公开(公告)号：US12226940B2

公开(公告)日：2025-02-18

申请号：US17595952

申请日：2020-09-29

Applicant: Daiichi Seikosha Co., Ltd.

Inventor： Yasuhiko Ishida

IPC: B29C45/00 ,  B29B7/00 ,  B29B7/42 ,  B29B7/88 ,  B29C45/03 ,  B29C45/08 ,  B29C45/50 ,  B29C45/60 ,  B29C48/00 ,  B29C48/53 ,  B29C48/645 ,  B29C48/65 ,  B29C48/655

Abstract: Provided are a molding screw and an FBI molding machine using the same for manufacturing resin molded articles for reduced manufacturing variation with use of a resin powder, an additive, and a mixture material constituted by an inorganic material or an organic material. The molding screw can include a feeding portion for feeding a molding material, a compressing portion, and a metering portion that extend continuously from the feeding portion. The feeding portion and the compressing portion each can be provided with a spiral flight. The flight of the compressing portion can include multiple sub flights that extend in a spiral manner in a screw axis direction. The sub flights can each have a polygonal shape with rounded corner portions, and are arranged such that the corner portions are shifted by a set angle with respect to the screw axis.

公开(公告)号：US12220850B2

公开(公告)日：2025-02-11

申请号：US17996173

申请日：2021-04-14

Applicant: Daiichi Seikosha Co., Ltd.

Inventor： Yasuhiko Ishida

IPC: B29C45/60 ,  B29C45/00 ,  B29C45/18 ,  B29C45/47 ,  B29K505/10

Abstract: An object is to manufacture molded bodies having a small variation among products even if the mixture amount of a metal powder is increased when molding is performed by directly introducing not only a metal powder but also a powdered resin into an injection molding machine.
In a metal powder mixed resin molded body manufacturing method for manufacturing a molded body by kneading a molding material including a metal powder, a thermoplastic resin powder, and an additive agent, molding is performed by an injection molding machine in which a molding screw is arranged. The molding screw of the injection molding machine includes a feeding portion, a compressing portion, and a metering portion that are continuously and integrally provided, the feeding portion and the compressing portion are constituted by an one-line spiral flight, the flight of the compressing portion includes a plurality of sub-flights that extend in a spiral manner in a screw axis direction and the sub-flights each have a polygonal shape with rounded corner portions, and the sub-flights are arranged such that the corner portions are shifted by a set angle in a circumferential direction about the screw axis, and the metering portion is provided with a plurality of blending/aligning portions each having gear-like protrusions and recesses in a circumferential direction about the screw axis.

公开(公告)号：US20230219270A1

公开(公告)日：2023-07-13

申请号：US17996173

申请日：2021-04-14

Applicant: Daiichi Seikosha Co., Ltd.

Inventor： Yasuhiko Ishida

IPC: B29C45/60 ,  B29C45/18 ,  B29C45/00 ,  B29C45/47

CPC classification number: B29C45/60 ,  B29C45/1808 ,  B29C45/0001 ,  B29C45/1816 ,  B29C45/47 ,  B29C2045/1875 ,  B29K2505/10

Abstract: An object is to manufacture molded bodies having a small variation among products even if the mixture amount of a metal powder is increased when molding is performed by directly introducing not only a metal powder but also a powdered resin into an injection molding machine.
In a metal powder mixed resin molded body manufacturing method for manufacturing a molded body by kneading a molding material including a metal powder, a thermoplastic resin powder, and an additive agent, molding is performed by an injection molding machine in which a molding screw is arranged. The molding screw of the injection molding machine includes a feeding portion, a compressing portion, and a metering portion that are continuously and integrally provided, the feeding portion and the compressing portion are constituted by an one-line spiral flight, the flight of the compressing portion includes a plurality of sub-flights that extend in a spiral manner in a screw axis direction and the sub-flights each have a polygonal shape with rounded corner portions, and the sub-flights are arranged such that the corner portions are shifted by a set angle in a circumferential direction about the screw axis, and the metering portion is provided with a plurality of blending/aligning portions each having gear-like protrusions and recesses in a circumferential direction about the screw axis.