To provide a manufacturing apparatus of granular tile materials capable of manufacturing granular tile materials from waste tiles, having superior safety and appearance with no sharp corner on the surface, and with glaze removed from the surface.

The manufacturing apparatus is provided with: a crushing part B crushing charged tiles into a granular state; a screw conveyer C formed by rotatably providing a screw 22 having a rotary shaft 22b and spiral blades 22a formed on the outer periphery of the rotary shaft 22b in a trough 20; and agitation members 23 provided in the screw 22 to connect the spiral blades 22a with each other. Granular tiles crushed by the crushing part B are carried obliquely upward by the screw conveyer C to grind the surface of the granular tiles to form the granular tile materials with the surface corners removed.

COPYRIGHT: (C)2008,JPO&INPIT