Method for extending thermoplastic foams having smooth external

Details Method for extending thermoplastic foams having smooth external Method for extending thermoplastic foams having smooth external

1976-04-09

1977-09-20

Anderson, Philip

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

264 459, 264209, 264237, 264DIG14, 425 72R, 425817C, B29D 724, B29D 2700

Patent

active

040497682

ABSTRACT:
A method and apparatus are provided for employment in thermoplastic foam extrusion utilizing a direct-injection extrusion process. Thermoplastic foam material is produced which is characterized by having relatively smooth external skin surfaces, and an internal cellular structure, by providing intensive cooling of the foam material immediately upon its issuance from an extrusion die orifice. Means are also provided for controlling the cooling rate utilizing an adjustable device which controls the rate of cooling air flow and air temperature within the extended foam tube.

REFERENCES:
patent: 2461630 (1949-02-01), Cozzo
patent: 2668323 (1954-02-01), Johnson
patent: 3088167 (1963-05-01), Corbett
patent: 3413387 (1968-11-01), Ohsol
patent: 3426113 (1969-02-01), Yazawa
patent: 3560600 (1971-02-01), Gliniecki
patent: 3835209 (1974-09-01), Karabedian
patent: 3871802 (1975-03-01), Blackwelder
patent: 3976411 (1976-08-01), Rahlfs et al.

Affiliated with

Also associated with

Rating

Method for extending thermoplastic foams having smooth external 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 for extending thermoplastic foams having smooth external , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for extending thermoplastic foams having smooth external will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-671476