Highest torques, efficiency and reliability are the main characteristics of our POSITWIN series of Brevini twin screw extruder drives. This series reaches a torque factor up to 20 per shaft.
The case hardened gears are ground and optimized with a profile correction based on its bending and torsion load. The high gear contact ratio ensures a low noise level in these gearboxes.
Axial forces generated by the machine during extrusion are absorbed in the gear by tandem bearings and self-aligning roller thrust bearings. More than 7.000 Brevini PIV twin screw extruders have been produced since 1985 and prove their reliability and performance day by day, installed at the leading companies in the plastics, rubber, pharmaceutical and food industries.
The POSIRACK line of rack-and-pinion drives has been built by PIV Drives since 15 years for the mold locking in many electrical injection molding machines. Brevini Injection Molding Drives with highest accelerating and decelerating torques are quiet running spur gearboxes featuring a compact construction with an integrated motor. POSIRACK is a quiet running helical gear drive combined with spur gears and a dou-ble-toothed rack.
Case hardened and profile-correction ground gears and rack ensure that high acceleration and brake torques will be safely transmitted. Performance opimized gear tooth forms handle bending and torsional loads while achieving optimal noise behavior through a high contact ratio factor.
The sophisticated design ensures proper guidance of the rack within the gear unit. Optimized load sharing permits rack speeds up to 2000 mm/s. These high efficiency rack and pinion drives allow to reduce your cycle times and create higher output volumes.
This reliable series of Brevini PIV gearboxes, with attached or integrated thrust bearing, can be supplied as bevel or helical gear. Brevini single screw extruder drives of the POSIREX series are completely made in Germany.
The modular design of this gearbox series is based on our range of helical and bevel helical gearboxes, plus appropriate thrust bearing-parts which are readily available. Mounting position horizontal or vertical, splash lubrication and cooling coil with or without injection lubrication are possible options.
This Brevini PIV series is based on our widespread experience in the plastics & rubber industry, with more than 20,000 drive units being produced in Germany and providing their reliability and performance day by day in extrusion, compounding and injection moulding machines.