B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
B29C 44/18 (2006.01) B62D 29/00 (2006.01)
Patent
CA 2514101
The invention is a process for the preparation of article comprising placing a film (27) on each inner surface of each part of a two part mold (21, 22); placing an article (26) in the mold (20) with film (27) located between the surface of the mold and the article (26) such that there is a sma space (29) between the article and the surface of the mold; closing the mold the article; injecting between the film and the article an expandable plastic material (12) under conditions that the article (26) is coated with the expandable material (12) and the expandable material does not expand; removing the plastic article with the expandable material coated thereon with the two films attached to the expandable plastic material. In another embodiment the invention is an article comprising a shaped plastic article; an expandable material coated in the shaped plastic article; and a film covering the material coated shaped plastic article. In another embodiment the invention is a method of reinforcing a structural member which comprises inserting an article according to this invention into a cavity of the structural member and heating the structural member and the article to a temperature at which the expandable plastic material expands and the film or the expandable material bonds to the inner surface of the structural member so as to fix the location of the article in the structural member.
L'invention porte sur un procédé de préparation d'un article comprenant les étapes suivantes: placer un film sur chacune des surfaces intérieures d'un moule en deux parties (21, 22); placer un article (26) dans le moule (20) le film (27) étant disposé entre la surface du moule et l'article (26) de manière à laisser un petit espace (29) entre l'article et la surface du moule; refermer le moule sur l'article; injecter entre le film et l'article un matériau plastique expansible (12) enduisant l'article mais ne se dilatant pas; retirer du moule l'article (26) revêtu du matériau plastique expansible (12) auquel les deux films sont attachés. Dans une variante, l'article comporte une pièce de plastique moulée, un matériau expansible la revêtant, et un film entourant le matériau plastique. L'invention porte également sur un procédé de renforcement d'un élément structurel consistant: à insérer un article conforme à l'invention dans la cavité d'un élément structurel, puis à chauffer l'élément structurel et l'article à une température à laquelle le plastique se dilate, ce qui fait adhérer le film ou le matériau à la surface intérieure de l'élément structurel, et maintient en place l'article à l'intérieur de l'élément structurel.
Boven Michelle L.
Brodil Jason C.
Eagle Glenn G.
Li Zhicheng
Dow Global Technologies Inc.
Dow Global Technologies Llc
Smart & Biggar
LandOfFree
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