Classifications

• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01H—SPINNING OR TWISTING
  • D01H13/00—Other common constructional features, details or accessories
  • D01H13/14—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements
  • D01H13/16—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to reduction in material tension, failure of supply, or breakage, of material
  • D01H13/1616—Warning or safety devices, e.g. automatic fault detectors, stop motions ; Monitoring the entanglement of slivers in drafting arrangements responsive to reduction in material tension, failure of supply, or breakage, of material characterised by the detector
  • D01H13/1658—Associated actuators with mutual actuation, e.g. for two or more running yarns

Definitions

• the invention relates to a method according to the preamble of claim 1 and a spinning twister for carrying out this method.
• the twist of the yarn can be produced by conventional means, preferably by means of a spindle which coaxially penetrates a spinning ring on which a runner dragged by the yarn can rotate.
• a spindle which coaxially penetrates a spinning ring on which a runner dragged by the yarn can rotate.
• other devices for generating the twist and for winding the yarn for example a rotating spinning cup, a wing spindle or the like.
• Each work station of the spinning twisting machine at which a yarn is produced is referred to below as the spinning twisting station.
• each spinning twisting point is assigned a thread break monitor for generating the subsequent break, which has a thread guide for the yarn, which is movably supported on a holder between two positions and which is balanced in a first position held and .. can be moved out of its equilibrium position to a limited extent under the influence of the yarn passing through it, but if these movement limits are exceeded, which occurs due to the breakage of one of the two fiber tapes, to quickly produce the subsequent breakage of the remaining fiber tape into the second position pivots.
• This thread break monitor requires considerable construction effort and, since it is moved relatively rarely to its second position due to the normally relatively small number of sliver breaks, there is also the risk that it becomes stiff due to the accumulation of fiber fly and dust and then can no longer or no longer perform its function safely.
• the generation of the subsequent breakage of the remaining fiber assembly is desirable because the yarn run at the spinning twist point is generally not interrupted by the breakage of only one of the two fiber tapes, but a yarn is then produced with less, half the strength of the same subcomponents. This defect point easily leads to yarn breaks and defective goods during the subsequent processing of the yarn.
• This object is achieved according to the invention in that the lateral displacement of the remaining fiber structure, which continues to run from the drafting device to the spindle or the like, caused by the breakage of one of the two fiber bands, causes the remaining fiber structure to enter a gap which constrains it, which consequently causes the subsequent break of the other fiber band brings about.
• This method is extremely reliable because the gap can be arranged immovably on the machine or, if it is also changed due to the changing of the fiber slivers, at one of the spinning threads on the relevant one
• Machine longitudinal side extending traversing rail can be fixed. So there are no bearings required for the gap, which can become stiff due to fiber fly and dust. Even if there is considerable fiber fly at the gap, this does not affect the safe operation of the gap.
• the gap can also be cleaned by conventional pneumatic traveling cleaners when cleaning the machines.
• the component having the gap can also be produced and attached easily and extremely cheaply without close tolerances and is not subject to wear during operation.
• the gap can expediently be designed in such a way that the remaining fiber structure that has come into it after the breakage of one of the two fiber slivers is clamped in it, that is, it no longer runs in the direction of the spindle or the like. Then the breakage of the remaining fiber assembly referred to as the subsequent break usually occurs between the drafting system and the gap, since this area of the fiber assembly is no longer rotated and pulled off.
• the remaining fiber structure is not clamped in the gap, but at least in many cases it is particularly advantageous to design the gap in such a way that it does not clamp the remaining thread entering it. but only constrains it so weakly that this remaining fiber structure continues to run through the gap, but thereby, by squeezing it into the gap, it inhibits the propagation of the rotation of the fiber structure in the direction of the drafting system.
• a spinning twister can be provided according to the invention.
• this spinning twister By tapering the gap according to claim 5, fiber assemblies of significantly different diameters are securely clamped. In some cases, however, a gap of constant gap width can also be provided, since the fiber associations are considerable. Let the dimensions squeeze together.
• the clear gap surface determined by the preferably straight or in some cases also curved longitudinal sides of the gap can be arranged perpendicularly to the running direction of the yarn or also at an angle to it and can be flat or often also curved.
• the position of the merging point fluctuates constantly slightly to the left and right and up and down during spinning, but the path of the remaining fiber structure that is still present after the breakage of one of the two slivers is clearly removed from this fluctuation range of the merging point.
• you want to prevent the sliver or the yarn from these fluctuations of the unification point in rare cases can get into the column until it is squeezed, it can advantageously be provided that the lateral changes in position of the unification point that occur during operation are limited by the two columns widening in the direction of them Start the thread guide slot.
• this yarn guide slot somewhat below the normally lowest position of the union point. This location is also particularly advantageous for the two columns.
• FIG. 1 is a partial front view of a spinning position of a spinning twister, which has a plurality of such spinning twists in a row next to each other on one or both longitudinal sides,
• FIG. 2 is a greatly enlarged plan view of the gap plate forming the gaps at the spinning twist point according to FIG. 1, 3 is a side view of the plate of FIG. 2,
• FIG. 4 shows a plan view of a wire bracket, likewise forming two gaps, according to a second exemplary embodiment of the invention, which can take the place of the gap plate according to FIGS. 1-3;
• FIG. 5 is a side view of the bracket of FIG. 4th
• Fig. 1 denotes the pair of delivery rollers of a drafting unit of a ring spinning machine, which is not shown in further detail and has one or more draft fields.
• the drafting unit warps two parallel fiber slivers 11, 1 (sliver, roving yarns) at the spinning twist point 9 shown, which after the warping still run untwisted from the pair of longitudinal rollers 10 as fiber slivers 11 ', 12'.
• the main drafting zone of the drafting arrangement can be assigned customary aprons leading the slivers 11, 12 between them.
• the yarn 14 runs to a yarn guide 19 arranged above the spindle 15, at which the so-called thread balloon begins, which corresponds to the area of the yarn 14 rotating around the spindle 15 and extending from the yarn guide 19 to the rotor 17.
• the yarn 14 that is produced is wound into a winding 20 on a sleeve plugged onto the spindle 15.
• a splitting plate 26 which is fastened to a horizontal rail 21 and is symmetrical with respect to its vertical longitudinal center plane 24 (FIG. 2), delimits it the horizontal lateral movements of this union point 13 by means of a funnel-shaped widening slot 25 extending from its narrowest point backwards to two gaps 22, 23 and forwards, as shown in FIG. 2, the two angularly on both sides of the yarn guiding slot 25 subsequent gaps 22, 23 tapering at an acute angle serve to generate subsequent breaks in the wake of each break of any of the two slivers 11 ', 12'.
• the longitudinal center axes of these gaps 22, 23 form an angle of approximately 130 ° and these gaps 22, 23 are arranged in such a way that, in the wake of the breakage of one of the two fiber slivers 11 'or 12', that of the pair of delivery rollers 10 continues
• the remaining fiber bundle 14 'supplied to the yarn guide 19 runs into the gap 23 or 22 furthest away from the broken fiber sliver due to its strong lateral deflection caused by the breakage of the one fiber sliver 11' or 12 'and here and here is clamped or only squeezed in such a way that it can still run through the gap 23 or 22, but in any case the gap 23 or 22 is the propagation of the rotation introduced into the remaining fiber structure 14 'by the spindle 15 inhibits upwards beyond the gap 23 or 22 into the area of the fiber structure 14 'leading from the pair of delivery rollers 10 to the gap 23 or 22, preferably completely prevented.
• this remaining fiber composite 14 ' is thereby obtained necessary into the gap 22 or 23 from the guide slot 25, optionally guided through the relevant edge of this guide slot into the relevant gap 23 or 22 and is squeezed here.
• FIGS. 1 and 2 in the event that the fiber sliver 11 'breaks first, the position of the remaining fiber structure 14' which then arises is shown in dash-dot lines. In this case, the remaining fiber structure 14 'is clamped in the gap 23. If the sliver 12 'breaks first, the remaining fiber structure is forced into the gap 22.
• the remaining fiber structure 14 'thus consists of the fiber sliver 11' or 12 'and the yarn adjoining it immediately before it breaks due to the relevant gap 22 or 23.
• the split plate 26 is produced from a flat piece of sheet metal by first punching it into the shape defined by the fully drawn-out edge and the edge shown in dashed lines in a not yet bent state, and then by the dashed peripheral edge region 29 defined region along the bending line 30 by 180 ° this was bent snugly on the remaining area 'so that more nun ⁇ each of the two gaps 22, 23 by two acute angle intersecting straight Blechkantenbe ⁇ rich 31 is formed 32nd
• the funnel-shaped widening of the guide slot 25 towards the clamping gaps 22, 23 serves to guide the remaining fiber structure 14 'into the relevant clamping gap 22 or 23, and the expansion of the guide slot 25 to the outside serves to make it easier to insert the yarn during the removal of yarn breaks.
• the guide slot 25 and the gaps 22, 23 which adjoin laterally at its rear funnel-shaped extension are formed by a wire bracket 26 'made from a single round metal wire by bending, the shape of which is shown in FIGS. 4 and 5 is clearly recognizable in all details.
• the guide slot 25 and the gaps 22, 23 have a shape and arrangement similar to that of the plate 26 according to FIGS. 1 to 3.
• the wire bracket 26 ' is also bent centrally on its rear side in such a way that a longitudinal slot 40 is formed and can thereby be made if necessary, it is moved in the longitudinal direction of this longitudinal slot 40 after loosening the fastening screw 41 on the frame rail 21 and fastened again in the new position by tightening the screw 41.
• the two outer ends of the wire bracket 26 ′ rest against stops 42 fixedly arranged on the rail 21. Since the wire bracket 26 'can be resiliently bent, one can adjust the width of the guide slot 25 somewhat by these stops 42 in connection with the longitudinal slot 40.
• the rail 21 can be fixed to the frame of the machine, or if the slivers 11, 12 are changed, it can also be provided that this rail 2 * 1 is also changed. Since in the wake of the break of a fiber sliver 11 'or 12' the resulting lateral displacement of the remaining fiber structure is greatest in the vicinity of the previously existing union point 13, it is expedient to prefer the gaps 22, 23 in the vicinity of the union point 13 to be arranged somewhat below the lowest position of this union point 13 which normally occurs during operation, as shown in FIG. 1 using an example. However, it is conceivable that in some cases the two gaps can be arranged laterally next to the two fiber bands 11 ', 12' somewhat above the point of union 13.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Textile Engineering (AREA)
• Spinning Or Twisting Of Yarns (AREA)
• Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (1)

Family

ID=6102764

Family Applications (1)

Country Status (6)

Families Citing this family (1)

Citations (5)

Family Cites Families (1)

• 1980
  • 1980-05-19 DE DE19803019056 patent/DE3019056A1/de not_active Ceased
• 1981
  • 1981-05-18 WO PCT/EP1981/000048 patent/WO1981003350A1/de unknown
  • 1981-05-18 JP JP56501688A patent/JPS57500883A/ja active Pending
  • 1981-05-18 BR BR8108615A patent/BR8108615A/pt unknown
  • 1981-05-19 IT IT21826/81A patent/IT1138360B/it active
  • 1981-05-19 FR FR8109980A patent/FR2485045A1/fr active Granted

Patent Citations (5)

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