sand casting

• sand casting Process

  • A mould is put into a box (drag) and then the box is filled with sand.
  • The mould is removed and another box (cope) is placed on top.
  • The cope has channels in it to pour the molten metal into, which fills the mould cavity.
  • It is left to cool and then excess metal is removed.

  
• Why use sand casting?

  • It is suitable for batch production
  • Large parts can be created
  • Equipment for sand casting is cheap compared to other methods
• Disadvantages of sand casting

  • It takes a skilled person a lot of time to create one product using this method
  • The sand leaves a bad surface finish
• Uses of sand casting

  • Engine blocks
  • Gear blanks
  • Crankshafts
  • Brake drums
• Identifying sand cast products

  • Rough surface texture
  • Tapered angles
  • Large parts without intricate detail