Patent ID: 7963758

Claim:
A locking device for a mold including at least three plates, the locking device comprising: a biased wedge block that is movably mountable to a first of the plates, the wedge block including a first side wall and an opposing second side wall beveled with respect to the first side wall; a latch bar that is fixedly mountable to a second of the plates and including a latch end for engaging with the second side wall of the wedge block; a cam bar that is fixedly mountable to a third of the plates and including a cam end for engaging with the first side wall of the wedge block; wherein each of the latch bar and the cam bar is formed of a steel alloy, each of the latch end and the cam end is nitrided or nitride coated, and a remaining portion of each of the latch bar and the cam bar has a lower hardness for machining.