Extrusion die head and method of making the same

Details Extrusion die head and method of making the same Extrusion die head and method of making the same

B - Operations, Transporting

29

C

76/4, 18/735

B29C 47/30 (2006.01) B29C 47/14 (2006.01)

Patent

CA 1130524

GT-172? 0282? ABSTRACT OF THE DISCLOSURE A new extrusion die head and method of making the same is provided that permits two strips of elastomeric material to be extruded simultaneously and one above the other from a single core of extrudate. The head is particularly useful for extruding sidewall strips in the manufacture of pneumatic tires. The head design has features common to both conventional strip extruding heads and to heads for extruding tubular shapes, commonly called tuber heads. However, the head is quite different from both the conventional strip extrusion heads and the conventional tuber heads, and has the advantage that it permits two strips to be extruded simultaneously through passages that are relatively short in length and are no wider than the width of a single sidewall strip. The design of the head and the method of making it are such that the extrusion passage surfaces can be easily machined to provide excellent flow characteristics, and the entire head is easily fabricated and cleaned.

362332

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