Reuseable mold for forming a hollow aggregate filled thermoset article
US5240223A · kind A · utility
3Cited by
12References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 31, 1991 |
| Grant date | Aug 31, 1993 |
| Priority date | — |
| Expiry date | Dec 31, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2823/06
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The present invention is directed to a reuseable mold for casting a hollow form made of an aggregate filled thermosetting resin. The reuseable mold includes an outer mold, made from sheets of thermoplastic resin, and an inner mold, also made from sheets of thermoplastic resin, having a base with plugable opening(s) for connecting an air supply for popping the inner mold from the cast hollow form fabricated in the reuseable mold. The sheets are preferably 1" sheets of polyethylene.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.