Self-pulling unfolding device for plastic film

Abstract

The utility model discloses a self-pulling unfolding device for a plastic film, which relates to the technical field of plastic films and comprises a base, a hydraulic rod and an air cylinder. An air cylinder is fixedly installed in the base, the air cylinder penetrates through the top of the base and is fixedly connected with a movable plate, a pressing block is fixedly installed at the bottom of the movable plate, a movable rod is movably connected into the movable plate on one side of the pressing block, and a limiting block is fixedly installed at the bottom, penetrating through the movable plate, of the movable rod; pushing blocks are slidably installed at the bottoms of the movable plates on the two sides of the movable rod through compression springs, the top of the movable plate on one side of the movable rod is slidably connected with a clamping plate through a first spring, one side of the clamping plate on the top of the movable plate is attached to the movable rod, and a partition plate is movably installed at one end of the pressing block and the top of the movable plate on the other side through a second spring. By adjusting the position of the limiting block, the limiting position of the plastic film can be adjusted, the plastic film is prevented from being damaged due to the fact that the plastic film is limited at the same position all the time, and the stretching effect of the plastic film is prevented from being affected.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic films, in particular to a self-pulling unfolding device for plastic films. Background Art

[0002] Plastic film is a film made of polyvinyl chloride, polyethylene, polypropylene, polystyrene and other resins. It is used for packaging and as a coating layer. It has been widely used in food, medicine, chemical and other fields, bringing great convenience to people's lives.

[0003] In the process of pulling and unfolding the plastic film, the plastic film needs to be limited first, and then slowly pulled to both sides to unfold it. In the prior art, during stretching, the broken plastic film is easy to fall into the groove, which is inconvenient to clean. In addition, it is not convenient to limit one end of the film during installation, and the connection between the threaded rod and the film is easy to break during the stretching test, affecting the test effect.

[0004] A Chinese patent with publication number CN202727190U has been proposed in the prior art to solve the above-mentioned technical problems. The technical solution disclosed in the patent document is as follows: a hot air device for biaxially stretched plastic film, comprising a fan for supplying air and a motor for driving the fan, a heating system and a bellows group respectively connected to the fan, each of the fans being connected to one or more bellows groups, each of the bellows groups comprising two bellows arranged oppositely in upper and lower positions, a plurality of air jets being arranged on opposite surfaces of the bellows, the air flow direction of the air jets being perpendicular to the direction of the biaxially stretched plastic film, and a row of wind-blocking air jets being correspondingly arranged at the terminal of the two bellows of each bellows group, the air flow direction of the wind-blocking air jets being at a certain relative angle to the direction of the plastic film. The utility model effectively avoids the phenomenon of wind cross-talk between different heating sections, so that the heat or air volume of each functional section strictly meets the set value, ensuring the accuracy of parameter adjustment in the production process. However, after pulling the plastic film for a long time, the position where the plastic film is limited will usually become thinner and thinner, which will cause the position of the limit to be damaged, which will easily affect the effect of unfolding the plastic film, causing waste and having certain limitations. Summary of the invention

[0005] The purpose of the utility model is to provide a self-pulling unfolding device for a plastic film to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0007] A self-pulling unfolding device for a plastic film comprises a base, a hydraulic rod and a cylinder; a cylinder is fixedly installed inside the base, the cylinder passes through the top of the base and is fixedly connected to a movable plate, a pressure block is fixedly installed at the bottom of the movable plate, the movable plate on one side of the pressure block is movably connected to a movable rod, the movable rod passes through the bottom of the movable plate and is fixedly installed with a limiting block, push blocks are slidably installed at the bottom of the movable plates on both sides of the movable rod through compression springs, a clamping plate is slidably connected to the top of the movable plate on one side of the movable rod through a first spring, and one side of the clamping plate at the top of the movable plate is fitted with the movable rod, a partition is movably installed at one end of the pressure block and the top of the movable plate on the other side through a second spring, the two bases are movably connected through a telescopic frame, and the telescopic frame is located at both ends of the base, a hydraulic rod is rotatably installed on the top of the telescopic frame, and the hydraulic rod is rotatably connected to the base.

[0008] By installing the cylinder, the movable plate can be driven to move up and down on the top of the base, so that the pressure block can be driven to approach the plastic film to achieve extrusion and limitation of the plastic film. The limit block can be installed by using the movable rod, and the push block can be installed by using the compression spring. At the same time, the elastic force of the compression spring itself can be used to form a downward pressure on the push block. In the absence of an outer lining, the limit block can be squeezed downward, so that the limit block can limit the plastic film. The card plate can be installed by using the first spring, and the card plate can be squeezed to the other side by using the elastic force of the first spring itself. When the user manually pulls the movable rod upward, the card plate can be squeezed to the bottom of the outer ring of the movable rod by using the elastic force of the first spring, so that the limit block can be limited. The partition can be installed by using the second spring, and the partition can be squeezed by using the elastic force of the second spring. The two bases can be connected and fixed by using the telescopic frame. The telescopic frame itself is a telescopic structure. The telescopic frame can be driven to be telescopic by installing the hydraulic rod, so that the distance between the two bases can be adjusted, so as to achieve self-pulling and unfolding of the plastic film.

[0009] A further improvement of the technical solution of the utility model is that a plurality of balls are fixedly installed on the top of the limiting block on the periphery of the movable rod, and two of the balls are in contact with the bottom of the push block.

[0010] By adopting the above technical solution, the contact area between the top of the limit block and the push block and the movable plate can be reduced by using balls, thereby reducing the wear between the top of the limit block and the push block and the movable plate, and extending the service life of the limit block, the push block and the movable plate.

[0011] A further improvement of the technical solution of the utility model is that a first anti-slip pad is attached to the bottom of the pressing block.

[0012] By adopting the above technical solution, in this solution, the friction between the bottom of the pressing block and the plastic film can be increased by installing the first anti-slip pad, thereby improving the effect of subsequently pulling and unfolding the plastic film.

[0013] A further improvement of the technical solution of the utility model is that a second anti-slip pad is attached to the bottom of the limiting block.

[0014] By adopting the above technical solution, in this solution, the friction between the bottom of the limit block and the plastic film can be increased by installing the second anti-slip pad, thereby improving the effect of subsequently pulling and unfolding the plastic film.

[0015] A further improvement of the technical solution of the utility model is that a circular ring with a radius larger than that of the movable rod is fixed to the periphery of the movable rod, and the circular ring fits with the top of the movable plate.

[0016] By adopting the above technical solution, in this solution, the position of the movable rod inside the movable plate can be easily limited by installing the circular ring, so as to prevent the movable rod from falling off from the inside of the movable plate.

[0017] A further improvement of the technical solution of the utility model is that an arc groove corresponding to the shape of the movable rod is provided inside the movable plate.

[0018] The above technical solution is adopted. In this solution, the movable track of the movable rod can be guided and limited by providing an arc groove inside the movable plate, so that the limit block can be limited.

[0019] A further improvement of the technical solution of the utility model is that a paddle is fixedly installed on the top of the clamping plate.

[0020] The above technical solution is adopted. In this solution, the contact area between the user's hand and the card plate can be enlarged by installing the paddle, thereby facilitating manual movement and adjustment of the card plate.

[0021] A further improvement of the technical solution of the utility model is that a shifting block is fixedly installed on the top of the partition.

[0022] The above technical solution is adopted. In this solution, the contact area between the user's hand and the partition can be enlarged by installing the shift block, thereby facilitating manual movement and adjustment of the partition.

[0023] Due to the adoption of the above technical solution, the utility model has achieved the following technical progress compared with the prior art:

[0024] 1. The utility model provides a self-pulling unfolding device for a plastic film. After the plastic film is unfolded for a certain distance, the limit block is separated from the plastic film by pulling the movable rod upward, and then the limit block can be moved to one end or the other side of the pressing block along the arc groove, thereby changing the position of the limit block on the plastic film, preventing the limit block from being limited at the same position all the time and causing damage to the plastic film, and avoiding affecting the stretching effect of the plastic film.

[0025] 2. The utility model provides a self-pulling unfolding device for a plastic film, which can reduce the contact area between the top of the limit block and the push block and the movable plate by installing a ball, thereby reducing wear and extending the service life of the limit block, the push block and the movable plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be further described below in conjunction with the accompanying drawings.

[0027] Figure 1 It is a schematic diagram of the splicing structure of two bases of the utility model;

[0028] Figure 2 It is a schematic diagram of the partial structure of the movable plate section of the utility model;

[0029] Figure 3 It is a schematic diagram of the partial structure of the movable panel of the utility model from the second viewing angle;

[0030] Figure 4 For the utility model Figure 2 The enlarged structural diagram at A in the middle;

[0031] Figure 5 For the utility model Figure 3 Enlarged structural diagram at B in the middle.

[0032] In the figure: 1. base; 2. movable plate; 3. hydraulic rod; 4. cylinder; 5. telescopic frame; 6. movable rod; 7. clamping plate; 701. paddle; 8. pressure block; 801. first anti-slip pad; 9. push block; 10. limit block; 1001. second anti-slip pad; 1002. ball; 11. compression spring; 12. first spring; 13. partition; 1301. paddle block; 14. second spring. DETAILED DESCRIPTION

[0033] The present invention is further described in detail below in conjunction with the embodiments:

[0034] Example 1

[0035] like Figure 1 , Figure 4 and Figure 5As shown, the utility model provides a self-pulling unfolding device for a plastic film, comprising a base 1, a hydraulic rod 3 and a cylinder 4; the base 1 is fixedly installed with a cylinder 4 inside, the cylinder 4 penetrates the top of the base 1 and is fixedly connected with a movable plate 2, the bottom of the movable plate 2 is fixedly installed with a pressing block 8, the movable plate 2 on one side of the pressing block 8 is movably connected with a movable rod 6 inside, the movable rod 6 penetrates the bottom of the movable plate 2 and is fixedly installed with a limiting block 10, push blocks 9 are slidably installed at the bottom of the movable plate 2 on both sides of the movable rod 6 through compression springs 11, the top of the movable plate 2 on one side of the movable rod 6 is slidably connected with a clamping plate 7 through a first spring 12, and one side of the clamping plate 7 at the top of the movable plate 2 is connected to the movable rod 6 are fitted between, a partition 13 is movably installed on one end of the pressure block 8 and the top of the movable plate 2 on the other side through a second spring 14, the two bases 1 are movably connected through a telescopic frame 5, and the telescopic frame 5 is located at both ends of the base 1, a hydraulic rod 3 is rotatably installed on the top of the telescopic frame 5, and the hydraulic rod 3 is rotatably connected to the base 1, a plurality of balls 1002 are fixedly installed on the top of the limit block 10 on the periphery of the movable rod 6, two of which are fitted with the bottom of the push block 9, a circular ring larger than its own radius is fixed on the periphery of the movable rod 6, and the circular ring is fitted with the top of the movable plate 2, and an arc groove corresponding to the shape of the movable rod 6 is opened inside the movable plate 2.

[0036] In this embodiment, the movable plate 2 can be driven to move up and down on the top of the base 1 by installing the cylinder 4, so that the pressing block 8 can be driven to approach the plastic film to achieve extrusion and limitation of the plastic film. The limit block 10 can be installed by using the movable rod 6, and the push block 9 can be installed by using the compression spring 11. At the same time, the elastic force of the compression spring 11 itself can form a downward pressure on the push block 9. In the absence of an outer lining, the limit block 10 can be squeezed downward to limit the plastic film. The card plate 7 can be installed by using the first spring 12, and the elastic force of the first spring 12 itself can be used to squeeze the card plate 7 to the other side. When the user manually pulls the movable rod 6 upward, the elastic force of the first spring 12 can be used to squeeze the card plate 7 to the bottom of the outer ring of the movable rod 6, so that the limit block 10 can be Limiting, the partition 13 can be installed by using the second spring 14, and the partition 13 can be squeezed by using the elastic force of the second spring 14, and the two bases 1 can be connected and fixed by using the telescopic frame 5. The telescopic frame 5 itself is a telescopic structure. The telescopic frame 5 can be driven to be telescopic by installing the hydraulic rod 3, so that the distance between the two bases 1 can be adjusted, and the plastic film can be self-pulled and unfolded. The ball 1002 can be used to reduce the contact area between the top of the limit block 10 and the push block 9 and the movable plate 2, thereby reducing the wear between the top of the limit block 10 and the push block 9 and the movable plate 2, and extending the service life of the limit block 10, the push block 9 and the movable plate 2. By opening an arc groove inside the movable plate 2, the movable trajectory of the movable rod 6 can be guided and limited, so that the limit block 10 can be limited.

[0037] Example 2

[0038] like Figure 2 and Figure 4 As shown, based on Example 1, the utility model provides a technical solution: preferably, a first anti-slip pad 801 is attached to the bottom of the pressing block 8, and a second anti-slip pad 1001 is attached to the bottom of the limiting block 10.

[0039] In this embodiment, by installing the first anti-skid pad 801, the friction between the bottom of the pressing block 8 and the plastic film can be increased, and by installing the second anti-skid pad 1001, the friction between the bottom of the limiting block 10 and the plastic film can be increased, thereby improving the subsequent effect of pulling and unfolding the plastic film.

[0040] Example 3

[0041] like Figure 4 As shown, based on Example 1, the utility model provides a technical solution: preferably, a paddle 701 is fixedly installed on the top of the clamping plate 7.

[0042] In this embodiment, the contact area between the user's hand and the card plate 7 can be enlarged by installing the paddle 701, thereby facilitating manual movement and adjustment of the card plate 7.

[0043] Example 4

[0044] like Figure 5 As shown, based on Example 1, the utility model provides a technical solution: preferably, a shift block 1301 is fixedly installed on the top of the partition 13.

[0045] In this embodiment, the contact area between the user's hand and the partition 13 can be expanded by installing the shifting block 1301, thereby facilitating manual movement and adjustment of the partition 13.

[0046] The working principle of the self-pulling unfolding device of the plastic film will be described in detail below.

[0047] like Figure 1-Figure 5 As shown, the user places the plastic film in the middle of the top of the two bases 1, aligns the two pressing blocks 8 and the limiting blocks 10 with the top of the plastic film, and then uses the cylinder 4 to drive the movable plate 2 to move downward, so that the pressing block 8 and the limiting blocks 10 can be used to limit the plastic film, and then the hydraulic rod 3 is used to drive the telescopic frame 5 to extend and retract, so that the distance between the two bases 1 is continuously expanded, thereby realizing the automatic pulling and unfolding of the plastic film. After the plastic film is unfolded for a certain distance, the user can manually pull the movable rod 6 upward to separate the limiting blocks 10 from the plastic film, and then move the movable rod 6 along the arc groove opened on the surface of the movable plate 2. By driving the movable rod 6 to move, the limit block 10 can be moved to one end or the other side of the pressure block 8. The second spring 14 can just clamp the partition 13 at the bottom of the circular ring outside the movable rod 6. At the same time, the push block 9 is pressed upward by the ball 1002 to compress the compression spring 11. When it moves to the specified position, the user can manually push the push block 1301 outward. At this time, the elastic force of the compression spring 11 can be used to squeeze the push block 9 in the opposite direction, so that the limit block 10 can be squeezed downward to limit the plastic film, thereby changing the position of the limit block 10 limiting the plastic film, preventing the limit block 10 from being limited at the same position all the time and causing damage to the plastic film.

[0048] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not deviate from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A self-pull unfolding device for a plastic film, comprising a base (1), a hydraulic rod (3) and a cylinder (4); characterized in that: A cylinder (4) is fixedly installed inside the base (1), and the cylinder (4) passes through the top of the base (1) and is fixedly connected to a movable plate (2). A pressure block (8) is fixedly installed at the bottom of the movable plate (2). A movable rod (6) is movably connected inside the movable plate (2) on one side of the pressure block (8). A limit block (10) is fixedly installed on the bottom of the movable plate (2) on the movable rod (6). Push blocks (9) are slidably installed at the bottom of the movable plate (2) on both sides of the movable rod (6) via compression springs (11). The movable plate (6) on one side of the movable rod (6) 2) A card plate (7) is slidably connected to the top of the movable plate (2) through a first spring (12), and one side of the card plate (7) at the top of the movable plate (2) is in contact with the movable rod (6), a partition plate (13) is movably installed at one end of the pressure block (8) and the top of the movable plate (2) on the other side through a second spring (14), the two bases (1) are movably connected through a telescopic frame (5), and the telescopic frame (5) is located at both ends of the base (1), a hydraulic rod (3) is rotatably installed on the top of the telescopic frame (5), and the hydraulic rod (3) is rotatably connected to the base (1).

2. The self-pulling unfolding device of a plastic film according to claim 1, characterized in that: A plurality of balls (1002) are fixedly mounted on the top of the limiting block (10) on the periphery of the movable rod (6), two of which are in contact with the bottom of the pushing block (9).

3. The self-pulling unfolding device of a plastic film according to claim 1, characterized in that: A first anti-slip pad (801) is attached to the bottom of the pressing block (8).

4. The self-pulling unfolding device of a plastic film according to claim 1, characterized in that: A second anti-slip pad (1001) is attached to the bottom of the limiting block (10).

5. The self-pulling unfolding device of a plastic film according to claim 1, characterized in that: A circular ring with a radius larger than that of the movable rod (6) is fixed to the periphery of the movable rod (6), and the circular ring fits with the top of the movable plate (2).

6. A self-pulling unfolding device for a plastic film according to claim 5, characterized in that: An arc-shaped groove corresponding to the shape of the movable rod (6) is provided inside the movable plate (2).

7. The self-pulling unfolding device of a plastic film according to claim 1, characterized in that: A paddle (701) is fixedly mounted on the top of the clamping plate (7).

8. The self-pulling unfolding device of a plastic film according to claim 1, characterized in that: A shift block (1301) is fixedly mounted on the top of the partition (13).

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