Synthetic resin injection molding apparatus

Claim 1

A plastic injection mold apparatus, having piled mold clamping means and piled mold releasing means including a plurality of male and female molds, said piled molds supported between said clamping means, said molds adapted to define a plurality of cavities, a plurality of runners between the parting lines of adjacent selected male molds, T-shaped gates branching from said male mold runners, said T-shaped gates leading to said cavities, and a plastic injection head including a sprue, said plastic injection head disposable substantially perpendicular to the plane of said mold cavities, said head and molds when clamped adapted to fit closely upon injection of plastics substantially without loss of plastic and forming an inner space between said head and said clamp molds, said space forming a runner substantially at a right angle to the runners between the parting lines of said male molds, said right-angle runner adapted to bypass each of said parting line runners.