Usage: The madchine is specical equipment using in bias tire industry. This series of heavy-duty mixing mill, warm-up mill and feeding mill are used for auxiliary machine under internal mixer which are developed by our corporation with high starting point and level. They have now arrived advanced international standards. The series have two forms on structure. The first strucfure: Front and rear rolls are cast steel rolls with alloy, roll surfaces are treated by hard facing to make them bigger strength, higherhardness, better bending resistance and resistance to torsion as well as to be of wear-resisting and corrosion resisting surfaces; the driving system has been adopted 4-stage cylinclrical gearbox with two autput shafts and full hard teeth surface, and front and rear rolls are connected througth a pair of cross universal-joint coupling. The driving type is adopted a enclosed drive to make it bigger driving power and higher driving efficient; the control system can be operated through site-control and combined it with telecontrol. The second form: The front and rear rolls are rolls for chilled cast iron with alloy; driving system is 3 stages cylindrical gearbox with full hard teeth surfarce which brings velocity ratio gears driving. The bearing of these two forms are all used with double row contact rolling bearing, it has these characteristics: Well-cooling, smoothly-drive, low-noise and high-effectiveness. The machine is separatly suitable for rubber sheeting of the auxiliary mechine of mixer as well as warming, refining of compounds which are needed by 3 rolls / 4 rolls calenders and supply compuonds for them. Technical specifications: Model: Xk-660 Working dia of roller: 660mm Working length of roller: 2130mm Linear speed of rear roller: 35. 46m / min Frication ratio front / rear roller: 1: 1. 24 Gapping range and gapping type: 0. 5-15mm / motor adjust Capacity: 450kg / h Motor power: 245kw Weight: 49000kg