High-pressure spray nozzles

put to the test

Research using laser, acoustic and scanning electron microscopy: Together with our research partners and in collaboration with Münster University of Applied Sciences, we are investigating the spray behaviour of high-pressure nozzles in order to make them more economical and better for the environment and human health.

Read the article from Münster University of Applied Sciences

Figure B – Sonic two-phase nozzle
Figure B – Sonic two-phase nozzle for applying solvents in edge-banding machines

Optimisation of industrial spraying processes

High-pressure spray nozzles with room for improvement

In modern industrial manufacturing processes, high-pressure spray nozzles are used to apply dyes or cleaning solvents precisely to products. This process offers considerable potential, particularly in the areas of research and development, optimisation and maximisation of efficiency, sustainability and occupational safety. As the service life increases, the nozzles wear out, which can lead to a deterioration in the spray pattern and performance. At the same time, there is a growing demand in industry for new spraying agents that are more environmentally and health-friendly than conventional solvents.

Network-based research

Interdisciplinary research project at Münster University of Applied Sciences

Against this backdrop, an interdisciplinary research project at our partner university, Münster University of Applied Sciences, is investigating the spray behaviour of nozzles in industrial applications. The project involves lecturers and students from a strong network spanning academia and industry, supported by our board member, materials physicist Dr (Aus.) Heiko Timmers. The aim of the project is the data-driven optimisation and maximisation of spraying processes, as well as the development of new solutions for more economical and sustainable applications.

Technology Campus of Münster University of Applied Sciences in Steinfurt

Partners from academia and industry

Development, application and prospects for patents

The team at Münster University of Applied Sciences is carrying out the project in collaboration with Michael Karau, a graduate engineer from FSG Schäfer GmbH. The nozzles and solvents we have developed are being used in the project. The findings will make an important contribution to research and development and may, in the future, also lead to innovative processes, technical advancements and patents.

“For us as a medium-sized company, this project at Münster University of Applied Sciences is invaluable and a fine example of how theoretical concepts can be put into practice.”

Laboratory research

Three work packages for the analysis of spray nozzles

The research team has divided the project into three specific work packages. Using a test rig in the Laboratory of Materials Physics, the team is investigating the exit velocity of the nozzles. To do this, the sound spectrum generated during the spraying process is recorded using a microphone, analysed, and used as the basis for calculating the flow velocity. In the long term, this approach is also intended to automate the manual inspection of the nozzles. In the future, software could detect whether nozzles are blocked or misaligned, thereby contributing to the further optimisation of the spraying process.

Technology Campus of Münster University of Applied Sciences in Steinfurt

Precise measurement in a research project

Laser scattering method for analysing the spray pattern

In addition, the team measures the spray velocity using a different method. In the laboratory, laser scattering is used to determine how fast the droplets emerge from the nozzle and what shape the resulting spray cone takes. To do this, high-speed stroboscopic images are captured, which allow even the smallest time intervals – in the order of millionths of a second – to be determined with precision.

Laboratory research

Optimisation through scientific analysis

The foundation for quality, control and optimisation

Precise velocity measurement provides important insights into the quality of the spraying process. This allows deviations to be detected at an early stage and targeted measures to optimise the nozzles to be implemented. The research project at Münster University of Applied Sciences thus establishes a scientifically sound basis for making industrial spraying processes more efficient, precise and cost-effective in the long term.

Technology Campus of Münster University of Applied Sciences in Steinfurt