B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
18/735
B29C 47/20 (2006.01) B29C 47/02 (2006.01)
Patent
CA 1062862
ABSTRACT OF THE DISCLOSURE An extrusion head for extruding a plastomeric or elastomeric material on at least two filaments having a diameter of the order of 0.1 mm. and having a high modulus of elasticity while maintaining a constant spacing between the filaments and a process for such extrusion. The head comprises a mandrel with a cylindrical portion and a frusto-conical portion, the mandrel having grooves equal in number to the number of filaments extending along the surfaces of both portions for guiding the filaments. The frusto-conical portion has channels between the grooves for feeding the material between the filaments. A die with an opening having parallel walls for guiding the filaments and having a conical surface spaced from the frusto-conical portion is mounted adjacent the latter to provide a space for flow of the material. A further element adjacent the die may be used to extrude further material over the filaments embedded in the material extruded therebetween.
242146
Brovedan Antonio
Ferrentino Antonio
Sala Angelo
Industrie Pirelli Societa Per Azioni
Na
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