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The curvilinear drafting system of 3 over 3 with pressure bar is suitable for cotton,cotton type fiber and midfiber and their blends of 22-76mm.All kinds of slivers processed by this machine can be high quality after the last passage.The gear box of driving system is in fully-enclosed oil bath.Rocking the handle of the drive changing gear in the headstock can adjust draft range,Which is convenient and reliable.The new construction for spring loading is adopted to improve stability and reliability.The new construction design of sliver creel is adopted to be nice in appearance and convenient in operation.The tension can be regulated according to different spinning requirements.The electric system is controlled by PLC to facilitate maintenance and improve reliability of the controlling system. lnverter and operator's interface panel is optional to make operation easier.The stable and reliable automatic can change device greatly reduces labor intensity.

The headstock driving gear box adopts manual gear change structure.The crown and draft gears are all enclosed in oil-bath gear box, suitable for high speed.Two sets of the gears in the box are used for speed change drive to adjust the weight deviation of the sliver. Outside the box there are two rocking handles and disc counter. Revolve the handle to turn the disc counte, displaying the actual engagement of the two sets of gears inside the box.The conventional way of adjusting the sliver weight deviation by mounting and dismounting the draft gears has been changed.Operation is simplified and the number of change gears is reduced. ln addition, a pair of step gears for fixing center-to-center distance is fitted outside the box. Another 6 pairs of step gears are used for substantial adjustment of the total raft.The total draft can be 4.013~13.556 times for the spinning process requirements.