Continuous extrusion apparatus
US5152163A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 28, 1991 |
| Grant date | Oct 6, 1992 |
| Priority date | — |
| Expiry date | Jan 28, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21C33/006
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Apparatus for the continuous extrusion of metals in which feed is introduced into two (or more) speed apart circumferential grooves in a rotating wheel (or rotating wheels) to contact an arcuate shoe portion and abutments extending into the grooves. The feed is constrained by the abutments to flow through frusto-conical exit apertures of cone angles in the range of 5.degree.-45.degree. in the shoe portion to a chamber which may also be of the divergent frusto-conical form, and is extruded as relatively thin-walled, large-cross-section products. Mixer plates are profiled to distribute flow evenly from the apertures to around the die opening. An extrusion die body for cylindrical extrusions is located and axially centered by set screws. Where an even number of grooves are utilized, an extrusion mandrel may be secured to the shoe portion by a bolt positioned centrally of the grooves and having a passage for injection of lubricant or oxidation inhibiting fluids. Since the volume feed rate is enhanced and the distance travelled by the material from the grooves is reduced, friction losses and the likelihood of discontinuities arising in extrudate products of relatively large hollow cross…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.