FROM METALCASTINGDESIGN.COM
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Casting Sets Another Tone
It’s offi cial. Metalcasting rocks. When we waxed melodically about the metal castings found in musical instruments in 2007, we hit the cymbals, drums, piano and hand bells. Now, castings are adding a decorative touch to the most ubiquitous of instruments—the guitar. DBZ Guitars, Chicago, is using castings to adorn a new line of its handmade axes. The castings are produced in the hand casting process, which uses permanent molds to produce products with enhanced surface fi nishes.
Metallurgists Aren’t the Only Ones Who Dig Microstructure
Gray cast iron is beautiful. Don’t agree with us? McMaster Univ. research technologist Doug Culley used a microscope to show students the microstructure of gray cast iron, and the image recently earned image of distinction honors in Nikon’s 2009 Small World Photomicrography Competition.
When to Select Nobake Casting In nobake casting, sand is mixed with a chemical binder/catalyst system and then
molded around the cope and drag halves of the tooling. Nobake molding is known for its versatility. Virtually all metals can be cast in the process, with component weights ranging from less than a pound to several hundred thousand pounds. Nobake molding offers: • good dimensional tolerances (±0.005-0.015); • compatability with most pattern materials, including wood, plastic, metal, fi berglass and styrofoam;
• design fl exibility for intricate casting shapes; • reduced opportunity for gas-related defects; • fi ne surface fi nishes that can be upgraded further; • ability to work well with unique metalcasting quality enhancement tools; • low to medium volume production capability with runs from 1-5,000 parts/year.
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Wherever you fi nd the cast metal “at” sign (right), reference the given website for more information.
JANUARY/FEBRUARY 2010
Global Casting Supply Level (p. 24): Review the census from past years.
Cast Connex Sources Cast Part for Construction Need (p. 30): See other interactive casting design tutorials.
Minimizing Porosity in Cast Junctions (p. 34): Read another article on defect- reducing design.
Casting Process on Display at New Show (p. 39): Learn more about the show.
METAL CASTING DESIGN & PURCHASING 3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . POLL QUESTION
The November/December website
question asked: During an economic downturn, which of the following strategies does your company employ?
All of These 59.4% Negotiate 15.6%
With Suppliers
Re-Engineer Products
Seek Less Expensive Suppliers
None of These
12.5% 6.3%
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6.3%
This month’s question is available at
www.metalcastingdesign.com.
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