몰딩溫度와 時間이 彎曲 파티클 몰딩재의 物理的 및 機械的 性質에 미치는 영향

Effects of Molding Temperature and Time on Physical and Mechanical Properties of Curved Particle Moldings

This study was carried out on the effect of molding temperature and time on physical and mechanical properties of curved particle moldings. Compression molded process was applied to phenolic resin and wood particle blends into curve shaped moldings. In order to manufacture curve shaped particle moldings, liquid type resin and 40~60 mesh size of wood particles were blended in the drum blender and poured into th<: cavity of heated mold. The method of molding was molding to stops which controls the thickness of moldings by stopper. The levels of 1I0 C, I30 C, 150 C, 170 C in molding temperature and 30sec/mm, 40sec/mm, 50sec/mm in molding time were applied to investigate molding properties. With the increase of molding temperature and time, the density of moldings was increased and the dimensional properties (water absorption, thickness swelling) were improved. MOR and hardness were increased while impact strength was decreased as molding temperature and time increase. Impact strength was shown maximum value in the range from 130 c to 150 c and decreased with increasing temperature over 150 c.