US3685752A - Method and apparatus for processing a thread on a draw-spin-winding machine - Google Patents

Method and apparatus for processing a thread on a draw-spin-winding machine Download PDF

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Publication number
US3685752A
US3685752A US870522A US3685752DA US3685752A US 3685752 A US3685752 A US 3685752A US 870522 A US870522 A US 870522A US 3685752D A US3685752D A US 3685752DA US 3685752 A US3685752 A US 3685752A
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US
United States
Prior art keywords
thread
cutting means
tube
suction
cutting
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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
US870522A
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English (en)
Inventor
Armin Wirz
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.)
Maschinenfabrik Rieter AG
Sealed Motor Construction Co Ltd
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Maschinenfabrik Rieter AG
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Assigned to SEALED MOTOR CONSTRUCTION COMPANY LIMITED reassignment SEALED MOTOR CONSTRUCTION COMPANY LIMITED ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: G.K.N. GROUP SERVICES LIMITED
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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D13/00—Complete machines for producing artificial threads
    • 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
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
    • D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
    • D02J1/22—Stretching or tensioning, shrinking or relaxing, e.g. by use of overfeed and underfeed apparatus, or preventing stretch
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
    • D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
    • D02J1/22—Stretching or tensioning, shrinking or relaxing, e.g. by use of overfeed and underfeed apparatus, or preventing stretch
    • D02J1/225—Mechanical characteristics of stretching apparatus
    • 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
    • B65H2701/313—Synthetic polymer threads
    • B65H2701/3132—Synthetic polymer threads extruded from spinnerets

Definitions

  • the cutting means and suction means are arranged abovethe detection means so as to, first, draw in the thread against the suction means and to, second, sever the thread while, the free ends is then drawn into the suction means. Both the cutting means and the suction means are pneumatically activated in response to the Q detection of a disturbance in the thread path by the detecting means.
  • This invention relates to a method and apparatus for processing a thread on a spin-draw-winding machine. More particularly, this invention relates to a method and apparatus for detecting and correcting thread defects in a thread processed on a spin-draw-winding machine.
  • the invention provides a method and apparatus in which'a thread being processed in a spinthread tension after severing of the thread if a disturbance occurs in the thread path.
  • the method is incorporated into the overall spindraw-winding process in which a plurality of endless filaments emerging from a spinning cabinet are combined into a thread, drawn and wound up.
  • the method includes the step of detecting the occurrence of a disturbance in the thread path and, in response to the detection of disturbance, of drawing the thread into a predetermined position and severing the thread downstream of this position. At the same time, the thread is maintained under a tension sufficient to maintain the thread path at the prede'temrined position.
  • the thread can be drawn into the predetermined position pneumatically and in such a case can be held under the same pneumatic pressure to insure the maintenance of the thread tension. Further, the thread, after being severed, can be pneumatically separated into the individual filaments by a vortex so that the thread tension is increased considerably.
  • the apparatus of the invention includes a detection means arranged at some point in the path of the thread, such as at the drawing device or at the winding device, to be activated by a disturbance in the thread path, a thread cutting means arranged upstream of the detection means with respect to the thread path, and a suction means upstream of and in close vicinity to the cutting means for drawing in the thread.
  • the suction means is also set close to the thread path and with the cutting means is activated by the detection means.
  • the suction means is activated to draw in the thread.
  • the cutting means is then activated to sever the thread while the suction means then draws in the cut end of the thread to maintain the thread under tension.
  • the cutting means is provided with a pneumatic force accumulator to permit the delay of the cutting action with respect to the activation of the suction means as well as to allow the build up of a pressure sufficient to effect a rapid cutting action. The thread can then be rethreaded after the disturbance has been corrected and the spindraw-winding process can be restarted.
  • FIG. 1 schematically illustrates a spin-draw-winding machine utilizing the method and apparatus of the invention
  • FIG. 2 illustrates a perspective view of a cutting means according to the invention
  • FIG. 3 illustrates a cross-sectional view of a accumulator of the cutting means according to the invention
  • FIG. 4 illustrates a cross-sectional view of a suction means according to the invention
  • the machine also includes a drawing device having a pair of rotatable delivery rolls 5 and a pair of draw rolls 6 which rotate faster than the delivery rolls 5 and which draw the thread 2 at the usual drawing ratio.
  • the thread 2 is passed through a stationary thread guide 7, a traversing device
  • the time needed for building up the pressure in the v room 31 can be chosen by means of an exchangeable or 8 as is known, and a drive roll 9 and is wound up in a known manner onto a package 10.
  • the machine is further provided with a detection means 11, 12 each between the rolls of the delivery rolls 5 and draw rolls 6. Each detection means is activated in response to a lap formation on the rolls of the drawing device.
  • a detection means can also be arranged near the free thread path and can be activated by a lack of thread tension.
  • a thread cutting means 13 is disposed upstream of the delivery rolls 5 adjacent the thread path for severing of the thread 2 in response to activation of the detection means 11, 12.
  • a suction means 14 is disposed immediately upstream of the cutting means 13 closely adjacent to the thread path.
  • the cutting means 13 and suction means 14 are connected in common to a duct 15 which is supplied with compressed air from a suitable source (not shown),
  • An electromagnetic valve 16 is disposed in this duct 15 in order to control the flow of air from the duct 15 to the respective cutting means 13 and suction means 14.
  • the valve 16 is activated either via an electrical connection 15 by an impulse from either of the detection means 11, 12 or manually.
  • the cutting means 13 includes a pivotally arranged blade 17, the edge 18 of which rests on a plate 19.
  • the plate 19 contains a stationary cutting edge 20 in the form of a U-shaped recess 21 enlarged somewhat towards the inside, through which recess 21 the thread 2 runs without touching in normal operation.
  • the pivoting axis 22 of the blade 17 is arranged so that, in the cutting operation, the thread 2 is caught in the recess 21 and cannot, as in conventional cutting devices, escape to the outside, which occurs with increasing frequency as thread speeds increase.
  • the blade 17 has a slot 23 through which a projection 24 (FIG. 3) of a piston rod 25 is inserted.
  • the pivoting of the blade 17 is controlled by reciprocation of the piston rod 25 which is controlled by a piston 26 slidably arranged in a compressed air cylinder 27.
  • a hold means is provided in order to hold the blade 17 in an idle position in which thread 2 passes uninfluenced through recess 21.
  • This hold means is constituted by a groove 28 in the piston rod 25 into which balls 30 are pressed by springs 29 acting radially towards the inside form all sides so as to hold the piston rod 25 in place and thus the blade 17.
  • valve 16 (FIG. 1) opens, activated by detection means 11 or 12, compressed air is supplied via duct 15 to cylinder 27 and after a certain, if very small, lapse of time, a relatively large room 31 in the cylinder 27 is filled with air and pressure is built up there.
  • adjustable throttle valve 32 (FIG I) inserted into the supply line upstream from the cylinder 27. From the illustration, it is evident that if the room 31, acting as an air regulator, were not provided, i.e., if cylinder wall 33 were arranged in the position 34 indicated with dashdotted lines, the desired delay of the start of the piston movement would not be achieved. Also, as the pressure in the initially very small room 31 would decrease rapidly at the start of the piston movement, the speed of the cutting movement would be lower.
  • the suction means 14 includes a suction tube 35 adjacent the thread path and a diffusor tube 36 into which the inner end of the suction tube 35' merges leaving an annular gap 37.
  • Both the tubes 35, 36 are mounted in a suitable housing 48 so as to define a cylindrical room or chamber 38 which surrounds the inner end of the suction tube 35.
  • This room 38 communicates via a pair of tangentially oriented ducts 39 to a circumferential manifold 49 in the housing 48 which connects with the duct 15.
  • compressed air can be discharged into the room 38 from the air duct 15 and associated means so as to create a vortex therein as well as in the diffusor tube 36.
  • air flow cross-section areas must be chosen such that a sufficiently effective throttle point is formed which prevents a pressure drop in the supply duct 15 to the suction means 14, as sufiicient pressure would not otherwise build up in the room 31 of the cutting means 13.
  • the electromagnetic valve 16 is actuated so as to open the duct 15 to the passage of compressed air to the cutting means 13 and suction means 14.
  • a high speed air vortex is then generated at the inner end of the suction tube 35 by the air emerging tangentially from the ducts 39 and is discharged into the diffusor tube 36 while air is sucked in through the suction tube 35 according to the ejector principle.
  • the thread 2 is diverted from the straight thread path, (indicated with dash-dotted lines in FIG. 1), to or closely to the inlet opening of the suction tube 35.
  • the pressure is built up in the room 31 of the cylinder 27 so that after a short lapse of time while the thread is drawn against the tube 35, the blade 17 is activated and severs the thread 2.
  • the end is sucked through suction tube 35 before it can escape from the vicinity of the inlet opening of the suction tube 35.
  • the air vortex acting in the diffusor tube 36 separates the individual filaments 40 of the thread 2 so that the air force acting on the thread 2 and the thread tension in the suction means 14 are increased. This ensures the taking up of the thread still emerging from spinning cabinet 1 and prevents accumulation from occurring in the cabinet 1.
  • the thread suction means 41 and the cutting means 42 can alternatively be arranged after the drawing device and the detection means 44 can be arranged at the drive roll 45 of the winding device.
  • the suction means 41 and cutting means 42 must be arranged above this guide 46. I,
  • a spin-draw-winding machine having a spinning cabinet for spinning a thread, a drawing device downstream of said cabinet for drawing the thread emerging from said cabinet and a winding device for winding of the drawn thread wherein the thread follows a thread path extending from said spinning cabinet through said drawing device to said winding device;
  • At least one detection means arranged near at least one of said drawing device and said winding device for detecting disturbances in the thread moving through said predetermined thread path
  • a suction means upstream of said cutting means having a tube disposed near said thread path for drawing in the severed thread after the thread has been severed by said cutting means
  • said latter means includes a duct connected in common to said cutting means and said suction for delivering a flowof compressed air thereto for activation thereof, and a valve in said duct connected to said detection means for controlling the flow of air through said duct to said cutting means and said suction means in response to the detection of adisturbance in a thread in the thread path.
  • said cutting means includes a force accumulator connected to said duct to receive and accumulate air therefrom and to actuate said cutting means to sever a thread after a predetermined air pressure is obtained therein.
  • said cutting means includes a stationary plate having a cutting edge, a movable blade, a pneumatically activated piston for moving said blade relative to said edge, a hold means for maintaining said blade in an idle position spaced from said edge and a force accumulator for releasing said blade from said hold means to move said blade at high speed from said position towards said edge.
  • said force accumulator includes a room between said piston and said duct for regulating the air therein.
  • said suction means includes a diffusor tube, a suction tube merging into said diffusor tube to define an annular gap therewith, said suction tube having an end adjacent the thread path, a housing mounting said tubes therein to define a room surrounding the inner end of said suction tube, and means connected to said room for discharging compressed air into said room and said difiusor tube to create a vortex therein.
  • a method for processing thread comprising the steps of combining a plurality of endless filaments into a thread, drawing the thread, and subsequently winding the thread onto a package; the further steps of detectv ing the occurrence of disturbances in the thread moving through a predetermined thread path, drawing the thread into predetermined position upstream of the disturbance in response to the detection of the disturbance while maintaining tension in the thread up-

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
US870522A 1968-11-06 1969-10-21 Method and apparatus for processing a thread on a draw-spin-winding machine Expired - Lifetime US3685752A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1665968A CH517184A (de) 1968-11-06 1968-11-06 Verfahren zur Behandlung eines Fadens auf einer Spinn-Streck-Spul-Maschine und Vorrichtung zur Durchführung des Verfahrens

Publications (1)

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US3685752A true US3685752A (en) 1972-08-22

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Family Applications (1)

Application Number Title Priority Date Filing Date
US870522A Expired - Lifetime US3685752A (en) 1968-11-06 1969-10-21 Method and apparatus for processing a thread on a draw-spin-winding machine

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US (1) US3685752A (enrdf_load_html_response)
CH (1) CH517184A (enrdf_load_html_response)
FR (1) FR2022670A1 (enrdf_load_html_response)
GB (1) GB1257128A (enrdf_load_html_response)
NL (1) NL146886B (enrdf_load_html_response)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5575142A (en) * 1990-09-21 1996-11-19 Barmag Ag Method of automatically servicing winding apparatus in multi-station textile machines

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5172532U (enrdf_load_html_response) * 1975-03-06 1976-06-08
DE3410757A1 (de) * 1982-09-24 1985-09-26 Zinser Textilmaschinen Gmbh, 7333 Ebersbach Vorrichtung zum stillsetzen einzelner vorlagespulen bei betriebsstoerung an einer textilmaschine
CN105420823A (zh) * 2015-12-18 2016-03-23 江苏昊星化纤纺织有限公司 一种尼龙66生产用防飘丝纺丝箱

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2412403A (en) * 1944-07-12 1946-12-10 American Enka Corp Method and apparatus for use in the manufacture of synthetic threads
US2696036A (en) * 1951-09-14 1954-12-07 Du Pont Yarn wrap eliminator
US2990603A (en) * 1958-04-23 1961-07-04 Leesona Corp Apparatus for draw-stretching and winding yarn
US3051364A (en) * 1961-06-08 1962-08-28 Du Pont Fluid yarn-transfer device
US3066471A (en) * 1959-05-07 1962-12-04 Scragg & Sons Textile yarn package changing arrangements
CA686728A (en) * 1964-05-19 Crouzet Charles Textile handling arrangement
CH397499A (de) * 1962-11-21 1965-08-15 Schweiter Ag Maschf Vorrichtung zur Fadenlängenmessung an Kreuzspulmaschinen
US3370800A (en) * 1965-02-19 1968-02-27 Zellweger Uster Ag Apparatus for switching auxiliary work performers into operation with textile machinery
US3380676A (en) * 1964-08-05 1968-04-30 Schweiter Ag Maschf Cutting mechanism for automatic winding machines
US3438188A (en) * 1966-10-11 1969-04-15 Allied Chem Yarn defect detecting device

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA686728A (en) * 1964-05-19 Crouzet Charles Textile handling arrangement
US2412403A (en) * 1944-07-12 1946-12-10 American Enka Corp Method and apparatus for use in the manufacture of synthetic threads
US2696036A (en) * 1951-09-14 1954-12-07 Du Pont Yarn wrap eliminator
US2990603A (en) * 1958-04-23 1961-07-04 Leesona Corp Apparatus for draw-stretching and winding yarn
US3066471A (en) * 1959-05-07 1962-12-04 Scragg & Sons Textile yarn package changing arrangements
US3051364A (en) * 1961-06-08 1962-08-28 Du Pont Fluid yarn-transfer device
CH397499A (de) * 1962-11-21 1965-08-15 Schweiter Ag Maschf Vorrichtung zur Fadenlängenmessung an Kreuzspulmaschinen
US3380676A (en) * 1964-08-05 1968-04-30 Schweiter Ag Maschf Cutting mechanism for automatic winding machines
US3370800A (en) * 1965-02-19 1968-02-27 Zellweger Uster Ag Apparatus for switching auxiliary work performers into operation with textile machinery
US3438188A (en) * 1966-10-11 1969-04-15 Allied Chem Yarn defect detecting device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5575142A (en) * 1990-09-21 1996-11-19 Barmag Ag Method of automatically servicing winding apparatus in multi-station textile machines

Also Published As

Publication number Publication date
DE1952231A1 (de) 1970-06-04
NL146886B (nl) 1975-08-15
FR2022670A1 (enrdf_load_html_response) 1970-08-07
DE1952231B2 (de) 1976-08-12
NL6914238A (enrdf_load_html_response) 1970-05-11
GB1257128A (enrdf_load_html_response) 1971-12-15
CH517184A (de) 1971-12-31

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Owner name: SEALED MOTOR CONSTRUCTION COMPANY LIMITED

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:G.K.N. GROUP SERVICES LIMITED;REEL/FRAME:004148/0374

Effective date: 19830418

Owner name: SEALED MOTOR CONSTRUCTION COMPANY LIMITED

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:G.K.N. GROUP SERVICES LIMITED;REEL/FRAME:004148/0374

Effective date: 19830418