Casting quality has a great impact on the performance of mechanical products. For example, wear resistance and dimensional stability of the casting machine, a direct impact on the accuracy of the machine to maintain life; the accuracy of various types of pump impeller, housing and hydraulic cavity size, profile and surface roughness jetty port cable channel direct impact on the efficiency of the pump and the hydraulic system, energy consumption and other development and cavitation; intensity combustion engine block, cylinder head, cylinder, piston rings, exhaust pipes and other castings and resistance to spalling resistance, direct impact on the engine working life. Casting metal forming theory often called liquid molding casting, casting forming technology has a long history. As early as 5000 years ago, our ancestors will be able to cast copper and bronze. Casting is the most widely used metal liquid molding processes. It is the liquid metal is poured into the mold cavity, wait until the cooling and solidification, to obtain a certain shape or parts of the method blank. Casting defects: abrasions Other names: pull, pull marks, sticky mold scars. Features: along the parting direction, due to the price of the metal adhesion port cable ducts, mold manufacturing slope is too small to cause injury marks casting surface, serious face became strained. Reason: 1, core, type casting wall slope is too small or appear down the slope. 2, core, pressure-type wall scars. 3, alloy adhesion mold. 4, the top of the casting skewed, or core axis deflection. 5, the wall-type surface roughness. 6, paint spraying less often. 7, aluminum iron content of less than 0.6%. Remedy: 1. Fix mold port cable channel, to ensure manufacturing slope. 2, lighting indentation. 3, the rational design of gating system supply port cable ducts, avoid metal core flow hedge, wall type, due to lower fill rate. 4, the amendment mold structure. 5, polishing surface. 6, the amount of thin, uniform coating, spray coating can not be missed. 7, due to increase the iron content to 0.6 to 0.8%. Cable channel supply port | port cable channel | Chen Hua Chen machinery provided by Qingdao China Machinery Equipment Co., Ltd. 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!