Method of blow molding and blow molding system
US5346665A · kind A · utility
4Cited by
6References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 6, 1991 |
| Grant date | Sep 13, 1994 |
| Priority date | — |
| Expiry date | Dec 6, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C49/425
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
When a resin article having at least one thickened part is blow-molded, a parison is extruded and suspended between halves of a blow mold the inner surface of which defines the outer shape of the article to be molded. An expander panel is inserted into the space inside the parison, and is moved toward the part of the inner surface of the blow mold corresponding to the thickened part of the article to press thereagainst a part of the parison. Then the blow mold is closed and pressurized gas is blown into the parison.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.