Process for making sound insulation components
US4098629A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 26, 1977 |
| Grant date | Jul 4, 1978 |
| Priority date | — |
| Expiry date | May 26, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24479
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A process for making composite contoured sound insulating panels of a type suitable for use adjacent to structural panels of automobile vehicle bodies, which in accordance with one embodiment of the present invention, comprises forming a fibrous pad incorporating controlled amounts of heat curable thermosetting binder and a heat softenable thermoplastic binder distributed in a controlled manner therethrough. The pad is subjected to a preliminary curing step to bond the fibers together into an integral mass, whereafter a dense liquid vinyl plastisol coating is applied to at least one face surface of the pad, which thereafter is heated to effect a fusion of the coating into a heat softened integral layer, effecting a simultaneous heat softening of the thermoplastic binder, whereafter the heated pad is placed between appropriately contoured mold surfaces and is compressed to impart a preselected contour thereto and localized embossments therein and a desired surface finish to the plastisol layer, while simultaneously cooling the pad to effect a rigidification of the thermoplastic binder and the layer so as to retain the composite pad in the preselected contoured and embossed configura…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.