Premium filters for aluminium and copper castings

Benefits of SIVEX filters
  • Controls the velocity of the metal stream
  • Removes entrained air
  • Captures inclusions and oxide films
  • Low density
  • Non-ceramic

SIVEX FC are available in various porosities:

  • coarse (10 ppi)
  • medium (20 ppi)
  • fine (30 ppi)

*ppi = average number of pores per linear inch.

SIVEX non-ceramic filters for aluminium alloys

SIVEX FC filters are non-ceramic foam filters used in light metal casting. Although capable of removing inclusions from the metal stream, its primary purpose is to reduce turbulence and ensure quiet, smooth mould filling to minimise the risk of oxidation defects. Best results are achieved when positioned immediately as close to the casting as possible.

SIVEX FC filters float readily in remelt, so they can be easily removed by skimming. Because of their phosphate-free binder, SIVEX FC filters eliminate any risk of phosphorus pick-up during remelt. In comparison to other known ceramic filter materials, SIVEX FC filters can be machined without problems. 

SEDEX and STELEX ZR filters for copper alloys

SEDEX is a range of silicon carbide based ceramic foam filters suitable for copper base applications. The maximum application temperature for SEDEX filters is 1500 °C. The high filtration effectiveness combined with a reduction in turbulence often allows gating systems to be greatly simplified. SEDEX filters can be positioned vertically, horizontally, or diagonally in a suitably designed runner system.

STELEX ZR filters are particularly suited for aggressive metals like beryllium copper alloys.

Application of KALPUR direct pouring unit
KALPUR direct feeder sleeve with filter used for a non ferrous casting application.

KALPUR AL combined filter and sleeve for the pouring of non ferrous castings

KALPUR direct pour technology, developed by Foseco, consists of a combination of a highly insulating feeder material and a foam filter. The metal is poured directly into the mould through the KALPUR, where this “gating“ system also performs as a feeder. The SIVEX FC (aluminium) or SEDEX (copper base) filter smoothes the metal stream, controlling the filling, and the insulating feeder material of the KALPUR helps to increase the feeding efficiency.

Downloads