Sub Gate - (May Also called a Tunnel Gate, Cashew or Banana)

Gating away from the parting line can be accomplished by using a Sub Gate.  The Sub Gate also provides for automatic De-Gating of the Runner and Part within the mold.

Cashew,  Banana gates require split inserted steels.  Split steels are required to facilitate machining.  Standard inserts are readily  available.
    The diameter at the gate is .030-.090 for unfilled materials and .100-.125 for filled materials.  The angle is typically at 30 to 45 degrees from vertical.  Ejector Pins are required to ensure automatic de-gating.

A Sub Gate will leave a Pin sized Scar on the part.

Courtesy: DME Corp.