Qingdao Zhida environmental protection smelting equipment limited company was founded in August 1990, is a collection of scientific research, production and sales in one of the high-tech enterprises, the company mainly produces “melting plant equipment, waste heat and pressure utilization device, environmental protection dust removal equipment, post-furnace feeding equipment, pouring equipment and rock (mine) cotton equipment” and other products. Products are sold well throughout the country and many Asian countries (India, Pakistan, Vietnam, Russia, etc.). Our company specializes in the production of casting bales. It is a professional manufacturer in the field of casting bales in China. Currently, we can produce 70 tons of electric ball iron bales and 200 tons of bottom cast ladle. Our casting bag adopts worm gear/worm transmission, which can achieve reliable self-locking, and there will be no problem of “knocking head” during pouring; the worm gear adopts cast aluminum bronze in line with the national standard ZQAL9-4, which has high strength and good wear resistance; the safety factor of the main stress parts reaches more than 10 times. Commissioned by the National Foundry Machinery Standardization Technical Committee, the company has presided over the drafting and revision of a number of national standards and standards for foundry machinery, such as “molten steel pouring bag”, “iron casting bag”, “desulfurization package”, “lifting package”, etc., and was rated as “deputy director unit of the National Foundry Machinery Standardization Technical Committee Smelting and Pouring Sub-standard Committee”