公开(公告)号：US10549464B2

公开(公告)日：2020-02-04

申请号：US15507384

申请日：2015-06-19

Applicant: KASAI KOGYO CO., LTD.

Inventor： Shinya Hashimoto ,  Hiroki Komatsuzaki

IPC: B29C45/27 ,  B29L31/30

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.

公开(公告)号：US10369733B2

公开(公告)日：2019-08-06

申请号：US15507340

申请日：2015-06-19

Applicant: KASAI KOGYO CO., LTD.

Inventor： Shinya Hashimoto ,  Hiroki Komatsuzaki

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

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.