Method for processing complex large-sized plastic rubber panel appearance surface decoration

Abstract

The invention discloses a processing method for surface decoration of a large complex plastic panel which includes the following steps: a film is manufactured according to the appearance sculpt, pattern and character of a product; a film blanking die is manufactured, the film is blanked and the film in need of shaping is remained; a film shaping die is manufactured for shaping the film and obtaining the shaped film with the needed shape; an injection die is manufactured for injection and shaping; the injection die is designed and developed according to the structure of the product, the shaped film is arranged, positioned and arranged, then is injected and shaped to obtain an injection piece. The processing method for surface decoration of a large complex plastic panel solves the problems of tearing and scuffing easily appearing during the closed angle transition of the surface decoration of the large complex plastic panel as well as the pre-shaping of an injected sheet in the die, avoids the phenomena of drapes, bad wrapping and serious color difference generated at the crossed location, improves the yield of the product and enhances the appearance effect of the product.

Description

【Technical field】 [0001] The invention relates to the technical field of appearance surface decoration of complex large plastic panels, in particular to a method for treating the appearance surface decoration of complex large plastic panels used in household electronic products such as color televisions. 【Background technique】 [0002] Some household electrical appliances, such as rice cookers, refrigerators, and washing machines, use the in-mold decoration injection molding process on their appearance panels to obtain exquisite injection molding products. The appearance panels of these products are generally flat and smooth planes or slightly arc-shaped surfaces, and the use of in-mold injection molding generally does not cause major problems. However, for complex and large plastic panels, such as color TVs that are closely related to people's entertainment and life Machines generally have large dimensions, and sometimes due to modeling requirements, there will be some curv...

AI Technical Summary

Problems solved by technology

The appearance panels of these products are generally flat and smooth planes or slightly arc-shaped surfaces, and the use of in-mold injection molding generally does not cause major problems. However, for complex and large plastic panels, such as color TVs that are closely related to people's entertainment and life Machines generally have large dimensions, and sometimes due to modeling requirements, there will be some curved surfaces, right-angled or close-to-right-angled rapid transitions between surfaces, and the bending height is relatively large, or special three-dimensional patterns need to be designed on the appearance surface to reflect Special effects make the craft complex and difficult

For the surface decoration of these large and complex plastic appearance panels, in-mold injection molding is used in the sheet prefabrication process, which is not handled well, and it is prone to tearing, scratches, etc. During injection molding, due to improper positioning of the sheet and mold gate Unreasonable settings and improper selection of base material and color masterbatch may easily cause sheet extrusion, wrinkles at right angles or at the junction of curved surfaces, poor edge wrapping, serious color difference between base material and sheet, etc., resulting in low product yield, or even Unable to produce the satisfactory product required by the design

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