Winding bobbin exchange using auxiliary roller - to take up yarn during exchange thus reducing waste

摘要

During the replacement of a fully wound bobbin by a fresh empty bobbin, yarn is guided onto an auxiliary winding roller. Initially, the yarn is transferred to the auxiliary roller without the yarn being traversed and the full bobbin is replaced by the empty bobbin. The axially roller is then reversely rotated so that the yarn can be drawn into a path (as shown) adjacent the empty roller. The auxiliary roller is then rotated in the winding direction, and the transverse is started. The yarn is then laterally shifted into engagement with the empty winding bobbin and with the transverse to recommence the main winding again. The bobbin change over time is reduced to 8 seconds and yarn waste is correspondingly reduced.