Unwinding adopts magnetic powder brake, roll diameter calculated automatically by the PLC automatic tension control.
放卷采用磁粉制动器，由PLC自动计算卷径实现自动涨力控制。
The disk type unwinding mechanism has simple structure, small volume, convenient maintenance, safety and reliability, which is also suitable for drum material with large rolling diameter.
该机构结构简单，体积小，维护方便，安全可靠，同时还适应大卷径的卷筒料。
Tension varies with changing of the diameter of coiling block in winding and unwinding processes of packaging machinery. Constant tension is the key to guarantee the product.
包装机械在收放卷过程中，卷材卷筒直径的变化会引起张力的变化，而恒定张力是保证产品质量的关键。
Tension varies with changing of the diameter of coiling block in winding and unwinding processes of packaging machinery. Constant tension is the key to guarantee the product.
包装机械在收放卷过程中，卷材卷筒直径的变化会引起张力的变化，而恒定张力是保证产品质量的关键。
应用推荐