Roller Application Machines

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Roller Application Machines

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TOMANIN VFT1T-2N Curtain Coater
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3,000 €
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Index

  1. Functions of a roller application machine
  2. From the lac insect to emulsion paint
  3. Standards and applications of coating processes
  4. Complete machines from industry
Used roller application machine general view

Functions of a roller application machine

A roller application machine is used to apply putty or primer on a workpiece to close up the pores on its surface. Rollers are used to apply and smooth out the layer of lacquer. The workpiece is guided over rollers or a conveyor belt. During the first operational step, the lacquer is applied using an application head. This usually contains an applicator roll covered in rubber and a dosing roll made out of metal.
  • Application of putty or a primer on a workpiece
  • Application is undertaken by rollers
  • Smoothing and protecting the surface of the workpiece
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The smooth coating head rotates in the opposite direction from the application head, which is why it's usually called the reverse head. Modern roller application machines dry the workpieces using the help of UV-rays, which reduces the hardening time and prevents the emission of harmful vapours.

From the lac insect to emulsion paint

The first lacquer was used in 5000 B.C. in China from the resin of lacquer trees. The secretions of the lac insect were dissolved when the trees were heated, and then as they cooled, they formed a protective layer. In the 18th century, various lacquers were produced at high temperatures.

ERNST + BÜRKLE + VENJAKOB Roller application machine in use
It was only discovered during the industrial age that lacquer has a protective function in terms of the preservation of the value of goods and buildings. The first waterproof lacquer was produced in 1837. New binding agents, synthetic paint resins and emulsion paints were developed in the 20th century. Today, developments are focused in areas such as the reduction of emissions and self-cleaning solvents or paints.

Standards and applications of coating processes

Coating processes are subject to the standard DIN EN 971-1. A coating of several layers should contain a base adhesive layer that covers unsightly surfaces and protects metals from corrosion. The second layer contains more pigment and acts as a filler to smooth out unevenness. The third layer is the coloured paint layer. Finally, the clear lacquer acts as a covering layer, to protect the workpiece against impact and wear and tear. Roller application machines are used to coat flat wood surfaces, fibre board and veneer technology. Other materials include cardboard, corrugated cardboard and foil, that are hardened on one side using UV-rays.
Used roller application machine paint applicator unit
The different parts of furniture are processed in coating lines. The machines allow for a constant reproducible quality at a low cost.

Complete machines from industry

Several companies have specialised in the manufacturing of roller application machines. Some of the most recommended suppliers include CEFLA Gruppe and SORBINI. In addition to roller application machines, Surplex.com has complete lacquering machines and coating lines available.


Used roller application machine detailed view
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