Injection mold for producing biconvex lens

Abstract

The invention provides an injection mold for producing a biconvex lens, wherein the injection mold comprises an upper mold body and a lower mold body; a rotary disc is arranged at the lower end of the upper mold body, a plurality of upper mold cores and vacuum suction cups are arranged on the rotary disc, and an upper mold cavity is formed in the middle of each upper mold core; a first gear is arranged at the upper end of the lower mold body, and a plurality of lower mold cores are arranged on the edge of the first gear; a lower mold cavity is formed in the middle of each lower mold core, and a toothed belt meshed with the first gear is arranged on the edge of each lower mold core. According to the injection mold, the positions of the upper mold cores and the vacuum suction cups are converted through the rotary disc, after the mold is opened, the vacuum suction cups can be converted to the position above the lower mold cavity, a product in the mold cavity is sucked out through the vacuum suction cups, a conventional ejector pin type stripping device is replaced, and the problem that the cambered surface of the bottom of a biconvex lens is uneven due to a traditional ejector pin is solved.

Description

Technical field [0001] Technical Field The present invention relates to a mold, injection mold particularly relates to a process for producing a lenticular lens. Background technique [0002] Lenticular optical lens is a common, usually after the injection molding form. For the lenticular lens, a convex curved surface which ends complete the requirements, or likely to influence the optical effect. While the conventional injection mold, usually the top of thimble way the product, provided the thimble thimble bore of the mold cavity, since the top edge with a small gap pinholes, after injection, it is likely to cause a bottom convex arc surface irregularities bis . On the other hand, the conventional injection mold, usually in the ejection process, the cutting nozzle and the outlet displaced by injection product, this arrangement is likely to cause unevenness outlet, it affects its optical properties. Further, when the injection mold is generally subjected to injection molding, the...

AI Technical Summary

Problems solved by technology

For a biconvex lens, the curved convex surfaces at both ends require a complete surface, otherwise it will easily affect the optical effect

Conventional injection molds usually use thimbles to eject the product, and the thimbles are set in the thimble holes of the mold cavity. Since there is a small gap at the edge of the thimble holes, after injection molding, it is easy to cause the curved surface of the bottom of the biconvex lens to be uneven.

On the other hand, conventional injection molds usually use the misalignment of the injection molded product and the nozzle to cut the nozzle during the ejection process. This structure is likely to cause uneven nozzles and affect its optical properties.

In addition, when the general injection mold is used for injection molding, the raw materials are directly introduced into the mold cavity through the flow channel, and the injection pressure of the injection molding machine can only be controlled, but the flow rate of the material cannot be controlled.

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