Clamp for testing bursting strength of film

Abstract

The utility model relates to a clamp for testing a film, in particular to a clamp for testing bursting strength of the film, which comprises a lower mounting plate and an upper mounting plate, a fixing seat is fixedly arranged on the lower mounting plate, and a clamp is fixedly arranged between the fixing seat and the upper mounting plate. The clamp comprises a lower fixing plate fixedly arranged at the center of the top of the fixing base and further comprises an upper fixing plate fixedly arranged at the center of the bottom of the upper mounting plate, a film is placed on the lower fixing plate, and a plurality of flattening plates used for preliminarily flattening the film are rotationally arranged on the outer wall of the upper fixing plate in an annular array mode. Pneumatic devices are fixedly arranged on the lower mounting plate and located on the two sides of the fixing base, output shafts of the pneumatic devices are fixedly connected with the upper mounting plate, the pneumatic devices are driven to enable the output shafts of the pneumatic devices to stretch out and draw back, the upper mounting plate is driven to move up and down, and therefore the upper fixing plate moves along with the pneumatic devices, and automatic up-down movement of the upper fixing plate is achieved; the clamping and loosening operation of the film is facilitated, and the testing efficiency is improved.

Description

Technical Field

[0001] This utility model relates to a clamp for testing thin films, and more particularly to a clamp for testing the bursting strength of thin films. Background Technology

[0002] In the performance testing of thin film materials, bursting strength is an important indicator of their resistance to rupture, especially in fields such as geotextiles, packaging materials, and protective materials. In traditional testing methods, the design and performance of the fixtures directly affect the accuracy and stability of the test results.

[0003] Chinese patent CN217819712U, entitled "A Horizontal Stretching Film Monitoring Test Stand," is a utility model that simulates the actual stretching process of a film, facilitating the monitoring of the film on the test stand, analyzing the causes of film rupture, and solving the technical problems of excessive cost and difficulty in debugging monitoring equipment when directly building a test stand for monitoring parameter testing and adjustment in actual production lines.

[0004] However, the film is prone to wrinkles or unevenness during clamping, which reduces the accuracy and reliability of the test. Utility Model Content

[0005] The main objective of this invention is to provide a fixture for testing the bursting strength of a thin film, in order to solve the problems raised in related technologies.

[0006] To achieve the above objectives, according to one aspect of the present invention, a clamp for testing the bursting strength of a film is provided, comprising a lower mounting plate and an upper mounting plate. A fixed seat is fixedly disposed on the lower mounting plate, and a clamp is fixedly disposed between the fixed seat and the upper mounting plate. The clamp includes a lower fixed plate fixedly disposed at the top center of the fixed seat and an upper fixed plate fixedly disposed at the bottom center of the upper mounting plate. A film is placed on the lower fixed plate, and a plurality of smoothing plates for initially smoothing the film are rotatably disposed in a circular array on the outer wall of the upper fixed plate. Pneumatic devices are fixedly disposed on both sides of the fixed seat on the lower mounting plate, and the output shaft of the pneumatic devices is fixedly connected to the upper mounting plate.

[0007] Furthermore, a connecting ring is slidably provided on the outer side of the lower fixing plate, and two connecting blocks are symmetrically fixedly connected to the inner wall of the connecting ring. Two sliding grooves are symmetrically opened on the outer side of the lower fixing plate, and the connecting blocks are slidably installed in the sliding grooves. A spring is fixedly provided in the sliding grooves, with one end of the spring fixedly connected to the bottom wall of the sliding groove and the other end fixedly connected to the side wall of the connecting block.

[0008] Furthermore, the fixing base has a groove, which is annular, and the lower end of the connecting ring is slidably disposed in the groove.

[0009] Furthermore, a fixing ring is fixedly connected to the bottom of the upper fixing plate, and the inner and outer diameters of the fixing ring are the same as those of the connecting ring.

[0010] Furthermore, the top of the lower fixing plate and the bottom of the upper fixing plate are symmetrically magnetically connected with insert strips, the lower fixing plate is symmetrically provided with slots, the insert strips are magnetically connected to the slots, and the lower fixing plate is provided with arc-shaped grooves communicating with the slots on both sides of the slots.

[0011] Furthermore, the insertion end of the insert is made of a rigid material, the other end is made of a flexible material, and the thickness of the insert is greater than the depth of the slot.

[0012] Furthermore, the outer wall of the upper fixed plate is fixedly provided with a number of limiting blocks in a circular array, one end of the flat plate is rotatably installed in the limiting block, and the other end of the flat plate is embedded with a number of ball bearings on the side near the fixed seat.

[0013] Furthermore, a through hole is provided through the upper mounting plate, clamp, and fixing base, which is used for the needle to pass through and to perform a puncture strength test on the film.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. In this clamp for testing the bursting strength of a film, the output shaft of the pneumatic device is fixedly connected to the upper mounting plate. By driving the pneumatic device to extend and retract its output shaft, the upper mounting plate moves up and down, thereby moving the upper fixed plate accordingly. This realizes the automated up and down movement of the upper fixed plate, which facilitates the clamping and releasing of the film and improves testing efficiency.

[0016] 2. In this kind of clamp for testing the bursting strength of a film, the outer wall of the upper fixed plate is rotatably arranged in a ring array with several smoothing plates for initially smoothing the film. Several ball bearings are embedded and rotatably arranged on the other end of the smoothing plate near the fixed seat. During the downward movement of the upper fixed plate, the lower end of the smoothing plate gradually moves outward from the fixed seat, and the ball bearings roll on the surface of the film, effectively smoothing the film. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the clamp for testing the bursting strength of a thin film in a preferred embodiment of the present invention;

[0018] Figure 2 This is a cross-sectional view of the clamp for testing the bursting strength of a thin film in a preferred embodiment of this utility model;

[0019] Figure 3 This is a cross-sectional view of the lower fixing plate connection structure in a preferred embodiment of the present invention;

[0020] Figure 4For the preferred embodiment of the utility model Figure 3 The structure amplification schematic view at A in the middle

[0021] Figure 5 For the preferred embodiment of the utility model Figure 3 The structure amplification schematic view at B in the middle

[0022] Figure 6 The sectional view of the upper fixed plate connecting structure in the preferred embodiment of the utility model

[0023] Figure 7 For the preferred embodiment of the utility model Figure 6 The structure amplification schematic view at C in the middle

[0024] Reference signs:

[0025] 1, lower mounting plate; 2, upper mounting plate; 21, through hole; 3, fixed seat; 31, groove;

[0026] 4, clamp; 41, lower fixed plate; 411, connecting ring; 412, connecting block; 413, sliding slot; 414, spring; 415, arc-shaped groove; 416, insertion strip;

[0027] 42, upper fixed plate; 421, fixed ring; 422, limiting block; 423, smoothing plate; 424, ball;

[0028] 5, pneumatic device. DETAILED DESCRIPTION

[0029] In order to further illustrate the technical means and effects adopted by the utility model to achieve the predetermined utility model purposes, the specific embodiments, structures, features and effects according to the utility model are described in detail as follows in combination with the drawings and preferred embodiments.

[0030] The embodiment provides a clamp for film top breaking strength test, which comprises a lower mounting plate 1 and an upper mounting plate 2, a fixed seat 3 is fixedly arranged on the lower mounting plate 1, a clamp 4 is fixedly arranged between the fixed seat 3 and the upper mounting plate 2, the clamp 4 comprises a lower fixed plate 41 fixedly arranged at the top center of the fixed seat 3, and further comprises an upper fixed plate 42 fixedly arranged at the bottom center of the upper mounting plate 2, a film is placed on the lower fixed plate 41, the outer wall of the upper fixed plate 42 is rotationally arranged with a plurality of smoothing plates 423 for initially smoothing the film in an annular array, pneumatic devices 5 are fixedly arranged on the lower mounting plate 1 and located on both sides of the fixed seat 3, and the output shaft of the pneumatic device 5 is fixedly connected with the upper mounting plate 2.

[0031] As Figure 1 Figure 2 ​As shown in the drawings, the pneumatic device 5 is preferably a pneumatic cylinder, the output shaft of which is fixedly connected with the upper mounting plate 2, and the output shaft of the pneumatic device 5 is driven to extend or retract, thereby driving the upper mounting plate 2 to move up and down, so as to drive the upper fixed plate 42 to move; when the film is subjected to the puncture strength test, the film needs to be fixed, and the film is first placed on the lower fixed plate 41, and then the output shaft of the pneumatic device 5 is driven to retract, thereby driving the upper mounting plate 2 and the upper fixed plate 42 to move downward, and the film is clamped and fixed between the upper fixed plate 42 and the lower fixed plate 41.

[0032] As shown in the drawings, Figure 3 and Figure 4 As shown in the drawings, the outer side of the lower fixed plate 41 is slidably provided with a connecting ring 411, the inner wall of the connecting ring 411 is fixedly connected with two connecting blocks 412 in a symmetrical manner, the outer side of the lower fixed plate 41 is symmetrically provided with two sliding grooves 413, the connecting blocks 412 are slidably installed in the sliding grooves 413, and springs 414 are fixedly arranged in the sliding grooves 413, one end of each spring 414 is fixedly connected with the bottom wall of the sliding groove 413, and the other end is fixedly connected with the side wall of the connecting block 412.

[0033] As shown in the drawings, Figure 3 and Figure 4 As shown in the drawings, a recess 31 is formed in the fixed seat 3, the recess 31 is annular, and the lower end of the connecting ring 411 is slidably arranged in the recess 31.

[0034] As shown in the drawings, Figure 2 and Figure 6 As shown in the drawings, the bottom of the upper fixed plate 42 is fixedly connected with a fixed ring 421, the inner diameter and the outer diameter of the fixed ring 421 are the same as those of the connecting ring 411, so that the two can be perfectly matched when they interact; during the process that the output shaft of the pneumatic device 5 is driven to retract, thereby driving the upper mounting plate 2 and the upper fixed plate 42 to move downward, the fixed ring 421 contacts the connecting ring 411 and gradually applies downward pressure to the connecting ring 411, so that the lower end of the fixed ring 421 slides to the bottom of the recess 31, and the connecting blocks 412 move downward along the sliding grooves 413 and compress the springs 414, until the bottom wall of the upper fixed plate 42 is in close contact with the film on the lower fixed plate 41; during the process, the film can be effectively stretched, and such stretching not only helps to eliminate wrinkles and unevenness that may be generated during the placement of the film, but also improves the accuracy and reliability of the film in the puncture strength test.

[0035] As shown in the drawings, Figure 3 and Figure 5As shown, the top of the lower fixing plate 41 and the bottom of the upper fixing plate 42 are symmetrically provided with plug strips 416 by magnetic attraction, the lower fixing plate 41 is symmetrically provided with plug slots, the bottom of the plug slot and the insertion end of the plug strip 416 are fixedly provided with magnetic blocks, the plug strip 416 is magnetically attracted and inserted into the plug slot, and through the interaction of magnetic force, the stable connection between the plug strip 416 and the plug slot is realized, which not only ensures the convenience of installation, but also ensures the stability during the test process; the arc-shaped grooves 415 in communication with the plug slots are arranged on both sides of the lower fixing plate 41, the curvature of the arc-shaped grooves 415 is designed according to the principle of ergonomics, so that the operator can easily insert his fingers into the arc-shaped grooves 415, thereby conveniently taking or adjusting the plug strip 416. Whether it is installation or disassembly of the plug strip 416, this design greatly simplifies the operation process and improves the work efficiency; the installation mode of the plug strip 416 at the bottom of the upper fixing plate 42 is the same as that of the plug strip 416 at the top of the lower fixing plate 41.

[0036] As shown in Figure 3 and Figure 5 , the insertion end of the plug strip 416 is made of hard material, such as high-strength plastic or metal alloy, which ensures the stability and positioning accuracy of the plug strip 416 when inserted into the plug slot, and is not easy to shift or deform due to external force, and the other end is made of flexible material, such as silica gel, rubber or other materials, which not only has good elasticity and flexibility, but also can provide gentle support when contacting the film, avoiding damage to the film, so that the plug strip 416 can better adapt to films of different thickness, material and surface characteristics, and increase the contact area with the film through slight deformation, thereby significantly enhancing the friction between the two without damaging the film; and the thickness of the plug strip 416 is greater than the depth of the plug slot, and the appropriate plug strip 416 is selected according to the characteristics of the film to be tested, the length of the plug strip 416 extending out of the plug slot is 0-3mm, which not only ensures the effective contact between the plug strip 416 and the film, but also further improves the friction by increasing the unevenness of the contact surface.

[0037] As shown in Figure 1 , Figure 2 , Figure 6 and Figure 7As shown, the size of the film placed on the lower fixed plate 41 is greater than the outer diameter of the connecting ring 411, so the outer part of the film naturally falls on the fixed seat 3. The outer wall of the upper fixed plate 42 is annularly arranged with a plurality of limiting blocks 422. One end of the flattening plate 423 is rotatably installed in the limiting block 422, and the other end of the flattening plate 423 is rotatably embedded on the side close to the fixed seat 3. The flattening plate 423 is inclined outward by 30-60 degrees under the condition of no external force. Before the fixed ring 421 contacts the connecting ring 411, as the upper mounting plate 2 moves downward, the ball 424 at the lower end of the flattening plate 423 contacts the film on the fixed seat 3. As the upper fixed plate 42 continues to move downward, the flattening plate 423 rotates around the hinge point of the limiting block 422, that is, the lower end of the flattening plate 423 gradually moves outward of the fixed seat 3. In this process, the ball 424 rolls on the surface of the film, which not only effectively stretches the film, but also quickly and effectively solves the unevenness of the film when placed. The contact between the ball 424 and the film effectively avoids the possibility of friction and wear caused by direct contact between the flattening plate 423 and the film. First, the film is flattened by the flattening plate 423, and then the film is stretched by the connecting ring 411 and the fixed ring 421, which not only improves the accuracy of the test, but also makes the entire test process smoother and more efficient.

[0038] As shown in Figure 2 , Figure 3 and Figure 6 , a through hole 21 is formed through the upper mounting plate 2, the clamp 4 and the upper end of the fixed seat 3. The through hole 21 is used for the needle to pass through and test the puncture strength of the film. When the film is firmly clamped in the clamp 4, the needle is gradually inserted into the through hole 21 to test the puncture of the film. During the insertion of the needle, the puncture force on the film gradually increases until it reaches the critical point of rupture.

[0039] The utility model discloses in specific use, according to the characteristics of the film to be measured selects suitable insertion strip 416 and inserts into the slot, places the film to be measured on the lower fixed plate 41, and the film outside portion naturally falls on the fixed seat 3, starts the pneumatic device 5, drives its output shaft to contract, drives the upper mounting plate 2 and the upper fixed plate 42 to move down, the ball 424 of the smoothing plate 423 lower end annular array rotation setting of the upper fixed plate 42 outer wall first contacts the film on the fixed seat 3 in the upper fixed plate 42 moving down process, with the upper fixed plate 42 continue to move down, the smoothing plate 423 rotates around its hinge point with the limiting block 422, the lower end of smoothing plate 423 gradually moves to the outside of fixed seat 3, the ball 424 rolls on the film surface, and effectively stretches the film, when the upper fixed plate 42 continues to move down, the fixed ring 421 contacts the connecting ring 411 and gradually applies the downward pressure to the connecting ring 411, makes the lower end of fixed ring 421 slide to the recess 31 bottom of fixed seat 3, the connecting block 412 moves down along the slide groove 413 that the lower fixed plate 41 outside is opened symmetrically, and the spring 414 in the slide groove 413 is compressed, until the bottom wall of upper fixed plate 42 and the film on the lower fixed plate 41 are in close contact, in this process, the film is effectively stretched, which helps to improve the accuracy and reliability of the film in the top breaking strength test, and the film is stably clamped between the upper fixed plate 42 and the lower fixed plate 41, then gradually penetrates the through-hole 21 using the lancet, and the film is top breaking test.

[0040] The above is only the preferred embodiment of the utility model, and does not limit the utility model in any form, although the utility model has disclosed the above with the preferred embodiment, however, it is not used to limit the utility model, any person skilled in the art, without departing from the technical scheme range of the utility model, can make some more changes or modifications of equivalent embodiment with the disclosed technical content, but as long as it does not depart from the technical scheme content of the utility model, according to the technical essence of the utility model, any brief introduction modification, equivalent change and modification of the above embodiment, still belongs to the range of the technical scheme of the utility model.

Claims

1. A fixture for film burst strength testing, comprising a lower mounting plate (1) and an upper mounting plate (2), a fixed seat (3) is fixedly arranged on the lower mounting plate (1), characterized in that, The fixed seat (3) is fixedly provided with a clamp (4) between the upper mounting plate (2), the clamp (4) comprises a lower fixed plate (41) fixedly arranged at the top center of the fixed seat (3), and further comprises an upper fixed plate (42) fixedly arranged at the bottom center of the upper mounting plate (2), the lower fixed plate (41) is used for placing the film, and the outer wall of the upper fixed plate (42) is annularly arranged with a plurality of smoothing plates (423) for preliminarily smoothing the film, the pneumatic device (5) is fixedly arranged on the lower mounting plate (1) and located on both sides of the fixed seat (3), and the output shaft of the pneumatic device (5) is fixedly connected with the upper mounting plate (2).

2. The fixture for film burst strength testing of claim 1, wherein, The outer side of the lower fixed plate (41) is slidably provided with a connecting ring (411), the inner wall of the connecting ring (411) is fixedly connected with two connecting blocks (412) in a symmetrical manner, two sliding grooves (413) are symmetrically formed in the outer side of the lower fixed plate (41), the connecting blocks (412) are slidably installed in the sliding grooves (413), and springs (414) are fixedly arranged in the sliding grooves (413), one end of the spring (414) is fixedly connected with the bottom wall of the sliding groove (413), and the other end is fixedly connected with the side wall of the connecting block (412).

3. The fixture of claim 2, wherein, The fixed seat (3) is provided with a groove (31), the groove (31) is annular, and the lower end of the connecting ring (411) is slidably arranged in the groove (31).

4. The fixture of claim 2, wherein The bottom of the upper fixed plate (42) is fixedly connected with a fixed ring (421), and the inner diameter and the outer diameter of the fixed ring (421) are the same as the inner diameter and the outer diameter of the connecting ring (411).

5. The fixture of claim 1, wherein The top of the lower fixed plate (41) and the bottom of the upper fixed plate (42) are symmetrically and magnetically inserted with an insertion strip (416), symmetrically formed insertion grooves are formed in the lower fixed plate (41), the insertion strip (416) is magnetically inserted into the insertion grooves, and arc-shaped grooves (415) are formed in the lower fixed plate (41) and located on both sides of the insertion grooves and in communication with the insertion grooves.

6. The fixture of claim 5, wherein, The insertion end of the insertion strip (416) is made of hard material, the other end is made of flexible material, and the thickness of the insertion strip (416) is greater than the depth of the insertion groove.

7. The fixture of claim 1, wherein The outer wall of the upper fixed plate (42) is annularly and fixedly provided with a plurality of limiting blocks (422), one end of the smoothing plate (423) is rotatably installed in the limiting block (422), and the other end of the smoothing plate (423) is rotatably arranged with a plurality of rolling balls (424) in the side of the fixed seat (3).

8. The fixture of claim 1, wherein, A through hole (21) is formed in the upper mounting plate (2), the clamp (4) and the upper end of the fixed seat (3), and the through hole (21) is used for the needle to pass through and perform the puncture strength test on the film.

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