Underwater pelletizer

Abstract

An underwater pelletizer driven from a standard foot mounted electric motor having a standard C-flange attachment in which a pelletizer shaft having a hub is keyed to the motor shaft and held in place by a set screw with the key being welded in a slot in the pelletizer shaft hub to facilitate its manufacture. The pelletizer shaft includes a spring loaded cutter hub enabling automatic blade attachment and compensating for misalignment with the spring loaded cutter hub being keyed to the pelletizer shaft by a key that is welded in a slot in the spring loaded cutter hub to simplify its manufacture and provide a positive and dependable drive connection to enable movement of the portion of the spring loaded cutter hub connected with the blade assembly. The die plate is provided with carbide tiles and the blade assembly includes tungsten carbide blades to provide extended die ware and extended blade ware. The pelletizer shaft includes a slinger to prevent any liquid migrating through the shaft seal from running along the shaft and getting into the motor bearings. A weep hole is provided in the adaptor connected to the motor flange to dischage seal leakage and a secondary weep slot is provided on the adaptor at its junction with the motor flange to provide additional assurance that liquids leaking past the seal and slinger will not migrate into the motor bearings.