Optimization Design of Riser for Heavy Hot Spot of Cylinder Block Iron Castings
This paper describes the common feeding riser(ear riser) or outlet riser(joint flash riser),which are currently used for heavy hot spot in sand cast iron cylinder block.These types of riser are prone to appear or difficult to overcome common casting defects,such as shrinkage,dispersed shrinkage(and leakage).The role and effect of kiss riser used in cast iron cylinder block castings are briefly introduced.More detailed describe is given on the design concepts and skills of necking riser which achieve a good technical and economic,especially for those innovative applcations in the "middle" section of heavy hot spot of cast iron cylinder block.