The opener adopts elastic swing upper pin, which can reduce the fluctuation range of jaw pressure. If for some reason, the jaw pressure increases sharply, but due to the upper swing of the upper pin, the pressure on the yarn sliver does not increase as much as the delimiting pin; for example, when the jaw pressure is reduced, the yarn sliver is opened due to the lower swing of the upper pin. The pressure is not as much lower as the circling pin, so that the swing upper pin has the advantage of elastic self-adjustment to the jaw pressure. However, to make the elastic jaws control the fiber movement well and give full play to the elastic self-adjusting effect of the soil pins, it is not only still necessary to continuously improve the quality of the skin round, but also measures such as metal plating on the pins to prevent sticking, etc., to reduce The amplitude of fluctuation z should reduce the friction jJ moment Ms, so that the upper pin swings flexibly. The initial pressure and bending stiffness of the compression spring should be reasonably selected. Due to the transmission mode of the apron and the unevenness of the ring material, the size change of MhM2 is objective. Therefore, a reasonable selection of the initial pressure of the compression spring and the bending stiffness of the spring will determine whether the upper pin can fully develop its elasticity. The key issue of mediation.
