Plastic and nonmetallic article shaping or treating: processes – Carbonizing to form article – Agglomeration or accretion
Patent
1976-03-03
1981-09-08
Pavelko, Thomas P.
Plastic and nonmetallic article shaping or treating: processes
Carbonizing to form article
Agglomeration or accretion
264 70, 4251742, B29F 300
Patent
active
042883989
ABSTRACT:
An apparatus and method are provided for controlling the internal structure of articles of manufacture which are formed by solidifying a plastic or metal in a mold or extrusion die simultaneously as ultrasonic energy is applied to the solidifying material to effect beneficial control of the crystalline structure formed thereof upon solidification. Ultrasonic energy may be transmitted to the solidifying material through either the wall of the die or mold, a mandrel portion of a die or a portion of a mold which defines a cavity formation in the molded article. Ultrasonic vibrations may be utilized per se or in combination with other forms of energy applied to the solidifying material so as to orient or otherwise control the grain or crystalline structure thereof for improving the strength and other physical characteristics of the solidified article.
REFERENCES:
patent: 1318740 (1919-10-01), Fessenden
patent: 2408627 (1946-10-01), Green
patent: 2615271 (1952-10-01), Ulmer
patent: 2763040 (1956-09-01), Korb
patent: 2897557 (1959-08-01), Ornitz
patent: 2973564 (1961-03-01), Dixon
patent: 3045302 (1962-07-01), Patton
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