Compression device for testing compression permanent deformation rate of composite sponge

Abstract

The utility model relates to a compression device for testing the compression permanent deformation rate of a composite sponge and a use method and application thereof, and mainly solves the problems of large error of the whole test result and complicated operation when the compression permanent deformation rate of the composite sponge is tested in the prior art. According to the technical scheme, the novel compression device for testing the compression permanent deformation rate of the composite sponge comprises a bottom plate (1), at least one compression plate (2), a first stud (3), a second stud (4), a first nut (5), a second nut (6), a first gasket (7) and a second gasket (8), the problem is well solved, and the compression device can be applied to industrial application of the composite sponge.

Description

Technical Field

[0001] This utility model relates to the field of composite sponge compression permanent deformation rate detection technology, specifically a compression device for testing the compression permanent deformation rate of composite sponge. Background Technology

[0002] The composite sponge has a three-layer structure: from top to bottom, it includes a first fabric layer, a synthetic polyether ester sponge, and a second fabric layer. It is also very thin. When using a sponge compression permanent deformation rate test fixture, glass slides need to be stacked to ensure that the thickness of the stacked composite sponge is at least 25mm for testing. However, the thickness of each individual composite sponge is different, which leads to a large stacking error and ultimately a large error in the overall test results. In addition, glass slides are required for pretreatment before testing, and if 5 samples are tested, the amount of samples required is also very large, making the whole process quite cumbersome.

[0003] Currently, a standard for measuring the compression set of composite sponges has been established (GB / T 6669-2008), which specifies the standard measurement method. However, in actual measurement, composite sponges lack a dedicated compression device, making it inconvenient to perform the corresponding measurement operations and making it impossible to ensure the accuracy of the corresponding measurement operations.

[0004] Chinese Patent CN107589023B discloses a compression device and its method for determining the compression set of rubber. This device, relating to the field of rubber compression set detection technology, includes a first compression plate, a second compression plate, a limiter, and an adjustable buckle fastening device. The first compression plate is positioned on one side of the second compression plate, parallel to it. The limiter is located between the first and second compression plates, with one side of the limiter contacting the first compression plate and the opposite side contacting the second compression plate. The adjustable buckle fastening device includes a buckle and an adjustable fastener. The buckle is located on the side of the second compression plate and connected to it. The adjustable fastener is extendable in the length direction, located on the side of the first compression plate, with one end connected to the first compression plate. In use, the other end of the adjustable fastener is engaged with the buckle. This improves testing efficiency, extends the service life of the compression device for determining the compression set of rubber, and saves testing costs. Their tooling testing products are of a single size, and the requirements for the consistency of test samples are relatively strict. They cannot accurately and quickly meet our testing requirements for multiple product specifications, and loose hooks or limiters are not easy to identify, which will affect our testing accuracy.

[0005] Chinese patent CN218271714U discloses a device for measuring the compression set of flexible foam polymers. The device includes a base plate, a top plate, compression bolts, compression nuts, and positioning bolts. The base plate and top plate are arranged parallel to each other. One end of the compression bolt is connected to the base plate, and the other end penetrates the top plate. A compression nut is located at the end of the compression bolt penetrating the top plate. Multiple compression bolts are arranged parallel to each other and are arranged in a ring near the edge of the base plate. The positioning bolt penetrates the base plate and is threaded to it, with the end of the positioning bolt facing away from the head abutting against the top plate. The achieved technical effect is that it allows for flexible adjustment and control of the distance between the top and bottom plates, enabling compression testing of flexible foam polymers placed between the top and bottom plates according to measurement standards. The entire device has a simple structure, is easy to use and operate, and ensures the accuracy of the corresponding measurement operations. However, this patent only tightens at the edges, which can lead to insufficient pressure in the middle, resulting in inaccurate testing. Summary of the Invention

[0006] The technical problem to be solved by this utility model is that the existing technology has a large overall test result error when testing the compression permanent deformation rate of composite sponges, and the operation process is cumbersome. This utility model provides a new compression device for testing the compression permanent deformation rate of composite sponges, which has the advantages of accurate testing, small test result error and simple operation.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a compression device for testing the permanent compression deformation rate of composite sponge, characterized in that it includes: a base plate 1, at least one compression plate 2, a first stud 3, a second stud 4, a first nut 5, a second nut 6, a first washer 7, and a second washer 8, wherein the base plate 1 and the compression plate 2 are arranged parallel to each other; one end of the first stud 3 and the second stud 4 is fixedly connected to the base plate 1, the other end of the first stud 3 passes through the first washer 7 and the compression plate 2, and the end of the first stud 3 passing through the compression plate 2 is provided with a first nut 5; The other end of the second stud 4 passes through the second washer 8 and the compression plate 2, and the end of the second stud 4 passing through the compression plate 2 is provided with a second nut 6; wherein, the number of the first stud 3, the first nut 5, and the first washer 7 is at least 4, and the number of the second stud 4, the second nut 6, and the second washer 8 is at least 1. The first stud 3, the second stud 4, the first nut 5, the second nut 6, the first washer 7, and the second washer 8 are arranged parallel to each other, and the first stud 3 is arranged sequentially near the edge of the base plate 1; the second stud 4 are evenly distributed with the axis of the base plate 1 as the center.

[0008] In the above technical solution, preferably, the number of the first stud 3 and the first nut 5 is 4, and the number of the second stud 4 and the second nut 6 is 2.

[0009] In the above technical solution, preferably, the base plate 1 and the compression plate 2 are rectangular; the first studs 3 are respectively disposed at the four corners of the base plate 1, the size of the first studs 3 is M6, and the size of the second studs 4 is M4; the size of the base plate 1 and the compression plate 2 is 150mm*200mm*4~6mm; the thickness of the first gasket 7 and the second gasket 8 is 0.1±0.01mm.

[0010] In the above technical solution, preferably, the second stud 4 is located 35-40mm away from the edge on both sides of the center of the base plate 1.

[0011] In the above technical solution, preferably, the compression plate 2 is provided with a first through hole 9 and a second through hole 10. The number of the first through holes 9 is 4, and the number of the second through holes 10 is 2. The first through holes 9 correspond one-to-one with the first studs 3, and the second through holes 10 correspond one-to-one with the second studs 4.

[0012] This invention provides a compression device for testing the compression permanent deformation rate of composite sponges. To improve the accuracy and reliability of the test, a second stud has been added to the original device. This key improvement effectively ensures a high degree of consistency in the compression amount during the test, greatly reducing test errors caused by compression deviations. Previously, the test required the test samples to be stacked to a thickness of at least 25mm, and the shim thickness was selected based on the 25mm sample thickness. This resulted in poor compression consistency and required the use of appropriate shims. Now, the number of 0.1mm shims can be flexibly selected based on the specific thickness of the product, reducing test errors caused by the sample thickness and reducing the use of glass plates. This method more accurately reflects the performance of the product in actual use and is simpler to implement. Attached Figure Description

[0013] Appendix Figure 1 This is a schematic diagram of a compression device used to test the compression permanent deformation rate of composite sponge;

[0014] Appendix Figure 2 This is a schematic diagram of the first and second gaskets of a compression device used to test the compression permanent deformation rate of composite sponge;

[0015] Appendix Figure 3 This is a schematic diagram of the first and second through holes of a compression device used to test the compression permanent deformation rate of composite sponge;

[0016] Among them, 1 is the base plate, 2 is the compression plate, 3 is the first stud, 4 is the second stud, 5 is the first nut, 6 is the second nut, 7 is the first washer, 8 is the second washer, 9 is the first through hole, and 10 is the second through hole. Detailed Implementation

[0017] The present invention will be further described in detail below with reference to specific embodiments. The description is for explanation and not limitation of the present invention.

[0018]

Example

[0019] A compression device for testing the compression permanent deformation rate of composite sponge, characterized in that it comprises: a base plate 1, two compression plates 2, a first stud 3, a second stud 4, a first nut 5, a second nut 6, a first washer 7, and a second washer 8; the base plate 1 and the compression plates 2 are arranged parallel to each other; one end of the first stud 3 and the second stud 4 is fixedly connected to the base plate 1, the other end of the first stud 3 passes through the first washer 7 and the compression plate 2, and the end of the first stud 3 passing through the compression plate 2 is provided with a first nut 5; the second stud 4... The other end passes through the second gasket 8 and the compression plate 2, and the second stud 4 passes through the end of the compression plate 2 and is provided with a second nut 6; wherein, the number of the first studs 3 and the first nuts 5 is 4, and the number of the second studs 4 and the second nuts 6 is 2. The first studs 3, the second studs 4, the first nuts 5 and the second nuts 6, the first gasket 7 and the second gasket 8 are arranged parallel to each other, and the first studs 3 are arranged sequentially near the edge of the base plate 1; the second studs 4 are evenly distributed with the axis of the base plate 1 as the center;

[0020] The base plate 1 and compression plate 2 are rectangular; the first studs 3 are respectively set at the four corners of the base plate 1, the size of the first studs 3 is M6, and the size of the second studs 4 is M4; the size of the base plate 1 and compression plate 2 is 150mm*200mm*5mm; the thickness of the first gasket 7 and the second gasket 8 is 0.1mm.

[0021] The second stud 4 is located 35mm from the edge on both sides of the center of the base plate 1.

[0022] The compression plate 2 is provided with a first through hole 9 and a second through hole 10. There are 4 first through holes 9 and 2 second through holes 10. The first through holes 9 correspond to the first studs 3 one-to-one, and the second through holes 10 correspond to the second studs 4 one-to-one.

[0023] Step 1: During installation, use a measuring tool to accurately measure the sample thickness. The test sample thickness should be 3.18-3.20mm. Spread the test samples evenly on the base plate 1, ensuring that the gaps between the test samples are uniform. Based on the test sample thickness, select the following for each stud washer: = (sample thickness mm * (1-50%)) / 0.1mm. If the number is not an integer, round it off. Here, select 16 first washers 7 and 8 for each first stud 3 and second stud 4, and fit them onto the first stud 3 and second stud 4 one by one. A total of 64 first washers and 32 second washers are selected.

[0024] Step 2: Slowly place the first compression plate 2 onto the first stud 3 and the second stud 4, ensuring that it is parallel to the base plate 1. Use a measuring tool to accurately measure the sample thickness. The test sample thickness is 3.17 to 3.20 mm. Spread the sample evenly on the first compression plate 2 to ensure that the gap between the test samples is uniform. According to the test sample thickness, the number of gaskets selected for each stud is (sample thickness mm * (1-75%)) / 0.1 mm. If the number is not an integer, round it off. Here, 8 first gaskets 7 and 8 second gaskets are selected for each first stud 3 and second stud 4 and are placed on the first stud 3 and second stud 4 one by one. A total of 32 first gaskets and 16 second gaskets are selected.

[0025] Finally, slowly place the second compression plate 2 onto the first stud 3 and the second stud 4, ensuring that it is parallel to the base plate 1 and the first compression plate 2. First, press the second nut 6 and then the first nut 5.

[0026] [Comparative Example]

[0027] The comparative test fixture only has the first stud. The test sample is a block of about 8 composite parts stacked together with a total thickness of at least 25mm.

[0028] Eight composite materials with a thickness of 3.15–3.29 mm were stacked together to form a test sample block with a total thickness of at least 25 mm. The sample block was placed on the base plate. A 1 mm glass plate was used as a spacer between each composite material. There were a total of 7 spacers. 50% of the spacers were selected and placed on the four studs.

[0029] Continue by placing the first compression plate on the stud. Select 8 pieces of the above composite material with a thickness of 3.15-3.29 mm, stacked together with a total thickness of at least 25 mm, as a test sample block for testing. Use a 1 mm glass plate as a spacer in the middle of each batch. There are a total of 7 layers of spacers. Select the corresponding spacer block to place on the stud in 75% of the batch.

[0030] Finally, place the second compression plate on the stud and tighten the nut.

[0031] After adjusting the temperature and compressing time according to the requirements of GB / T 6669-2008, and meeting the requirements for compression permanent deformation test in GB / T 6669-2008, loosen the nut and remove the composite sponge. After adjusting the condition according to the requirements of GB / T 6669-2008, measure the final thickness of the sample and calculate the compression permanent deformation of the composite sponge according to GB / T 6669-2008.

[0032] The specific implementation results are shown in Table 1.

[0033] Table 1 Results of Compression Permanent Deformation Test

[0034]

[0035] Based on the results above, the results obtained by using a compression device to test the compression permanent deformation rate of composite sponge are better than those obtained by using the comparative test results, and the accuracy rate is significantly improved.

Claims

1. A compression device for testing the compression permanent deformation rate of a composite sponge, characterized in that, include: The base plate (1), at least one compression plate (2), a first stud (3), a second stud (4), a first nut (5), a second nut (6), a first washer (7), and a second washer (8) are arranged parallel to each other. One end of the first stud (3) and the second stud (4) are fixedly connected to the base plate (1), and the other end of the first stud (3) passes through the first washer (7) and the compression plate (2). The end of the first stud (3) that passes through the compression plate (2) is provided with a first nut (5). The other end of the second stud (4) passes through the second washer (8) and the compression plate (2). The second stud (4) passes through the end of the compression plate (2) and is provided with a second nut (6); wherein, the number of the first stud (3), the first nut (5), and the first washer (7) is at least 4, and the number of the second stud (4), the second nut (6), and the second washer (8) is at least 1. The first stud (3), the second stud (4), the first nut (5), the second nut (6), the first washer (7), and the second washer (8) are arranged parallel to each other, and the first stud (3) is arranged in sequence near the edge of the base plate (1); the second stud (4) is evenly distributed with the axis of the base plate (1) as the center.

2. The compression device for testing the compression permanent deformation rate of composite sponge according to claim 1, characterized in that, The number of the first stud (3) and the first nut (5) is 4, and the number of the second stud (4) and the second nut (6) is 2.

3. The compression device for testing the compression permanent deformation rate of composite sponge according to claim 1, characterized in that, The base plate (1) and compression plate (2) are rectangular; the first studs (3) are respectively set at the four corners of the base plate (1), the size of the first studs (3) is M6, and the size of the second studs (4) is M4; the size of the base plate (1) and compression plate (2) is 150mm*200mm*4~6mm; the thickness of the first gasket (7) and the second gasket (8) is 0.1±0.01mm.

4. The compression device for testing the compression permanent deformation rate of composite sponge according to claim 1, characterized in that, The second stud (4) is located 35-40 mm away from the edge on both sides of the center of the base plate (1).

5. The compression device for testing the compression permanent deformation rate of composite sponge according to claim 1, characterized in that, The compression plate (2) is provided with a first through hole (9) and a second through hole (10). There are 4 first through holes (9) and 2 second through holes (10). The first through holes (9) correspond to the first studs (3) one by one; the second through holes (10) correspond to the second studs (4) one by one.

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