Quality improvements in the painting process achieved with ProMix 2KS

EMB can look back on more than 45 years of experience in the production of Buchholz relays for transformers, monitoring relays for tap changers, and other protective devices for liquid-cooled and liquid-insulated equipment.

During this time, EMB (formally Elektromotoren und Gerätebau Barleben GmbH) has developed into one of the most prominent manufacturers in its sector. EMB specialises in the development, design, production and distribution of transformer protection equipment and electronic ballasts for rail vehicle manufacturing, and in the production and distribution of special drives for use in the following areas: transport, energy technology, mechanical engineering, plant engineering and aerospace.
 

Optimising the coating process

Two ProMix 2KS systems were installed:

• one 2KS for the EP prime;
• one 2KS for six paints and a hardener for the topcoat lacquers.

The paints are supplied by 1:1 Triton double diaphragm pumps, and compressed air tanks with dried air are used ot supply the hardener. Now quick colour changes are possible using the ProMix 2KS proportioning and mixing systems. The use of the ProMix 2KS systems ensures precise mixing ratio compliance and very homogeneous mixing of the two components.

The ProMix 2KS proportioners are equipped with ProXp 60KV Airspray electrostatic spray guns.

Quality improvements

In the past, the two-component coating materials were mixed by hand and applied with air-assisted spray guns.

Use of the Graco ProMix 2KS and the ProXp electrostatic spray guns yields an immediate reduction in paint and solvent consumption and naturally allows achieving better quality.

The quality improvements are achieved by:

• reliable proportioning of the two components;
• homogeneous mixing of the two components;
• precise monitoring of the mixing ratio and pot life;
• easy colour changes; 
• fine atomisation of the coating material by the ProXp electrostatic guns;
• reliable operation of the supply pumps.
   

Moreover, set-up times are eliminated by continual premixing of the components and intelligent rinsing programs reduce paint and solvent usage. The electrostatic coating results in lower paint consumption, less booth overspray and better quality.

MORE INFORMATION

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