Worm extruder for synthetic resin

Details Worm extruder for synthetic resin Worm extruder for synthetic resin

1985-12-10

1987-04-21

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

Distinct means to feed, support or manipulate preform stock...

Extrusion shaping means

2641761, 264349, 366 89, 366323, 4251311, 425190, 425208, B29C 4700

Patent

active

046593004

ABSTRACT:
A synthetic resin worm press in which the thread height in an intake zone adjoining a feed opening zone is substantially smaller than the thread height in the feed opening zone, a frustoconical divergent transition piece is provided between the two zones at the core of the worm and longitudinal grooves are formed in the wall of the bore along these zones and are of progressively decreasing depth in the flow direction of the material.

REFERENCES:
patent: 3198142 (1965-08-01), Lothes
patent: 3647329 (1972-03-01), Reifenhauser et al.
patent: 3850415 (1974-11-01), Hansen
patent: 3910316 (1975-10-01), Reifenhauser
patent: 4227870 (1980-10-01), Kim
patent: 4308998 (1982-01-01), Wood

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