Method of rotationally molding plastic articles

Details Method of rotationally molding plastic articles Method of rotationally molding plastic articles

1974-09-25

1980-01-22

Arnold, Donald J.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

260897B, 264331, B29C 504, C08L 2308

Patent

active

041850670

ABSTRACT:
A method of rotationally molding blends of polymers of good flow to produce articles of high impact resistance, high stress crack resistance, smooth surfaces, and the absence of excessive warpage in which the blend is placed in a rotational mold which is then biaxially rotated about two perpendicular axes while heating the mold and contents and then cooling the mold and contents to about room temperature while maintaining this biaxial rotation followed by removing the resulting article. The disclosure also includes the rotationally molded shaped structures resulting from this method with these structures having high impact resistance, high stress crack resistance, smooth surfaces and the absence of excessive warpage.

REFERENCES:
patent: 3627869 (1971-12-01), Walton
patent: 3634578 (1972-01-01), Suzuki
patent: 3784668 (1974-01-01), Neidinger
patent: 3974114 (1976-08-01), Sowa
patent: 4029729 (1977-06-01), Rees et al.
patent: 4032600 (1977-06-01), MacAdams et al.
Dubois and John, Plastics, pp. 47-54, (Reinhold Publishing Corporation, 1967).

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