公开(公告)号：US20240157617A1

公开(公告)日：2024-05-16

申请号：US18482882

申请日：2023-10-08

Applicant: SUMITOMO HEAVY INDUSTRIES, LTD.

Inventor： Takuya MATSUNAGA ,  Keisuke TOMIMATSU ,  Katsuki FUJITA ,  Shun SHIBUYA ,  Xiangyu CHU

IPC: B29C45/76 ,  B29C45/17

CPC classification number: B29C45/7653 ,  B29C45/1774 ,  B29C2945/7601 ,  B29C2945/76501 ,  B29C2945/76709 ,  B29C2945/76862

Abstract: A control device includes: an injection control unit that controls, in a pressure holding process of controlling a pressure acting on a molding material from an injection member, an injection drive source based on a set value of the pressure and an actual value of the pressure. The injection control unit performs pressure reduction control to gradually reduce the actual value of the pressure with respect to the set value of the pressure from a middle of a k-th stage (k is an integer of 1 or more and n or less). The control device includes a ratio setting unit that sets a time ratio Tr(k) in the k-th stage and a pressure ratio ΔPr(k) in the k-th stage based on a set value P(k) of the pressure in the k-th stage, a set value T(k) of a holding time in the k-th stage, and information stored in advance.