Divided hollow core slab extruder

摘要

Hollow core concrete slabs are extruded through a compaction chamber of an extruder by a plurality of augers with forming elements at their downstream ends. A divider is supported within the compaction chamber to extrude two concrete panels at a time on opposing sides of the divider. A top plate of the compaction chamber carries vibrators on opposing sides of the divider. The top plate includes a relief formed therein in alignment with the divider to permit some independent compaction on opposing sides of the divider. The divider is fixed in relation to a frame of the extruder with a clearance gap between the divider and the top plate being provided. When extruding interlocking tongue and groove panels, the forms for the grooves are supported on opposite sides of the divider while forms for the tongues are supported on the outer sides of the compaction chamber for improved compaction of concrete at the divider.