公开(公告)号：US20230219270A1

公开(公告)日：2023-07-13

申请号：US17996173

申请日：2021-04-14

申请人： Daiichi Seikosha Co., Ltd.

发明人： Yasuhiko Ishida

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

CPC分类号： B29C45/60 ,  B29C45/1808 ,  B29C45/0001 ,  B29C45/1816 ,  B29C45/47 ,  B29C2045/1875 ,  B29K2505/10

摘要： 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.