The machine adopts microcomputer servo control,fsat length adjustment,having the function of automatic counting,toeletric trracking,fasle alarm.The host discharging of material is driven by variable frequency motor,changing speed smoothly,high speed downtime,safe and reliable,intelligent control constant temperature,even bottom sealing tical and solid,rewinding adopts frequency conversion,toelectric automatic control,achieving the effect that unwinding coincides with rewinding.