Innovative stack production for greater economy and sustainability
Revolutionary difference: The novel process control of toptyte® PROCESS with pulsating compaction and individual hardening enables the production of media-tight stacks that herald a new era in terms of tightness, efficiency and sustainability. This means that even more powerful and efficient motors with integrated cooling can be economically produced in series.
voestalpine new business incubator (nbi)
The new business incubator is the innovation hub of the voestalpine Steel Division. Based on material know-how, technologies for the production of next-generation electrical steel packages were developed in close cooperation with industrial partners. The focus is on Backlack and dot bonding solutions with regard to media tightness, serial capability and sustainability.
toptyte® Backlack
100% media-tight electrical steel stacks through dynamic process control
The dynamic toptyte® process is based on the principle of pulsating compression with simultaneously increasing heat. The electrical steel laminations are pressed together by means of short pressure pulses and increasing temperature until absolute tightness is achieved. Tightness is monitored inline before curing, thus minimizing scrap.
The full-surface bonding of the laminations and the dynamic toptyte® process enable the production of media-tight electrical steel stacks for high-performance motors where cooling channels are integrated directly into the rotor and stator.
The advantages:
- Short cycle times due to continuous heating and reduced cooling time
- Economical production based on tightness testing and scrap down to nearly 0%
- Reduced carbon footprint through resource-efficient production with lower demand for the rare-earth metal dysprosium
toptyte® Backlack hot-embossed
Optimal technology for media-tight rotor stacks – for the highest tightness requirements in high-speed electric motors
The electrical steel coated with Backlack is hot-embossed during the processing stage before bonding. Depending on the system configuration, hot embossing takes place either before stamping or in a combined step with the stamping process. Thanks to the embossed pattern in the Backlack around the cooling channel openings, media-tight bonding is ensured even with narrow web widths.
Hot embossing around the cooling channel openings creates a surface structure in the Backlack that enables media-tight bonding even with the narrowest web widths.
Advantages of toptyte® Backlack hot-embossed
- Media-tight stacks even with narrow web widths
- Economical large-series production
- Easy to integrate into existing production processes
toptyte® Dot bonding wet-embossed
Embossed surface structure for controlled point bonding
In the course of the factory C5 wet coating, a fine structure is embossed onto the electrical steel. This functional surface structure ensures that the adhesive drops spread precisely during bonding, resulting in a controlled, clean, and secure bond.
Electrical steel stacks in economical production
The combination of a standard process, standard coating, integrated structure and process-reliable production is a highly efficient solution for series and large-series production.
The advantages in a nutshell
- Fully pre-treated base material with factory-applied embossing in C5 wet coating
- Controlled adhesive distribution, allowing for a smaller distance between the glue dot and the web or outer edge
- Number of glue dots per lamination can be increased
- Stack production possible without equipment adaptation
Please contact us!
We look forward to collaborating with you to shape e-mobility in an efficient and sustainable way.