Transfer blow molding technique
US4054629A · kind A · utility
11Cited by
4References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 22, 1976 |
| Grant date | Oct 18, 1977 |
| Priority date | — |
| Expiry date | Jan 22, 1996 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2105/253
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Parisons are injection molded using a cooled cavity and a relatively hot core pin to prevent the formation of residual internal stress in or near the inner surface of the parison. The parison is promptly transferred while still hot from the injection mold to a temperature conditioning station to provide a desired temperature distribution and the temperature conditioned parison is highly molecularly biaxially oriented as it is blow molded.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.