Abstract In non-ferrous metal manufacturing, the produced alloys are generally susceptible to oxidation. At present, high-quality alloys can be obtained by effective metal processing technologies such as solution cleaning, slag granulation, and cyclic degassing. Keywords casting alloy Foam filter Aluminium castings In casting production, when liquid metal is injected into a cavity from a holding furnace, there is still the problem that any turbulence at this stage will produce thin scale. These defects not only do not "cure" again, but also remain in the casting as weak points and often fail the pressure test due to a leak created between the two walls. Filters have been widely used in nonferrous metal foundry for many years. However, it is clear that the filter must have the following two separate characteristics: 1 can remove metal attached impurities; 2 Ensure that the metal flow is smooth and there is no eddy current injection into the cavity. Initially, a short pause occurred as soon as the front liquid metal flow reached the foam filter inlet surface, creating sufficient back pressure. This pressure is caused by the metal level difference in the sprue. Once formed, the metal flow will recover as if the filter were not present at all. The turbulence in the gating system occurs mostly at the front end of the sprue and sprue bar. If a foam filter is placed across the sprue bar, the flow of the metal in the front strand will be blocked. Once the sprue is filled, it will be a smooth pouring, thus preventing the formation of scale. Foam filters are filters with this property. The sprue is not completely filled when the mold is not filled with the filter, and the mixture of liquid metal and air goes down the runner. As a result, an oxide film is formed and air is entrained into the cavity so that the mechanical properties of the casting are reduced and the pressure tightness may be lacking. Casting was performed using a gating system of the same specification as above except that the Sivex FC foam filter was added to the casting bar. After the sprue is quickly filled, metal non-turbulent flow will continue along the sprue into the cavity. With the built-in Sivex FC filter, the formation of agglomerates of oxides is clearly visible on the inlet surface of the filter, which indicates that in existing casting systems where turbulence often occurs, the use of such a filter effectively blocks Oxide. Case Study The following two surveys fully illustrate how non-ferrous metal foundries use streamlined metal flow to control costs. Barron-Clarker Foundry Co., Ltd. (Barran- Clark L td) The Barron-Clarke Foundry Company produces certain small die castings. However, most of the company's products are produced using aluminum alloys in sand molds. Foam filters can sometimes be used as a Kalpor A1 device for various sand molds. In casting, they not only reduce the content of non-metallic inclusions in the castings, but also significantly reduce the amount of sand used. For example, before using the filter, the sprue bar is usually placed at both ends of the 2 m long aluminum rail casting. Now simply pass them through the filter at the top. This significantly reduces the width of the long sand mold, thereby reducing the need for resin bonded sand. In addition, the quality of the castings is improved and the amount of castings removed is also reduced. The same applies to automotive parts. The oil bath castings shown here are cast directly through the Kalpu r A l unit fitted with Sivex FC non-ceramic filters. The benefits are: 1 Casting weight can be reduced from 11. 5 kg (no filter) to 7. 5kg (with filter) 2 Scrap rate decreased by 3.5% 3 Reducing the cost of sand This makes castings of 6.25 kg per casting, which can directly save costs 3.62 pounds, nearly 4 300 pounds a year, see Table 1. In addition, there are many unpredictable benefits such as reducing the amount of castings cleaned, increasing production, and reducing waste sand burial. This is especially true in the latter case. With the implementation of the new land reclamation tax, the effect will become more pronounced. V acast P roduct sL td Volker uses gravity and low pressure die casting to produce aluminum castings. Both processes have their own advantages, allowing for a detailed assessment of individual projects. Its extensive customer base includes manufacturers of automotive components, lighting systems, tools and household items. A radiator top tank for commercial vehicles produced by the company Volker, for the LM 6 die cast. This relatively thin-walled part initially encountered problems, and each casting must be sent to an expert for vacuum impregnation. Until a non-ceramic filter with approximately 4 holes per centimeter was installed at a single gating station, the problem was resolved and the 3.44 kg casting was successfully poured without impregnation. Each casting, plus the net cost of the filter, can save 1.76 pounds directly, and save 3,400 pounds per year. Conclusion The foam filter not only provides the foundry industry with the ability to remove the impurities contained in the metal stream, but also controls the amount of potting to make the casting smooth. This ability, when poured directly, not only improves the quality standards for casting, but more importantly it changes the way the castings are produced.