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An Example in Steel Casting    The Ice Cleat on the M1 Abrams Tank

Gating Systems

Metal Flow into the Mold

The gating system (sprues, runners, and gates) provides paths for the molten metal to flow into the mold. For steel castings, it is important that the mold fills quickly, without turbulent flow.

  • Runners and gates have to promote high volume, low velocity flow.
  • On the ice cleat, the logical location for the gate is directly into the thickest section of the cleat. 
  • The size of the ice cleat is small enough that multiple items can be produced in one pouring by putting several ice cleat patterns on a "tree"  with the gates connecting into a single runner.

The runners and gates need to be integrated with the placement of the risers.

 

Gate Schematic

Schematic of a Gating System

 

 

The two diagrams below show two views of the gating design.   The first diagram shows the detail of how the gate is integrated into the baseline design. 

The second diagram shows how multiple components are branched onto a runner and gating system to produce six ice cleats in one pouring.

Drag4.jpg (24722 bytes)

Detail of Gating into Cope Section

Gate 3.jpg (64994 bytes)

Drawing of 6-On Gating System

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SFSA Last Modified:December, 1998 by STG
Copyright 1995 - '98 by Steel Founders' Society Of America.
All rights reserved. Address Comments to:monroe@sfsa.org
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