A three-color injection molding method for a light distribution mirror of a car light and the mold kit used

Abstract

The invention provides a three-colour injection moulding method of car light lens and die item thereof, and the car light lens has a three-colour overlapping structure, and the die item is composed of two dies, wherein, the die A completes injection moulding of the first and the second colors, and the die B completes the injection moulding of the third color, and the two dies are arranged on a revolving stage of the injection machine side by side from left to right. The die A comprises a fixed die core, a movable die core A, a movable core and a loose core block, and the die B comprises a fixed die core B and a movable die core B, and the movable die core B and the movable die core A have the same structure, and the fixed die core B and the fixed die core B enclose a injection moulding cavity of the third color. The invention only requires two dies, thereby saving the cost of the product tool die, improving production efficiency and reducing raw material cost.

Description

technical field [0001] The invention relates to an injection mold, in particular to a three-color injection mold and method. Background technique [0002] At present, two-color plastic products are produced using two-color injection molds, while three-color plastic products need to use three-color injection molds. [0003] For example, the rear light distribution mirrors in the automobile market used to use two colors (i.e. two-color injection molding): red and white / pink. is 180°, and the molding of two-color products is realized by rotating the movable mold once, that is, rotating 180°. [0004] However, with the continuous improvement of consumers' aesthetics and quality requirements, as well as the continuous improvement of OEMs' requirements for car styling, car rear light mirrors have begun to use three-color matching structures, usually white, red and pink. color, which requires the use of three-color injection molds and processes. For existing implementations, see ...

AI Technical Summary

Problems solved by technology

[0005] It can be seen that compared with two-color injection molding, three-color injection molding needs to use one more mold, and generally speaking, the cost increases by about 1 million RMB

At the same time, because the mold will open and close one more time, the molding cycle of the product will be increased (about 10S), which will reduce the production efficiency of the product virtually.

In addition, due to the limitation of the mold structure and process, in the three-color scheme of the traditional automotive rear light distribution mirror, the pink light distribution mirror area and the white light distribution mirror adopt a double-layer overlapping method, which consumes more materials

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