Reconciling Raw Flax Import Bales against Spun Yarn Output Yields
Reconciling raw flax imports against spun linen output relies on oven-dry mass adjustment, hackling yield tracking, and lot-specific transaction certificates.
Drawframe Blending Audit
Audit Protocol
Quality control procedures verify the proportionality of different fibre types during sliver preparation to ensure uniform yarn characteristics. A drawframe blending audit confirms that flax and secondary fibres are combined according to the technical specification sheet before spinning begins. The procedure examines drawframe outputs by weighing segment samples at scheduled intervals.
This action checks the exact percentage of flax and cotton fibres present in the blended sliver.
Blend Consistency
Mechanical drawing frames combine multiple sliver inputs into a single uniform strand. To verify the composition during a drawframe blending audit, technicians dissolve the soluble component from sample slivers using standardized chemical agents in the mill laboratory. This test calculates the remaining dry weight to confirm the blend ratio matches the buyer’s order.
Variations exceeding two percent trigger machine calibration. Corrective action requires adjusting the relative feed rates of the carded slivers at the intake rollers to bring the blend back to the target ratio specified in the mill’s internal recipe. This step prevents unevenness in the final dyed cloth.
Discrepancy Margin
Discrepancy margins establish the operational limits within which a batch is accepted. If a drawframe blending audit reveals that the blend ratio deviates beyond the contract tolerance, the production run is halted and quarantined. This prevents the downstream spinning of yarn with uneven dye affinity or unequal shrinkage during finishing.
The final audit report is filed in the mill’s quality management log to clear the lot for the spinning floor.