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US 12,240,156 B2Granted
Injection molding device and method for injection molding
AssigneeLG Chem, Ltd.
InventorsInki Min, Cheol Hwan Hwang
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Abstract
An injection molding device according to an embodiment of the present disclosure includes a first mold including a first injection port through which a raw material is injected; a second mold including a heating member; a first movable mold facing the first mold or the second mold and having a first cavity formed therein; and a second movable mold facing the first mold or the second mold and having a second cavity formed therein, wherein the position of the first movable mold and the position of the second movable mold can be changed.
Claims13
A method for injection molding a resin comprising the steps of:
- injecting a raw resin material into a first cavity of a first movable mold facing a first mold and molding the material to produce a primary molded product;
- moving the position of the first movable mold so that a surface of the primary molded product contacts a second mold, without the primary molded product being taken out of the first cavity;
- heating the second mold to anneal the primary molded product at a temperature equal to or greater than a glass transition temperature of the resin, then cooling;
- and
- injecting a raw material into a second cavity of a second movable mold facing the first mold and molding the material to produce a secondary molded product,
- wherein an embossed or intaglio pattern is formed on a surface of the second moveable mold, and wherein annealing the primary molded product includes simultaneously forming a pattern corresponding to the embossed or intaglio pattern on a surface of the primary molded product.
3 more elements
Dependencies are inferred from the claim text.