Many factors affect the quality of castings, the first is the casting of the design process. Conduct dock cable channel supply design, in addition to determining the casting geometry, size according to the working conditions and material properties of metal, it must also cast alloy and casting from the perspective of process characteristics to consider the reasonableness of the design, namely a significant size effect and solidification, shrinkage, stress and other problems, in order to avoid or reduce the casting segregation component, deformation, cracking and other defects. The second to have a reasonable casting process. Casting structure that is based on the weight and size, cast alloy and production conditions, select the appropriate sub-surface and shape, making the core method, a reasonable set of cast bars, cold iron, riser and pouring system. In order to ensure access to quality castings. The third is the casting quality of raw materials. Quality metal charge, refractories, fuel, flux, modifier and foundry sand, sand binder, paint and other materials, sub-standard dock cable channel, will make casting porosity, pinholes, slag, sticky sand and other defects, the impact of appearance and internal quality casting, casting serious cause scrapped. The fourth is the process operation, to develop a reasonable process rules to enhance the skills of the workers, so that technical rules properly implemented. Casting defects: cold resisting grain Other names: Splice (butt), waterlines. Features: low temperature metal flow mutual butt fusion but the emergence of the gap, irregular linear, non-penetrating and penetrating two dock cable trough, there are trends in the role of external forces. Reason: a molten metal pouring temperature is low or the mold temperature is low. 2, alloy composition does not meet the standards, poor mobility. 3, sub-unit filled with liquid metal, fusion is bad. 4, gate unreasonable process is too long. 5, filling speed is low or poor venting. 6, lower than the pressure. Qingdao dock cable trough, dock cable trough, Chen Hua machinery provided by China Machinery Co., Ltd. Qingdao Chen. 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!