Injection molding of transparent plastic with glitter
US5976446A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 24, 1998 |
| Grant date | Nov 2, 1999 |
| Priority date | — |
| Expiry date | Mar 24, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C45/0013
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A process for making a clear plastic consumer product having an even distribution of glitter particles throughout its volume, start by forming a dry mixture of particles of the plastic and the glitter particles. The glitter particles are uniformly mixed with the particles of plastic in the mixture. The mixture is supplied to a hopper of an injection molding machine and then passed from the hopper to a heated cylinder of the injection molding machine to heat and melt the mixture to form an injectable mass. The injectable mass is injected into a mold cavity having the shape of the consumer product and allowed to cool and harden into the consumer product in the mold cavity. The process ended by opening the mold cavity to remove the consumer product from the mold cavity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.