged traction machines and symmetrically arranged winding machines which are arranged in the breathable film production direction, a longitudinal stretching machine is arranged between the edge trimmer and the traction machines, and a double-layer breathable film obtained through edge cutting of the edge trimmer is stretched through the longitudinal stretching machine. Through the structure, under the cooperation of the film blowing machine, the edge cutting machine, the longitudinal stretching machine, the symmetrically arranged traction machines and the symmetrically arranged winding machines, the edge cutting machine cuts the edge of a flattened bubble pipe to form a double-layer breathable film, and then the longitudinal stretching machine sequentially performs preheating, longitudinal stretching, shaping and cooling on the double-layer breathable film. According to the double-layer breathable film stretching device, the double-layer breathable film is made to form a continuous S-shaped structure, it is guaranteed that the double-layer breathable film can be fully preheated, stretched, shaped and cooled, then the double-layer breathable film can be wound through a traction machine arranged on the opposite layer and a winding machine symmetrically arranged, the complexity of the machining process is reduced, and the stretching efficiency of the breathable film is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of breathable membrane production lines, and in particular to a blown film breathable membrane production line. Background Technology

[0002] Currently, breathable films produced by blown film production generally involve extruding the melted material from the annular gap of the front die in an extruder into a cylindrical shape. Compressed air is then introduced through the central hole of the mandrel in the die head to inflate the cylinder into a bubble tube shape, resulting in elongation both longitudinally and transversely, thus obtaining a bubble tube with a certain inflation ratio. The bubble tube is then cooled by an outer air ring and then flattened by a guide clamp and traction clamp rollers. After being slit to form a double-layer film, the two layers of film are then wound up separately.

[0003] When a stretching process is required for the film, the rolled film must be manually transported or delivered to the corresponding stretching equipment for processing. During the stretching process, the film needs to be unwound and stretched again, and then rolled up again after stretching. This process increases the complexity of the breathable membrane processing. Moreover, this method of stretching can only stretch a single layer of film, which reduces the stretching efficiency. Utility Model Content

[0004] This utility model discloses a blown film breathable membrane production line, which mainly solves the problem that the traditional blown film method produces breathable membranes with cumbersome processing and low stretching efficiency during stretching.

[0005] To achieve the aforementioned objective, the technical solution of this utility model is implemented as follows:

[0006] This utility model provides a blown film breathable membrane production line, including a blown film machine, an edge trimmer, a symmetrically arranged traction machine and a symmetrically arranged winding machine arranged along the breathable membrane production direction. A longitudinal stretching machine is arranged between the edge trimmer and the traction machine so that the double-layer breathable membrane obtained by the edge trimmer is stretched by the longitudinal stretching machine.

[0007] The longitudinal stretching machine includes a frame, on which a pretreatment section, a stretching section, a shaping section, and a cooling section for processing double-layer breathable membranes are sequentially arranged. The pretreatment section, stretching section, shaping section, and cooling section are staggered. The frame is provided with a film-pulling mechanism for pulling the double-layer breathable membrane through the pretreatment section, stretching section, shaping section, and cooling section in sequence, so that the double-layer breathable membrane forms a longitudinally continuous S-shaped structure when passing through the pretreatment section, stretching section, shaping section, and cooling section in sequence. At least one roller pressing mechanism is provided on the frame at each position corresponding to the pretreatment section, stretching section, shaping section, and cooling section.

[0008] In one embodiment, the stretching section includes positioning rollers symmetrically arranged vertically and a first stretching roller and a second stretching roller arranged horizontally. The first stretching roller is driven by a first stretching cylinder, and the second stretching roller is driven by a second stretching cylinder.

[0009] In one embodiment, the pretreatment section includes a plurality of preheating rollers arranged in an alternating manner, and the shaping section includes a plurality of shaping rollers arranged in an alternating manner.

[0010] In one embodiment, a traction trimming machine and a corona machine are sequentially arranged between the longitudinal stretching machine and the traction machine.

[0011] In one embodiment, the cooling section includes a plurality of staggered cooling rollers.

[0012] In one embodiment, the film-drawing mechanism includes film-drawing rollers respectively disposed in the pretreatment section, stretching section, shaping section and cooling section, and the film-drawing rollers are driven by a film-drawing motor.

[0013] In one embodiment, the output end of the film-pulling motor is provided with a driving pulley, and the film-pulling roller is provided with a driven pulley. The driving pulley and the driven pulley are connected by a transmission belt.

[0014] In one embodiment, the film pulling mechanism further includes a tensioning roller driven by a tensioning cylinder to press the tensioning roller tightly against the transmission belt.

[0015] In one embodiment, the rolling mechanism includes a first rolling assembly, which includes a rolling frame with a first pressure roller. The rolling frame is driven by a first rolling cylinder, which causes the first pressure roller to press the double-layer breathable membrane into the pretreatment section, stretching section, shaping section, or cooling section.

[0016] In one embodiment, the rolling mechanism includes a second rolling assembly, which includes a swing arm frame rotatably connected to the frame. One end of the swing arm frame is provided with a second pressure roller, and the other end is driven to swing by a second rolling cylinder, so that the second pressure roller presses the double-layer breathable membrane into the pretreatment section, stretching section, shaping section or cooling section.

[0017] The advantages or beneficial effects of the above technical solution include at least the following: When producing breathable membranes by blown film method, the blown film machine, edge trimming machine, longitudinal stretching machine, symmetrically arranged traction machine, and symmetrically arranged winding machine work together to form a double-layer breathable membrane by trimming the flattened bubble tubes. Then, the double-layer breathable membrane is preheated, longitudinally stretched, shaped, and cooled sequentially by the pretreatment section, stretching section, shaping section, and cooling section of the longitudinal stretching machine, so that the double-layer breathable membrane forms a continuous S-shaped structure to ensure that the double-layer breathable membrane can be fully preheated, stretched, shaped, and cooled. Afterward, the double-layer breathable membrane can be separated and wound up separately by the symmetrically arranged traction machine and winding machine, thereby achieving uniform stretching and separate winding of the double-layer breathable membrane, reducing the complexity of the processing process, and improving the stretching efficiency of the breathable membrane. Attached Figure Description

[0018] The accompanying drawings illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the principles of the present invention. These drawings are included to provide a further understanding of the present invention and are incorporated in and constitute a part of this specification.

[0019] Figure 1 A schematic diagram of the entire present invention is shown;

[0020] Figure 2 A schematic diagram of the longitudinal stretching machine of this utility model is shown;

[0021] Figure 3 A schematic diagram of the pretreatment section, stretching section, shaping section, cooling section, film drawing mechanism and rolling mechanism of this utility model is shown;

[0022] Figure 4 A schematic diagram of the pretreatment section, stretching section, shaping section and cooling section of this utility model is shown;

[0023] Figure 5 A schematic diagram of the film-drawing mechanism of this utility model is shown;

[0024] Figure 6 A schematic diagram of the first roller pressing assembly of this utility model is shown;

[0025] Figure 7 A schematic diagram of the second roller pressing assembly of this utility model is shown.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Film blowing machine;

[0028] 2. Edge trimming machine;

[0029] 3. Longitudinal stretching machine;

[0030] 31. Frame; 32. Pre-treatment section; 321. Preheating roller; 33. Stretching section; 331. Positioning roller; 332. First stretching roller; 333. Second stretching roller; 334. First stretching cylinder; 335. Second stretching cylinder; 34. Shaping section; 341. Shaping roller; 35. Cooling section; 351. Cooling roller; 36. Film pulling mechanism; 361. Film pulling roller; 362. Film pulling motor; 363. Drive pulley; 364. Driven pulley; 365. Drive belt; 366. Tensioning roller; 367. Tensioning cylinder; 37. First roller pressing assembly; 371. Roller pressing frame; 372. First pressure roller; 373. First roller pressing cylinder; 38. Second roller pressing assembly; 381. Swing arm frame; 382. Second pressure roller; 383. Second roller pressing cylinder;

[0031] 4. Traction trimming machine;

[0032] 5. Coronavirus machine;

[0033] 6. Traction machine;

[0034] 7. Winding machine. Detailed Implementation

[0035] Embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While some embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the accompanying drawings and embodiments of the present invention are for illustrative purposes only and are not intended to limit the scope of protection of the present invention.

[0036] It should be noted that, where there is no conflict, the embodiments and features described in these embodiments can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0037] The term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to". The term "based on" means "at least partially based on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". Definitions of other terms will be given in the following description. It should be noted that the concepts of "first", "second", etc., mentioned in this utility model are only used to distinguish different devices, modules, or units, and are not used to limit the order of functions performed by these devices, modules, or units or their interdependencies.

[0038] It should be noted that the terms "a" and "a plurality of" used in this utility model are illustrative rather than restrictive. Those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0039] The names of the messages or information exchanged between the multiple devices in this embodiment of the invention are for illustrative purposes only and are not intended to limit the scope of these messages or information.

[0040] See Figures 1 to 4 This utility model provides a blown film breathable membrane production line, including a blown film machine 1, a trimming machine 2, a symmetrically arranged traction machine 6, and a symmetrically arranged winding machine 7 arranged along the breathable membrane production direction. A longitudinal stretching machine 3 is arranged between the trimming machine 2 and the traction machine 6, so that the double-layer breathable membrane obtained by the trimming machine 2 is stretched by the longitudinal stretching machine 3. A traction trimming machine 4 and a corona discharge machine 5 can be sequentially arranged between the longitudinal stretching machine 3 and the traction machine 6, that is, two corona discharge machines 5 are provided and respectively arranged between the traction trimming machine 4 and the traction machine 6, thereby enabling the double-layer breathable membrane to undergo corona discharge and winding processes respectively. The traction trimming machine 4 has the functions of traction and trimming, and can cut the edges of the stretched breathable membrane.

[0041] The longitudinal stretching machine 3 includes a frame 31, on which a pretreatment section 32, a stretching section 33, a shaping section 34, and a cooling section 35 for processing double-layer breathable membranes are arranged sequentially. The pretreatment section 32, stretching section 33, shaping section 34, and cooling section 35 are arranged alternately. The frame 31 is provided with a film pulling mechanism 36 for pulling the double-layer breathable membrane through the pretreatment section 32, stretching section 33, shaping section 34, and cooling section 35 in sequence, so that the double-layer breathable membrane forms a longitudinally continuous S-shaped structure when passing through the pretreatment section 32, stretching section 33, shaping section 34, and cooling section 35 in sequence. At least one roller pressing mechanism is provided on the frame 31 at each position corresponding to the pretreatment section 32, stretching section 33, shaping section 34, and cooling section 35.

[0042] Using the above structure, when producing breathable membranes by blown film method, the blown film machine 1, edge trimming machine 2, longitudinal stretching machine 3, symmetrically arranged traction machine 6, and symmetrically arranged winding machine 7 work together to form a double-layer breathable membrane by trimming the flattened bubble tubes with the edge trimming machine 2. Then, the double-layer breathable membrane is preheated, longitudinally stretched, shaped, and cooled sequentially by the pretreatment section 32, stretching section 33, shaping section 34, and cooling section 35 of the longitudinal stretching machine 3, so that the double-layer breathable membrane forms a continuous S-shaped structure to ensure that the double-layer breathable membrane can be fully preheated, stretched, shaped, and cooled. After that, the double-layer breathable membrane can be separated and wound up separately by the traction machine 6 and the symmetrically arranged winding machine 7, so as to achieve uniform stretching and separate winding of the double-layer breathable membrane, reduce the complexity of the processing process, and improve the stretching efficiency of the breathable membrane.

[0043] In one embodiment, see Figure 2 , Figure 3 and Figure 4 The pretreatment section 32 includes multiple preheating rollers 321 arranged in an alternating pattern. In practical applications, the alternating arrangement of multiple preheating rollers 321 can fully preheat the double-layer breathable membrane, facilitating subsequent stretching. Specifically, three preheating rollers 321 can be provided, arranged in an alternating pattern.

[0044] The stretching section 33 includes vertically symmetrically arranged positioning rollers 331 and horizontally arranged first stretching rollers 332 and second stretching rollers 333. The first stretching roller 332 is driven by a first stretching cylinder 334, and the second stretching roller 333 is driven by a second stretching cylinder 335. In practical applications, the two positioning rollers 331 work together to support both ends of the double-layer breathable membrane during stretching, allowing the first stretching rollers 332 and 333 to stretch the double-layer breathable membrane under the drive of the first stretching cylinders 334 and 335. The positioning rollers 331 and preheating rollers 321 located in the stretching section 33 near the pretreatment section 32 are staggered.

[0045] The shaping section 34 includes multiple staggered shaping rollers 341. In practical applications, the staggered arrangement of multiple shaping rollers 341 can shape the stretched double-layer breathable membrane, preventing it from shrinking. Specifically, three shaping rollers 341 can be provided, staggered with each other; the shaping roller 341 located in the shaping section 34 near the stretching section 33 is staggered with its adjacent positioning roller 331.

[0046] The cooling section 35 includes multiple cooling rollers 351 arranged in an alternating pattern. In practical applications, the alternating arrangement of the multiple cooling rollers 351 allows for the cooling of the shaped double-layer breathable membrane, further shaping the membrane. Specifically, two cooling sections 35 can be provided, arranged in an alternating pattern; the cooling roller 351 located in the cooling section 35 near the shaping section 34 is arranged in an alternating pattern with its adjacent shaping roller 341.

[0047] In one embodiment, see Figure 2 , Figure 3 and Figure 5The film-drawing mechanism 36 includes film-drawing rollers 361 respectively disposed in the pretreatment section 32, stretching section 33, shaping section 34, and cooling section 35. The film-drawing rollers 361 are driven by the film-drawing motor 362. In practical applications, through the cooperation of the film-drawing rollers 361 and the film-drawing motor 362, the film-drawing rollers 361 can be driven to rotate, so that the film-drawing rollers 361 can pull the double-layer breathable film through the pretreatment section 32, stretching section 33, shaping section 34, and cooling section 35 in sequence. Specifically, at least one film-pulling roller 361 is provided at each of the following positions: preheating roller 321, positioning roller 331, first stretching roller 332 or second stretching cylinder 335, shaping roller 341, and cooling roller 351. This ensures that the double-layer breathable membrane passing through the pretreatment section 32, stretching section 33, shaping section 34, and cooling section 35 can be pulled by the film-pulling roller 361, so that the double-layer breathable membrane can smoothly pass through the pretreatment section 32, stretching section 33, shaping section 34, and cooling section 35.

[0048] The output end of the film-pulling motor 362 is equipped with a drive pulley 363, and the film-pulling roller 361 is equipped with a driven pulley 364. The drive pulley 363 and the driven pulley 364 are connected by a transmission belt 365. In practical applications, the power of the film-pulling motor 362 can be transmitted to the film-pulling roller 361 through the cooperation of the drive pulley 363, the driven pulley 364, and the transmission belt 365, thereby driving the rotation of the film-pulling roller 361.

[0049] The film-pulling mechanism 36 also includes a tension roller 366, which is driven by a tension cylinder 367 to press the transmission belt 365 tightly. In practical applications, the tension roller 366 and the tension cylinder 367 work together to move the tension roller 366, thereby adjusting the tension of the transmission belt 365 and ensuring the transmission effect of the transmission belt 365.

[0050] In one embodiment, see Figure 2 , Figure 3 , Figure 6 and Figure 7 The rolling mechanism includes a first rolling assembly 37, which includes a rolling frame 371. A first pressure roller 372 is provided on the rolling frame 371. The rolling frame 371 is driven by a first rolling cylinder 373, so that the first pressure roller 372 presses the double-layer breathable membrane onto the pretreatment section 32, the stretching section 33, the shaping section 34, or the cooling section 35.

[0051] The rolling mechanism includes a second rolling assembly 38, which includes a swing arm 381 rotatably connected to the frame 31. One end of the swing arm 381 is provided with a second pressure roller 382, ​​and the other end is driven to swing by a second rolling cylinder 383, so that the second pressure roller 382 presses the double-layer breathable membrane onto the pretreatment section 32, the stretching section 33, the shaping section 34, or the cooling section 35.

[0052] In practical applications, depending on the actual location requirements, a first roller pressing assembly 37 or a second roller pressing assembly 38 of the roller pressing mechanism can be configured at the locations of the pretreatment section 32, stretching section 33, shaping section 34, or cooling section 35. Through the cooperation of the first pressure roller 372 and the first roller pressing cylinder 373 of the first roller pressing assembly 37, and the cooperation of the second pressure roller 382, ​​the swing arm frame 381, and the second roller pressing cylinder 383 of the second roller pressing assembly 38, the double-layer breathable membrane is tightly pressed onto the preheating roller 321, the positioning roller 331, the shaping roller 341, and the cooling roller 351, thereby ensuring the transmission stability of the double-layer breathable membrane.

[0053] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0054] Those skilled in the art should understand that the above embodiments are merely for clearly illustrating the present invention and are not intended to limit the scope of the present invention. For those skilled in the art, other changes or modifications can be made based on the above-described invention, and these changes or modifications still fall within the scope of the present invention.

Claims

1. A blown film breathable membrane production line, characterized in that, The device includes a blown film machine, an edge trimmer, a symmetrically arranged traction machine, and a symmetrically arranged winding machine arranged along the production direction of the breathable membrane. A longitudinal stretching machine is arranged between the edge trimmer and the traction machine so that the double-layer breathable membrane obtained by the edge trimmer is stretched by the longitudinal stretching machine. The longitudinal stretching machine includes a frame on which a pretreatment section, a stretching section, a shaping section, and a cooling section for processing a double-layer breathable membrane are sequentially arranged. The pretreatment section, stretching section, shaping section, and cooling section are staggered. The frame is provided with a film-pulling mechanism for pulling the double-layer breathable membrane sequentially through the pretreatment section, stretching section, shaping section, and cooling section, so that the double-layer breathable membrane forms a longitudinally continuous S-shaped structure when passing through the pretreatment section, stretching section, shaping section, and cooling section. At least one roller pressing mechanism is provided on the frame at each position corresponding to the pretreatment section, stretching section, shaping section, and cooling section.

2. The blown film breathable membrane production line as described in claim 1, characterized in that, The stretching section includes positioning rollers symmetrically arranged vertically and horizontally, and a first stretching roller and a second stretching roller arranged horizontally. The first stretching roller is driven by a first stretching cylinder, and the second stretching roller is driven by a second stretching cylinder.

3. The blown film breathable membrane production line as described in claim 1, characterized in that, The pretreatment section includes multiple preheating rollers arranged in an alternating manner, and the shaping section includes multiple shaping rollers arranged in an alternating manner.

4. The blown film breathable membrane production line as described in claim 1, characterized in that, A traction trimming machine and a corona machine are sequentially installed between the longitudinal stretching machine and the traction machine.

5. The blown film breathable membrane production line as described in claim 1, characterized in that, The cooling section includes multiple cooling rollers arranged in an alternating pattern.

6. The blown film breathable membrane production line as described in claim 1, characterized in that, The film-pulling mechanism includes film-pulling rollers respectively disposed in the pretreatment section, stretching section, shaping section and cooling section, and the film-pulling rollers are driven by a film-pulling motor.

7. The blown film breathable membrane production line as described in claim 6, characterized in that, The output end of the film-pulling motor is provided with a driving pulley, and the film-pulling roller is provided with a driven pulley. The driving pulley and the driven pulley are connected by a transmission belt.

8. The blown film breathable membrane production line as described in claim 7, characterized in that, The film pulling mechanism also includes a tensioning roller, which is driven by a tensioning cylinder to press the transmission belt tightly.

9. The blown film breathable membrane production line as described in claim 1, characterized in that, The rolling mechanism includes a first rolling assembly, which includes a rolling frame with a first pressure roller. The rolling frame is driven by a first rolling cylinder, which causes the first pressure roller to press the double-layer breathable membrane into the pretreatment section, stretching section, shaping section, or cooling section.

10. The blown film breathable membrane production line as described in claim 1, characterized in that, The roller pressing mechanism includes a second roller pressing assembly, which includes a swing arm frame rotatably connected to the frame. One end of the swing arm frame is provided with a second pressure roller, and the other end is driven to swing by a second roller pressing cylinder, so that the second pressure roller presses the double-layer breathable membrane into the pretreatment section, stretching section, shaping section or cooling section.

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