APPARATUS AND METHOD FOR EXTRUDING RUBBER MIXTURES
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United States of America Patent
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Dec 27, 2018
app pub date -
Dec 21, 2016
filing date -
Dec 21, 2016
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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.
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