Drive solutions for extrusion machines

Baumüller offers energy-efficient direct drive technology for extrusion machines. With this technology you can minimize drive losses, reduce background noise during operation and increase the reliability of the machines. At the same time, the lack of gearing means a smaller size for the machines, which can be designed more compactly.

For special ambient conditions, such as powder processing or production in high humidity regions, water-cooled motors can be used.

Topology

Application example: Shock detection for extrusion machine:

“The extruder is the most important machine in a complete extrusion line. For many years, I have seen numerous extruder screws that have been damaged due to operating errors. Unfortunately, the automation system cannot stop the machine before the screw is damaged. Baumüller was the only company that took this problem very seriously and decided to develop the "shock detection" solution for our industry. Baumüller relies on a special drive system with drive intelligence that monitors the drive parameters within the microsecond range. This allows us to stop the machine in time."

Dr. Abdullah Demirci, Deputy Technical Director at Mikrosan

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Benefits of the electric drive and automation

Extruder drive

High energy efficiency, even within the partial load range
Coaxial structure for dosing unit enables a compact machine construction even with multi-layer processes
Intelligent “screw relaxing” controller function: Torque dissipation before switching off the extruder to protect the mechanics
Sensorless operation of synchronous and asynchronous motor
Field-oriented control for high torque accuracy
Optional: precise control for material feed of the extruder screw by servo drive technology

Automation & technology functions

Extensive libraries included for machine functions, for example, exact and dynamic temperature control of the heating elements for energy saving
For the networking and control of machines and machine modules
Enables complex data analyses
Software for IoT functionalities are implemented
OPC UA module ensures the interoperability at the machine level

Visualization

Powerful hardware
Display sizes from 7” to 15.6”
Extensive, integrated software package
Classic or web-based visualization

References:

Intelligent drive functions for the plastics industry

A particular strength of the Baumüller Group is Drive Intelligence: The integration of numerous functionalities directly in the servo drive.

Integrated protection function for extrusion

Spindle/screw relaxation function

Application example: Extrusion machine

The problem: The extruder screw is very long and thin. It is turned constantly in a single direction and runs like a clock spring. The screw is distorted. As a result, there is a large impact when the extruder is switched off, and the extruder relaxes. The impact can have a negative effect on the bearing.

The solution: Before the extruder is switched off, the “spindle / screw relaxing” controller function switches off the torque via a ramp, so that the screw does not spring back suddenly. The converter reduces the current (= torque) within a few seconds and only then does it switch off.

The benefits: Gentler torque reduction to reduce the impact on the mechanics

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Plastics

Extrusion - Injection molding - Calender - blow molding - thermoforming - blown film machines

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