The heat sink blocks are cast in a 4-cavity die, producing four castings in a single shot.

The gating into each cavity has a large cross-section to produce high-volume flow into these heavy components.

Gating is on the side with tangential feed into the cavity. This produces produce smooth, rapid laminar metal flow into the cavity.

Two large cross-section center runners provide rapid metal feed from the biscuit area into the four gates.