EP0296546B1 - Aus Stapelfaser-Vorlage Fäden produzierende Spinnmaschine - Google Patents

Aus Stapelfaser-Vorlage Fäden produzierende Spinnmaschine Download PDF

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Publication number
EP0296546B1
EP0296546B1 EP88109892A EP88109892A EP0296546B1 EP 0296546 B1 EP0296546 B1 EP 0296546B1 EP 88109892 A EP88109892 A EP 88109892A EP 88109892 A EP88109892 A EP 88109892A EP 0296546 B1 EP0296546 B1 EP 0296546B1
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EP
European Patent Office
Prior art keywords
slubbing
feed
production
reserve
zone
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP88109892A
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German (de)
English (en)
French (fr)
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EP0296546A1 (de
Inventor
Peter Oehy
Emil Briner
Isidor Fritschi
Othmar Bachmann
Daniel Brennwalder
Herbert Stalder
Anton Wuest
Andrew Barritt
Markus Dinkelacker
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Maschinenfabrik Rieter AG
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Maschinenfabrik Rieter AG
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Publication of EP0296546A1 publication Critical patent/EP0296546A1/de
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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
    • D01H13/04—Guides for slivers, rovings, or yarns; Smoothing dies
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H15/00—Piecing arrangements ; Automatic end-finding, e.g. by suction and reverse package rotation; Devices for temporarily storing yarn during piecing
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H9/00—Arrangements for replacing or removing bobbins, cores, receptacles, or completed packages at paying-out or take-up stations ; Combination of spinning-winding machine
    • D01H9/005—Arrangements for replacing or removing bobbins, cores, receptacles, or completed packages at paying-out or take-up stations ; Combination of spinning-winding machine for removing empty packages or cans and replacing by completed (full) packages or cans at paying-out stations; also combined with piecing of the roving
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H9/00—Arrangements for replacing or removing bobbins, cores, receptacles, or completed packages at paying-out or take-up stations ; Combination of spinning-winding machine
    • D01H9/005—Arrangements for replacing or removing bobbins, cores, receptacles, or completed packages at paying-out or take-up stations ; Combination of spinning-winding machine for removing empty packages or cans and replacing by completed (full) packages or cans at paying-out stations; also combined with piecing of the roving
    • D01H9/008—Arrangements for replacing or removing bobbins, cores, receptacles, or completed packages at paying-out or take-up stations ; Combination of spinning-winding machine for removing empty packages or cans and replacing by completed (full) packages or cans at paying-out stations; also combined with piecing of the roving for cans

Definitions

  • the present invention relates to a spinning machine according to the preamble of claim 1.
  • the invention also relates to a method and device for attaching a reserve sliver to a production sliver according to the preamble of claims 7, 10 and 17, 21.
  • the spinning machines of this type known today have the disadvantage that when the original, which can be fiber sliver to be removed from a can or fiber sliver supplied from a reel, is used up, the insertion of a new package, ie a full can or a full reel, and the insertion of the ribbon or fuse in the spinning position, time consuming is.
  • the resulting standstill of the spinning station or the entire spinning machine entails considerable costs.
  • the downtimes could be eliminated to a certain extent by the provision of operating personnel who would be ready at any time to change immediately when a pack that has become empty is displayed. However, this would also result in high costs.
  • the aim of the present invention is to remedy this situation, at least partially, inexpensively and by starting when changing the bobbin structurally simple and reliable way to automate, so that less operating personnel is necessary and unproductive spinning positions and work tips can be avoided.
  • This aim is achieved by the characterizing features of claims 1, 7 and 10, 17 and 21.
  • the invention enables an automatic introduction of a reserve or readiness template into the spinning process when the template on the spinning machine has been used up without any noticeable loss of time, so that the spinning machine without noticeable loss of time, i.e. can continue to work immediately after the designated machine or switch has inserted the reserve template.
  • This loss of time corresponds in terms of magnitude to the time required for the automatic removal of a thread break in the known spinning machines.
  • For the subsequent, manual or mechanical replacement of the empty pack there is a period of time, that is to say a great deal of time, until the reserve or pack introduced into production becomes empty.
  • This is particularly valuable in automatic machines because it means that only a small number of operating personnel is required. This way of working allows e.g. the implementation of long, low-operator night shifts, in which the operating personnel only have to perform monitoring functions, i.e. does not perceive any direct interventions in the work process.
  • the operating personnel has no further tasks to do in relation to the setting of the reserve fuse.
  • a reliable way is given by turning the match ends to be connected or by simultaneously pressing the reserve match to the production match and the division, ie. Clamping or cutting the production fuse at another section.
  • the device consists of only a few parts, which has a cost-effective effect.
  • mechanical sliver rotating means would be conceivable, according to claim 8 only air is required.
  • the production fuse is monitored automatically instead of by the operating personnel. Through the proposal according to claim 12, the consumable air can escape faster.
  • the end of the reserve fuse can be held and, on the other hand, the separated fuse element can be removed directly without causing any damage.
  • the second section of the reserve fuse can be brought into the path of the production fuse, simply by using the drafting system.
  • the functional reliability of the method or the device can be increased considerably.
  • An additional increase in functional reliability is achieved with the feature according to claim 24.
  • the feature according to claim 26 means that the production fuse and the reserve fuse in the standby position cannot hinder each other.
  • the feature according to claim 27 allows the number of device parts to be reduced.
  • the invention is mainly for spinning on the The basis of the ring spinning machines, the rotor and friction processes and the air jet spinning are an advantage.
  • German Offenlegungsschrift 25 13 692 and Swiss Patent 562 337 relate to open-end spinning devices in which two or more fiber slivers are simultaneously fed to an opening roller consisting of several hoppers (compressors) for the purpose of mixing the fibers of the majority of the slivers with one another.
  • These publications also have no ideas common to the present invention.
  • the Swiss patent 383 228 relates to strip processing spinning machines, such as draw frames and the like.
  • a sliver drawn from a can is passed between a fixed roller and a spring-loaded roller.
  • these rollers close an electrical circuit and a reserve tape lying on a rod is drawn into an electrical winding so that the reserve tape falls between the conical tips of the feed rollers.
  • a sliver 11 forming a template is passed through a channel 12 of a feed member 13.
  • the exit point of the channel 12 is in the immediate vicinity of a feed roller 14, i.e. directly in front of the converging space in front of the feed roller 14. Together with a clamping desk 15, this serves to transport the fiber sliver 11 to a dissolving roller 16 forming a draft element.
  • a fiber guide channel 17 serves to pass on the fibers, which have been broken up by means of the roller 16, to a rotation-imparting member or spinning rotor, not shown.
  • the feed element 13 and the terminal 15 form a fixed unit.
  • a second feed element 19 with a second channel 18 and a second terminal 20.
  • channel 18 is a further template, not drawn sliver held.
  • the units 19, 20 are held together with the units 13, 15 by an annular body 21 and carried by a shaft 23 which can be pivoted about the axis 22. 1 and 2, the feed member 13 is in the operating position and the feed member 19 in the standby position. The explanation of this designation follows in the further course of the description.
  • the units 13, 15 and 19, 20 are fixed to the shaft 23. Their pivoting movements are generated by correspondingly driving the shaft 23. The pivots take place by 180, each of the feed organs 13, 19 alternately in the Basic, Ready position reached.
  • the sliver 11 is taken from a sliver-containing production package or production jug, not shown, and pulled through the feed member 13 located in the operating position.
  • a monitoring device 24 serves to determine the presence of the same and, if appropriate, to generate a signal in the absence thereof.
  • the units 13, 15 and 19, 20 can also be displaced in the direction parallel to the axis 22, to the left according to FIG. 1, by means of measures not shown and can thus be retracted into the position indicated by dash-dotted lines and can be pushed back into the starting position drawn with solid lines.
  • Fig. 3 is a step along the line III ... III
  • two feed elements 13, 19 with the channels 12 and 18 are provided. They are made from a single piece and can be moved parallel to the side surfaces of a clamping console 25.
  • the feed member 13 is in the operating position and the feed member 19 is in the standby position.
  • the sliver located in a production pack is fed to the feed member 13 and the sliver in a standby pack is fed to the feed member 19.
  • the feed organs 13 and 19 are arranged directly and with minimal space on one side surface of the terminal desk 25.
  • the latter has two inlet zones 26, which are advantageously curved downwards towards their free ends in order to ensure that fiber sliver ends hanging out on the outlet side of the channels 12, 18 are guided.
  • a feed roller 14 which, together with the desk 25, is used to move one of the ones guided through the channel 12 in FIG. 4 sliver 11, not shown, is used for an opening roller 16.
  • the clamping desk 25 is biased against the feed roller 14 by means of an elastic member, for example a spring 27.
  • an elastic member for example a spring 27.
  • the sliver is broken up into fibers by the opening roller 16 during operation, which fibers are transported into a spinning rotor, not shown.
  • the feed organs 13, 19 are moved in such a way that the feed organ 19 reaches the operating position and the feed organ 13 reaches the position 35 shown in broken lines, which is a standby position for the organ 13.
  • the fiber sliver held by the channel 18 and supplied by the standby or second can is thus detected, possibly with the aid of a conveyor device (not shown) within the feed element, and the spinning process continues after a brief interruption.
  • the original production package, which is now empty, must be replaced by a new one, and the sliver present in this new package must be introduced into the channel 12 and held in it. A very long period of time is available to carry out these latter two steps.
  • the organs 13, 19 are in turn returned to their drawn, original position. After the second blank Kanne is replaced by a full, the beginning of the sliver to be removed from the latter must be inserted into and held in the channel 18.
  • FIGS. 1 and 2 with the retraction and forward movement of the units 12, 13, 15 and 18, 19 20 has the advantages that between the feed organs 13 and 19 and there is no gap or space in the clamping consoles 15 or 20 in which fibers could get caught.
  • the guidance to the nip point of the feed roller 14 and the nip 15 mediated by the channels 12 and 18 is shorter than in the embodiment with the separated, non-pivotable desk 15.
  • FIGS. 3, 4 and the embodiment according to FIGS. 1, 2, which is marked with the omission of the bracket 20 and has a non-pivoting bracket 15, has the advantages that a constant, mutual adjustment of the desk 15 and 25 is always the same Roller 14 is present.
  • the conditions for the tape feed to the opening roller thus always remain constant. They are independent of which of the feed organs 13, 18 is in the operating position. This ensures a constant thread quality.
  • the retraction movement shown in broken lines in FIG. 1 is not necessary. This means a reduction in the time required for changing the belt and a simpler construction of the spinning unit. Depending on the circumstances, one or the other embodiment will be preferred.
  • FIGS. 5, 6 in turn has two feed organs 13, 19 provided with channels 12 and 18, respectively.
  • the organ 13 is in an operating position and the organ 19 in a standby position. From each of a production and standby pack, again not shown, is removed and inserted into the channels 12 and 18, respectively for the sake of clarity, only the bank 11 carried through the channel 12 is drawn in FIG. 5.
  • the feed element 13 located in the operating position is in turn assembled with a clamping desk 15.
  • the feed member 19 also forms a fixed unit with a terminal desk not visible in FIG. 5.
  • the clamping desk 15, which is in the operating position, works together with a feed roller 14 in order to feed fiber sliver to an opening roller 16, not shown in FIG. 6, during operation.
  • the feed organs 13, 19 are located on a swivel body 30.
  • This body 30 is pivotable about a shaft 31 in a position shown in dash-dotted lines in FIG. 6 'for the purpose of bringing the feed organs 13, 19 optionally into their operating and ready positions.
  • the body 30 can also be tilted together with the shaft 31 about the axis of a further shaft 32 into the position 30 ⁇ shown in broken lines in FIG.
  • the execution of swiveling movements around the axis 31 can be carried out, for example, by means of a threaded spindle, i.e. a rotatable worm 33 and a worm wheel 34 driven thereby.
  • the body 30 is then tilted back into its original position about the axis of the shaft 32, as a result of which a clamping desk belonging to the feed element 19 interacts with the feed roller 14. During this movement, the feed member 13 is moved into its standby position, shown in broken lines in FIG. 6. A new sliver is thus attached to the feed roller 14.
  • a feed member 36 is provided for a template which is only shown in FIG. 7 and is formed by a fuse 37.
  • the organ 36 is in its operating position.
  • a second feed organ 38 is in its standby position.
  • the feed organs 36, 38 are held by a carrier plate 39. Both have a channel 40 through which a template is drawn.
  • drive rollers 41, 42, 43 and pressure rollers 44, 45, 46 biased against one of the same are provided.
  • the rollers 41 and 44 are rotatable about the axes 51 and 52 shown in FIG. 8.
  • the rollers 42 and 45 serve to drive the aprons 47 of a double apron drafting system.
  • the drafting zone or drafting element shown is the pre-drafting zone between the rollers 41, 44 and 42, 45 and the main drafting zone between the rollers 42, 45 and 43, 46.
  • the rotation of a spindle 48 operating as a rotation-imparting element causes the fiber material emerging from the rollers 43, 46 to twist, that is to say the formation of a thread, and a rotation of a runner 49 around the spindle 48 and thus, with the formation of a balloon 50, the winding of the thread onto it Spindle 48.
  • the carrier plate 39 together with the feed elements 36, 38 can be displaced parallel to the axes 51, 52, with either the feed element 36 or the feed element 38 coming to rest in the operating position via the pressure roller 44.
  • a spinning unit is assigned two sliver coils, the fuse of the first coil (feed coil) being inserted into the feed element 36 in the operating position and the fuse of the second coil (standby coil) into the feed element 38 which is in the standby position.
  • the feed coil has been used up, analogously to the example of FIGS. 3 and 4, after a corresponding control by a signal from a monitoring organ, the feed organ 36 is moved into the standby position shown in phantom in FIG. 8 and at the same time the feed organ 38 is moved into the operating position, so that spinning will resume fully automatically.
  • FIG. 9 shows a spool 54 assigned to a first of two adjacent spinning units and a spool 55 assigned to the second of these adjacent spinning units.
  • a standby or reserve spool 56 is provided.
  • the fuse of the coil 54 is guided to a feed element 57 and the fuse of the standby coil 56 to a feed element 58.
  • the organ 57 is in the operating position and the organ 58 in its standby position.
  • the standby position for the organ 57 is designated 59.
  • the second spinning unit comprises feed organs 60, 61, of which the organ 60 is in its operating position and the organ 61 is in its standby position located.
  • the standby position of the organ 60 is denoted by 62.
  • the fuse of the coil 55 is attached to the organ 60. In the working phase according to FIG. 9a, no fuse is attached to the organ 61.
  • the spool 54 is half used up at the start of the spinning process. This is indicated by the indication "1/2".
  • the coil 55 is, as indicated by the indication "2/2", fully wound with a fuse.
  • the standby template in the standby position is fully wound and serves as a reserve spool 56, which is expressed by "R”.
  • the spool 54 When these spools have used up the amount of sliver corresponding to half of a full spool, the spool 54 is empty and must be replaced by a full spool, which now functions as a standby pack or reserve spool 63. In addition, the fuse of the newly installed reserve spool 63 must be attached to the feed organ 61. After this has been carried out, the relationships shown in FIG. 9b are present.
  • the bobbin 55 is used up, whereupon the second spinning unit comprising the feed elements 60, 61 is switched off and the double feed element 60, 61 is actuated.
  • the organ 61 thus arrives in the operating position and the organ 60 in the standby position 62.
  • the now empty spool 55 must be replaced by a full spool 64, which now forms a ready-to-use pack, and its fuse to the feed organ 57 can be applied.
  • the resulting state is shown in Fig. 9c.
  • the attachment device shown in FIG. 10 has a block 102 with a lower part 103 and an upper part 104 which is always closely fitting thereon.
  • Channels 106, 107 are located in the upper part 104 and channels 108, 109 in the lower part 103, all of which open into an intersection area 111 located in the lower part 103 and are thus all connected to one another.
  • a production slab 113 with a Z rotation moving in the direction of the arrow 112 is drawn off by feed rollers 114, 115 of a drafting unit 116 from a production spool 118, the production sliver 113 passing through the production sliver inlet channel 106 and through the production sliver outlet channel 108; this represents the operating position.
  • a reserve fuse 120 likewise with a Z rotation, is guided manually or mechanically through the reserve bottom entry channel 107 and the reserve bottom exit channel 109 until the end of the reserve fuse 120 is just visible. This is the standby position.
  • An air suction nozzle 123 in the channel 109 holds the reserve fuse 120 tight, but is not absolutely necessary since the hanging fuse 120 remains stationary even without the air suction nozzle 123. It is also possible to dispense with a clamping means 124 provided in front of the channel 107.
  • a monitoring means 130 monitors the production spool 118 and, when the stock is at a minimum, ie when the spool 118 is soon to be empty, sends a signal to an inlet valve 131 which first removes air from an air source 132 and an air line 135 in the duct 108 and an air line 136 in the channel 107.
  • the air lines 135, 136 open tangentially into the relevant, opposite channels 108, 107, so that the supplied air gives a first sliver portion 113.1, 120.1 a twisting force.
  • the lines 135, 136 are drawn obliquely to the axes of the channels 107, 108, although they can also run at right angles to them.
  • the time-controlled inlet valve 131 guides air by means of a pressure surge for the purpose of separating the sliver of an air line 137 in the channel 106 and an air line 138 in the channel 106 opposite channel 109 to.
  • a lockable, perforated air outlet opening 141 is provided in the intersection area 111, which is opened at this moment.
  • the running production line 113 is held by the production spool 118 and the drafting system 116.
  • the clamping means 124 also serves to limit the area of rotation in the reserve fuse 120.
  • the match end section 113.1, 113.2 and likewise the match end section 120.1, 120.2 will relax again, whereby they open again according to the arrows 143.
  • the bent second sliver sections 113.2, 120.2 are also stretched in accordance with the arrows 144.
  • the upper part 104 is rotated about an axis 148 which is normal to the lower part 103, so that the reserve sub-entry channel 107 now becomes the production sub-entry duct 106, as a result of which the reserve sub-assembly 120 now comes into the operating position which passes through the channels 106 and 108 is formed (Fig. 14).
  • a block 102 is provided at each spinning station of the ring spinning machine.
  • a housing 202 preferably fastened to the drafting mechanism or to the traversing rod, is arranged immediately in front of a pair of intake rollers 203 of a drafting system and has a continuous elongated hole 204 and an open, on the longitudinal side of the housing, into which The longitudinal slot 205 which opens into the elongated hole 204 and extends over the entire length.
  • the upper, smooth, rounded end 206 from the elongated hole 204 determines or limits the path of the production cable 208 upwards, which production cable 208 is, quite conventionally, from the feed roller pair 203 to a production roving or sliver coil 209 extends.
  • a sliding plate 212 is arranged in the lower region of the elongated hole 204 and can slide at right angles or normal to the upper end 206.
  • Reference number 214 denotes a pressing area of the housing 202 opposite the pair of feed rollers 203, and the straight, upper narrow side 215 of the slide plate 212 and the upper end 206 of the elongated hole 204 in parallel.
  • the reference number 217 denotes a clamping area and in this clamping area 217 a clamping body 219 is laterally attached to the sliding plate 212.
  • a reserve slub 223 is moved manually or by a gripper of an operating device by parallel displacement through the longitudinal slot 205 onto the upper narrow side 215 placed.
  • the gripper can also pull through the reserve fuse 223 from a reserve fuse entry point 224 over the length of the housing in accordance with an axial movement.
  • the insertion position is shown in FIGS. 15A, 16A and 17A.
  • a spacer In the pressing area 214, a spacer, a leaf spring 226, is arranged in a recess 227 and fastened to the housing 202.
  • the leaf spring 226 bridges the width 228 of the elongated hole 204 and, with its flat section, defines or delimits the path of the production sliver downward, thereby simultaneously keeping the production sliver 208 and the reserve sliver 223 at a distance.
  • the reserve fuse 223 also lies in the clamping area 217 on the upper narrow side 215, the reserve fuse 223 lying in a bulge or indentation of the clamp body 219.
  • Another, less suitable version consists of extending the reserve fuse 223 over the length, ie.
  • FIGS. 16B and 17B show the standby position 223 in the ready position, the sliding plate 212 being raised or displaced such that it is in the pressing area 214 bridges the longitudinal slot 205, so that an end section 223.1 of the reserve fuse 223 is held between the upper narrow side 215, the leaf spring 226 over its length and the housing part located above the longitudinal slot 205.
  • a monitoring device 232 for example an optical sensor, detects a minimum amount of roving on the production roving spool 209, the sliding plate 212 is activated, as a result of which it is brought into the coupling position (FIGS. 16C, 17C).
  • the sliding plate 212 will remove the leaf spring 226 from the width 228 of the elongated hole 204 or push it to the other side, and the end section 223.1 of the reserve fuse 223 will be brought into the path of the production fuse 208 and pressed against a first section 208.1 of the production fuse 208, such that that the reserve fuse 223 adheres to the current fuse 200, is carried along by the fuse 208 and is drawn in by the pair of feed rollers 203, a thickening of the bond in the two grooves 208, 223 being accepted.
  • the clamping body 219 is also brought by the sliding plate 212 in the direction of the upper end 206, that a second section 208.2 of the production lead 208 is clamped between the clamping body 219 and the upper end 206 and is thereby stopped.
  • the distance 234 between the pressing area 214 and the clamping area 217 represents the predetermined breaking area and within this distance 234 the production fuse 208 breaks or divides.
  • the reserve fuse is instead taken along by the feed roller pair 203 and becomes the new production fuse.
  • the sliding plate 212 is brought back into its starting position corresponding to the insertion position according to FIGS. 16A, 17A.
  • a second section 223.2 of the reserve match 223, which is adjacent to or adjacent to the end section 223.1 of the reserve match 223, is tightened by means of the tightening caused by the pair of draw-in rollers, the reserve match 22 located between the pair of draw-in rolls 203 and the reserve prewar spool, which has now become the new production match, via a slope 236 drawn in the indentation on the clamping body 219 according to an arrow 237 into the original path of the former production lead 208 and against the upper end 206 of the elongated hole 204 (FIG. 17D). So that the automatic tightening into the production slit entry point 220 can be accomplished, the longitudinal slot 205 is given a larger width 238 over a length overlapping the clamping area 217.
  • FIG. 15B which figure shows the graphical curve of the tensile force A drawn in dash-dot lines on the fuse and the tensile strength B of the fuse (ordinate) over the distance (abscissa) between the clamping point 240 of the feed roller pair 203 and the clamping region 217.
  • the greatest relative tensile strength can be given to the fuse via the distance 241 between the clamping point 240 of the pair of feed rollers 203 and the pressing area 214, by selecting this distance 241 to be smaller than half the average fiber length, preferably as small as possible.
  • the fuse breaks or tears here, most of the individual fibers have to be torn.
  • the tensile strength B of both fuses is increased, but is increasingly reduced due to the greater distance compared to the distance 241. Due to the friction between the fuses 208, 223 and the housing parts, the tensile force A on the fuse decreases linearly.
  • the appropriate coefficients of friction can be determined by simple tests by selecting the material to be used and the surface properties.
  • the predetermined breaking area 234 between the pressing area 214 and the clamping area 217 should have a distance which is greater than the mean fiber length.
  • the individual fibers which are no longer pressed against each other, do not have to be torn, but slide off one another.
  • the tensile strength value B of the fuse 208 is therefore below the tensile force value A on the fuse 208.
  • the fuse 208 should, if possible, be in the distance region or predetermined breaking area 234 without contact with the upper end 206 of the elongated hole 204, i.e. move outdoors so that uncertainties from contact can be avoided.
  • the elongated hole 204 therefore has a larger width 242, at least in the distance region 234. In the embodiment according to FIG. 15A, this enlarged width 242 extends to the production line entry point 220.
  • the housing 202 In order to place the housing 202 as close as possible to the feed roller pair 203, the housing 202 can be arranged tilted upwards such that both rollers of the feed roller pair 203 are approximately the same distance from a beveled surface 244 at the production sliver exit point 221.
  • the advantage of a sliver break as a result of an indirect division in the predetermined breaking area 234 is that a beard is formed on the separate parts of the production sliver 208, so that the connection point has a gradual thickening. Tests have shown that there are no thread breaks between the drafting system and the spindle if the spindle speed is briefly reduced to 12000 rpm.
  • a severing means for example a knife 248, to the upper end of the clamping body 219, which has only been shown in broken lines in FIGS. 15A and 17A.
  • the reference numerals 219 and 248 together are referred to as dividing bodies.
  • the severing ie. a direct division occurs at the same time as it is pressed, but can take place a little earlier. In this case, the distance 234 can be reduced to zero, so that the division area 234, 217 practically shrinks to the area 217.
  • the spindle speed to be reduced to approximately 2000 rpm, which is related to the absence of a beard and, consequently, to the sudden thickening of the joint.
  • a further possibility of dividing the production line 208 directly would be to use a drivable milling cutter as the dividing means instead of a knife 248 with the purpose of producing a beard by rubbing through.
  • a drivable milling cutter as the dividing means instead of a knife 248 with the purpose of producing a beard by rubbing through.
  • Such an attachment device is already somewhat complicated, since a flight suction device may also have to be provided.
  • the production lead 208 can be held or clamped by a clamping body containing a suction air nozzle.
  • the production line 208 run out and determine the end of it locally by means of a monitoring means, for example an optical sensor, at a suitable point upstream of the attachment device.
  • This monitoring means then gives a signal, whereupon the sliding plate 212 moves upwards.
  • the length of the end section of the production line can be precisely determined by the running speed of the production line and by the point in time at which the sliding plate 212 begins to move. In this case, the entire length of the reserve fuse in the attachment device can be brought to the line of the production fuse at once.
  • the present invention serves, in particular, for the automatic insertion of a new template when the template which is in operation has been used up.
  • the device according to the invention also immediately changes the feed element in the ready position into the operating position in the manner described, whereupon the spinning process continues, possibly after a brief interruption.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Basic Packing Technique (AREA)
EP88109892A 1987-06-24 1988-06-22 Aus Stapelfaser-Vorlage Fäden produzierende Spinnmaschine Expired - Lifetime EP0296546B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH237787 1987-06-24
CH2377/87 1987-06-24

Publications (2)

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EP0296546A1 EP0296546A1 (de) 1988-12-28
EP0296546B1 true EP0296546B1 (de) 1993-09-01

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EP88109892A Expired - Lifetime EP0296546B1 (de) 1987-06-24 1988-06-22 Aus Stapelfaser-Vorlage Fäden produzierende Spinnmaschine
EP88109893A Expired - Lifetime EP0296547B1 (de) 1987-06-24 1988-06-22 Verfahren und Vorrichtung zum automatischen Anlegen eines Stapelfaserbandes

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EP (2) EP0296546B1 (enrdf_load_stackoverflow)
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Also Published As

Publication number Publication date
DE3883629D1 (de) 1993-10-07
DE3873435D1 (de) 1992-09-10
US5105614A (en) 1992-04-21
IN172151B (enrdf_load_stackoverflow) 1993-04-17
CS277008B6 (en) 1992-11-18
JPH0197227A (ja) 1989-04-14
US4964267A (en) 1990-10-23
EP0296546A1 (de) 1988-12-28
EP0296547B1 (de) 1992-08-05
ES2034038T3 (es) 1993-04-01
CN1032370A (zh) 1989-04-12
US4838018A (en) 1989-06-13
CS425388A3 (en) 1992-04-15
CN1017911B (zh) 1992-08-19
US4970855A (en) 1990-11-20
EP0296547A1 (de) 1988-12-28
JPS6420333A (en) 1989-01-24
BR8803050A (pt) 1989-01-10

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