Manufacture of structural members from solid waste

Plastic and nonmetallic article shaping or treating: processes – Treatment of material by vibrating – jarring – or agitating... – Continuously formed or indefinite length article

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Details

264112, 264115, 264920, B29C 4700

Patent

active

059252960

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.

REFERENCES:
patent: 3239881 (1966-03-01), Larsen
patent: 3523147 (1970-08-01), Hold et al.
patent: 4081259 (1978-03-01), Bassin et al.
patent: 4145389 (1979-03-01), Smith
patent: 4225640 (1980-09-01), Erb
patent: 5201020 (1993-04-01), Kannabiran
patent: 5503788 (1996-04-01), Lazareck et al.
patent: 5523328 (1996-06-01), Rosenbaum et al.

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