METHOD FOR PRESSING ARTICLES FROM POWDER MATERIALS AND A MOULD FOR CARRYING OUT SAID METHOD

摘要

The inventive method for pressing articles from powder materials and mould consists in placing powder material in a mould cavity defined by an active and a passive surface of solid or composite shaping elements of the mould, reciprocally moving the forming elements of the mould along the axis of pressing, a pressing force being transferred from the forming elements of the mould towards the powder material by means of active forming surfaces thereof. The surfaces of a powdered article parallel to the axis of pressing are shaped by means of the passive shaping surfaces of the solid or composite forming elements of the mould. During the shaping of the surfaces of a powdered article parallel to the axis of pressing, the parts of at least one passive shaping surface are used, said parts being disposed on the solid or composite shaping elements which are divided along the axis of pressing. Afterwards, the shaping elements of the mould are displaced in such a way that at least one solid surface of the powdered article parallel to the axis of pressing is formed by means of said parts of at least one passive shaping surface, which is divided along the axis of pressing, belonging to different forming elements, said shaping elements being displaced in the opposite directions. The inventive mould for carrying out said method is also disclosed.