Apparatus for extruding a thermoplastic material

Details Apparatus for extruding a thermoplastic material Apparatus for extruding a thermoplastic material

1979-04-23

1982-03-16

Weston, Caleb

Plastic article or earthenware shaping or treating: apparatus

Stock pressurizing means operably associated with downstream...

156500, 425378R, 425379R, B29F 302, B29F 308

Patent

active

043198716

ABSTRACT:
An apparatus for extruding a thermoplastic material comprising an extruder and wherein said extruder comprises a heat dam assembly including an inner thin walled sleeve fixed at one end to the exterior periphery of a barrel section and extending therefrom in closely spaced surrounding relation to a position adjacent a discharge end of a screw section and an annularly finned member disposed in closely spaced surrounding relation to a thin walled sleeve fixedly connected between the exterior periphery of the barrel section and a nozzle assembly.

REFERENCES:
patent: 2810168 (1957-10-01), Nyborg
patent: 2995159 (1961-08-01), Berggren
patent: 3001233 (1961-09-01), Ernst
patent: 3305893 (1967-02-01), Machen
patent: 3645659 (1972-02-01), Schott
patent: 3689184 (1972-09-01), Morse
patent: 3774811 (1973-11-01), Staerman
patent: 3797984 (1974-03-01), Yago et al.
patent: 3954366 (1976-05-01), Fields
patent: 4038013 (1977-07-01), Tomlinson

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