Extruder head for extruding an outer tube or sheath about an inn

Details Extruder head for extruding an outer tube or sheath about an inn Extruder head for extruding an outer tube or sheath about an inn

1974-12-04

1976-11-30

Husar, Francis S.

Plastic article or earthenware shaping or treating: apparatus

Distinct means to feed, support or manipulate preform stock...

And means to form or reshape preform

156244, 264173, 425113, 4251331, 425380, B29F 310

Patent

active

039946444

ABSTRACT:
An improvement in an extruder head for extruding an outer tubular extrusion or sheath about an inner tube or cable which extrusion head has a means for passing an inner tube or cable through the extruder head which extruder head also terminates in a generally annular passage disposed about said inner tube or cable, the improvement residing in means for feeding molten material through an introducing passage at an angle to said extruder head and then into said annular passage, dividing means in said introducing passage for dividing said molten material into a stream of U-shaped cross-section, said dividing means including a leading parting edge; a method of producing a carrier ring which carries the dividing means by passing a machining tool into the introducing passage and passing the tool along paths having progressively larger U-shaped loops.

REFERENCES:
patent: 2766481 (1956-10-01), Henning
patent: 2893056 (1959-07-01), Henning
patent: 3737260 (1973-06-01), Kaye
patent: 3780154 (1973-12-01), Muller et al.
patent: 3833325 (1974-09-01), Ramsey
patent: 3856448 (1974-12-01), Iijima et al.
patent: 3860686 (1975-01-01), Myers

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