2. mold pattern-gating
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2. mold pattern-gating

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    2. mold pattern-gating 2. mold pattern-gating Presentation Transcript

    • Expendable Mold Casting Sand casting Pattern is permanent
    • Moulding Materials
    • Testing of moulding sand properties • Moisture content • Clay content • Sand grain size: determining the grain fineness number (GFN) • Permeability – Specimen preparation – Standard definition • Strength – Green strength – Dry strength • Mould hardness
    • Pattern making Materials: Properties: low cost, low weight, easy formability, less dimensional changes, surface finish Size of casting, number of casting, dim. accuracy • Wood: pine, teak, walnut • Metal: aluminium alloys, grey cast iron, steel • Plastic: poly urethine foam
    • Types of patterns • • • • • • • • Single piece pattern Split pattern Cope and drag Pattern Match plate pattern Loose piece pattern Follow board pattern Sweep pattern Skeleton pattern
    • Single piece pattern Split pattern
    • Cope and Drag pattern Match plate pattern
    • Follow board pattern Loose piece pattern Sweep pattern
    • Various types of gates Mould cavity Top gating Mould cavity Bottom gating Mould cavity Parting line gating
    • Various furnaces used in FOUNDRY PRACTICE • Blast Furnace • BOF • Cupola • Oxygen Lance Furnace • Electric Arc Furnace • Induction Furnace
    • Crucible furnace
    • Cupola
    • Electric Arc Furnace
    • Induction furnace
    • Pouring vessel