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A Design Study in Steel - Crossbleed Valve for the F-5

Option C -- Third Gate

In Option C, a third gate is added to the casting which feeds directly into the center shaft. 

A small boss is added to the center shaft as a connection point for the gate.

This third gate  in the middle will provide the center shaft  the molten metal needed to eliminate shrinkage porosity during solidification.  

The two original gates still provide good metal feed into the top of the main cylinder and the cup.

The "Third Gate"  is the best design option for producing a flaw-free casting. 
Go on to the next design issue.


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Copyright 2007 by the Steel Founders' Society of America.
All rights reserved.  Address comments to: 
blairr@sfsa.org
Last Modified:December, 2007 by STG

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