Casting defects: abrasions Other names: pull, pull marks, sticky mold scars. Features: along the parting direction, due to metal adhesion, mold manufacturing slope is too small to cause injury marks marine cable roll price 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 the mold, to ensure manufacturing slope. 2, lighting indentation. 3, the rational design of gating system, avoid metal core flow hedge, wall type, due to lower fill rate. 4, the amendment mold structure. 5, polishing surface. 6, the amount of a thin, uniform coating marina marine cable roller, spray paint can not be missed. 7, due to increase the iron content to 0.6 to 0.8%. 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; all kinds of pump impeller, housing and hydraulic cavity size, accuracy and surface roughness profile, directly affect the pump and efficiency of the hydraulic system of marine cable roller products, the development of energy consumption and cavitation, and so on; the strength of the internal 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 historic application. Ancient people used to make castings and some life appliances. In modern times, mainly used for rough casting machine parts, precision castings, and some can also be used directly as machine parts. Casting mechanical products occupy a large proportion, such as tractors, the casting weight of about 50 to 70% by weight of the machine, agricultural machinery accounted for 40 to 70 percent, machine tools, internal combustion engines, such as the 70 to 90%. All kinds of castings, casting machinery used in the most varieties, the most complex shapes, the amount is also the largest, accounting for about 60% of total production of castings. Followed by the ingot mold and metallurgical engineering pipeline, as well as some of the tools of life. Wharf marine cable roller _ Chen Hua Machinery (certified) _ marine cable rolls provided by China Machinery Co., Ltd. Qingdao Chen. Qingdao Hua Chen Machinery Co., Ltd. (www.qdchenhua.com) is Qingdao, a leader in CNC machine tools over the years, the company implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Chen Hua Machinery leadership in the staff warmly welcome all inquiries negotiations to create a better mechanical Chen Hua future.