Drawing for Open-End Spinning Feed Preparation
topic
Sliver preparation for open-end rotor spinning requires final drawing delivery counts of Ne 0.08 to 0.15 with sliver CV percent below 3 percent, achieved through two-pass drawing with autolevelling on the second passage to correct count variation from the first passage, producing the high-quality sliver count consistency that enables rotor spinning to achieve yarn count CV percent below 2 percent at production speeds above 100,000 rpm.
Role
Establishes the sliver quality prerequisite for achieving the yarn count consistency and evenness performance of open-end rotor spinning at high production speeds, with sliver count CV percent being directly transferred to yarn count CV percent in rotor spinning that lacks the averaging effect of multiple spindles feeding from a single sliver that characterises ring frame yarn count averaging.
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