Stretching structure for polyethylene film processing

Abstract

The utility model relates to the technical field of stretching and winding mechanisms, and discloses a stretching structure for polyethylene film processing, which comprises a winding vehicle, a rotatable mounting connecting frame is arranged in the winding vehicle, and two groups of movable connecting frames are arranged on the upper side wall surface of the mounting connecting frame. And a winding roller capable of rotating is arranged between the close wall surfaces of the two groups of movable connecting frames. When a winding roller is fully wound with a polyethylene film, an installation connecting frame rotates anticlockwise, the upper side ends of two sets of movable connecting frames are turned leftwards, two sets of supporting sliding rods can drive sliding rolling balls to rotate, and the two sets of sliding rolling balls can move along the wall faces making contact with limiting connecting plates on the same side till the sliding rolling balls move to the inclined faces of the limiting connecting plates; and when the sliding rolling balls rotate downwards along the inclined faces of the limiting connecting plates, first springs start to extend, the two movable connecting frames move away from each other, and the two connecting clamping columns start to be away from the interiors of the connecting clamping grooves in the same side till the two connecting clamping columns are separated from the connecting clamping grooves in the same side, so that disassembly of the winding roller is achieved.

Description

Technical Field

[0001] This utility model relates to the field of stretching and winding mechanism technology, and in particular to a stretching structure for processing polyethylene film. Background Technology

[0002] Stretch film machines are mainly used for producing unidirectional stretched polyethylene plastic films (stretch film, wrap film) and food preservation films. They consist of three parts: the main machine, auxiliary machines, and electrical control systems.

[0003] The film is stretched by a stretching mechanism, and the take-up roller assembly is also part of the film stretching structure. The take-up roller rotates to wind up the film. After the film is fully wound, the take-up roller needs to be removed from the take-up assembly. Before removal, the operator needs to manually remove the take-up roller locking mechanism to remove the take-up roller. This operation is cumbersome and inconvenient for operators.

[0004] Therefore, we propose a stretching structure for processing polyethylene film. Utility Model Content

[0005] The present invention aims to solve the technical problems existing in the prior art and provide a stretching structure for processing polyethylene film.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a stretching structure for polyethylene film processing, comprising a winding carriage, the interior of which is provided with a rotatable mounting frame. Two sets of movable frames are provided on the upper side wall of the mounting frame. A rotatable winding roller is disposed between the adjacent walls of the two sets of movable frames. Each of the adjacent walls of the two sets of movable frames is rotatably mounted with a positioning connecting pin. The front and rear walls of the winding roller are provided with limiting connecting slots. Both sets of connecting pins are adapted to the two sets of connecting slots, and both sets of connecting pins are movably engaged in the same... Inside the side connecting slot, two sets of movable connecting frames are fixedly installed with limiting support slide rods on the walls away from each other. Sliding ball bearings are rotatably installed on the walls away from each other of the two sets of supporting slide rods. Limiting plates are fixedly installed on the front and rear walls of the winding car. The outer walls of the two sets of sliding ball bearings away from the supporting slide rods on the same side are in frictional contact with the limiting plates on the same side. The bottom walls of the left ends of the two sets of limiting plates are inclined surfaces, and the two inclined surfaces are in a state of decreasing from top to bottom. A first spring is provided on the walls close to each other of the two sets of movable connecting frames. The first spring is in a compressed state. A material receiving mechanism is provided inside the winding car.

[0007] Preferably, the lower sidewalls of both sets of movable connecting frames are fixedly equipped with connecting sliders that can be limited, and the upper sidewalls of the mounting frames are provided with connecting grooves that can be limited. Both sets of connecting sliders are adapted to the interior of the connecting grooves, and the outer walls of the connecting sliders are movably inserted into the interior of the connecting grooves. The first spring is located inside the connecting grooves and is fixedly installed on the walls of the two sets of connecting sliders that are close to each other.

[0008] Preferably, a horizontally positioned connecting slide rod is fixedly installed inside the connecting slide groove. The outer wall of the connecting slide rod movably passes through the front and rear walls of the two sets of connecting slide blocks, and the outer wall of the connecting slide rod movably passes through the interior of the first spring.

[0009] Preferably, the receiving mechanism includes a placement box, which is disposed inside the winding carriage. A support column is fixedly installed on the lower side wall of the placement box, and an installation base is fixedly installed on the bottom wall inside the winding carriage cavity.

[0010] Preferably, the outer wall of the support column extends through the upper side wall of the mounting base, and a matching connecting slide plate is movably installed inside the mounting base, with the support column fixedly installed on the upper side wall of the connecting slide plate.

[0011] Preferably, a winding carriage limiting plate is fixedly installed on the upper side wall of the mounting frame, and both sets of connecting slide rods are located inside the winding carriage limiting plate. The winding carriage limiting plate is concave, and the outer walls of both sets of supporting slide rods movably penetrate through the vertical ends close to the limiting plate.

[0012] Preferably, a second spring is fixedly installed on the lower side wall of the connecting slide and the adjacent wall of the mounting base cavity, and the connecting slide is set in a horizontal state.

[0013] This invention provides a stretching structure for processing polyethylene film. It has the following advantages:

[0014] 1. This utility model relates to a stretching structure for processing polyethylene film. During use, when the take-up roller is fully wound with polyethylene film, the mounting bracket rotates counterclockwise, causing the upper ends of the two sets of movable brackets to flip to the left. The two sets of support slide rods rotate with the sliding balls, which move along the wall surface in contact with the same-side limiting plate until they reach the inclined surface of the limiting plate. As the sliding balls rotate downwards along the inclined surface of the limiting plate, the first spring begins to extend, causing the two sets of movable brackets to move away from each other. The two sets of connecting pins begin to move away from the inside of the same-side connecting slot until the two sets of connecting pins separate from the same-side connecting slot, thus disassembling the take-up roller without the need for manual disassembly, which facilitates the use of the device.

[0015] 2. This is a tensile structure for processing polyethylene film. During use, when the two sets of moving frames move, the two sets of connecting sliders will move along the outer wall of the connecting slide rod inside the connecting slide groove, improving the stability of the movement of the two sets of moving frames. In addition, after the take-up roller is released, the outer wall of the take-up roller and the outer wall of the placement box approach each other. Due to gravity, the take-up roller will fall and contact the inner wall of the placement box. The placement box will move downward under force, and the support column will move downward with the connecting slide plate. The second spring will be compressed and generate elastic force, which will buffer the force on the connecting slot and play a buffering role. Attached Figure Description

[0016] Figure 1 This is a perspective view of the entire utility model;

[0017] Figure 2 This is a perspective view of the winding vehicle of this utility model;

[0018] Figure 3 for Figure 2 Enlarged view of point A;

[0019] Figure 4 for Figure 3 Enlarged view of B in the middle;

[0020] Figure 5 for Figure 2 A magnified view of C.

[0021] Legend: 1. Rewinding carriage; 2. Mounting frame; 3. Moving frame; 4. Rewinding roller; 5. Supporting slide bar; 6. Sliding ball; 7. Connecting pin; 8. Connecting slot; 9. Limiting plate; 10. First spring; 11. Connecting slider; 12. Connecting groove; 13. Connecting slide bar; 14. Supporting column; 15. Mounting base; 16. Connecting slide plate; 17. Second spring; 18. Placement box. Detailed Implementation

[0022] Example 1: A stretching structure for processing polyethylene film, such as Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the device includes a winding carriage 1, inside which is a rotatable mounting frame 2. Two sets of movable frames 3 are mounted on the upper wall of the mounting frame 2. A rotatable winding roller 4 is positioned between the two sets of movable frames 3 near each other. Connecting posts 7 for positioning are rotatably mounted on the walls of both sets of movable frames 3 near each other. Connecting slots 8 for limiting movement are provided on the front and rear walls of the winding roller 4. Both sets of connecting posts 7 are adapted to the two sets of connecting slots 8, and both sets of connecting posts 7 are movably engaged into the interior of the connecting slots 8 on the same side. The two sets of movable frames 3 are positioned away from each other. Each wall surface is fixedly equipped with a limiting support slide bar 5. Sliding ball bearings 6 are rotatably installed on the wall surfaces of the two sets of supporting slide bars 5 that are far apart. Limiting connecting plates 9 are fixedly installed on the front and rear walls of the winding car 1. The outer walls of the two sets of sliding ball bearings 6 that are far away from the supporting slide bars 5 on the same side are in frictional contact with the limiting connecting plates 9 on the same side. The bottom wall surfaces of the left ends of the two sets of limiting connecting plates 9 are inclined surfaces. The two sets of inclined surfaces are in a state of decreasing from top to bottom. The wall surfaces of the two sets of moving connecting frames 3 that are close to each other are provided with a first spring 10. The first spring 10 is set in a compressed state. The winding car 1 is equipped with a material receiving mechanism inside.

[0023] During use, when the take-up roller 4 is fully wound with polyethylene film, the mounting bracket 2 rotates counterclockwise, causing the upper ends of the two sets of movable brackets 3 to flip to the left. The two sets of support slide rods 5 will rotate with the sliding balls 6, and the two sets of sliding balls 6 will move along the wall surface that contacts the same-side limiting plate 9 until the sliding balls 6 move to the inclined surface of the limiting plate 9. When the sliding balls 6 rotate downward along the inclined surface of the limiting plate 9, the first spring 10 begins to extend, the two sets of movable brackets 3 move away from each other, and the two sets of connecting pins 7 begin to move away from the inside of the same-side connecting slot 8 until the two sets of connecting pins 7 and the same-side connecting slot 8 separate, thus realizing the disassembly of the take-up roller 4.

[0024] Example 2: Based on Example 1, as follows Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, the lower side walls of both sets of movable connecting frames 3 are fixedly equipped with connecting sliders 11 that can be limited, and the upper side wall of the mounting frame 2 is provided with a connecting groove 12 that can be limited. Both sets of connecting sliders 11 are adapted to the interior of the connecting groove 12. The outer walls of the connecting sliders 11 are movably inserted into the interior of the connecting groove 12. The first spring 10 is located inside the connecting groove 12 and is fixedly installed on the wall surface of the two sets of connecting sliders 11 that are close to each other.

[0025] A horizontally positioned connecting slide rod 13 is fixedly installed inside the connecting slide groove 12. The outer wall of the connecting slide rod 13 moves through the front and rear walls of the two sets of connecting slide blocks 11, and the outer wall of the connecting slide rod 13 moves through the interior of the first spring 10.

[0026] The receiving mechanism includes a placement box 18, which is located inside the winding car 1. A support column 14 is fixedly installed on the lower side wall of the placement box 18, and an installation base 15 is fixedly installed on the bottom wall inside the winding car 1 cavity.

[0027] The outer wall of the support column 14 extends through the upper side wall of the mounting base 15. A matching connecting slide plate 16 is movably installed inside the mounting base 15, and the support column 14 is fixedly installed on the upper side wall of the connecting slide plate 16.

[0028] The upper side wall of the mounting frame 2 is fixedly installed with a winding carriage 1 limiting plate 9. Both sets of connecting slide rods 13 are located inside the winding carriage 1 limiting plate 9. The winding carriage 1 limiting plate 9 is concave. The outer walls of both sets of supporting slide rods 5 can be moved through the vertical ends close to the limiting plate 9.

[0029] A second spring 17 is fixedly installed on the lower side wall of the connecting slide plate 16 and the adjacent wall inside the cavity of the mounting base 15, so that the connecting slide plate 16 is set in a horizontal state.

[0030] During use, when the two sets of movable connecting frames 3 move, the two sets of connecting sliders 11 will move along the outer wall of the connecting slide rod 13 inside the connecting slide groove 12, which improves the stability of the movement of the two sets of movable connecting frames 3. In addition, after the take-up roller 4 is released, the outer wall of the take-up roller 4 and the outer wall of the placement box 18 approach each other. Due to gravity, the take-up roller 4 will fall and contact the inner wall of the placement box 18. The placement box 18 will move downward under force, and the support column 14 will move downward with the connecting slide plate 16. The second spring 17 will be compressed and generate elastic force to buffer the force on the connecting slot 8.

[0031] 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 stretching structure for processing polyethylene film, comprising a winding carriage (1), wherein a rotatable mounting bracket (2) is provided inside the winding carriage (1), characterized in that: Two sets of movable connecting frames (3) are provided on the upper side wall of the mounting frame (2). A rotatable take-up roller (4) is provided between the two sets of movable connecting frames (3) and the adjacent wall surfaces. A positioning connecting pin (7) is rotatably installed on the adjacent wall surfaces of the two sets of movable connecting frames (3). A limiting connecting groove (8) is provided on the front and rear wall surfaces of the take-up roller (4). The two sets of connecting pins (7) are adapted to the two sets of connecting grooves (8). The two sets of connecting pins (7) are movably inserted into the interior of the connecting groove (8) on the same side. A limiting support is fixedly installed on the distant wall surfaces of the two sets of movable connecting frames (3). The two sets of support slide rods (5) are rotatably mounted on the walls that are far apart from each other. The front and rear walls of the winding car (1) are fixedly mounted with limit plates (9). The outer walls of the two sets of sliding balls (6) that are far away from the support slide rods (5) on the same side are in frictional contact with the limit plates (9) on the same side. The bottom walls of the left side of the two sets of limit plates (9) are inclined. The two sets of inclined surfaces are in a state of decreasing from top to bottom. The walls of the two sets of moving frames (3) that are close to each other are provided with first springs (10). The first springs (10) are in a compressed state. The winding car (1) is equipped with a receiving mechanism inside.

2. The stretching structure for polyethylene film processing according to claim 1, characterized in that: Both sets of movable connecting frames (3) are fixedly installed with connecting sliders (11) that can be limited. The upper side wall of the mounting frame (2) is provided with a connecting groove (12) that can be limited. Both sets of connecting sliders (11) are adapted to the inside of the connecting groove (12). The outer wall of the connecting slider (11) is movably inserted into the inside of the connecting groove (12). The first spring (10) is located inside the connecting groove (12). The first spring (10) is fixedly installed on the wall surface of the two sets of connecting sliders (11) that are close to each other.

3. The stretching structure for polyethylene film processing according to claim 2, characterized in that: The connecting slide (12) is fixedly installed with a horizontally arranged connecting slide rod (13). The outer wall of the connecting slide rod (13) moves through the front and rear walls of the two sets of connecting slide blocks (11), and the outer wall of the connecting slide rod (13) moves through the interior of the first spring (10).

4. The stretching structure for polyethylene film processing according to claim 3, characterized in that: The receiving mechanism includes a placement box (18), which is located inside the winding car (1). A support column (14) is fixedly installed on the lower side wall of the placement box (18), and an installation base (15) is fixedly installed on the bottom wall inside the winding car (1).

5. The stretching structure for polyethylene film processing according to claim 4, characterized in that: The outer wall of the support column (14) can be movably inserted through the upper side wall of the mounting base (15). The mounting base (15) is movably installed with a matching connecting slide plate (16). The support column (14) is fixedly installed on the upper side wall of the connecting slide plate (16).

6. The stretching structure for polyethylene film processing according to claim 1, characterized in that: The upper side wall of the mounting frame (2) is fixedly installed with a winding carriage (1) limiting plate (9). Both sets of connecting slide rods (13) are located inside the winding carriage (1) limiting plate (9). The winding carriage (1) limiting plate (9) is concave. The outer walls of both sets of supporting slide rods (5) are movable through the vertical ends close to the limiting plate (9).

7. The stretching structure for polyethylene film processing according to claim 5, characterized in that: A second spring (17) is fixedly installed on the lower side wall of the connecting slide plate (16) and the adjacent wall of the mounting base (15) cavity, and the connecting slide plate (16) is set in a horizontal state.

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