The installation of painting facilities is a complex and, in most cases, very customer-specific issue. Their single components are agitators, pumps and lifting stations, all varying in number, characteristics and construction. PTM develops and manufactures such machines according to the requirements of its customers with its long-term practical experience. We know that painting facilities only become effective and intelligent by use of an appropriate control:
Hitherto, the controllability of stirring processes is a challenge. However, it is essential for a perfect stirring result.
Not only varnishes but also a large number of other liquids do not only consist of one single ingredient. It is more likely that a number of ingredients is mixed like, for example, binders, pigments, oils, resins, fillers, additives and solvents in the case of varnish, all influencing its adherence, colour and viscosity.
Such substances have to be stirred before use to avoid the splitting in their individual components. The stirring process is influenced by different aspects, which have to be controlled. The non-observance of those aspects can lead to a poor agitating result. Those aspects are:
Viscosity of stirred substances
The viscosity of the substance stirred can change during the stirring process. With regard to varnish, solvents are the volatile component. They evaporate. The viscosity of the varnish gets more and more viscous. After filling up some solvent, it gets liquid again. The questions are now: How can viscosity be measured? Moreover, how much solvent has to be refilled to get the perfect viscosity again?
Filling level inside stirring tank
The filling level inside the stirring tank can change due to the evaporation of ingredients. Additionally, it is likely that some content is taken out, for example by a suction lance, or refilled. The filling level influences the rotation speed of the agitator significantly. The taking out of contents, for example, reduces the resistance at the stirrer elements. The speed increases unintentionally. Foaming can be a possible result due to the intensive stirring.
Speed of agitator
To adapt the speed of the agitator to changed conditions, it has to be measured precisely and controlled reliably.
Air consumption of agitator
Depending on the application, an agitator needs more or less compressed air. There are also major differences between the different types of agitators, the energy-intensive vane motor and the economic radial piston motor as an example. The measuring of the air consumption can yield considerable savings potentials.
Programming of timetables
Some substances do not need a constant stirring. It could be sufficient to stir them shortly before use. Consequently, there are stirring breaks, for example at night. To be able to utilise them to save energy and costs, stirring processes and stirring breaks have to be programmable.
All these aspects need an exact measurability and controllability. Therefore, PTM mechatronics develops a central control, the eco-Control. On the one hand, it analyses all the necessary data reliably and, on the other hand, enables the exact control of all parameters. Due to the use of common interfaces, the control can easily be integrated in every higher-level process automation to receive regular status and feedback reports there. Stirring processes are no longer intransparent but systematised, controlled and secure.
We gladly develop your painting facilities according to your individual requirements, intelligently connected with an appropriate control and functionally secure according to ATEX guidelines. Our experts are looking forward to advising you: +49 8134 25 797 0 or email@example.com.
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