Method of destroying a brittle body by hydration expansion

Details Method of destroying a brittle body by hydration expansion Method of destroying a brittle body by hydration expansion

1985-12-19

1989-03-28

Lowe, James

Plastic and nonmetallic article shaping or treating: processes

Dental shaping type

264138, 264221, 264317, 264DIG44, 433213, A61C 1320, B29C 3344

Patent

active

048161942

ABSTRACT:
A method of destroying a brittle body by molding around an elastic tube or an elastic tube in which is inserted a plastic wire or a heat-fusible member for defining a charging hole where the member or tube is partly exposed at the surface of the brittle body, and, after pulling out the elastic tube or fusing the heat-fusible member, an expandable splitting agent capable of expanding by hydration is charged into the charging hole and subjected to hydration-expansion to destroy the brittle body. In another form, a water-impermeable film enclosing an expandable splitting agent capable of expanding by hydration therein is previously buried in a brittle body in a relation partly exposed at the surface of the brittle body, and, after aperturing the exposed end of the water-impermeable film, the expandable splitting agent is subjected to hydration-expansion to destroy the brittle body.

REFERENCES:
patent: 2217734 (1940-10-01), Dreyfus
patent: 2739350 (1956-03-01), Lampman
patent: 3213163 (1965-10-01), Brite
patent: 3217067 (1965-11-01), Tencate
patent: 4017570 (1977-04-01), Rice
patent: 4252760 (1981-02-01), Foster
patent: 4264661 (1981-04-01), Brandolf
American Machinists; G-15-59 "Exposive Forming".

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