Abstract: An isostatic press acts against a molding tool (4,5,11,12,32,33) enclosed in the pressing chamber of the press, the cavity (4) of the press tool being defined in the press by an enveloping wall (5) of an elastomeric material and two end walls (11,33) meeting the enveloping wall (5). The dry pressing chamber of the press is defined by a radially deformable elastomeric jacket (6) exercising pressure against the enveloping wall (5) of the molding tool, and two press end structures (2,3) meeting the pressing chamber jacket (6) and carrying the end walls (33,11) of the molding tool. At least one end wall (33,11) is carried by an adjacent end structure (3,2) via an elastomeric element (31). The elastomeric element is disposed with its peripheral edge exposed against, and lying adjacent the deformable elastomeric jacket (6) of the pressing chamber.
Abstract: An isostatic press includes a closed press frame, there being a pressure chamber bearing against a first interior portion of the frame. A conveyor path for pressure chamber closures (3) each carrying a press tool part, extends through the frame under the pressure chamber, displacement means being arranged for lifting in the plane of the frame a chamber closure (3) into contact with the pressure chamber. During pressurization of the pressure chamber (1) the closure (3) is carried by two separate support legs (4,5) pivotably mounted in the plane of the frame, the conveyor path extending between the legs. The closure (3) is carried in the plane of the frame by a portion (72) of the conveyor path, which constitutes the lower press table of the press and is supported by the legs. The free end surfaces of the legs may have an arcuate contour in the plane of the frame and coact with complementally formed surfaces on the underside of said portion (72).
Abstract: A plant for cold isostatic pressing of powder to pressed bodies includes a dry isostatic press, a plurality of press tools, a circulation conveyor path (2) for the tools and means for advancing the tools (3) along the path (2). The path (2) includes a first and a second straight section (21,22). On one side of the press there extend a plurality of third straight mutually parallel conveyor sections (23) at right angles to the sections (21,22). Each such third conveyor section (23) extends through an associated filling station (10). A plurality of fourth conveyor sections (24) extend parallel and at right angles to the first and the second conveyor sections (21,22) on the other side of the press. Each fourth conveyor section (24) extends through an associated emptying station (11).
Abstract: A moulding tool unit for semi-isostatic compaction of a powder has a mould cavity (14) defined by an elastomeric jacket (121). The jacket (121) is surrounded with clearance by an elastomeric sleeve (122) which is sealingly joined to the jacket (121). The space (123) between the sleeve (122) and jacket (121 ) is filled with an isostatic pressure translating medium such as a hydraulic liquid (127). The jacket (121) may be supported in a direction towards the sleeve (122) by a stiff jacket (125) having perforations (126) through which the hydraulic liquid (127) can flow. The unit is adapted such that for a pressing operation it can be inserted with a small clearance and pressurized in the dry pressing chamber of a hydraulic press.