Research on Failure Mechanism of Abrasive Belt and Effect on Sanding of Medium-Density Fiberboard (MDF)

Sanding is a very important process in MDF production. In this study, abrasive belts (P60 and P120) were used to conduct sanding experiments, mass variation, surface morphology, roughness of the measured analyze failure utilized belts. It found that belt mainly increased process. The increase range P60 within scope 0~0.02 g, while for P120, change mostly fluctuates 0~0.01 g. (Sa Sku) presents down-and-up trend as times increase, Sa Sku are both larger than those P120. Wood fibers with adhesive blocked space among grits led “grits gathering” phenomenon. When area larger, it forms an “blocking”. Grit wear (dropping-off, fracture) “blocking” constitute two predominant patterns mechanism. This study helpful further improve wood-material-sanding theories, provide insights investigate other belts, determine extend life