Stretching device for detecting POF two-way stretching electrostatic film

Abstract

The utility model relates to the technical field of POF electrostatic film stretching detection, in particular to a stretching device for POF two-way stretching electrostatic film detection, which comprises an operation table, fixing plates fixedly connected to the left side and the right side of the top of the operation table, vertical plates fixedly connected to the tops of the fixing plates, and rotating shafts rotationally connected to the inner sides of the top ends of the vertical plates. The end, away from the vertical plate, of the rotating shaft is rotationally connected with a rotating plate, the end, away from the rotating shaft, of the rotating plate is fixedly connected with a concave plate, and the middle of the lower portion in the concave plate is spirally connected with a threaded rod. Through design cooperation, the contact area of the concave plate, the movable plate and the surface of the electrostatic film body is increased, and meanwhile the situation that when the electrostatic film body is stretched, the hard concave plate and the hard movable plate apply pressure to the two ends of the electrostatic film body is avoided; and the electrostatic film body in contact with the top end of the inner side of the concave plate is more quickly broken than normal pulling and breaking, so that the result accuracy of stretching detection on the electrostatic film body is improved to a certain extent.

Description

Technical Field

[0001] The utility model relates to the technical field of POF electrostatic film stretching detection, in particular to a stretching device for detecting POF biaxially stretched electrostatic film. Background Art

[0002] POF electrostatic film is a film made of polyolefin as the main raw material. It has electrostatic adsorption function and is usually used in packaging, protection, isolation and insulation.

[0003] The patent specification with announcement number CN219161799U discloses a stretching device for testing POF biaxially stretched electrostatic film, which relates to the field of electrostatic film stretching technology. It aims to solve the problem that the existing POF electrostatic film is mostly fixed at one end during stretching, and is stretched in one direction, with a limited stretching range. The fixed end is fixed by the winding extrusion force, which easily slips and loosens with the stretching roller after being stressed, resulting in inaccurate stretching results. The lower end of the stretching platform is provided with a support leg, and the center of the upper end of the stretching platform is provided with an adjustment roller. A first stretching roller is provided on one side of the adjustment roller, and a second stretching roller is provided on the other side of the adjustment roller. A POF electrostatic film is provided between the first stretching roller, the second stretching roller and the adjustment roller; it also includes: a fixed groove, which is provided on the surface of one side of the first stretching roller and the second stretching roller, and a metal plate is provided inside the fixed groove; a pointed cone column, which is provided inside the metal plate.

[0004] However, in the implementation of relevant technologies, it was found that the above-mentioned stretching device for detecting POF biaxially stretched electrostatic film has the following problems: the above-mentioned structure adopts a fixed groove and a metal plate to clamp the electrostatic film, and uses a limiting cover to squeeze and fix the electrostatic film on the inner side of the metal plate. This method is not only difficult to clamp according to electrostatic films of different thicknesses, but also the edges of the limiting cover and the metal plate are relatively sharp. When the first stretching roller and the second stretching roller stretch the electrostatic film by rotation, the electrostatic film in contact with the limiting cover and the metal plate will be subjected to a strong tensile force, which can easily cause the electrostatic film in contact with the limiting cover and the metal plate to break faster than the normal pulling and breaking speed, resulting in errors in subsequent results. In view of this, a stretching device for detecting POF biaxially stretched electrostatic film is provided to overcome the above-mentioned defects. Utility Model Content

[0005] The purpose of the utility model is to solve the shortcomings of the prior art and to propose a stretching device for detecting a POF biaxially stretched electrostatic film.

[0006] The top of the movable plate is fixedly provided with a screw bolt, and the top of the movable plate is fixedly provided with a screw bolt, and the movable plate is fixedly provided with a screw bolt.

[0007] As a further description of the above technical solution: the lower inner side of the concave plate contacts the outer end surface of the movable plate, the top of the top plate contacts the middle of the bottom of the electrostatic membrane body, the end of the fixed rod away from the winding drum is fixedly connected to the left and right rear sides of the bottom of the operating table, the left and right sides of the inside of the operating table are in contact with the surface of the wire rope, and the end of the wire rope away from the winding drum is fixedly connected to the middle of the top of the concave plate. The position of the movable plate and the second rubber plate on the inner side of the concave plate can be adjusted according to the thickness of different electrostatic membrane bodies. At the same time, it is avoided that the hard concave plate and movable plate exert pressure on the two ends of the electrostatic membrane body when the electrostatic membrane body is stretched, resulting in the force exerted by the top of the inner side of the concave plate on the electrostatic membrane body being greater than the pulling force, which easily causes the electrostatic membrane body in contact with the top of the inner side of the concave plate to break faster than the normal pulling break.

[0008] As a further description of the above technical solution: there are two concave plates, and the concave plates are distributed on the left and right sides of the top of the operating table. A semicircular arc is provided at the top inner side of the bottom of the concave plate, which can stretch the electrostatic film body in both directions at the same time. The arc set below the concave plate can avoid the electrostatic film body being stretched. The right-angled top below the concave plate continues to apply pressure on one side of the electrostatic film body, causing the electrostatic film body to break faster than the normal pulling speed, and there are errors in the test results.

[0009] As a further description of the above technical solution: the area of ​​the movable plate matches the area of ​​the lower inner side of the concave plate, the first rubber plate and the second rubber plate have the same area and thickness, and the area of ​​the second rubber plate is three-quarters of the top area of ​​the movable plate. The first rubber plate and the second rubber plate clamp the left and right ends of the electrostatic membrane body, effectively increasing the contact area between the concave plate, the movable plate and the surface of the electrostatic membrane body.

[0010] As a further description of the above technical solution: the vertical plate and the rotating plate are connected by a rotating shaft, and the rotating plate can be rotated one hundred and eighty degrees from the outside to the inside on the top of the vertical plate under the restriction of the rotating shaft, thereby achieving the stretching of the electrostatic film body, reducing production costs, and driving the stretching of the electrostatic film body by winding the wire rope instead of the traditional electric push rod.

[0011] As a further description of the above technical solution: a through hole is opened in the middle of the left and right sides of the operating table, and the diameter of the through hole matches the cross-sectional diameter of the wire rope, so that the winding drum located below the operating table can reel in the wire rope above the operating table, and the operator can also calculate the final stretching distance of the electrostatic membrane body through the position of the rope passing through the operating table.

[0012] As a further description of the above technical solution: the top of the top plate is provided with a semicircular arc, and a hole is opened in the middle of the operating table, and the diameter of the hole in the middle of the operating table matches the cross-sectional diameter of the output end of the hydraulic rod, which can improve the stretching detection range and detection flexibility, and is suitable for the detection of electrostatic membrane bodies of different lengths.

[0013] The utility model has the following beneficial effects:

[0014] The stretching device for detecting POF biaxially stretched electrostatic film designed by the present invention can adjust the position of the movable plate and the second rubber plate on the inner side of the concave plate according to the thickness of different electrostatic film bodies through design coordination. At the same time, the left and right ends of the electrostatic film body are clamped by the first rubber plate and the second rubber plate, which not only increases the contact area between the concave plate, the movable plate and the surface of the electrostatic film body, but also avoids the hard concave plate and the movable plate exerting pressure on the two ends of the electrostatic film body when the electrostatic film body is stretched, resulting in the force exerted by the top end of the inner side of the concave plate on the electrostatic film body being greater than the pulling force, which easily causes the electrostatic film body in contact with the top end of the inner side of the concave plate to break faster than the normal pulling and breaking speed, thereby improving the accuracy of the results of the stretching detection of the electrostatic film body to a certain extent. At the same time, the structure for stretching the electrostatic film body adopts a high-torque motor to drive the winding drum to wind up the steel wire rope, pulling the concave plate outward to achieve the stretching of the electrostatic film body, which not only reduces the production cost, but also replaces the traditional electric push rod to drive the electrostatic film body to stretch by winding the steel wire rope, and the operator can also calculate the final stretching distance of the electrostatic film body by passing the rope through the position of the operating table, which is suitable for popularization and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the exploded three-dimensional structure of the concave plate of the utility model;

[0017] Figure 3 This is a schematic diagram of the exploded three-dimensional structure of the take-up drum of the present invention;

[0018] Figure 4 This is a schematic diagram of the overall structure of the top plate of the present utility model.

[0019] Legend:

[0020] 1. Operating table; 2. Fixed plate; 3. Vertical plate; 4. Rotating shaft; 5. Rotating plate; 6. Concave plate; 7. Electrostatic film body; 8. Motor; 9. Winding drum; 10. Wire rope; 11. Hydraulic rod; 12. Top plate; 13. First rubber plate; 14. Threaded rod; 15. Movable plate; 16. Second rubber plate; 17. Fixed rod. DETAILED DESCRIPTION

[0021] Reference Figures 1-4 The utility model provides a stretching device for detecting POF biaxially stretched electrostatic film, comprising an operating table 1, wherein the operating table 1 is connected and fixed to a fixed plate 2 by bolts on the left and right sides of the top of the operating table 1, a vertical plate 3 is welded on the top of the fixed plate 2, a rotating shaft 4 is arranged on the inner side of the top of the vertical plate 3, a rotating plate 5 is arranged on the end of the rotating shaft 4 away from the vertical plate 3, a concave plate 6 is welded on the end of the rotating plate 5 away from the rotating shaft 4, a threaded rod 14 penetrates the middle of the lower part of the concave plate 6 and is spirally connected to the internal thread at the lower part of the concave plate 6, the top of the threaded rod 14 is connected to a movable plate 15 through a bearing, the top of the movable plate 15 is adhered to the second rubber plate 16 by adhesive, the first rubber plate 13 is adhered to the top of the inner side of the concave plate 6 by adhesive, the inner sides of the first rubber plate 13 and the second rubber plate 16 are in contact with the electrostatic film body 7, a motor 8 is fixed to the front of the left and right sides of the operating table 1 by bolts, the output shaft of the output end of the motor 8 is welded and fixed to the middle of the front end face of the winding drum 9, and the end of the winding drum 9 away from the motor 8 is connected to the fixing rod 17 through a bearing. The top of the top plate 12 contacts with the middle of the bottom of the electrostatic membrane body 7, and the fixed rod 17 is fixedly connected to the left and right rear sides of the bottom of the operating table 1.

[0022] As a further implementation plan of the above technical solution: the number of concave plates 6 is two, and the concave plates 6 are distributed on the left and right sides of the top of the operating table 1. A semicircular arc is provided at the inner top below the concave plate 6, which can simultaneously stretch the electrostatic film body 7 in both directions. The arc set below the concave plate 6 can avoid the electrostatic film body 7 being stretched. The right-angled top below the concave plate 6 continuously applies pressure to one side of the electrostatic film body 7, causing the electrostatic film body 7 to break faster than the normal pulling speed, resulting in errors in the test results.

[0023] As a further implementation plan of the above technical solution: the area of ​​the movable plate 15 matches the area of ​​the inner lower side of the concave plate 6, the first rubber plate 13 and the second rubber plate 16 have the same area and thickness, and the area of ​​the second rubber plate 16 is three-quarters of the top area of ​​the movable plate 15. The first rubber plate 13 and the second rubber plate 16 clamp the left and right ends of the electrostatic membrane body 7, effectively increasing the contact area between the concave plate 6, the movable plate 15 and the surface of the electrostatic membrane body 7.

[0024] As a further implementation plan of the above technical solution: the vertical plate 3 and the rotating plate 5 are connected by a rotating shaft 4, and the rotating plate 5 can be rotated one hundred and eighty degrees from the outside to the inside on the top of the vertical plate 3 under the restriction of the rotating shaft 4, so as to achieve the stretching of the electrostatic membrane body 7, reduce the production cost, and drive the electrostatic membrane body 7 to stretch by winding the wire rope 10 instead of the traditional electric push rod.

[0025] As a further implementation plan of the above technical solution: a through hole is opened in the middle of the left and right sides of the operating table 1, and the diameter of the through hole matches the cross-sectional diameter of the steel wire rope 10, so that the winding drum 9 located below the operating table 1 can wind up the steel wire rope 10 above the operating table 1, and the operator can also calculate the final stretching distance of the electrostatic membrane body 7 through the position of the rope passing through the operating table 1.

[0026] As a further implementation plan of the above technical solution: a semicircular arc is provided on the top of the top plate 12, and a hole is opened in the middle of the operating table 1, and the diameter of the hole in the middle of the operating table 1 matches the cross-sectional diameter of the output end of the hydraulic rod 11, which can improve the stretching detection range and detection flexibility, and is suitable for the detection of electrostatic membrane bodies 7 of different lengths.

[0027] Working principle:

[0028] When using the utility model, the electrostatic film body 7 is cut into a rectangular shape, and the two ends of the electrostatic film are placed on the inner side of the concave plate 6 on the top of the operating table 1. At this time, the electrostatic film contacts the second rubber plate 16 at the lower inner side of the concave plate 6. At this time, the threaded rod 14 at the bottom of the concave plate 6 is rotated. The threaded rod 14 uses the middle of the lower inner side of the concave plate 6 as the base point to drive the movable plate 15 to move upward. At this time, the electrostatic film body 7 is pushed upward by the movable plate 15 and the second rubber plate 16 until the electrostatic film body 7 contacts the first rubber plate 13 above the inner side of the concave plate 6 and is clamped and fixed, and then stops. Then, the motors 8 on the left and right sides below the operating table 1 are turned on, and the motors 8 drive the winding of the top front end of the fixed rod 17 The drum 9 rotates at a constant speed, and the steel wire rope 10 fixed on the outside of the winding drum 9 pulls the other end of the top of the concave plate 6. At this time, the concave plate 6 and the rotating plate 5 are pulled by the steel wire rope 10 and rotate outward at the top of the vertical plate 3 with the rotating shaft 4 as the base point. At this time, the electrostatic film body 7 is also stretched due to the angular rotation of the concave plate 6. Until the concave plate 6 is in the outer position of the top of the vertical plate 3, the stretching of the electrostatic film body 7 is completed. If it is necessary to stretch the electrostatic film body 7 to break, open the hydraulic rod 11 at the lower middle part of the operating table 1, and the hydraulic rod 11 drives the top plate 12 to push up. At this time, the top plate 12 drives the center of the electrostatic membrane body 7 to support upward from bottom to top until the electrostatic membrane body 7 breaks.

[0029] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A stretching device for testing POF biaxially stretched electrostatic film, comprising an operating table (1), characterized in that: The left and right sides of the top of the operating table (1) are fixedly connected to fixed plates (2), the top of the fixed plate (2) is fixedly connected to a vertical plate (3), the inner side of the top of the vertical plate (3) is rotatably connected to a rotating shaft (4), the end of the rotating shaft (4) away from the vertical plate (3) is rotatably connected to a rotating plate (5), the end of the rotating plate (5) away from the rotating shaft (4) is fixedly connected to a concave plate (6), the middle of the lower part of the concave plate (6) is spirally connected to a threaded rod (14), the top of the threaded rod (14) is rotatably connected to a movable plate (15), the top of the movable plate (15) is fixedly connected to a second rubber plate (16), the concave plate ( 6) A first rubber plate (13) is fixedly connected to the upper inner side, and the inner sides of the first rubber plate (13) and the second rubber plate (16) are in contact with the electrostatic film body (7). A motor (8) is fixedly connected to the front of the left and right sides below the operating table (1), and the output end of the motor (8) is fixedly connected to a winding drum (9). The end of the winding drum (9) away from the motor (8) is rotatably connected to a fixed rod (17), and a steel wire rope (10) is fixedly connected to the surface of the winding drum (9). A hydraulic rod (11) is fixedly connected to the lower middle part of the operating table (1), and the output end of the hydraulic rod (11) is fixedly connected to a top plate (12).

2. A stretching device for detecting a POF biaxially stretched electrostatic film according to claim 1, characterized in that: The lower inner side of the concave plate (6) contacts the outer end surface of the movable plate (15), the top end of the top plate (12) contacts the middle of the bottom of the electrostatic film body (7), the end of the fixed rod (17) away from the winding drum (9) is fixedly connected to the left and right rear sides of the lower side of the operating table (1), the left and right sides of the interior of the operating table (1) are in contact with the surface of the wire rope (10), and the end of the wire rope (10) away from the winding drum (9) is fixedly connected to the middle of the top of the concave plate (6).

3. A stretching device for detecting a POF biaxially stretched electrostatic film according to claim 1, characterized in that: The number of the concave plates (6) is two, and the concave plates (6) are distributed on the left and right sides of the top of the operating table (1), and a semicircular arc is provided at the top inner side of the lower side of the concave plates (6).

4. The stretching device for detecting a POF biaxially stretched electrostatic film according to claim 1, characterized in that: The area of ​​the movable plate (15) matches the area below the inner side of the concave plate (6); the area and thickness of the first rubber plate (13) and the second rubber plate (16) are the same, and the area of ​​the second rubber plate (16) is three quarters of the top area of ​​the movable plate (15).

5. The stretching device for detecting a POF biaxially stretched electrostatic film according to claim 1, characterized in that: The vertical plate (3) and the rotating plate (5) are connected by a rotating shaft (4), and the rotating plate (5) can rotate 180 degrees from the outside to the inside on the top of the vertical plate (3) under the restriction of the rotating shaft (4).

6. The stretching device for detecting a POF biaxially stretched electrostatic film according to claim 1, characterized in that: Through holes are provided in the middle of the left and right sides of the operating table (1), and the diameter of the through holes matches the diameter of the cross section of the steel wire rope (10).

7. The stretching device for detecting a POF biaxially stretched electrostatic film according to claim 1, characterized in that: The top of the top plate (12) is provided with a semicircular arc, and a hole is opened in the middle of the operating table (1), and the diameter of the hole in the middle of the operating table (1) matches the cross-sectional diameter of the output end of the hydraulic rod (11).

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