Yarn Introduction
The core action of loom processing involves carrying the crosswise yarns through the divided warp yarns to form the fabric. The weft insertion is the phase of the loom cycle where the filling yarn is propelled across the width of the machine to build the structure of the linen. This step takes place after the warp yarns have been separated by the harness frames.
It determines the maximum speed and productivity of the fabric mill.
Insertion Mechanism
Different types of looms use different methods to transport the yarn, including rapiers, projectiles, or jets of compressed air. In flax processing, rapier systems are preferred because they grip the flax yarn firmly and guide it gently across, which is necessary due to the irregular and stiff nature of flax fibre. Air jet machines struggle with linen because the variations in yarn thickness create unpredictable drag in the air stream, leading to failed insertions.
The selection of this mechanism affects the yarn twist requirements.
Process Efficiency
Failed insertions trigger immediate loom stops to prevent defects in the linen cloth. The insertion rate is monitored continuously to optimize speed and minimize yarn waste. This metric defines the fabric factory output.
