Machine for making concrete pipes

Plastic article or earthenware shaping or treating: apparatus – Control means responsive to or actuated by means sensing or... – Feed control of material en route to shaping area

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Details

425262, 425424, 425427, 425456, 425457, B28B 2128

Patent

active

051679671

ABSTRACT:
A concrete pipe making machine having a pair of combined roller head and vibrating core assemblies used with two molds to prepack and vibrate concrete within the molds to simultaneously produce two concrete pipes. A controller is programmed in response to packing forces of the packerheads to control conveyors that discharge concrete into the molds and the lift speed of the packerhead and core assemblies to produce concrete pipes having uniform density throughout the length of the concrete pipes.

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