Patent ID: 9164253
Filing Date: 2015-10-20
Classification: B29C,B29D,B29K,B29L,C03B,G02B

Abstract:
1. A method for producing a composite molded lens, the composite molded lens comprising a press-formed lens body and an injection-molded lens frame, the lens body having a lens portion and a flange portion surrounding the lens portion, the lens frame having an annular shape surrounding the flange portion and being integral with the lens body through the flange portion, the method comprising the steps of: placing a preform, being a lens material, between a first mold and a second mold; pressing the preform between the first and second molds until an outer peripheral portion of the preform projects into a cavity for forming the lens frame and thereby press-forming the lens body with an outer peripheral edge of the flange portion in the cavity; forming at least one of projections and grooves on the flange portion while press-forming the lens body, the projections and the grooves extending radially toward the outer peripheral edge of the flange portion, a height of the projection increasing toward the outer peripheral edge and a depth of the groove increasing toward the outer peripheral edge so that a recess or a protrusion is formed in an end face of the outer peripheral edge of the flange portion on a line extending from the projection or the groove; and forming the lens frame into the annular shape surrounding the flange portion and into contact with the outer peripheral edge of the flange portion in the cavity by injecting molten resin into the cavity for forming the lens frame without opening the first and second molds, wherein the projections are formed at a predetermined pitch on opposing surfaces of the flange portion so that the projections on one of the opposing surfaces coincide with projections on the other of the opposing surfaces.