US3765068A - Process and apparatus for the stufferbox crimping of yarns - Google Patents

Process and apparatus for the stufferbox crimping of yarns Download PDF

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Publication number
US3765068A
US3765068A US00162066A US3765068DA US3765068A US 3765068 A US3765068 A US 3765068A US 00162066 A US00162066 A US 00162066A US 3765068D A US3765068D A US 3765068DA US 3765068 A US3765068 A US 3765068A
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Prior art keywords
yarn
crimping
chamber
crimping chamber
suction device
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Expired - Lifetime
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US00162066A
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English (en)
Inventor
P Rietjens
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Akzona Inc
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Akzona Inc
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    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
    • D02G1/12—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics using stuffer boxes
    • D02G1/125—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics using stuffer boxes including means for monitoring or controlling yarn processing

Definitions

  • ABSTRACT Process and apparatus are disclosed for threading in a yarn crimping device such as a stuffer crimper wherby discharge of yarn from the device is detained during initial threadup an amount of yarn is present in the crimping chamber to effect sufficient crimp.
  • the invention relates to a process for the stufferbox crimping of yarns, threads, or tows, in which the material to be crimped is forced with the aid of feed means into one or successive, communicating chambers of a crimping apparatus in which during normal operation a wad of crimped material is formed, and the crimped yarn is discharged at the end of the chamber(s), a signalling device being provided which responds to a supply of crimped material in the chamber(s), and that during the threading in of the crimping apparatus the crimped material may temporarily be discharged via a suction device.
  • the invention also comprises an apparatus for carrying out the above process.
  • a process of the type indicated above may be considered known from the British Patent Specification No. 1,049,953.
  • the yarn is forced against a wad or supply of yarn already crimped.
  • the stuffing chamber is partly closed by a hinged flap which is loaded by a weight whose magnitude partly determines the magnitude of the stuffing pressure in the stuffing chamber.
  • After the yarn has left the stuffing chamber it enters a connecting buffer chamber whose discharge opening is partly closed by a lightly loaded flap.
  • the discharge end of the buffer chamber and the flap are substantially transparent and on either side of the buffer chamber there are provided a light source and a light-sensitive pick-up, respectively.
  • This photoelectric measuring device forms part of a control system," known in itself, for the stufferbox crimping process.
  • This control system so operates that upon detection by the photoelectric pick-up of a sufficiently large wad of crimped material, a signal is given for increasing the rate at which the yarn is discharged from the buffer chamber. As soon as the photoelectric pick-up detects an insufficient amount of crimped material in the buffer chamber, a signal is provided for reducing the rate at which the yarn is discharged from the ing apparatus and by meansof a suction device very rapidly discharged temporarily to a collecting device. As a result of the high discharge rate, the material to be treated is pulled through'the chambers of the-crimping apparatus substantially as a straight, uncrimped thread.
  • a disadvantage to this known method of threading in consists in that part of the yarn wound on the spool is non-crimped and must be regarded as waste. Use being made of high processing speeds, for instance, of 1.000 to 2,000 meters/minute, and each machine having a large number of processing points, the resulting amount of waste is fairly considerable.
  • the invention has for its object to provide a process of the type described in the opening paragraphs which does not show the aforementioned drawback.
  • the process according to the invention is characterized in that during threading in of the crimping apparatus the signalling device that normally controls the yarn discharge rate from the buffer chamber (as described above) is temporarily coupled to the suction device.
  • the suction device is manually operated to threadin yarn material through the crimping apparatus and then, the discharge of material via the suction device is stopped until a sufficient amount of crimped material is present in the chamber(s). This may be done by using, for example, the signal from the photocell signalling device discussed above.
  • the photocell device will sense when there is insufficient yarn material in the crimping or buffer chamber (depending on the number of in-line chambers) and the signal thus produced will activate a shut-off valve on the suction device until the photocell senses a sufficient amount of yarn material in the chamber. After sufficient material has accumulated in the chamber, the suction control shut-off valve will be de-activated, and the suction device will begin drawing a crimped yarn from the chamber. In this manner, an operator may thread-in a crimping chamber and go about his other responsibilities until crimped yarn is being drawn from the crimping chamber. Upon returning to the position, the operator may simply break the yarn going into the suction device and finish threading the yarn to a windup spool, thereby eliminating the uncrimped waste usually formed on the prior art packages.
  • a particularly simple process, in which the suction device is actuated by the vacuum produced .by compressed air, is according to the invention characterized in that the signalling device is so coupled to a supply valve for compressed air from the suction device that said valve remains closed until a sufficient amount of crimped materia is present in the chamber(s).
  • the signalling device comprises a photoelectric pick-up
  • the process according to the invention iswith advantage characterized in that upon detection of a sufficiently large amount of crimped material, the photoelectric pick-up provides a signal for opening the supply valve for compressed air.
  • FIG. 1 shows an apparatus for'the spinning, drawing, stufferbox crimping, and winding of yarns.
  • FIG. 2 shows an embodiment of a stufferbox crimping apparatus on a larger scale.
  • FIG. 3 shows a cross-section along the line III-III in FIG. 2.
  • FIG. 1 a bundle of freshly spun threads 1 leaves a spinbox 2 and is transported in the direction indicated by the arrow by means of the driven feed roller 3 with idler roller 4, whichhave a peripheral speed of, for instance, 400 meters/minute.
  • the melt-spun polyamide yarn will have cooled down to a temperature of about 40 C.
  • the yarn is passedto a pair of driven draw rollers 5 and 6, which are heated at a temperature in the range of to C. and have a peripheral speed of 1,600 meters/minute,
  • the yarn is wrapped a few times both around the roller 3 and around the rollers 5 and 6.
  • the drawn and pre-heated yarn is transported over a guide roller 7 and forced into the stuffing chamber by a pair of cooperating stuffing wheels 8 and 9 which rotate in opposite directions, the stuffing chamber being provided with a flap 12 which is loaded by a weight 11.
  • the stuffing chamber After the yarn has left the stuffing chamber 10, it arrives in a buffer chamber 13 at the end of which there is provided a flap 15 which is only loaded by a light spring 14.
  • a light source 16 On one side of the buffer chamber 13 there is positioned a light source 16 and on the other side there is a schematically represented photoelectric pickup 17. As is particularly apparent from FIG.
  • the stufferbox crimper is of the open type, which implies that the walls of the stuffing chamber and the buffer chamber are substantially formed by two parallel plates 18 and 19. At the level of the light source 16 and the pickup 17, the chamber walls are transparent, so that the amount of yarn in the buffer chamber can be measured photoelectrically.
  • the winding device 22 serves to withdraw the yarn from the buffer chamber 13 by way of the guide rollers and 21, the yarn being wound on a package 23 by means of a grooved drum 24.
  • the suction device 25 is to be displaced by hand and may be attached to the machine frame.
  • the suction device 25 substantially comprises a supply line 26 for compressed air, in which line an air valve 27 is provided for starting and stopping the suction device.
  • the compressed air produces a vacuum in an aspirator type housing 28 and a tube 29, as a result of which the yarn can be sucked into the tube 29.
  • the sucked yarn and the compressed air are discharged through a tube 30 and, via a flexible tube, deposited in a known manner in a collecting vessel for waste material.
  • means 31 for temporarily conveying a signal from the photoelectric pick-up device 17 to the air valve 27.
  • the air valve 27 may then be controlled by signals from the photoelectric pick-up device.
  • the freshly spun yarn from spinbox 2 is passed, by the use of the tip of tube 29, over the feed roller 3 with idler roller 4 and over the rotating draw rollers 5 and 6, after which the yarn is passed over the guide roller 7 and between the stuffing wheels 8, 9 into the stuffing chamber 10 and the buffer chamber 13.
  • the excess yarn during this part of the threading-in is captured by the suction device 25.
  • the discharge of yarn via the suction device 25 is stopped until a sufficient amount of crimped material is present in the buffer chamber.
  • the pick-up 17 As soon as the photoelectric pick-up 17 detects a sufficient amount of crimped material in the buffer chamber, the pick-up 17 provides via the line 31 a signal for opening the air valve 27, upon which the suction device 25 is re-started. The suction device will then withdraw crimped yarn from the buffer chamber, which yarn is rapidly threaded in by passing it over the guide rollers 20 and 21 to the winding device 22.
  • Method for threading a crimping chamber in a continuous yarn process comprising the steps of:
  • Apparatus for threading a crimping chamber in a continuous yarn process comprising:
  • a yarn sensing device responsive to yarn accumulation in the crimping chamber for controlling the amount of yarn in the crimping chamber
  • Apparatus for threading a stuffer crimping device in a continuous yarn process comprising feed means for the yarn to be crimped, at least one crimping chamber, a signalling device responsive to accumulated yarn in the chambers, and a suction device operative by the signal device to stop the discharge of material to the suction device until sufficient material is present in the crimping chambers for crimping.
  • Apparatus for threading a crimping chamber from a continuous yarn supply comprising a yarn suction device movable relative to said crimping chamber for accepting yarn during the threading of the crimping chamber and means for automatically interrupting said suction device until sufficient yarn has accumulated in the crimping chamber to crimp the yarn.
  • suction device interruption means comprises a sensing device attached to the crimping chamber to determine yarn accumulation in the crimping chamber and control means operative from said sensing device for interrupting said suction device until sufficient yarn has accumulated in the crimping chamber.
  • sensing device comprises photoelectric means within the crimping chamber.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
US00162066A 1970-07-14 1971-07-13 Process and apparatus for the stufferbox crimping of yarns Expired - Lifetime US3765068A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7010429A NL7010429A (en)) 1970-07-14 1970-07-14

Publications (1)

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US3765068A true US3765068A (en) 1973-10-16

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US00162066A Expired - Lifetime US3765068A (en) 1970-07-14 1971-07-13 Process and apparatus for the stufferbox crimping of yarns

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US (1) US3765068A (en))
DE (1) DE2133764A1 (en))
FR (1) FR2101625A5 (en))
GB (1) GB1351648A (en))
NL (1) NL7010429A (en))

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4554716A (en) * 1984-03-21 1985-11-26 E. I. Du Pont De Nemours And Company Apparatus for tensioning and forwarding tow
US5056200A (en) * 1990-01-09 1991-10-15 Textured Yarn Company, Inc. Apparatus for making novel textured yarn

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1422949A (en) * 1972-05-17 1976-01-28 Heathcoat & Co Ltd Process and apparatus for the production of bulked and crimped yarn
DE3516886A1 (de) * 1985-05-10 1986-11-13 Akzo Gmbh, 5600 Wuppertal Verfahren und vorrichtung zum kraeuseln von fadenkabeln
JPH08144147A (ja) * 1994-11-14 1996-06-04 Takehara Kikai Kenkyusho:Kk 繊維巻縮装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2572138A (en) * 1951-02-07 1951-10-23 American Enka Corp Method of threading ring twisting machines
US2617603A (en) * 1952-03-03 1952-11-11 American Enka Corp Threading-in on a reel
US2704430A (en) * 1950-11-22 1955-03-22 Pneumafil Corp Control for the operation of roving frames
AT257817B (de) * 1964-01-31 1967-10-25 Onderzoekings Inst Res Stauchkräuselvorrichtung
US3526023A (en) * 1967-08-18 1970-09-01 Algemene Kunstzijde Unie Nv Apparatus for box crimping synthetic yarns

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2704430A (en) * 1950-11-22 1955-03-22 Pneumafil Corp Control for the operation of roving frames
US2572138A (en) * 1951-02-07 1951-10-23 American Enka Corp Method of threading ring twisting machines
US2617603A (en) * 1952-03-03 1952-11-11 American Enka Corp Threading-in on a reel
AT257817B (de) * 1964-01-31 1967-10-25 Onderzoekings Inst Res Stauchkräuselvorrichtung
US3526023A (en) * 1967-08-18 1970-09-01 Algemene Kunstzijde Unie Nv Apparatus for box crimping synthetic yarns

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4554716A (en) * 1984-03-21 1985-11-26 E. I. Du Pont De Nemours And Company Apparatus for tensioning and forwarding tow
US5056200A (en) * 1990-01-09 1991-10-15 Textured Yarn Company, Inc. Apparatus for making novel textured yarn

Also Published As

Publication number Publication date
FR2101625A5 (en)) 1972-03-31
DE2133764A1 (de) 1972-01-20
GB1351648A (en) 1974-05-01
NL7010429A (en)) 1971-09-27

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