Concrete extrusion machine

Details Concrete extrusion machine Concrete extrusion machine

1991-05-16

1992-06-23

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

Building forms or construction engineering type mold with...

264 70, 425262, 425426, 425427, B28B 100

Patent

active

051238314

ABSTRACT:
An extrusion machine for making hollow elongated articles of concrete has an eccentric compaction disc that reciprocates and rotates to compact and release air from zero slump concrete. The machine avoids having to have a high frequency converter which is both expensive and noisy. At least one extruder screw is provided in the machine to feed concrete and form the elongated article. The screw has a die former at the outlet end to form a cavity in the elongated article. An eccentric compaction disc is positioned between the outlet end of the extruder screw and an input end of the die former, the input end of the die former is eccentric and coplanar with an eccentric disc face mounted for movement in a circular orbital path about the extruder screw axis. The output end of the die former is concentric with the extruder screw axis.

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