2-color formed lens

Abstract

The invention relates to a 2-color formed lens. The problem is to effectively inhibit appearance defects in a 2-color molded lens with an anti-fog coating film formed on the inner surface. A coveringpart (10Sb) is formed by extending from a joint surface (10b1) with a primary molded product (10P) along an inner surface (10Pa1) of a thick part (10Pa) of the primary molded product to cover the primary molded product at a body side run-in part (10Sa) of a secondary molded product (10S) formed along an inner surface (10b) of a 2-color formed lens (10) from a lens peripheral wall part (14) to a lens body part (12), thereby preventing a groove-shaped gap from being formed at a corner part (10Pb) of the primary molded product. Even if it takes a certain time or more before the completion of curing after the anti-fogging coating film (24) is formed on the inner surface (10b) of the lens, the occurrence of cracks around the corner of the primary molded article can be effectively suppressed.

Description

technical field [0001] The present invention relates to a two-color molded lens having an anti-fog coating film formed on its inner surface. Background technique [0002] Conventionally, a two-color molded lens composed of a primary molded product made of transparent resin and a secondary molded product made of opaque resin is known. [0003] As described in Patent Document 1, a two-color molded lens used as a vehicle lamp is generally configured to include a lens main body and a lens peripheral wall that rises from its peripheral edge toward the inner surface of the two-color molded lens. [0004] In this two-color molded lens, the primary molded product is wound from the lens main body to the lens peripheral wall along the outer surface of the two-color molded lens, and the secondary molded product is wound from the lens peripheral wall along the inner surface of the two-color molded lens. The part is wound into the lens body part. [0005] In addition, conventionally, h...

AI Technical Summary

Problems solved by technology

[0014] In particular, when forming a secondary molded product, the primary molded product placed in the mold is subjected to extrusion force due to the molten resin injected into the mold. Therefore, the corner of the primary molded product in the 2-color molded lens after molding is completed. Residual stress is generated around the part, therefore, cracks are more likely to occur

[0015] And, if cracks are formed around the corners of the primary molded product in this way, the cracks can be seen through the transparent lens body, so the appearance of the two-color molded lens will be defective.

[0016] Such a problem, even if an independent film forming process is used, or when the hard coating film is not formed on the outer surface as a two-color molded lens structure, it takes more than a certain period of time after the anti-fog coating film is formed on the inner surface of the lens until it is completely cured , it is also possible to generate problems

Images