Process for producing a complex elastic molded structure of the sandwich type
US5230844A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 17, 1990 |
| Grant date | Jul 27, 1993 |
| Priority date | — |
| Expiry date | Jul 17, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2105/243
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Improved process for producing a complex elastic molded structure of the sandwich type, consisting of a core of polyurethane foam (10) surrounded by a skin, of which at least a part is reinforced with a reinforcing textile sheet (5, 6) impregnated with a thermosetting resin adhering to said foam, which process consists in: PA1 firstly depositing on one of the faces (4) of a mold intended to be closed by a cover (2) an assembly comprising a stiffening element (12) and a semirigid reinforcing textile sheet (6), preimpregnated with a solventless, non-tacky epoxy resin, PA1 then closing the cover (2) of the mold (1) so as to define, together with said assembly, a volume corresponding to the volume of the core which is to be formed; PA1 then injecting into the volume thus defined the reactional mixture forming the polyurethane foam, PA1 and finally allowing the product to cool and opening the mold (1) to withdraw the resulting elastic complex molded structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.