Patent ID: 8062022

Claim:
A pressing device for isostatic pressing of a body from powdered and/or granulated material, comprising: a die comprising a die wall, wherein the die wall defines a forming space, the die wall comprising an elastic material, wherein the elastic material allows the pressing of the material in the forming space through isostatic pressure applied to the outside surface of the die wall, and the die further comprising a die opening extending through the die wall and connecting the forming space with the exterior of the die, wherein the die opening is configured to allow filling of the forming space with powdered and/or granulated material and to allow the removal of the pressed body from the forming space, and a punch configured to close the die opening during pressing, the punch having a front end that is inside the forming space and a back end that is outside the forming space, the punch comprising: a metallic insert, wherein the front end of the insert penetrates into the forming space and wherein the back end of the insert is outside the forming space; and, an elastic jacket circumferentially surrounding the metallic insert, wherein the front end of the elastic jacket penetrates into the forming space, wherein the back end of the elastic jacket is outside the forming space, wherein the die wall presses on the outer circumferential side wall of the front end of the elastic jacket when isostatic pressure is applied to the outside surface of the die wall, and wherein the isostatic pressure applied to the outer circumferential side wall of the elastic jacket forces the front wall of the elastic jacket further into the forming space.