Stretching device for biodegradable film processing

Abstract

The utility model discloses a stretching device for biodegradable film processing, which relates to the technical field of biodegradable film processing, and comprises two racks, a film inlet roller and a film outlet roller are respectively arranged on two sides of the two racks, a compression roller is further arranged on each rack, and the compression rollers are arranged on the two sides of each rack. An adjusting assembly capable of adjusting the height between the two groups of compression rollers so as to change the lifting force of the biodegradable film is assembled on the racks, and an anti-wrinkle assembly capable of smoothing the biodegradable film, heating the edge and reducing the breakage of the biodegradable film caused by edge stress concentration is also assembled between the two racks; the stretching strength on the biodegradable film can be accurately changed by adjusting the height difference between the two sets of pressing rollers, the servo motor is used for driving the first lead screw to rotate, the two lifting blocks synchronously ascend and descend through meshing transmission of the first gear and the first synchronous belt, then each set of pressing rollers are driven to move, and the thickness and performance uniformity of the biodegradable film are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of biodegradable film processing, in particular to a stretching device used for biodegradable film processing. Background Art

[0002] Biodegradable film is a film made of biodegradable materials as the main raw material. It can be degraded into harmless substances such as carbon dioxide and water through the action of microorganisms in the natural environment, and does not pollute the environment.

[0003] In the processing of biodegradable films, the stretching process is crucial. Traditional stretching devices mostly use a single set of pressure rollers for stretching. This method makes it difficult to accurately control the stretching force, which can easily lead to uneven force on the film and local over- or under-stretching problems, making the thickness and performance of the film uneven. At the same time, biodegradable films of different thicknesses require different stretching forces and spacings, but the pressure roller spacing of traditional devices is not adjustable and cannot meet diverse needs. In addition, the edges of the film are easily broken due to stress concentration during stretching, thus affecting the yield. Utility Model Content

[0004] The purpose of the utility model is to solve the problems of unadjustable spacing between press rollers in traditional devices and easy cracking of edges due to stress concentration during stretching, and to propose a stretching device for biodegradable film processing.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A stretching device for processing biodegradable film, comprising a frame, two frames with film feed rollers and film discharge rollers respectively disposed on either side thereof, the frames further being provided with pressure rollers, the frames being equipped with an adjustment component capable of adjusting the height between the two sets of pressure rollers to thereby change the pulling force on the biodegradable film, and an anti-wrinkle component also being equipped between the two frames to smooth the biodegradable film and heat the edges to reduce breakage of the biodegradable film due to edge stress concentration;

[0007] The adjustment assembly includes a first screw rod symmetrically installed on the frame, a lifting block is threadedly connected to the surface of the first screw rod, a first synchronous belt is meshed between the two first screw rods through a first gear, a servo motor is fixedly connected to one side of the frame, and the lifting block is also equipped with a lifting component that can adjust the distance between the two pressure rollers, and an auxiliary component used in conjunction with the lifting component to enable the biodegradable film to maintain tension when stretched.

[0008] As a further description of the above technical solution:

[0009] The lifting component includes a support plate fixedly installed on one side of the lifting block, and the two support plates are both threadedly connected with a second screw rod, and a second synchronous belt is meshed between the two second screw rods through a second gear.

[0010] As a further description of the above technical solution:

[0011] The surface of the second screw rod is threadedly connected with a slider, one of the pressure rollers is rotatably mounted on the slider, and one of the first screw rods is fixedly mounted on the output end of the servo motor.

[0012] As a further description of the above technical solution:

[0013] The auxiliary component includes a fixing frame fixedly mounted on one side of the support plate, and the arc block is arranged between the two fixing frames via a first spring;

[0014] The arc block is slidably installed between two fixing frames.

[0015] As a further description of the above technical solution:

[0016] The anti-wrinkle assembly includes a mounting frame fixedly installed between two frames, two movable frames are arranged on the mounting frame through positive and negative screw rods, a lifting plate is arranged between the two movable frames through an insertion rod, a second spring is fixedly installed between the insertion rod and the movable frame, and a heating element is fixedly connected to the top of the inner wall of the movable frame.

[0017] As a further description of the above technical solution:

[0018] The forward and reverse screw rods are rotatably mounted on the bottom of the mounting frame, and two movable frames are threadedly mounted on both ends of the forward and reverse screw rods. The bottom ends of both sides of the movable frame are rotatably connected with rollers.

[0019] As a further description of the above technical solution:

[0020] The insertion rod is slidably mounted on the movable frame, and the middle portion of the lifting plate is arranged into two sections, which are slidably connected by an extension plate.

[0021] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0022] By adjusting the height difference between the two sets of pressure rollers, the stretching force on the biodegradable film can be accurately changed. The servo motor drives the first screw to rotate, and the meshing transmission of the first gear and the first synchronous belt is used to realize the synchronous lifting and lowering of the two lifting blocks, thereby driving each set of pressure rollers to move. This precise adjustment method can effectively avoid excessive or insufficient local stretching of the biodegradable film and improve the uniformity of the thickness and performance of the biodegradable film. When the second screw of the lifting component rotates, the second gear and the second synchronous belt drive the slider to drive the pressure roller to rise and fall, and adjust the distance between the two pressure rollers. This makes the device compatible with biodegradable films of different thicknesses and adjusts the resistance encountered by the biodegradable film when passing through the pressure roller. , which expands the scope of application of the equipment and meets diversified production needs; the arc block of the auxiliary component contacts the bottom of the biodegradable film through the reaction force of the first spring, and cooperates with the pressure roller to prevent the biodegradable film from relaxing during transportation, which helps to ensure the stability of the stretching process and avoid unevenness or defects caused by relaxation of the biodegradable film; the heating element of the anti-wrinkle component can preheat the edge of the biodegradable film, making the edge part easier to deform and reducing rupture caused by edge stress concentration. At the same time, the lifting plate fits the top of the biodegradable film through the reaction force of the second spring, smoothing the surface of the biodegradable film, preventing wrinkles or relaxation during transportation, and further improving the processing quality of the film. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Shows an overall schematic diagram provided according to an embodiment of the present utility model;

[0024] Figure 2 Shown is a diagram according to an embodiment of the present invention. Figure 1 Another perspective of the picture;

[0025] Figure 3 A schematic diagram of an adjustment assembly provided according to an embodiment of the present utility model is shown;

[0026] Figure 4 A schematic diagram of an auxiliary component provided according to an embodiment of the present utility model is shown;

[0027] Figure 5 A schematic diagram of an anti-wrinkle assembly provided according to an embodiment of the present utility model is shown;

[0028] Figure 6 Shown is a diagram according to an embodiment of the present invention. Figure 5 Another perspective of the picture.

[0029] Legend:

[0030] 10. Frame; 11. Film feed roller; 12. Film discharge roller; 13. Pressing roller;

[0031] 20. Adjustment assembly; 21. First screw rod; 22. Lifting block; 23. First timing belt; 24. Servo motor; 25. Lifting component; 251. Second screw rod; 252. Second timing belt; 26. Auxiliary components; 261. Fixing bracket; 262. Arc block; 263. First spring;

[0032] 30. Anti-wrinkle assembly; 31. Mounting frame; 32. Moving frame; 33. Positive and negative threaded rods; 34. Lifting plate; 35. Insertion rod; 36. Second spring; 37. Heating element. DETAILED DESCRIPTION

[0033] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] like Figures 1-6 As shown, the utility model provides: a stretching device for biodegradable film processing, comprising a frame 10, two frames 10 are respectively provided with a film feed roller 11 and a film discharge roller 12 on both sides, the frame 10 is further provided with a pressure roller 13, the two sets of pressure rollers 13 are not on the same horizontal plane, the frame 10 is equipped with an adjustment component 20 capable of adjusting the height between the two sets of pressure rollers 13 to change the pulling force on the biodegradable film, and an anti-wrinkle component 30 capable of smoothing the biodegradable film and heating the edge to reduce the breakage of the biodegradable film caused by edge stress concentration is also equipped between the two frames 10. When in use, the biodegradable film is passed through the film feed roller 11, the pressure roller 13, the anti-wrinkle component 30, and the film discharge roller 12 in sequence, and the two sets of pressure rollers 13 play a stretching role on the transported biodegradable film;

[0035] The adjustment assembly 20 includes a first screw rod 21 symmetrically mounted on the frame 10, and a lifting block 22 is threadedly connected to the surface of the first screw rod 21. The lifting block 22 is slidably mounted on the frame 10. A first synchronous belt 23 is meshed between the two first screw rods 21 through a first gear. When one of the first screw rods 21 rotates, the meshing transmission of the first gear enables the first synchronous belt 23 to rotate, thereby enabling the two first screw rods 21 to rotate forward and reverse synchronously, and then enabling the two lifting blocks 22 to be lifted and lowered synchronously. A servo motor 24 is fixedly connected to one side of the frame 10, and the lifting block 22 is also equipped with a lifting component 25 that can adjust the distance between the two pressure rollers 13, and an auxiliary component 26 used in conjunction with the lifting component 25 to enable the biodegradable film to maintain tension during stretching.

[0036] like Figure 3-Figure 4 As shown, the lifting component 25 includes a support plate fixedly installed on one side of the lifting block 22. When the lifting block 22 is lifted or lowered, it will also drive the support plate to lift or lower. A second screw rod 251 is threadedly connected to the two support plates, and a second synchronous belt 252 is meshed between the two second screw rods 251 through a second gear. When one of the second screw rods 251 is rotating, the meshing transmission of the second gear enables the second synchronous belt 252 and the two second screw rods 251 to rotate synchronously.

[0037] In further detail, the surface of the second screw rod 251 is threadedly connected to a slider. When the second screw rod 251 rotates forward and backward, the slider also moves up and down. One of the pressure rollers 13 is rotatably mounted on the slider. There are two groups of pressure rollers 13, each group has two pressure rollers 13. One of the first screw rods 21 is fixedly mounted on the output end of the servo motor 24, and the servo motor 24 can drive the first screw rod 21 connected thereto to rotate.

[0038] When the stretching force on the biodegradable film needs to be changed, the two servo motors 24 are respectively started to drive the corresponding first screw 21 to start rotating. Through the meshing transmission of the first gear and the first synchronous belt 23, the lifting block 22 can drive each set of pressure rollers 13 to start moving. By adjusting the height difference between the two sets of pressure rollers 13, the stretching force on the biodegradable film can be changed.

[0039] If it is necessary to change the degree of pressure of the pressure roller 13 on the biodegradable film, the second screw rod 251 is rotated, and the second gear and the second synchronous belt 252 are engaged to drive the second screw rod 251 to rotate synchronously, thereby causing the slider to drive the pressure roller 13 connected thereto to rise and fall, thereby changing the distance between the two pressure rollers 13, thereby changing the resistance of the biodegradable film when passing through the pressure rollers 13, and being suitable for biodegradable films of different thicknesses;

[0040] It can be adjusted according to the thickness and material properties of the film. For thicker or thinner biodegradable films, the stretching force and distance can be adjusted separately to adapt to different processing requirements. It can ensure that the stress on the biodegradable film during the stretching process is evenly distributed, which helps to avoid local excessive or insufficient stretching, thereby improving the uniformity of the film. Uniform stretching can reduce defects in the biodegradable film, such as breakage, wrinkles or uneven thickness, which is crucial to improving the quality and performance of the biodegradable film.

[0041] like Figure 4 As shown, the auxiliary component 26 includes a fixing frame 261 fixedly mounted on one side of the support plate, and the arc block 262 is arranged between the two fixing frames 261 through a first spring 263;

[0042] The arc block 262 is slidably mounted between the two fixing frames 261;

[0043] When the biodegradable film is being transported, the top of the arc block 262 will contact the bottom of the biodegradable film through the reaction force of the first spring 263. Since the two sets of pressure rollers 13 are provided with auxiliary components 26, when the biodegradable film is being transported, the arc block 262 can push the biodegradable film upward from the bottom through the reaction force of the first spring 263. In conjunction with the two sets of pressure rollers 13, the biodegradable film will not become loose during transportation, avoiding unevenness or defects during the stretching process.

[0044] like Figure 5-Figure 6 As shown, the anti-wrinkle component 30 includes a mounting frame 31 fixedly mounted between the two frames 10, two movable frames 32 are arranged on the mounting frame 31 through positive and negative screw rods 33, and a lifting plate 34 is arranged between the two movable frames 32 through an insertion rod 35. A second spring 36 is fixedly installed between the insertion rod 35 and the movable frame 32, and the reaction force of the second spring 36 enables the insertion rod 35 to drive the movable frame 32 to reset. A heating element 37 is fixedly connected to the top of the inner wall of the movable frame 32. The heating element 37 is an electric heating wire in the prior art. A temperature controller is provided on one side of the mounting frame 31, and its model is E5CD-H. The controller can control the heating element 37 to heat the edge of the biodegradable film. Edge preheating can make the edge part of the biodegradable film more easily deformed during the stretching process, reduce the rupture caused by edge stress concentration, and improve the yield.

[0045] In further detail, the forward and reverse screw rods 33 are rotatably mounted on the bottom of the mounting frame 31, and the two movable frames 32 are threadedly mounted on both ends of the forward and reverse screw rods 33. By rotating the forward and reverse screw rods 33 forward and backward, the two movable frames 32 can move in opposite or opposite directions. The bottom ends of both sides of the movable frames 32 are rotatably connected to rollers. The rollers ensure that when the biodegradable film moves in the movable frame 32, it will not be worn or scratched by the edges of the movable frame 32.

[0046] When the biodegradable film moves in the movable rack 32, the insertion rod 35 uses the reaction force of the second spring 36 to enable the lifting plate 34 to fit the top of the biodegradable film, and the lifting plate 34 has a smoothing effect on the biodegradable film. At the same time, the temperature controller on one side of the mounting rack 31 is started, and the temperature controller controls the heating element 37 to heat the edge of the biodegradable film. The edge preheating can make the edge part of the biodegradable film easier to deform during the stretching process, reduce the breakage caused by edge stress concentration, and improve the yield rate.

[0047] In further detail, the insertion rod 35 is slidably mounted on the movable frame 32, and the middle portion of the lifting plate 34 is configured to be divided into two sections, which are slidably connected by an extension plate.

[0048] When the distance between the two movable racks 32 needs to be adjusted, the two movable racks 32 can be moved in relative or opposite directions by rotating the forward and reverse screw rods 33. During the movement, the size of the lifting plate 34 will also change. Through the extension plate in the middle, the middle part of the lifting plate 34 has a telescopic effect, so that the lifting plate 34 can move with the movable rack 32, thereby adapting to biodegradable films of different sizes.

[0049] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A stretching device for processing biodegradable films, comprising a frame (10), wherein two frames (10) are provided with a film feed roller (11) and a film discharge roller (12) on both sides thereof, and a pressing roller (13) is further provided on the frame (10), characterized in that: Also includes: The frame (10) is equipped with an adjustment component (20) capable of adjusting the height between the two sets of pressure rollers (13) to change the pulling force on the biodegradable film. An anti-wrinkle component (30) is also equipped between the two frames (10) to smooth the biodegradable film and heat the edge to reduce the rupture of the biodegradable film due to edge stress concentration. The adjustment assembly (20) includes a first screw rod (21) symmetrically mounted on the frame (10), a lifting block (22) is threadedly connected to the surface of the first screw rod (21), a first synchronous belt (23) is meshed between the two first screw rods (21) via a first gear, a servo motor (24) is fixedly connected to one side of the frame (10), and the lifting block (22) is also equipped with a lifting component (25) capable of adjusting the distance between the two pressure rollers (13), and an auxiliary component (26) used in conjunction with the lifting component (25) to enable the biodegradable film to maintain tension when stretched.

2. A stretching device for biodegradable film processing according to claim 1, characterized in that: The lifting component (25) comprises a support plate fixedly mounted on one side of the lifting block (22), and second screw rods (251) are threadedly connected to the two support plates. A second synchronous belt (252) is meshed between the two second screw rods (251) via a second gear.

3. A stretching device for biodegradable film processing according to claim 2, characterized in that: The surface of the second screw rod (251) is threadedly connected to a slider, one of the pressure rollers (13) is rotatably mounted on the slider, and one of the first screw rods (21) is fixedly mounted on the output end of the servo motor (24).

4. A stretching device for biodegradable film processing according to claim 1, characterized in that: The auxiliary component (26) includes a fixing frame (261) fixedly mounted on one side of the support plate, and the arc block (262) is arranged between the two fixing frames (261) via a first spring (263); The arc block (262) is slidably mounted between the two fixing frames (261).

5. The stretching device for biodegradable film processing according to claim 1, characterized in that: The anti-wrinkle assembly (30) includes a mounting frame (31) fixedly mounted between two frames (10), two movable frames (32) are arranged on the mounting frame (31) via positive and negative threaded rods (33), a lifting plate (34) is arranged between the two movable frames (32) via an insertion rod (35), a second spring (36) is fixedly mounted between the insertion rod (35) and the movable frame (32), and a heating element (37) is fixedly connected to the top of the inner wall of the movable frame (32).

6. A stretching device for biodegradable film processing according to claim 5, characterized in that: The forward and reverse threaded rods (33) are rotatably mounted on the bottom of the mounting frame (31), and the two movable frames (32) are threadedly mounted on both ends of the forward and reverse threaded rods (33). The bottom ends of both sides of the movable frames (32) are rotatably connected to rollers.

7. A stretching device for biodegradable film processing according to claim 6, characterized in that: The insertion rod (35) is slidably mounted on the movable frame (32), and the middle portion of the lifting plate (34) is divided into two sections, which are slidably connected via an extension plate.

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