Kleben +
Dichten +
Vergiessen
Our expert knowledge
We know where the trouble lies and work together with industry-related service centres to bring you closer to the advantages of adhesive bonded laminated cores (rotor or stator) compared to conventional commonly used methods:
- Enhanced geometrical and electromagnetic properties
- Improved stacking factor due to thin adhesive layer
- Reduced electrical losses
- Reduction of eddy currents
- Integration in punching process possible
Your benefits
- Freely accessible technology for every producer of laminated cores - easy in-house realisation
- Low investment due to possible integration of adhesive application unit into already existing production lines
- Adhesive stacking technique meets the increasing requirements for the production of high-efficiency motors versus commonly used technologies
- Increase of motor efficiency up to 3 %
- Reduced scrap rate due to reliable part quality
- Practical product development with the help of a technical centre punching line
Why magnets are bonded
Bonding offers a stable and permanent connection option that prevents the magnet from moving or coming loose. In contrast to mechanical fastening (stapling, pinning or pressing), there are no stress peaks that could damage the brittle magnets. Bonding protects the magnet from mechanical damage or corrosion.
Especially where magnets have to be fastened in pockets/slots, there is a risk that they will vibrate, slip out or be pressed so hard that they break due to poor dimensional accuracy.
Adhesive bridges gaps and holds the magnets in position permanently to prevent vibration and noise.
Challenges
It is difficult for users to make the right choice of adhesives for the following reasons: The different applications, such as
- shell magnets in housings or on shafts
- flat magnets on the circumference or in pockets/slots of rotor packs
- ring magnets in housings
and the various magnet qualities like
- ferrite
- plastic-bonded ferrite
- phosphated ferrite
- nickel-plated ferrite
- galvanised ferrite
- epoxy-coated ferrite and
- various nedymium qualities
which have to be bonded to steel, galvanised surfaces, nickel-plated surfaces, KTL-coated surfaces or the corrugated profile of laminated cores. Especially because continuos temperature influences of ≥ 150°C must also be taken into account.
This is where Kisling can support the user with its many years of experience as an advisory partner.
In addition to the adhesive selection, adhesive dosing is also an important point in the process chain.
A question asked often by our customers: How do I get the right amount of adhesive in the application in the right and time? This is where the Kisling team helps with its expertise and, if necessary, adapts the flow behaviour and curing properties of adhesives to the bonding geometries and processes.
Kisling provides expert advice on dosing technology, establishes contact with suitable dosing equipment manufacturers and supports you through all projec phases.
