SparkDepo Coating Application Videos

Before: Molten Al flows rapidly into the die. Fraction occurs and wearing is in progress on the surface of the die.

After: Against a 350–400 HMV die, the coating layer applied with Cermet electrodes (hardness > 2,000 HMV) extremely protects the die surface.

Before: Die surface erosion occurs on contact with high-temperature molten Al.

After: Preventing erosion amount within 1/10 from the die surface, thanks to the coating's poor-wettability material. (See Erosion Test Results on the Coating Demo page.)

Before: Molten Al and the die surface are easy to react with each other; seizing and scuffing occur at the contact area.

After: Preventing seizing and scuffing by the coating's poor-wettability (uneasy-to-react) material against molten Al.

Before: Stress accumulates in the die surface with repeated heating from teeming molten Al (expanding) and cooling from die lubricant (shrinkage), causing heat cracks.

After: The insulating effect of intercalated minute air in the coating's slight surface roughness (a tongued-and-grooved face) controls expansion and shrinkage, preventing heat cracks.

Before: Underfill occurs in the product when molten Al contacts the cooled die surface and cools down, reducing liquid flow.

After: The insulating effect of intercalated minute air in the coating's slight surface roughness keeps liquid temperature and flow, preventing underfill.

Before: Liquid flows along the die design and flow lines occur at the cold shut.

After: Coating with a controlled degree of surface roughness at the cold shut controls flow direction uniformly, preventing flow lines caused by turbulence.