- 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.
First step of sand washing.
- To use of the cutting machine to cut apart the required casting and die head.
- Grinding the gate and making it flat after cutting castings depends on client’s request or demand.
Weld Repair & Fix
- If castings have some slight defects or burrs, the welding repair and fixing will be proceeded in order to improve the quality.
- According to customer’s demand and request, different heat treatment can be chosen such as solid solution, normalization, annealing, precipitation and hardening and tempering.
- 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.
- 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.
Straighten / Punch.
Straighten and check the dimension.