Equipment for molding optical glass

Abstract

An optical lens molding device includes a first mold, a second mold, two inner sleeves and an outer sleeve. Wherein, the second mold and the first mold have a first coefficient of thermal expansion. The two inner sleeves fit outside the first mold and the second mold respectively, and have a second coefficient of thermal expansion. In addition, the outer sleeve has a first inner diameter and a second inner diameter, and the first mold and the second mold fit in the first inner diameter, and form a mold cavity between the two molds, and the two inner sleeves It then fits into the second inner diameter. In addition, the outer sleeve has a third coefficient of thermal expansion, and the first and second coefficients of thermal expansion are respectively greater than the third coefficient of thermal expansion. Therefore, the inner sleeve can improve the shortcoming that the distance between the first and second molds and the outer sleeve becomes larger due to heat, which leads to poor quality of molded optical lenses.

Description

technical field [0001] The present invention relates to an optical lens molding device, and in particular to an optical lens molding device capable of improving the optical axis inclination and deviation of the optical lens. Background technique [0002] In the molding technology of known aspheric optical lens, usually all are to utilize mold to cooperate two molds (core) to form mold cavity, make the softened glass material (gob) be molded into the desired shape under high temperature environment. The desired shape, and obtain the desired optical lens after cooling. There is usually a gap between this mold and mold assembly, so that the mold can be easily assembled with the mold. However, in a high-temperature environment, both the mold and the mold will expand due to heat, causing the distance between them to become larger, making it easy for the mold to tilt or shift during assembly. Therefore, the molded optical lens has an optical axis tilt or optical axis offset prob...

AI Technical Summary

Problems solved by technology

[0007] To sum up, due to the high temperature environment, the degree of thermal expansion of the upper mold and the lower mold is smaller than that of the outer sleeve, resulting in a larger distance between the mold and the outer sleeve, making the upper mold prone to inclination or misalignment. shifting phenomenon

Therefore, the optical lenses molded by the known optical lens molding device tend to have the problem of optical axis inclination or deviation, so that during the centering (centering) process, the difficulty of centering increases, and most of them cannot find the correct position. The position of the optical axis, thereby reducing the pass rate of the assembly process

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