Optical component molding method, molding device, and optical component

Abstract

An object of the present invention is to provide a method and apparatus for forming an optical member that does not require a large-sized forming apparatus and has a short forming cycle. The method of forming an optical member by using a cavity C divided by a pair of closed molds comprises parting the cavity C in the closed mold direction by using a core (40) whose part is held by the parting surfaces (21, 31) of the molds, performing primary forming on a parting cavity (C1, C2), and forming a new cavity (C3) by taking out the core (40) to perform secondary forming (lamination forming). After all the seven steps of insertion, closing, ejection, open (take-out core), close mold, injection molding, open mold (take out the molded article), the forming cycle is short.

Description

technical field [0001] The present invention relates to a molding method for molding an optical component such as a projecting convex lens, a molding device, and an optical component shaped by the same method. Background technique [0002] Patent Document 1 below discloses a prior art of a lamination molding method of projection convex lenses such as LED lighting, a molding apparatus, and an optical component (convex lens) molded by the same method. [0003] Specifically, Patent Document 1 describes a rotary multi-layer molding device, which is arranged along the circumference on the opposing parting surfaces of a pair of left and right molds (movable side and fixed side) that can move closer and apart. Eight molding surfaces that divide the cavity are formed at equal intervals, and injection molding is performed while intermittently rotating the movable side mold around the horizontal rotation axis using a rotary drive mechanism. [0004] That is to say, the eight molding ...

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Problems solved by technology

[0007] However, in the above-mentioned Patent Document 1, since the cavity is provided at eight places around the horizontal rotation axis of the pair of left and right molds (movable side and fixed side), first, the molding equipment is large.

[0008] Second, in order to form a convex lens made of resin, it is necessary to repeat the series of processes of mold closing, injection, pressure holding, mold opening, and rotating the movable side mold many times (for example, eight times). The time, the so-called long forming cycle

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