Extruder for replastifying thermoplastic strips, foils or webs

Details Extruder for replastifying thermoplastic strips, foils or webs Extruder for replastifying thermoplastic strips, foils or webs

1980-07-09

1986-01-07

Rosenbaum, Mark

Solid material comminution or disintegration

Apparatus

Cooperating comminuting surfaces

425208, B02C 1922

Patent

active

045629730

ABSTRACT:
A worm extruder for replastifying miscast plastic webs has a cylinder bore communicating with a receiving chamber at a feed opening, the chamber and the bore being provided with a plurality of longitudinal grooves for catching plastic strips wound about the extruder shaft upon feeding to the receiving chamber. Upon being snagged by the grooves, the strips are ground between a worm thread of the extruder shaft and a polished surface of the bore in which the catch grooves are disposed. The receiving chamber is asymmetrically formed with a peripheral sickle-shaped space extending in part into the cylinder bore toward a resin outlet, while the shaft is formed in the region of the chamber with a plurality of worm threads having equispaced notches.

REFERENCES:
patent: 3327348 (1967-06-01), Roehlig et al.
patent: 4013276 (1977-03-01), Boham et al.
patent: 4129386 (1978-12-01), Rauwendaal

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