a mold assembly for injection molding a part, the mold assembly comprising a first mold and a second mold adjacent to the first mold;

a catch plate rigidly attached to the first mold;

a base plate rigidly attached to the second mold; and

an L-shaped latch arm pivotally attached to the base plate such that the L-shaped latch arm engages the catch plate and holds the first mold adjacent to the second mold;

an actuator mounting plate, with an actuator access aperture, rigidly attached to the base plate; and

a pneumatic actuator, with an actuator piston, rigidly attached to the actuator mounting plate and configured to engage and move the L-shaped latch arm between a locked position and an unlocked position.