Yarn end cutting method for spinning machine

Abstract

When doffing stops, to make the ring bar (17) be at the position corresponding to the pontes which connects with the yarn tail cutting part (28) relative to the hasp base (24b). Under the state that the cop (38) connecting to the yarn (Y) of the steel wire ring (T) wind until the position under the pontes, to stop the hasp (11). Under the state of stopping the hasp, to pull up the cop (38) from the hasp through the doffing device. During the midway of pulling up the cop (38), to make the yarn tail cutting part (28) ascend with the cop. When pulling up the cop (38) from the hasp through the doffing device, to make the ring bar ascend. To hold the mentioned yarn (Y) between the yarn tail cutting part (28) which has been divorced from the cop (38) and the hasp base (24b). To cut off the mentioned yarn (Y) by means of cutting part (30). Thus, to reduce the residual yarn tail on the hasp base and the yarn leakage cutting (pig 1B).

Description

technical field [0001] The invention relates to a yarn tail cutting method of a spinning machine. Specifically, the above-mentioned spinning machine includes a ring spinning frame or a ring twisting machine capable of raising and lowering a yarn end cutting member along a spindle bar extending above the spindle base. The yarn tail cutting member includes a bobbin insertion portion and a cutting portion located below the bobbin insertion portion. The end cutting part and the spindle base are able to hold (clamp) the yarn from the bobbin to the traveler. Background technique [0002] Spinning machines such as ring spinning frames or ring twisting machines require automatic tube changes when they are full. In other words, the spinning machine is required to automatically perform an operation of replacing a bobbin that has been wound with a yarn with an empty bobbin. Specifically, the spinning machine requires that the yarn be automatically wound onto an empty bobbin when it ...

AI Technical Summary

Problems solved by technology

Therefore, when the yarn tail cutting member 52 after leaving the bobbin 55 comes into contact with the spindle base 53a, the yarn Y cannot be grasped (clamped) by the yarn tail cutting member 52 and the spindle base 53a easily.

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