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US 2004/0166192 A1Published application
Tool for extruding a pipe-shaped melt strand
OwnerPeter Stommelinventor
Life of this patent
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Abstract
A tool for extruding a pipe-shaped melt strand of thermoplastic material, having a ring-shaped outlet nozzle and at least one melt conduit leading from an associated inlet opening to the outlet nozzle, which extends concentrically with respect to the center axis of the tool and into whose peripheral wall spirally turning helices are cut and form a helical manifold extending in the outlet direction of the melt strand. The helices are cut into the inner peripheral wall and into the outer peripheral wall of the at least one melt conduit.
Claims10
A tool for extruding a pipe-shaped melt strand of thermoplastic material, the tool comprising:
- a ring-shaped outlet nozzle (5) and at least one melt conduit leading (6.1, 6.2, 6.3) from an inlet opening (7.1, 7.2, 73) of the tool to the outlet nozzle (5) which extends concentrically with respect to a center axis (A) of the tool and are cut into a peripheral wall as spirally turning helices and form a helical manifold (8) extending in an outlet direction (E) of the melt strand, and the helices are cut into the inner peripheral wall (60) and into an outer peripheral wall (61) of the at least one melt conduit.
Dependencies are inferred from the claim text.