Food - RHV Technik

Food

Industries

Surface coating in the food industry.

Thermal coatings in equipment and systems in the food industry.

Where food is produced and processed, machines, equipment and processing systems must meet high requirements. Where surfaces come into contact with food, chemical resistance is one, if not the most important requirement for the material.

Thermal surface coating in the food industry is therefore a must in many areas.

Bearing seats and sealing seats on distribution shafts of filling lines are often coated with a ceramic in the form of chromium oxide and then mechanically processed. As a result, the surface receives the required quality and achieves dimensional tolerances of up to a few micromillimetres.

Cutting knives are given a sharp cutting edge by being coated with carbides and become more wear-resistant than uncoated knives due to the thermal coating. In addition, they then have a high fracture toughness.

 

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Martin Dauner, Leader F+E and laboratory

 

 

Welding tools and sonotrodes can be made conductive with a special ceramic. This makes the tool contact surface with the film even more wear-resistant and the service life is significantly increased.

In the food industry, however, not only wear and tear plays an important role. It is also the so-called corrosive attacks of the conveyed media that have an enormous effect on the component surfaces. For example, sealing seats on distribution shafts in filling systems are exposed to a wide variety of media that have a very strong effect on the material. In order to noticeably extend their service life, they are therefore often coated with a ceramic such as chromium oxide or a carbide such as chromium carbide and then polished.

This is where thermal coatings are used in the food industry:

Bearing seats | Sealing seats | Cutting knives
Distributor shafts | Pumps | Welding tools

Antimicrobial surfaces for the food industry.

Together with the ZIM innovation network, Antimik, we are working on coating materials and processes that enable antimicrobial surface coating by thermal spraying. The production of food requires a lot of the materials used, e.g. high and low temperatures as well as rapid temperature changes. Materials must be cleaned and sterilised using conventional methods while remaining resistant to ageing. Where conventional materials reach their limits, antimicrobial surfaces are intended to provide even more protection against microorganisms and germs.
Together with other partners, we are researching coating solutions that are as valuable and expedient for the food industry as they are for applications in medical technology.
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