Castings

Gravity die casting

Producing complex internal cavities

Gravity die casting (low pressure die casting)

Complex internal cavities can be produced with gravity die casting (low pressure die casting).

Benefits

  • More possibilities compared with sand casting
  • Consistent dimensional accuracy
  • Possibility to insert metal parts in the casting (such as bolts, pipes etc.)
  • Highly suitable for finishing operations

Possible alloys

  • Aluminium alloys
  • Magnesium alloys
  • Copper alloys

Technical specifications

  • The commonly used casting tolerance table for linear dimensions is CT8 according to ISO 8062 (wall thicknesses CT9)
  • Weight: 30 grams to 80 kg
  • Casting surface roughness: ± Ra 6.3 μm
  • Maximum dimensions: 1000 mm
  • Casting wall thickness: ≥ 3 mm. Wall thickness should be distributed as evenly as possible
  • The geometric tolerances that are required for the function should be specified in the drawing
  • The minimum draft angle depends on the height of the wall or rib. The higher it is, the smaller the required minimum draft angle. Minimum draft angle from 1°, starting from 2° – 3°
  • The position of the ejection pins must be discussed with the customer

Finishing options

  • Technically anodising, but not decorative (it turns a mottled matt black)
  • Blasting
  • Vibra-polishing
  • Primer, wet painting and powder coating

Process gravity die casting

A video that shows the process of gravity die casting (low pressure die casting).

Highlights gravity die casting

Get in touch

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Mark Naber
Product Manager
mnaber@elcee.nl +31 78 654 47 57
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