Method of producing composite material having foamed resin layer and surface layer
OwnerHisao Tezuka, Motoaki Ueguriinventors
Life of this patent
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Abstract
AbstractA method of producing a composite material, including providing a surface layer in a first mold such that the surface layer is in contact with an interior surface thereof, disposing a second mold in position so that a space is defined between the second mold and the surface layer, the second mold having plural groups of perforations; feeding expanded resin beads to the space to fill the space therewith, deaerating the space, and then introducing a heating medium into the space successively through the plural groups of perforations of the second mold to fuse and bond the expanded resin beads.
Claims13
A method of producing a composite material, comprising the steps of:
- (a) providing a surface layer in a first mold having an interior surface such that the surface layer is in contact with said interior surface;
- (b) disposing a second mold in position such that a space is defined between said second mold and said surface layer in contact with said interior surface of said first mold, said second mold having plural groups of perforations;
- (c) feeding expanded resin beads to said space to fill said space therewith;
- (d) deaerating said space;
- and then
- (e) introducing a heating medium into said space successively through said plural groups of perforations of said second mold to fuse and bond said expanded resin beads into a foamed resin layer with said surface layer being bonded to said foamed resin layer, step (e) being performed once or more times.
A method as claimed in any preceding claim, wherein the number of said plural groups is two.
A method as claimed in any preceding claim, wherein the heating medium is steam.
A method as claimed in any preceding claim, wherein step (a) comprises molding said surface layer with said first mold.
A method as claimed in any preceding claim, wherein said expanded resin beads are made of a polyolefin resin.
Dependencies are inferred from the claim text.