Warp Tying and Knot Weaving
category
Warp tying joins the ends of a new warp to the corresponding ends of the previous warp still threaded in the loom by knotting old and new ends together at the back of the loom, enabling the new warp to be pulled through the heddles and reed by advancing the old warp ends without removing and replacing the threading, dramatically reducing warp change time for repeat fabric constructions compared to full drawing-in of each new warp.
Role
Provides the most productive method for warp change on looms running repeat fabric constructions with the same threading by replacing the time-consuming full drawing-in operation with a much faster knotting operation that uses the existing threading as a guide for the new warp, with warp tying reducing warp change downtime from several hours to 30 to 90 minutes for typical multi-shaft looms and enabling higher loom utilisation through shorter production interruptions.
Subtopics
- Automatic Warp Tying Machines Automatic warp tying machines including Stäubli TOPMATIC and Superba systems clamp on the loom beam …
- Weaver's Knot Characteristics and Requirements The weaver's knot tied by automatic knotters and skilled manual tyers provides a secure join that pa…
- Warp Alignment and Leasing for Tying Successful automatic warp tying requires precise alignment of old and new warp ends in corresponding…
- Warp Pulling Through Heddles and Reed After tying, the new warp is pulled through the existing heddle and reed threading by advancing the …
- Tying Limitations and Conditions for Full Drawing-In Warp tying is limited to repeat fabric constructions using the same threading, yarn count range, and…
- Manual Tying Skills and Operator Training Manual warp tying requires the ability to reliably tie weaver's knots at rates of 60 to 120 knots pe…
- Knot Passage and First-Metre Weaving Quality The first metre of fabric woven after warp tying and pulling contains the tying knots that produce v…
- Tying Machine Maintenance and Knotter Reliability Automatic tying machine maintenance requires daily cleaning of yarn lint from knotter mechanism comp…
- Colour Pattern Verification in Tied Warps Colour verification in striped warps after tying uses visual inspection of the warp sheet with the w…
- Warp Tie-In for Jacquard and Dobby Constructions Jacquard and dobby warp tying requires precise end-for-end correspondence between old and new warp w…