Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – To produce composite – plural part or multilayered article
Patent
1997-02-14
1999-01-26
Thomas, Alexander
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
To produce composite, plural part or multilayered article
264275, 428 76, 4289033, 52DIG9, 156 95, B29C 3900
Patent
active
058634835
ABSTRACT:
Shock-absorbing blocks for bullet stops at firing ranges and for traffic trol are made by encasing scrap rubber tires in concrete. To ensure firm attachment of the tires to the concrete, reinforcements such as wire loops are fastened to the tire. To prevent the formation of air pockets during the pouring of the concrete mixture into a mold holding the tire, vent holes are punched into the side walls of the tire. To allow the concrete mixture to flow under the tire in the mold, the tire is propped up with support blocks. Wires may be strung across the top of the tire and attached to the side walls of the mold to prevent movement of the tire while the concrete is being poured into the mold. The concrete mixture may contain an aqueous foam additive, a stabilizer, and fiber reinforcements such as steel or organic polymers.
REFERENCES:
patent: 4348133 (1982-09-01), Trent et al.
patent: 4553875 (1985-11-01), Casey
patent: 5103616 (1992-04-01), Nordberg
patent: 5292467 (1994-03-01), Mandish et al.
patent: 5464153 (1995-11-01), Broughton
patent: 5507127 (1996-04-01), Gates
Malone Philip G.
Tom Joe G.
Marsh Luther A.
The United States of America as represented by the Secretary of
Thomas Alexander
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