Cold gates are used when a cold runner system has been chosen. The following section describes different cold gates, and why you might select one over another.
Topics in this section
Cold Circular Tapered Arc
Circular tapered gates are automatically trimmed gates, and will break or shear when the molding tool is opened to eject the part.
Cold Circular Tapered
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.
Cold Rectangular Tapered
Rectangular tapered gates are manually trimmed gates and require an operator to separate the part from the runners in a secondary operation.
Cold Rectangular
Rectangular gates are manually trimmed gates and require an operator to separate the part from the runners in a secondary operation.
Cold semi-circular
A cold gate is used when a cold runner system has been chosen.
Hot annular gate
An annular gate is used with an internally heated runner system and valve gates.
Hot circular tapered gate
A hot circular tapered gate can be used with either externally heated or insulated runner systems.
Hot circular gate
A hot circular gate can be used with either externally heated or insulated runner systems.