Technologies for full circle cuts: Fully automated bonding varnish (Backlack) lines

We developed EPS® technology for the industrialization of stator and rotor production with bonding varnish (Backlack). The bonding of stators and rotors from individual laminations is linked to the punch. SWD bonding technology is fast, accurate, and traceable.

Fast and precise bonding of lamination stacks

EPS® technology – an SWD innovation – has already been used several times for our customers on entire production lines. The system is based on our bonding varnish (Backlack) expertise and enables the fast and precise bonding of lamination stacks. Thanks to very high process control and digitization, we continuously optimize the processes in our solutions. The bonding process runs synchronously with the punching press.

Bonding varnish (Backlack)

Find out how you can increase the performance of your electric motors and reduce the use of materials with advanced bonding varnish (Backlack) technology – fast bonding in minutes. Our tried-and-tested process promises maximum precision and process reliability.

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Increased efficiency through pre-stacking

The punched individual laminations are pre-stacked to achieve fast and precise bonding of lamination stacks. Pre-stacking includes:

The right order of the laminations
The rotation of the laminations to compensate for the wedge shape and magnetic direction
The right height of the lamination stack

The pre-packed laminations are then bonded in the shortest possible time using EPS® technology.

Tolerance reduction through process tuning

To reduce tolerances as much as possible, the punching sequence and the bonding tool are precisely coordinated. This ensures the smallest possible tolerance in the core geometries.

What our employees have to say:

“With our EPS® technology, we bond stators and rotors in the punching press cycle.”

Edgar Lemp

Support & Service

In contrast to conventional bonding in an oven, you benefit from the following advantages:

Optimized bonding technology

Precise, fast, always identical, recipe-controlled bonding process.

Process reliability and traceability

Maximum process reliability for bonding and 100% documented traceability.

Improve the stacking factor

The stacking factor can be improved by precisely coordinating the bonding varnish (Backlack) layer thickness, the degree of pre-curing, and the controlled bonding pressure.

Minimize stacking errors

Safe and precise alignment of the laminations thanks to thermal calibration – thus reducing stacking errors.

Lower tolerances

Coordination of the punching process, punching sequence, and bonding tool – this allows tolerances to be reduced.

The same tools and equipment

Processing of different raw materials and bonding varnishes (Backlack) without adjusting bonding tools and equipment. Only the bonding recipe is matched to the raw material.

Reduce energy consumption

Lower energy consumption compared to furnace systems, as the laminations are heated directly. Reduction of the carbon footprint.