Method of predicting optimal injection molding cycle time
US6572796B1 · kind B1 · utility
5Cited by
5References
14Claims
0Family size
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Key dates
| Filing date | Oct 27, 2000 |
| Grant date | Jun 3, 2003 |
| Priority date | — |
| Expiry date | Jun 14, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2995/0049
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method of predicting optimal injection molding cycle time includes the steps of performing a thermal analysis through a thickness of a part made using an injection mold, calculating shrinkage as a function of cooling time, calculating friction forces between the part and mold, calculating ejection forces based on the coefficient of friction and the calculated shrinkage calculating the induced stress in selected high stress areas on the part, and comparing the induced stress with material yield stress to determine an optimal cycle time window within which the part can be ejected without being damaged.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.