Core device and technology for preparation of electromagnetic shielding rubber
An electromagnetic shielding and rubber technology, which is applied in the core device field of preparing electromagnetic shielding rubber, can solve problems such as poor fluidity, difficulty in filling metal particles, unstable electrical contact, etc., and achieve the effect of electromagnetic shielding performance guarantee
Active Publication Date: 2013-05-29
SHENZHEN COTRAN NEW MATERIAL CO LTD
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Problems solved by technology
[0002] Electromagnetic shielding rubber is widely used in telecommunication cabinets. It plays the role of waterproof and moisture-proof, and has the function of electromagnetic shielding. At present, electromagnetic shielding rubber is usually made by mixing conductive metal particles and rubber matrix. Because the rubber is in the molten state The fluidity is so poor that it is difficult to add metal particles to the rubber. At the same time, due to the elasticity of the rubber, the electrical contact between the metal particles is unstable, resulting in a larger impedance of the rubber and a weakened electromagnetic shielding effect.
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[0021] In order to facilitate the understanding of those skilled in the art, the present invention will be further described below in conjunction with the embodiments and accompanying drawings, and the contents mentioned in the embodiments are not intended to limit the present invention.
[0022] A core device for preparing electromagnetic shielding rubber according to an embodiment of the present invention, such as figure 1 As shown, the core device includes a bracket, a grinding wheel, a metal block and a pressure device. The block-shaped bismuth-tin alloy 2 and the copper block 3 are closely fixed on the bracket on which the grinding wheel 1 is installed. The first constant pressure 4 produced by the pressure device Acting on the block-shaped bismuth-tin alloy 2, the second constant pressure 5 produced by the pressure device acts on the copper block 3, so that the block-shaped bismuth-tin alloy 2 and copper block 3 are under the first pressure 4 and the second pressure. 5, ...
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The invention relates to a core device and a technology for preparation of electromagnetic shielding rubber. Conductive particles in the electromagnetic shielding rubber come from metal debris generated in a grinding process, wherein a tin-bismuth alloy has a very low melting point, can melt in the grinding process and is firstly attached to the surface of sand of an abrasive wheel, then in the grinding process of a copper block, the tin-bismuth alloy quickly adheres to the surface of ground copper debris, and a part of the tin-bismuth alloy debris is also directly sprayed on the surface of a rubber film along with the copper debris; next, the procedures that the metal debris is sprayed on the rubber film and then the rubber film is folded and heated are carried out for multiple times, so that the metal debris can be well mixed with the rubber film; and after the rubber is shaped and made into a product, the product is further subjected to heating treatment, so that a complex metal framework is formed in the rubber and can deform accordingly in a certain range along with the stretch and the retraction of the rubber without any influence on the conductive performance, and therefore the electromagnetic shielding performance of the rubber can be guaranteed.
Description
technical field [0001] The invention relates to the technical field of rubber manufacturing, in particular to a core device and process for preparing electromagnetic shielding rubber. Background technique [0002] Electromagnetic shielding rubber is widely used in telecommunication cabinets. It plays the role of waterproof and moisture-proof, and has the function of electromagnetic shielding. At present, electromagnetic shielding rubber is usually made by mixing conductive metal particles and rubber matrix. Because the rubber is in the molten state The fluidity is so poor that it is difficult to add metal particles to the rubber. At the same time, due to the elasticity of the rubber, the electrical contact between the metal particles is unstable, which leads to the increase of the impedance of the rubber and the weakening of the electromagnetic shielding effect. [0003] Therefore, there is a need for a core device and process for preparing electromagnetic shielding rubber t...
Claims
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Login to View More IPC IPC(8): B24B19/00B24B55/06
Inventor 周东周长明
Owner SHENZHEN COTRAN NEW MATERIAL CO LTD