Wind Yarn Preparation: Terms and Definitions for Winding, Warping, and Packaging, Quizzes of Materials science

Download Wind Yarn Preparation: Terms and Definitions for Winding, Warping, and Packaging and more Quizzes Materials science in PDF only on Docsity! TERM 1 Warp Yarn Preparation DEFINITION 1 WindingWarpingDrawing-In/Tying-InSizing/Slashing TERM 2 Purpose of Winding DEFINITION 2 You want to transfer the package efficiently from one to another TERM 3 Why Weak Spots are Critical? DEFINITION 3 Economic, don't want to yarns to break in weaving TERM 4 Functions performed by winding machine (5) ? DEFINITION 4 Supply: holds the packages of yarnCreeling: Replacing exhausted suppliesKnotting/Slicing: knotting the breaks, slicing the knotsWinding: transferring the packages as they get doneDoffing: Removing the finished (full) packages TERM 5 Goals for a Package? (4) DEFINITION 5 Stable Uniform Tension Optimized Density Maximum length of yarn TERM 6 Wind Angle DEFINITION 6 Inverse Tangent of (Traverse Speed divided by the Wind Speed)Tan-1(T/W) TERM 7 Typical Wind Angle? DEFINITION 7 3-10 degrees TERM 8 Flanges DEFINITION 8 On the ends of the yarn packages Prevent yarns from slipping off the edges Provide Support TERM 9 Winding Speed: Define? DEFINITION 9 length per unit time, usually meters/min TERM 10 Winding Speed: Eqn ? DEFINITION 10 pi*D* ND= DiameterN= # turns TERM 21 Pros: Precision Winding DEFINITION 21 Ordered yarn makes for a easier production Unwinding is easier due to uniformity More density package meaning the volume increases less rejection b/c of less overthrow Easier to avoid ribboning TERM 22 Cons: Precision Winding DEFINITION 22 Smaller Package size = used for a purpose like sewing thread TERM 23 Step Precision or Intermediate DEFINITION 23 Combo of Random and Precision TERM 24 Intermediate or Step Precision Winding: Why it's used? DEFINITION 24 use the precision winding feature of a approximately constant wind angle B/c of the approx. constant wind angle= consistent pkg density better than Random winding TERM 25 Intermediate or Step Precision: How it works? DEFINITION 25 The wind ratio changes in step (incrementally) Wind angle changes within a step The wind ratio is reduced to make corrections for the wind angle