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| Robert Gordon, Patrick Mahone, The Texture of Industry, Oxford Press 1994 |
In this photo foundry workers pose with a mine hoist sheave wheel they have just cast in a sand mold. The wheel would have been cast flat and has been stood up with the wooden jib crane on the left. It tuns out the foundry is the Knight foundry in Sutter Creek, California which amazingly is still operating, the last water-powered foundry and machine shop in America.
2 comments:
Those foundry workers can be justifiably proud of their work. That's a very challenging casting to make - not just the risk of internal shrink defects at the transitions between different section thicknesses, but the large, flat "rangy" aspect of the design makes warping hard to avoid.
Don in Oregon
The material would be cooling at different rates, and there isn't a lot of material to slow the process down.
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