Injection molding extrusion mixer
US4077756A · kind A · utility
7Cited by
6References
22Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 8, 1976 |
| Grant date | Mar 7, 1978 |
| Priority date | — |
| Expiry date | Sep 8, 1996 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2045/308
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Mixer apparatus for use with injection molding, extrusion or mixing and compounding machines wherein a melt chamber is lined with a series of stacked Belleville spring washers to provide a series of axially narrow, annular extrusion passages between the washers. A quantity of thermoplastic material is supplied to the melt chamber at the inner diameter of the washers and is therein subjected to pressure to cause extrusion of the material through the passages. From the washers, the material is directed through axially extending slots about the washers to a mold cavity or forming die.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.