Extruder head with a rotary die and process for lubricating this head
US4806086A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 13, 1987 |
| Grant date | Feb 21, 1989 |
| Priority date | — |
| Expiry date | Feb 13, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C48/06
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The present invention relates to an extruder head with a rotary die which requires no ball or roller bearings. A die and a mandrel rod consisting of a cable guide are fixed in a cylindrical axial bore of an intermediate rotary sleeve driven by a driving mechanism. The sleeve has a substantially cylindrical outer surface which slidingly revolves in the axial bore of a distributing cartridge. The gliding surfaces are lubrified by the hot synthetic material. A clamping nut axially maintains the intermediate sleeve and allows the leakage flow of the synthetic material to be controlled. Such an extruder head may be utilized for the fabrication of helicoidal elements of synthetic material, especially helicoidal rods for optical fibers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.