Through analyzing shape

structure of DN200 water curtain spool and its investment casting process

investment casting process was designed.For mould design

three-pushing mould was design

and precision position was realized by a cone-shape position ring as position joint.During wax pattern making process

according to the injecting volume

through hand-made lots of irregular hard wax cluster to add into cavity of the mould and then injecting

inadequate injecting volume can be overcome.In addition

through adding cold wax strip

the shrinkage deformation is decreased to improve the dimension precision of the castings

so the high quality parts were produced successfully.