Plastic and nonmetallic article shaping or treating: processes – Treatment of material by vibrating – jarring – or agitating... – By reciprocating or vibrating mold
Patent
1995-08-29
1997-04-29
Aftergut, Karen
Plastic and nonmetallic article shaping or treating: processes
Treatment of material by vibrating, jarring, or agitating...
By reciprocating or vibrating mold
264247, 264251, 264254, 264256, 264264, 264277, 264278, 264279, B28B 108, B28B 116
Patent
active
056246153
ABSTRACT:
Modular stone panels simulate assembled masonry, and are useful for decorative walls, retaining walls, facings for structures and the like. Precast stone-faced panels are made by setting stones such as field stone having at least one relatively flat face, substantially directly on the bottom of a rectangular mold. The stones are set in the mold individually while packing sand around and between the stones but not under them. This is done by sliding each stone laterally across the bottom of the mold, thereby packing the sand while substantially keeping the stones supported immovably against the bottom. The stones do not float on a sand bed and the sand between them is packed. Thus the stone and sand are less readily displaced by concrete poured over them to fill the mold. The concrete bonds part way into the packed sand, which can be facilitated by vibration, causing a liquid portion of the concrete to diffuse into the sand. Retaining rods are carried on coil threaded rods that are removed to provide either points of attachment for mounting or lifting, or as weep holes. The retaining rods can extend into edge cavities and preferably into tubular receptacles, filled with concrete to lock joints between adjacent panels. For making corners, alternating stones protrude from the concrete in a first cast panel, and are interleaved with stones when casting a next panel so as to extend around the corner in lieu of a solid concrete strip. The stone facing can extend over only a part of the panel height, particularly for retaining walls, which can be passively braced using the threaded point of attachment and a buried anchor such as an automobile tire.
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