Method for making plastic parts
US4923657A · kind A · utility
26Cited by
13References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 4, 1988 |
| Grant date | May 8, 1990 |
| Priority date | — |
| Expiry date | Aug 4, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60R13/0256
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A process for molding plastic parts includes the steps of providing two or more colors of pigmented powder particles of thermoplastic material; casting the particles against a heated surface to form non-patterned layers of particles with voids therebetween; heating the layers to form color blended fused fringe zones between the particles which fill the voids to form a solid, multi-colored, three-dimensional article while each particle retains its discrete particle core which maintains each particle's central or original color concentration and which cores have discernible light transmissive properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.