Combined concrete feed and packerhead lift control

Details Combined concrete feed and packerhead lift control Combined concrete feed and packerhead lift control

1986-01-27

1987-01-27

Silbaugh, Jan

Plastic and nonmetallic article shaping or treating: processes

With measuring, testing, or inspecting

264312, 425145, 425150, 425262, 425427, B28B 718, B28B 1302, B28B 2110

Patent

active

046393420

ABSTRACT:
A method and apparatus for making concrete pipe having substantially uniform density throughout the length of the pipe has a packerhead which is rotated and lifted within a mold, and a conveyor for feeding concrete into the mold. A combined conveyor speed and packerhead lift control operates in response to the amount of power used to rotate the packerhead to slow the speed of the conveyor to a desired speed and change the lift speed of the packerhead when the load on the motor for rotating the packerhead exceeds a selected upper load limit or falls below a selected lower load limit.

REFERENCES:
patent: 3551968 (1971-01-01), Fosse et al.
patent: 3619872 (1971-11-01), Fosse
patent: 3746494 (1973-07-01), Gauger
patent: 4336013 (1982-06-01), Hand
patent: 4340553 (1982-07-01), Fosse
patent: 4406605 (1983-09-01), Hand
patent: 4407648 (1983-10-01), Fosse
Perry and Chilton, "Chemical Engineer's Handbook", 5th Ed., McGraw-Hill, 1973, pp. 22-70 to 22-73.

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