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A Design Study in Metal Matrix Composite Castings - AAAV Transmission Case                                           

Rigging and Gating Design

The transmission case is cast with the barrel in a vertical orientation. The mold has two down sprues which feed into runners and ingates. The ingates must provide sufficient metal flow without excessive velocity or turbulence.
  >> Multiple gates are required to provide
         complete flow into thin walls.

Two different gating designs were considered and are shown in the drawing to the right --

- Option A - Three gates on each side.
- Option B - Five gates on each side.

Choose the gating system
(Option A or Option B )
which provides the best metal flow into the thin walls.

Option A -- Three Ingates on a Side
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Option B - Five Ingates on a Side
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Last Modified:September, 2001 by STG

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