Dry-bag Isostatic Pressing
At present, in rare earth permanent magnet magnetic materials, larger square and cylindrical products are almost all preformed by magnetic field, packed with plastic film and then cold isostatic pressed to improve density and uniformity. Operations such as plastic film packaging, cold isostatic pressing, removing plastic seals, and loading sintering boxes are difficult to automate due to many operations, resulting in a large number of operators, which puts pressure on cost and quality management. Oily plastic bags are difficult to recycle and cause pollution.
The introduction of dry isostatic pressing is to overcome the deficiencies in the prior art and provide a dry bag powder molding method and equipment that requires less personnel, does not waste materials and reduces process steps.
In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is:
The working principle of dry isostatic pressing is very similar to that of oil isostatic pressing. It transfers the force of the high-pressure liquid outside the workpiece to the workpiece through the software diaphragm, so that all surfaces of the workpiece receive the same pressure, and a blank with uniform density is obtained. .
The difference is that the dry isostatic pressing is to fix the soft isolation membrane in the isostatic pressure to isolate the liquid outside. The workpiece does not need additional packaging and is directly placed in the isolation sleeve. The pressure rod above the high-pressure chamber directly seals the high-pressure chamber, and soft materials are padded at the parts that contact the workpiece.
Jiangsu High Industry on the research and development and production of high-performance polyurethane isostatic pressing molds. Through in-depth cooperation with many isostatic pressing equipment manufacturers and in-depth study of the industry, the developed isostatic pressing polyurethane mold series products have the characteristics of long service life, high precision, small deformation, easy demoulding, etc., and are widely used in ceramics, etc. Static pressing mould, cemented carbide isostatic pressing mould, rare earth permanent magnet material isostatic pressing mould, graphite isostatic pressing mould, etc.
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