Patent ID: 6941939
Filing Date: 2005-09-13
Classification: B23D,B24B,B28D,Y02P

Abstract:
1. A facing machine for hard-fired ceramic tiles, which machine comprises: a structure for supporting, and setting the cutting depth of, at least one pair of rotary rollers at a grooving station, the axis of said rollers lying transverse to the infeed path of said tiles as carried on a belt transport; said rollers comprising a plurality of disks formed with diamond-tipped cutting teeth and spaced apart abreast said tiles; and a facing station comprising a plurality of vertical-axis grinding wheels with abrasive diamond-tipped tooling; characterized in that the disks with diamond-tipped cutting teeth have identical working diameters in one set of roller-mounted disks, the cutting edges of the teeth having very closely the same circumferential length and being made of a suitable abrasive material for even wear of the cutting edges in one roller-mounted set of disks; that the rollers comprised of disks with diamond-tipped cutting teeth are carried on a common supporting structure, the structure being adjustable in height to set the tool cutting depth in the tile; at least two of the rollers lying next to each other in the direction of tile advance, and being set and/or adjusted sideways to associate the grooves cut in the tile surface by the disks of a preceding one of the rollers with the grooves cut by the disks of the successive roller; the depth at which the grooves are cut being the same or very closely approaching a set depth; the structure being pivotable about a parallel shaft to the work surface in a transverse direction to the feed direction of the work surface, and being associated with a device for adjusting and inhibiting the pivotal movement of the structure in order to accommodate varying cutting diameters of the rollers at said station; and that the grinding wheels comprise rotary heads mounting diamond-tipped cutting tools, themselves for rotation on the heads.