Method for extrusion production of large dimensional thermoplast

Details Method for extrusion production of large dimensional thermoplast Method for extrusion production of large dimensional thermoplast

1984-11-09

1987-11-03

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Production of continuous or running length

15624414, 15624421, 264171, 264173, 26417719, 2642094, 2642102, 264237, 4251311, 425325, 4253261, B29C 4790

Patent

active

047042443

ABSTRACT:
Thermoplastic articles such as fenders, of large cross-sectional dimensions, may be made by extrusion without shrinkage voids by extruding a first stream of thermoplastic as a hollow profile, and extruding a second stream of molten thermoplastic by a second extruder and forcing same under pressure into the hollow profile to fill the voids of shrinkage on cooling.

REFERENCES:
patent: 3189941 (1965-06-01), Reifenhauser
patent: 3477099 (1969-11-01), Lee et al.
patent: 3552259 (1971-01-01), Griffith
patent: 3825641 (1974-07-01), Barnett

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