Method for the forming of plastics

Details Method for the forming of plastics Method for the forming of plastics

1981-02-20

1983-06-14

Thurlow, Jeffery R.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

Shaping by extrusion

264349, 366 78, 366 81, 366 90, 425208, 425379R, B29B 106, B29B 302

Patent

active

043882625

ABSTRACT:
Method for the forming of thermoplastic and/or elastomeric resins, in which method use is made of a melt torpedo in the melting zone of a processing machine having a screw. The torpedo has grooves and ridges with a helix angle of preferably between 55.degree. and 75.degree.. The final melt temperature, that is the temperature at the beginning of the outlet of the processing machine is chosen lower than that applied in the same processing machine without a torpedo.

REFERENCES:
patent: 2653915 (1953-09-01), Elgin et al.
patent: 3584340 (1971-06-01), Koch
patent: 3728053 (1973-04-01), Stillhard et al.
patent: 3788612 (1974-01-01), Dray
patent: 3878285 (1975-04-01), Souffie
patent: 3957256 (1976-05-01), Murakami
patent: 3989434 (1976-11-01), Mercer
patent: 4106113 (1978-08-01), Laimer et al.
patent: 4134688 (1979-01-01), Horie et al.
patent: 4218146 (1980-08-01), Housz

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