Process for producing thermoplastic resin hollow molded article
US6146579A · kind A · utility
1Cited by
9References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 27, 1998 |
| Grant date | Nov 14, 2000 |
| Priority date | — |
| Expiry date | May 27, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2045/1731
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A hollow molded article having no sink marks on its surface and having an excellent appearance is produced by filling a mold cavity with a resin being in a molten state and then ejecting at least a part of the resin by sucking through a resin-ejection opening and introducing gas through a gas-introduction opening into the resin inside of which being in a negative pressure. According to this process, the use of a high-pressure gas is not required.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.