Method for reproducing injection molded parts of quality and injection molding unit for performing the method
US10836088B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 24, 2018 |
| Grant date | Nov 17, 2020 |
| Priority date | — |
| Expiry date | Jul 20, 2039 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2945/76943
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A time variation of an internal pressure of the molding cavity of a multi-phase injection molding machine is detected and represented as an internal pressure graph. An internal pressure graph recorded during a production cycle that produced an injection molded part satisfying a predefined quality characteristic is used as a reference graph. If the internal pressure graph of the current production cycle exceeds a predefined threshold value, then a current machine parameter is changed so as to adapt an internal pressure graph of a subsequent production cycle to the reference graph. Each phase of the production cycle is assigned its own machine parameter determined to have a significant impact on the quality of the parts produced. The assigned machine parameters are changed in a predefined order in a plurality of production cycles wherein exactly one assigned machine parameter is changed per production cycle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.