B - Operations – Transporting – 28 – B
Patent
B - Operations, Transporting
28
B
25/58
B28B 1/30 (2006.01) B28B 7/18 (2006.01) B28B 7/30 (2006.01) B28B 7/38 (2006.01) B28B 13/06 (2006.01) E04B 2/42 (2006.01)
Patent
CA 1287734
ABSTRACT A concrete mold core assembly and method for making a concrete masonry block is disclosed. The assembly comprises a mold box including side walls for forming at least part of a mold cavity. At least one mold core has substantially vertically disposed walls establishing with the side walls a mold cavity open at the top and bottom thereof. The axis extends vertically between the top and bottom ends as a casting axis. The mold core contains laterally extending plungers movable into the mold cavity along an axis transverse to the casting axis. A material's feed tray is movable into an overhead position above the mold box to feed liquid concrete into the mold cavity. A pallet is movable into position adjacent the bottom end of the mold cavity to establish a mold cavity bottom retaining the concrete and the mold cavity to form the block. A compression stripper shoe movable in the direction of the casting axis strips the cast block from the mold cavity in coordination with the pallet being moved to a spaced location away from the mold cavity bottom. Control means is provided for selectively extending the laterally projecting means into the mold cavity and the control is operable to retract the laterally projecting means from the cavity following introduction of liquid concrete into the mold cavity. Retraction of the plungers from the mold cavity occurs prior to removal of the pallet from the mold cavity bottom. The control means senses full retraction of the laterally projecting plungers from the mold cavity to thereby enable prevention of removal of the pallet in response to failure of the plungers to fully retract.
500993
National Concrete Masonry Association
Smart & Biggar
LandOfFree
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