摘要:
The rotor cover (2) of an open-end spinning machine possesses a projecting cover cap (3) with a side recess (4), which, on its end remote from the rotor cover is bordered by a collar (40). This possesses both in the partial zone of its circumferential area containing the collar (40), and in the remaining circumferential zone, essentially the same outer contour. The recess (4) begins, relative to the direction of rotation (f) of the spin rotor 1, between 30° and 130° after the discharge opening (50) of the fiber feed conduit (5) and ends at a section of the of the wall (51) protruding from the radial surface (20) of the rotor cover (2). The recess (4) extends to a radial surface (20) of the rotor cover (2) which radial surface (20) covers the open side of the spin rotor.
摘要:
A procedure and apparatus for start-up spinning of a thread in an open-end spinning apparatus is provided. A first and second auxiliary roll-pair are presentable within a thread course during start up spinning. A source of a suction air stream within the spinning apparatus is positioned below the first and second roll-pairs. The source of suction air stream creates a suction flow of air to induce the thread end into the spinning apparatus for start up spinning. A control center is in communication with the first and second roll-pairs, so that the control center controls them. A thread storage unit is positioned between the first and second roll-pairs proximal to the course of the thread. The thread storage unit is in communication with the control center so that the thread storage unit is activated to store and release the thread during start up spinning.
摘要:
For the piecing of a yarn in an spinning device, various computation formulas are stored in a control device into which calculated values as well as special data converted into numerical values relating in particular to the fiber material, the yarn and the spinning element are first entered to compute and select settings for operations relevant to the piecing process. A feeding device feeding a fiber sliver to the spinning device is first brought to a high pre-feeding speed by means of such pre-programmed values and converted data. From this pre-feeding speed, the feeding speed is greatly decelerated in steps to its piecing feeding speed in coordination with the release of the yarn to be fed back into the spinning element.
摘要:
Upon the start of spinning a thread (F), two auxiliary roll-pairs (20, 21) bring an end (E) of the concerned thread into a preparatory position (P) within an entrainment zone of a suction induced air stream, which stream enters an open-end spinning apparatus (10). At this point, in order to uphold the continuity of the thread, the said auxiliary roll-pairs (20, 21) are stilled in their revolution. With renewed drive, the second roll-pair (21), located more distant from the open-end spinning apparatus (10), causes a reversely directed thread movement, whereby, between the two said roll-pairs (20, 21), a thread surplus is created. This thread accumulation between the roll-pairs 20, 21 is retained in a pneumatic thread storage unit (23). The second auxiliary roll-pair (21) is then stopped from further rotation. The first auxiliary roll-pair (20), proximal to the open-end spinning apparatus (10), now opens itself, thus freeing its clamp on the thread. Subsequently, the action of the air stream in the thread storage unit (23) is ended by means of a positioning device (4), or alternately, the air flow may be reversed in its direction. The thread, which is released (F) by the described action, is picked up by the suction induced air stream which is entering the open-end spinning apparatus (10) and contacts a fiber collection surface (101). At this location, the thread end interbinds with incoming fibers. The thread, now renewed in continuity, is removed from said surface with the aid of the second auxiliary roll-pair (21) and is delivered to a main withdrawal roll-pair (13). In case the diameter of the spin rotor be changed, complementarily, the size of the accumulation of the stored thread between the auxiliary rolls (20, 21) is made to conform to the new diameter by means of adjustment apparatus (30).
摘要:
A roller for a belt stretching mechanism of a spinning machine has edge regions, a central zone which is depressed relative to the edge regions, and a radially movable sleeve located in a region of the central zone.
摘要:
For the piecing of a yarn in an spinning device, various computation formulas are stored in a control device into which calculated values as well as special data converted into numerical values relating in particular to the fiber material, the yarn and the spinning element are first entered to compute and select settings for operations relevant to the piecing process. A feeding device feeding a fiber sliver to the spinning device is first brought to a high pre-feeding speed by means of such pre-programmed values and converted data. From this pre-feeding speed, the feeding speed is greatly decelerated in steps to its piecing feeding speed in coordination with the release of the yarn to be fed back into the spinning element.