Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – Composite article making
Patent
1992-03-03
1993-12-21
Kuhns, Allan R.
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
Composite article making
264 466, 264257, B29C 6722
Patent
active
052718859
ABSTRACT:
A method of producing inside linings with a skin of polyurethane material and a polyurethane support reinforced with fiberglass pour-behind foamed together in a mold. The method operates in such a fashion that the support is first produced separately from a fiberglass mat, cut to size with exact contours and dimensions relative to the finished inside lining, and saturated with polyurethane material to form a support with a protruding edge section consisting only of the polyurethane material. The polyurethane skin is inserted into a lower mold with an edge that protrudes in the separation plane of the lower mold. The separately produced polyurethane support is then inserted into the upper mold with the edge section, made only of polyurethane material, lying in the separation plane. The support and the skin are pour-behind foamed by filling the polyurethane material into the open mold. The mold is closed so that the edge section of the separately produced support in the separation plane contacts the skin and forms a seal. The mold is then opened, and the molding is taken out. If one works with a closed mold, the mold naturally is first closed; and the polyurethane material is filled into the closed mold. The edge section consisting only of polyurethane material is cut off from the end product so that the waste consists solely of recyclable polyurethane material. At the same time, the edge section forms a seal during pour-behind foaming, which prevents the polyurethane material from reaching the outside surface of the skin during pour-behind foaming.
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Denker Ernst
Reisinger Gerhard
BASF - Aktiengesellschaft
Carmen Dennis V.
Kuhns Allan R.
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