Casting fever is an acute febrile reaction caused by inhalation of the smelting of copper produced high dispersion of zinc oxide fumes caused. It was reported that lead, tin, antimony, nickel and other metal oxide fumes can also cause disease. Prevent fugitive metal fumes, it is the fundamental way to prevent casting hot. When melting, casting and other operations to enhance the closed, install local exhaust removal equipment bollard 150kn, the recovery of zinc oxide. Strengthen the overall ventilation wear anti-smog masks can be used as complementary measures. With the rapid advancement of technology and the foundry industry, different methods have different casting mold ready content. In the most widely used sand casting, for example, mold preparation, including molding material preparation and modeling, made two core tasks. Sand casting to shape, making the core of a variety of materials, such as raw sand casting, sand binders and other accessories, as well as by their mixture of the sand, core sand, paint and other materials collectively known as modeling, modeling material preparation tasks in accordance with the requirements of casting, the nature of the metal, select the appropriate raw sand, binders and accessories, and a certain percentage of them into sand and core sand mixed with certain properties. Commonly used sand equipment sand mills, counterflow mixer and continuous mixer. The latter is designed for mixing chemical Sand design, continuous mixing bollards, sand speed. Is made more economical methods of rough shape, the shape of complex parts can show its economy. Such as automotive engine blocks and heads, ship propellers and exquisite works of art. Somewhat difficult to cut parts, such as gas turbine parts nickel-based alloy can not be formed without casting method. For casting engineers and mechanical design engineers, heat treatment is a very meaningful, but a very high value for ways to improve the material quality, by the heat treatment can alter or affect the organization and the nature of cast iron, and can get higher strength, hardness bollard manufacturers to improve the wear resistance and so on. Since the purpose is different, very much the type of heat treatment, can be mainly divided into two basic categories, the first category is the organizational structure will not change and does not change through the heat treatment or should happen, the second is the basic organizational structure changes by . The first heat treatment program 750kn bollard, mainly used to eliminate stress, and this stress is due to the different conditions and conditions caused by cooling in the casting process. Organization, strength and other mechanical properties, which does not change significantly due to the heat treatment. 250kn bollard, bollard, 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.