Preparation method of plastic mobile phone rear cover

Abstract

The invention discloses a preparation method of a plastic mobile phone rear cover, compared with the prior art, the produced plastic mobile phone rear cover (6) is provided with a hole site (7) for mounting a camera, and four corners and four sides of the plastic mobile phone rear cover (6) are provided with fixedly connected reinforcing ribs (8). The reinforcing rib (8) and the plastic mobile phone rear cover (6) are seamlessly and fixedly connected or integrally formed, and the plastic mobile phone rear cover (6) sequentially comprises a shading layer (5), a reflecting layer (4), a shell layer (1), a texture layer (2) and a functional coating (3). A series of problems existing in the plastic mobile phone rear cover manufactured by the mobile phone shell rear cover manufacturing process are solved.

Description

technical field [0001] The invention relates to the field of plastic mobile phone back cover manufacturing, in particular to a preparation method of a plastic mobile phone back cover. Background technique [0002] At present, there are many problems in the process of using optical-grade transparent plastic to make plastic mobile phone back cover. For example, the conventional practice is to harden the optical-grade transparent plastic after injection molding, and then attach the explosion-proof film after texture transfer, coating and screen printing. That is, a plastic electronic product rear case with a three-dimensional background pattern is obtained. However, during this process, the coating layer is prone to rupture, and the explosion-proof film layer will be squeezed and deformed, resulting in obvious orange peel lines, and even poor appearance of falling off, especially The thicker the adhesive layer and the substrate, the greater the extrusion deformation of the adhe...

AI Technical Summary

Problems solved by technology

[0002] At present, there are many problems in the process of using optical-grade transparent plastics to make plastic mobile phone back covers. For example, the conventional practice is to harden optical-grade transparent plastics after injection molding, and then attach the explosion-proof film after texture transfer, coating and silk screen printing. That is to say, a plastic electronic product back shell with a three-dimensional background pattern is obtained. However, the coating layer is prone to cracking during the process, and the explosion-proof film layer will be squeezed and deformed, resulting in obvious orange peel patterns, and even poor appearance of falling off, especially The thicker the adhesive layer and substrate, the greater the extrusion deformation of the adhesive layer and the worse the appearance effect

At the same time, the high reflectivity coating will magnify the appearance defects when passing through the adhesive layer

Not only that, when using a plastic mold for UV transfer printing, the separation performance is poor, and a release layer is generally coated, such as a fluorine coating or a metal layer that reduces surface tension, but as the number of uses increases, the coating or metal layer will Gradually destroyed, resulting in mold failure

Moreover, there is no protective measure on the edge of the plastic mobile phone back cover, which is easy to be lost during installation

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