FROM
METALCASTINGDESIGN.COM
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . BLOG ROLL
Coming to a Class Near You
Whether you are a casting buyer or a fi fth grade student, a fi eld trip to a metalcasting facility can be eye opening. A college project has found a way to bring the casting facility to the student. We recently witnessed a Foundry in a Box demonstration at a Cast Metals Institute intro to metalcasting course. In the time it takes to zap a baked pota- to, the demonstrator melted tin in a small crucible using a household microwave revamped for this special purpose. Students were able to make their own sand mold and have a go at pouring in the liquid tin. If learning is doing, this certainly is an effective way to understand the casting process. By the way, the whole “foundry” does indeed fi t into a 31.5 x 22.87 x 19-in. shipping case.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . POLL QUESTION
The March/April website question
asked: Does your company consider a metalcaster’s environmental impact when evaluating it as a supplier?
No 57.1% Yes 42.9%
This month’s question is available at
www.metalcastingdesign.com.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ONLINE ARTICLE
Centrifugal Casting: Not Just For Pipes
A true centrifugal casting machine, which
can be oriented horizontally or vertically, pushes metal outward under forces many times that of gravity, where the material hits the mold wall and spreads evenly over the surface. Horizontal machines achieve good uniformity throughout the casting. “In the vertical [true centrifugal
casting] process, there is the effect of gravity, so it’s a parabola that’s thicker at the bottom,” said Jack Lilley, VP of engineering and quality assurance for Wisconsin Centrifugal, Waukesha, Wis. As molten metal strikes the surface
of a spinning mold in the centrifugal casting process, it transfers heat into that surface more quickly than into
the air on the opposite side and cools and solidifies only on the mold face. This eliminates the possibility of air
and gas being trapped in the casting and shrinkage defects. The process also limits inclusion defects.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ONLINE RESOURCES
Wherever you fi nd the cast metal “at” sign (right), reference the given website for more information.
MAY/JUNE 2011
Castings of the Year (p. 22): Hear an audiocast with one of the award winning casting designers.
Besler Industries Puts Pricey Part to Pasture (p. 32): Read about other casting conversions.
Industry Prepares for Growth at Congress (p. 42): Read the best papers from the show.
METAL CASTING DESIGN & PURCHASING 3
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