The sprue bushing directs the flow of plastic into the runner system. There is a spherical radius (1/2 in. or 3/4 in.) on the machine side to assure an alignment of the machine nozzle and the mold. This assures continuous plastic flow into the mold.
Inside the locating ring, recessed through clamping and “A” plates. Located on the “A” half of the mold.
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