Method and apparatus for moulding hydraulic cement or the like m

Details Method and apparatus for moulding hydraulic cement or the like m Method and apparatus for moulding hydraulic cement or the like m

1974-11-25

1977-07-19

Pavelko, Thomas P.

Plastic and nonmetallic article shaping or treating: processes

Forming structural installations in situ

Uniting preform member with molding material

264 36, 264 403, 264 404, 264 69, 264 90, 264102, 264256, 264261, 264328, 264333, 264DIG78, E04B 116

Patent

active

040369226

ABSTRACT:
Hydraulic cement or the like is poured into a closed mould under a reduced pressure condition to a level slightly higher than a predetermined level. Coarse aggregate and steel rods are prepacked in the mould. After pouring the pressure in the mould is increased to atmospheric pressure or a higher pressure to force the hydraulic cement above the predetermined level back into the space below the level thus compacting the poured in hydraulic cement. A cushion device is provided for the pouring device. An overflow tank is connected to the mould to observe the level of the poured cement. The pressure in the overflow tank is also decreased during pouring and increased after pouring.

REFERENCES:
patent: 886768 (1908-05-01), Bogory
patent: 1558782 (1925-10-01), Bleecker
patent: 2165671 (1939-07-01), Ward
patent: 2313110 (1943-03-01), Wertz
patent: 2548935 (1951-04-01), Billner
patent: 2560619 (1951-07-01), Wertz
patent: 2913036 (1959-11-01), Smith
patent: 3177273 (1965-04-01), Fingerhut
patent: 3192594 (1965-07-01), Fouger
patent: 3663148 (1972-05-01), Walker
patent: 3875278 (1975-04-01), Brandt

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