Multiscrew extruder device with heat exchange structure
US8967850B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 8, 2008 |
| Grant date | Mar 3, 2015 |
| Priority date | — |
| Expiry date | Jul 2, 2031 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C48/12
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A multiscrew extruder device for production of elastomeric compounds is intended for manufacturing tires for vehicle wheels. The device includes a holding body; a mandrel inserted in the holding body extending along a longitudinal axis and delimiting an annular chamber with the holding body; and a plurality of extrusion screws disposed in the annular chamber and parallel to the longitudinal axis. A first circuit for a heat-exchange fluid for temperature control is formed in the mandrel and includes a central channel extending in the mandrel along the longitudinal axis and a plurality of parallel peripheral channels extending in a peripheral portion of the mandrel close to the annular chamber and in fluid communication with the central channel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.