Pellet forming extrusion apparatus
US6099288A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 20, 1998 |
| Grant date | Aug 8, 2000 |
| Priority date | — |
| Expiry date | Mar 20, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S425/23
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A pellet-forming apparatus is provided for extruding high moisture materials in a low-pressure extrusion apparatus having an extruding cylinder and a cooperative extruding rotor. The rotor extends axially through the elongated cylinder and is formed with multi-tier extruding surfaces that are configured and positioned to be radially spaced with respect to the interior surface of the cylinder and form a pressure zone to effect radial displacement of the material through passages formed in the cylinder wall and be extruded exteriorly of the cylinder. The rotor preferably consists of a series of configured plates arranged along a common axis to form a combined auger-shaped extruding rotor. A feed conveyor comprising a helical flight auger is provided in preceding axial relationship to the extruding cylinder for feeding of material into the cylinder without substantial pressure buildup.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.