ISOSTATIC PRESSING

Known as Cold Isostatic Pressing, this is a method of compacting powdered materials in all directions simultaneously a flexible mould, often a rubber bag is filled with powder and sealed. lt is then placed in a pressure vessel, which is then filled with fluid. This is normally soluble oil and water. The fluid is then pressurized and thus compacts the powder in the mould.

Benefits

 Isostatic pressing has now largely replaced the conventional method of mechanical pressing and has several benefits:

  • Lower toolinq costs
  • Less shrinkage and distortion
  • Minimal die wall friction
  • Better suited to complex shapes

 Air Driven Liquid Pumps are the most commonly used for generating the required pressures. Often more than one pump is employed, i.e. one pump to prefill the vessel and operate to a lower pressure, the second when taking it up to a higher pressure. The following are just a few of the industries and uses for Isostatic Presses:

Industries

  • Ceramic Industry
  • Making high tension insulator blanks for the Electrical and Power market, electro ceramic parts, vapour lamps, sewer pipes, spools for the Textile markets, tubes for Sodium.
  • Power Metallurgy
  • Making filter elements, bearings, blades for turbines, cutting tools, drill bits, hard metal dies and tools, forging preforms.
  • Refractories
  • Making refractory bricks, crucibles, furnace liners.
  • P.T.F.E. Manufacture
  • Grinding Wheel Manufacture
  • Manufacturers of Ferrite Products.
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