Technology for preparing in-mould ornament

Abstract

Disclosed is preparation technique for a decoration piece in a die, comprising the following steps: firstly, a vignette is printed on the surface of a transparent substrate material with ink; secondly, the printed film is treated under high pressure to be modeled into the needed shape and the redundant margin part is cut off. The high pressure treatment is done with a high-pressure molding machine and the technique parameters are that the upper and the lower heating temperature are between 280 DEG C and 380 DEG C; the temperature of the hot air is between 250 DEG C and 350 DEG C; the preheating temperature of the die is between 60 DEG C and 120 DEG C; the die closing time is from 6 to 20 seconds; the molding time is from 7 to 20 seconds; the exhausting time is from 3 to 8 seconds; the die closing speed is from 50 to 100 percent and the die opening speed is from 50 to 100 percent; thirdly, the printed film in a certain shape is put into the cavity of the die and thermoplastic resin is injected to make the film into a product; the parameters of the molding technique are subject to the thermoplastic resin. The invention is the technique of veneering at the same time with injection molding; the product and the decorative printed material are compounded into a whole and solid molded product can be printed with a decorative vignette, making the product having both functional effect and decorative effect.

Description

technical field [0001] The present invention relates to a process for preparing in-mold decorations used in the manufacture of resin (plastic) molded articles having a decorative surface. In particular, the present invention relates to a process for producing in-mold decorations suitable for the production of casings for computers, cameras, mobile phones, etc., and resin molded articles such as vehicle instrument panels and vehicle tail light indicators. Background technique [0002] At present, it manufactures computers, cameras, mobile phones, vehicle instrument cluster housings, air-conditioning control panels, household electrical control panels, and taillight indicators for vehicles, etc. Its surface decoration, such as patterns, characters, numbers, etc. are all printed on the finished product by spraying, water transfer printing, etc. after the product is formed. Such a method has the following technical problems: 1. The bonding strength between the printing layer of...

AI Technical Summary

Problems solved by technology

This method has the following technical problems: 1. The bonding strength between the printing layer of patterns, characters and numbers and the substrate is not enough. After a long time of use, it is easy to fall off, which affects the aesthetics of the product.

2. The organic solvent used in spraying has certain toxicity, and there is a problem of environmental pollution

3. As the spraying method is limited by technology, there are certain limitations and deficiencies in color and color levels

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