Patent ID: 7972128
Filing Date: 2011-07-05
Classification: B28B

Abstract:
1. A mold for forming dry cast concrete retaining wall blocks front molded face up; the retaining wall blocks, with respect to orientation in a retaining wall, having the front molded face with a predetermined three-dimensional pattern, an opposite rear face, top and bottom opposite faces extending between the front and rear faces, and side faces extending between the front and rear faces and the top and bottom faces; the bottom face having a lip projecting therefrom; the mold comprising: a pair of opposed mold side walls; at least a pair of opposed division plates extending between the opposed mold side walls, the mold side walls and division plates defining a mold cavity having an open top and an open bottom; a cleaning system comprising a fluid injection system constructed and arranged to deliver pressurized fluid through the at least one bore in the at least one division plate to non-manually remove dry cast concrete from the undercut which forms part of the lip-forming subcavity.