Auxiliary device for testing the puncture resistance of polyolefin films

Abstract

The present invention discloses an auxiliary device for testing the puncture resistance of polyolefin films, specifically in the field of polyolefin films, comprising a test base, an extension plate fixedly connected to one side of the test base, a storage slot provided at the top of the extension plate, a curved plate fixedly connected to the top and left and right sides of the storage slot, a curved surface a provided on one side of the upper surface of the curved plate, and two limit posts symmetrically distributed on the left and right sides of the top of the extension plate. The present invention provides a curved plate, a curved surface a, an arc-shaped curved plate, and a curved surface b, and utilizes the curved surfaces a and b to fully unfold and press the edges and corners of the polyolefin film, thereby avoiding the problem of shrinkage or damage of the polyolefin film caused by existing clamp fixing methods or fixing methods squeezed by heavy objects. The polyolefin film is fully unfolded by the curved surfaces a and b, so that when a needle punctures the polyolefin film, the force is evenly applied to all parts of its surface, thereby ensuring the accuracy of the data measured after the puncture.

Description

Technical Field

[0001] The present invention relates to the technical field of polyolefin films, and more particularly to an auxiliary device for testing the puncture resistance of polyolefin films. Background Art

[0002] Polyolefin refers to olefin polymers, a general term for a class of thermoplastic resins obtained by the polymerization or copolymerization of α-olefins such as ethylene, propylene, 1-butene, 1-pentene, 1-hexene, 1-octene, 4-methyl-1-pentene, and certain cycloolefins; polyolefin film refers to a film made of polyolefin; before polyolefin film leaves the factory, it is particularly involved in puncture test experiments on the polyolefin film in order to measure the puncture resistance data and other basic properties of each batch of products.

[0003] Existing test auxiliary devices use clamps or heavy objects to fix the polyolefin film. The clamp fixation method will cause the end of the polyolefin film to be fixed to shrink, and the heavy object squeeze fixation method will cause the corners of the polyolefin film to wrinkle or be damaged; and when the polyolefin film is stretched, the polyolefin film will be unevenly stressed, resulting in inaccurate data obtained after puncture. Summary of the Invention

[0004] In order to overcome the above-mentioned defects of the prior art, an embodiment of the present invention provides an auxiliary device for testing the puncture resistance of polyolefin films. By setting an arc plate, an arc surface a, an arc bent plate and an arc surface b, the arc surface a and the arc surface b are used to fully unfold the edges and corners of the polyolefin film and press them together, avoiding the problem of wrinkling or damage of the polyolefin film caused by the existing clamp fixing method or the fixing method of heavy object squeezing. The polyolefin film is fully unfolded by the arc surface a and the arc surface b, so that when the needle punctures the polyolefin film, the force is evenly distributed on its surface, ensuring the accuracy of the data measured after puncture, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a polyolefin film puncture resistance performance test auxiliary device, comprising a test base, an extension plate fixedly connected to one side of the test base, a storage groove provided at the top of the extension plate, an arc-shaped plate fixedly connected to the top of the extension plate and on both the left and right sides of the storage groove, an arc surface a provided on one side of the upper surface of the arc plate, two limiting columns symmetrically distributed on the left and right sides of the top of the extension plate, the arc surface a on the surface of the arc plate is used to place the polyolefin film, and an arc bent plate is provided on one side of the arc plate, and the arc bent plate is used for pressing The polyolefin film, both sides of the inner part of the arc-shaped bent plate are provided with through holes a, the top of the arc-shaped bent plate is provided with a curved surface b on the side close to the arc-shaped plate, and the curved surface b is maintained at the same horizontal height as the curved surface a, the inner side of the arc-shaped plate is fixedly connected to a connecting plate, one end of the connecting plate is provided with a mounting hole, a damping shaft is embedded and installed inside the mounting hole, the shaft surface of the damping shaft is interference-fitted with a connecting seat, the surface of the connecting seat is provided with a through hole b, one end of the connecting seat is fixedly connected to the curved plate, and the curved plate and the convex parts of the arc-shaped plate are distributed in a mirror image;

[0006] The arc plate and the arc-bent plate are overall in an arc-shaped structure, the midpoint of the convex part of the arc plate points to the midpoint of the concave part of the arc-bent plate, the arc surface a is in an inclined surface structure, and the transverse cross-section of the inclined surface is parabolic, the bottom end of the arc surface a gradually extends to the surface of the arc plate, and is seamlessly connected to the arc plate, the concave shape of the arc surface b is the same as that of the arc surface a, the arc surface b and the arc surface a have the same curvature at all locations, the entire arc surface b completely covers the surface of the arc surface a, and the center of the arc plate coincides with the center of the arc bent plate;

[0007] A curved surface is provided on a surface of one side of the curved plate away from the arc-shaped plate, and the structure of the curved plate is the same as that of the arc-shaped plate.

[0008] In a preferred embodiment, both ends of the arc-shaped plate are provided with rounded corner surfaces a, and both ends of the arc-shaped bent plate are provided with rounded corner surfaces b.

[0009] In a preferred embodiment, the top of the test base is fixedly connected to the puncture tester body, and ventilation slots are provided on one side of the surface of the puncture tester body in a rectangular shape. A lifting slide is detachably installed on one side of the puncture tester body, and the bottom end of the lifting slide is fixedly connected to a stabilizing plate, and the bottom end of the stabilizing plate is fixedly connected to an adjustment column, and an adjustment knob is detachably installed on the surface of the adjustment column, and a puncture needle is detachably installed on the bottom end of the adjustment column.

[0010] In a preferred embodiment, the total area of ​​the arc surface a occupies two-thirds of the side surface of the arc plate, and the number of the arc surfaces a is two.

[0011] In a preferred embodiment, the inner wall of the through hole b is matched with the surface of the damping shaft, and the shaft-hole matching tolerance range between the two is -0.015mm to -0.005mm.

[0012] The technical effects and advantages of the present invention are as follows:

[0013] The present invention provides an arc-shaped plate, an arc surface a, an arc-bent plate, and an arc surface b, and utilizes the arc surface a and the arc surface b to fully expand and press the edges and corners of the polyolefin film, thereby avoiding the problem of shrinkage or damage of the polyolefin film caused by existing clamp fixing methods or fixing methods squeezed by heavy objects. The polyolefin film is fully expanded by the arc surface a and the arc surface b, so that when the needle punctures the polyolefin film, the force is evenly applied to all parts of the surface, thereby ensuring the accuracy of the data measured after the puncture. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0015] Figure 2 This is a schematic diagram of the assembly of the lifting slide and the puncture needle of the present invention;

[0016] Figure 3 This is a schematic diagram of the assembly of the arc plate and the curved plate of the present invention;

[0017] Figure 4 Schematic diagram of the splitting of two sets of arc-shaped bent plates of the present invention;

[0018] Figure 5 This is a schematic diagram of the assembly of the curved bent plate and the curved plate of the present invention;

[0019] Figure 6 Schematic diagram of the splitting of the arc plate and the curved plate of the present invention;

[0020] Figure 7 This is a schematic diagram of the partial polyolefin film fixing state of the present invention.

[0021] The accompanying drawings are marked as follows: 1. test base; 2. extension plate; 3. storage slot; 4. arc plate; 5. arc surface a; 6. limit column; 7. arc bent plate; 8. through hole a; 9. arc surface b; 10. connecting plate; 11. damping shaft; 12. connecting seat; 13. through hole b; 14. bent plate; 15. rounded surface a; 16. rounded surface b; 17. puncture tester body; 18. ventilation slot; 19. lifting slide; 20. stabilizing plate; 21. adjustment column; 22. adjustment knob; 23. puncture needle. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments 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.

[0023] As attached Figure 1 With attached Figure 7The auxiliary device for testing the puncture resistance of polyolefin membranes shown in the figure comprises a test base 1, an extension plate 2 is fixedly connected to one side of the test base 1, a storage groove 3 is provided at the top of the extension plate 2, and the setting of the storage groove 3 prevents the puncture needle 23 from piercing into the interior of the extension plate 2 during operation, so as to ensure the safety of the puncture needle 23 during operation, and an arc plate 4 is fixedly connected to the top of the extension plate 2 and located on the left and right sides of the storage groove 3, and an arc surface a5 is provided on one side of the upper surface of the arc plate 4. The setting of the arc surface a5 is conducive to the full expansion of the edges and corners of the polyolefin membrane, and two limiting columns 6 are symmetrically distributed on the left and right sides of the top of the extension plate 2. The setting of the limiting columns 6 ensures that the arc bend The plate 7 is precisely fitted to the surface of the curved plate 4 from top to bottom, which helps to avoid the curved plate 7 from moving after being fitted to the surface of the curved plate 4. The curved surface a5 on the surface of the curved plate 4 is used to place the polyolefin film. A curved curved plate 7 is provided on one side of the curved plate 4. The curved curved plate 7 is used to press the polyolefin film. Through the above arrangement, the edges and corners of the polyolefin film are fully unfolded and pressed, avoiding the problem of shrinkage or damage of the polyolefin film caused by the existing clamp fixing method or the fixing method of heavy objects squeezing. Through holes a8 are provided on both sides of the interior of the curved plate 7. A curved surface b9 is provided on the top side of the curved plate 7 close to the curved plate 4, and the curved surface b9 is maintained at the same horizontal height as the curved surface a5. By keeping the horizontal height consistent, the fitting effect between the arc surface b9 and the arc surface a5 is ensured. A connecting plate 10 is fixedly connected to the inner side of the arc plate 4. A mounting hole is provided at one end of the connecting plate 10. A damping shaft 11 is embedded in the interior of the mounting hole. The setting of the mounting hole is conducive to connecting the damping shaft 11 with the connecting plate 10. A connecting seat 12 is interference-fitted on the shaft surface of the damping shaft 11. A through hole b13 is provided on the surface of the connecting seat 12. A bent plate 14 is fixedly connected to one end of the connecting seat 12. The bent plate 14 and the bulge of the arc plate 4 are mirror-imaged. Through the setting of the bent plate 14, one end of the polyolefin membrane to be tested can be lifted up and At the same time, the curved surface provided at one end of the bending plate 14 is in flexible contact with the polyolefin film, thereby ensuring that the polyolefin film is lifted up evenly without damaging the polyolefin film. For example, if the bending plate 14 is rotated 30° through the damping shaft 11, the angle of the left end of the polyolefin film relative to the overall horizontal plane will be lifted up by 30°, and conversely, the angle of the right end of the polyolefin film relative to the overall horizontal plane will be lifted up by 30° (the angle value range of the bending plate 14 that can be rotated through the damping shaft 11 is between 0° and 90°, and the operator can adjust any angle of the polyolefin film as required to measure different angles), so that the device can measure parameter data of the polyolefin film at different angles at the left and right ends;

[0024] The curved plate 4 and the curved bent plate 7 are of an arc-shaped structure as a whole, and the midpoint of the convex part of the curved plate 4 points to the midpoint of the concave part of the curved bent plate 7. Through the above-mentioned setting, the accuracy during the coordinated use is guaranteed, the polyolefin film is fully unfolded, and the force on the surface of the polyolefin film is uniform. The curved surface a5 is of an inclined surface structure, and the transverse cross-section of the inclined surface is parabolic. By setting the inclined surface in a parabolic shape, it is convenient for the polyolefin film to be unfolded. The bottom end of the curved surface a5 gradually extends to the surface of the curved plate 4 and is seamlessly connected to the curved plate 4. The concave shape of the curved surface b9 is the same as that of the curved surface a5, and the curvature of the curved surface b9 and the curved surface a5 are the same. Through the above-mentioned setting, even if relative displacement occurs during the fixation, the pressing effect of the polyolefin film can be guaranteed. The entire curved surface b9 completely covers the surface of the curved surface a5, and the center of the curved plate 4 coincides with the center of the curved curved plate 7.

[0025] The curved plate 14 is provided with a curved surface on one side away from the curved plate 4. The structure of the curved plate 14 is the same as that of the curved plate 4. The above arrangement avoids the problem of damage to the polyolefin film when the polyolefin film is lifted.

[0026] Both ends of the arc plate 4 are provided with rounded corners a15, and both ends of the arc bent plate 7 are provided with rounded corners b16. The top of the test base 1 is fixedly connected to the puncture tester body 17. One side of the surface of the puncture tester body 17 is provided with ventilation slots 18 in a rectangular distribution. The setting of the ventilation slots 18 is conducive to the transfer of heat inside the puncture tester body 17 and the external air to ensure the normal operation of the puncture tester body 17 when working. A lifting slide 19 is detachably installed on one side of the puncture tester body 17. The bottom end of the lifting slide 19 is fixedly connected to a stabilizing plate 20, and the bottom end of the stabilizing plate 20 is fixedly connected to an adjustment column 21. The surface of the adjustment column 21 is detachably mounted with an adjustment knob 22, and the bottom end of the adjustment column 21 is detachably mounted with a puncture needle 23. The above arrangement facilitates adjustment of the position of the puncture needle 23 to facilitate puncture testing of the polyolefin film. The total arc surface area of ​​the arc surface a5 occupies two-thirds of the side surface of the arc plate 4. There are two arc surfaces a5. The inner wall of the through hole b13 is matched with the surface of the damping shaft 11, and the shaft hole matching tolerance range between the two is -0.015mm to -0.005mm. The above arrangement facilitates ensuring a predetermined friction force between the two, and is not easily affected by external forces and causes the bending plate 14 to rotate.

[0027] The working process of the present invention is as follows:

[0028] The first step: first, place the polyolefin film to be tested flat on the upper surface of the two groups of curved plates 4, and ensure that the center of the polyolefin film is flush with the center point of the distance between the two groups of curved plates 4, so that the curved surface a5 on the surface of the curved plate 4 is placed on one end of the polyolefin film, and then align the through hole a8 opened on the surface of the curved bent plate 7 with the top of the limiting column 6 for connection, and then the curved bent plate 7 will move from top to bottom on the surface of the limiting column 6. While moving, the curved surface b9 on the surface of the curved bent plate 7 will be used to press the polyolefin film, and after moving to a certain distance, the curved surface b9 will adapt to the curved surface a5 to avoid wrinkles at the corners of the polyolefin film when pressing the polyolefin film, and then move the lower surface of the curved bent plate 7 to connect with one side of the upper surface of the test base 1, so that the polyolefin film can be fixed on the surface of the curved plate 4, and ensure that the curved bent plate 7 will not be affected by external force and move, so that the polyolefin film is evenly stressed and will not be damaged;

[0029] Step 2: Then, the existing component passes through the inside of the storage slot 3 to move any one of the bending plates 14 upwards to a certain angle, and then the bending plate 14 will push up one end of the polyolefin film to be tested. Because both ends of the bending plate 14 are rounded, when the polyolefin film is lifted, one end of the polyolefin film will not be damaged. Then, the lifting slide 19 inside the puncture tester is started to drive the puncture needle 23 to move from top to bottom until the puncture needle 23 penetrates the polyolefin film to be tested, and the puncture resistance performance data of the polyolefin film can be obtained. When puncture data at different angles need to be obtained, it is only necessary to restore the bending plate 14 that was moved for the first time to its original position, and then use the existing component to move the other bending plate 14 to a certain angle. At this time, the angle formed by the polyolefin film and the puncture needle 23 can be changed, and the puncture resistance data at different angles can be measured;

[0030] Step 3: When the test is completed, turn off the puncture tester, and then move the two sets of curved plates 7 upward until they are moved out of the surface of the limit column 6. At this time, the polyolefin film to be tested can be removed from the surface of the curved plate 4. Finally, the staff records the test results.

[0031] Secondly: The drawings of the embodiments disclosed in the present invention only involve structures related to the embodiments disclosed in the present invention. Other structures may refer to conventional designs. The same embodiment and different embodiments of the present invention may be combined with each other without conflict.

[0032] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, 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 polyolefin film puncture resistance test auxiliary device, comprising a test base, characterized in that: An extension plate is fixedly connected to one side of the test base, a storage groove is provided at the top of the extension plate, and an arc plate is fixedly connected to the top of the extension plate and on the left and right sides of the storage groove, a curved surface a is provided on one side of the upper surface of the curved plate, and two limiting columns are symmetrically distributed on the left and right sides of the top of the extension plate, the curved surface a on the surface of the curved plate is used to place a polyolefin film, an arc bent plate is provided on one side of the curved plate, and the arc bent plate is used to press the polyolefin film, and both sides of the inner part of the arc bent plate are provided with Through hole a, a curved surface b is provided on the top of the arc-shaped bent plate near the side of the arc-shaped plate, and the curved surface b is maintained at the same horizontal height as the curved surface a, a connecting plate is fixedly connected to the inner side of the arc-shaped plate, a mounting hole is provided at one end of the connecting plate, a damping shaft is embedded and installed inside the mounting hole, a connecting seat is interference-fitted on the shaft surface of the damping shaft, a through hole b is provided on the surface of the connecting seat, one end of the connecting seat is fixedly connected to the curved plate, and the curved plate and the convex parts of the arc-shaped plate are mirror-imaged; The arc plate and the arc-bent plate are overall in an arc-shaped structure, the midpoint of the convex part of the arc plate points to the midpoint of the concave part of the arc-bent plate, the arc surface a is in an inclined surface structure, and the transverse cross-section of the inclined surface is parabolic, the bottom end of the arc surface a gradually extends to the surface of the arc plate, and is seamlessly connected to the arc plate, the concave shape of the arc surface b is the same as that of the arc surface a, the arc surface b and the arc surface a have the same curvature at all locations, the entire arc surface b completely covers the surface of the arc surface a, and the center of the arc plate coincides with the center of the arc bent plate; A curved surface is provided on a surface of one side of the curved plate away from the arc-shaped plate, and the structure of the curved plate is the same as that of the arc-shaped plate.

2. The auxiliary device for testing the puncture resistance of polyolefin films according to claim 1, characterized in that: Both ends of the arc-shaped plate are provided with rounded corner surfaces a, and both ends of the arc-shaped bent plate are provided with rounded corner surfaces b.

3. The auxiliary device for testing the puncture resistance of polyolefin films according to claim 1, characterized in that: The top of the test base is fixedly connected to the puncture tester body, and one side of the surface of the puncture tester body is provided with ventilation slots in a rectangular shape. A lifting slide is detachably mounted on one side of the puncture tester body, and the bottom end of the lifting slide is fixedly connected to a stabilizing plate, and the bottom end of the stabilizing plate is fixedly connected to an adjustment column, and an adjusting knob is detachably mounted on the surface of the adjustment column, and a puncture needle is detachably mounted on the bottom end of the adjustment column.

4. The auxiliary device for testing the puncture resistance of polyolefin films according to claim 1, characterized in that: The total area of ​​the arc surface a occupies two-thirds of the side surface of the arc plate, and the number of the arc surfaces a is two.

5. The auxiliary device for testing the puncture resistance of polyolefin films according to claim 1, characterized in that: The inner wall of the through hole b is matched with the surface of the damping shaft, and the shaft-hole matching tolerance range between the two is -0.015mm to -0.005mm.

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