Analysis of the Range of FP Voltage Value and the Mechanism of Levelling Nubs
In order to verify the FP voltage range recommended by Uster theory,FP voltage val-ues that are significantly larger or even beyond the range recommended by the theory are used,the quality change of the output drawing sliver with FP flared mouth from different counts are compared.It shows that when the absolute value of FP voltage is larger,the appearance quality of the drawing sliver from the FP flared mouth of a smaller count is better.The matching basis of the quantity of cotton slivers and the size of flared mouth,and the levelling mechanism of au-to-levelling drawing frame are analyzed.It is pointed out that the FP voltage value ranges from-4000 mV to-6000 mV,the count of FP flared mouth is small,the density of the cotton sliv-er is better,and the TP-N neps are less,which can play the role of auto-levelling system.
auto-levellingdrawing frameFP flared mouthFP voltage valuedensitynubs
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