Painting Equipment

Electrostatic spraying of waterborne products safer with Sames Kremlin's ISOCUBE

Because it is a method that greatly reduces material loss, electrostatic spraying is an option for those who varnish or paint wood products. However, the association between water-based products and electricity scares many people away from this option in favour of less effective alternatives. Sames Kremlin proposes an insulating spray booth that eliminates the risk of accidental electrical discharge. With ISOCUBE it practically sets a new safety standard for electrostatic spraying.

electrostatic spraying

Electrostatic spraying, one of the most cost-effective application methods

I don't think I'm telling you news when I say that manual spray losses can be as high as 60, even 80%. I've been in factories that finish products with atypical geometry and where varnish is consumed more than double the finished surface. The losses were very high which automatically led to a high product cost.

Even with hand spraying there are systems that considerably reduce losses, the material transfer on the surface to be coated reaches over 90%. One of them is electrostatic. The system is based on the different electrical charge between the lacquer/paint particles and the object to be finished, the particles becoming attracted to the surface to be finished. The attraction is very visible when a paint is applied. Although spraying is done by holding the gun in front of the object, the paint will also settle on the back of the object, the amount of particles left in the air becomes negligible.

Reluctance to use electrostatic spraying for water-based products

With all this very good efficiency, the existence of electricity makes many reluctant to use the system, especially for water-based products. Working directly with a gun that electrically charges lacquer particles is not comfortable for many operators.

Automated electrostatic field application systems used in factories have safety systems that interrupt the power supply within nanoseconds if a problem occurs. The workplace is very well organised so that the electricity does not reach the containers or hazardous areas. Concern for the safety of the production process is very high and time has shown that the investment in safety pays off. Sames Kremlin, which supplies furniture manufacturers with more than 30% of electrostatic spraying systems, says they haven't had any incidents over the years which has led to increased customer confidence in their products.

We need the same safety in manual application and systems that inspire confidence in operators. This is what Sames Kremlin achieves with ISOCUBE, the cab that takes operator safety to the next level.

Who it is for, what it is and how it protects ISOCUBE

The system is aimed at workshops, small and medium-sized factories or anywhere manual electrostatic spraying of water-soluble or non-flammable products is used. It is very useful where multiple colours are used because the changeover is quick and safe.

ISOCUBE is an insulating booth for paint containers. Due to the conductivity of the water, the current electrically charges the entire quantity in the container (bucket) and therefore it must be as well separated from the operator as possible. The booth is made of polypropylene and is designed to prevent paint spillage, to be easy to install and access and to be easy to clean. It is grounded so that it can drain the residual current.

With ISOCUBE insulation from the sprayer is perfect and safe. Power to the system is interrupted when the finger is taken off the gun trigger or the cab door is opened. At the same time, the residual energy is automatically discharged to earth.

The electrostatic guns accompanying the booth can be Nanogan Airspray or Nanogan Airmix.

electrostatic spraying

ISOCUBE performance

ISOCUBE is simple to use and operate. The advantages of using the cab are:

  • protects the sprayer very well, the risk of the sprayer coming into direct contact with electrically charged material is completely eliminated;
  • reduces maintenance costs for the whole system;
  • enables fast colour changeover with safety and without production interruptions;
  • easy to handle with the control panel on the front of the cab;
  • easy to install and maintain.
Safety first

I mean, safety first. I got used to the expression years ago, when I worked in a multinational. No matter what event was taking place, even if we were just gathering to look at some graphics on a wall, the first time was this "safety first". At first I treated it with superficiality being convinced that it was made to absolve someone of any guilt. With time I realised that whether or not it was someone's job to do, my life was important and I had to do whatever was necessary to protect it. Like when you cross at a crosswalk on a green light, but you make sure first. Yes, it's my right, but my life is far more important.

That is why I think such an initiative is important. I am convinced that electrostatic field application guns had some safety systems in place before. And I know that they could also be used with water-based products. But any system that increases the safety of those involved is very welcome. It can save a life and that is really important.

electrostatic spraying

About the author

Mihaela Radu

Mihaela Radu is a chemical engineer but has a great passion for wood. She has been working in the field for more than 20 years, wood finishing being what defined her during this period. She gained experience working in a research institute, in her own company, as well as in a multinational. She wants to continuously share her experience with those who have the same passion - and more.

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