Method for operating an injection-moulding machine, in particular with respect to improved constant mould filling, and injection-moulding machine for carrying out the method

US11883986B2 · kind B2 · utility

Assignee

• Kraussmaffei Technologies GMBH · DE

Inventors

• Stefan Moser · Hallbergmoos, DE
• Nicolina Topic · Munich, DE
• Sina Greger · Munich, DE

Key dates

• Filing date: Sep 30, 2019
• Grant date: Jan 30, 2024
• Expiry date: Nov 30, 2040

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B29C2945/76969
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A method for operating an injection-molding machine, including the steps: a) in a current injection-molding cycle, after an accepted-part reference injection-molding cycle learned in a learning phase: detecting a compound pressure change k1 relative to an accepted-part reference compound pressure pmasse, ref during at least part of an injection phase of the current injection-molding cycle by measuring a current compound pressure pmasse, act and comparing the current compound pressure pmasse,act with the accepted-part reference compound pressure pmasse,ref, b) determining a target mold internal pressure curve pwkz,soll (t) for a holding-pressure phase of the current injection-molding cycle, wherein for this purpose a mold internal pressure curve pwkz,ref (t) of the accepted-part reference injection-molding cycle is adjusted at least in dependence on the compound pressure change k1 detected in step a), and c) traveling the holding-pressure curve pmasse, Hld, act (t) of the current injection-molding cycle in such a way that an actual mold internal pressure curve pwkz,act (t) of the current injection-molding cycle runs at least more closely along the target mold internal pressure curve…