A device for measuring the tensile strength of a foam

Abstract

The utility model relates to a kind of foam tensile strength detection devices, including processing station, the clamping mechanism is equipped in the processing station upper, test mechanism is equipped in the clamping mechanism, buffer assembly is equipped on the clamping mechanism;Clamping mechanism includes support arm and movable arm, support arm and movable arm are connected with support plate and clamping plate, buffer assembly is equipped on the clamping plate;Buffer assembly includes arc extension plate, arc extension plate can overturn on the clamping plate.Test mechanism includes positioning column, the fixed plate lower end is connected with the positioning column upper end and is equipped with connecting block, tension sensor is equipped on the connecting block, and test rod is connected on the connecting block.The utility model can be clamped to different size foam sample by clamping mechanism;Foam and the connecting place of clamping mechanism can be buffered by buffer assembly, prevent foam from being broken at the fixed place of clamping mechanism in the process of stretching, so as to make test result appear error, and simultaneously, test personnel operation and artificial error can be reduced by controlling device to control test mechanism.

Description

Technical Field

[0001] This utility model belongs to the field of foam testing technology, and specifically relates to a foam tensile strength testing device. Background Technology

[0002] Foam is a material made by foaming plastic particles. Foam is categorized into various types, including PU foam, antistatic foam, conductive foam, EPE, antistatic EPE, CR, EVA, cross-linked PE, SBR, and EPDM. Foam possesses a range of characteristics such as elasticity, lightweight, rapid pressure-sensitive fixing, ease of use, flexibility, ultra-thinness, and reliable performance. It is primarily used in shock absorption and protection applications, such as in the automotive, electronics, and home appliance industries.

[0003] In existing technologies, when testing the tensile strength of foam, it is usually fixed by a fixing mechanism before stretching. However, during the stretching process, the foam is more prone to breakage at the clamping mechanism because the edge of the clamping mechanism comes into contact with the foam, which leads to errors in the test results. Testers need to repeat the test, which reduces the testing efficiency. Therefore, a foam tensile strength testing device was designed. Utility Model Content

[0004] This invention provides a foam tensile strength testing device, which aims to solve the problems mentioned in the background art.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is: a foam tensile strength testing device, including a processing table, a clamping mechanism and a testing mechanism are provided above the processing table, and a buffer component is provided on the clamping mechanism;

[0006] The clamping mechanism includes a support arm and a movable arm. The support arm is fixedly connected to the processing table, and the movable arm is located in the slide groove. The slide groove is located on the processing table. Both the movable arm and the support arm are located along the length of the slide groove. Support plates are connected to both the support arm and the movable arm. Clamping plates are provided above the support plates. Buffer components are provided on the clamping plates.

[0007] The buffer assembly includes an arc-shaped extension plate. The edges of the two clamping plates that are close to each other are provided with slots. A fixing rod is provided in the slot. The arc-shaped extension plate is provided with a through hole. The fixing rod passes through the through hole and is fixedly connected to the clamping plate. The arc-shaped extension plate flips around the fixing rod.

[0008] Furthermore, both the support arm and the movable arm are provided with vertically extending connecting grooves, with threaded rods inside the connecting grooves. Fixing blocks are fitted onto the threaded rods, and the fixing blocks are fixedly connected to the clamping plates.

[0009] Furthermore, a slider is provided inside the chute, and the upper surface of the slider is fixedly connected to the lower end of the movable arm. An electric push rod is also provided inside the chute, which is connected to the slider and can make the slider move along the length of the chute.

[0010] Furthermore, the testing mechanism includes a positioning column, which is fixedly connected to the upper surface of the processing table. A fixing plate is connected to the upper end of the positioning column, and a slide rail is connected to the lower end of the fixing plate.

[0011] Furthermore, a movable block is provided inside the slide rail, and a telescopic rod is connected to the lower end of the movable block. A connecting block is connected to the lower end of the telescopic rod.

[0012] Furthermore, a tension sensor is provided on the connecting block, and a test rod is connected to the connecting block, with the test rod located in the middle of the clamping mechanism.

[0013] Furthermore, a spring is provided on the arc-shaped extension plate, which is located in a slot on the clamping plate and is fixedly connected to the upper surface of the arc-shaped extension plate.

[0014] Compared with the prior art, the advantages of this utility model are: the structure of this utility model is simple and convenient to use. The clamping mechanism can clamp foam samples of different sizes, and the rubber pad increases friction to prevent the foam from detaching from the clamping mechanism. The buffer component can buffer the connection between the foam and the clamping mechanism to prevent the foam from breaking at the fixed point of the clamping mechanism during the stretching process, thus causing errors in the test results. At the same time, the control device can control the testing mechanism to reduce the operation and human error of the test personnel. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the movable arm structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the structure at point A of this utility model;

[0018] Figure 4 This is a schematic diagram of the testing mechanism structure of this utility model;

[0019] In the diagram, 1-processing table, 2-support arm, 3-movable arm, 4-slider, 5-reinforcing rib, 6-support plate, 7-clamping plate, 8-fixed block, 9-threaded rod, 10-rubber pad, 11-positioning column, 12-fixed plate, 13-slide rail, 14-moving block, 15-telescopic rod, 16-connecting block, 17-test rod, 18-tension sensor, 19-arc extension plate, 20-fixed rod, 21-spring, 22-control device. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. It should be understood that the preferred embodiments described herein are only for illustration and explanation of the present invention and are not intended to limit the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can be arranged and designed in various different configurations. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention. In the embodiments, the components of the embodiments of the present application described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the present application.

[0021] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," "front," and "rear," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to an electrical connection; they can refer to a hydraulic connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0023] refer to Figures 1 to 4 A foam tensile strength testing device includes a processing table 1, on which a clamping mechanism is provided to fix the foam sample to be tested. The processing table 1 is also provided with a testing mechanism and a control device 22. The testing mechanism can test the tensile properties of the foam, and the control device 22 can control the testing mechanism and record the test results, which is convenient for testers to collect data.

[0024] A base is provided below the processing table 1, and a clamping mechanism is provided on the upper surface of the processing table 1. The clamping mechanism includes a support arm 2, and a movable arm 3 is provided next to the support arm 2. The support arm 2 and the movable arm 3 are the same in shape and size and are arranged opposite to each other. A slide groove is provided on the upper surface of the processing table 1. A slider 4 is connected to the lower end of the movable arm 3. A reinforcing rib 5 is provided on the movable arm 3. The side of the reinforcing rib 5 is fixedly connected to the movable arm 3, and the lower end of the reinforcing rib 5 is fixedly connected to the upper surface of the slider 4. The slider 4 is located in the slide groove and can move along the length of the slide groove. Protrusions are provided on the two side walls of the slider 4. The inner wall of the slide groove The corresponding position is provided with a recess, so that the slider 4 can only move within the groove, preventing it from being dislodged from the groove under force during the stretching process. The support arm 2 is located in the length direction of the groove. An electric push rod is provided in the groove. The movable end of the electric push rod is connected to the side of the slider 4, and the other end of the electric push rod is fixedly connected to the inner wall of the groove. The extension and retraction direction of the electric push rod is the same as the length direction of the groove. The movable arm 3 can be moved along the length direction of the groove by the electric push rod. The distance between the support arm 2 and the movable arm 3 can be adjusted by the electric push rod, so as to clamp foam samples of different lengths.

[0025] A support plate 6 is provided between the support arm 2 and the movable arm 3. There are two support plates 6, which are located on the side surfaces of the support arm 2 and the movable arm 3 that are close to each other, and are fixedly connected to each of them. The two support plates 6 are at the same horizontal height. A clamping plate 7 is provided above each support plate 6. A fixing block 8 is connected to one end of the two clamping plates 7 near the support arm 2 and the movable arm 3, respectively. A vertically extending connecting groove is provided on both the support arm 2 and the movable arm 3. The fixing block 8 is located in the connecting groove. A through hole is provided at the upper end of the support arm 2 and the movable arm 3. The through hole is connected to the connecting groove.

[0026] The fixed block 8 is provided with a vertically extending threaded hole, and the connecting groove is provided with a threaded rod 9. The threaded rod 9 passes through or is threadedly connected to the upper end face of the movable arm 3, and the threaded rod 9 is rotatably connected to the bottom of the connecting groove. Rotating the threaded rod 9 can move the fixed block 8 along the length of the connecting groove, so that the support plate 6 and the clamping plate 7 come into contact and thus clamp the foam sample to be tested.

[0027] A rubber pad 10 is provided on the side of the support plate 6 and the pressure plate that are close to each other. The rubber pad 10 can increase the friction between the foam sample to be tested and the clamping mechanism, and prevent the foam from falling off the clamping mechanism during the tensile test.

[0028] The testing mechanism includes a positioning column 11, which is fixedly connected to the upper surface of the processing table 1. A fixing plate 12 is provided at the upper end of the positioning column 11, and the lower surface of the fixing plate 12 is fixedly connected to the upper end of the positioning column 11. A slide rail 13 is provided below the fixing plate 12, and a moving block 14 is provided inside the slide rail 13. The moving block 14 can move along the length direction of the slide rail 13, and the length direction of the slide rail 13 is parallel to that of the slide groove.

[0029] A telescopic rod 15 is fixedly connected to the lower end of the movable block 14. The lower end of the telescopic rod 15 is a movable end, and a connecting block 16 is connected to the movable end of the telescopic rod 15. A test rod 17 is connected to the connecting block 16. The test rod 17 faces the clamping mechanism and is placed horizontally and perpendicular to the length direction of the slide rail 13. The test rod 17 is located in the middle of the clamping mechanism. A tension sensor 18 is provided on the connecting block 16 and is connected to the test rod 17. During the test, the test rod 17 is located below the foam sample to be tested. At the same time, the test rod 17 moves upward to stretch the foam. When the test rod 17 is subjected to tension, the corresponding value can be measured by the tension sensor 18.

[0030] To prevent the foam at the clamping mechanism from breaking more easily due to contact between the edge of the clamping mechanism and the foam during the test, thus causing errors in the test results, a buffer assembly is also provided on the clamping mechanism. The buffer assembly includes two arc-shaped extension plates 19, which are located on the adjacent sides of the two clamping plates 7. The clamping plates 7 have slots at their edges, with the upper end of the slot being shorter than the lower end. A fixing rod 20 is provided in the slot and is fixedly connected to the clamping plate 7. The arc-shaped extension plates 19 have through holes through which the fixing rod 20 passes, allowing the arc-shaped extension plates 19 to be flipped around the fixing rod 20. Springs 21 are provided near the edge of the arc-shaped extension plates 19 close to the clamping plate 7. Each arc-shaped extension plate 19 has two springs 21, which are located on the upper surface of the arc-shaped extension plate 19. The two ends of the springs 21 are fixedly connected to the inner wall of the slot on the arc-shaped extension plate 19 and the clamping plate 7, respectively. When the foam sample to be tested is stretched upward by the test rod 17, the arc-shaped extension plates 19 will be lifted upward.

[0031] The control device 22 is located on the upper surface of the processing table 1. The control device 22 can control the telescopic rod 15 and the testing mechanism to fix the foam sample to be tested on the clamping mechanism. The clamping mechanism can fix foam samples of different sizes. At this time, the testing rod 17 is located below the foam sample to be tested. The testing rod 17 is moved upward to stretch the foam sample to be tested. The tensile force data can be observed through the tensile force sensor 18 connected to the testing rod 17. The control device 22 is connected to the tensile force sensor 18 and can record the tensile force value. When the foam sample to be tested breaks, the testing device can record the final tensile force value. After the foam breaks, the sample can be replaced or the spacing of the clamping mechanism can be adjusted to test the same foam sample.

[0032] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this invention. Therefore, the protection scope of this utility model should be primarily defined by the scope of the claims.

Claims

1. A foam tensile strength testing device, comprising a processing table, characterized in that: The processing table is equipped with a clamping mechanism and a testing mechanism, and the clamping mechanism is equipped with a buffer component. The clamping mechanism includes a support arm and a movable arm. The support arm is fixedly connected to the processing table, and the movable arm is located in the slide groove. The slide groove is located on the processing table. Both the movable arm and the support arm are located along the length of the slide groove. Support plates are connected to both the support arm and the movable arm. Clamping plates are provided above the support plates. Buffer components are located on the clamping plates. The buffer assembly includes an arc-shaped extension plate, with slots at the edges of the two clamping plates that are close to each other. A fixing rod is provided in the slots, and a through hole is provided on the arc-shaped extension plate. The fixing rod passes through the through hole and is fixedly connected to the clamping plate. The arc-shaped extension plate flips around the fixing rod.

2. The foam tensile strength testing device according to claim 1, characterized in that: Both the support arm and the movable arm are provided with vertically extending connecting grooves, and threaded rods are provided in the connecting grooves. Fixing blocks are fitted on the threaded rods and are fixedly connected to the clamping plates.

3. The foam tensile strength testing device according to claim 1, characterized in that: The slide groove is equipped with a slider, the upper surface of which is fixedly connected to the lower end of the movable arm. The slide groove is also equipped with an electric push rod, which is connected to the slider and can move the slider along the length of the slide groove.

4. The foam tensile strength testing device according to claim 1, characterized in that: The testing mechanism includes a positioning column, which is fixedly connected to the upper surface of the processing table. A fixing plate is connected to the upper end of the positioning column, and a slide rail is connected to the lower end of the fixing plate.

5. The foam tensile strength testing device according to claim 4, characterized in that: The slide rail is equipped with a movable block, and the lower end of the movable block is connected to a telescopic rod, and the lower end of the telescopic rod is connected to a connecting block.

6. The foam tensile strength testing device according to claim 5, characterized in that: The connecting block is equipped with a tension sensor, and a test rod is connected to the connecting block. The test rod is located in the middle of the clamping mechanism.

7. The foam tensile strength testing device according to claim 1, characterized in that: A spring is provided on the arc-shaped extension plate. The spring is located in a slot on the clamping plate and is fixedly connected to the upper surface of the arc-shaped extension plate.

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