Woven Greige Loom Minimums and Dyehouse Vessel Capacities
Aligning woven greige warp minimums with dyehouse vessel capacities requires calculating dry mass yields and vessel fill limits to prevent shade variation.
Tying In
Loom Preparation
Knotting individual threads from a finished warp beam to a new warp beam connects the two sheets together at the back of the loom. In tying in, the process allows a new warp sheet to be drawn through the existing harness and reed without re-threading them. This step is performed when the pattern and yarn count of the new run match the previous one.
It eliminates the need for manual draw-in procedures and represents a major labor-saving step in high-volume weaving mills.
Mechanical Action
Automatic knotting machines travel across the width of the yarn sheet to tie each pair of threads together. The machine selects one yarn from each sheet, cuts them and ties a secure knot before moving to the next pair. This action occurs at speeds of up to three hundred knots per minute.
Production Flow
Downtime is minimized by avoiding the need to draw thousands of yarn ends manually through the loom components. Re-threading a loom can take several hours, whereas this knotting method can be completed in less than one hour. This efficiency allows the mill to resume weaving quickly and maintain high machinery utilization rates.
Efficiency Check
Quality of the knots and the tension of the yarn sheet must be verified before weaving restarts. Weak or poorly tied knots can break as they pass through the reed, which causes machine stops and fabric defects. Loom operators run the first few meters of fabric slowly to ensure that every yarn passes through the loom correctly.