Due to various factors, often appear pores, pinholes, slag, cracks, dents and other defects. Repair equipment commonly used for welding machines, resistance welding machines, welding and other cold. For the quality and appearance of the less demanding casting defects can use welding machines and other heat, fast welder to repair. But in the field of precision casting defect repair, due to the large impact of argon welding heat will cause distortion when casting repair, reduce the hardness, trachoma, partial annealing, cracks, pinholes, abrasion, scratches, undercut, or a combination of force is not enough and within stress injuries and other secondary defects. Cold welding just overcome the above drawbacks, its advantages mainly in small heat-affected zone, casting without preheating, room temperature cold welding repair, thus no distortion, undercut and residual stress, no local annealing, does not change the casting metal organizational status. Thus cold welding surface defect fixes for precision castings. Range for welding cold welding welding Φ1.5-Φ1.2mm repeated melting point accumulation process, in a large area of ??defect repair process, the repair efficiency is the only factor in its widespread application constraints. For large defects, recommend traditional welding process and casting defect repairing machine composite applications. Sometimes we may not have a lot of flaws wrought iron fence, on unnecessary costs into a larger, we can repair some Putty good, convenient and simple, such as ferrous materials, we can use (as Jin Su) JS902 mended Iron can be a window into the future can ever use again, so you can save costs for our manufacturers, ah, let's cast the manufacturers to put more money into improving the quality of the product itself, allowing users to create more wealth. Casting very versatile, has been applied to the metal and the whole machinery and electronics industries, and its use is a growing trend. Specific use, construction, hardware, equipment, construction machinery and other large machinery iron, machine tools, shipbuilding, aerospace, automotive, motorcycle, electronics, computers, appliances, lighting and other industries, many of which are ordinary people all day contact, but do not know metal objects. Advantage of using resin sand casting machine bed casting: a resin sand stiffness, high early strength pouring sand which conditional use graphite cast iron solidification process of expansion of iron fittings, effectively eliminate shrinkage, shrinkage defects, to achieve gray cast iron less ductile iron riser, non-riser casting. 2 Real foundry applications using polystyrene foam plastic look furan resin self-hardening sand molding. When the liquid metal poured into the mold, the foam appearance quickly gasified at a high temperature liquid metal effect, burning disappeared, the molten metal replaces the original position occupied by the foam, cooling and solidifying into the same shape and look real castings. Wrought iron flower _ _ Chen Hua Chen machinery provided by Qingdao China Machinery Equipment Co. Qingdao Hua Chen Machinery Co., Ltd. (www.qdchenhua.com) strong, credible, in Qingdao, Shandong CNC machine tool industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Chen Hua machinery and you hand into the brilliant, for a better future!