Screw for in-line screw type thermosetting resin injection moldi

Details Screw for in-line screw type thermosetting resin injection moldi Screw for in-line screw type thermosetting resin injection moldi

1996-06-27

1999-09-28

Cooley, Charles E.

Agitating

Rubber or heavy plastic working

Rotating and reciprocating stirrer

366 81, 366 88, 425209, B29B 714

Patent

active

059575760

ABSTRACT:
A screw for an in-line screw type thermosetting resin injection molding machine comprises a resin kneading portion in a front end portion of a full-flighted screw. In the resin kneading portion, a groove having a crest portion and a trough portion formed spirally in a circumferential direction, and a step portion. A difference between a radial dimension of the step portion and an outermost radial dimension of the crest portion is 10% to 60% of a difference between the outermost radial dimension of the crest portion and an innermost radial dimension of the trough portion. The axial length of the resin kneading portion is 0.5 to 2 times as long as the outer diameter of the full-flighted screw, or 0.5 to 2 times as long as the pitch of the full-flighted screw.

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