Method and apparatus for preparing thermoplastic resin foam

Details Method and apparatus for preparing thermoplastic resin foam Method and apparatus for preparing thermoplastic resin foam

1982-05-17

1984-06-12

Anderson, Philip E.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

By gas forming or expanding

264 50, 264DIG5, 264DIG13, 425 4C, 425207, 425209, 425817C, B29D 2700, B29F 302

Patent

active

044540876

ABSTRACT:
A method and apparatus for preparing a substantially uniform thermoplastic foam extruded from an extruder, the molten thermoplastic resin having uniformly distributed therein a foaming agent. A cooling-mixer continuously receives the extruded mass of resin and foaming agent from the extruder and intimately mixes and substantially cools the mass. A substantially adiabatic zigzag mixer is connected to the cooling-mixer and divides the mass into a plurality of separate streams which are at least partially separated and recombined. A die is connected to the zigzag mixer and extrudes the uniformly cooled mass into a lower pressure zone to produce a substantially uniform thermoplastic foam.

REFERENCES:
patent: 2669751 (1954-02-01), McCurdy et al.
patent: 3316335 (1967-04-01), Snella et al.
patent: 3588955 (1971-06-01), Azuma
patent: 3751377 (1973-08-01), Buckner
patent: 3817669 (1974-06-01), Buckner
patent: 3827841 (1974-08-01), Kawai et al.
patent: 4201480 (1980-05-01), Brand
patent: 4222729 (1980-09-01), Ragazzini et al.
patent: 4302409 (1981-11-01), Miller et al.
patent: 4362482 (1982-12-01), Rutledge

Affiliated with

Also associated with

Rating

Method and apparatus for preparing thermoplastic resin foam 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 and apparatus for preparing thermoplastic resin foam, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for preparing thermoplastic resin foam will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-120887