CZ20041160A3 - Apparatus for loop spinning or twisting - Google Patents

Abstract

Loop-spinning or twisting apparatus comprising a substantially vertical spindle (2) with a winding sleeve (3) provided with a first drive for rotation and a second drive train (9) for programmed axial movement of the spindle (2) and coaxial with the spindle (2) arranged tubular a balloon restrictor (5) whose rotatably mounted upper portion (111, 112) provided with the inner guide surface (121, 122) for the yarn (P) and the third drive device (20) for rotating in the same direction as the spindle (2) intervenes s curls into the non-rotating lower portion (141, 142) of the balloon restrictor (5) with the inner guide surface (151, 152) for the yarn (P), over which the lower edge (161, 162) extends to the rotating open loops (31). The lower portion (141, 142) of the balloon restrictor (5) is associated with a fourth drive train (25) for its programmed, bidirectional vertical movement, which is coupled to the second drive train (9) by a control device (29) for program control of the gap (30). between the lower edge (131, 132) of the upper portion (111, 112) and the lower edge (161, 162) of the lower portion (141, 142) of the balloon restraint (5) during operation.

Description

Loop spinning or twisting devices

Technical field

The invention relates to a loop spinning or twisting device according to the preamble of claim 1.

BACKGROUND OF THE INVENTION

The principle of loop spinning or twisting is explained in EP 0 883 0 703. The preamble of claim 1 is based on the previously unpublished patent application CZ 2003-588 of the same applicant.

The loop spinning or twisting apparatus comprises a substantially vertical spindle with a winding sleeve, provided with a first drive mechanism for rotation and a second drive mechanism for programmatic, bidirectional axial movement of the spindle. A tubular balloon restrictor is provided coaxially with the spindle, the pivotally mounted upper portion having an inner yarn guide surface and a third rotation drive in the same sense as the spindle, extends with play into the non-rotatable lower portion of the balloon restrictor with the inner yarn guide surface. during operation expands over its lower edge into a rotating open loop.

The inner guide surface of the lower part of the balloon restrictor, which in fact forms the continuation and termination of the inner guide surface of the upper part of the balloon restrictor, serves as a braking surface for effectively reducing the speed of the rotating open loop.

In practice, it has been found that the axial distance between the lower edge of the top (141V0405]

part of the balloon limiter and the lower edge of the bottom part of the balloon limiter, respectively. the length of its inner yarn guide surface in contact with the yarn affects the diameter of the rotating open loop such that the larger the contact, the smaller the rotating open loop. This peripheral diameter of the rotating open loop also sensitively responds to the diameter of the yarn winding tube and its size increases with increasing diameter. The rotating open loop is then even larger for yarns of greater length weight.

The diameter of the radially unlimited rotating open loops defines the spindle pitch of the machine. The spindle pitch of the machine must therefore be selected to be suitable for yarns of different length weights, which is disadvantageous when spinning with rotating open loops that are formed in one horizontal plane. The formation of rotating open loops of different size when the yarn is wound to the changing diameter of the yarn winding on the tube also has a certain negative effect on the structure of the winding structure.

SUMMARY OF THE INVENTION

It is an object of the present invention to at least largely eliminate the above disadvantages.

This object is essentially solved by the device according to the invention in that the lower part of the balloon limiter is associated with a fourth driveline for its programmatic, bidirectional vertical movement which, together with the second driveline, is connected to the control device for programmatically controlling the gap between the lower edge the lower edge of the lower part

and the size of the peripheral diameter of the rotating open loop during the winding of the yarn to the core.

The control system program ensures that the length of contact of the yarn with the inner guiding surface of the lower part of the balloon limiter varies according to the diameter of the yarn winding being wound.

The winding to the core is performed by the interaction of unidirectional or bidirectional, programmatic axial spindle movement and bidirectional vertical movement of the bottom of the balloon restrictor. According to a first variant, the yarn winding on the tube is the result of bidirectional, programmatic axial movement of the spindle and the bottom of the balloon restrictor. The tapered end of the lower end of the top of the balloon limiter extends with play into the cylindrical inner guide surface of the bottom of the balloon limiter. The control of the peripheral diameter of the rotating open loop allows its size to be within a certain dimensional interval advantageous in terms of minimizing the spindle pitch of the machine. The rotating open loop formed will not be small with the risk of disappearing inside the balloon restrictor during the piecing process, but not so large as to hit adjacent rotating open loops.

According to a second variant, the upper part of the balloon restrictor with a cylindrical inner guide surface extends with a play into its lower part, which is continuously widened, preferably conical, towards its lower edge. In this case, a conical winding is formed on the tube at the maximum stroke of the lower part of the balloon restrictor and the one-sided movement of the spindle by the thickness of the wound yarn per one amplitude of the guide stroke. The advantage of the second variant is the rational production of the cylindrical top part of the balloon restrictor, the reduction of the speed and lift height of the spindle bench, which has a positive effect on the power input of its drive. However, its use is more suitable for producing yarns of higher length weight.

The drive means are, for example, formed by conventional servomotors connected to the actuating mechanism, respectively. computer for their program control during the spinning process. The programs are processed according to the results of the test spinning of yarns of different fiber materials and length weights at different operating speeds of the functional bodies of the machine workstation. The development of appropriate programs is readily apparent to those skilled in the art.

E.g. In case of synchronous counter-directional axial movement of the spindle and the bottom part of the balloon limiter, the spindle drive servomotor is selected as the reference servomotor, where the amplitude and stroke speed are programmed and the position and velocity information is recalculated through the control gear with a focus on tracking the size of a rotating open loop) (set to move within the desired dimensional interval). The required position and speed data are then transmitted to the servomotor driving the bottom of the balloon restrictor in the axial direction.

The rationalization of the peripheral diameter of the rotating open loop makes it possible, on the one hand, to minimize the spacing of the machine spindles and, on the other hand, it has a positive effect on the uniformity of the spun yarn and improves the structure of the wound wrap.

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BRIEF DESCRIPTION OF THE DRAWINGS

Further features and advantages of the invention will become apparent from the following description of exemplary embodiments, which are schematically illustrated in the accompanying drawings, in which:

Fig. 1 is a side view of a partially illustrated work station of the loop spinning or twisting machine, in partial axial section; Fig. 2 is an enlarged detail of Fig. 1 with a first variant of the balloon limiter arrangement; limiters.

DETAILED DESCRIPTION OF THE INVENTION

Fig. 1 shows an exemplary embodiment of one of a number of workstations of a loop spinning or twisting machine. This workstation comprises a draw-through device for the fiber strand, respectively. the yarn or the feed device for the multiple thread system, depending on whether it is a loop spinning machine or a loop twisting machine. However, from the point of view of the invention, it is a feed device for the feeder material indicated by a pair of feed rollers L A spindle 2 carrying a yarn sleeve 3 and a spherical balloon limiter 5 of the rotating yarn balloon 6 associated with the spindle 2. 2, rotatably mounted on the spindle bench 7, which is laid over all the work stations of the machine, is rotatably driven by a first drive device (not shown) consisting of an individual motor or a tangential belt drive mounted in

spindle bench 7.

The spindle bench 7 is connected by transmission 8 to a second drive device 9 for programmed controlled movement in the direction of the double arrow 10.

The balloon restrictor 5 (FIGS. 1a and 2) consists of a pivotally mounted upper portion 111 with a cylindrical inner guide surface 121 for yarn P, which is tapered towards the lower guide edge 131, and a coaxial, non-rotatable, annular bottom portion 141 with a cylindrical inner guide a surface 151 into which the end of the top portion 111 of the balloon restrictor 5 engages with play. The lower portion 141 terminates in a rounded lower edge 161. On top of the balloon restrictor 111 (FIG. 1) is axially connected a shaft 17 which is rotatably supported by a bearing 18 in a housing 19 of a third engine 20, arranged as a rotor of this engine. The housing 19 is placed on a support bench 21 which, like the spindle bench 7, is placed over all work stations of the machine, but is stationary relative to the spindle bench 7. The shaft 17 has a through axial bore 22 through which the yarn P is fed to the top 111 of the balloon restrictor 5. The bottom 141 of the balloon restrictor 5 is located on a support bench 23, which is laid across all work stations of the machine and coupled 24 to the third drive train. 25 for its programmatic vertical movement in the direction of the double arrow 26. The second drive 9 and the third drive 25 are connected via lines 27, 28 to a control 29, which in operation programmatically controls the synchronous operation of the two drives with the respective stroke amplitudes the size of the gap 30 between the lower edges 131,161 of the balloon restrictor 5.

The device according to FIGS. 1 and 2 operates as follows: The yarn P emerging from the feed rollers 1 during operation enters the axial opening 22

9

9 9

shaft 17 into the cavity of the upper portion 111 of the balloon restrictor 5 whose rotation speed is greater than the speed of rotation of the spindle 2. In the cavity of the upper portion 111, the yarn P forms a balloon 6 so that it reaches its inner guide surface 121. it moves in the direction of the lower edge 131 of the upper portion 111, through which it passes to the inner guide surface 151 of the lower portion 141 of the balloon restrictor 5 and passes through its lower prism into a rotating open loop 31.

The inner guide surface 151 of the lower part 141 acts as a brake on the rotating open loop 31, so that it is braked in its rotation about the axis of the spindle 2, to the extent that its rotation speed is preferably still lower than the speed of the spindle 2. The circumferential diameter depends on the size of the gap 30.

In operation, the control device 29 programmatically controls the required amount of gap 30 between the lower edges 131, 161 of the balloon restrictor 5 through the second drive device 9 and the third drive device 25.

According to a second variant in Fig. 3, the principle of the spinning or twisting process is identical to that described in Figs. 1 and 2. The upper part 112 of the balloon restrictor 5 is formed by a tube 32 with a cylindrical inner guide surface 122 terminating with a lower edge 132. an annular lower portion 142 with a conical inner guide surface 152 terminated with a rounded lower edge 162. At the upper end, the tube 32 is treated, supported and driven as in the first variant (FIG. 1). Also, the drive mechanism of the spindle bench 7 and the support bench 23, including their control, are identical to the first variant.

Claims (3)

PATENT CLAIMS A loop spinning or twisting apparatus comprising 5 substantially vertical spindles (2) with a winding sleeve (3), provided with a first rotation drive and a second drive (9) for programmatically axially moving the spindle (2) and coaxially with the spindle (2) an arranged tubular balloon limiter (5) having a rotatably mounted upper portion (111, 112) provided with an inner guide surface (121, 122) for the yarn (P) and a third rotation device (20) in the same sense as the spindle (2) extends with a clearance into the non-rotatable lower part (141, 142) of the balloon restrictor (5) with an inner guide surface (151, 152) for the yarn (P), over whose lower edge (161, 162) the yarn (P) ) expands into a rotating open loop (31) during operation, 15, characterized in that the lower part (141, 142) of the balloon restrictor (5) is associated with a fourth drive device (25) for its programmed, bidirectional vertical movement, which is coupled to the control device (29) together with the second drive device (9). for program control the size of the gap (30) between the lower edge 20 (131, 132) of the upper portion (111, 112) and the lower edge (161, 162) of the lower portion (141, 142) of the balloon restrictor (5) during operation. Device according to claim 1, characterized in that the lower part (142) of the balloon limiter (5), the inner guide 25, the surface (152) extends continuously towards its lower edge (162), engaging the top (112) of the balloon restrictor (5) with a cylindrical The internal guide surface (122) is provided. Device according to claim 2, characterized in that the inner guide surface (152) of the lower part (142) of the balloon restrictor (5) is conical.