Valve assembly for injection molding machine

Details Valve assembly for injection molding machine Valve assembly for injection molding machine

1989-09-07

1991-01-29

Hoag, Willard E.

Plastic article or earthenware shaping or treating: apparatus

Female mold and charger to supply fluent stock under...

With accumulator, trap chamber, or serially arranged valves...

366 77, B29C 4560

Patent

active

049882813

ABSTRACT:
The improved check valve assembly includes a cylindrical barrel, a rotating and reciprocating plasticizing feed screw in said barrel, a screw tip or head portion downstream of the feed screw and connected thereto with the feed screw feeding heated thermoplastic material to the screw tip which in turn feeds the material externally of the screw tip, a check valve assembly between the feed screw and the screw tip including a sliding ring inside the barrel, a first sealing surface of the ring sealable against the feed screw operative to block communication between the feed screw and screw tip, and means operative to seal the ring against the feed screw upon rotation of the feed screw.

REFERENCES:
patent: 3099861 (1963-08-01), Gaspar et al.
patent: 3335461 (1967-08-01), Schwartz
patent: 3374502 (1968-03-01), Lazzara
patent: 3945784 (1976-03-01), Collins
patent: 4477242 (1984-10-01), Eichlseder
patent: 4530605 (1985-07-01), Eichlseder et al.

Affiliated with

Also associated with

Rating

Valve assembly for injection molding machine does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Valve assembly for injection molding machine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Valve assembly for injection molding machine will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-810747