Apparatus for centrifugal molding of concrete pipe

Details Apparatus for centrifugal molding of concrete pipe Apparatus for centrifugal molding of concrete pipe

1980-03-04

1982-06-15

Derrington, James H.

Plastic article or earthenware shaping or treating: apparatus

Means withdrawing trowel type shaping member from within...

264311, 425426, B28B 2124

Patent

active

043348483

ABSTRACT:
In radially centrifugally molding sections of concrete pipe with a bell at one end, the concrete is poured downwardly into an upwardly extending mold which forms the outer surface of the pipe section. The lower end of the mold is shaped to form the bell end of the pipe section. The concrete is centrifugally forced outwardly against the inner surface of the mold and then is pressed outwardly by a series of rotatable rollers. A pressure wheel is located within the mold above the position of the rollers for limiting the upward movement of the concrete pressed outwardly against the mold and for increasing the concrete pressure acting downwardly toward the bell end of the concrete pipe section.

REFERENCES:
patent: 3358342 (1967-12-01), Spence
patent: 3746494 (1973-07-01), Gauger

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