Continuous extrusion
US5782120A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 8, 1996 |
| Grant date | Jul 21, 1998 |
| Priority date | — |
| Expiry date | Aug 8, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21C23/009
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A continuous extrusion machine has a rotatable wheel with a continuous groove in a wall. A fixed shoe structure associated with the wheel provides a passageway and an abutment on the shoe structure closes off one end of the passageway. An extrusion die leads from the passageway at or adjacent the abutment. The entire wheel is located within a hood which is sealed except for apertures for the feedstock, the extruded product and the flash which is removed from the groove. A gaseous, non-oxidizing atmosphere is provided in the hood at a pressure greater than the atmosphere outside the hood. This prevents oxide and other contaminants from entering into the extruded product.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.