METHOD FOR OPERATING AN INJECTION-MOLDING MACHINE, IN PARTICULAR WITH RESPECT TO IMPROVED CONSTANT MOLD FILLING, AND INJECTION-MOLDING MACHINE FOR CARRYING OUT THE METHOD

摘要

The invention relates to a method for operating an injection-molding machine, comprising 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 p sb / _{masse, ref} sb / during at least part of an injection phase of the current injection-molding cycle by measuring a current compound pressure p_{masse, act} and comparing the current compound pressure p_masse,act sb / with the accepted-part reference compound pressure p_masse,ref, b) determining a target mold internal pressure curve p_wkz,soll(t) for a holding-pressure phase of the current injection-molding cycle, wherein for this purpose a mold internal pressure curve p_wkz,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 p_{masse, 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 p_wkz,soll (t) than a mold internal pressure curve p_wkz,ref (t) that is unchanged in comparison with the accepted-part reference cycle.