US 11,883,986 B2
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
Stefan Moser, Hallbergmoos (DE); Nicolina Topic, Munich (DE); and Sina Greger, Munich (DE)
Assigned to KRAUSSMAFFEI TECHNOLOGIES, Munich (DE)
Appl. No. 17/282,923
Filed by KRAUSSMAFFEI TECHNOLOGIES, Munich (DE)
PCT Filed Sep. 30, 2019, PCT No. PCT/EP2019/076368
§ 371(c)(1), (2) Date Apr. 5, 2021,
PCT Pub. No. WO2020/083611, PCT Pub. Date Apr. 30, 2020.
Claims priority of application No. 10 2018 126 313.9 (DE), filed on Oct. 23, 2018.
Prior Publication US 2021/0387392 A1, Dec. 16, 2021
Int. Cl. B29C 45/77 (2006.01); B29C 45/76 (2006.01)
CPC B29C 45/77 (2013.01) [B29C 45/762 (2013.01); B29C 2945/76006 (2013.01); B29C 2945/76404 (2013.01); B29C 2945/76498 (2013.01); B29C 2945/76882 (2013.01); B29C 2945/76949 (2013.01)] 18 Claims
OG exemplary drawing
 
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.