INJECTION MOLD HAVING A VALVE GATE SYSTEM

摘要

An injection mold has a valve gate system in which a valve pin is moved through a runner into and away from a gate to open and close the gate. The valve pin is inserted into the gate to close it after each injection stroke and the end face of the valve pin defines a part of the surface of an injection-molded article when the valve pin is in the gate. The end face of the valve pin is provided with a designed irregularity.