Screw head for injection molding machine

Details Screw head for injection molding machine Screw head for injection molding machine

1995-02-24

1996-03-26

Cooley, Charles E.

Agitating

Rubber or heavy plastic working

Rotating and reciprocating stirrer

366 81, 425190, B29C 4517

Patent

active

055015190

ABSTRACT:
A screw head for an injection molding machine is mounted to a distal end portion of a screw, and includes a trunk portion and a screw portion, and an undercut portion formed between the trunk portion and the screw portion, wherein a relationship between a shaft diameter e of the undercut portion and a nominal diameter f of the screw portion is defined as:

REFERENCES:
patent: 4065108 (1977-12-01), Olmsted
patent: 4105147 (1978-08-01), Stubbe
patent: 4377180 (1983-03-01), Biljes
patent: 4477242 (1984-10-01), Eichlseder et al.
patent: 5178458 (1993-01-01), Hsu
patent: 5240398 (1993-08-01), Akaguma et al.
"Stress concentration" Masataka Nishida published on Sep. 5, 1967, pp. 136, 137, 674, 675, 676, 677.

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