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Page 67 - Shawl Weaving Artisan - TP
P. 67

    Textile & Handloom                                                                Exercise 1.4.38

                Shawl Weaving Artisan - Defects and Yarn Quality

                Sectional warping calculations

                Objectives : At the end of this exercise you shall be able to
                •  calculate the creel capacity, number of sections, number of patterns per section, width of warp, and total
                  number of ends during sectional warping.

                  Requirements

                   Tools/Equipment’s/Instruments                      Materials
                   •  Warping drum or sectional                       •  Bobbins                            - 1 No.
                      warping machine                   - 1 No.       •  Notebook                           - 1 No.
                   •  Creel                             - 1 No.       •  Pen                                - 1 No.
                   •  Cones                             - 1 No.

                PROCEDURE
                Given example for calculation Table 1

                                                                Table 1
                   S. No.                  Parameter                                       Value
                     1     Total ends required                         2400 ends
                     2     Section width (on warp beam.)               1 inch
                     3     Creel capacity                              100 cones/bobbins per creel
                     4     Warp beam flange width                      50 inches
                     5     Ends Per inch (EPI)                         60

                Step-by-Step calculations                                = 60 ends per section
                1  Width of Warp (On Reed / Beam)                     Ends per section = 60.
                               Total   Ends                           4  Number of  Patterns per  Section  (Cone  Creel
                Width   of  Warp
                                  EPI                                   Loading)
                               2400                                   Given Creel capacity = 100 cones
                Width  of     Warp
                                60                                    So total possible  number of ends that can run
                                                                      simultaneously = 100 ends
                       = 40 inches
                                                                      We need 60 ends per section, which is less than 100, so
                Warp width = 40 inches                                creel capacity is sufficient.
                2  Number of sections                                 If ends per section were more than 100, we would have
                Sectional warping uses 1 inch section width, so:      to wind in multiple patterns (multiple creel loads).
                                     Warp  Width                      In this case:
                Number  of      Sections
                                    Section  Width                                                    Ends   per   Section
                                                                      Number of Patterns per Section   =
                                    40                                                                 Creel   Capacity
                Number    of   Sections                                                              60
                                     1                                Number of Patterns per Section  =

                   = 40 sections                                                                     40
                                                                                                   = 0.6 ≈1 approx.
                Number of Sections = 40
                                                                      Only 1 pattern per section needed.
                3  Ends per Section                                   5  Creel capacity check
                                      Total   Ends
                Ends   per   Section                                  Since ends per section (60) < Creel capacity (100), only
                                  Number  of      Sections            single creel loading needed per section.

                                  2400
                Ends   per   Section                                  6  Summary of calculations (Table 2)
                                   40
                                                                                                                    55

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