B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
18/746
B29C 47/06 (2006.01) B29C 47/04 (2006.01) B29C 47/14 (2006.01)
Patent
CA 1224313
TITLE OF THE INVENTION: EXTRUDER HEAD FOR PRODUCING FLAT COHESIVE PROFILED WEBS FROM RESILIENT MIXTURES OF DIFFERING COMPOSITION ABSTRACT OF THE DISCLOSURE: An extruder head for producing flat cohesive profiled strips from resilient mixtures of differing composition, such as mixtures of rubber or synthetic material, and especially for manufacturing uncured tread strips for pneumatic tires having a two-ply central portion and two similar edge portions. The extruder head includes two extruders which are dis- posed at an acute angle next to or above one another, and feed a common extrusion nozzle via a preform having flow channels which extend one above the other. The extruder head also has a third extruder which conveys the mixture for the edge portions and is connected to the preform at a greater angle than are the aforemen- tioned extruders. The flow route of the third extruder in the preform, starting from its connecting bore, is initially guided as a single connecting channel to a direction-changing angle piece in the central region above or below the flow channels associated with the other two extruders, and from there is split into two branch channels which span the connecting channels, are essentially of equal length, and in their edge regions end in edge channels which lead into the edge portions of the profiled strip.
458554
de Vries Gerhard
Schluter Hartwig
Sievers Willi
Continental Gummi-Werke Aktiengesellschaft
Fetherstonhaugh & Co.
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