Library > Casting > Lost Wax Casting |
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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)
 Complete Story | | Show me more articles from: [The World Gold Council]|[Eddie Bell] | | Releated Categories: [Lost Wax Casting] | | | [835] Testing new High Definition Patterns in the shop | Invented by Victor Joyner, a Chicagobased manufacturing jeweler, patented High Definition (HD) Patterns are made of a light-curing polymer material that can he injected into a silicone mold with very low pressure at room temperature. After hearing about the exceptional detail achieved by these patterns, and the subsequent clean burnout, I decided to put the material to the test in my shop.... (2006)
Complete Story | | Show me more articles from: [AJM]|[Linus Drogs] | | Releated Categories: [Lost Wax Casting] | | ISBN: B00006K39S | | [39] Wax Tools | Dental probes and knives make good wax tools. Your local dentist or dental hygienist or school for the same can supply you with used tools for free. If they don't.... (1994)
Complete Story | | Show me more articles from: [Brain Press Publications]|[Charles Lewton-Brain] | | Releated Categories: [Lost Wax Casting]|[Tools]|[Small Tools] | | |
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