Plastic article or earthenware shaping or treating: apparatus – With separate and distinct upstream agitating or kneading means – Plural means being diverse – or parallel and intermeshing or...
Patent
1979-03-26
1981-02-10
Thurlow, Jeffery R.
Plastic article or earthenware shaping or treating: apparatus
With separate and distinct upstream agitating or kneading means
Plural means being diverse, or parallel and intermeshing or...
366 76, 366 79, 366150, 366156, 425205, 425207, 425208, 425209, 425376R, 425379R, B29F 302
Patent
active
042498775
ABSTRACT:
An extruder for thermoplastics having a directly motor-driven high-speed feed screw which mechanically force-feeds raw plastic pellets, pushing them forward under high pressure into a heat-transfer zone for melting, and finally through a static mixer, to deliver a pressurized homogeneous melt to an extrusion die. Melt pressurization results entirely from the mechanical force-feeding action of the screw rather than through the viscous shear action found in conventional screw extruders.
REFERENCES:
patent: 3305893 (1967-02-01), Machen
patent: 3817675 (1974-06-01), Maiocco
patent: 3860220 (1975-01-01), Matsubayashi et al.
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