Sintering and Coating

The applications of materials produced using the sintering technique are wire baskets, trays, door accessories, clips, books, clamps, metal containers and tanks for corrosive liquids and pastes, metal fittings used in joining with PE and other plastics, stirring equipment used in chemical laboratories and industry, and many others. 

To produce plates and blocks by sintering, a polymer powder is compacted imder a pressure of 100-150 daN/cm for 5-10 minutes at room temperature, or after preheating in a fluidised bed. The preform thus obtained is pressed at 30-50 daN/cm at 180-220 C depending on the thickness of the material layer. Cooling is performed after the pressure has been increased to 200 daN/cm to compensate for the volume contraction and to ensure that the plate is flat. Pressure is maintained to a temperature of 50-60 C, whereupon the plate is removed. Pressure, temperature, and pressing 

Injection blow moulding allows hollow articles to be produced. With overmoulding (co-injection), it is possible to produce articles with rigid cores (metal or polymer) by placing the cores in the mould before the plastic is injected. 

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Tesaki, M. and Tanaguchi, H. (1984) High-speed cutting tools sintered and coated. Kogyo Zairyo (Ind. Mater.), 32, 54-71. 

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