Service is a top priority for us
We will work with you to develop the best and most economical coating solution for you.
Technical advice
Our experienced sales team will be happy to provide you with advice and assistance in all questions relating to coating.
From the optimum design of your component to be coated to the selection of the optimum coating material for your requirements, we will support you throughout the entire process chain.
Our test methods
The following test methods and test procedures are used in our company:
DIN EN ISO 2360
DIN 55670
DIN EN ISO 12944-4
DIN EN ISO 8502-9
DIN EN ISO 8502-11
ASTM D3359
ASTM D4541
VDE 0400-20
Our capacities
In three separate production halls, we have eleven coating systems with stoving and sintering ovens of different sizes, which can cover a maximum temperature range of up to 500°C, for coating your workpieces.
Pre-treatment
SANDBLASTING
Sandblasting is the pre-treatment of the surface of a workpiece by using sand (corundum) as an abrasive to remove rust, dirt, old coatings, paint and other impurities. This process is used to optimise the pre-treatment of the workpiece for the coating process. The abrasive, in this case corundum, is applied to the surface to be treated under high pressure via a special hose and nozzle system. Due to the abrasive effect of the corundum, parts of the surface are loosened and ultimately removed, resulting in a clean surface. Hüni+Co has various blasting systems on which we can process workpieces of up to 10 metres in length with corundum of various grain sizes for you. Blasting with corundum according to DIN EN 12944-4
GLASS BEAD BLASTING
Glass bead blasting is a similar method of pretreating the surface of a workpiece to blasting with sand or corundum. However, small glass beads are used here, which are significantly finer and therefore produce a finer surface. The special thing about glass bead blasting is that it achieves a plastic deformation, which creates the desired internal stress in the workpiece and thus significantly increases the fatigue strength. This is why it is often referred to as shot peening. With glass bead blasting, the surface is less roughened than when blasting with sand or corundum. The more filigree the glass beads, the finer the surface structure, right up to a polishing effect.
DECOATING USING THE PYROLYSIS PROCESS
Pyrolysis is a pyrolytic decomposition process. In a thermal process, without the addition of oxygen, chemical compounds are broken down; large molecules are converted into small molecules. Colloquially, pyrolysis also means burning or incineration. In the case of plastics, the matrix is destroyed and they disintegrate. In coating technology, pyrolysis is an upstream process when workpieces with an old coating are refurbished, i.e. recoated. We offer pyrolysis as a possible decoating process for the pre-treatment of your workpieces.
THERMAL DEGREASING
A grease-free surface is an essential condition for the substrate adhesion of coatings and other surface finishes. In addition to chemical degreasing, thermal degreasing is also used for this purpose. Substances such as oils and greases burn at high heat during thermal degreasing. The residues produced during the process would reduce the substrate adhesion of a coating and are therefore removed, e.g. by radiation.
Glossary
In our glossary you will find a short and concise explanation of many relevant keywords from the world of plastic coatings.
The aim of the glossary is to provide a general introduction to topics related to plastic coatings.
If you have any further questions, please do not hesitate to contact us personally!