After-Treatment and Finishing for Investment Castings

Sand Washing

Castings are sent to sand washing room to do the first time of sand washing and remove the most remaining ceramic sand after shell removal process

Cutting

To use of the cutting machine to cut apart the required casting and die head

Grind

Grinding the gate and making it flat after cutting castings depends on client’s request or demand

Weld Repair & Fix

Grinding the gate and making it flat after cutting castings depends on client’s request or demand

Heat Treatment

According to customer’s demand and request, different heat treatment can be chosen such as solid solution, normalization, annealing, precipitation and hardening and tempering

Sand blasting & Pickling

Castings do final washing and ensure the corner of internal and external are no residual ceramic sand

Pickling is called passivation treatment can chemically remove free iron and the external of the metal grain of the surface to become a protective layer against rust especially for stainless steel

Straighten

Different types of casting may be deformed by external or natural factors and then the use of hydraulic machines and customized mold and fixture to reform casting within the standard size