ISOSTATIC PRESSING TECHNOLOGY IS THE USE OF PASCAL'S PRINCIPLE, THE PRESSED MATERIAL SEALED IN THE FLEXIBLE MOLD OR THE SOLID WORKPIECE WITH A CLOSED SHELL IS PLACED IN A HIGH-PRESSURE CYLINDER FILLED WITH FLUID PRESSURE MEDIUM, AND THE HIGH-PRESSURE EQUIPMENT IS USED TO APPLY A CERTAIN PRESSURE TO THE PRESSURE MEDIUM IN THE CYLINDER, AND THE PRESSURE IS TRANSMITTED EQUALLY TO THE INTERFACE OF THE FLEXIBLE MOLD OR WORKPIECE THROUGH THE PRESSURE MEDIUM, SO THAT THE PRESSED MATERIAL OR WORKPIECE UNDERGOES A CERTAIN VOLUME DEFORMATION UNDER THE ACTION OF ISOSTATIC PRESSURE. Thus achieving isostatic suppression. If the material to be pressed is a powdery substance, when the pressure acts equally on the surface of the flexible mold, the powder in the envelope will be uniformly compressed and densified, and its shape is smaller than and similar to the cavity of the flexible mold.
ISOSTATIC PRESSING TECHNOLOGY IS USUALLY DIVIDED INTO COLD ISOSTATIC PRESSING, WARM ISOSTATIC PRESSING, AND HOT ISOSTATIC PRESSING ACCORDING TO THE TEMPERATURE AT WHICH IT IS FORMED AND CONSOLIDATED.
Cold isostatic pressing is a technology to achieve isostatic pressing at room temperature, usually using rubber or plastic as the coating mold material and liquid or elastomer as the pressure medium. Cold isostatic pressing is mainly used for the forming and pressing of powder materials, providing preform blanks for further sintering, calcination or hot isostatic pressing processes.
The equal transmission of pressure in all directions of the fluid medium is the basis of isostatic pressing technology, and the key to isostatic pressing technology is to establish the interface between the pressed material and the pressure medium without leakage.
