Manufacture of structural members from solid waste
OwnerWilbert E. Leeseinventor
Life of this patent
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Abstract
The method and apparatus for forming a structural member from solid waste which consists of comminuting or shredding solid waste into particles one inch or smaller, adding a small amount of a thermoplastic material such as polyurethane or polyethylene to produce bonding, then heating the mixture and forcing the heated mixture through a restrictive extrusion die under high compression which forms the same in a predetermined transverse cross sectional configuration. Thereupon, the shaped compressed mixture is allowed to cool while maintaining the predetermined shape, and upon cooling, a thermoplastic cover encapsulates the compressed shaped product. The structural member is then cut into the desired lengths.
Claims2
The method of continuously forming a structural member from solid waste material comprising the steps of:
- (a) comminuting solid waste into small particles to form a first mixture,
- (b) adding and mixing fly ash or baking soda to said first mixture for bonding rate control to form a second mixture,
- (c) heating said second mixture,
- (d) adding polyurethane to said second mixture to form a heated third mixture wherein the bonding rate thereof is controlled by said fly ash or baking soda,
- (e) forcing the heated third mixture by successive repetitive compressive impacts while under very high compression through a heated restriction die of such size as to further raise the temperature of said third mixture to form a predetermined transverse cross section configuration,
- (f) passing the compressed third mixture in the predetermined cross sectional configuration through a complementarily shaped cooling mold, and
- (g) extruding an encapsulating cover of synthetic material over the cooled predetermining configuration of the third mixture.
Dependencies are inferred from the claim text.