An Example in Steel  Casting  --  Lever Arm in the BMW Engine Valve Train

Mold Configuration and Orientation

The orientation of the parts in the investment mold is an important factor in wax removal,  metal flow control, thermal management, and high metal yield. 

The part should be oriented in the mold so that:

  • wax can flow freely out of individual cavities and is not trapped in the mold during dewaxing.

  • metal flows uniformly and smoothly into the cavity without dropping or splashing.

  • Parts are close packed on the tree for uniform heating and cooling and volume efficiency (high yield). 

      Option A -- Horizontal Orientation of Wax Patterns on Sprue

Option B -- Vertical Orientation of Wax Patterns on Sprue

The lever arms can be positioned in the mold with a vertical or a horizontal orientation relative to the sprue.

Choose the casting orientation (Option A or Option B) which  simplifies wax removal, provides smooth and direct metal flow, and maximizes yield.


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Last Modified:October, 2003 by STG

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