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Sanding plays a vital role in wood processing and production. It is used not only for thickness processing of engineered wood products and solid wood components, but also for fine sanding of veneers and paint films.
Types of sanders
Sanding machines are widely used processing equipment in both wood processing and furniture manufacturing enterprises. They are machine tools that use abrasives to eliminate surface defects in wood and play an irreplaceable role in the wood processing industry. Currently, there are many types of sanding machines on the market, but generally speaking, sanding is mainly divided into three types: roller sanding, disc sanding, and belt sanding.
Roller sander
Roller-type wood sanders use rollers wrapped with sandpaper to sand wood. They come in single-roller and multi-roller types. The contact surface with the workpiece during movement is arc-shaped, resulting in a wavy surface after processing. The processing quality is relatively poor, and they are mostly used for sanding the curved edges of large-format straight panels or ring-shaped parts.
Disc sander
Disc sanders use sandpaper (or cloth) that is tightly attached to the end face of a rotating disc to sand workpieces. They are available in vertical and horizontal models, as well as single-disc and double-disc models. When the sanding disc rotates, its center speed is almost zero, so only the edge of the sanding disc can be used for grinding. It is mainly used for grinding the edges, ends, and corners of workpieces.
Belt sander
Belt grinding is a high-speed, "micro-cutting tool" that combines the minute cutting action of abrasive grains. Due to its unique characteristics, belt grinding is an elastic grinding process that combines grinding, lapping, and polishing. This is why belt grinding produces higher quality results than grinding wheel grinding, and it also operates at a lower temperature.
Belt sanders have advantages such as high efficiency, guaranteed processing accuracy, and easy belt replacement. They are suitable for sanding large pieces of engineered wood, furniture boards, decorative boards, or boards before and after painting, and are the most widely used type of sander.
Application of sanding in solid wood door and window production
Sanding is a critical process that accounts for about one-third of the production time of wooden doors. Wooden doors need to be sanded between the raw door, each coat of primer and topcoat (generally at least two coats of primer), and the quality of sanding will directly affect the surface quality and effect of the wooden door.