Preparation method of PU putamina having various textures and color diversification

Abstract

The invention relates to a production method of a multi-grain and color-varied PU film shell, which aims at forming grain on the surface of a plastic shell. Firstly, patterns are processed inside a die cavity of a die, but carving patterns in the die cavity is not only expensive but also difficult; in addition, some patterns can not be carved. The production method of the invention mainly select a PU, polyurethane film shell with demand grain and color, and the film shell is put inside a preset shaped thermoplastic die and is pressed into shell surface shape through the thermoplastic die, and then a PU molding body with the shell surface shape and surface patterns and color is moved to an ejecting molding die, fused plastic materials ejected are combined with the PU molding body, thus forming the shape of the die cavity. After being cooled and taken out, a colloid shell with surface pattern and color is obtained.

Description

technical field [0001] The present invention provides a method for manufacturing a PU film shell with various textures and color changes, and in particular, provides a method for forming patterns and colors of plastic surface layers that can be manufactured in small quantities and can be easily achieved. Background technique [0002] see figure 1 As shown, it is a conventional injection molding mold, which mainly includes a male mold 1 and a female mold 2. If you want to produce a housing for a digital electronic product today, and hope that the surface of the digital electronic product housing can show a lattice pattern or a honeycomb Concave-convex pattern... When there are beautiful patterns or colors, it is necessary to process the opposite concave-convex pattern in the corresponding mold cavity 3, so that when the plastic material (acrylic-butadiene-styrene polymer (ABS), polycarbonate ( When the Polycarbonate (PC)) is injected into the mold cavity 3 to form the shell,...

AI Technical Summary

Problems solved by technology

[0010] The technical problem to be solved by the present invention: the known method of forming pattern on the surface of the shell mainly uses the mold to process the opposite concave-convex pattern at the corresponding position inside the mold cavity, so that when the plastic material is injected into the mold, that is, The convex and concave patterns on the surface can be formed at the same time, but the production cost of the mold is expensive, and the concave and convex patterns are processed in the mold cavity, which is not easy to process and expensive to manufacture; when the number of shells to be produced for one pattern is small, the cost is too high and unfavorable for production

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