Apparatus and method for eliminating static charge from polystyr

Details Apparatus and method for eliminating static charge from polystyr Apparatus and method for eliminating static charge from polystyr

1990-09-17

1991-07-23

Dawson, Robert A.

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

264 455, 264 50, 264 51, 264126, 4251744, 4251748E, 361213, B29B 1308, B29C 3500

Patent

active

050341677

ABSTRACT:
A process for eliminating the static charge from expandable polystyrene beads during a molding cycle. Pre-expanded polystyrene beads are injected into a mold cavity by using an air stream created by a venturi-type fill gun. To prevent the beads from carrying static while being injected into the mold, the air is ionized by exposure to high energy nuclear particles prior to contact with the polystyrene beads.

REFERENCES:
patent: 2547132 (1951-04-01), Longfellow
patent: 3641605 (1972-02-01), Lindsay
patent: 4185783 (1980-01-01), Lacchia
patent: 4438479 (1984-03-01), Schwartz et al.
patent: 4514779 (1985-04-01), Wilkinson
The brochure, "Nuclecel(R), Air Gun and Ionized Air Blower", Herbert Products, Inc., Westbury, NY., one page.
Brochure, Form No. 3699-A, "Nuclestat(R) Nuclear Static Neutralization", Herbert Products, Inc., Westbury, NY, one page.
Brochure, Form No. 3698, "Methods of Static Control", Herbert Products, Inc., Westbury, NY, one page.

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