| 摘要 |
A method of operating a concrete block machine including filling a feedbox with dry cast concrete when the feedbox is at a retracted position, moving the feedbox from the retracted position to an extended position over an open top of a mold, the mold including at least one mold cavity, depositing dry cast concrete from the feedbox into the at least one mold cavity via the open top of the mold, moving the feedbox from the extended position to the retracted position after depositing the dry cast concrete in the at least one mold cavity, and controllably moving a moveable cutoff element of a cutoff bar coupled to the feedbox so as to adjust a distance between the moveable cutoff bar element and the top of the mold as the feedbox moves from the extended position to the retracted position such that the moveable cutoff bar element selectively removes varying amounts of the deposited dry cast concrete so that a depth of concrete remaining in a portion of the at least one mold cavity corresponding to the moveable cutoff element varies in a desired fashion in a direction of movement of the feedbox.
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