Packerhead and core control system

Details Packerhead and core control system Packerhead and core control system

1979-01-29

1981-03-03

Parrish, John

Plastic article or earthenware shaping or treating: apparatus

Control means responsive to or actuated by means sensing or...

Mold motion or position control

425168, 425427, 425432, 425457, B29D 2308, B29C 306

Patent

active

042538149

ABSTRACT:
A concrete pipe making machine having a packerhead vibrating core and a control for automatically controlling the movement of the packerhead and core relative to each other as the packerhead and core move up and down within a mold to form a concrete pipe. The control has valve units operable to restrict the flow of hydraulic fluid supplied to the hydraulic control cylinders which control the movements of the packerhead and core.

REFERENCES:
patent: 3545053 (1970-12-01), Besser
patent: 3660003 (1972-05-01), Waddington
patent: 3758245 (1973-09-01), Hermes
patent: 3765173 (1973-10-01), Harris
patent: 4118165 (1978-10-01), Christian

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