電子基板からの部品剥離に対する撹拌翼式ドラ厶型衝撃式破砕機の性能比較

摘要

Performance for parts detachment from printed circuit boards (PCBs) was compared between chain-using and agitator-using drum typed impact mills. Both experiment using simulant PCBs and discrete element method (DEM) simulation including particle based rigid body model were conducted. Impact energy necessary for part detachment from the board was also measured by repetitive impact tests and used for quantitative discussion of DEM simulation results. Experimental results showed that parts detachment was more enhanced by a chain using mill than a conventional agitator using mill In DEM simulation, during one collision, PCBs were multiply collided and sometimes had bigger damping energy in a chain using mill than in an agitator, although these trends were depended on orientation of PCBs. The chain using mill caused higher dumping energy and larger number of collision with parts than an agitator using mil, even if kinetic energy of chain/agitator was the same.%近年，小型家電などの廃棄物を有効にリサイクルすることにより，ベースメタルやレアメタルなどの有用金属を有効活用し，天然資源の延命と持続的な資源循環型社会の実現を目指す「都市鉱山」の考え方が注目を集めている。