| 摘要 |
A makes blocks from pressed earth. A press foot is raised to a first level even with an open upper end of a breech. A feed drawer having an open lower end and filled with loose earth is moved laterally across a planar surface into registration over the breech. The press foot is lowered to a second level in the breech to receive loose earth from the feed drawer. The feed drawer is withdrawn laterally across the planar surface out of registration with the breech to screed excess loose earth from the breech. A bucking foot is lowered to close the upper end of the breech. The press foot is raised to a third level to compress the loose earth in the breech into a block. The bucking foot is raised to a level higher than the top of the feed drawer to permit vertical ejection of the block from the open upper end of the breech into the lateral path of the feed drawer. Upon raising the press foot to the first level, a previously-made block will be raised into the lateral path of the feed drawer. Upon moving the feed drawer laterally into registration over the breech, the previously-made block will be pushed out of the path of the bucking foot. In making vertically and laterally tongue-and-grooved blocks, the press foot and the bucking foot have complimentary three dimensional upper and lower surfaces, respectively, and the breech has complimentary three dimensional opposite side surfaces.
|
