Method for detecting thermodynamic phase transitions during polymer injection molding
US5384079A · kind A · utility
16Cited by
10References
11Claims
0Family size
Assignee
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Key dates
| Filing date | Jan 6, 1993 |
| Grant date | Jan 24, 1995 |
| Priority date | — |
| Expiry date | Jan 6, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C45/76
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method is provided for measuring the onset of polymer solidification, i phase transitions from liquid to crystal or liquid to glass, during injection molding to detect characteristic fluorescence radiation from a dye which has been doped into the polymer at very low concentration. The method involves the use of a calibration relationship between the fluorescence intensity and temperature of the doped polymer in order to determine distinct features which characterize the onset of solidification.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.