Patent ID: 8434707

Claim:
An apparatus for fracturing polycrystalline silicon comprising: a pair of rolls which are rotated in a counter direction each other around parallel axes; and a plurality of fracturing teeth units which are provided on outer peripheral surfaces of the rolls, which are arranged along a circumferential direction of the rolls, and which have a plurality of fracturing teeth and fixing covers fixing the fracturing teeth on the outer peripheral surfaces of the rolls, wherein the fracturing teeth has flanges which expand in diameter at a base part, and the fixing covers are formed as strips along a longitudinal direction of the rolls, in which a plurality of fixing holes for the fracturing teeth are formed along the longitudinal direction, and are fixed on the rolls in a state in which top ends of the fracturing teeth are protruded outward radially of the rolls from the fixing hole outward so as to hold the flanges between the fixing covers and the rolls, the apparatus fracturing fragments of polycrystalline silicon between the rolls.