A cold gate is used when a cold runner system has been chosen. Common examples of circular tapered gates include subgate, submarine, tunnel and chisel gates.
A circular tapered gate, such as a submarine (tunnel, chisel) gate is an automatically trimmed gate, and will break or shear when the molding tool is opened to eject the part. It is tapered from the runner to the part.
Common names: submarine, tunnel, chisel, sub-gate