Apparatus for molding of plastic tubing

Details Apparatus for molding of plastic tubing Apparatus for molding of plastic tubing

1984-08-29

1985-10-08

Silbaugh, Jan

Plastic article or earthenware shaping or treating: apparatus

Shaping orifice and downstream work contacting gaseous...

264508, 425526, 425532, 4253261, B29C 1707, B29D 2304

Patent

active

045457514

ABSTRACT:
Method and apparatus for molding of plastic tubing, including an elongate nozzle receiving an extrudate of an expandible plastic material under pressure from an extrusion head and a coaxial mandrel with air supply and evacuating passages communicating with a vortex generation tube for cooling air before its introduction to the interior of the formed tubing for its blowing and conforming to the walls of a tubular mold cavity formed by a series of forwardly moving molds.

REFERENCES:
patent: 1952281 (1934-03-01), Ranque
patent: 3173273 (1965-03-01), Fulton
patent: 3208229 (1965-09-01), Fulton
patent: 3981663 (1976-09-01), Lupke

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