1. Gravity cast molding process: sand casting, die casting. Relying on gravity molten metal pouring molten metal into the cavity. 2. Pressure casting: casting three low pressure trough, high pressure casting. Rely on the additional pressure molten metal into the casting mold cavity pressure moment. ① mold casting process typically includes (liquid metal to become the solid cast container) Prepare streamer groove pressing, mold according to the materials can be divided into sand, metal, ceramic, clay type, graphite, etc., according to the frequency of use is divided into one-time, semi-permanent and permanent, mold preparation merits of the main factors affecting the quality of castings; ② cast metal melting and pouring, casting metal (cast alloy) there are all kinds of cast iron, cast steel and cast nonferrous metals and alloys; ③ casting process and test streamer tank factory, casting process including the removal of foreign body core and the casting surface, removal Riser, Grinding burrs and Phi joints and other projections as well as heat treatment, shaping, and anti-rust treatment roughing like. Sand casting method (Sand Casting) utilizing sand as the mold material, according to different components of the sand can be subdivided into the wet sand casting method (Green Sand Mold), surface dry sand casting method (Dry Sand Mold) and so on, but Not all the sand can be used for casting. Advantage of lower cost, because the use of the mold sand can be reused; drawback is time-consuming production mold, the mold itself can not be reused, must be destroyed after the finished product can be achieved. Metal mold casting (Die Casting) use a melting point higher raw metal production molds. Which is subdivided into gravity casting, low pressure casting and high pressure casting method. Subject to the melting point of the mold may be cast metal has also been limited. Streamer tank manufacturers, towing tank, Chen Hua Chen machinery provided by the China Machinery Equipment Co., Ltd. Qingdao. Qingdao Chen Hua Machinery Co., Ltd. (www.qdchenhua.com) to provide "press, harbor bollards, adjustable multi-axis tapping drilling machine, CNC multi-axis drilling, gantry milling" and other services, the company has "Chen Hua Machinery, Qingdao, Chen Hua "and other brands. Focus on CNC machine tools and other industries have a higher visibility in Qingdao. Welcomes inquiries, contact: Yuan Xi Chuan.