Patent ID: 7438247

Claim:
A composite grinding roller ( 1 ), produced by casting, comprising peripheral inserts ( 5 ) made of a material with high wear resistance and great hardness, sealed during said casting in a ductile matrix ( 19 ), said ductile matrix ( 19 ) infiltrating around or into the peripheral inserts( 5 ) during this casting in such a way as to establish close contact at the interface between said peripheral inserts ( 5 ) and said ductile matrix ( 19 ), said roller ( 1 ) comprising first zones subjected to heavy wear ( 14 ) as well as second zones subjected to light wear ( 13 ), wherein said first zones ( 14 ) have, on its peripheral surface, the peripheral inserts ( 5 ) with an abutting part ( 6 , 7 ) and said second zones ( 13 ) have a non-abutting part, the gap in said non-abutting part ( 12 ) being filled by said ductile material ( 19 ) during the casting, allowing sufficient mechanical fixation for the peripheral inserts.