A Basic Study on the Alternative Development of Piston for Shock Absorber

충격 흡수기 피스톤의 대체 개발에 관한 기초적 연구

This study is aimed at cutting down the cost, weight and improving process by replacing the traditional sintered piston of the shock absorber with engineering plastic piston by means of injection molding. To obtain the high mechanical properties, glass fiber material was selected adequately and forming analysis considering fiber orientation was made to remove the forming deficit fators and to construct the optimal runner system. In addition, structural analysis using commercial software MOLDFLOW was performed under near conditions in actual driving of automotive. The results from the internal pressure process test, oilproof test based on forming, structural and strength analysis shows that hydraulic close performance and damping force considering the out of roundness of shock absorber are relatively good.