Production process for graphite cooling fin of battery cover

Abstract

The invention discloses a production process for a graphite cooling fin of a battery cover. The key point of the technical scheme is as follows: the production process comprises the following steps: using a graphite film, a weak rubber film and a PET (Polyethylene Terephthalate) film to form a first composite film; conveying the first composite film into a second knife holder, conducting die cutting to form an outer contour; adhering a double faced adhesive tape to the first composite film, rolling and recycling the weak rubber film and the PET film to form a second composite film; adhering ablue film and a black film to the lower part of the second composite film; locating the blue film on the lowest layer; adhering the PET film to the lower part of the blue film to form a third composite film, recycling the PET film on the surface of the double faced adhesive tape on the uppermost layer, and adhering a soft film to the upper surface of the double faced adhesive tape. A preformed hole and the contour of the cooling fin formed through die cutting are only cut to the upper surface of the PET film on the lowest layer; the soft film left after cutting is recycled to form a fourth composite film; and a piece of release paper is adhered to the upper surface of the double faced adhesive tape layer and a breaking point is cut to form a product. The production process has the advantage that the possibility of producing chippings in the die cutting process of the graphite film is reduced.

Description

technical field [0001] The invention relates to the production field of graphite heat sinks for battery covers, in particular to a production process for graphite heat sinks for battery covers. Background technique [0002] The mobile phone battery cover needs to ensure the performance of heat dissipation, so as to perform good heat dissipation on the mobile phone battery. Since graphite heat sink is an excellent heat-conducting and heat-dissipating material, existing battery covers are usually made of graphite heat sink. Graphite heat sink is composed of graphite film and multilayer film. Generally, it includes blue film, black film, ultra-thin double-sided adhesive tape and release paper. One side of blue film, black film, ultra-thin double-sided adhesive tape and release paper is all glued to the lining. The lining is torn off first during production. The rubber surface is exposed, and then glued and die-cut on a rotary die-cutting machine to finally form a product. ...

AI Technical Summary

Problems solved by technology

[0003] In the process of preparing graphite heat sinks in the prior art, after the raw graphite is bonded to the black film, it needs to be die-cut to form the outline of the mobile phone battery cover. In the process of die-cutting the outline, due to cutting on the surface of the graphite film Graphite film is generally formed by pressing graphite powder, and graphite debris is likely to be generated and scattered during the cutting process, which affects product quality.

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