Continuous extrusion apparatus
US6619093B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 4, 2002 |
| Grant date | Sep 16, 2003 |
| Priority date | — |
| Expiry date | Mar 4, 2022 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21C23/005
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Continuous extrusion apparatus for the production of copper tubing having a rotatable wheel formed with a plurality of circumferential grooves registering with (as shown in FIG. 1) abutments 4 formed on a die top 2. Respective exit apertures 6 each have a cross-sectional area of between two and five times the radial cross-section of the associated groove and lead to a passage 8 smoothly diverging to connect into an extrusion die chamber 10 housing an annular extrusion die (not shown). The appartus produces an extrudate in the form of a continuous, seamless, copper tube having a mass in excess of 500 kilograms extruded at a temperature of approximately 750 degrees Celsius.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.