Film blowing device for plastic bag processing

Abstract

The utility model discloses a film blowing device for plastic bag processing, and particularly relates to the technical field of garbage bag processing equipment.The film blowing device comprises a bottom plate, the left portion of the upper side of the bottom plate is fixedly connected with a film blowing assembly, the middle of the upper side of the bottom plate is fixedly connected with a flattening assembly, and the right portion of the upper side of the bottom plate is fixedly connected with a rolling assembly; a rolling assembly is fixedly connected to the upper side of the bottom plate, and the flattening assembly and the rolling assembly are jointly and rotationally connected with a belt wheel set. According to the film blowing device for plastic bag processing, the flattening assembly is arranged, two pressing rollers are used for flattening a film, wrinkles and bubbles generated on the surface of the film in the film blowing process can be removed, the surface of the film is smoother and smoother, the winding assembly is arranged, the film can be wound, and the film blowing efficiency is improved. And meanwhile, the film can be pressed downwards through the rotating roller before winding, the rotating roller can automatically adapt to tension change in the film running process through pressure applied by the spring, the film is prevented from being snapped or deformed, and the winding quality is guaranteed.

Description

Technical Field

[0001] This utility model relates to the technical field of garbage bag processing equipment, and in particular to a blown film device for processing plastic bags. Background Technology

[0002] The blown film device used for plastic bag processing is the core equipment in the production of flexible plastic packaging. Its technical level and performance directly affect the film quality, production efficiency and cost control. The blown film device mainly consists of an extrusion system, a die head system, a cooling system, a traction system, a winding system and an electrical control system.

[0003] Chinese Patent Publication No. CN222004422U discloses a novel plastic bag blown film equipment, relating to the field of plastic bag processing technology. The equipment includes a storage bin mounted on top of a base plate; and a feeding mechanism located on top of the storage bin. The feeding mechanism comprises a crushing roller, two rotating rods, two pulleys, a moving belt, a stepper motor, and a feeding frame, used to refine larger materials and prevent clogging. The feeding frame is connected to the storage bin. The rotating rods are located at the top of the inner cavity of the feeding frame. This novel plastic bag blown film equipment, through the use of the feeding mechanism, crushes larger materials during operation. The stepper motor is activated by a controller, and the stepper motor drives the crushing roller to rotate via the rotating rods, pulleys, and moving belt, thereby crushing the larger materials. The crushed material is then filtered through a filter screen. When cleaning the filter screen is required, it can be directly pulled out.

[0004] Although the equipment in the aforementioned literature can blow and roll up the plastic film during the plastic bag processing, it cannot flatten the plastic film before rolling it up. During the blowing process, the plastic film may have wrinkles, bends, or uneven surfaces. If it is not flattened before rolling, the surface of the rolled plastic film will be uneven, affecting the appearance and potentially causing inconvenience in subsequent use. Utility Model Content

[0005] The main purpose of this invention is to provide a blown film device for processing plastic bags, which can effectively solve the problem of not being able to flatten the plastic film before winding.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A blown film device for processing plastic bags includes a base plate. A blown film assembly is fixedly connected to the upper left side of the base plate, a flattening assembly is fixedly connected to the upper middle side of the base plate, a winding assembly is fixedly connected to the upper right side of the base plate, and a winding assembly is fixedly connected to the upper side of the base plate. The flattening assembly and the winding assembly are rotatably connected to a pulley set. A motor is fixedly connected to the upper side of the base plate, and the output end of the motor is fixedly connected to the pulley set via a coupling.

[0008] Preferably, the base plate includes a blown film machine body and a support fixedly connected to the upper left side of the base plate. The blown film machine body is located in the middle of the support. Two limiting rollers are rotatably connected to the upper middle side of the support. A guide roller is fixedly connected to the upper right side of the support.

[0009] Preferably, the flattening assembly includes a support one fixedly connected to the middle of the upper side of the base plate. The upper sides of the support one are provided with sliding grooves. Sliding blocks are slidably connected to the inner surfaces of the two sliding grooves. Threaded rods are threadedly connected to both sides of the upper end of the support one. The two threaded rods are rotatably connected to one of the sliding blocks that are close to each other. The two sliding blocks are rotatably connected to a pressure roller one. A pressure roller two is rotatably connected to the upper side of the support one. An adjustment part is rotatably connected to the rear end of the support one.

[0010] Preferably, the adjusting part includes a gear 1 rotatably connected to one side of the rear end of the support 1, a gear 2 meshing on the upper side of the gear 1, the gear 2 being movably connected to the support 1, a gear 3 meshing on the right side of the gear 1, a gear 4 rotatably connected to the rear end of a sliding block located on the rear side, the gear 4 meshing with the gear 2, the gear 2 and the gear 4 being rotatably connected to a connecting rod 1, and the gear 1 and the gear 2 being rotatably connected to a connecting rod 2.

[0011] Preferably, the rear end of the first pressure roller passes through a sliding block located on the rear side and is fixedly connected to the fourth gear; the rear end of the second pressure roller passes through the first support and is fixedly connected to the third gear; and the front end of the second pressure roller passes through the first support and is fixedly connected to the pulley assembly.

[0012] Preferably, the winding assembly includes a second support fixedly connected to the left end of the first support, a first roller rotatably connected to the middle of the second support, a tensioning part rotatably connected to the left side of the first support, and the front end of the tensioning part passing through the second support and fixedly connected to the pulley assembly.

[0013] Preferably, the tensioning part includes two connecting rods three rotatably connected to the left side of the support one, a fixed seat is rotatably connected to the lower side of the two connecting rods three, a rotating roller two is rotatably connected to the lower side of the fixed seat, sliding rods are fixedly connected to both sides of the upper end of the fixed seat, springs are sleeved on the lower side of the outer surface of the two sliding rods, and the two sliding rods are slidably connected to the support two.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. This utility model uses a flattening component with two pressure rollers to flatten the film, which can remove wrinkles and air bubbles generated on the film surface during the blown film process, making the film surface smoother and flatter. At the same time, the pressure of the rollers can squeeze out air bubbles in the film, preventing air bubbles from remaining in the film and affecting its quality. In addition, the distance between the pressure rollers can be adjusted according to the actual situation of the film, so that wrinkles, air bubbles and other defects on the film surface can be effectively treated, thereby obtaining higher flatness and smoothness.

[0016] 2. This utility model can wind up the film by setting up a winding assembly. At the same time, the film can be pressed down by a rotating roller before winding. The rotating roller can automatically adapt to the tension changes of the film during operation by the pressure applied by the spring, preventing the film from being torn or deformed, so that the winding tension is always kept within a suitable range and the winding quality is guaranteed. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the blown film assembly structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the flattening component structure of this utility model;

[0020] Figure 4 This is a partial cross-sectional structural diagram of the winding assembly of this utility model;

[0021] Figure 5 This is a schematic diagram of the tensioning part structure of this utility model.

[0022] In the diagram: 1. Base plate; 2. Blown film assembly; 21. Blown film machine body; 22. Support; 23. Limiting roller; 24. Guide roller; 3. Flattening assembly; 31. Support 1; 32. Slide groove; 33. Sliding block; 34. Threaded rod; 35. Pressure roller 1; 36. Pressure roller 2; 37. Adjustment part; 371. Gear 1; 372. Gear 2; 373. Gear 3; 374. Gear 4; 375. Connecting rod 1; 376. Connecting rod 2; 4. Rewinding assembly; 41. Support 2; 42. Rotating roller 1; 43. Tensioning part; 431. Connecting rod 3; 432. Fixed seat; 433. Rotating roller 2; 434. Slide rod; 435. Spring; 5. Motor; 6. Pulley assembly. Detailed Implementation

[0023] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0024] Example 1

[0025] like Figure 1 As shown, a blown film device for processing plastic bags includes a base plate 1, a blown film assembly 2 fixedly connected to the upper left side of the base plate 1, a flattening assembly 3 fixedly connected to the upper middle side of the base plate 1, a winding assembly 4 fixedly connected to the upper right side of the base plate 1, a winding assembly 4 fixedly connected to the upper side of the base plate 1, a pulley group 6 rotatably connected to the flattening assembly 3 and the winding assembly 4, and a motor 5 fixedly connected to the upper side of the base plate 1. The output end of the motor 5 is fixedly connected to the pulley group 6 through a coupling.

[0026] like Figure 2 As shown, the base plate 1 includes a blown film machine body 21 and a support 22 fixedly connected to the upper left side of the base plate 1. The blown film machine body 21 is located in the middle of the support 22. Two limiting rollers 23 are rotatably connected to the upper middle part of the support 22. A guide roller 24 is fixedly connected to the upper right side of the support 22.

[0027] The blown film machine body 21 adopts existing technology. Its working principle is to heat and melt plastic particles, extrude them through an extruder to form a tubular plastic melt, and then introduce compressed air from the center of the extruder die to blow the tubular melt into a thin film bubble. At the same time, the thin film bubble is pulled upward by a traction device. During the traction process, the thin film bubble gradually cools and solidifies.

[0028] This embodiment is applicable to the blown film processing of drawstring garbage bags.

[0029] In this embodiment, a certain amount of air or inert gas is blown into the tubular film processed by the extrusion system and cooling system through the blown film machine body 21, causing the film to expand like a balloon, and the limiting roller 23 limits the film.

[0030] like Figure 3 As shown, the flattening assembly 3 includes a support 31 fixedly connected to the middle of the upper side of the base plate 1. Both sides of the support 31 are provided with sliding grooves 32. Sliding blocks 33 are slidably connected to the inner surfaces of the two sliding grooves 32. Threaded rods 34 are threadedly connected to both sides of the upper end of the support 31. The two threaded rods 34 are rotatably connected to a sliding block 33 that is close to each other. The two sliding blocks 33 are rotatably connected to a pressure roller 35. A pressure roller 36 is rotatably connected to the upper side of the support 31. An adjustment part 37 is rotatably connected to the rear end of the support 31.

[0031] like Figure 3 As shown, the adjusting part 37 includes a gear 371 rotatably connected to one side of the rear end of the support 31. Gear 372 meshes with the upper side of gear 371, and gear 373 meshes with the right side of gear 371. Gear 373 is rotatably connected to the support 31. Gear 374 is rotatably connected to the rear end of a sliding block 33 located on the rear side. Gear 374 meshes with gear 372. Gear 372 and gear 374 are rotatably connected to a connecting rod 375. Gear 371 and gear 372 are rotatably connected to a connecting rod 376.

[0032] Compared to using two gears to drive the pressure rollers to squeeze and flatten the film, this embodiment uses a combination of four gears to drive the pressure roller 35 and pressure roller 36 to rotate. The distance between the pressure roller 35 and pressure roller 36 can be adjusted to accommodate films of different specifications.

[0033] Films of different materials and thicknesses require different pressures and spacings during the flattening process. Adjustable pressure roller spacing can adapt to the processing requirements of various film materials and specifications, enhancing the versatility and flexibility of blown film equipment.

[0034] Furthermore, the rear end of pressure roller 1 35 passes through a sliding block 33 located on the rear side and is fixedly connected to gear 4 374, the rear end of pressure roller 2 36 passes through support 1 31 and is fixedly connected to gear 3 373, and the front end of pressure roller 2 36 passes through support 1 31 and is fixedly connected to pulley group 6.

[0035] The film is conveyed by guide roller 24 to the area between pressure roller 35 and pressure roller 35. Motor 5 drives pulley group 6 to rotate, which in turn drives pressure roller 36 and gear 373 to rotate. Gear 373 drives gear 1 to rotate, which in turn drives gear 2 to rotate and gear 4 to rotate. Gear 4 to rotate pressure roller 35. Pressure roller 1 and pressure roller 2 together squeeze the film, which can smooth out wrinkles and make the film surface smoother and flatter.

[0036] Simultaneously, the distance between pressure roller 35 and pressure roller 36 can be adjusted according to the thickness of the film. By rotating the threaded rod 34, pressure roller 35 is moved, and pressure roller 35 drives gear 4 374 to move synchronously. Gear 4 374 and gear 2 372 are connected by connecting rod 1 375. When gear 4 374 moves, connecting rod 1 375 rotates accordingly, thereby driving gear 2 372 to adjust its position. Through the connection of connecting rod 1 375, the meshing state of gear 4 374 and gear 2 372 can always be maintained.

[0037] Example 2

[0038] Based on Embodiment 1, this embodiment adds a winding component 4, which can wind up the film. At the same time, before winding, the film can be pressed down by a rotating roller. The rotating roller can automatically adapt to the tension changes of the film during operation by the pressure applied by the spring, preventing the film from being torn or deformed, so that the winding tension is always kept within a suitable range and the winding quality is guaranteed.

[0039] like Figure 4 As shown, the winding assembly 4 includes a second support 41 fixedly connected to the left end of the first support 31. A first roller 42 is rotatably connected to the middle of the second support 41. A tensioning part 43 is rotatably connected to the left side of the first support 31. The front end of the tensioning part 43 passes through the second support 41 and is fixedly connected to the pulley group 6.

[0040] like Figure 5 As shown, the tensioning part 43 includes two connecting rods 431 rotatably connected to the left side of the support 31. The lower sides of the two connecting rods 431 are rotatably connected to a fixed seat 432. The lower side of the fixed seat 432 is rotatably connected to a roller 433. The upper ends of the fixed seat 432 are fixedly connected to two sliding rods 434. The lower side of the outer surface of the two sliding rods 434 is fitted with a spring 435. The two sliding rods 434 are slidably connected to the support 41.

[0041] In this embodiment, after the flattening assembly flattens the film, the head of the film is manually passed through the underside of the second roller 433 and wrapped around the outer surface of the first roller 42.

[0042] The pulley assembly 6 drives the first roller 42 to rotate, and the first roller 42 winds up the plastic film. Because the spring 435 has elasticity, the position of the second roller 433 can be adjusted to adjust the downward pressure on the plastic film, and the winding tension of the plastic film can be controlled to a certain extent. By pressing down on the plastic film by the second roller 433, the plastic film can be wound more tightly and flatly on the first roller 42 during the winding process.

[0043] The rotating roller 42 adopts existing technology and consists of a central shaft and a detachable sleeve. Before winding, the sleeve is installed on the central shaft, and the film is wound on the sleeve. After winding, the sleeve can be removed from the central shaft by means of rotation, sliding or unlocking, so that the sleeve is separated from the central shaft, and then the film roll can be removed from the sleeve.

[0044] It should be noted that the specific installation method of the motor 5, the circuit connection method, and the control method used in this utility model are all conventional designs, and will not be described in detail in this utility model.

[0045] The working principle of this utility model is as follows: First, a certain amount of air or inert gas is blown into the tubular film processed by the extrusion system and cooling system through the blown film machine body 21, so that the film expands like a balloon, and the limiting roller 23 limits the film.

[0046] The film is then transferred via guide roller 24 to the space between pressure roller 35 and pressure roller 35. Motor 5 drives pulley group 6 to rotate, which in turn drives pressure roller 36 and gear 373 to rotate. Gear 373 drives gear 1 to rotate, which in turn drives gear 2 to rotate and gear 4 to rotate. Gear 4 to rotate pressure roller 35. Pressure roller 1 and pressure roller 2 together squeeze the film, which can smooth out wrinkles and make the film surface smoother and flatter. At the same time, the distance between pressure roller 1 and pressure roller 2 can be adjusted according to the thickness of the film. Rotating threaded rod 34 pushes sliding block 33 to move in the vertical direction, adjusting the position of pressure roller 1. When pressure roller 1 moves, it drives connecting rod 375 to rotate, ensuring that gear 2 372 and gear 4 374 remain engaged.

[0047] The film is then transferred to the underside of the second roller 433 and finally wound around the outer surface of the first roller 42. The pulley group 6 drives the first roller 42 to rotate, and the first roller 42 winds up the plastic film. Because the spring 435 has elasticity, the position of the second roller 433 can be adjusted to adjust the downward pressure on the plastic film, and the winding tension of the plastic film can be controlled to a certain extent. By pressing down on the plastic film by the second roller 433, the plastic film can be wound more tightly and flatly on the first roller 42 during the winding process.

[0048] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A blown film device for processing plastic bags, comprising a base plate (1), characterized in that: A blown film assembly (2) is fixedly connected to the upper left side of the base plate (1), a flattening assembly (3) is fixedly connected to the upper middle side of the base plate (1), a winding assembly (4) is fixedly connected to the upper right side of the base plate (1), a winding assembly (4) is fixedly connected to the upper side of the base plate (1), the flattening assembly (3) and the winding assembly (4) are rotatably connected to a pulley group (6), a motor (5) is fixedly connected to the upper side of the base plate (1), and the output end of the motor (5) is fixedly connected to the pulley group (6) through a coupling.

2. The blown film device for processing plastic bags according to claim 1, characterized in that: The base plate (1) includes a blown film machine body (21) and a bracket (22) fixedly connected to the upper left side of the base plate (1). The blown film machine body (21) is located in the middle of the bracket (22). Two limiting rollers (23) are rotatably connected to the upper middle side of the bracket (22). A guide roller (24) is fixedly connected to the upper right side of the bracket (22).

3. The blown film device for processing plastic bags according to claim 1, characterized in that: The flattening assembly (3) includes a support (31) fixedly connected to the middle of the upper side of the base plate (1). The upper sides of the support (31) are provided with sliding grooves (32). The inner surfaces of the two sliding grooves (32) are slidably connected with sliding blocks (33). The upper sides of the support (31) are threaded with threaded rods (34). The two threaded rods (34) are rotatably connected to one of the sliding blocks (33) that are close to each other. The two sliding blocks (33) are rotatably connected with a pressure roller (35). The upper side of the support (31) is rotatably connected with a pressure roller (36). The rear end of the support (31) is rotatably connected with an adjustment part (37).

4. The blown film device for processing plastic bags according to claim 3, characterized in that: The adjusting part (37) includes a gear 1 (371) rotatably connected to one side of the rear end of the support 1 (31), a gear 2 (372) meshing on the upper side of the gear 1 (371), a gear 3 (373) meshing on the right side of the gear 1 (371), the gear 3 (373) rotatably connected to the support 1 (31), a gear 4 (374) rotatably connected to the rear end of a sliding block (33) located on the rear side, the gear 4 (374) meshing with the gear 2 (372), the gear 2 (372) and the gear 4 (374) rotatably connected together to a connecting rod 1 (375), and the gear 1 (371) and the gear 2 (372) rotatably connected together to a connecting rod 2 (376).

5. The blown film device for processing plastic bags according to claim 4, characterized in that: The rear end of the first pressure roller (35) passes through a sliding block (33) located on the rear side and is fixedly connected to the fourth gear (374). The rear end of the second pressure roller (36) passes through the first support (31) and is fixedly connected to the third gear (373). The front end of the second pressure roller (36) passes through the first support (31) and is fixedly connected to the pulley group (6).

6. The blown film device for processing plastic bags according to claim 3, characterized in that: The winding assembly (4) includes a second support (41) fixedly connected to the left end of the first support (31), a first roller (42) rotatably connected to the middle of the second support (41), a tensioning part (43) rotatably connected to the left side of the first support (31), and the front end of the tensioning part (43) passes through the second support (41) and is fixedly connected to the pulley group (6).

7. The blown film device for processing plastic bags according to claim 6, characterized in that: The tensioning part (43) includes two connecting rods (431) rotatably connected to the left side of the support (31). The lower sides of the two connecting rods (431) are rotatably connected to a fixed seat (432). The lower side of the fixed seat (432) is rotatably connected to a rotating roller (433). The upper ends of the fixed seat (432) are fixedly connected to two sliding rods (434). The lower sides of the outer surfaces of the two sliding rods (434) are fitted with springs (435). The two sliding rods (434) are slidably connected to the support (41).

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