Plastic article or earthenware shaping or treating: apparatus – With mechanical means forming or expanding pores
Patent
1993-07-07
1995-10-10
Woo, Jay H.
Plastic article or earthenware shaping or treating: apparatus
With mechanical means forming or expanding pores
264 452, 264 51, 2643286, 264DIG77, 366189, 366275, 366314, 425206, 425209, 425543, 425817R, B29C 4436, B29B 702
Patent
active
054565863
ABSTRACT:
An apparatus for manufacturing articles made of polyurethane that includes a mold assembly in communication with a mix chamber. The mix chamber is positioned below the mold assembly. The mix chamber includes a propeller for mixing the liquid polyurethane chemicals. The mix chamber further includes a pneumatically actuated bladder that causes the mixed chemicals to move from the mix chamber to the mold assembly. The chemicals expand to take on the shape of the mold. The method of the present invention comprises the steps of: (a) selecting polyurethane chemicals having certain specific weights; (b) placing said chemicals in a mix chamber wherein chemicals stratify according to their specific weights to prevent detrimental reaction among the chemicals until final mixing; and (c) allowing the chemicals to expand to form an article.
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Smith Duane S.
Woo Jay H.
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