Integrated vacuum forming/reaction injection molding apparatus for manufacturing a shaped polymeric laminate article
US5074770A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 30, 1989 |
| Grant date | Dec 24, 1991 |
| Priority date | — |
| Expiry date | Aug 30, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/769
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An apparatus is provided for the integrated vacuum forming/reaction injection molding of a shaped polymeric laminate article, e.g., an item of sanitary ware such as a bathtub or a motor vehicle body panel, possessing a vacuum formed thermoplastic resin cosmetic layer bonded to a thermoset resin backing layer. In a preferred embodiment, the exposed surface of a vacuum formed preform is treated within the cavity of a sealed reaction injection mold, e.g., by plasma or chemically reactive gas, to modify the polymeric structure of the resin at such surface without affecting the bulk properties of the resin and thereby improve the adherent property of the preform for the subsequently formed theremoset resin layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.