Knowledge of Using Abrasive Belt

Sanding process has the characteristics of high production efficiency, good surface quality and low production cost, so it has been widely used in furniture production.The final surface quality of furniture products is closely related to the sanding process. The abrasive belt is the main tool of the sanding process. We often encounter problems such as how to choose the right abrasive belt, how to prolong the service life of the abrasive belt, and how to further improve the smoothness of the products in sanding process.

With the development of science and technology, the abrasive belt base, the abrasive type, the production technology of the abrasive belt, and the binder of abrasive are continuously improved.

1. How to choose the right abrasive belt?

The China abrasive belt is a strip tool bonded by abrasive to flexible materials such as paper and cloth. It is used for grinding and polishing. The abrasive belt is composed of substrate, abrasive and binder.

The base of the abrasive belt used for furniture production is made of cloth or paper. The paper abrasive belt base is made of specially treated high-strength paper. The price of paper abrasive belt base is 1/3 to 2/3 lower than that of cloth abrasive belt base.

The paper base is hard enough to grind a surface with high smoothness. Abrasive belt with paper base are used in both finishing and superfinishing grinding. Cloth abrasive belt base is stronger than paper abrasive belt base, ans it is less sensitive to temperature and humidity than paper abrasive belt base, so it will not lose stability when the temperature and humidity increase. Cloth abrasive belt is more durable than paper abrasive belt.

Commonly used abrasives in furniture production are alumina, silicon carbide, zirconia aluminum, and garnet. Hand sandpapers adopt glass sand as the abrasive. These abrasives have their own characteristics.

The granularity of abrasive greatly influence the productivity of sanding and the roughness of machined surface. Generally speaking, coarse granularity is used in situations such as coarse grinding, large plasticity, large grinding area, avoiding embedding scraps, and soft workpiece; fine granularity is used in situations such as fine grinding and hard workpiece. Abrasives are bonded to a belt base by an adhesive. The adhesive should be strong, elastic, heat-resistant, water-resistant, etc.

At present, the commonly used adhesives are animal glue and synthetic resin. Animal glue is not water resistant, but synthetic resin has good water resistance. Water-resistant abrasive belt adopts water-resistant synthetic resin as the base glue and doubling glue, and is treated with strict waterproof process.

2. The jointless abrasive belt will be eliminated

Using the tube cloth as the matrix, the jointless abrasive belt is produced through a series of processes such as original cloth treatment, glue coating, sand planting and curing. It has no joints.

This kind of abrasive belt was an early product, and today only Japan and China (including Taiwan) still remain this product. Due to the limitations of tube cloth matrix, production equipment, and production technology, this kind of abrasive belt can not meet many specifications in the current market, especially the requirements of wide abrasive belts. Besides, the production efficiency is low and the process is complex, so it has been gradually eliminated in the development of modern abrasive belt production, and replace by abrasive belts with joints.