EP0347535A1 - Procédé et dispositif pour saisir pneumatiquement et dévider à la défilée le bout du fil d'une cannetie - Google Patents

Procédé et dispositif pour saisir pneumatiquement et dévider à la défilée le bout du fil d'une cannetie Download PDF

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Publication number
EP0347535A1
EP0347535A1 EP89106039A EP89106039A EP0347535A1 EP 0347535 A1 EP0347535 A1 EP 0347535A1 EP 89106039 A EP89106039 A EP 89106039A EP 89106039 A EP89106039 A EP 89106039A EP 0347535 A1 EP0347535 A1 EP 0347535A1
Authority
EP
European Patent Office
Prior art keywords
cop
guide surface
air
thread
support element
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.)
Granted
Application number
EP89106039A
Other languages
German (de)
English (en)
Other versions
EP0347535B1 (fr
Inventor
Paul Surkamp
Ulrich Dr.-Ing. Wirtz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Oerlikon Textile GmbH and Co KG
Original Assignee
W Schlafhorst AG and Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by W Schlafhorst AG and Co filed Critical W Schlafhorst AG and Co
Publication of EP0347535A1 publication Critical patent/EP0347535A1/fr
Application granted granted Critical
Publication of EP0347535B1 publication Critical patent/EP0347535B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H67/00—Replacing or removing cores, receptacles, or completed packages at paying-out, winding, or depositing stations
    • B65H67/08—Automatic end-finding and material-interconnecting arrangements
    • B65H67/086—Preparing supply packages
    • B65H67/088—Prepositioning the yarn end into the interior of the supply package
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • the invention relates to a method and device for pneumatically detecting and pulling off the end of the thread of a cop by means of an air flow swirling up and / or helically sweeping the surface of the cop from below.
  • Such methods and devices are used to prepare a cop for unwinding.
  • a cop originating from a ring spinning machine usually has a rear winding that leads downwards in a helical line with a large pitch from the tip cone over the cylindrical part of the cop.
  • Sometimes the back winding also ends in a winding around the base of the sleeve.
  • cops are wound into cross-wound bobbins in winding machines or automatic winding machines. For this it is necessary to grasp the end of the thread.
  • the invention has for its object to provide a reliably working device with which the thread end can be pneumatically detected and removed overhead of the cop.
  • this object is achieved in that the cop is brought to roll and / or to tumble within a guide surface surrounding the cop during the flow of air and that the thread end is gripped above the cop sleeve and / or automatically in a standby position a thread connecting device, winding device or the like is transferred.
  • the guide surface can be, for example, a helically guided surface around the cop. It can also be a surface which is guided in a ring around the cop. A plurality of such surfaces could also be arranged one above the other. The superimposed surfaces could be so close together that they in turn act as a single surface, which would then be tubular, for example.
  • the cop is caused to roll and / or tumble to or within the guide surface by the air flow.
  • a special drive or a special drive device is unnecessary for the cop.
  • the cop is placed in a tube open at the top and is exposed there to an air flow going from bottom to top against the winding direction in a helical and / or swirling manner while at the same time rolling and / or tumbling brought.
  • the tube length corresponds approximately to the length of the cop.
  • the tube should be at least as long as the bobbin winding.
  • the inner diameter of the guide surface is slightly larger than the thread winding diameter of the cop. The tangential and at the same time upward, helically moving air flow around the cop is able to solve foot turns as well as back turns or even top turns under the condition that the cop rolls along the guide surface wobbling.
  • the bobbin winding lies against the inner wall of the tube solely under the influence of the air flow, the bobbin rotating is moved. It rolls over the inner surface of the tube, so that it rotates around two axes. First, it performs a rotational movement about the central axis of the tube forming the guide surface and secondly, a rotational movement about its own longitudinal axis. The Kops rolls against the direction of flow tumbling on the guide surface. This results in a substantial increase in the relative speed between the surface of the cop and the flowing air, without the cop also receiving an external drive. The thread end is detached and pulled off quickly and effectively. The direct blowing onto the cop surface, as is customary in known devices, is avoided. This reduces the risk of pulling thread loops or double threads from the surface of the cop.
  • the air flow can be stopped if it should not be maintained to a reduced extent to support the subsequent unwinding of the cop.
  • the standby point mentioned can be located on the cop itself. It can be, for example, the inside of the head sleeve, into which the thread end is sucked in, for example, by suction air after it has reached the head of the head sleeve.
  • the thread connecting device mentioned can be, for example, a knotting or splicing device of an automatic winder, for which the cop is prepared for unwinding.
  • the end of the thread can also be fed directly to the winding device if, for example, the winding of a new package is started there.
  • the device is therefore located at the unwinding point of the winding device.
  • the unwinding will take place without thread breakage.
  • cleaning is usually carried out, in which weak points and thick points of the thread are eliminated and replaced by a knot or a splice connection.
  • Such a thread break usually occurs above a thread tensioner, so that the thread has not yet been lost on the bobbin and can be automatically picked up by the winding device on the thread tensioner, on a thread rake present there or on a similar or other holding device.
  • the air flow is switched on for a predeterminable time and that if the transfer of the thread end is unsuccessful, the process for pneumatic detection and pulling off overhead is advantageously repeated one or more times in succession.
  • the number of repetitions can be specified in advance.
  • the handover is not always successful the first time. Sometimes it only succeeds the second or third time. But if the thread end cannot be detected after four to five repetitions, the cop should be discarded and by one others are replaced because the automatic detection of the thread end is no longer to be expected.
  • the separated cops can, for example, be collected and prepared by hand.
  • a new and inventive device for carrying out the method for pneumatically detecting and pulling off the end of the thread is characterized in that the cop is surrounded alongside by a guide surface which is provided with tangential and at the same time obliquely upwardly directed air nozzles, below the guide surface surrounding the cop the cop carrying the cop and enabling it wobble movements or rolling movements is arranged for the cop sleeve.
  • the guide surface can, for example, be guided around the cop along a helical line at a distance from the cop surface.
  • other advantageous arrangements of the guide surface are also possible.
  • the support element can consist, for example, of a flat or curved plate.
  • the cop can be introduced into the guide surface surrounding it, for example by axial movement of either the guide surface or the support element or both parts.
  • Devices for gripping the pneumatically raised thread end can be provided above the cop.
  • the guide surface is arranged concentrically to a preferably vertical axis and is kept free from projecting parts, in order in particular not to hinder disturbances of the wobble movements or rolling movements of the cop along the guide surface.
  • the guide surface advantageously has the shape of a tube or a cylinder. It can advantageously also be funnel-shaped, the larger opening of the funnel-like trained tube is advantageously above. This is mainly because it should be ensured that the upper end of the tube remains completely free and has no constrictions.
  • the support element is designed as a transportable disk provided with a push-on pin for the head sleeve.
  • the head sleeve lies, for example, on the disk, while the push-on pin is in the head sleeve with a relatively large amount of play.
  • the guiding game enables the cop to make sufficient lateral movements during the blowing time so that it can roll on the guiding surface.
  • an upwardly projecting bottom elevation is arranged under the disc center to support the disc.
  • the bottom elevation can, for example, have a spherical shape or have an upward point. If the pane is to wobble around a central point, it is advantageous if, in a further development of the invention, it has a central recess on its underside.
  • the push-on pin has a conical base or is itself conical.
  • a thread catching device is arranged above the guide surface and above the sleeve tip.
  • the guide surface is longitudinally divided into at least two parts which can be moved relative to one another in order to facilitate the introduction and release of the cop. If the guide surface is in two parts, each of the two parts can be moved to the side to allow the cop to enter from the side. Then the guide surface halves can be moved back so that they enclose the cop, whereupon the pneumatic cop treatment can begin. The parts can also be opened.
  • each unwinding point of an automatic winder is assigned a device for the pneumatic detection and pulling off of the end of the thread and that the support element also forms part of the unwinding point of an automatic winder.
  • cops standing on support elements can advantageously be transported along a transport path to the unwinding point and the unwound cops can be transported further along the transport path from the unwinding point.
  • the guide surface which may be divided in two, can be removed from the unwinding point and delivered to the unwinding point, and the further transport of the support element can be blocked as long as the guide surface is delivered to the unwinding point.
  • the bobbin preparation takes place, that is, the pneumatic detection and pulling of the end of the thread overhead at the unwinding point of the automatic winder. Immediately afterwards, the unwinding begins and the transport of the support element is blocked for that long.
  • the device is characterized by switching devices for the flowing air, for repeating the thread search process, for adjusting the guide surface and / or for adjusting and removing the cop or its support element and the removal of the empty sleeve or its support element.
  • the blowing pressure effective at the air nozzles can be changed.
  • the space enclosed by the guide surface can advantageously be connected to a source of suction air so that the bobbin can be vacuumed or dedusted during unwinding.
  • the suction air can advantageously be discharged via the air nozzles.
  • the air nozzles are pivotably arranged on the walls of the guide surface. This can be done, for example, by providing ball-and-socket arrangements on the walls.
  • the ball socket is located on the wall, the ball stored in it carries the air nozzle. It can be provided to block the ball-and-socket arrangement after the most favorable blow-out direction has been found, so that the setting is retained.
  • detents can also be provided, which make it possible to find and set several previously defined blow-out directions again and again without much effort.
  • a special cop preparation station 1 is provided for cop preparation.
  • a stationary support element 2 is present at the cop preparation station 1.
  • the support element 2 On its upper side, the support element 2 is plate-shaped. It carries the cop sleeve 3 of a cop 4.
  • the cop 4 is, for example, a spinning cop manufactured in a ring spinning machine, which is to be prepared for unwinding by introducing its thread end 5 into the interior of the cop sleeve 3.
  • the thread end 5 lying on the surface of the cop for example in the form of a backward winding, must be pneumatically detected and pulled off overhead of the cop 4.
  • an open top and bottom tube 6 is stationed above the support element 2, the inner surface 6 'serves as a guide surface for flowing air and for the cop 4.
  • the tube 6 or the guide surface 6 ' is provided with tangential and at the same time obliquely upward air nozzles 7, 8, 9.
  • the air nozzle 7 opens at the level of the tip cone 4 ', the air nozzle 8 at the level of the piecing cone 4 ⁇ of the cop 4 in the interior of the tube 6.
  • the two air nozzles 7 and 8 are via a manifold 11 and a switching device for the blown air in the form of a controllable valve V 1 connected to a compressed air source 12.
  • the air nozzle 9 is connected via a further switching device V 2 for the compressed air to the same compressed air source 12.
  • the thread catcher 20 has an intake pipe 21 which is connected via a controllable valve V 4 to a vacuum source 22.
  • valve V 4 As soon as the valve V 4 is opened, which can also happen when the valve V 1 is opened, suction air flows into the intake pipe 21 in the direction of the arrow 23. As a result, the pneumatically flung thread end 5 is forced to enter the suction pipe 21 and to migrate there in the direction of the vacuum source 22. The thread end 5 is guided past a sensor 24, which is connected by a control line 25 to a switching device 29 for the flowing air.
  • the switching device 29 causes the switching device 29 to actuate a thread scissors 34 via the control line 25, which is connected to the switching device 29 by a control line 26.
  • the switching device 29 causes the control valve 27 to close the valve V 4 and the control valve 28 to close the valve V 1 and, at the same time, to open a valve V 3 the upper saddle of the support element 2.
  • the valve V 3 is also connected to the vacuum source 22.
  • the in the direction of arrow 36 by the Air flowing in the suction channel 35 induces in the head sleeve 3 an air flow which goes from top to bottom and which now pulls the thread end, which has been separated above the sensor 24, into the head sleeve 3.
  • the switching device 29 closes the valve V 3 again automatically.
  • the thread end 5 is inside the head sleeve 3 and the head can be removed from the top of the tube 6 or, for example, by swiveling the support element 2 downwards and replaced by another head to be prepared.
  • a piece of thread that may hang out of the sleeve 3 downwards can be separated by controlled separating elements (not shown here).
  • a cop preparation operation is started, for example, by a switching device 30 which can be actuated manually or also by an automatic system and is connected to the valve V 1 or V 4 by control lines 37, 38. Both valves are opened and the pneumatic detection and pulling off of the end of the thread of a cop placed in the tube 6 can begin again.
  • Fig. 2 shows that the air outlet nozzle 9 also opens tangentially into the tube 6, but opposite to the tangential openings of the air nozzles 7 and 8.
  • the air outlet nozzle 9 opens out at the height of the cylindrical part of the cop 4.
  • the air nozzles 7 and 8 lie vertically one above the other here.
  • the tangential arrangement of the air nozzles ensures gentle treatment of the heads. Direct blowing on the bobbin wrap can lead to fraying and thus damage to the yarn. Only in the area of the base of the sleeve, where underwings can be attached from case to case, can a blowing nozzle be directed against the head sleeve, because it is irrelevant whether the yarn forming the underwire is damaged or not.
  • the inner diameter of the air nozzles which may consist of simple tubes, is in the range of 1 mm to 10 mm.
  • Fig. 3 shows an overall designated 1 'device for pneumatic detection and pulling off the end of the thread, on which a cop 40 is being unwound.
  • the thread 41 is drawn off by the winding device, which is not shown in detail here, overhead of the cop 40 at a relatively high take-off speed, a guide surface 44 surrounding the cop 40 serving as a sleeve also serving as a balloon breaker.
  • the guide surface 44 is arranged concentrically to a vertical axis 45 and is kept free from projecting parts of the air nozzles, of which only the air nozzle 10 is shown.
  • the air nozzle 10 is tangential and at the same time directed obliquely upwards, as is the case in particular Fig. 3 shows. It is pivotably arranged on the wall of the guide surface 44 by means of a ball-and-socket arrangement 64. Beneath the guide surface 44 surrounding the cop 40 there is arranged a support element 46 for the cop sleeve 47 which supports the cop 40 and enables it to wobble or roll.
  • the support element 46 is designed as a transportable disk provided with a push-on pin 48 for the head sleeve 47.
  • the guide surface 44 is longitudinally divided according to FIG. 4 for better reception and release of the cop 40.
  • the rear part 44 ' is connected to a switching device 31, the front part 44 ⁇ with a switching device 32.
  • the switching devices 31 and 32 are pneumatic piston / cylinder arrangements which are able to remove the two parts 44 'and 44' from each other in the horizontal direction from the closed position according to FIG. 4, so that the cop 40 coming from the left can be brought to the unwinding point 39.
  • the unwound sleeve 47 can later be removed to the right in order to make room for a next cop 50.
  • the air nozzle 10 is pressurized, as in the first embodiment, so that the thread end comes loose and is thrown upwards into the thread catching device 43, via which the winding device (not shown in detail here) automatically catches the thread end, puts it against an empty bobbin tube of a cheese or feeds a thread connecting device.
  • FIG. 3 and 4 show still further support elements 51 and 52. All support elements stand on a transport path 53 in the form of a transport belt which is guided over a belt roll 54.
  • a drive motor designed as a stepper motor is integrated into the belt roll 54 and can be controlled by a switching device 33.
  • All support elements 46, 51, 52 are disc-shaped and carry push-on pins 48 and 55, respectively.
  • the disk-shaped support elements 46, 51, 52 move step by step in each case.
  • the support element 52 carries a reeled-off sleeve.
  • the support element 52 with the attached sleeve 56 is passed on in the direction of arrow 19 to a lower-lying conveyor belt, not shown here.
  • the support element 46 then takes the place of the support element 52, the cop 40 of which is being unwound.
  • the support element 51 with its attached cop 50 then takes the place of the support element 46.
  • the two switching devices 31 and 32 are actuated to open the guide surface 44.
  • the two switching devices 31 and 32 are actuated again in order to close the guide surface 44 again.
  • the conveyor belt 53 moves gradually in the direction of arrow 57 from left to right.
  • Fig. 4 shows that the air outlet nozzle 10 is flowed through in the direction of arrow 18.
  • the cop 40 comes into a rolling motion, similar to the cop 4 of the previous exemplary embodiment.
  • the further transport of the support element 46 is blocked by the switching device 33 as long as the guide surface 44 is delivered to the unwinding point 46.
  • the blocking of the support element carrying the bobbin to be unwound can also be done in other ways, for example by switchable clamp members, switchable retaining levers or the like.
  • the switching device 29 can, for example, be set up for repetitions of the thread search process of this type. For this purpose, it receives a further control line 28 with which it is connected to the switching device 30. If the sensor 24 has not detected the presence of the thread end 5 after a predetermined period of time, the switching device 29 automatically closes the valves V 1 and V 4 via the control lines 28 and 27. The valve V 3 becomes, although the thread end is not present , open for a limited time. After the valves V 1 and V 4 have closed, the switching device 29 causes the switching device 30 to switch the valves V 1 and V 4 on again via the control line 58.
  • the search process can then be repeated.
  • the number of permitted repetitions can be set on a setting button 59 on the switching device 29. If the last attempt should also fail, the switching device 29 closes the valves V 1 and V 4 and switches on a malfunction indicator lamp 60 via the line 31 in order to alert a guard to the malfunction.
  • the push-on pin 44 could alternatively be spreadable in order to give the cop a better hold during the unwinding.
  • the spreading of the plug pin 44 could be caused by an automatic system, not shown here, on the part of the winding unit.
  • blow pressure could be changed after a failed preparation attempt.
  • a self-comparison could be carried out.
  • the air pressure setting with the fewest failed attempts could then automatically be maintained.
  • the blown air could also be emitted at pressure intervals (stuttering).
  • the valves V1, V2 would have to be set up so that they open and close in quick succession.
  • An automatic air nozzle adjustment would also be advantageous if necessary.
  • the thread catching device could alternatively be installed on a swivel arm.
  • the baffle surface can be connected to a suction system, so that the dust which is formed directly on the bobbin can be continuously sucked off during unwinding.
  • separate suction nozzles can be provided.
  • a switchover device could alternatively connect the existing blowing nozzles to a suction air source instead of the compressed air source.
  • Fig. 3 shows that the guide surface 44 has a suction nozzle 62 which is connected to a suction air source 63. In the suction air source 63 there is always negative pressure only when the cop 40 is unwound.
  • the guide surface parts 44 ', 44' could remain a gap wide open during unwinding, so that the suction air can be passed through the gap.
  • the blowing could also pass through such a gap or through the edge of the guide surface parts 44 ', 44 ⁇ , for example semicircular recesses are made.
  • the air nozzles did not need to be firmly connected to the guide surface parts, as the exemplary embodiments show.
  • the direction of the blowing air can easily be optimally adjusted to the winding direction of the cop and to the effectiveness of the thread loosening.
  • the training according to FIG. 5 differs from the training according to FIG. 1 in the following ways:
  • the support element 46 ' is designed as a transportable, provided with a plug-on pin 48' for the head sleeve 3 disc.
  • a plug-on pin 48' for the head sleeve 3 disc.
  • an upwardly projecting bottom elevation 65 is present under the center of the disc, which has a spherical shape. Therefore, the support element 46 'can join the wobble movements of the cop 4 or support them.
  • the training according to FIG. 6 differs from the training according to FIG. 5 by the following:
  • a bottom elevation 66 with an upwardly pointing tip 67 is present under the center of the pane.
  • the disc 46 ' has on its underside a central saddle 68', in which the tip 67 engages. In this arrangement, the disc 46 'has the possibility of wobbling.
  • the training according to FIG. 7 differs from the training according to FIG. 3 by the following:
  • the support element 46 ⁇ lying on the transport path 53 for the sleeve 47 of the cop 40 has a push-on pin 48 ⁇ which has a conical foot 69. This arrangement also allows the sleeve 47 and thus the cop 40 wobble movements regardless of whether the disc 46 ⁇ itself is resting or executing circular movements on the transport path.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Replacing, Conveying, And Pick-Finding For Filamentary Materials (AREA)
EP89106039A 1988-06-24 1989-04-06 Procédé et dispositif pour saisir pneumatiquement et dévider à la défilée le bout du fil d'une cannetie Expired - Lifetime EP0347535B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3821343A DE3821343A1 (de) 1988-06-24 1988-06-24 Verfahren und einrichtung zum pneumatischen erfassen und ueberkopfabziehen des fadenendes eines kopses
DE3821343 1988-06-24

Publications (2)

Publication Number Publication Date
EP0347535A1 true EP0347535A1 (fr) 1989-12-27
EP0347535B1 EP0347535B1 (fr) 1993-06-30

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EP89106039A Expired - Lifetime EP0347535B1 (fr) 1988-06-24 1989-04-06 Procédé et dispositif pour saisir pneumatiquement et dévider à la défilée le bout du fil d'une cannetie

Country Status (4)

Country Link
US (1) US4921179A (fr)
EP (1) EP0347535B1 (fr)
JP (1) JPH02106565A (fr)
DE (2) DE3821343A1 (fr)

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US6735814B2 (en) 2000-10-05 2004-05-18 Mister Services, Inc. Apparatus for cleaning hard-to-reach areas

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DE4039486A1 (de) * 1990-12-11 1992-06-17 Zinser Textilmaschinen Gmbh Verfahren und vorrichtung zum selbsttaetigen fadenansetzen an einer spinnereimaschine
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CN103484998B (zh) * 2013-09-06 2016-02-03 青岛环球集团股份有限公司 一种用于粗纱机的负压生头装置及负压生头方法
JP2017193435A (ja) * 2016-04-22 2017-10-26 村田機械株式会社 糸処理装置
JP2018177418A (ja) * 2017-04-07 2018-11-15 村田機械株式会社 ボビン処理装置
CN111891836B (zh) * 2020-07-17 2022-03-04 青岛宏大纺织机械有限责任公司 一种托盘式络筒机及络筒生产方法

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Also Published As

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US4921179A (en) 1990-05-01
EP0347535B1 (fr) 1993-06-30
JPH02106565A (ja) 1990-04-18
DE3821343A1 (de) 1989-12-28
DE58904834D1 (de) 1993-08-05

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