Motors key to fast arm pallet wrapper

The engineers at Technowrapp had an idea that, if successfully executed, would result in the world’s fastest arm pallet wrapper. But they also wanted to ensure their Runner Arm would be simple to operate and easy to maintain.

In the Runner Arm automatic rotary arm pallet wrapper, the engineers created a device that can wrap 136 pallets/hour with 10 turns per pallet, stabilizing a pallet with just 76 g of stretch wrap film (value achieved with 15 μm film).

BonfiglioliThe rotary arm with centripetal contrast ring contains and guides the arm as it moves and makes it possible to reach 45 rpm, combining this with low structural stress. The cutting and welding pliers operate on the moving load, contributing to the increase in speed and efficiency of the work cycle.

To achieve these speeds, the engineers used Bonfiglioli’s C, W, and BE/BN motor series for the pallet and vertical carriage movement as well as the ring rotation and the servo-assisted tensioning systems. The motors were used for the tensioning, feeder, and plier carriages, as well as for the presser and linear roller.

The carriage system is equipped with Bonfiglioli’s W63 and BN_FD Motors with a motor power of 0.75 kW. In addition, the tensioning and plier carriage are also equipped with W63 and BN_FD Motors, with motor powers of 0.55 kW for the tensioning carriage and 0.37 kW for the plier carriage; the tensioning carriage also uses a W86/BE motor with a motor power of 1.1 kW.

The arm rotation uses Bonfiglioli’s W110/BN_FD motor series with 4 kW of motor while the presser uses a W63 BN_FD motor with 0.55 kW of motor power. The linear roller uses the C22 BE series with 0.75 kW of power. These various motor solutions have helped the Runner Arm achieve high speeds while maintaining low structural stress.


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