Resolving Edge Tension Drift and Temple Mark Variations on Wide Air-Jet Linen Weaving Warps
Wide air-jet linen weaving requires synchronized relay nozzle pressures and precise temple pin geometry to stop edge tension drift and edge damage.
Pin Ring Density
Pin Spacing
The concentration of steel pins per unit length or area on drafting faller bars and comb rings governs fiber parallelization during yarn preparation. In flax spinning preparation, pin ring density determines the degree of mechanical opening and impurity removal achieved during hackling and gilling operations. High pin concentration handles fine flax fibers by splitting coarse bundles into individual strands, whereas lower density suits coarse fiber preparation.
Matching pin layout to raw material grade prevents fiber breakage while ensuring thorough alignment.
Drafting Control
Mechanical pin fields hold individual flax fibers during drafting to prevent uncontrolled fiber slipping between drafting rollers. Adjusting pin ring density controls the drafting force applied to the flax sliver as it passes through the gill box. Worn or bent pins create localized density variations that produce thick and thin sliver defects.
Maintenance schedules dictate regular pin inspection and faller bar replacement.
Fiber Orientation
Proper pin distribution aligns bast fibers parallel to the sliver axis, enhancing yarn strength and evenness. Production records track pin ring density settings alongside sliver nep counts and short fiber percentages. Optimized pin spacing minimizes fiber waste during combing cycles.
Fine spinning success depends directly on precise pin field selection during carding and gilling.