Manufacture of sponge rubber spheres

Details Manufacture of sponge rubber spheres Manufacture of sponge rubber spheres

1979-02-12

1981-06-09

Smith, Gary L.

Abrasive tool making process, material, or composition

With carbohydrate or reaction product thereof

264 15, 264 28, 264162, B24B 100, B24B 1108

Patent

active

042716390

ABSTRACT:
This disclosure relates to the manufacture of sponge rubber spheres, such as spheres (10) used for cleaning tubes internally, and the shapes made thereby. The sponge rubber is initially cut into cubes approximating the shape of the final product. Next the sponge rubber is frozen by means of liquid nitrogen. Then while in the frozen state it is machined to the final shape. This machining could be performed by a centerless grinding technique involving a grinding wheel (41), a regulating wheel (42), and a work rest (43). Additionally, a plurality of shapes may be formed at one time from a single block of sponge rubber (30) as shown in FIG. 2.

REFERENCES:
patent: 2167215 (1939-07-01), Leary
patent: 2335294 (1943-11-01), Meyer
patent: 2801824 (1957-08-01), Tarpogge
patent: 2867000 (1959-01-01), Huszar
patent: 3112851 (1963-12-01), Collins
patent: 3640028 (1972-02-01), Richard
patent: 3812224 (1974-05-01), Smith
patent: 3874124 (1975-04-01), Morgan
patent: 4021280 (1977-05-01), Rinde

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