Patent ID: 11883986
Assignee: KRAUSSMAFFEI TECHNOLOGIES
Field: Other special machines (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. Method for operating an injection-moulding machine comprising the steps:
a) in a current injection-moulding cycle, after an accepted-part reference injection-moulding cycle learned in a learning phase: detecting a compound pressure change k1 with respect to an accepted-part reference compound pressure pmasse,ref during at least a part of an injection phase of the current injection-moulding 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 mould internal pressure curve pwkz,soll(t) for a holding-pressure phase of the current injection-moulding cycle, wherein for this purpose a mould internal pressure curve pwkz,ref(t) of the accepted-part reference injection-moulding cycle is adjusted at least depending on the compound pressure change k1 detected in step a) and
c) travelling the holding-pressure curve pmasse,Hld,act(t) of the current injection-moulding cycle in such a manner that an actual mould internal pressure curve pwkz,act(t) of the current injection-moulding cycle runs at least more closely along the target mould internal pressure curve pwkz,soll(t) than a mould internal pressure curve pwkz,ref(t) that is unchanged with respect to the accepted-part reference cycle.