APPARATUS FOR FORMING POWDER COMPACTS OF UNIFORM INTERCONNECTED POROSITY

摘要

Powder compacting apparatus includes an enclosure made of two parts of elastomeric material. One internal part contains the powder and is made of relatively soft, flowable, elastomeric material. The other part is external to the first part and is made of relatively hard, elastomeric material. The enclosure fits in a die cavity, with the hard elastomeric part placed to form a seal between the soft elastomeric part and the interface or open junction between walls of the die cavity. Pressing force applied to the die is transmitted to all sides of the enclosure to exert pressure isostatically on the powder, with the hard elastomeric part pressed against the wall interface of the die cavity to prevent extrusion of the soft elastomeric part from the die cavity.