Manufacturing method and injection mold for multi-layer lens

Abstract

The invention discloses a manufacturing method and an injection mold for a multi-layer lens. The lens is manufactured through two times of injection molding; firstly, a basic layer lens is subjected to injection molding; and a top layer lens and a bottom layer lens are subjected to injection molding at the same time, and the top layer lens, the basic layer lens and the bottom layer lens are bonded into a whole. The basic layer lens formed during injection molding is placed on the middle portion of a mold cavity of the injection mold; the mold cavity is spaced into an upper cavity and a lower cavity; by performing injection molding on a feeding port of the basic layer lens, raw materials enter the upper cavity and the lower cavity correspondingly through an injection molding channel communicated with the feeding port; the upper cavity is used for performing injection molding on the top layer lens; and the lower cavity is used for performing injection molding on the bottom layer lens, and the top layer lens and the bottom layer lens are bonded into a whole. The injection mold is used for injection molding of the multi-layer lens and comprises an upper cover, a lower cover and a mold frame which comprises an upper frame and a lower frame; the upper frame and the lower frame are connected together in a hinged manner; the upper cover is embedded into the upper frame; the lower cover is embedded into the lower frame; and when the upper frame and the lower frame are closed, inner cavities of the upper cover and the lower cover are closed to form the mold cavity.

Description

technical field [0001] The invention relates to the technical field of optical lenses, in particular to a method for manufacturing a multilayer lens and an injection mold thereof. Background technique [0002] At present, injection molding is usually used to make lenses and light distribution mirrors. When injection molding is used for lenses with thicker lenses, the cooling and forming time is longer, and the cooling and solidification time of different positions on the lens is different, and there is a large time difference. As a result, there are large differences in light transmittance, refractive index, and clarity at different positions of the lens, which reduces lens quality and production efficiency. Contents of the invention [0003] In order to shorten the injection molding time of the lens, reduce the difference in light transmittance and clarity at different positions of the lens, and improve the quality of the lens, the invention provides a method for manufact...

AI Technical Summary

Problems solved by technology

[0002] At present, injection molding is usually used to make lenses and light distribution mirrors. When injection molding is used for lenses with thicker lenses, the cooling and forming time is longer, and the cooling and solidification time of different positions on the lens is different, and there is a large time difference. As a result, there are large differences in light transmittance, refractive index, and clarity at different positions of the lens, which reduces the quality of the lens and production efficiency

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