Screw head device for injection molding machine

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

1997-08-29

1999-08-31

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

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

With means between charger and mold to cut off flow of...

425DIG224, B29C 4518

Patent

active

059451416

ABSTRACT:
A screw head device 1 for an injection molding machine includes a ring valve 3 set on a stem portion 2 of a screw head for movement in back and forth direction and for defining a rear side resin passage Rr between its own inner peripheral surface and the stem portion 2, a front side resin passage Rf extending axially and communicated with the rear side resin passage Rr, and a surge preventing mechanism, in which the front end of a screw main body Sm acts as a valve seat for mating with the rear end face of the ring valve 3. At a rear side of the head portion 4, a spacer guide 6 is provided. The outer peripheral surface 6s of the spacer guide 6 is located radially inside of the outer peripheral portion 4s of the head portions end racially outside of the bottom portion Rfd of the front side resin passage Rf. A front ring spacer 7 formed of a ceramic material, such as a boron alloy cermet, and having flat front and rear end faces 7f and 7r is set on the spacer guide 6 with mating the rear end face 7r with the ring valve 3. By this, the front ring spacer 7 is interposed between the 20 head portion 4 and the ring valve 3 to avoid wearing of the ring valve 3 by unevenness of the head portion.

REFERENCES:
patent: 5167971 (1992-12-01), Gill et al.
patent: 5401161 (1995-03-01), Long

Affiliated with

Also associated with

Rating

Screw head device 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 Screw head device for injection molding machine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Screw head device for injection molding machine will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2425977