Purpose of the sanding in the woodworking industry is the improvement of the surface quality. It enables the user to give the work piece the requested shape and achieve a high surface quality. Important for the quality of the sanding result is besides the right sanding technology especially the professional equipment. Depending on the requested result sanding units with different features are used.
Furthermore consumables as for example sanding belt, sanding papers, Velcro abrasives and abrasive sponges for a high quality are indispensable.
Numerous applications for wood sanding are possible. The range of application includes sanding of worn floor, professional manufacturing of high-quality furniture pieces and mending of scratches in wooden staircases. While smaller wooden work pieces are mainly sanded manually, for larger surfaces usually sanding units are used. Irrespective of this it is important to decide for the appropriate grit when purchasing sanding paper. The grit provides information on the distance of the sanding grits arranged on the sanding paper and finally decides the sanding fineness. For example, sanding paper type P80 is not as fine as the P150 variant.
Sanding requirements for various demands
Technical details of sanding units
Depending on application and requested sanding result different sanding units can be used. Furniture production usually requires cross sanding units and longitudinal sanding units differing with regard to the sanding direction.
The cross sanding unit processes the wood surface cross to the fibre direction and is particularly suitable for the prepared rough sanding. Fine sanding, however,
should be preferable made by a longitudinal sanding unit in order to prevent cutting the fine wood fibres contrary to the their natural alignment. Cross sanding units are also used in the lacquer sanding area, for example for high-gloss surfaces, especially when you work with very high sanding grains.
A calibrating roller is particularly suitable for industrial productions and can be used for sanding of solid wood to a required thickness. This machine type is often combined with the advantages of a longitudinal sanding unit as a combination unit. Combination units can make in a first step the rough cut of a work piece and following ensure the requested plan and fine sanding.
Brush sanding units furthermore allow a very even and intensive processing of wooden surfaces. The brushes rotate on axes mounted horizontally to the surface and remove shavings very evenly.
Special procedures in the wood working
There is a whole range of examples of sanding procedures, which differ with regard to the surface quality to be realized and the fineness of the sanding. The focus of solid wood sanding or calibrating of wood parts is to get the work piece in the required dimensions. Surface quality and roughness are of secondary importance at this procedure. Veneer sanding is especially used at veneer surfaces and ensures that the sensitive and thin structure of the veneer is not damaged. Usually veneer is only a few millimeters thick and should be sanded with extreme caution. The purpose of lacquer sanding or lacquer intermediate sanding is the processing of lacquered surfaces and the creation of an even and smooth surface finishing. High-gloss sanding is usually the last step in the sanding process and places highest demands on the grain of the sanding paper. Normally very narrow grains up 320 are used here.