Plastic and nonmetallic article shaping or treating: processes – With measuring – testing – or inspecting
Patent
1978-05-03
1980-01-15
Hoag, W. E.
Plastic and nonmetallic article shaping or treating: processes
With measuring, testing, or inspecting
264255, 264257, 264271, 264310, B29C 504, B29C 508, B29D 302
Patent
active
041838831
ABSTRACT:
Low speed rotational molding of plastic objects at about ambient temperatures from a liquid thermosetting plastic material distributed in a mold substantially under gravitational force; the selected thermosetting plastic is placed as a distributable liquid in a mold having a volume much larger than the volume of the liquid polymer and slowly rotated about two axes at or about room temperature; urethane polymers to which a quantity of diamine curing agent has been added prior to the introduction of the flowable plastic into the rotatable mold are typical thermosetting materials; useful objects or shapes having thin, relatively uniform walls are produced by the disclosed process; repetition of molding steps allows the build up of same or different layers which may have interposed therebetween, lightening, stiffening, and/or strengthening members; precoating of a mold with a variety of coatings which release, interact, or decorate the thermoset resin surface is also disclosed.
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Hoag W. E.
Monster Molding, Ltd.
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