Method for extruding a polymeric material
US8585949B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 27, 2005 |
| Grant date | Nov 19, 2013 |
| Priority date | — |
| Expiry date | Sep 15, 2026 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2030/003
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method for extruding a polymeric material includes the steps of: a) feeding the polymeric material to an extrusion apparatus including an extrusion head, the extrusion head including: a male die; a female die coaxially arranged with respect to the male die; a conveying channel, at least one portion of which is defined between the male die and the female die; and b) adjusting a cross-sectional area of the at least one portion of the conveying channel by reciprocally displacing the female die with respect to the male die in response to an extrusion speed variation of the polymeric material. An extrusion apparatus and a process for manufacturing a tire which uses the extrusion apparatus, are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.