Injection molding machine control system

JP7872401B2Active Publication Date: 2026-06-09SUMITOMO HEAVY IND LTD
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
SUMITOMO HEAVY IND LTD
Filing Date
2025-03-27
Publication Date
2026-06-09

AI Technical Summary

Benefits of technology

【0011】 本発明の一態様によれば、保圧工程において射出部材の後退中に射出部材の位置が停止位置に近づくと、射出部材の後退速度をより小さい速度に制限する。これにより、仮に射出部材が後退限位置まで後退させられても、そのときの射出部材の後退速度が小さく、衝撃が小さい。従って、衝撃を低減できる。

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Abstract

To provide a technique to reduce the impact caused by the injection member being retracted during the pressure holding process.SOLUTION: A control device of an injection molding machine is equipped with an injection member provided inside a cylinder that heats molding material, and an injection drive source that causes the injection member to move forward to fill the molding material into a mold device. The control device has a limiting portion that limits the retraction speed of the injection member in the pressure holding process that controls the filling pressure acting on the molding material from the injection member. The limiting portion limits the retraction speed of the injection member to a smaller speed when the position of the injection member approaches a stop position during the retraction of the injection member in the pressure holding process.SELECTED DRAWING: Figure 7
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Claims

1. A control device for an injection molding machine comprising: an injection member provided inside a cylinder for heating a molding material; and an injection drive source for moving the injection member forward to fill the molding material inside a mold device, In a holding pressure process in which the injection drive source is controlled based on the actual value and set value of the filling pressure acting on the molding material from the injection member, the limiting unit has a limiting unit that limits the retraction speed of the injection member. The limiting unit is a control device for an injection molding machine that, during the holding pressure process, limits the retraction speed of the injection member to a smaller speed when the position of the injection member approaches the stop position while the injection member is retracting.

2. A control device for an injection molding machine comprising: an injection member provided inside a cylinder for heating a molding material; and an injection drive source for moving the injection member forward to fill the molding material inside a mold device, In a holding pressure process in which the injection drive source is controlled based on the actual value and set value of the filling pressure acting on the molding material from the injection member, the limiting unit has a limiting unit that limits the retraction speed of the injection member. The limiting unit is a control device for an injection molding machine that, during the holding pressure process, limits the retraction speed of the injection member based on a limiting value when the position of the injection member approaches the stop position while the injection member is retracting.