Consumers of food and its packaging requirements are constantly improve. Foremost among them, high security. Therefore, wanda reminded the castor industry need more attaches great importance to and vigorously develop production of casters, industrial casters. Minimize the trundle operation error, avoid to produce unqualified products. Society is becoming more and more widely applied in the development of castor, wanda will increase in the future development of the design concept of castor, widen the application range of the castor, make people's lives more secure and convenient. Industrial caster wheel is mainly used in plant, machinery and equipment, has the very high impact resistance and strength as a whole. As China's market economy high speed development and the improvement of people's life quality, the market for microwave food, leisure food and frozen food such as increasing demand for convenience foods. Directly lead to the development of the related food packaging industry, the domestic food and castor production in the industry a long time to maintain positive growth. Caster, and the development of industrial casters directly led to the growth of the national economy. In 2010, according to statistics, the domestic food and castor industry output value reached 130 billion yuan, and market demand reach RMB 200 billion. According to the Chinese castor and industrial castor industry association statistics, in 2006, domestic food and packaging castor industry sales hot. Sales in 2005, 673. 22 RMB 700 million on the basis of growth. By 96% to 828. 3. 8 billion yuan, the growth rate of record in recent years. Castor security is a big in the national economy and people's livelihood, is closely related to the importance of casters, industrial casters production will undoubtedly. In China's 1. 3 billion people behind food supplies, is the large castor production market. Shanghai castor plant, universal wheel, casters, universal casters