Apparatus and method for extruding rubber mixtures
US11279060B2 · kind B2 · utility
0Cited by
4References
11Claims
0Family size
Assignee
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Key dates
| Filing date | Dec 21, 2016 |
| Grant date | Mar 22, 2022 |
| Priority date | — |
| Expiry date | Dec 21, 2036 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2948/92885
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An extrusion apparatus intended for the manufacture of a coextruded profiled element P for tyres, produced from rubber compounds of various compositions, comprises a profiling device (30) arranged at the outlet of at least two flow channels (34, 35) for rubbery compounds of different composition. The said channels receive the compounds from positive-displacement contrarotating twin-screw extruders (10, 20), the screw flights interpenetrating and having conjugated profiles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.