Method of fabricating a slush mold and skin made therefrom
US4937030A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 2, 1989 |
| Grant date | Jun 26, 1990 |
| Priority date | — |
| Expiry date | Aug 2, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C41/18
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method of forming a slush mold and a synthetic resin skin utilizing the slush mold. The method includes the steps of roughing a foamed synthetic resin surface to define a prototype having a plurality of irregularly spaced and irregularly sized recesses, forming a metal mold to have a molding surface accurately complementary to the prototype surface and molding a skin of synthetic resin against the molding surface of the metal mold. The recesses preferably have a cross section dimension in the range of approximately 170 to 500 microns and a depth in the range of approximately 8 to 133 microns. Narrower preferred ranges are disclosed. The surface preferably has a regular unbiased variance of less than approximately 300 microns and preferably less than 200 microns.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.