EP0463695B1 - Machine for preparing yarn packages and corresponding method - Google Patents

Machine for preparing yarn packages and corresponding method Download PDF

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Publication number
EP0463695B1
EP0463695B1 EP91201570A EP91201570A EP0463695B1 EP 0463695 B1 EP0463695 B1 EP 0463695B1 EP 91201570 A EP91201570 A EP 91201570A EP 91201570 A EP91201570 A EP 91201570A EP 0463695 B1 EP0463695 B1 EP 0463695B1
Authority
EP
European Patent Office
Prior art keywords
yarn
package
packages
winding
prearranging
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
EP91201570A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0463695A1 (en
Inventor
Roberto Badiali
Amedeo Quaia
Luciano Bertoli
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.)
Savio Macchine Tessili SpA
Original Assignee
Savio Macchine Tessili SpA
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Publication date
Application filed by Savio Macchine Tessili SpA filed Critical Savio Macchine Tessili SpA
Publication of EP0463695A1 publication Critical patent/EP0463695A1/en
Application granted granted Critical
Publication of EP0463695B1 publication Critical patent/EP0463695B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • D01H9/18—Arrangements for replacing or removing bobbins, cores, receptacles, or completed packages at paying-out or take-up stations ; Combination of spinning-winding machine for supplying bobbins, cores, receptacles, or completed packages to, or transporting from, paying-out or take-up stations ; Arrangements to prevent unwinding of roving from roving bobbins

Definitions

  • This invention relates to high-quality yarn production by the integrated spinning and winding process, in which the yarn is produced in the first stage generally in a ring spinning machine, whereas in the second stage the produced yarn is rewound to remove or at least considerably reduce its defective portions in order to obtain a product which is of good quality both in terms of its appearance and in terms of its mechanical strength.
  • the winding process is much faster than the spinning process and therefore a small number of winding stations is able to wind or rewind the yarn produced in a much higher number of spinning stations producing a large number of wound yarn packages which are then combined into a smaller number of larger-size bobbins which represent the final product of the spinning-winding machine.
  • the packages produced in the spinning station must be presented to the winding stations with a yarn end in a predetermined position, this being generally a vertical position with the yarn end inserted through the upper aperture of the tube which forms the core of the package.
  • the winding machine is thus able to automatically grasp the yarn end and commence its rewinding to form the bobbin.
  • spinning-winding machines are characterised by a large number of spinning stations of up to one thousand or more, but only a small number of winding stations of the order of some tens, between which the empty tubes recycled from the winding machine for receiving the new wound packages and the yarn-wound packages to be rewound are conveyed.
  • this conveying together with the prearranging of the packages is handled in recently designed spinning-winding machines by automatic conveyor devices of various designs which limit the work of the operators to mere supervision and intervention in the case of possible machine malfunction.
  • the winding stage generally has a higher capacity than the spinning stage to allow the winding machine to handle the yarn production without any build-up during its operation.
  • the winding machine discharges not only tubes completely empty of yarn for recycling to the spinning machine, but also a small but not negligible number of tubes not completely empty of yarn, from which the automatic winding machine is unable to take up further yarn because the end is no longer recoverable by the devices with which each station is equipped.
  • These tubes have to be selected, recovered and fed to the package arranging device in order to use up the yarn still wound on them by finding its end and then refeeding them to the the winding machine.
  • the known art comprises a large number of spinning-winding machine arrangements.
  • German patent No. 3235442 of Murata Kikai the packages and tubes are conveyed between the spinning and winding machines with the aid of disc supports provided with a tube engagement peg, the discs being placed on conveyor belts.
  • US patent No. 3941323 of Savio describes a device for preparing wound packages for rewinding, including searching for, preparing and retaining the yarn end.
  • USA patent No. 4432198 of the same proprietor describes a device for conveying packages between the two stages
  • US patent No, 4571931 of Schlafhorst describes a transfer device between the spinning and winding machines which acts as a buffer store between the two machines and feeds the packages to the winding machine when requested by the winding stations. This device also includes means for prearranging the packages.
  • a spinning-winding process according to US-A-4 571 931 provides:
  • the proposed methods include a large variety of conveyor systems, namely smooth conveyor belts on which the packages are either laid on their sides or supported by said discs, conveyor belts provided with fixed vertical pegs for engaging the tubes and packages in a vertical position, sector elevators and conveyors, and gripper devices, generally combined with each other.
  • Figure 1 is an overall view of the machine according to the invention together with a spinning and a winding machine.
  • the spinning machine 1 consists of a plurality of ring spinning stations 2, in which the feed sliver is worked to produce yarn which is collected in the form of packages 3 located in the bottom of the unit.
  • the spinning stations 2 can be disposed on one or both faces of the spinning machine to form spinning faces.
  • Each spinning face is provided with devices 4 for doffing the complete packages and replacing them with empty tubes on which the yarn is then wound to form new packages, and a device 5 for conveying said packages and said empty tubes.
  • the conveying device 5 consists of a belt conveyor driven with stepwise movement and provided with pegs 6 designed to hold in a vertical position the packages to be unloaded from the spinning machine and the empty tubes to be loaded onto it.
  • the even numbered pegs are intended to receive the product packages and the odd numbered pegs are intended to receive the empty tubes or vice versa.
  • the doffing operation consists essentially of the following procedure.
  • the doffing device 4 rises and moves its gripper members 7 over the top of the packages 3, represented by the top of the tube, and withdraws them by raising said packages from the spinning machine, moving them outwards and then lowering them onto the even numbered pegs 6 of the conveyor 5.
  • European patent application EP-A-0 290 063 of the present applicant describes gripper members for the doffing operations within a spinning machine.
  • the gripper members 7 are then released to leave the packages on the even pegs, and the doffing device is then raised through a small distance.
  • the conveyor 5 is advanced through one step so that its gripper members are now in a position corresponding with the empty tubes disposed on the odd pegs.
  • the device 4 is relowered to make contact with the top of the empty tubes and its gripper members 7 again made to operate on the empty tubes.
  • the device 4 then undergoes the reverse movement to that previously described, to mount the empty tubes in place of the complete packages which have just been unloaded from the spinning units.
  • the odd pegs are occupied by the empty tubes to be supplied to the spinning machine, and on termination of the operation the even pegs are occupied by the complete packages to be fed to the winding machine.
  • Said packages are conveyed by advancing the conveyor 5 stepwise towards the transferring unit 9 which, in a preferred but not exclusive embodiment, consists of a stepping conveyor provided with gripper members 10 and having a portal configuration, which enables equipment and persons to pass between the spinning and winding machines.
  • the transferring unit 9 which, in a preferred but not exclusive embodiment, consists of a stepping conveyor provided with gripper members 10 and having a portal configuration, which enables equipment and persons to pass between the spinning and winding machines.
  • the grippers 10 grip the middle of the packages 3.
  • the conveyor 5 and transferring unit 9 move synchronously so that each new package 3 presented by the conveyor 5 is received by an open gripper 10 which is ready to close.
  • the conveyor 5 is able to undergo a new advancement step to present a new package.
  • the control sensors used can be mechanical feelers, photoelectric cells or equivalent sensing devices.
  • the spinning machine 1 is constructed with two spinning faces and two conveyors 5, there will also be two transferring units provided.
  • the transferring unit or units 9 discharge the packages 3 into a positioning funnel 11 which feeds the device 12 for prearranging the packages for their feed to the winding machine.
  • the package conveying procedure can be implemented by firstly entirely discharging one spinning face and then the other or by alternately presenting packages from both conveyors 5 so that the positioning funnel 11 alternately receives packages from both faces one at a time.
  • the conveyor can be operated with double steps, whereas for the second method the two conveyors can be operated with single instead of double steps and staggering between the two faces the positions occupied by the complete packages and empty tubes.
  • the spinning and winding operations can be conducted independently by arranging a buffer store of packages between the two machines and supplying the feed funnel 11 of the device 12 from this store.
  • the package prearranging device 12 represents one of the most characteristic parts of the present invention and is described hereinafter in greater detail with reference to Figure 2. Its purpose is to prearrange the packages so that their yarn end is intact and free, and inserted by a predetermined length through the upper aperture of the tube which acts as the core of the package 3 fed to the winding machine. In this respect the winding machine is provided with means for taking up the yarn from this position and automatically commencing its rewinding.
  • the device 12 feeds the package carrier 13 which serves the winding machine 14.
  • the package carrier 13 consists of a conveyor in the form of a horizontally moving chain or belt carrying a series of preferably vertical or off-vertical cylindrical pockets which receive the prearranged packages from the device 12 and convey them to all the constituent winding stations 15 of the winding machine 14.
  • the package carrier 13 is also one of the most characteristic parts of the present invention and is described hereinafter with reference to Figure 3 which shows it in greater detail.
  • Each winding station 15 is provided with a multi-position loading support 16 (in Figure 3 three positions are shown by way of example, namely one for the package being wound, one for a reserve package and one for the tube to be discharged) in which the packages to be unwound during winding are placed and from which the empty tubes are removed to be recycled upstream by a conveyor 17.
  • a multi-position loading support 16 in Figure 3 three positions are shown by way of example, namely one for the package being wound, one for a reserve package and one for the tube to be discharged) in which the packages to be unwound during winding are placed and from which the empty tubes are removed to be recycled upstream by a conveyor 17.
  • the loader 16 is in the form of a rotatable support provided with slightly tapering pegs for centering the packages and tubes placed on them and for holding them in an approximately vertical position, and is driven with stepwise rotation to move into the working state the position already provided with a package to be unwound, so that as soon as one package is empty another can be immediately worked without even having to wait for the time required for reloading a new package fed by the package carrier 13.
  • the empty tubes and defective packages are expelled by a mechanism 18, consisting for example of a cam-controlled rod which removes the tubes from their pegs to discharge them onto the tube recycle conveyor 17.
  • a selector 19 for selecting empty tubes and packages still containing a residual yarn winding. The selection can be made for example by the device in accordance with U.S. patent No. 4,871,072 of SAVIO S.p.A.
  • the empty tubes are recycled to the spinning machine by the conveyor 20 whereas the packages containing a residual winding are conveyed to the collection bin 22 by the conveyor belt 21.
  • the tubes recycled to the spinning machine are fed to the vertical belt 23 which conveys them to the loading station for the spinning machine conveyor 5, whereas if they contain wound yarn residues they are discarded to be cleaned separately.
  • Figure 2 shows the device 12 for preparing the package in order to prearrange it for its subsequent rewinding.
  • the funnel 11 contains the package 3 originating from the spinning stage either directly via the transferring unit 9 or from a further conveyor which withdraws it from a buffer package store if the spinning and winding stages are not directly connected.
  • the door 31 allows the package 3 to fall into the underlying compartment 32 after a control sensor has provided a signal to the effect that this compartment is free of packages.
  • the device 12 consists of a fixed cylindrical tank comprising a circular wall 33 and a flat bottom 34, and within which a drum 35 rotates about the axis 36.
  • the drum 35 is provided with a series of compartments which rotate with it to carry the packages into a plurality of stations in which the preparation stages are carried out.
  • sensor means 37 such as photoelectric cells or mechanical sensors check whether the compartment is occupied by a package. If the compartment is free the sensors cause a new package to be loaded from the overlying funnel 11, whereas if the compartment is occupied they provide the enabling signal for the forward rotation of the compartment.
  • the drum therefore rotates to move the said compartment into position 38 in which the first preparation stage takes place, in accordance with Figure 2A.
  • the yarn end is now parallel to the package axis.
  • the drum now moves to the second station, which provides a further search for an extending yarn end in case the first operation had been unsuccessful, for example because the yarn end had not been correctly wound on the tube base.
  • the drum then moves to the third preparation station 48 ( Figure 2C).
  • the suction nozzle 49 comprising a suction slit 50 and a curved body 51 extending as far as the suction manifold, is moved up to the package 3 and draws in the yarn end.
  • the curved body 51 comprises a slit 52 along the interior of its curve so that yarn for which the yarn end has entered the manifold re-emerges to take the path 53.
  • the package 3 is then advanced to the fourth preparation station 54, while still leaving the yarn end captured in 53.
  • the yarn moves into the position shown by the dashed line and enters the lead-in 55.
  • Said lead-in comprises a yarn presence sensor 56 which notifies when the yarn end has been received.
  • a scissor cutter 58 disposed in proximity to said lead-in is operated to cut the yarn.
  • the thus released yarn end is drawn into the interior of the package tube by the effect of the suction through the nozzle 57, which is activated by a solenoid valve 59 operated when the sensor 56 enables the cutting of the yarn end.
  • the package is now prearranged for use in the winding operation.
  • the drum then advances into the fifth station 60, in which a drop 61 operated by a pneumatic piston 62 is provided and when enabled by the sensor 56 opens under the control of the underlying device 13.
  • the package 3 prearranged for the rewinding of its yarn is thus transferred to the device 13.
  • the sensor 56 does not give the enabling signal for the discharge of the package because it has not sensed yarn presence, the package is conveyed through the stations 54 and 60 without being discharged, and is moved beyond the path of the device 12.
  • the distance between the package 3 and the scissor cutter 58 must be such that a sufficient yarn end length is left for it to penetrate into the tube by a sufficient length, preferably by 2/3 of its length.
  • Any package which on the basis of the sensing operation by the sensor 56 has not been properly prepared is recirculated stepwise until it reaches the position of the compartment 32, to recommence the cycle.
  • the occupied compartment is freed in a subsequent station, for example 63, provided with a drop similar to 61 which discharges the unprepared package into a discarded package box, not shown in the figure, via a lead-in 64.
  • the device 12 operates with the loading position 32 and its five preparation stations always occupied by packages and advances one step each time the subsequent device 13 requires a package from it because it has a free position to occupy.
  • the device 12 therefore operates in line with the subsequent device 13.
  • the further available stations are used for feeding packages not completely empty of yarn to undergo preparation for rewinding, and from which the yarn end must be recovered in order to be able to recycle them to the rewinding.
  • Figure 3 shows the package carrier 13.
  • This consists of a belt 70 of vertical or slightly off-vertical axis driven by pulleys rotated by a motor not shown in the figure, and carrying a series of flared pockets 72 having a bottom aperture 73 which can be opened on command when in a position corresponding with the loaders 16 which, as stated by way of example heretofore, comprise a free peg 74 to be loaded with a new package while the adjacent peg 75 is already provided with a package being unwound, and the peg 76 carries a tube to be discharged.
  • the packages are conveyed in such a manner as to maintain the pockets 72 and at least one of the pegs of the loader 16 of each spinning station always filled with packages prearranged for winding.
  • the winding procedure is therefore over a considerable period independent of the times required for the delivery of new packages by the spinning machine, and is not affected by any build-ups in the conveying between the two stages, which work on hundreds of full packages and empty tubes per hour of operation, so allowing such build-ups to be remedied without influencing the winding stage.
  • the package loader 16 contains three or more pegs, the package can be changed in it by firstly removing the emptied tube and then replacing it with a new prearranged package, or vice versa. If the loader has only two positions the emptied tube must be firstly removed and then replaced with a new package. In both cases the other position carries the already present package into its working position without any delay.
  • the conveyor 13 is always kept moving. This movement can be slow and continuous, or can be stepwise.
  • FIG. 4 shows the pocket container 72 in greater detail.
  • Each pocket container 72 fixed to the belt 70, is provided with a base 73 which can be opened by an electromechanical release device operated by the loaders 16 each time they rotate.
  • an operating rod for the release device - of conventional type and therefore not shown in the figures - is extended so that it engages the first container 72 presented, so opening its base 73. This rod then retracts until it is again triggered.
  • the pocket 72 travels along its path normally provided with a package 3 which rests on the base 73. Detecting sensors are located along the path of the pocket 72 just prior to where it passes under the position in which the package is discharged from the position 60 of the package prearranging device 12.
  • the sensor 78 for example a magnetic sensor which detects the presence of a metal projection on the upper part of the pocket, indicates the presence of the pocket which is being moved into the position for receiving the package, and the sensor 79, for example a flexible rod, determines whether a package is already present or whether the pocket is empty.
  • the discharge command is fed to the drop 61.
  • the device 12 When the position 60 has been discharged, the device 12 is rotated through one step, so that package prearranging is resumed and another package is introduced in position 32.
  • the device 12 Until position 60 is released of its prearranged package, the device 12 is kept at rest and cannot receive further packages.
  • the pocket container 72 loaded with its package by 61, continually travels along the face of the winding machine 14 on the belt 70 until a loader 16 requests its package and causes the base 73 to open, so that the package 3 falls into the lead-in 77 and then onto the peg 74.
  • the pocket 72 continues along its path in an open configuration until it encounters an inclined surface 80 which resets the base 73 by snap-closing it. This resetting member is located prior to the sensors 78 and 79, which themselves precede the position for loading by 12.
  • the package carrier 13 preferably has a number of pockets equal to a multiple of the number of winding stations, namely two or three times, to ensure a whole number of reserve packages.
  • the remaining part of the conveying procedure is therefore in a direct line to the winding machine without the need for intermediate buffers.
  • the conveying procedure operates such that the available positions of the package carrier 13 are always kept engaged, and its request for packages extends upstream as far as the doffing device, which is therefore dependent on it, leaving aside the intrinsic capacity of the intermediate conveyor members.
  • the operations involved in the prearranging and conveying of the packages are conducted with the packages always in a substantially vertical position, so obviating any need for handling to orientate them correctly for winding.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Replacing, Conveying, And Pick-Finding For Filamentary Materials (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Winding Filamentary Materials (AREA)
EP91201570A 1990-06-29 1991-06-20 Machine for preparing yarn packages and corresponding method Expired - Lifetime EP0463695B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2081290 1990-06-29
IT02081290A IT1249026B (it) 1990-06-29 1990-06-29 Roccatrice perfezionata con preparatore di spole in linea e procedimento perfezionato di filoroccatura

Publications (2)

Publication Number Publication Date
EP0463695A1 EP0463695A1 (en) 1992-01-02
EP0463695B1 true EP0463695B1 (en) 1996-04-03

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP91201570A Expired - Lifetime EP0463695B1 (en) 1990-06-29 1991-06-20 Machine for preparing yarn packages and corresponding method

Country Status (3)

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EP (1) EP0463695B1 (enrdf_load_html_response)
DE (1) DE69118452T2 (enrdf_load_html_response)
IT (1) IT1249026B (enrdf_load_html_response)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107381232A (zh) * 2017-08-31 2017-11-24 山东华兴纺织集团有限公司 纱尾找头装置及自络找头机

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3474975A (en) * 1967-09-11 1969-10-28 Leesona Corp Bobbin handling installation
IT8183350A0 (it) * 1981-03-25 1981-03-25 Savio Spa Trasportatore di spole.
DE3341895A1 (de) * 1983-11-19 1985-05-30 W. Schlafhorst & Co, 4050 Mönchengladbach Spinn-/spul-aggregat
US4858836A (en) * 1986-12-12 1989-08-22 Murata Kikai Kabushiki Kaisha Yarn end finding device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PROFS *

Also Published As

Publication number Publication date
DE69118452D1 (de) 1996-05-09
DE69118452T2 (de) 1996-09-26
IT1249026B (it) 1995-02-11
EP0463695A1 (en) 1992-01-02
IT9020812A1 (it) 1991-12-29
IT9020812A0 (enrdf_load_html_response) 1990-06-29

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