... bearing bus XK-450 Two Roll Mill/Rubber Open Mixing Mill/Laboratory Mixing Mill1.Certification:we have ISO9001:2008 , SGS, ... Product factory for Natural Rubber Mixing(plasticating),Raw Rubber and Compound mixing,rubber warm-up mixing and pressing sheet.4. General ... , bearing, roll nip adjusting, screw, heating and cooling device, emergency stop, lubrication system and such sections as electrical ...