Despite the transfer and pouring melt the solid alumina density similar to the density of molten aluminum, the molten aluminum into the interior of Zhejiang electric vehicle recovery, over a long enough period of time before sinking to the bottom of the crucible accompany. After the molten aluminum and an aluminum oxide film formed by oxidation, but only in contact with the aluminum melt side is dense, loose contact with the air side and a large diameter holes 60--100A its large surface area, adsorption strong, easily absorbed moisture, anti tends floating. Thus, the proportion of this oxide film and the aluminum melt is small, which is mixed with the melt, drifting slowly, it is difficult to exclude from the melt, the formation of pores too inclusions in the casting. So, the key is to transfer molten aluminum to minimize stirring the molten metal to minimize contact with the melt and air. In order to prevent the oxide film formed Hunan electric vehicles recovered in the casting, we need to let the metal, especially in milli turbulent state into the mold cavity. For most castings, the use of gravity casting method it is impossible to do this, because the sprue head height in order to speed up the flow rate turbulence occurs, so be sure to use anti-gravity die casting method or level of technology. Such filters slow down the speed of the metal flow to slow enough to prevent oxide production. Also to be injected into the mold cavity from the bottom level of the order of each injection casting electricity should be carefully designed to avoid "waterfall" - die falling liquid metal from a higher level to a lower level of Hubei electric car recovery, thereby forming an oxide nascent metal surface. Use of injection mold from the bottom of the method, liquid metal oxide layer on top of the sand will be promoted to the top level of the box and into the top riser, so it will not damage the castings. Shandong Electric Vehicle Recycling | Sun Shine scrap metal recycling (certified) | electric cars Recycling scrap metal from the Linyi City Shengxin Limited. Linyi City Shengxin scrap metal recycling Ltd. (shengxin.tz1288.com) Shandong Linyi, leading scrap metal, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In Shengxin scrap metal recycling leadership with the staff warmly welcome all inquiries negotiations to create Shengxin scrap metal recycling better future.