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Smart, compact granulators

Source:Plastics News Asia     Date:2021-04-08
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Plastic sprues are typically composed of clean production scrap and can therefore be easily reused. The G-Max series of compact beside-the-press granulators from WITTMANN is specifically designed for closed-loop material recycling of sprues/runners that are discharged from injection moulding machines up to 500 tonnes clamping force. The WITTMANN G-Max series packs a lot of smart engineering into a very compact footprint in order to operate quietly and efficiently, grinding soft to medium-hard plastic sprues and defective parts.

 

The granulators of the G-Max series are driven by a Poly-V belt transmission. Self-pre-tensioning belt drives ensure much more adaptability to all applications when grinding sprues and runners. The high torque of the rotor and a solid flywheel provide more cutting power for smooth, steady, and reliable operation when processing parts with cross-sectional thickness.


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The Poly-V drive is the best solution for protecting the motor when overload conditions occur, and it provides excellent cushioning when the granulator is in start-up mode. The belt drive absorbs stress and vibration during operation, thus reducing wear and preventing damage – an essential advantage when compared to a gear box and a gear motor. In addition, the belt and pulley operation is much quieter than a gear-based motor.

 

The belt drive is a maintenance-free system and provides high energy efficiency, ensuring the highest quality of the finished product at low operating costs. Downtime caused by preventive maintenance and the need to adjust the belt tension are completely eliminated.

 

A worn or loose belt can decrease cutting efficiency, and belt slippage can also lead to frequent granulator jams and can increase energy consumption. Regular checks on conventional belt drives are necessary in order to guarantee continuing and proper energy transmission from the motor to the rotor. WITTMANN’s choice of solid rotor pulleys leads to a very cost-effective solution, achieving better cutting force without adding motor power.

 

And for small beside-the-press granulators, only WITTMANN is able to offer a belt drive with an automatic tensioning system.

 


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