Patent ID: 8562330

Claim:
A rim rolling apparatus, comprising: a plurality of rim rolling screws, each screw having an entrance end cylindrical tube providing a hot section and an exit end cylindrical tube providing a cool section downstream of the hot section; a thermal isolation tube coupling together the entrance end tube and the exit end cylindrical tube in proximate, spaced-apart relation having a first coupling cylindrical outer surface configured to mate with a complementary surface on the entrance end cylindrical tube and a second coupling cylindrical outer surface configured to mated with a complementary surface on the exit end cylindrical tube, the first coupling cylindrical outer surface and the second coupling cylindrical outer surface provided on respective, spaced-apart circumferential bulkheads and a cooling gap interposed between the first coupling outer surface and the second coupling outer surface to provide thermal isolation there between; a motor for driving the screws; and a pneumatic cooling circuit extending within the screw from an exit end towards an entrance end, the cooling circuit provided in thermally conductive relation with the cool section and insulated from the hot section and further communicating with the cooling gap of the thermal isolation tube.