Thick wall plastic part surrounding type layered injection molding method and mold structure and lens product thereof

Abstract

The invention discloses a thick wall plastic part surrounding type layered injection molding method and a mold structure and a lens product thereof, and relates to injection molding of plastic or plastic state matter and method and equipment of injection molding, in particular to a thick wall injection product surrounding type layered injection molding method, a special mold structure used for implementing the method and a car lamp lens product manufactured with the method. An intermediate plate is arranged between a fixed mold plate and a movable mold plate and is rotated to conduct core rotation operation, a middle cavity which is in the empty cavity state after piece taking operation is carried out is rotated to a first station, and die assembly is carried out to form a molding cavity of a primary mold of the product; the intermediate plate carrying the primary mold of the product is rotated to a second station, die assembly is carried out to form secondary mold forming cavities surrounding the two sides of the primary mold of the product, and therefore multi-layer injection molding is achieved; during injection molding of a second layer, shrinking supplementing is carried out on absorption shrinking occurring on a first layer, so that it is guaranteed that condensation shrinking of secondary molds of the product is even, and appearance filling is full; and the optical performance requirement of a headlamp lens is met, the production period is shortened, and the injection molding production efficiency is improved.

Description

technical field [0001] The present invention relates to the injection molding product of plastic or plastic state substance and its manufacturing method and equipment, especially relate to the enveloping type layered injection molding method for thick-walled injection molding product and the special mold structure for implementing this method, and adopt this method to manufacture The light distribution mirror products of car lights. Background technique [0002] At present, LED headlight mirrors have begun to become the trend of automotive headlight design. Since there are many electronic units in LED headlights, there are requirements for the weight control of the whole light, and the weight reduction of parts has become the most important method. Due to the complex geometric shapes of lenses, light guides and reflectors in automotive lamps, it is most feasible to replace traditional glass optical components with PC materials (polycarbonate plastics) or BMC materials (bulk ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a thick-walled layered injection molding method that can satisfy both the injection molding of thick-walled parts and the optical properties of parts, so as to solve the problem that the optical properties of thick-walled lenses manufactured by existing injection molding methods and equipment cannot meet the design requirements. technical problem

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