The primary function of the gating system is to introduce metal quickly into the mould without turbulence and to prevent non-metallic inclusions in the liquid metal from entering the casting. While this is still their main function, they are also used to simplify running systems allowing more castings to be made in a mould and improving the yield of castings.
Foseco offers a range of carbon bonded alumina, silicon carbide, zirconia and graphite based filters for steel, iron and non ferrous alloys.
Filters for steel castings
The variety of steel filtration systems available facilitate the production of steel castings with improved integrity, physical properties, and surface finish. Production costs are reduced particularly through the reduction of scrap and post casting upgrading.
Filters very efficiently remove particulate non metallic inclusions and liquid slag form the molten metal stream before mould filling. The casting producer can achieve reduced scrap and improved yields. The variety of iron alloys cast have different requirements so a range of filter efficiencies and pore sizes are available.
The smoothing and restraining of the metal flow is an important property of foam structure filters. In addition to this, exogenous and/or endogenous inclusions are removed effectively from the metal stream before entering the mould cavity.
