Effect of pores into which the pulley? Pores are large pulley casting the most common multiple defects, because the gas in accordance with the pores formed European standard pulley, porosity divided into three, namely due to reasons for the formation of type casting porosity invasive; metal precipitates due to the formation of liquid containing gas component of pores; because the molten metal and casting chemistry between each other forming reactive pores. 1 invasive invasive stomata pore surface is mainly due to sand accumulation of gas into the liquid metal form, the gas from the molding material in the water, a binder and various addenda and the like. 2 precipitation of precipitation of stomatal pores are aluminum and steel castings common pitfalls. It is mainly due to the reasons for the formation of the metal itself. Metal can be a lot of dissolved hydrogen, nitrogen and oxygen. Oxygen in the iron mainly in the form of iron oxide present in the metal during solidification, the solubility of hydrogen and nitrogen is significantly reduced pulley European standard specifications, hydrogen and nitrogen precipitation. When the iron is formed in the reaction of iron oxide and carbon monoxide European standard pulley wholesale manufacturers, while carbon monoxide is not soluble iron from solidified metal deposited on the surface or entrained European standard pulley price quotes, forming bubbles core up to grow up. Therefore, in the smelting process, to alloy oxidation and dissolution too much gas, it is easy to produce precipitation of large pulley casting porosity, and distributed in various sections of the casting. 3 reactive pores between the high temperature molten metal is poured into the mold material, cold iron and slag and other casting mold, the result of a chemical reaction to form a gas, causing the pores within the casting, collectively known as reactive pores. Pulley pinhole test proved that the bottom surface of the thin-walled castings large pulley many pores; pulley casting skin pores thicker more; sticky sand casting porosity at more; stomata more wet than dry; poor liquid steel deoxidation casting porosity more . Motor pulley how to install small motors generally used a hammer to drop, the size of the hammer to the right, the best time to hit the horn pad on the pulley, the pulley in order to avoid smashed. First on the positive keyway, after smashing the last round, then hit the key . spc European standard pulley manufacturers | Shaanxi European standard pulley | Hengda machinery provided by the Texas Hengda Machinery Co. Texas Hengda Machinery Co., Ltd. (www.sddzhdjx.com) (www.sddzhdjx.com) strong, credible, in Dezhou machining industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Hengda machinery into the brilliant and you work for a better future!