Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – Composite article making
Patent
1997-02-27
1998-11-10
Kuhns, Allan R.
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
Composite article making
264 467, 264 469, 2642711, 264275, 264278, 2642791, 4283166, B29C 4406, B29C 4412
Patent
active
058338977
ABSTRACT:
A method of forming a ball-shaped unit including (1) molding an inner core subunit from a high-resilience, polyurethane foam material, (2) lining the wall of a mold cavity which is larger than such a formed inner core subunit with a thin film of an outer, skin-forming material--preferably a water-based, pigmented, acrylic emulsion, barrier release coating for urethane foam, (3) suspending the inner core subunit generally centrally within and circumsurroundedly spaced from the lined mold cavity wall, (4) filling the space intermediate the inner core subunit and the lined mold cavity wall with a soft, slow-return, polyurethane material thus to form an outer core subunit which encases the inner core subunit and which is encased by the skin-forming material, and (5) removing from the mold cavity, in the form of the desired ball-shaped unit, the assembly including the inner and outer core subunits and the skin-forming material.
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Kuhns Allan R.
OddzOn Products, Inc.
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