Process and apparatus for the manufacture of expanded plastics m

Details Process and apparatus for the manufacture of expanded plastics m Process and apparatus for the manufacture of expanded plastics m

1977-10-05

1979-11-06

Anderson, Philip

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

34 1, 219 1055A, 219 1055F, 264 51, 264DIG9, B29D 2700, H05B 906

Patent

active

041736087

ABSTRACT:
The present invention provides an apparatus for the manufacture of pre-expanded particles, which comprises in combination a heat-insulated resonating cavity, with a high-frequency electromagnetic source of energy, a ferrite circulater, a wave guide, an Archimedes screw for the introduction of the plastics material to be pre-expanded, a pump for regulating the feed of polar liquid and a device for extracting the pre-expanded particles. The present invention provides also a process for the pre-expansion of particles of plastic material using said apparatus.

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