UV printing process for plastic shells

Abstract

The invention discloses a UV printing process for plastic shells. The printing process comprises the steps that (1) a PC board and a PMMA and PC composite board are selected; (2) an image-text is printed on one side of the PC board in a UV printing manner; (3) the printing surface of the PC board in the step (2) is coated with a protection film; (4) the other surface, without being coated with thefilm, of the PC board in the step (3) is subjected to UV transfer printing, electroplating and silk-printing bottom cover; (5) the protection film of the PC board in the step (4) is torn off; (6) thePC surface of the PMMA and PC composite board is attached and pasted to the UV printing surface of the PC board in the step (5) through a UV glue transfer mode, and a composite board is obtained after UV curing; (7) the composite board in the step (6) is subjected to high pressure hot pressing molding; (8) the PMMA surface of the semi-finished product in the step (7) is hardened; (9) CNC appearance finished-product cutting is conducted on the semi-finished product in the step (8); and (10) the PMMA surface of the semi-finished product in the step (9) is hardened.

Description

technical field [0001] The invention relates to the technical field of printing technology, in particular to a UV printing technology for plastic shells. Background technique [0002] In the current 5G era, due to signal problems, the back cover of the mobile phone will no longer be able to use metal materials with strong signal shielding. Non-metallic ceramics / glass / plastic materials are widely used. On the other hand, transparent materials are usually used for glass and plastic materials, and surface effects are decorated on the inner layer. At present, various colors required for surface appearance are completed by silk screen printing, spraying, dyeing, electroplating and other methods. The mobile phone back cover made of the existing composite sheet is made of PMMA+PC composite sheet, and the first layer of color layer is sequentially made on the PC surface of the material; the second layer is used as a UV transfer layer to achieve a certain optical effect; the third l...

AI Technical Summary

Problems solved by technology

The screen printing method has low precision, it is difficult to control the thickness and uniformity of the ink, and the color difference in mass production is large, so it can only make full-color or partial characters

Unable to achieve fine gradients or patterns; dyeing / spraying can only be done in a single color and requires a fixed direction