公开(公告)号：US20170305051A1

公开(公告)日：2017-10-26

申请号：US15507340

申请日：2015-06-19

Applicant: KASAI KOGYO CO., LTD.

Inventor： Shinya HASHIMOTO ,  Hiroki KOMATSUZAKI

IPC: B29C45/37 ,  B29C45/26 ,  B29C45/17 ,  B29C45/16 ,  B29C45/00 ,  B29C45/28

CPC classification number: B29C45/37 ,  B29C45/0025 ,  B29C45/16 ,  B29C45/1704 ,  B29C45/2602 ,  B29C2045/0027 ,  B29C2045/1728 ,  B29C2045/2882

Abstract: A molding method for a synthetic resin molding that includes a molding body, a bent portion, and a flange. The bent portion and the flange are continuous in a longitudinal direction of the side edge. The flange includes a wide portion and a narrow portion. The molding method for the synthetic resin molding includes arranging a gate at a position corresponding to an end of one side of the flange in a longitudinal direction, setting a relationship S1≦S2, where S1 is a cross-sectional area of the wide portion of the flange, and S2 is a cross-sectional area of the narrow portion of the flange adjacent to and downstream from the wide portion in a flow of molten resin, and performing injection molding using a colored resin material containing a luster agent kneaded in the material.

公开(公告)号：US20170291336A1

公开(公告)日：2017-10-12

申请号：US15507384

申请日：2015-06-19

Applicant: KASAI KOGYO CO., LTD.

Inventor： Shinya HASHIMOTO ,  Hiroki KOMATSUZAKI

IPC: B29C45/27

CPC classification number: B29C45/2708 ,  B29C45/0013 ,  B29C45/0025 ,  B29C45/0046 ,  B29K2105/16 ,  B29K2505/02 ,  B29K2995/002 ,  B29K2995/0022 ,  B29L2031/3041

Abstract: A molding method for a synthetic resin molding that includes a molding body, a bent portion, and a flange. The bent portion and the flange are continuous in a longitudinal direction of the side edge. The flange includes a wide portion and a narrow portion. The molding method for the synthetic resin molding includes arranging a gate at a position corresponding to an end of one side of the flange in a longitudinal direction, performing injection molding using a colored resin material containing a luster agent kneaded in the material, and forming a protrusion along the side edge in the longitudinal direction at a back of a boundary portion between the flange and the molding body to reduce interference of flow of the molten resin from the flange toward the molding body during the injection molding.