Material conveyor is called belt assembly line, also called belt conveyor, it's an indispensable economical conveying and logistics equipments for the assemble line with rhythm. It's divided into heavy belt conveyor such as mine belt conveyor and light belt conveyor such as used in electronics, plastics, food, light industry, chemical medicine, etc. It has the characteristics of large conveying capacity, long distance conveying, simple structure, easy operation, etc. which is convenient for automatic control and operation.