Our casting production has won nine years ranked first in the world's ports streamer trough, I deserved national plans of casting a big country in the world. But such a casting producing countries, still has to import from overseas casting products. This is not due to the lack of the total cast, but the amount of high-end casting products no way satisfied the requirements of the domestic production. In fact there are more than the number of low-end casting nobody cares. Low-end casting foundry overcapacity, poor product sales line, affecting the casting company's capital returns, the implementation of re-production, continue to move the company's impact on the progress of the casting. Casting industry to promote the progress of the port towing tank, the excess should be low-end can often translate into high productivity, with particular attention to the progress of a certain stage of the domestic shortage of high-end features of the device, to the satisfaction of the market, thus enhancing the casting industry progress. Casting metal forming theory often called liquid molding casting, casting forming technology has a long history. As early as 5000 years ago, our ancestors will be able to cast copper and bronze. Casting is the most widely used metal liquid molding processes. It is the liquid metal is poured into the mold cavity, wait until the cooling and solidification, to obtain a certain shape or parts of the method blank. Casting very versatile, has been applied to the metal and the whole machinery and electronics industries, and its use is a growing trend. Specific use, construction, hardware, equipment, construction machinery and other large machinery, machine tools, shipbuilding, aerospace, automotive harbor towing tank equipment, motorcycles, electronics, computers, appliances, lighting and other industries, many of which are ordinary people all day contact but do not understand metal objects. Port towing tank supply, Chen Hua machinery (certified), harbor towing tank provided by the China Machinery Equipment Co., Ltd. Qingdao Chen. Qingdao Hua Chen Machinery Co., Ltd. (www.qdchenhua.com) is Qingdao, a leader in CNC machine tools over the years, the company implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Chen Hua Machinery leadership in the staff warmly welcome all inquiries negotiations to create a better mechanical Chen Hua future.