There are many method of solidifying casting. Casting in the solidification process, on which the cross section is generally divided into three zones: 1- solid phases 2- solidification zone 3- liquid region on solidification zone width solidification zone is larger, and so divided solidification mode. First, the intermediate solidification: between coagulation and mushy layer by layer solidified alloy solidification between majority. Second, layer by layer solidification: pure metals, eutectic alloy during solidification without coagulation zone, section liquid, solid two-phase clearly separated by a boundary, with the temperature drops, the solid phase layer increasing, decreasing the liquid layer, direct access to the center. Thirdly, mushy solidification: alloy crystallization temperature range is very wide port bollard supply within a certain period of time in the coagulation casting surface there is no solid layer solidification zone throughout the section port bollard, the first paste after curing. Experts said that factors that affect the way solidification summary: First, the casting temperature gradient. Alloy crystallization temperature range is constant, the solidification zone width depends on the inner and outer layers of the casting temperature gradient. The smaller temperature gradient, the more wide solidification zone. (Inside and outside temperature, and cooling fast, narrow solidification zone). The second jetty port bollard, alloy crystallization temperature range. Small range: solidification zone narrow harbor bollard price, the more inclined solidified layer by layer. Eg: sand casting, low carbon steel solidified layer by layer, high carbon paste solidified casting defects: cold resisting grain Other names: Splice (butt), waterlines. Characteristics: a relatively low temperature metal flow butted to each other but not fusing gap occurs, irregular linear, there are two kinds of penetration and do not penetrate, the trend of development under the action 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. Port bollard manufacturers | Port bollard | 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!