Design of inspiratory linear die-filling system

Abstract

Powder die-filling is an important process in the process of powder pressing. The effect of mold filling directly affects the subsequent pressing process and ultimately affects the quality of products. During the filling process, the air in the die has an obvious effect on the filling behavior, which seriously reduces the filling efficiency of the powder. Aiming at the influence of air in the process of powder filling, a set of inspiratory linear die-filling system was designed. The system is mainly composed of control module and mechanical module, in which the mechanical module includes two parts: filling device and inhalation device. The iron powder filling trial was carried out by using this system. The movement speed of the shoe was set as 250mm/s. It was found that the filling efficiency of the aspirated filling was improved by nearly 30% compared with that of the gravity filling. The results show that the aspirated die-filling can effectively reduce the influence of air on the powder filling behavior, and improve the filling efficiency of the powder die-filling.