Working Under Pressure

Blind risers can only work properly for the limited number of cast alloys with a strong tendency to form a solid skin during solidification, such as steel alloys. This skin formation means that shrinkage in the casting leads to an under-pressure in those areas where feeding is needed.

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Real Prototype – Realistic Casting?

Before start of production, many real castings are required for testing under realistic conditions. As with many of these prototype castings, the aluminum steering knuckle shown here was produced as a sand casting. The failure of the prototype casting in a test run would lead to design changes: heavier cross-sections to better withstand the load.

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