Casting

Casting

1. Pros & Cons

   • Cons
     • Low Mechanical properties
     • Poor accuracy
     • Relatively poor surface quality
     • Environmental impact
     • Internal defects
   • Pros
     • In General
       • Near net-shape in a single step
       • Very large parts
       • Variety of metals
         • Cast iron - Al - Mg - Tin (Sn) & Zn alloys [ Good Castability ]
       • Batch and Mass Production
       • Complex Shapes
       • Internal Cavities
     • Metal casting
       • Produce part in single step (near-net shape)
       • Complex shapes
       • Internal cavities
       • Produce large parts
       • Produce a wide variety of shapes and sizes

2. Pattern Allowances

   • Shrinkage
   • Machining
   • Draft
   • Fillets

3. Design Considerations

   • Corners, angles & section thickness
   • Flat areas
   • Shrinkage
   • Draft
   • Dimensional torlerances

4. Types

   • Sand *|
     • mold

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