METHOD AND APPARATUS FOR VACUUM PROCESS OF ISOSTATIC PRESSING OF POWDER MATERIAL

摘要

PURPOSE: A vacuum method for isostatic pressing and an apparatus thereof are provided to maintain internal vacuum of a rubber bag after a vacuum process because fluid makes mouth portion of a rubber bag perfectly sealed to maintain a vacuum state. CONSTITUTION: A vacuum method for isostatic pressing is as follows. A rubber bag filling body(10) is prepared by filling powder in a rubber bag. The rubber bag filling body is put in a vacuum box to make a vacuum state. An inlet of the rubber bag filling body is blocked up. In a state of blocking up the inlet, the rubber bag filling body is disposed in fluid of a bath(50) at predetermined depth and the vacuum state is maintained.