摘要:
A process and an arrangement for re-starting a previously interrupted spinning process in a spinning arrangement is provided. The arrangement includes a drafting unit which can be shut down and also an airjet unit including a vacuum chamber. For the purpose of removing an initially inhomogeneous fiber stream, a staple fiber strand, delivered by the re-operating drafting unit, is temporarily suctioned as waste via a deflecting device after it has left the drafting unit. Only then, when a homogeneous fiber stream has formed, is the staple fiber strand joined with a thread which is transported through the airjet unit. The inhomogeneous fiber stream is removed with the aid of the low pressure in the vacuum chamber.
摘要:
A process and an arrangement for re-starting a previously interrupted spinning process in a spinning arrangement is provided. The arrangement includes a drafting unit which can be shut down and also an airjet unit including a vacuum chamber. For the purpose of removing an initially inhomogeneous fiber stream, a staple fiber strand, delivered by the re-operating drafting unit, is temporarily suctioned as waste via a deflecting device after it has left the drafting unit. Only then, when a homogeneous fiber stream has formed, is the staple fiber strand joined with a thread which is transported through the airjet unit. The inhomogeneous fiber stream is removed with the aid of the low pressure in the vacuum chamber.
摘要:
An airjet spinning arrangement includes a fiber feed channel, which runs into a vortex chamber, and a fiber withdrawal channel, which exits out of the vortex chamber. The fiber withdrawal channel is arranged in a spindle-shaped component, which can be moved away from the fiber feed channel by a moving device. In order to clean the area of the entry opening of the thread withdrawal channel, a cleaning channel is provided, which is directed against the spindle-shaped component and is connected to a pressurized air source. The cleaning channel runs into a ring channel, which surrounds the spindle-shaped component. A first exit opening of this ring channel is designed so that it forms a ring opening surrounding the spindle-shaped component and is directed against the spindle shaped component when the spindle-shaped component is moved away from the fiber feed channel. A second exit opening of the ring channel runs via an intermediary channel into the thread withdrawal channel and is directed against the entry opening of the thread withdrawal channel. Thus, the area of the entry opening maybe cleaned from the inside and the outside in the case of maintenance.
摘要:
A twin unit has two drafting devices for drafting fiber strands and is applicable in a spinning machine. The twin unit includes a common housing for the two drivable drafting devices, whereby the housing is detachably mounted in a machine frame. The drafting devices include a number of drivable bottom rollers and are arranged essentially mirror-symmetrical to one another. Each bottom roller has an area which drafts the fiber strand and is characterized in that the bottom roller has two bearing points. The two bearing points of each bottom roller are arranged one on either side of the area which drafts the fiber strand. In one variation, at least two opposite bottom rollers may form a bottom roller pair, in which the bearing points facing to the plane of symmetry of the twin unit are taken up in a joint bearing take-up. In addition, a top roller in the form of a twin pressure roller may be assigned to a bottom roller pair.
摘要:
A process for preparing a piecing operation in an air jet spinning arrangement is described. The air jet spinning arrangement comprises a drafting device, whose main drafting zone is bordered on its entry side by an apron roller pair and on its exit side by a delivery roller pair. The apron roller pair is connected to a first drive, the delivery roller pair to a second drive. When the spinning process is interrupted, the delivery of a closed staple fibre strand is stopped in the main drafting zone and a new starting end of the staple fibre strand is created. This new starting end is to be pieced together with an end of a thread already spun. To create a new starting end of the staple fibre strand suitable for piecing, the apron roller pair and the delivery roller pair are each controlled separately when the spinning process is interrupted and are shut down one after the other, namely in such a way that in the main drafting zone a new starting end of the staple fibre strand is formed.
摘要:
A process for preparing a piecing operation in an air jet spinning arrangement is described. The air jet spinning arrangement comprises a drafting device, whose main drafting zone is bordered on its entry side by an apron roller pair and on its exit side by a delivery roller pair. The apron roller pair is connected to a first drive, the delivery roller pair to a second drive. When the spinning process is interrupted, the delivery of a closed staple fiber strand is stopped in the main drafting zone and a new starting end of the staple fiber strand is created. This new starting end is to be pieced together with an end of a thread already spun. To create a new starting end of the staple fiber strand suitable for piecing, the apron roller pair and the delivery roller pair are each controlled separately when the spinning process is interrupted and are shut down one after the other, in such a way that in the main drafting zone a new starting end of the staple fiber strand is formed.
摘要:
A twin unit has two drafting devices for drafting fiber strands and is applicable in a spinning machine. The twin unit includes a common housing for the two drivable drafting devices, whereby the housing is detachably mounted in a machine frame. The drafting devices include a number of drivable bottom rollers and are arranged essentially mirror-symmetrical to one another. Each bottom roller has an area which drafts the fiber strand and is characterized in that the bottom roller has two bearing points. The two bearing points of each bottom roller are arranged one on either side of the area which drafts the fiber strand. In one variation, at least two opposite bottom rollers may form a bottom roller pair, in which the bearing points facing to the plane of symmetry of the twin unit are taken up in a joint bearing take-up. In addition, a top roller in the form of a twin pressure roller may be assigned to a bottom roller pair.
摘要:
A holding device for a twin pressure roller of a drafting unit includes a number of bottom rollers. The twin pressure roller includes a stationary axle and two rotatably supported upper rollers. The holding device includes at least one positioning element assigned to the axle of the twin pressure roller and at least one force transmission element, wherein the positioning element is arranged in the area of the center of the axle of the twin pressure roller and thus permits the twin pressure roller to move in a pendulum fashion around the center. The holding device, together with the twin pressure roller may be lifted from the bottom roller. At least one catch bearing for approximate positioning during placement on the bottom rollers is assigned to the twin pressure roller. It may further be provided that the force transmission element is arranged separately from the positioning element and that the catch bearing is integrated into the force transmission element.
摘要:
A process is provided for optimizing the production performance of a spinning machine. Each individual spinning position is separately monitored in relation to the number of end breaks and is adjusted to an optimal production speed. When this process is applied to an air jet spinning machine, the compressed air fed to the spinning positions is adjusted depending on the respective production speed.
摘要:
A process and an arrangement are described for a spinning arrangement comprising an airjet aggregate relating to the preparation for re-starting the spinning process after an interruption of the spinning process. An end of an already spun thread is hereby fed back through the airjet aggregate in the opposite direction to the operational direction of motion to a thread storer. The end of the thread is cut off in the thread storer as waste, by means of which a new thread end is created, which is prepared for the re-starting of the spinning process. The point of separation is prepared by means of blowing compressed air thereon, and the end to be discharged as waste is subsequently separated from the thread by means of pulling the thread apart. The thread storer is preferably designed as a suction tube, to which a nipping line for temporarily holding the thread, and a compressed air nozzle for blowing air the thread are assigned.