B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
18/641
B29C 49/00 (2006.01) B29C 44/12 (2006.01) B29C 44/18 (2006.01)
Patent
CA 1280861
Abstract Moldless process for manufacturing foamed arti- cles is disclosed wherein a trim cover is first prepared as having a composite structure of an outer surface material such as fabric and an inner backing material of low melting point such as a thin foam of polystyrene and having a shape substantially corresponding to a final contour of a fin- ished article to be obtained; the trim cover is heated and forced to form a pre-shaped cover conforming to the final contour of the finished article preferably by means of a restraining frame such as a basket or plastic cage config- ured to the final contour of the finished article: high reactive polyurethane composition foamable at low internal pressure then poured into the pre-shaped cover and allowed to foam and expand to fill substantially an entire volume of the pre-shaped cover; and then externally heating of the pre-shaped cover is conducted at or near temperatures of the melting point of the backing material so as to con- siderably shrink the backing material interposed between the surface material and the foaming polyurethane and cause the backing material to virtually disappear while allowing the polyurethane to further expand to adhere to and become integral with the inside of the surface material to thereby obtain an integrally foamed article without the use of the so called mold.
554324
Goto Fumio
Ogawa Taro
Gowling Lafleur Henderson Llp
Namba Press Works Co. Ltd.
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