Plastic article or earthenware shaping or treating: apparatus – Distinct means to feed – support or manipulate preform stock... – And means to apply stress to preform and uniting in stressed...
Patent
1991-10-18
1993-06-01
Woo, Jay H.
Plastic article or earthenware shaping or treating: apparatus
Distinct means to feed, support or manipulate preform stock...
And means to apply stress to preform and uniting in stressed...
425117, 425128, 425589, 425817R, 249 96, 249153, B29C 3910
Patent
active
052157610
ABSTRACT:
An apparatus for producing a longitudinal multi-component frame element includes a longitudinal mold within which is positioning at least one longitudinal member to form a first component of the frame element. A second component of the frame element is formed by introducing into the mold a foamable and curable material such as polyurethane which cures to form a rigid plastic component connected to the longitudinal member. Before formation of the rigid plastic component, the longitudinal mold is bent in a direction opposite to a direction of anticipated warping of the frame element that would be caused by internal stresses therein. Thus, the frame element initially is formed within the mold to be of a bent configuration, and after removal of the frame element from the mold, the internal stresses transform such initial bent configuration into a straight or rectilinear configuration.
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Patent Abstracts of Japan, vol. 10, NR. 193 (M-496) 2249, Jun. 8, 1986 = JP-A-61 37 518 (Kojima Press).
Masco Industries, Inc.
Nguyen Khanh P.
Woo Jay H.
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