Electric Plasticizing Drive Units
Servo screw-drive units that replace the hydraulic plasticizing motor.
Electric plasticizing units turn the screw of an injection molding machine with a permanent-magnet servo motor instead of a hydraulic motor. Most versions combine a liquid-cooled motor, an integrated planetary reducer and a matched servo drive, with mounting dimensions made to match the hydraulic motor they replace, so they suit both retrofits of hydraulic machines and new builds. Units are selected by screw torque and speed, from small high-speed machines up to machines of several thousand tonnes.
Typical specifications
- Output torque
- 300 – 65,000 N·m rated (S1); peak up to 95,000 N·m
- Output (screw) speed
- 40 – 400 r/min
- Motor rated power
- 8.9 – 340 kW
- Machine size fitted
- approx. 50 – 4,000 t clamping force; screw Ø30 – 260 mm
- Reduction
- Planetary (built-in or separate), parallel-shaft gearbox, belt, or gearless direct drive; ratios approx. 4 – 31.5
- Cooling & supply
- Liquid cooling (water or oil) of motor and reducer, air-cooled options; 380 V class, 3-phase
Ranges across the product family. Exact figures depend on the model.
Options
- Servo motor with built-in planetary reducer: compact one-piece unit that mounts in place of the hydraulic motor
- Servo motor with separate planetary reducer, in-line or right-angle
- Servo motor with parallel-shaft helical gearbox for large screws and very high torque
- Belt-and-pulley reduction for small, low-torque screws
- Gearless direct-drive low-speed high-torque motor for high-speed and thin-wall machines
- Drive-integrated versions: motor + drive (2-in-1) or motor + reducer + drive (3-in-1)
- Adapter plates to match existing hydraulic-motor flanges
Applications
- Retrofit of hydraulic injection molding machines (screw drive)
- High-speed thin-wall packaging machines
- PET preform machines
- Bucket, crate and logistics-pallet molding
- PPR pipe-fitting machines
- Medical and other dedicated machines
- General PP / PS / PE and PC molding
Reported benefits
- Energy saving of 15–30%
- Plasticizing can run at the same time as other machine movements, shortening the cycle; productivity gain of 20% or more
- Mounting dimensions interchangeable with the hydraulic motor being replaced
- Low noise: below 70 dB for geared units, below 60 dB for direct-drive units
- Drive efficiency above 93% for geared units and above 95% for direct-drive units
Figures reported by the manufacturers; results depend on the machine and process.
Send the part number, a nameplate photo or your operating conditions.
