Patent ID: 8137423

Claim:
A method of making an abrasive article comprising an abrasive disc formed of non-woven fibres, a metal shaft positioned at the centre of the abrasive disc and a hub securing an end of the metal shaft to the abrasive disc, the method comprising the steps of: providing a mould having first and second mould plates which together define a mould cavity dimensioned to accommodate the abrasive disc, the second mould plate having a bore formed therein to accommodate the metal shaft so that one end thereof projects into the mould cavity and a recess in the moulding surface of the second mould plate around the bore and the first mould plate having a channel for injection of molten thermoplastic material into the mould cavity, the channel positioned opposite the end of the metal shaft and the channel opening into a central recess in a moulding surface of the first mould plate positioned above the end of the metal shaft; placing the metal shaft into the bore; placing the abrasive article into the mould cavity; closing the mould; forming the hub by injecting molten thermoplastic material into the abrasive disc through the channel; and allowing the thermoplastic material to cool and solidify such that the metal shaft is bonded to the hub and the hub is anchored to the abrasive disc.