公开(公告)号：US20240157618A1

公开(公告)日：2024-05-16

申请号：US18550436

申请日：2022-02-24

Applicant: Shibaura Machine Co., Ltd.

Inventor： Nobuyuki ASANUMA

IPC: B29C45/77

CPC classification number: B29C45/77 ,  B29C2945/76006 ,  B29C2945/76187 ,  B29C2945/76381 ,  B29C2945/76605 ,  B29C2945/76665 ,  B29C2945/76859

Abstract: A control method for an injection molding machine including a measurement process of measuring molten resin by moving a screw backward while rotating the screw in a heating barrel for melting a resin material, a rotational speed of the screw is reduced from a timing when a backward movement speed of the screw is reduced at the measurement process before the measurement process is completed, for stopping backward movement of the screw when the measurement process is completed, and the rotational speed and a rotation direction of the screw are controlled such that a back pressure as a pressure of the molten resin measured at the measurement process becomes a target pressure lower than the back pressure of when the measurement process is completed, when a target time comes.

公开(公告)号：US20240165860A1

公开(公告)日：2024-05-23

申请号：US18550442

申请日：2022-02-24

Applicant: Shibaura Machine Co., Ltd.

Inventor： Nobuyuki ASANUMA

IPC: B29C44/42 ,  B29C44/02 ,  B29C44/34 ,  B29C44/60 ,  B29C45/23 ,  B29C45/47 ,  B29K105/04

CPC classification number: B29C44/422 ,  B29C44/02 ,  B29C44/3442 ,  B29C44/425 ,  B29C44/60 ,  B29C45/23 ,  B29C45/47 ,  B29C2945/76545 ,  B29C2945/76665 ,  B29C2945/76688 ,  B29K2105/04

Abstract: A foam molding method includes: moving a screw backward to take air into a heating barrel through a nozzle part in a state in which a shut-off nozzle is opened, the shut-off nozzle that opens or closes the nozzle part for injecting the molten resin and is disposed on a heating barrel; closing the shut-off nozzle and moving the screw forward, to diffuse the air taken into the heating barrel, in the molten resin in the heating barrel; feeding the molten resin forward while dispersing the air as the air bubbles in the molten resin by moving the screw backward while rotating it in a state in which the shut-off nozzle is closed; and opening the shut-off nozzle, to inject the molten resin containing the dispersed air bubbles into the cavity.