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The Gem and Jewelry World's foremost Resource on The Internet. Open to the public, Free of Charge!
We are here to build a strong pool of information for the benefit of Web's jewelers and craftsmen - and those interested in jewelry and gemstones.		  
     
 
 
 
 
 

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Articles by Eddie Bell
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[298] Sprues, Feed Sprues and Gates
A very high percentage of investment casting defects can be directly or indirectly attributed to the design of the sprue system feeding metal to the pattern. Defects such as incomplete pattern filling and shrinkage porosity are easily identified as directly related to poor sprue design. Gas porosity might be caused by a poor burnout but it could also be caused by casting at a higher than necessary temperature. And the elevated temperature could be necessary for complete pattern filling through an inadequate sprue system; this is an example of the sprue system indirectly causing a defective casting.... (2002)
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Welcome to the Ganoksin Project The Gem and Jewelry World's foremost Resource on The Internet. Open to the public, Free of Charge! We are here to build a strong pool of information for the benefit of Web's jewelers and craftsmen - and those interested in jewelry and gemstones. | Site Map | Jewelry Making Articles | Orchid Forums & Archives | Members Blogs | Galleries | BenchTube - Jewelry Making Videos |
| The BenchExchange | MetalCalc | Industry Web Sites Guide | Press Room | Advertising | Contact Us | Link to Us | RSS feeds| More...