Optimizing Warp Sizing Polymer Add-on Levels for Air-Jet Weaving Efficiency
Optimizing sizing polymer add-on levels balances yarn hairiness reduction against shed dusting to maximize air-jet loom efficiency and lower desizing costs.
Air-Jet Loom Weft Insertion
Propulsion Method
Pneumatic transport systems move filling yarns across the weaving machine width by utilizing compressed air pulses. In high speed air-jet loom weft insertion, a main nozzle launches the yarn into the shed while auxiliary nozzles maintain momentum. This process relies on a profiled reed to guide the air stream and prevent dissipation.
Airflow stability dictates the maximum weaving width.
Sequential Step
Timing intervals govern the release of air from the main and sub-nozzles in precise synchronization with the shedding motion. After the shed opens, the air-jet loom weft insertion begins with the acceleration of the yarn tip. Auxiliary nozzles fire in groups to carry the yarn across the fabric width.
Success requires that the yarn reaches the receiving side before the shed closes. This window of time shrinks as machine speeds increase. A suction device captures the leading end of the yarn to ensure proper tension before the reed beats up the pick.
Energy Usage
Compressed air requirements represent the primary operational cost for this weaving technology. While air-jet loom weft insertion offers the highest production rates, it consumes more energy than projectile or rapier systems. Pressure settings must match the yarn count and surface friction to avoid excessive turbulence.
Leakage in the air delivery system lead to measurable efficiency losses.
Fabric Constraint
Insertion limitations arise when processing heavy or highly textured yarns that resist pneumatic transport. Dense fabrics might also restrict the air flow required for air-jet loom weft insertion to function correctly. Fine filament yarns and standard spun cottons perform best under these conditions.