Quality Testing
Foundry
Vishal Foundry have 3 stages of Quality inspection.
1) Incoming inspection
At Vishal Foundry Incoming inspection is carried out for every batch of major raw material and consumables like:
- Pig iron
- Mild steel scrap
- CRCA scrap
- Silica Sand
- Mold paints
- Bentonite
Note: All the tests are conducted in our lab. We do not buy recycled casting scrap for our castings at all as there is risk of unwanted elements getting into the final chemistry. We rely on the inspection certificates for all the alloys used in the casting bought from standard suppliers in the market.
2) In-Process inspection
In-Process inspection is carried out for all the processes as per control plan of the quality manual like:
- Mold hardness inspection for every mold using portable mold hardness tester.
- Core scratch hardness inspection using scratch hardness tester.
- Core gas determination to detect gas formation after pouring in the mold.
- Sand properties like Compressive green strength, permeability, moisture%, Loss of ignition, Volatile matter, AFS size and clay content is tested in our exclusive sand lab.
- Metal properties like metal chemistry before and after pouring with an In-House Spectro meter, Metal temperature during tapping and pouring using an Infra-Red non-contact type pyrometer. We also use Carbon silicon analyzer for cross verification of chemistry.