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Automatic impregnation systems

As one of the world’s leading companies in the demanding field of the impregnation of electrical components, Meier Prozesstechnik can successfully look back on over 30 years of experience. With our proven system concepts and the customer-oriented innovations from our Meier Technology Centre, we serve as a guarantor of high quality and performance.

Based on decades of experience and continuous market surveillance, we are able to address the precise needs of manufacturers and repair companies, in both the low-voltage and high-voltage sectors. Our automatic impregnation systems are products of our customer orientation and market proximity.

Automotive

Electrification is continuously advancing in the automotive sector, resulting in competition for the internal combustion engine in the long run. Whether it concerns a pure electric drive or one of the many hybrid solutions, Meier Prozesstechnik offers the right impregnation system for it. Our strengths include the selection of the correct system concept along with production that is tailored to the special requirements of OEMs and suppliers.

Object oriented application

In the electrical industry, there are a number of electrical components, such as inductors, transformers, small drives and single coils. Whether it concerns vacuum impregnation, interior flooding in the housing or trickling with resistance heating, we can design the impregnation process to suit your requirements. We would be pleased to support you in the design phase of your components to enable the impregnation process to be optimally integrated into your production line.

 

Heating and hardening processes

Whether it is a matter of preheating, soaking or curing, the temperature of objects is always a dimension defined by the process when it comes to the impregnation of electrical components.

  • Conventional oven heating
  • Resistance heating
  • Induction heating
  • Infrared heating
  • UV curing

Since heating methods comprise a substantial component of our systems technology, these processes are continuously optimised and further developed.

Hot Dipping method

After the preheating of the component, it is dipped into a resin bath with a defined speed. Through the heating of the coil during the dipping phase, the impregnation medium can be gelled as early as this stage of the process. This achieves an increase in resin absorption and a reduction in draining losses. The surface condition after impregnation can be optimised by varying the dipping speed. Depending on the application, the process of dipping in and out may take place in multiple steps. Thanks to the flexibility of the dipping method, a broad spectrum of sizes can be covered.

Trickling method

With the trickling method, the impregnation medium is applied to the coil of the rotating component. Both the amount and the flow may be precisely controlled with the assistance of a metering device. The resin absorption may vary in terms of speed and ease. Optionally, the component may be heated during the trickling process, which can reduce the processing time and improve the quality of impregnation. The trickling method is optimal if only certain areas of an object are to be wetted with a medium.

Flooding method

For stators that are already in a housing prior to the impregnation process, the flooding process is particularly suitable. In the process, only the interior of the stator is flooded with impregnation medium, such that it is only impregnated where it is necessary. With this impregnation method, there is no residue on the outer shell of the stator housing.

Cleaning methods

After impregnation, drip streaks or the formation of bulges may result in the geometric dimensions being outside the specified limits. In order to provide for automated processing without manual post-treatment, we have developed various cleaning methods.

Compressed air cleaning

After the impregnation of the objects, the liquid impregnation medium is removed from the surfaces concerned with the use of compressed air.
In particular for compressed air nozzles designed for this application, it must be ensured that the objects are freed of drip streaks and other deposits.

Laser cleaning

Excess impregnation materials is removed with the use of a laser beam after the compoment has been impregnated and hardened.
The corresponding surfaces are cleaned with a laserbeam, such that the hardened impregnation medium can be removed without leaving any residue.


 
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