The application of material handling machines is of great significance in production. This is mainly because the amount of materials handled is very large. In some steel complexes, the total amount of raw materials, fuels, semi-finished products, finished products, and wastes that need to be moved for each ton of steel produced It often exceeds 50 tons; In addition, the cost for material handling is high. The cost for material handling in industrial countries often accounts for about 25% of the product cost. The material handling consumes more labor, and in low-mechanized enterprises, porters often It accounts for more than 15% of the total number of workers; it must be transported by machinery when carrying heavy loads that cannot be carried by humans and working in areas with high temperature or radioactive substances. Therefore, sufficient attention should be given to the material handling system in production, and advanced and applicable material handling machinery should be adopted as much as possible to reduce labor intensity, reduce product damage, protect workers' health, increase labor productivity and product quality, and reduce production costs.
In daily life, some simple and light material handling machines, such as various trolleys, are often used. Humans initially carried materials by carrying, carrying and carrying shoulders. Afterwards, they gradually used animal power and created simple machines such as levers, gongs, pulleys, and trolleys.