Abstract

The calculation of warping spools of warp-knitting machines

Highlights

  • One of the main ways for increasing warp-knitting machines efficiency is to reduce their downtime due to base thread recharge and to reduce dynamic loads caused by an unstable regime [1...15]

  • Having predetermined the warped filaments tension according to formula (13) we can calculate the safe diameter of filament winding onto a spool

  • — The obtained formula allows to determine the relationship between the parameters of thread wound on a warping spool, its tension, shaft diameter structural dimensions and diameter of bobbin winding;

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Summary

Introduction

One of the main ways for increasing warp-knitting machines efficiency is to reduce their downtime due to base thread recharge and to reduce dynamic loads caused by an unstable regime (starting, braking, etc.) [1...15]. Let suppose that after warping the filaments have the same tension degree and are arranged in concentric layers of closed circles lying within planes perpendicular to the bobbin axis In this case, the bobbin butts are influenced with total force Q acting on the part of the fibers that are in contact with the butts. The equation (13) defines the relationship between the parameters of thread a bobbin, its tension, the shaft design parameters and the winding diameter This formula allows to determine (at the given bobbin design and the given maximum tolerated stress of its shaft material) the maximum allowable tension of filaments during spool warping. Having predetermined the warped filaments tension according to formula (13) we can calculate the safe diameter of filament winding onto a spool

Results
The KT value is found from the condition
Conclusions
Full Text
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