Method for molding parts
US5591384A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 31, 1994 |
| Grant date | Jan 7, 1997 |
| Priority date | — |
| Expiry date | Mar 31, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S264/921
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method is disclosed for molding parts. The system comprises a plasticator and press. The plasticator is capable of receiving a plurality of molding materials comprising a predetermined amount of at least thermoplastic polymers and long reinforcing fibers, such as glass fiber. The plasticator is characterized in that it is capable of simultaneously receiving contaminated molding materials and relatively long glass fibers and molding them into a billet wherein the fibers remain substantially undamaged. The billet is subsequently placed in a compression molding press where other materials may be molded or applied to its surface. The method is further characterized in that a single thermal rise is used to plasticate the molding materials. The system employed by the method comprises a plasticator having a screw, a screw drive system, a plurality of heaters and control system to control the pressure and temperature in a barrel of the plasticator so as to create a billet having certain predetermined billet characteristics (such as a desired volume and/or density).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.