Inner-mould ornamental plastic member capable of being completed by ordinary injection die and its production method

Abstract

The invention provides a mold decoration plastic made by common injection mold. It comprises plastic base, sheet metal compounded with plastic base, and decoration flexible layer containing patterns and words compounded with sheet metal. The thickness of sheet metal is 0.1-1.2mm, the rigidity is good, and the cost is low. The invention also provides the manufacturing method. The production rate and rate of finished products are high.

Description

Technical field: [0001] The invention relates to a surface decoration technology of a plastic part, in particular to a plastic part suitable for surface decoration of household appliances and electronic product shell decorations, etc., which can be completed in an ordinary injection mold and a manufacturing method thereof. Background technique: [0002] At present, in the in-mold decoration process, the following process steps are generally adopted: on one side of a transparent plastic film (such as a polycarbonate film, a polyethylene terephthalate film), the oil film layer on the decorative surface of the pattern and text is generated by printing. The printing method can be screen printing, film printing and digital printing according to specific conditions (if necessary, a primer can be coated on the film to enhance the adhesion of the ink). The film is cut and then three-dimensionally formed with a forming mold. Put the formed film into a special injection mold for posi...

AI Technical Summary

Problems solved by technology

[0004] 1. In general, the thickness of the plastic film selected is about 0.1-0.3mm. The rigidity of the formed plastic film after three-dimensional molding is poor, especially when it is large in size (such as a size above 20cm). Positioning requirements are more stringent

In the subsequent injection molding process, it will also be impacted by high-temperature and high-pressure hot-melt plastics, which is easily deformed and wrinkled.

At present, the solution to this problem is generally to perform more complicated positioning and clamping of the formed film placed in the cavity of the injection mold, that is, it is necessary to add complex positioning and clamping devices on the basis of ordinary injection molds.

Therefore, until now, this process has not been adopted on a large scale.

[0005] 2. During injection molding, the high-temperature and high-pressure hot-melt plastic will directly wash away the printing ink layer on the back of the plastic film, which is easy to cause the ink layer to be damaged, especially the ink layer at the gate is most likely to be washed out.

However, the plastic film protective layer used in this method still needs special positioning and clamping in the injection mold due to its insufficient rigidity.

And it is also easy to deform due to the influence of high temperature during the injection molding process, that is, there are deficiencies as described in question 1

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