Unwinding is the first stage of mother yarn splitting machine production. The state of mother yarn unwinding directly impacts subsequent tension stability and mono filament quality for polyester and nylon tex mono split processing. Poor unwinding management introduces hidden risks from the very beginning.
Unwinding coil placement angle must keep consistent with yarn outgoing direction. Tilted bobbin pulls mother yarn sideways, generating lateral force and twisting yarn before entering cutting zone, leaving residual torsion on split mono filament.
Excessive braking force on unwinding bobbin creates extra resistance. If brake is too tight, yarn bears extra pulling force during unwinding, accumulating tension fluctuation and leading to inconsistent fiber stretching.
Too weak brake causes bobbin inertia overrun. After machine stops, bobbin keeps rotating and releases loose yarn loops. Loops tangle easily and trigger sudden filament breakage once production restarts.
Bobbin holder wear affects unwinding smoothness. Worn bearing on bobbin holder produces jitter during rotation, bringing periodic tension pulse to mother yarn and causing cyclic tex variation on finished mono filament.
Unwinding area should stay clean without scattered yarn ends. Floating loose threads can wrap around rotating bobbin during operation, locking rotation and causing sharp tension spike instantly.
For large-diameter mother yarn bobbins, the braking parameter needs adjustment as yarn consumes. As coil diameter shrinks, inertia reduces and braking force should be reduced correspondingly to maintain steady unwinding tension.
Lanxiang mother yarn splitting machine is equipped with adjustable magnetic brake unwinding system, supporting fine tuning for different bobbin sizes and raw materials, keeping stable yarn releasing state in tex mono split production.
Checking bobbin holder and brake function before startup eliminates most unwinding faults. Simple inspection takes little time but prevents continuous batch quality fluctuation caused by unstable yarn releasing.
Proper unwinding control reduces tension variation at the source. Stable yarn feeding foundation makes later cutting and winding process easier to maintain consistent mono filament specification.
Q1: What defect is caused by tilted mother yarn bobbin during unwinding? A1: Side pulling force creates torsion and leaves residual twist on split mono filament. Q2: What risk comes from too strong brake force on unwinding bobbin? A2: Extra resistance increases tension fluctuation and uneven fiber stretching. Q3: What happens when bobbin brake force is insufficient? A3: Bobbin continues rotating after shutdown, forming loose yarn loops and tangling risk. Q4: How does worn bobbin holder bearing affect production? A4: Rotation jitter brings periodic tension pulse and cyclic tex variation of mono filament. Q5: Why adjust brake setting as mother yarn coil diameter decreases? A5: Smaller bobbin has lower inertia and requires weaker brake to keep unwinding stable.