Method for operating an open-end spinning device
View Patent ↗The invention relates to a method for operating an open-end spinning device ( 1 ), comprising a spinning rotor ( 2 ) and an opening roller ( 12 ), which can be controlled so as to be driven individually independently of one another, wherein after an interruption in the spinning process takes place as a result of the detection of the absence of a thread, a piecing operation is initiated, comprising a piecing process, in which an upper thread passes through a fiber ring formed in the spinning rotor ( 2 ) and is connected to the latter, and a subsequent drawing-in accumulating process which serves to reduce a thin point in the thread following the piecer, wherein during the piercing operation, the opening roller ( 12 ) is temporarily driven at a piecing speed which is higher than the operating speed of the opening roller ( 12 ).
1. Method for operating an open end spinning device ( 1 ), comprising a spinning rotor ( 2 ) and an opening roller ( 12 ), which can be driven individually, controlled independently of one another, wherein after an interruption of the spinning process has taken place as a result of the detection of the absence of a thread, a piecing process is introduced, comprising a piecing up process, in which an upper thread passes through a fiber ring formed in the spinning rotor ( 2 ) and is connected thereto, as well as a subsequent drawing in accumulation, which is used to reduce a thin point in the thread following the piecing, characterized in that during the piecing process, the opening roller ( 12 ) is temporarily driven at a piecing speed, which is above the operating speed of the opening roller ( 12 ).
2. Method according to claim 1 , characterized in that the piecing speed of the opening roller ( 12 ) is reached prior to the beginning of the piecing process.
3. Method according to either of claims 1 or 2 , characterized in that the piecing speed of the opening roller ( 12 ) is maintained during the complete working off of the drawing in accumulation.
4. Method according to claim 3 , characterized in that the speed control of the opening roller ( 12 ) during the piecing process and the process of the drawing in accumulation take place independently of other parameters influencing these processes, by means of a control mechanism ( 21 ).
5. Method according to claim 1 , characterized in that the piecing speed is between 10% and 40% above the operating speed of the opening roller ( 12 ).