The investment casting cable car ring is composed of eight dis-uniform interval square tooth disc which is connected by triangle rib with square tube with a stop-end.The investment casting ring possesses the features of complicated shape and high position accuracy requirement.The gating system for the ring was rationally designed.The correction mould with cutting-free was adopted to correct the accuracy

which could not only improve the precision grade

but also improve the surface quality and strength of the ring.Using special monitoring apparatus to measure and square tooth groove combining with auxiliary position

the manufacturing precision of cable car ring could be ensured only working a middle hole.