The DD6 bobbin hangers is our new production.We have designed and developed by understand the problems in used of domestic textile industry and absorb  the design virtue of the demestic and foreign.This production can be used on all kinds of the spinning without adjust the damping spring,which eliminates the working procedure of adjusting the bobbin hanger speed in turn change the spinning varieties, which can reduce the labor intensity and improve working efficiency.The roving unwinding tension can keep consistently from the big yarn to  a small yarn when using DD6A bobbing hanger, thus it is to avoid the roving suddenness drafting.It has a significant effect for improving the yarn, improving the level of yarn quality and economic benefits.