Necking down exothermic insulation riser sleeve

Advantages:it can reduce the contact area of the riser and the casting piece in the process of the top riser. Compared with the common sand mold riser, it can reduce 60--70% of the cutting and grinding area ,which reduce the fee of clearing and reduce the cost.

The loose shrinkage defect also can be eliminated . You can harvest stable casting pieces in the automatic molding line. It can be used for cooling the riser for its febrile. It can also reduce the pouring system ,which is good for nodular iron casting.