Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – Composite article making
Patent
1974-02-07
1976-08-03
Anderson, Philip
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
Composite article making
264 469, 264 50, 264 53, 264 54, 264174, 264DIG5, 425113, 425817C, B29D 2700, B29F 310
Patent
active
039729702
ABSTRACT:
A product comprising a cellular plastic material is extruded from a modified conventional extrusion head by injecting a gaseous expanding medium into advancing fluent plastic material through porous material forming at least a portion of a section of the core tube in an extrusion chamber. By controlling the interrelationship between various process parameters such as the speed and pressure of the advancing fluent plastic material, the rate of injection of expanding medium into the advancing plastic material, the place where the expanding medium is injected, and the amount the extruded product is allowed to expand before cooling, it is possible to extrude, from a single source of fluent plastic material, a product comprising many different configurations of cellular and solid plastic material such as a uniform cellular structure throughout, or a cellular plastic inner section with a more dense outer covering.
REFERENCES:
patent: 2000835 (1935-05-01), Goldberger
patent: 2640033 (1953-05-01), Marshall
patent: 2848739 (1958-08-01), Henning
patent: 3251911 (1966-05-01), Hansen
patent: 3316335 (1967-04-01), Snella et al.
patent: 3466705 (1969-09-01), Richie
patent: 3773877 (1973-11-01), Baker et al.
patent: 3782870 (1974-01-01), Schippers
patent: 3792839 (1974-02-01), Gidge
patent: 3796779 (1974-03-01), Greenberg
patent: 3857914 (1974-12-01), Aishima et al.
Anderson Philip
Kelley D. P.
Rosen A. S.
Western Electric Company Inc.
LandOfFree
Method for extruding cellular thermoplastic products 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 extruding cellular thermoplastic products, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for extruding cellular thermoplastic products will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1929641