1) Winding from Spinner's Packages to Cones
2) Winding from Cones to Warp(Warping)
3) Applicaton of Size and Lubricant to Warp(Slashing)
4) Drawing-in or Tying-in
2) Winding from Cones to Warp(Warping)
3) Applicaton of Size and Lubricant to Warp(Slashing)
4) Drawing-in or Tying-in
- The primary objective of the warping process is to provide a continuous length of yarn from individual wound yarn packages, in sheet form to a beam for the succeeding process. There are several types of warping techniques, including: ball, direct, draw, indirect (also called sectional) and sample warping. This review focuses on the three most popular process types, direct, indirect, and sample warping.
- When utilizing any technique in the warping process it is important to minimize end breaks, keep a constant and uniform tension on the yarns, keep a constant yarn speed, and insure quick response braking of the warper. These factors play a large role in the quality of the warp yarns, which in turn influences the runability of that warp yarn in the succeeding process.
- Most modern warpers are equipped with electronic stop motions which stop the warper as soon as a broken end is detected. It is crucial that the braking system is fast enough to stop the warper before the end reaches the beam. The end is much harder to find and correct once it has been wound onto the beam. Today's braking systems allow the beams to stop before one full revolution has occurred on the warp beam, in a direct system, or on the pattern drum in an indirect system.
- Advancements in electronic technology have made these factors easier to control,but ensuring the quality of the warp beam is still the responsibility of the operator. Warping machines are capable of reaching well over 1000 yards per minute and are now able to stop after an end break without advancing more than one full revolution of the section beam. Warping has gained new respect in weaving plants, and is rightfully referred to sometimes, as the cornerstone of good weaving preparation.