XK-400/450/560/610/660 CAST IRON TWO ROLL OPEN MIXING MILL FOR SILICONE RUBBER 1. PRODUCT INTRODUCTION FOR XK-400/450/560/610/660 CAST IRON TWO ROLL OPEN MIXING MILL FOR SILICONE RUBBER 1.1 PHOTOS 1-2. Basic introduction for open mixing mill machine/Bearings Rubber two roll Mixing Mill. The open mixing mill …