Textile Calculations | All Formulae of Textile Calcualtions for Spinning/Weaving/Knitting

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Important formulas for blow room section:


                                                                      Amount of Trash removal
Cleaning Efficiency of Blow room section: -------------------------------- x 100
                                                                      Total amount of Trash

                       Length of Lap (yds)                 Unit weight
Lap Hank : -------------------------------- x --------------------------
                          Unit length                          Weight of Lap (lb)


                                       Surface speed of calendar roller x 60 x Eff % x wastage % x scatcher number
Production of Blow room/hr : ---------------------------------------------------------------------------------- ,lb
                                                               36 x 840 x hank

                              D    Knock off Wheel       Warm Wheel
Length of Lap : ----- x ------------------------ x -------------------, yds (D= Dia of Bottom calendar roller)
                           36            Change Wheel       Single Warm

Important Formulas for Cotton Carding Section:


                           Present DCP x Present Hank           Present DCP x New Sliver weight
Required DCP :  ---------------------------------- =      -------------------------------------------
                                Required Hank                            Present Sliver weight


                        Lap Length (Yds) x 1 lb
Lap Hank :  ------------------------------------
                       840 x Lap weight (lb)


                                          Sliver Length (Yds) x 1 lb
Carded Sliver Hank :  ------------------------------------
                                          840 x Sliver weight (lb)


                          Carded Sliver Hank           Feed or Lap Weight       Mechanical Draft x 100
Actual Draft :  ------------------------   =    ---------------------------  =  -----------------------
                           Feed or Lap Hank            Carded Sliver Weight           100 - wastage


                              Actual Draft x 100 - wastage            Draft Constant
Mechanical Draft : ----------------------------------     =   ---------------------
                                           100                                              DCP


                                                     Speed of the circumference of Doffer (inch/min) x Efficiency x 60
Production of Carding Machine:  --------------------------------------------------------------------------, lb/hr
                                                                                     36 x 840 x Hank

or

                       Speed of the circumference of Calendar roller (inch/min) x Eff x 60 x Tension Draft
Production of Carding Machine:  --------------------------------------------------------------------------, lb/hr
                                                                                     36 x 840 x Hank