Extrusion of insulating plastic

Details Extrusion of insulating plastic Extrusion of insulating plastic

1981-04-02

1982-10-19

Thurlow, Jeffery R.

Plastic and nonmetallic article shaping or treating: processes

With measuring, testing, or inspecting

Controlling heat transfer with molding material

264 402, 264 459, 264511, 264571, 264174, 425113, 425114, 425141, 425467, B29D 2700, B29F 310

Patent

active

043549896

ABSTRACT:
Molten plastic material is extruded uniformly about an advancing core by dividing a single stream of the plastic flowing to a die assembly transversely to the direction of advance of the core, into a plurality of streams, in which one half of the plastic flows along a first path spaced around the core and then towards the core; the other half of the plastic flows in a second path which is, in essence, a mirror image of the first path; the divided streams are reunited as a tubular sleeve of flowing plastic flowing in the direction of the advancing core, spaced around the core and flowing towards the advancing core.

REFERENCES:
patent: 2893056 (1959-07-01), Henning
patent: 2980958 (1961-04-01), Ellis, Jr.
patent: 3071809 (1963-01-01), Lerch
patent: 3087007 (1963-04-01), Jachimowicz
patent: 3538547 (1970-11-01), Drabb
patent: 3581343 (1971-06-01), Henrikson et al.
patent: 3860686 (1975-01-01), Myers
patent: 3903233 (1975-09-01), Dougherty
patent: 3914357 (1975-10-01), Cereijo
patent: 4165957 (1979-08-01), Kertscher
patent: 4279851 (1981-07-01), Lord et al.

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