Sintering

manufacturing products with highly precise tolerances

Sintering

Sintering offers the possibility of manufacturing products with highly precise tolerances and a smooth surface finish.

Benefits

  • Affordable cost in case of high volumes
  • Good reproducibility, even in the long-term
  • Little loss of material during production
  • Smooth surface finish
  • The parts have a controlled porosity, which enable them to be made self-lubricating or to be used as a filter
  • High precision process
  • Complex shapes are possible, if the part is pressed in the axial direction

Possible alloys

  • Carbon steel
  • Copper alloys
  • Stainless steel

Technical specifications

  • The largest possible dimension is about Ø 180 mm, but this depends on a number of factors.
  • The most important factors are:
    • The shape of the component
    • The pressure capacity of the press
    • The material with the desired density
  • The tolerance depends on the tool divisions, the pressing direction, and the material: it is normally between ± 0.05 mm and ± 0.75 mm
  • The component is formed by the mould, the dies and optional core rods:
    • The outer contour is formed by the mould
    • The top and bottom sides of the component are formed by the core rods.
  • The component must be shaped, so that the powder can be compressed; the tool with the dies must also be robust
  • Cavities perpendicular to the pressing direction are not possible, unless through secondary processes
  • Steps, conical surfaces, markings, etc. can be made in the pressing direction by shaping them with the dies. Holes in the pressing direction can be made in various shapes, using core rods of at least Ø 1.6 mm, depending on the length of the desired hole
  • The draft angle for the outer contour is not necessary. This is only necessary on the surfaces, which are formed by the punches (± 7°)
  • Minimum wall thicknesses are preferably 2 mm, depending on the design, to keep the compressed powder robust
  • Weight: from a few grams to ± 1.5 kg
  • Strength depends on a number of factors, such as: the density and the shape
  • Sharp edges are prevented by tapering the most outer corners on the surface, formed by the tool divisions. Preferably 30° in the pressing direction (see the figure below)

Finishing options

  • Zinc coating
  • Nickel coating
  • Blackening (black oxide)

PROCESS sintering

A video that shows the process of sintering.

Highlights sintering

Get in touch

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