Method for removing a part made of a material having a glass-transition temperature from a mold
US9505055B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jun 1, 2012 |
| Grant date | Nov 29, 2016 |
| Priority date | — |
| Expiry date | Sep 17, 2032 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22D30/00
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method for removing a part from a mold and to a machine for molding the part, the part made of a material having a glass-transition temperature and a melting temperature that is higher than the glass-transition temperature, and which is shaped in the cavity of a mold, includes at least two mold portions defining the shaping cavity therebetween. The mold is at a temperature between the glass-transition temperature and the melting temperature. The method includes opening the mold by spacing apart the mold portions, locally spraying a cooling gas toward the part remaining in a portion of the mold using at least one nozzle, and, after a predetermined time period following the start of spraying the gas, ejecting the part from the portion of the mold, the time period being such that the part reaches a temperature that is lower than the glass-transition temperature thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.