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

1980-02-15

1981-08-25

Thurlow, Jeffery R.

Plastic article or earthenware shaping or treating: apparatus

With apparatus assembly or dismantling means or with idle part

For extrusion or injection type shaping means

29412, 29416, 29425, 29DIG26, 15624415, 15624425, 264177R, 425380, 425464, 425467, B29F 304

Patent

active

042856515

ABSTRACT:
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.

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patent: 2468585 (1949-04-01), Bluma
patent: 3046602 (1962-07-01), Houvener
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patent: 3407441 (1968-10-01), Vigansky et al.
patent: 3815199 (1974-06-01), Malavazos
patent: 4189293 (1980-02-01), Ether

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