| 摘要 |
<p>An apparatus for use in cutting a contoured surface in the face of a polystyrene foam block (16) for use in casting concrete, wherein the contoured surface will form the mold surface. The apparatus comprises means for supporting (12) a block (16) of polystyrene foam material, a generally rigid wire (18) having opposite ends, and means for heating the helical wire (18) such that the wire can cut through the polystyrene foam block (16). The apparatus also comprises means for supporting (20) the heated wire (18) for controlled vertical and horizontal movement with respect to the polystyrene foam block, and with respect to a reference position.</p> |
