Nozzle head for an extruder

Details Nozzle head for an extruder Nozzle head for an extruder

2008-06-03

2008-06-03

Davis, Robert B. (Department: 1791)

Plastic article or earthenware shaping or treating: apparatus

Means feeding fluent stock from plural sources to common...

Extrusion shaping means

C264S209200, C425S380000, C425S382300, C425S382400, C425S462000

Reexamination Certificate

active

07381042

ABSTRACT:
A die head for an extruder including an outer shell, an inner cylindrical mandrel, an annular die gap at a discharge side of the die head, at least one intake opening for receiving a melted mass, at least one distribution element for distributing the melted mass to a central ring channel terminating in the die gap, an inflow channel connecting the at least one intake opening to the at least one distribution element. Further, at least one of the distribution element and the inflow channel are formed such that the distribution element is set into torsional motion around a longitudinal axis of the mandrel due to an flow of the melted mass, and the flow of melted mass is routed to the central ring channel.

REFERENCES:
patent: 3099860 (1963-08-01), Schippers
patent: 4151242 (1979-04-01), Sansone
patent: 4395221 (1983-07-01), Herrington
patent: 4565510 (1986-01-01), Kirjavainen
patent: 4731216 (1988-03-01), Topolski
patent: 7131829 (2006-11-01), Nagai et al.
patent: 2007/0096358 (2007-05-01), Pelcz et al.
patent: 18 10 237 (1970-06-01), None
patent: 199 23 973 (2003-02-01), None
patent: 987 809 (1965-03-01), None

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