Casting: Depression Other names: indented, collapsed, suffocation, collapse edge. Characteristics: dented portion appearing on the casting smooth surface, the surface was naturally cooled state. Causes a casting structure design is unreasonable, there are thick parts locally generated heat section. 2, alloy shrinkage. 3, the gate cross-sectional area is too small. 4, the ratio down. 5, the mold temperature is too high. Remedy 1, to improve the casting structure, so that a uniform wall thickness slightly marine cable roll price difference between the larger thickness of the junction should gradually ease the transition, eliminating hot section. 2. Select the shrinkage of the alloy. 3, correctly set the gating system, appropriate to increase the cross-sectional area of ??the gate. 4, increasing injection pressure. 5, appropriate adjustments to die thermal equilibrium conditions, the use of temperature control devices and cooling. Our country is in the 1950s and the beginning of the sixties the investment casting used in industrial production. Later this advanced casting process has been tremendous development, have been widely used in the aerospace, automotive, machine tools, ships, internal combustion engines, gas turbines, telecommunications equipment, weapons, medical equipment and tools and other manufacturing industries, as well as for process Manufacturing and crafts of. The so-called investment casting process, it simply is to use fusible material (such as wax or plastic) fusible model (referred to as the melting mold or model), which is coated in several layers of a special fire-resistant coating, after drying and hardening After the formation of a whole shell, then steam or hot water from the shell model of melt away, and then placed in the sand box shell, filled with dry sand around it in the shape of marine cable roller manufacturers, and finally into the baking mold oven roasting at high temperatures (such as the use of high-strength shell marine cable roll, but will direct the firing shell after ejection may not have to shape), after the mold or shell after roasting, in which molten metal is poured to obtain castings. Marine cable roll price, marine cable roll, Chen Hua Chen machinery provided by the China Machinery Equipment Co., Ltd. Qingdao. 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!