Compression device for testing compression permanent deformation rate of composite sponge as well as use method and application of compression device

Abstract

The invention relates to a compression device for testing the compression set 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 tedious operation when the compression set 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] The invention relates to the technical field of composite sponge compression permanent deformation rate detection, in particular to a compression device for testing composite sponge compression permanent deformation rate and a use method and application thereof. Background Art

[0002] The composite sponge consists of a three-layer structure: from top to bottom, it includes the first fabric layer, the synthetic polyether ester sponge, and the second fabric layer. It is thin. When using the sponge compression permanent deformation test tooling, it is necessary to use glass sheets to stack the composite sponge to make the thickness of the stacked composite sponge at least 25mm for testing. However, the thickness of each single piece of the composite sponge is different, resulting in a large stacking error, which ultimately leads to a large error in the overall test result. In addition, glass sheets are required for pre-test treatment. If 5 samples are tested, the required sample volume is also large, and the entire process is relatively cumbersome.

[0003] At present, a measurement standard (GB / T 6669-2008) has been formulated for the measurement of permanent compression deformation of products, and a standard measurement method has been specified. However, in the actual measurement process, the composite sponge lacks a dedicated compression device, which makes it inconvenient to perform the corresponding measurement operation and cannot ensure the accuracy of the corresponding measurement operation.

[0004] Chinese patent CN107589023B discloses a compression device for measuring the permanent deformation rate of rubber compression and a method of using the same: Provide a compression device for measuring the permanent deformation rate of rubber compression and a method of using the same, which relates to the technical field of rubber permanent deformation rate detection, including a first compression plate, a second compression plate, a stopper and an adjustable buckle fastening device; the first compression plate is arranged on one side of the second compression plate, parallel to the second compression plate, the stopper is located between the first compression plate and the second compression plate, one side of the stopper contacts the first compression plate, and the other side opposite to the side contacts 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 the second compression plate; the adjustable fastener can be extended and retracted in the length direction, is located on the side of the first compression, one end is connected to the first compression plate, and when in use, the other end of the adjustable fastener is stuck on the buckle. Improve the test efficiency, extend the service life of a compression device for measuring the permanent deformation rate of rubber compression, and save the test cost. The tooling test products have a single size and strict requirements on the consistency of the test samples. They cannot accurately and quickly meet our multi-specification product testing requirements, and loose hooks or limiters are difficult to identify, which will affect our test accuracy.

[0005] Chinese patent CN218271714U discloses a device for measuring the compression permanent deformation of soft foam polymer products: a device for measuring the compression permanent deformation of soft foam polymer products is disclosed, including a bottom plate, a top plate, a compression bolt, a compression nut and a positioning bolt, the bottom plate and the top plate are arranged parallel to each other; one end of the compression bolt is connected to the bottom plate, the other end of the compression bolt passes through the top plate, and a compression nut is provided at the end of the compression bolt passing through the top plate, the number of compression bolts is multiple, the multiple compression bolts are arranged parallel to each other, and the multiple compression bolts are arranged in a circular manner near the edge of the bottom plate; the positioning bolt passes through the bottom plate and is threadedly connected to the bottom plate, and the end of the positioning bolt away from the head abuts against the top plate. The technical effect achieved is: the distance between the top plate and the bottom plate can be flexibly adjusted and controlled, so as to perform compression test on the soft foam polymer products placed between the top plate and the bottom plate according to the measurement standard, the whole device has a simple structure, is easy to use and operate, and can ensure the accuracy of the corresponding measurement operation. This patent is only tightened at the edge, which is prone to insufficient intermediate pressure. Insufficient pressure in the middle will lead to insufficient test accuracy. Summary of the invention

[0006] One of the technical problems to be solved by the present invention is that in the prior art, when testing the compression permanent deformation rate of a composite sponge, there is a problem of large error in the overall test result, and the operation process is cumbersome. A new compression device for testing the compression permanent deformation rate of a composite sponge is provided, which has the advantages of accurate testing, small error in test results and simple operation.

[0007] The second technical problem to be solved by the present invention is to provide a method for using a compression device for testing the permanent deformation rate of composite sponge compression corresponding to the first technical problem to be solved.

[0008] The third technical problem to be solved by the present invention is to provide an application of a compression device for testing the permanent deformation rate of composite sponge compression corresponding to the first technical problem to be solved.

[0009] In order to solve one of the above technical problems, the technical solution adopted by the present invention is as follows: a compression device for testing the compression permanent deformation rate of a composite sponge, characterized in that it 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, wherein the bottom 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 bottom plate 1, and the other end of the first stud 3 passes through the first gasket 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 gasket 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 gasket 7 is at least 4, the number of the second stud 4, the second nut 6, and the second gasket 8 is at least 1, the first stud 3, the second stud 4, the first nut 5, the second nut 6, the first gasket 7, and the second gasket 8 are arranged parallel to each other, and the first stud 3 is arranged in sequence at a position close to 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.

[0010] In the above technical solution, preferably, 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.

[0011] In the above technical solution, preferably, the base plate 1 and the compression plate 2 are rectangular; the first studs 3 are respectively arranged 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 sizes of the base plate 1 and the compression plate 2 are both 150mm*200mm*4~6mm; the thickness of the first gasket 7 and the second gasket 8 is 0.1±0.01mm.

[0012] In the above technical solution, preferably, the second studs 4 are located on both sides of the center of the bottom plate 1 and are shifted 35 to 40 mm toward the edge.

[0013] 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, the number of the second through holes 10 is 2, 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.

[0014] In order to solve the second technical problem mentioned above, the technical solution adopted by the present invention is as follows: a method for using a compression device for testing the compression permanent deformation rate of a composite sponge comprises the following steps:

[0015] Step 1: During installation, use a measuring tool to accurately measure the product thickness d, and evenly spread the test samples on the bottom plate 1 to ensure that the gaps between the test samples are uniform. According to the thickness of the test samples, the selection of each stud gasket = (product thickness mm*(1-compression%)) / 0.1mm. If the number is not an integer, round it off to select the corresponding number of first gaskets 7 and second gaskets 8, and then put the corresponding number of first gaskets 7 and second gaskets 8 on each first stud 3 and second stud 4 one by one;

[0016] Step 2: Finally, slowly put the compression plate 2 on the first stud 3 and the second stud 4, making sure that it is parallel to the bottom plate 1, and press the second nut 6 first and then the first nut 5.

[0017] In the above technical solution, preferably, the first nut 5 and the second nut 6 are tightened with a suitable torque wrench according to the specified torque value, first tightening the second nut 6 to ensure that the torque is evenly applied to avoid uneven force on the stud; the remaining studs are tightened in turn by diagonal tightening, and the torque value of each tightening must be kept consistent to ensure that the pressure between the test plate and the product is evenly distributed.

[0018] In order to solve the third technical problem mentioned above, the technical solution adopted by the present invention is as follows: an application of a compression device for testing the compression permanent deformation rate of a composite sponge in a composite sponge.

[0019] In the above technical solution, preferably, the height of the composite sponge is in the range of 2 to 10 mm.

[0020] The present invention provides a compression device for testing the permanent deformation rate of composite sponge compression. In order to improve the accuracy and reliability of the test, we added a second stud on the basis of the original device. This key improvement effectively ensures the high consistency of the compression amount during the test, and greatly reduces the test error caused by the deviation of the compression amount. The previous test required the test samples to be stacked to a thickness of at least 25mm, and the gasket thickness was selected according to the sample thickness of 25mm. The compression consistency was relatively poor and the corresponding pads needed to be configured. Now, according to the specific thickness of the product, the number of gaskets with a specification of 0.1mm can be flexibly selected for testing, which reduces the test error caused by the thickness of the test sample and reduces the use of glass sheets. In this way, the performance of the product in actual use can be more accurately reflected and the process is simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Attached Figure 1 It is a schematic diagram of a compression device for testing the compression permanent deformation rate of a composite sponge;

[0022] Attached Figure 2 It is a schematic diagram of a first gasket and a second gasket of a compression device for testing the compression permanent deformation rate of a composite sponge;

[0023] Attached Figure 3 It is a schematic diagram of a first through hole and a second through hole of a compression device for testing the compression permanent deformation rate of a composite sponge;

[0024] 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 gasket, 8 is the second gasket, 9 is the first through hole, and 10 is the second through hole. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below in conjunction with specific embodiments, which are intended to explain the present invention rather than to limit it.

[0026] [Example]

[0027] A compression device for testing the compression permanent deformation rate of a composite sponge, characterized in that it comprises: a bottom plate 1, two compression plates 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, wherein the bottom 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 bottom plate 1, and the other end of the first stud 3 passes through the first gasket 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 compression plate 2 and is provided with a second nut 6 at the end thereof; wherein, the number of the first stud 3 and the first nut 5 is 4, the number of the second stud 4 and the second nut 6 is 2, the first stud 3, the second stud 4, the first nut 5, the second nut 6, the first gasket 7, and the second gasket 8 are arranged parallel to each other, and the first stud 3 is arranged in sequence at a position close to the edge of the bottom plate 1; the second stud 4 is evenly distributed with the axis of the bottom plate 1 as the center;

[0028] The base plate 1 and the compression plate 2 are rectangular; the first studs 3 are respectively arranged 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 sizes of the base plate 1 and the compression plate 2 are both 150mm*200mm*5mm; the thickness of the first gasket 7 and the second gasket 8 is 0.1mm.

[0029] The second studs 4 are located at both sides of the center of the bottom plate 1 and are shifted 35 mm toward the edge.

[0030] 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 to the first studs 3 one by one; the second through holes 10 correspond to the second studs 4 one by one.

[0031] The following steps are involved:

[0032] Step 1: During installation, use a measuring tool to accurately measure the sample thickness. The test sample thickness is 3.18-3.20 mm and is evenly spread on the bottom plate 1 to ensure that the gaps between the test samples are uniform. According to the test sample thickness, the selection of each stud gasket = (sample thickness mm*(1-50%)) / 0.1 mm. If the number is not an integer, it is rounded off and selected. Here, each first stud 3 and second stud 4 selects 16 first gaskets 7 and second gaskets 8, which are put on the first stud 3 and the second stud 4 one by one, and a total of 64 first gaskets and 32 second gaskets are selected;

[0033] Step 2: Slowly put the first compression plate 2 on the first stud 3 and the second stud 4, ensuring that it is parallel to the bottom plate 1, and accurately measure the sample thickness with a measuring tool. The test sample thickness is 3.17-3.20 mm and evenly spread on the first compression plate 2 to ensure that the gaps between the test samples are uniform. According to the test sample thickness, the number of gaskets for each stud is selected = (sample thickness mm*(1-75%)) / 0.1 mm. If the number is not an integer, it is rounded off and selected. Here, each first stud 3 and second stud 4 selects 8 first gaskets 7 and second gaskets 8, which are put on the first stud 3 and the second stud 4 one by one, and a total of 32 first gaskets and 16 second gaskets are selected;

[0034] Finally, slowly put the second compression plate 2 on the first stud 3 and the second stud 4, making sure that it is parallel to the bottom plate 1 and the first compression plate 2, and first press the second nut 6 and then the first nut 5.

[0035] [Comparative Example]

[0036] The comparative test fixture has only the first stud, and the test sample is selected from 8 composite products stacked together with a total thickness of at least 25 mm as a test sample block for testing.

[0037] Select 8 pieces of the above composite products with a thickness of 3.15-3.29mm and stack them up to a total thickness of at least 25mm as a test sample and place them on the bottom plate. Use a 1mm glass sheet as a spacer in the middle of each composite product. There are 7 layers of spacers in total. 50% of the corresponding spacers are selected and put on the four studs;

[0038] Continue to put the first compression plate on the stud, select 8 pieces of the above composite products with a thickness of 3.15-3.29mm and a total thickness of at least 25mm as a test sample for testing, use a 1mm glass sheet as a spacer in the middle of each batch, a total of 7 layers of spacers, and select 75% of the corresponding spacers to put on the stud;

[0039] Finally place the second compression plate onto the studs and screw on the nuts.

[0040] According to the requirements of GB / T 6669-2008 national standard, the temperature is adjusted and the compression time is placed. After meeting the compression permanent deformation test requirements of GB / T 6669-2008 national standard, loosen the nut to take out the composite sponge, and after adjusting the state according to the requirements of GB / T 6669-2008 national standard, measure the final thickness of the sample, and calculate the compression permanent deformation of the composite sponge according to GB / T 6669-2008 national standard.

[0041] The specific implementation results are shown in Table 1

[0042] Table 1 Compression permanent deformation test results

[0043]

[0044]

[0045] From the above results, it can be seen that the results obtained by testing the permanent deformation rate of the composite sponge using a compression device are better than those obtained by using the comparative example, 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: 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 gasket (7), and a second gasket (8); 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) are fixedly connected to the base plate (1); the other end of the first stud (3) passes through the first gasket (7) and the compression plate (2); the first nut (5) is provided at the end of the first stud (3) passing through the compression plate (2); the other end of the second stud (4) passes through the second gasket (8), the compression plate (2 ), the second stud (4) passes through the compression plate (2) and is provided with a second nut (6) at the end thereof; wherein the number of the first stud (3), the first nut (5) and the first gasket (7) is at least 4, the number of the second stud (4), the second nut (6) and the second gasket (8) is at least 1, the first stud (3), the second stud (4), the first nut (5), the second nut (6), the first gasket (7) and the second gasket (8) are arranged parallel to each other, and the first stud (3) is arranged in sequence at a position close to 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.

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

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 the compression plate (2) are rectangular; the first studs (3) are respectively arranged 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 sizes of the base plate (1) and the compression plate (2) are both 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 permanent deformation rate of composite sponge according to claim 1, characterized in that: The second studs (4) are located on both sides of the center of the bottom plate (1) at a position 35 to 40 mm away from the edge.

5. The compression device for testing the 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), the number of the first through holes (9) is four, the number of the second through holes (10) is two, the first through holes (9) and the first studs (3) are in one-to-one correspondence, and the second through holes (10) and the second studs (4) are in one-to-one correspondence.

6. A method for using the compression device for testing the permanent deformation rate of composite sponge according to claim 1, characterized in that: The following steps are involved: Step 1: During installation, use a measuring tool to accurately measure the thickness d of the product, and evenly spread the test samples on the bottom plate (1) to ensure that the gaps between the test samples are uniform. According to the thickness of the test samples, the number of gaskets for each stud is selected = (product thickness mm*(1-compression %)) / 0.1 mm. If the number is not an integer, round it off to select the corresponding number of first gaskets (7) and second gaskets (8), and then put the corresponding number of first gaskets (7) and second gaskets (8) on each first stud (3) and second stud (4) one by one; Step 2: Finally, slowly put the compression plate (2) on the first stud (3) and the second stud (4), ensuring that it is parallel to the bottom plate (1), and first press the second nut (6) and then the first nut (5).

7. The method for using the compression device for testing the permanent deformation rate of composite sponge according to claim 6, characterized in that: The first nut (5) and the second nut (6) are tightened first according to the specified torque value using a suitable torque wrench to ensure that the torque is evenly applied to avoid uneven force on the studs; the remaining studs are tightened in turn using a diagonal tightening method, and the torque value of each tightening must be kept consistent to ensure that the pressure between the test plate and the product is evenly distributed.

8. Use of the compression device for testing the compression permanent deformation rate of a composite sponge as claimed in claim 1 in a composite sponge.

9. The use of the compression device for testing the permanent deformation rate of composite sponge according to claim 8, characterized in that: The height of the composite sponge ranges from 2 to 10 mm.

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