13.4 Screw Motor
A high-torque, low-speed hydraulic motor is required because the high viscosity of the resin at the nozzle can cause stalling of the screw. Also, the lower feed provides easier melt temperature control, because not as mush mechanical heat is produced.
This screw motor is interchangeable with the standard unit and readily bolts in place.
Note : When converting to thermoplastic molding, the standard normal speed hydraulic motor should be installed on the machine for high-speed control.