SEDEX is a range of silicon carbide based ceramic foam filters designed for use in grey and ductile iron applications to provide a smooth laminar flow of molten metal and prevent the ingress of slag, magnesium reaction products, inoculant residues or sand grains into the mould cavity. The high filtration efficiencies 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.
SUPER SEDEX is a range of new generation silicon carbide based ceramic foam filters with a consistent, high level performance in terms of metal flow rate and filtration efficiency. The consistent pouring times and enhanced flow rate characteristics make SUPER SEDEX ideally suited for vertically parted moulding applications such as DISAMATIC. The improved open pore ceramic structure of SUPER SEDEX allows foundries to:
SEDEX ULTRA ceramic foam filters represent the latest development in the filtration of ductile, grey and malleable iron castings. Using a unique production process, the edges of the filter are closed on all 4 sides, resulting in improved edge definition.
The closed edges of the SEDEX ULTRA filter also give improved handling characteristics, particularly with automated placement systems. Furthermore the consistently more open pore structure of these filters provide advanced flow characteristics enabling foundries to employ finer and/or smaller filters, whilst maintaining their pouring times and metal flow rates. These characteristics make SEDEX ULTRA ideally suited for vertically parted moulding applications such as DISAMATIC.
STELEX PrO is a range of carbon aluminium oxide ceramic foam filters and are particularly suited to the production of white iron and large ductile iron castings. Previously, it has not been possible to filter these castings due to problems with chill, filter capacity and filter strength. Practical experience has shown the benefits of filter-clean castings and, more specifically, improvements in surface finish leading to significant savings in fettling and cleaning operations.
Round filters are more commonly used in KALPUR direct pour applications where they are located inside an insulating or exothermic feeder sleeve, with optimum feed characteristics being achieved when the filter is allowed to float after pouring.
HOLLOTEX EG Runner are a range of lightweight running and gating system components with simple push-fit connections, ideally suited to the production of heavy iron castings.
Due to the breakdown properties of the HOLLOTEX EG RUNNER system it can be fully recycled in the existing sand system, thereby reducing or eliminating sand recycling problems.
The KALPUR process entirely eliminates the need for a conventional running system. In addition, by allowing the foundryman to pour directly into the casting, directional solidification is improved. KALPUR units for iron castings consist of a specially designed KALMIN insulating feeder sleeve or a KALMINEX exothermic/insulating feeder sleeve and a SEDEX or STELEX PrO ceramic foam filter. This allows castings to be successfully poured directly through the feeder.