A rapid testing device for the degree of rubber foaming

Abstract

This invention provides a rapid testing device for the degree of rubber foaming, comprising an upper template and a lower template. The lower template has a groove on its upper side, which includes a connected filling area and a foaming growth area. The foaming growth area has a strip-shaped structure, and the bottom walls of the filling area and the foaming growth area are flush. A scale line is provided on the upper side of the lower template corresponding to the foaming growth area. The upper template is detachably fixed to the upper side of the lower template. The advantages of this invention are: In use, the test material is filled into the filling area. After the upper and lower templates are closed and fixed, vulcanization is performed to allow the test material to foam, initially filling the foaming growth area. Once a certain length is reached, the vulcanization of the test material is completed. Afterward, the upper template is opened, and the scale line corresponding to the position where the material is filled is observed to determine the degree of foaming.

Description

Technical Field

[0001] This utility model belongs to the field of rubber foaming testing equipment, and in particular relates to a rapid testing device for the degree of rubber foaming. Background Technology

[0002] The degree of foaming of foamed rubber needs to be adjusted according to the usage environment (such as high cushioning requirements, sealing requirements, corrosion resistance requirements, sound absorption requirements, etc.). This is mainly because different usage environments have different requirements for material properties (such as density, elasticity, oil resistance, etc.). However, the same usage environment often requires a relatively fixed degree of foaming. The degree of foaming is related to the formulation design and vulcanization conditions. Therefore, the testing of the degree of foaming is particularly important in the development of rubber products. Utility Model Content

[0003] In view of this, the present invention aims to overcome the shortcomings of the above-mentioned problems in the prior art and proposes a rapid testing device for the degree of rubber foaming.

[0004] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0005] A rapid testing device for the degree of rubber foaming includes an upper template and a lower template. The lower template has a groove on its upper side, which includes a connected filling area and a foaming growth area. The foaming growth area has a strip-shaped structure. The bottom sidewalls of the filling area and the foaming growth area are flush. A scale line is provided on the upper side of the lower template corresponding to the foaming growth area. The upper template is detachably fixed on the upper side of the lower template.

[0006] Furthermore, the filling area has a fan-shaped groove structure, and the foaming growth area is located on the side of the filling area away from the arc surface. The length direction of the foaming growth area is set along the radial direction of the filling area, and the axis of symmetry of the foaming growth area coincides with the axis of symmetry of the filling area.

[0007] Furthermore, the foaming growth zone extends through the lower template.

[0008] Furthermore, the filler zone depth is 2mm, and the foaming growth zone length is 20mm.

[0009] Furthermore, a limiting edge is provided on the upper side of the lower template along the outer periphery of the groove. The inner side wall of the limiting edge and the upper side of the lower template form a limiting groove that communicates with the groove. A middle pressure plate with a horizontal cross-sectional dimension matching the horizontal cross-sectional dimension of the limiting groove is embedded in the limiting groove. The upper template, the middle pressure block and the lower template are then pressed together in sequence.

[0010] Furthermore, a positioning groove is provided at the bottom of the upper template. When the upper template is fixed on the upper side of the lower template, the inner side wall of the positioning groove is attached to the outer side of the limiting edge, and the bottom side wall is pressed against the upper side of the middle pressure plate. The bottom side of the middle pressure plate is pressed against the upper side of the lower template, and the bottom side of the upper template is pressed against the upper side of the lower template.

[0011] Furthermore, an auxiliary block integrally formed with the intermediate pressure plate is provided horizontally outward at the front end of the filling area corresponding to the intermediate pressure plate. The front end of the auxiliary block extends outward from the front end of the lower template, and the rear end of the intermediate pressure plate is aligned with or extends outward from the rear end of the lower template. A through groove is provided on the limiting edge corresponding to the auxiliary block, and a connecting groove connected to the positioning groove is provided on the positioning groove corresponding to the auxiliary block. The auxiliary block passes through the through groove and is embedded in the connecting groove.

[0012] Furthermore, guide posts are vertically fixed at the four corners of the lower template, and through holes are opened at the corresponding guide posts on the upper template. The guide posts are set through the corresponding through holes, and nuts located on the upper side of the upper template are screwed onto the guide posts.

[0013] Compared with the prior art, this utility model has the following advantages:

[0014] When using the rapid testing device for the degree of rubber foaming described in this utility model, the test material is filled into the filler area. After the upper and lower templates are closed and fixed, vulcanization is carried out to allow the test material to foam. The foaming growth area is filled and the vulcanization of the test material is completed after a certain length is reached. Then, the upper template is opened and the scale line corresponding to the position of the material filling is observed to determine the degree of growth of the foamed material. Attached Figure Description

[0015] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0016] Figure 1 This is an exploded view of the structure of the rapid rubber foaming degree testing device described in this embodiment of the utility model;

[0017] Figure 2 This is a schematic diagram of the rapid rubber foaming degree testing device according to an embodiment of the present invention;

[0018] Figure 3 This is a schematic diagram of the upper template structure according to an embodiment of the present utility model.

[0019] Explanation of reference numerals in the attached figures:

[0020] 1. Lower template; 11. Groove; 111. Filler area; 112. Foaming growth area; 12. Limiting edge; 13. Limiting groove; 14. Scale line; 15. Through groove; 16. Guide post; 2. Upper template; 21. Positioning groove; 22. Connecting groove; 23. Through hole; 3. Middle pressure plate; 31. Auxiliary block; 4. Nut. Detailed Implementation

[0021] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0022] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model 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 of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] As shown in the figure, a rapid testing device for the degree of rubber foaming includes an upper template 2 and a lower template 1. A groove 11 is formed on the upper side of the lower template 1, comprising a connected filling area 111 and a foaming growth area 112. The foaming growth area 112 has a strip-shaped structure, and the bottom walls of the filling area 111 and the foaming growth area 112 are flush. A scale line 14 is provided on the upper side of the lower template 1 corresponding to the foaming growth area 112. The upper template 2 is detachably fixed to the upper side of the lower template 1. In this embodiment, the test material is filled into the filling area 111. After the upper template 2 and the lower template 1 are closed and fixed, vulcanization is performed to allow the test material to foam, initially filling the foaming growth area 112. After reaching a certain length, the vulcanization of the test material is completed. Then, the upper template 2 is opened, and the scale line 14 corresponding to the position where the material is filled is observed to determine the degree of foaming.

[0026] The filling area 111 has a fan-shaped groove structure. The foaming growth area 112 is located on the side of the filling area 111 away from the arc surface. The length direction of the foaming growth area 112 is set along the radial direction of the filling area 111, and the axis of symmetry of the foaming growth area 112 coincides with the axis of symmetry of the filling area 111. This setting ensures that after the test material fills the filling area 111, it can be smoothly and evenly filled into the foaming growth area 112 during the foaming process.

[0027] The end of the foaming growth zone 112 is designed to penetrate the lower template 1 to prevent changes in rubber density when foaming continues after the foaming growth zone 112 is fully filled. In this embodiment, when using this rapid rubber foaming degree testing device for effective testing, the rubber is completely contained within the foaming growth zone 112 after foaming and does not overflow from the end of the foaming growth zone 112. If, during testing, it is found that the rubber overflows from the end of the foaming growth zone 112 after foaming, the test is considered invalid.

[0028] The depth of the filler zone 111 is 2mm, and the length of the foamed growth zone 112 is 20mm.

[0029] A limiting edge 12 is provided on the upper side of the lower template 1 along the outer periphery of the groove 11. The inner sidewall of the limiting edge 12 and the upper side of the lower template 1 form a limiting groove 13 that communicates with the groove 11. A middle pressure plate 3 with a horizontal cross-sectional dimension matching that of the limiting groove 13 is embedded in the limiting groove 13. The upper template 2, the middle pressure plate, and the lower template 1 are sequentially pressed and fixed together. In this embodiment, during use, the upper template 2, the middle pressure plate 3, and the lower template 1 are pressed tightly together to ensure the accuracy of the foaming degree test within the foaming growth zone 112 during the rubber foaming process.

[0030] The upper template 2 has a positioning groove 21 at its bottom. When the upper template 2 is fixed to the upper side of the lower template 1, the inner wall of the positioning groove 21 is attached to the outer side of the limiting edge 12, and the bottom wall is pressed against the upper side of the middle pressure plate 3. The bottom side of the middle pressure plate 3 is pressed against the upper side of the lower template 1, and the bottom side of the upper template 2 is pressed against the upper side of the lower template 1. In this embodiment, when the middle pressure plate 3 is embedded in the limiting groove 13, the upper side of the middle pressure plate 3 is flush with the upper side of the limiting edge 12. Furthermore, the positioning groove 21 is provided on the upper template 2 so that the upper template 2 and the lower template 1, the upper template 2 and the middle pressure plate 3, and the middle pressure plate 3 and the lower template 1 can all be pressed and fixed together, improving the reliability of the device.

[0031] An auxiliary block 31, integrally formed with the intermediate pressure plate 3, is horizontally outward at the front end of the filler area 111. The front end of the auxiliary block 31 extends beyond the front end of the lower template 1, and the rear end of the intermediate pressure plate 3 is aligned with or extends beyond the rear end of the lower template 1. This prevents the rubber from bulging upward into the foaming growth area 112 during the foaming process, which could lead to inaccurate testing. A through groove 15 is provided on the limiting edge 12 corresponding to the auxiliary block 31. A connecting groove 22, communicating with the positioning groove 21, is provided on the positioning groove 21 corresponding to the auxiliary block 31. The auxiliary block 31 passes through the through groove 15 and is embedded in the connecting groove 22, ensuring that the bottom side of the upper template 2 and the upper side of the lower template 1 can fit tightly together. In this embodiment, the auxiliary block 31 is provided on the front side of the intermediate pressure plate 3 to facilitate the disassembly and placement of the intermediate pressure plate 3 in the limiting groove 13.

[0032] Guide posts 16 are vertically fixed upwards at each of the four corners of the lower template 1. Through holes 23 are provided on the upper template 2 at the corresponding guide posts 16. The guide posts 16 pass through the corresponding through holes 23, and nuts 4 located on the upper side of the upper template 2 are screwed onto the guide posts 16. In this embodiment, the upper part of the guide post 16 has external threads, and nuts 4 located on the upper side of the upper template 2 are screwed onto the guide post 16. The upper template 2 and the lower template 1 are locked together by the cooperation of the nuts 4 and the guide posts 16.

[0033] The working process of this embodiment is as follows:

[0034] In use, a fixed amount of test material, generally 4-8g (accurate to 0.001g), is weighed and placed in the filling area 111, ensuring the material completely fills the area. The intermediate pressure plate 3 is then placed in the limiting groove 13. The upper template 2 and lower template 1 are then fixed together, and vulcanization is carried out according to the pre-set vulcanization conditions, causing the test material to foam and expand. As the foaming progresses, the material begins to fill the foamed growth area 112. Once a certain length is reached, the vulcanization of the test material is complete. Afterward, the upper template 2 and intermediate pressure plate 3 are opened, and the scale line 14 corresponding to the material filling position is observed to determine the growth rate of the foamed material.

[0035] This device can not only test the degree of foaming of materials during the product development stage, but also verify the stability of materials during mass production to determine product characteristics.

[0036] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for rapid testing of the degree of foaming of rubber, characterized in that: It includes an upper template and a lower template. The lower template has a groove on its upper side. The groove includes a connected filling area and a foaming growth area. The foaming growth area has a strip-shaped structure. The bottom sidewalls of the filling area and the foaming growth area are flush. A scale line is provided on the upper side of the lower template corresponding to the foaming growth area. The upper template is detachably fixed on the upper side of the lower template.

2. A device for rapid testing of the degree of foaming of rubber according to claim 1, characterized in that: The filling area has a fan-shaped groove structure. The foaming growth area is located on the side of the filling area away from the arc surface. The length direction of the foaming growth area is set along the radial direction of the filling area, and the axis of symmetry of the foaming growth area coincides with the axis of symmetry of the filling area.

3. The apparatus of claim 1, wherein: The foaming growth zone extends through the lower template.

4. The apparatus of claim 1, wherein: The filler zone depth is 2mm, and the foaming growth zone length is 20mm.

5. The apparatus of claim 2, wherein: A limiting edge is provided on the upper side of the lower template along the outer periphery of the groove. The inner wall of the limiting edge and the upper side of the lower template form a limiting groove that is connected to the groove. A middle pressure plate with a horizontal cross-sectional dimension matching the horizontal cross-sectional dimension of the limiting groove is embedded in the limiting groove. The upper template, the middle pressure block and the lower template are sequentially pressed and fixed together.

6. A device for rapid testing of the degree of foaming of rubber according to claim 5, characterized in that: The bottom of the upper template is provided with a positioning groove. When the upper template is fixed on the upper side of the lower template, the inner side wall of the positioning groove is attached to the outer side of the limiting edge, and the bottom side wall is pressed against the upper side of the middle pressure plate. The bottom side of the middle pressure plate is pressed against the upper side of the lower template, and the bottom side of the upper template is pressed against the upper side of the lower template.

7. A rapid test device for determining the degree of foaming of a rubber according to claim 6, characterized in that: An auxiliary block integrally formed with the intermediate pressure plate is provided horizontally outward at the front end of the filling area. The front end of the auxiliary block extends outward from the front end of the lower template, and the rear end of the intermediate pressure plate is aligned with or extends outward from the rear end of the lower template. A through groove is provided on the limiting edge corresponding to the auxiliary block. A connecting groove connected to the positioning groove is provided on the positioning groove corresponding to the auxiliary block. The auxiliary block passes through the through groove and is embedded in the connecting groove.

8. The apparatus of claim 1, wherein: Guide posts are vertically fixed at the four corners of the lower template. Through holes are opened at the corresponding guide posts on the upper template. The guide posts are set through the corresponding through holes and nuts are screwed onto the guide posts on the upper side of the upper template.

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