Injection mold for optical lens

Abstract

The invention provides an injection mold for optical lenses. The bottom of the upper mold is provided with a push-pull relief groove, and a push plate is arranged in the push-pull relief groove. The bottom of the push plate is provided with an upper molding surface. The top of the push plate passes through the first The spring is connected with the push-pull relief groove, the bottom of the upper mold is fixed with a linkage column, and the bottom of the linkage column is fixed with a magnet lifting column; the lower mold is provided with a mold cavity, and the bottom of the mold cavity is connected with a mold core guide hole, and the mold core guide hole The bottom of the mold core is connected with a lifting cavity, the mold core guide hole is slidably connected with a mold core column, the top of the mold core column is provided with a lower forming surface, the bottom of the mold core column is fixed with a top plate, and a first magnetophilic metal sleeve is arranged in the top plate. The bottom of the top plate is connected with the lifting cavity through the second spring, and a linkage guide hole is also provided in the lower die. The invention can avoid burrs and gaps at the edge of the injection molding cavity, has high processing efficiency, matches the surface of the ejection structure with the surface of the optical lens, and can ensure that the surface of the produced optical lens is smooth and free of defects.

Description

technical field [0001] The invention relates to an injection mold, and specifically discloses an injection mold for an optical lens. Background technique [0002] Optical lenses refer to transparent materials with one or more curved surfaces made of optical materials such as glass or resin, and are used in optical systems and other structures. When using resin to make optical lenses, it is necessary to use a mold to achieve molding. [0003] In the prior art, the molds used to make optical lenses mainly include upper and lower molds with upper and lower mold cavities and ejection structures. When the molds are closed, the upper and lower molds move close together. After the mold is opened, the ejection structure is used to eject the obtained optical lens. The operation is complicated. The ejection action is completed by the ejector pin. performance, and during the ejection process, the thimble can easily scratch the surface of the optical lens and form defects. Contents ...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the molds used to make optical lenses mainly include upper and lower molds with upper and lower mold cavities and ejection structures. When the molds are closed, the upper and lower molds move close together. After the mold is opened, the ejection structure is used to eject the obtained optical lens. The operation is complicated. The ejection action is completed by the ejector pin. performance, and during the ejection process, the thimble is also easy to scratch the surface of the optical lens and form defects

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