Sealing strip, electronic device and preparation method of sealing strip

Abstract

A sealing strip (10) comprises an electronic device of the sealing strip and a preparation method of the sealing strip. The sealing strip (10) comprises a foaming rubber inner core (101) and a physical rubber protection layer (102) that covers an outer surface of the inner core (101). The preparation method of the sealing strip comprises the following steps: providing an inner layer material cylinder of a dual-material extrusion device with a foaming rubber extrusion raw material, and an outer layer material cylinder with a physical rubber extrusion raw material; and extruding the sealing strip (10) through the dual-material extrusion device and forming at a time. The sealing strip (10) has advantages of a large compression range, low compression force, good compression resilience, not easy to be damaged and a simple preparation process.

Description

technical field [0001] The invention relates to the sealing field, in particular to a sealing strip, electronic equipment and a preparation method of the sealing strip. Background technique [0002] With the development of science and technology, electronic equipment has been rapidly developed and widely used. Since the electronic equipment enclosure needs to provide a reliable environment for the internal components, PCBA and its parts, users have requirements for the sealing and protection of the electronic equipment enclosure. And reliability requirements are getting higher and higher. In order to achieve a tight, continuous closed and reliable housing, elastic seals are usually used as sealing packing to achieve effective sealing protection between the contact surfaces of the housing to prevent moisture, dust, etc. Penetrates into electrical equipment. For large housings of communication equipment with the same sealing cross-section, extruded sealing strips are generall...

AI Technical Summary

Problems solved by technology

[0003] Among the existing extruded elastic sealing strips, most of them are made of silicone rubber, and there are two types of cross-section: solid entity and hollow entity. For the solid entity sealing strip, the protection ability of IPX7 required by electronic equipment must be achieved. , due to the narrow range of compression, the range of tolerance is small, therefore, when the compression is too small, the sealing effect cannot be achieved, and when the compression is too large, the compression force will increase sharply, causing the shell to be sealed to deform; and the solid body Sealing strips have high requirements on the accuracy (dimensions, flatness) of the sealing strip installation groove, so it increases the processing difficulty and production cost for the housing of large electronic equipment

The hollow solid sealing strip solves the above-mentioned problems on the solid solid sealing strip, improves the tolerance of the sealing strip, and has a wide compression range, but the existing problem is that when the compression amount is large, it is easy to close the hollow and cause the seal to fail. , at the same time, its compression resilience is worse than that of solid solid sealing strips. For a sealing strip whose height exceeds 1.5 times its width, it is easy to lose stability after compression

In order to solve the above problems, foamed sealing strips have appeared, but the foamed sealing strips are easily damaged and invalidated under extrusion and bumping.

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