EP0063932B1 - Dispositif pour couper, aspirer, et enfiler un fil en déplacement - Google Patents

Dispositif pour couper, aspirer, et enfiler un fil en déplacement Download PDF

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Publication number
EP0063932B1
EP0063932B1 EP19820302093 EP82302093A EP0063932B1 EP 0063932 B1 EP0063932 B1 EP 0063932B1 EP 19820302093 EP19820302093 EP 19820302093 EP 82302093 A EP82302093 A EP 82302093A EP 0063932 B1 EP0063932 B1 EP 0063932B1
Authority
EP
European Patent Office
Prior art keywords
yarn
blade
cutter
slot
yarns
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
Application number
EP19820302093
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German (de)
English (en)
Other versions
EP0063932A2 (fr
EP0063932A3 (en
Inventor
Max Lee Cardell
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Celanese Corp
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Celanese Corp
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Filing date
Publication date
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Publication of EP0063932A2 publication Critical patent/EP0063932A2/fr
Publication of EP0063932A3 publication Critical patent/EP0063932A3/en
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Publication of EP0063932B1 publication Critical patent/EP0063932B1/fr
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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
    • B65H54/00—Winding, coiling, or depositing filamentary material
    • B65H54/70—Other constructional features of yarn-winding machines
    • B65H54/71—Arrangements for severing filamentary materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H54/00—Winding, coiling, or depositing filamentary material
    • B65H54/86—Arrangements for taking-up waste material before or after winding or depositing
    • B65H54/88—Arrangements for taking-up waste material before or after winding or depositing by means of pneumatic arrangements, e.g. suction guns
    • 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
    • B65H67/04—Arrangements for removing completed take-up packages and or replacing by cores, formers, or empty receptacles at winding or depositing stations; Transferring material between adjacent full and empty take-up elements
    • 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 present invention relates generally to high speed winding of filamentary material onto bobbins or spools to form packages of filamentary material. More particularly, it relates to the handling of man-made filament yarn (continuously fed at say 100 mph) during removal of a full package (sidewound, crosswound yarn on a tube) and transfer of the continuously fed filament yarn onto an empty, rotating, flangeless tube, after which a further yarn package is formed.
  • the manufacture of man-made or synthetic filament yarns is typically achieved by extruding a molten polymer, such as polyester, polyamide, etc, through hole(s) in a spinneret and then cooling the filament(s) thus formed. Thereafter, the filaments may be gathered together to form a multifilament yarn and, possibly after further treatment, are wound onto a tube so that a yarn package is formed.
  • a molten polymer such as polyester, polyamide, etc
  • Winding of the yarn is performed mechanically by winders which rotate one or more packages to wind-up the yarn while traversing the yarn along the package axis to achieve a uniform thickness of yarn being wound.
  • a doffing/donning operation (i.e., replacement of the yarn packages with empty tubes on the winder) is often performed manually by an operator who (i) severs the yarn, (ii) stops the rotary drive to the packages; (iii) re-establishes the rotary drive; and (iv) rethreads the yarn onto the empty tubes.
  • Severing of the filamentary yarn is typically performed with scissors while the inlet of a suction or aspirator gun is held against the yarn at a location above the point of severing. Once the yarn is severed, the tail end is wound onto the yarn package, while the newly formed leading end is sucked into the aspirator and fed to a waste collector. The suction gun is then placed onto a holder while the yarn packages are being replaced by empty tubes. When the empty tubes attain full speed, the operator manipulates the suction gun to attach the yarn to the rotating tubes so that this winding operation may begin.
  • a mechanism in which a cutter and aspirator are carried at the end of a reciprocable carrier arm.
  • the carrier arm is extendable toward a pair of traveling yarns in a direction parallel to the yarn package axis such that the cutter sequentially severs the yarns and the aspirator exhausts same to waste while the packages are being removed.
  • a pair of holders are arranged to capture the cut filaments being sent to waste.
  • the carrier arm and the holders are rotatable downwardly together to a location on the opposite side of the winders (i.e., the cutter, aspirator, and holders travel through a vertical plane containing the bobbin axis) to thread the yarn onto the empty tubes.
  • French Patent 2 307 745 there is disclosed an automatic filamentary yarn handling apparatus for use with a filamentary yarn winder of the type comprising a yarn package support and means for rotating at least one package about an axis of the support to wind up at least one filamentary yarn continuously fed towards the winder.
  • the apparatus includes (a) a gathering means located upstream of the package's rotary axis for displacement from a rest position towards the path of travel of the yarn, such gathering means including a cutter means for severing the yarn as the gathering means is displaced toward the yarn's path of travel and a suction means for continuously drawing in the yarn after severing has occurred, (b) yarn transfer means including at least one guide associated with the yarn being transferred and which is mounted for movement relative to the gathering means between spaced positions, the guide being arranged to engage the yarn upon the gathering means and return to its rest position with the severed yarns, and (c) displacement means for moving the transfer means relative to the gathering means with the yarn remaining engaged with the guide and moving the guide toward the package axis during a yarn rethreading sequence.
  • a gathering means located upstream of the package's rotary axis for displacement from a rest position towards the path of travel of the yarn, such gathering means including a cutter means for severing the yarn as the gathering means is displaced toward the yarn's
  • a particular type of cutter mechanism is disclosed in the afore-mentioned US Patent 4 108 388.
  • That cutter mechanism includes a pair of superimposed cutter blades which are relatively movable.
  • the blades include alignable slots which open to the side to admit a yarn directed toward the slot by cam surfaces at the front of the blades. After a yarn enters the slot, it becomes pinched between the relatively moving blades and is severed.
  • the sidewise entry direction of the slot demands that a relatively precise alignment occur between the cutter and the yarns to assure that the yarns contact the front cam surface.
  • an inadequate cutting action may result because the filaments begin to slacken immediately upon being pinched between the relatively moving blades.
  • United States Patent 3 175 290 is concerned with a portable yarn handling device which includes a cutter means provided with a fluid-actuated displaceable blade and suction means.
  • the present invention concerns a filamentary yarn aspirator of the type comprising a movable suction conduit including a suction inlet and a filamentary yarn cutter mounted' on the conduit below the inlet for severing a yarn which is thereafter drawn into the suction conduit, the cutter comprising first and second relatively movable blades one of the blades including a slot opening in a direction parallel to the suction conduit, characterised in that:
  • a spring is provided for displacing the reciprocable blade in one of its directions, the spring acting against the stationary blade 84 to urge the latter against the reciprocable blade.
  • the filamentary yarn aspirator advantageously comprises an aspirating passage for conducting air suction and including a first forwardly facing opening, yarn cutter means disposed beneath the opening and including first and second relatively movable blades, the first blade including a slot having a forwardly'facing opening for admitting a filamentary yarn and a lateral extension for trapping the yarn, the second blade including a cutting edge on the lateral extension, and means for producing relative movement between the blades to cause the edges to pass across one another to sever the yarn while the latter travels through the extension.
  • the gathering head is suited for mounting on a hand-held yarn cutter/aspirator which is manually manipulated by the operator.
  • a yarn cutter/aspirator 10 according to the present invention is depicted in Figure 1 in conjunction with a yarn winder, such as a conventional yarn winder 12 of the type marketed as model No SW 46 SSD by Barmag Barmer Maschinenfabrik AG.
  • the winder comprises a stationary frame 14 from which projects a yarn package axle or spindle 16 which supports a pair of conventional removable tubular packages 18, 18'.
  • the drive head 22 Disposed above the spindle 16 is a package drive head 22 which is vertically reciprocably carried by the frame 14. Conventional power mechanisms (not shown) within the frame 14 raise and lower the drive head 22 upon suitable actuation thereof.
  • the drive head 22 includes a helically grooved roll 24 mounted for rotation about an axis parallel to the package axle. During a winding operation, yarns F, F' pass downwardly through overhead guides or godets (not shown) and travel within the helical grooves 26, 26' of the roll 24 and also within horizontally reciprocable guides 28, 28' disposed above the respective grooves.
  • the roll 24 is rotatably driven and the traversing guides 28, 28' are reciprocated along the packages axis to achieve a uniform distribution of the wound filaments along the yarn packages.
  • each yarn bundle forming a fan-like pattern, the boundaries of which being indicated in broken lines ff, f'f' in Figure 1.
  • the yarn packages are driven by a drive roll (not shown) mounted on the drive head 22 behind the grooved roll 24.
  • the drive roll rotates the yarn package through frictional contact therewith.
  • the drive head 22 is pushed upwardly by the peripherally accumulating yarn layers while continuing to make peripheral drive contact therewith.
  • tailing guides 29, 29' Mounted on the winder above the grooved roll 24 are a pair of conventional tailing guides 29, 29' (Fig. 1) which contain slots for receiving the yarns. At the initiation of a winding operation, the tailing guides cause the yarns F, F' to be wound in a manner producing transfer tails on the tubes which facilitate eventual unwinding of the yarn by the user of the yarn.
  • These tailing guides 29, 29 are well-known and a further description thereof is unnecessary.
  • a conventional rod 30 Disposed at a lower side of the winder is a conventional rod 30 (see Fig. 8) which carries a pair of pig-tail shaped throw-on guides 32, 32'.
  • the rod includes a mounting section 30A which is mounted on the drive head 22 for rotation about an axis extending parallel to the package axis.
  • the rod 30 is normally stored behind the winder chuck but can be swung forwardly so that a mounting section of the rod extends parallel to the package axis.
  • the rod 30 carries a pair of throw-on guides 32 (only one throw-on guide 32 being depicted) which are aligned vertically with respective ones of guide arms 46, 46' to be discussed.
  • the throw-on guides 32 receive the yarns (see the solid line illustration in Fig. 8) and are then swung rearwardly (see the broken line position of Fig. 8) to carry the yarns against the package tube and into pinched slots formed in the packages, whereupon a new winding operation commences. Further details of this throw-on mechanism from US Patent 4146186 assigned to Barmag Barmer Maschinenfabrik AG, Federal Republic of Germany, the disclosure of which patent is hereby incorporated as if set forth at length herein.
  • the yarn handling mechanism comprises a movable gathering head 41 which includes a cutter mechanism 42 and an aspirator mechanism 44, and a pair of guide arms 46, 46' which are movable relative to the gathering head 41 to transfer the yarn to the empty packages.
  • the gathering head 41 forms part of a reciprocable unit 47 carried at the front end of an extendible/retractible rod portion 48 of a fluid actuated cylinder 60 (Fig. 17).
  • the cylinder 50 is mounted on a housing 52 which is swingable relative to the frame 14 about a vertical pivot post 54 (compare Figs. 10 and 12).
  • the reciprocable unit 47 further includes a casing 56 (Fig. 17) to which are mounted the front ends of a pair of elongate conduit tubes 58, 60 that travel along with the casing.
  • One of the tubes is connected at its rear end to a source of pressurized fluid, preferably air, and conducts that air through a cross bore 62 in the casing to the other tube 60.
  • the latter tube 60 comprises a conventional aspirator which includes a suction-inducing nozzle ring 64 through which the air is conducted. Flow of air rearwardly into a central passage 68 of the aspirator tube creates a suction at the inlet 70, which inlet is formed in a suction conduit extension 69 of the air exhaust tube 60 and is situated at the gathering head 41.
  • the thus-described aspirator is of a conventional nature, one suitable type being marketed by the Slack & Parr Corp.
  • the air inlet and exhaust tubes 58, 60 and the fluid cylinder rod 48 are slidably disposed within openings in a front wall 72 of the housing.
  • the tubes 58, 60 are also slidably disposed within apertures in a rear wall 74 of the housing.
  • a preferred gathering head 41 includes a sleeve 76 mounted on the forward end of the suction conduit 69 (Figs. 17, 19), which sleeve houses the cutter mechanism 42 as well as a tip 78 for the inlet of the suction conduit.
  • This tip is formed of low-friction material and includes a vertical slit 80 across the inlet 70, which slit receives filaments and locates same relative to the suction inlet 70.
  • the sleeve is held to the suction conduit 69 by means of a fastener 79 having a wedge face 79A which wedges against the conduit 69 when the fastener is installed (Fig. 21).
  • the cutter mechanism 42 is situated in a lower portion of the sleeve 76 and includes a pair of relatively movable cutter blades 82, 84 disposed within a chamber 86 of the sleeve.
  • One of the cutter blades 84 hereafter designated as a stationary blade, is freely mounted to the sleeve by a horizontal pin 85.
  • This stationary cutter blade 84 includes a forwardly projecting portion 88 which forms a yarn-catching slot 90.
  • This slot comprises a pair of forwardly diverging side walls 92, 94 communicating at their rear ends with a lateral portion of the slot in the form of a vertical through-passage 96.
  • the through-passage 96 includes a curvilinear front wall 98 which, at an upper surface of the plate, is relatively sharp to form a cutting edge, as will be discussed hereinafter.
  • the lower portion of the through-passage is flared outwardly at 100.
  • the other cutter blade 82 hereafter designated as the reciprocable blade, is mounted for reciprocable movement within the chamber 86 and carries an annular seal 102 to create a fluid-tight work compartment 104 (Fig. 22) within the chamber 86, which compartment 104 communicates with pressurized fluid, preferably air, via an inlet 106 in the sleeve 76.
  • This inlet 106 communicates with a flexible hose 108 (Figs. 17, 22) which is attached to a pipe 110 extending coaxially within the air inlet tube 58 (Fig. 17).
  • Rearward displacement is effected by means of a spring 112, preferably a coil compres- * sion spring, which acts between the reciprocable cutter member 82 and a rear end of the yarn- capturing blade member 84.
  • the spring 112 acts against the stationary blade 84 below the pin 85 so that a movement is imparted to the stationary blade 84 which tends to press the latter against the reciprocable blade 82.
  • the plane of the stationary blade extends upwardly at an angle a of from one to three degrees (preferably two degrees) relative to the plane of the stationary blade to assure a line-to- surface contact therebetween and facilitate self- sharpening of the blades.
  • the front end of the reciprocable blade 82 includes a sharp edge 120 disposed in contact with the upper surface of the stationary blade 84. Preferably this edge 120 extends perpendicularly to the direction of reciprocation of the blade 82. During a forward stroke of the reciprocable blade the edge 120 passes completely across the through-passage 96 in the stationary blade 84. Accordingly, a yarn F which is captured within the through-passage is severed by a highly efficient combination scissors/shear action between the straight edge 120 and the curved upper edge of the front wall 98 of the through-passage (Fig. 22). The diameter of the yarn F is exaggerated in Figures 19, 22 for clarity.
  • the reciprocable cutter member is constrained for rapid "snap-like" movement.
  • This is achieved by a spring-biased ball detent 122 which engages a recess 124 in the top surface of the reciprocable blade 82 when the latter is in a retracted or rearward position (Fig. 19).
  • the detent 122 prevents reciprocable movement of the latter until a selected pressure build-up occurs in the working compartment 104.
  • the through-passage 96 of the stationary blade 84 is disposed rearwardly of the yarn-receiving slit 80 of the aspirator tip 78 to assure that at the instant severing occurs, the yarn F is pressed firmly into the slit 80 and thus suitably positioned for capture by the induced suction at the aspirator inlet 70.
  • Reciprocation of the reciprocable blade 82 is produced, as noted earlier, by alternately supplying pressurized fluid to, and exhausting it from, the work compartment 104. This is achieved by means of a cam-operated poppet valve 126 (Fig. 17) which is actuated by two sets of cams 128, 128' carried by cam bars 130, 130' mounted on the aspirator air inlet tube 58.
  • the poppet valve 126 is of a conventional nature and has a fluid inlet 131 which is connected to the pressurized fluid source, and a fluid output 132 to which the rear end of the fluid supply pipe 110 is connected via a flexible hose 134 (see Figs. 17, 10).
  • a spring-biased cam follower arm 136 of the valve is arranged to be sequentially contacted and displaced by the cams 128 on the aspirator fluid supply tube 58.
  • the cam follower arm 136 opens the poppet valve 126 and directs fluid to the working compartment 104 of the sleeve 76 to urge the reciprocable blade 82 forwardly.
  • the poppet valve is mounted on the housing 52 and thus remains stationary while the reciprocable unit 47 is being displaced forwardly and rearwardly.
  • a pair of limit switches 140, 142 (Fig. 10) which are contacted and activated by portions of the reciprocable unit 47 to create signals when the reciprocable unit is in extended and retracted positions. That is, the first limit switch 140 is activated when the casing is in a fully extended condition, and the second limit switch 142 is activated when the casing is in a fully retracted condition.
  • the housing 52 is rotatable about a vertical pivot pin 54. That pivotal movement is imparted by a fluid-actuated ram 146 (Fig. 10) which is pivotably mounted between the frame 14 and the housing 52.
  • the ram 146 is actuated in response to activation of the second limit switch 142 when the reciprocable unit 147 returns to its retracted position.
  • Third and fourth limit switches 150, 152 are mounted on the frame 14 and are activated when the housing 52 is in a rotated position (Fig. 12) and a non-rotated position (Fig. 10), respectively. The purpose of these limit switches is to provide signals for actuating the machine logic, as will be explained subsequently.
  • a first adjustable limit screw 153 is mounted on the housing 52 and is engageable with a portion 154 of the frame 14 to define a stop for the housing in a rotated condition (Fig. 12).
  • a second adjustable limit screw 156 is mounted on the frame 14 and is engageable with the housing 52 to define a stop for the latter in its non-rotated condition (Fig. 10). Rotation of the housing 52 is the last movement in the operation of the gathering head portion of the yarn handling mechanism.
  • the operation of the gathering head 42 commences at the termination of a winding step, i.e., when it is time to doff the filled packages 18, 18'.
  • a signal is sent, either by an operator pushing a "stop" button on the winder 10 or perhaps by a computer in an automated plant, which causes the fluid cylinder 50 of the yarn handling mechanism to extend the gathering head forwardly.
  • the front end of the yarn capturing slot 90 in the stationary blade 84 is generally coplanar with both yarns F, F' with the dimension of the slot mouth or inlet being large enough to accommodate displacements of the yarns from such common vertical plane.
  • the initial yarn F will enter the slot 90 and become captured in the through-passage 96.
  • the yarn F becomes confined within the vertical slit 80 in the aspirator tip 78 and is thus aligned with the suction inlet 70.
  • the yarn F When severed, the yarn F is immediately caught-up in the continuously induced suction as the aspirator inlet 70 and is conducted to waste via the air outlet tube 60.
  • the gathering head 41 continues forwardly and performs a similar severing of the second yarn F'.
  • both yarns F, F' are being exhausted to waste, enabling the package 18, 18' to be replaced, either manually or perhaps by an automated robot.
  • the limit switch 140 is activated and signals the drive head 22 to ascend, thereby breaking the drive connection to the yarn packages which are automatically braked.
  • the guide arms 46, 46' are affixed to a hollow shaft 170 which is oriented parallel to the package axis.
  • This shaft 170 is rotatably mounted on a coaxial bar 172 (Fig. 23) which is, in turn, affixed to a vertically traveling carriage 174 (Figs. 2 and 23).
  • the shaft 170 rotates relative to the bar 172 about the common longitudinal axis thereof.
  • a spring preferably a coil spring 176, is connected between the free ends of the shaft and bar by means of pins 178, 180 carried thereby, to bias the shaft (a) rotationally to a position wherein the guide arms 46, 46' are in a rest condition out of the common vertical plane of the yarns, and (b) longitudinally inwardly against a stop element 182 on the bar to properly locate the guide arms along the axis of the shaft.
  • the rotational positioning of the shaft 170 is determined by the spring 176 in conjunction with cam surfaces 202, 204, 206 as will be discussed.
  • the carriage 174 is mounted for vertical sliding movement upon a stationary upright pole 184.
  • a conventional fluid-actuated cable cylinder 186 which includes an internal fluid-actuated piston 188 and cables 190, 192 extending from opposite sides of the piston 188 and passing through seals (not shown) at ends of the cylinder 186.
  • Each cable 190, 192 passes around a freewheeling pulley 194, 196 and is connected to the carriage 174 such that movement of the piston 188 in one direction creates movement of the carriage 174 in the opposite direction.
  • the cam bar 200 comprises first, second and third cam surfaces 202, 204, 206 arranged to be contacted by first and second wheels 208, 210 of a cam follower 212 fixedly mounted on the shaft 170.
  • the first and second cam surfaces 202, 204 are separated by a straight surface 205. It will be appreciated that as the carriage 174 ascends and the first cam follower wheel 208 rides upon the first cam surface 202, the shaft 170 will be rotated (clockwise as viewed in Fig.
  • the stop latch 220 comprises a horizontal bolt 221 which slides horizontally in an aperture 222 of the cam bar 200 and is biased by a spring 223 to a position in the travel path of the stop 182 carried by the carriage 174.
  • the bolt 221 is releasable by means of a lever 224 which is pivoted to the cam bar 200 about a horizontal axis 226 and which includes a leg 228 extending into a recess 230 of the bolt 221.
  • a contact leg 234 of the lever 224 extends into the vertical travel path of a cam face 236 of the winder head 12 such that as the winder head 12 is raised (during a yarn package doffing sequence), the bolt 221 is slid open to enable the carriage 174 to complete its ascent, with ensuing rotation of the guide arms 46, 46' as the cam follower wheel 208 rides along the cam surface 202.
  • the latch is disposed sufficiently above the winder head 12 to assure that release of the latch occurs only after the gathering head 41 has severed and aspirated both yarns F, F'. Return of the gathering head 41 to its retracted position cannot occur until the carriage reaches its uppermost position (i.e., until the carriage activates an upper limit switch (not shown)). In this fashion, the carriage completes its ascent and the ends of the guide arms 46, 46' are rotated forwardly into the common plane of the yarns F, F', before the gathering head retracts (Fig. 5).
  • a first of the guide arms 46 is thus situated inwardly of the first yarn F (i.e., between the frame 14 and the first yarn F), and the second guide arm 46' is situated between the yarn F, F'.
  • the gathering head is thereafter retracted, the severed yarns F, F' enter grooves 240 formed in the free ends of the guide arms 46, 46'. The yarns thus pass through those grooves 240 on their way to waste via the aspirator.
  • the limit switch 142 is activated causing the fluid ram 146 to swing the housing 52 about the pin 54 (Figs. 6 and 12). The mechanism remains in this position while the packages are replaced (either manually or automatically).
  • the descent sequence begins with the application of a subsequent signal, either manually from an operator or automatically from an automated system.
  • a subsequent signal either manually from an operator or automatically from an automated system.
  • the winder head 22 descends toward the packages and the cable cylinder 186 lowers the carriage 174.
  • the first cam follower wheel 208 travels down the cam 202A of the cam bar, whereupon the shaft 170 is rotated under the influence of the spring 176 (Fig. 23) to move the free ends of the guide arms 46, 46' out of the yarn plane while pulling the yarns therealong.
  • the first cam follower wheel 208 rides along the second cam surface 204 and rotates the outer ends of the guide arms 46, 46' (against the bias of the spring 176) away from the winder and out of the path of the tailing guides 29, 29'.
  • the spring 176 returns the guide arms to a position wherein their outer ends lie beneath the tailing guides 29, 29'. Accordingly, the yarns F, F' are installed into slots thereof open toward the guide arms 46, 46' rather than in a direction parallel to the package axis (as is standard in manual doffing systems).
  • the second cam follower wheel 210 contacts the third cam surface 206 and causes the ends of the guide arms 46, 46' to be swung still further toward the winder to a position just below and beyond the standard throw-on guides 32.
  • the carriage 174 engages a lower limit switch (not shown) to actuate a timer which, after counting- down to enable the bobbins to reach full speed (the latter being engaged and driven by the drive unit 22), signals the control mechanism for the throw-on guides 32.
  • the guides 32 are then rotated to carry the yarns under the packages and into standard pinch grooves in the packages. The yarns are thus placed in tension between the aspirator and the pinch grooves and are caused to break. Accordingly, the tailing endS" ⁇ fLt1e yarns are sucked to waste, the newly formed lead ends of the yarns are wound upon the packages (Fig. 9), and the carriage re-ascends into engagement with the stop latch 220.
  • the present invention could be designed to insert the yarns directly into the package pinch grooves.
  • a filamentwinding operation proceeds in the usual fashion, with the drive unit rotating the yarn package and gradually rising as the package becomes filled.
  • the yarns F, F' travel downwardly through the traversing guides 28,28' through the helical slots 26, 26' in the driven roll 24, and onto the packages 18, 18'.
  • the yarn handling apparatus 40 waits in a park or rest mode (Figs. 1, 2, 3, and 10), with the carriage 174 being urged upwardly by the cable cylinder 186 against the stop latch 220 (Figs. 3 and 15). In this position, the free ends of the guide arms 46,46' are located outwardly from the common vertical plane of the yarns F, F'.
  • the gathering head 41 awaits in a retracted position generally within that common plane.
  • a signal is furnished to the machine.
  • This signal may be produced by an operator manually pushing a "stop" button on the winder (Fig. 3), or by means of a signal from a computer if the winder is part of an automated system.
  • pressurized fluid is supplied to the hydraulic cylinder 50 which extends the reciprocable mechanism 47, including the gathering head 41, toward the yarns F, F'.
  • the first or inner yarn F enters the slot 90 of the stationary blade 84 and becomes trapped within the lateral position 96 of that slot (Fig. 19).
  • the yarn F is thus received within the vertical slit 80 in the aspirator tip 78 and is pressed tightly therein as the yarn F continues to be wound upon the package 18.
  • pressurized fluid is supplied to the working compartment of the chamber 104 in the cutter sleeve 76.
  • the reciprocable blade 82 snaps outwardly across the lateral portion 96 of the slot 90 (Fig. 23), thereby severing the yarn F which is immediately sucked into the aspirating conduit 69.
  • the ascending drive head 22 engages the latch disengagement lever 234 and retracts the stop bolt 221 (Figs. 5 and 16).
  • a limit switch is activated, which initiates retraction of the gathering head 41. Accordingly, the hydraulic cylinder 50 retracts and the gathering head 41 returns to its original retracted position.
  • the yarns F, F' respectively engage the grooves 240 of the guide arms 46, 46'.
  • the limit switch 142 is activated, causing the fluid ram 146 to rotate the housing 52 about the pin 54 to displace the tip 78 of the aspirator conduit 69 away from the yarn plane (Figs. 6 and 12). In so doing, it is assured that the yarns F, F' will not contact the winder during subsequent descent of the guide arms.
  • the yarn handling mechanism now rests in this position as the packages 18, 18' are replaced, either manually or automatically.
  • the yarns F, F' sucked-in through the aspirator 69, 78 are delivered to waste.
  • a restart signal is delivered to the machine, either by manual depression of a "start" button on the winder or by a computer signal in an automated system.
  • Such restart signal actuates the cable cylinder 186 to lower the carriage 174, such that the first cam follower wheel 208 leaves the first cam surface 202, thereby causing the guide arms 46, 46' to rotate about the axis of the shaft 170 and swing the filaments outwardly from the original yarn plane (see broken line position in Fig. 7).
  • the carriage 174 continues its descent until the first cam follower wheel 208 engages the second cam surface 204 and causes the guide arms 46, 46' to swing toward the winder so that the free ends of the guide arms are located below the tailing guides 29, 29' to thread the yarns F, F' into those tailing guides (Figs. 7 and 13). Further descent of the carriage 174 brings the second cam follower wheel 210 into engagement with the third cam surface 206 which produces further rotation of the free ends of the guide arms 46, 46' toward the winder 12 at a location below the standard rethreading guides of the winder (Figs. 8 and 14). As a result, the yarns F, F' are positioned to become picked-up by the standard throw-on guides 32, when the latter are swung toward the empty packages.
  • a limit switch is activated, thereby starting a timer which controls the moment at which the throw-on guides 32 are swung toward the empty packages. This time period is required in order to assure that the drive head 22 has sufficient opportunity to bring the empty packages up to final speed.
  • the actual rethreading of the yarns occurs in a conventional manner as the throw-on guides insert the yarns F, F' into the usual pinch slots in the empty packages. Accordingly, the yarns are captured by the rapidly rotating packages, thus producing tension in the yarns between the packages and the aspirator 69 of such a degree that the yarns are broken (Fig. 8).
  • the yarn handling apparatus is highly advantageous in that it is capable of convenient retrofit to existing winders without appreciable modification of the structural components of the latter.
  • the apparatus functions in a relatively simplified manner, thereby minimizing malfunction and break down.
  • the gathering head remains at rest during the actual transfer of the yarns toward the empty packages; only the guide arms need be displaced during this sequence.
  • the movements of the transfer guide arms are simplified in that the guide arms do not pass through the vertical plane containing the package axis. Rather, the guide arms remain to one side of such plane.
  • the guide arms are able to rethread the conventional transfer tail devices mounted on the winder.
  • control mechanism for the yarn handling apparatus is disposed at the anchored end of the package axle and thus is not disposed to interfere with the exchange of packages by a robot or an operator at the free end of the package axle.
  • the actual severing of the filaments is facilitated because the cutter mechanism is able to receive the yarns in the direction of reciprocation of the gathering head. This ensures that the yarns will eventually enter and be captured by the cutter slot as the gathering head travels through the yarn plane.
  • the cutter blades themselves make sharp, crisp cuts through all the filaments in each yarn because the blades are pressed together during the severing stroke, and since the cutting stroke is only initiated when a selected pressure build-up is attained to produce a "snap-like" action of the cutting stroke.
  • the pressing of the blades together renders the blades self-sharpening during movement thereof.
  • the combination of a curved cutting edge on one blade and a straight cutting edge on the other blade creates a highly efficient combination of scissors and shear-like cutting actions on the filamentary yarn.
  • the gathering head according to the present invention is ideally suited not only to an automated system, but to a hand-held aspirator as well, and greatly facilitates capturing of the filaments as well as the severing and aspirating aspects thereof. It has been used many thousands of times in the winding of polyester yarn, without a single recorded failure.
  • FIG. 24 Such a device 300 is depicted in Figures 24 to 26 in which an elongated, rigid fluid outlet tube 302 has attached thereto an elongated rigid fluid inlet tube 304.
  • the latter conducts pressurized fluid, such as air, forwardly (i.e., to the left as viewed in Fig. 24).
  • This air is delivered to the outlet tube 302 through a cross-bore 305 in a casing 306.
  • the air enters the outlet tube 302 via an apertured nozzle 308 whereby a rearward suction is created in the customary manner in a forward extension 310 of the outlet tube 302.
  • a gathering head 312 which operates under the same basic principles as the afore-described gathering head 41 (Figs. 19-22) in that it has an aspirator tip 314 and a cutter mechanism 316 disposed therebelow.
  • the cutter mechanism may be identical to that previously described, although in a manual device such as that, it might be desirable to invert the positions of the blades 82, 84 so that the stationary blade 84 is located' atop the reciprocable cutter. In this fashion, the flared portion 100 of the through-passage 96 would be disposed at the top rather than at the bottom.
  • a conduit 318 Pressurized air is supplied to the cutter mechanism via a conduit 318. That air is bled from the air inlet tube 304 via a passage 319 which cooperates with a poppet valve 320 (Fig. 26).
  • the latter is of standard design and includes a central passage 322 which communicates with the passage 319 when a spring-biased trigger 340 is actuated. At all other times, the central passage communicates the cutter with an exhaust passage 342.
  • the operator lines-up the device 300 with the yarn to be severed and then merely advances the device, knowing that the yarn will become entrained within the lateral portion 96 of the slot 90 (See Figs. 19, 20). Thereafter, the trigger 340 is activated to sever the filament, thereby causing the yarn to be aspirated to waste via the tubes 310, 302.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Replacing, Conveying, And Pick-Finding For Filamentary Materials (AREA)
  • Coiling Of Filamentary Materials In General (AREA)

Claims (9)

1. Aspirateur de fil continu du type comprenant un conduit mobile (310) de succion comportant une entrée (314) de succion et un coupeur (316) de fil continu monté sur le conduit (310) au-dessous de l'entrée (314) afin de sectionner un fil qui est ensuite tiré dans le conduit de succion (310), le coupeur comprenant des première et seconde lames (82, 84) relativement mobiles, l'une des lames (84) présentant une entaille (90) s'ouvrant dans une direction parallèle au conduit (310) de succion, caractérisé en ce que:
l'entaille (90) comprend un prolongement latéral à l'intérieur duquel le fil est pris afin d'être sectionné par les lames (82, 84) en même temps qu'il parcourt l'entrée de succion (314),
le prolongement latéral de l'entaille (90) comprend une paroi avant incurvée (98) destinée à empêcher le fil de s'échapper par une extrémité ouverte de l'entaille (90), la paroi incurvée ayant un bord vif qui coopère avec un bord vif droit (120) de l'autre lame (82) afin de sectionner le fil par une action combinée de ciseaux et de cisaillement.
2. Aspirateur de fil continu selon la revendication 1, caractérisé en outre par:
un ressort (112) destiné à déplacer la lame (82) à mouvement alternatif dans l'un de ses sens, le ressort (112) agissant contre la lame fixe (84) afin de rappeler cette dernière contre la lame à mouvement alternatif.
3. Aspirateur de fil continu selon la revendication 1, comprenant un passage d'aspiration (310) destiné à conduite la succion d'air et comprenant une première ouverture (314) tournée vers l'avant, des moyens (316) de coupe de fil disposés au-dessous de l'ouverture (314) et comportant des première (84) et seconde (82) lames (84, 82) relativement mobiles, la première lame (84) présentant une entaille (90) ayant un ouverture (90) tournée vers l'avant pour l'introduction d'un fil continu et un prolongement latéral (96) destiné à retenir le fil, la seconde lame (82) comprenant un bord de coupe (98) sur le prolongement latéral, et des moyens (112) (104, 106, 108, 110) destinés à produire un mouvement relatif entre les lames afin de faire passer les bords (98, 120) l'un sur l'autre pour sectionner le fil, tandis que ce dernier parcourt le prolongement (96).
4. Appareil de manutention automatique d'un fil continu à utiliser avec un bobinoir (12) de fil continu du type comprenant:
(a) un suport (16) d'enroulement de fil et des moyens destinés à faire tourner au moins un enroulement (18, 18') autour d'un axe du support (16) pour bobiner au moins un fil continu (F, F') avancé en continu vers le bobinoir (12).
(b) des moyens collecteurs (41) en amont de l'axe (16) de rotation desdits enroulements (18, 18'), destinés à se déplacer d'une position de repos vers le trajet d'avance du fil (F, F'), les moyens collecteur comprenant:
des moyens de coupe (42, 316) destinés à sectionner le fil lorsque les moyens collecteurs (41) sont déplacés vers le trajet d'avance du fil, et
des moyens de succion (44, 310) comprenant une entrée (70, 314) disposée à proximité immédiate des moyens (42, 316) afin de tirer en continu le fil (F, F') après qu'il a été sectionné;
(c) des moyens de transfert du fil, comprenant au moins un guide (46, 46') associé au fil (F, F') en cours de transfert, montés de façon à se déplacer par rapport aux moyens collecteurs (41) entre des positions espacées, le guide (46, 46') étant agencé de façon à entrer en contact avec le fil (F, F') après que les moyens collecteurs (41) sont revenus dans leur position de repos avec les fils sectionnés, et
(d) des moyens de déplacement (170,172,174) destinés:
à déplacer les moyens de transfert par rapport aux moyens collecteurs (41), le fil (F, F') restant en contact avec le guide (46, 46') et
à déplacer le guide (46, 46') vers l'axe (16) de l'enroulement pendant une séquence de réen- filage du fil, et caractérisé par des moyens de coupe (42, 316) qui comprennent des première et seconde lames (82, 84) relativement mobiles, l'une des lames (84) présentant une entaille (90), s'ouvrant dans une direction parallèle au conduit (310) de succion, l'entaille (90) comprenant un prolongement latéral à l'intérieur duquel le fil est retenu pour être sectionné par les lames (82, 84) pendant qu'il parcourt l'entrée de succion (314), le prolongement latéral de l'entaille (90) comprenant une paroi avant incurvée (98) destinée à empêcher le fil de sortir par un extrémité ouverte de l'entaille (90), la paroi incurvée comportant un bord vif qui coopère avec un bord vif droit (12) de l'autre lame (82) afin de sectionner le fil par une action combinée de ciseaux et de cisaillement.
5. Appareil de manipulation de fil selon la revendication 4, dans lequel les moyens de coupe (42, 316) sont disposés immédiatement au-dessous de l'entrée (70, 314) des moyens de succion (44, 310) et les moyens collecteurs (41) sont espacés verticalement de l'axe (16) de rotation de l'enroulement (18, 18').
6. Appareil de manipulation de fil selon la revendication 4 ou la revendication 5 pour le bobinage de deux fils (F, F'), dans lequel les moyens de transfert comprennent deux guides (46, 46'), chaque guide étant associé à un fil respectif.
7. Appareil de manipulation de fil selon l'une quelconque des revendications 4 à 6 incluses, dans lequel les moyens collecteurs (41) sont agencés de façon à être immobiles pendant un déplacement vertical des moyens de transfert.
8. Appareil de manipulation de fil selon l'une quelconque des revendications 4 à 7 incluses, dans lequel les moyens de coupe (42, 316) comprennent une lame mobile (82), actionnée par fluide, des moyens destinés à fournir un fluide sous pression à la lame mobile (82), pour l'entraîner par intermittence sur des courses successives de coupe.
9. Appareil de manipulation de fil selon l'une quelconque des revendications 4 à 8 incluses, dans lequel les moyens collecteurs (41) sont montés à l'extrémité d'une tige (48) à mouvement alternatif agencée de façon à exécuter un mouvement alternatif au-dessus dudit axe (16) d'enroulement et parallèlement à cet axe, la position de repos desdits moyens collecteurs (41) étant adjacente à une extrémité ancrée du support (16) d'enroulement.
EP19820302093 1981-04-28 1982-04-23 Dispositif pour couper, aspirer, et enfiler un fil en déplacement Expired EP0063932B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US25830981A 1981-04-28 1981-04-28
US258309 1981-04-28

Publications (3)

Publication Number Publication Date
EP0063932A2 EP0063932A2 (fr) 1982-11-03
EP0063932A3 EP0063932A3 (en) 1982-12-01
EP0063932B1 true EP0063932B1 (fr) 1986-05-28

Family

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EP19820302093 Expired EP0063932B1 (fr) 1981-04-28 1982-04-23 Dispositif pour couper, aspirer, et enfiler un fil en déplacement

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EP (1) EP0063932B1 (fr)
JP (1) JPH0238501B2 (fr)
BR (1) BR8202378A (fr)
CA (1) CA1179305A (fr)
DE (1) DE3271336D1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6077072A (ja) * 1983-10-03 1985-05-01 Yoshida Kogyo Kk <Ykk> ワインダ−に対する糸掛け方法およびその装置
US7460356B2 (en) 2007-03-20 2008-12-02 Avx Corporation Neutral electrolyte for a wet electrolytic capacitor
US7554792B2 (en) 2007-03-20 2009-06-30 Avx Corporation Cathode coating for a wet electrolytic capacitor
DE102021003549B4 (de) * 2021-07-10 2023-08-10 Oerlikon Textile Gmbh & Co. Kg Fadenraffvorrichtung
CN116409675A (zh) * 2021-12-31 2023-07-11 深圳市微埃智能科技有限公司 提升装置
CN117074123B (zh) * 2023-07-12 2024-03-26 自然资源部第二海洋研究所 一种全自动柱状泥样分样器
CN117003061A (zh) * 2023-09-01 2023-11-07 广东三绿科技有限公司 耗材装盘流水线

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3175290A (en) * 1962-08-22 1965-03-30 Du Pont Yarn handling apparatus
JPS5025060B1 (fr) * 1964-01-29 1975-08-20
CH512390A (de) * 1970-03-06 1971-09-15 Heberlein & Co Ag Vorrichtung zum Erfassen mindestens eines Fadens und Aufbringen desselben auf eine Aufwickelhülse
GB1536939A (en) * 1975-04-17 1978-12-29 Teijin Ltd Method and device for forming a bunch winding on a fresh bobbin at the time of a doffing and donning operation
GB1547884A (en) * 1975-08-20 1979-06-27 Nuova San Giorgio Spa Apparatus for reinserting broken yarn in an open end spinning unit

Also Published As

Publication number Publication date
EP0063932A2 (fr) 1982-11-03
JPH0238501B2 (ja) 1990-08-30
CA1179305A (fr) 1984-12-11
DE3271336D1 (en) 1986-07-03
JPS57184071A (en) 1982-11-12
BR8202378A (pt) 1983-04-05
EP0063932A3 (en) 1982-12-01

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