samt und sicher

Powder coating

POWDER COATING
on steel, aluminium, or zinc

We will coat a variety of materials and surfaces for you:
Steel and aluminium workpieces - galvanized or already-coated parts.

Large part coatings in multiple -shift operation

  • Workpieces up to 13m long, 3.5m high and 2.5m wide
    and with a unit weight of up to 4 tonnes
  • Material thicknesses up to 80 mm
  • 1,800 m² covered storage space, in which your
    parts for coating are protected from wind and weather
  • fully automatic washing system
  • large powder store with approx. 150 different powder coatings

We coatfences, fire protection windows and doors, welded constructions and machine components of all kinds.

Clean and imprint-free coating

We can create the ideal surface for subsequent coating with a safe process using our fully automatic wash system:

  • A lot of experience in powder coating according to DIN 55633
    from lots of contracts from Deutsche Bahn
  • almost no imprints from suspension
    thanks to special suspensions
  • Sand blasting & sweeping work

  • flexible pick up times from 06.00-18.00
    and by arrangement

CO2 neutral coating

We manufacture your components in an environmentally friendly and CO2 -neutral way.
Our powder coating furnace is 100% wood-chip fired and is among the largest wood chip furnaces in the whole of Germany. We cover our energy use with our own feed-in via our photovoltaic systems.

 

 

Your piecework-powder coater from East Bavaria.

Smooth processing of orders

The following details are important for your enquiry to the finishers and the subsequent order
for smooth processing of the order:

  • Colour
  • Surface structure
  • Degree of sheen
  • Load group
  • Appearance of the surface
  • Intended purpose
  • suspension points
  • visible surfaces

Visible surfaces can, for example, be easily shown on an order sketch with a dotted line in front of the visible surface.

Pdf-Downloads

How does powder coating work?

Plastic powder is electrostatically sprayed and adheres to the workpiece. In the subsequent heating of the objects to approx. 200°C, the plastic powder melts and merges into a decorative and long-lasting surface coating. Examples of this are machine housings, steel profile frames, H and I steel girders, collection tanks, fence systems etc.

There is a special powder type for each application

Powder varnishes consist of a binding medium, a colour pigment and bulking agents. The binding agents contain an artificial resin component (acrylic, epoxy, polyester or polyurethane resin) and a hardener, which only react with each other after application when the work-piece passes through the curing furnace. This causes an increase in the size of the molecules within the binding agent system, which creates the resistant varnish film.

Powder store Haslinger Dienstleistungen GmbHThe varnish powder used transforms into an even duroplastic layer of about 50 – 80 µm. The type of powder used depends on the intended use. The most common powder types are epoxy, polyester and epoxy-polyester mix powders. Less common systems consist of polyurethane, acrylic and polyamide resins. We always have a great selection of different types of powder in stock.

Electrostatic charging of the powder finish

The high voltage at the tip of the jet (electrode) is generated by the integrated voltage multiplier in the body of the pistol. An electric field with voltages up to 100kV (100 000V) arises between the earthed work-piece and the electrode, which transfers a negative charge to the individual varnish particles. As the varnish particles repel each other on the way from the spray pistol due to their like charges, they are distributed in a fine uniform powder cloud and fall evenly onto the earthed work-piece. Particles of varnish that fly past the work-piece are still held in the electric field and fall on the rear side of the work-piece. The small current that is thereby generated is conducted away through the earthed work-piece.

Vortex sintering

Vortex sintering is another less commonly used type of coating. In this, the heated work-piece is held in a cloud of plastic powder so that the powder then melts on the hot work-piece. Thermoplastic powders are mainly used in this process. Greater coating thicknesses are possible with this process. Examples are garden furniture, wire baskets for washing machines etc.

Save costs with construction suitable for coatings

Here are some construction examples that should help you to prepare your parts suitably for powder coating even in the CAD.
The most important thing here is that the finisher can suspend the parts without affecting the later visible area.

Do not forget the suspension holes!

For light workpieces up to 2kg in weight, these can have a diameter of 3 – 4 mm, for larger work-pieces, these holes must be at least 5 – 6 mm. The holes should be
on the outer edge.

In some cases, no holes are required, if there are indentations by which the workpieces can be suspended. Several holes will need to be made along the length for long sheets with no stabilising bends. If possible, provide the same hole pattern on the lower side. Other sheets will then be suspended by these holes, to utilize the space available in the coating system effectively and thereby saving costs.

If no small holes can be present on the work-piece, we recommend making the raw pieces a little larger and then remove the unwanted suspension holes after coating.

Paints for industrial coating

In the main, RAL-colours from the colour collections RAL 840-HR and RAL 841 GL are used in industrial coating. RAL-colours are industrial standard colour tones and can thus be obtained cheaply at short notice. Along with "classic" RAL-colours, there are alsoother colour systems which can be used to define the colour definition:

  • RAL Design (System for intermediate colour tones)
  • RAL F (camouflage colours)
  • NCS (Natural Colour System)
  • British Standard (British colour system)
  • Sikkens (Construction varnish and paints)
  • HKS (inks)
  • Pantone (colour palette for materials)
  • DB-paints.

These colours are not normally available from the warehouse and are only produced on customer request. For appropriate quantities, colour mixtures according to your own template are also possible.

Powder coatings in contrast to liquid coatings, cannot be mixed by the finishers themselves, and have to be produced by the manufacturer. This requires ordering a minimum quantity and can be costly and time-consuming. Together with these colours, there is a range of special colours such as metallic- colours, mineral glimmer colours, sanitary hues, transparent colours etc. Many colours are available in different degrees of sheen and in various surface structures.

Metallic colours and DB-colours (special cases RAL 9006 + 9007)

Although these colours may be included in the RAL colour card, it is possible that they still do not match. Each manufacturer offers various types of the named colour which leads to colour differences. It is a good idea to manufacture sample panels and precisely define the article number of the desired colour. If possible, the colour used should all come from the same batch and the same object should be treated by the same finisher if possible. Only then can an optimal outcome be ensured. It can happen with the colours named above with metallic components that a 100% even colour effect over large areas is not always achieved. These variations in tone, or shadowing, occur particularly when a work-piece is a combination of different part geometries. Combinations of liquid coatings and powder coating on the same object must be compatible if this is even technically possible. Metallic coated surfaces are therefore designated as so-called living surfaces.

It is not just the right colour that is important to the finisher, but also the subsequent intended use. Using the necessary information, the finisher then determines the quality of the powder.

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