Method of injection molding a foamed plastic article using a rel

Details Method of injection molding a foamed plastic article using a rel Method of injection molding a foamed plastic article using a rel

1987-06-15

1988-11-08

Anderson, Philip

Plastic and nonmetallic article shaping or treating: processes

With measuring, testing, or inspecting

Controlling heat transfer with molding material

264 50, 2643287, 264DIG5, 264DIG13, 264DIG83, 425 4R, 425144, 425149, C08J 930, B29C 4556, B29C 4578, B29C 4580

Patent

active

047832924

ABSTRACT:
A method of forming a foamed plastic article, comprising the steps of: injecting pressurized gaseous bubbles into a stream of heated liquid plastic; feeding the heated liquid, with entrained gas bubbles, into a mold cavity without expanding the bubbles; slowly expanding the mold cavity to permit the gas bubbles to expand and thereby produce a foamed plastic article; controlling the temperature of the mold cavity surfaces so that the plastic material is in a viscous liquid state during at least the major part of the bubble expansion process; and cooling the mold cavity surfaces to a temperature less than the melt point of the plastic.

REFERENCES:
patent: 4092385 (1978-05-01), Balevski et al.
patent: 4096218 (1978-06-01), Yasuike et al.
patent: 4129635 (1978-12-01), Yasuike et al.

Affiliated with

Also associated with

Rating

Method of injection molding a foamed plastic article using a rel does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of injection molding a foamed plastic article using a rel, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of injection molding a foamed plastic article using a rel will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-462968