US3632947A - Draw roll and temperature gauge for draw-twisting, draw-winding and spin-draw-winding machines - Google Patents

Draw roll and temperature gauge for draw-twisting, draw-winding and spin-draw-winding machines Download PDF

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Publication number
US3632947A
US3632947A US874544A US3632947DA US3632947A US 3632947 A US3632947 A US 3632947A US 874544 A US874544 A US 874544A US 3632947D A US3632947D A US 3632947DA US 3632947 A US3632947 A US 3632947A
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United States
Prior art keywords
draw roll
gauge
draw
combination
set forth
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Expired - Lifetime
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US874544A
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English (en)
Inventor
Felix Graf
Armin Wirz
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Maschinenfabrik Rieter AG
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Maschinenfabrik Rieter AG
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Classifications

    • 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
    • D02J13/00—Heating or cooling the yarn, thread, cord, rope, or the like, not specific to any one of the processes provided for in this subclass
    • D02J13/005—Heating or cooling the yarn, thread, cord, rope, or the like, not specific to any one of the processes provided for in this subclass by contact with at least one rotating roll
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
    • H05B6/14—Tools, e.g. nozzles, rollers, calenders
    • H05B6/145—Heated rollers

Definitions

  • the draw roll is provided with a stationary temperature gauge positioned in slightly spaced relation to the inside surface of the draw roll.
  • the temperature gauge is elongated along the middle region of the draw roll while the gap between the gauge and draw roll corresponds to the thickness of the air boundary layer which permits the most direct heat transfer. The gauge thus has a short response timelag.
  • This invention relates to a draw roll and temperature gauge for draw-twisting, draw-winding and spin-draw-winding machines.
  • the temperature gauge has frequently been mounted in the heating device inside the roll in order to control the temperature of the heating device.
  • the temperature of the heating device has been considerably higher than the actual roll temperature due to reasons of the heat transfer across the airgap necessarily present between the heating device and the rotating draw roll.
  • a resistance heating device has a very inert reaction and that the drop in temperature between the draw roll circumferential periphery and the heater depends substantially on the load.
  • the temperature gauge has also been arranged in the rotating draw roll wall. This arrangement has been possible if induction or resistance heating have been used. However, while the temperature gauge has thus been capable of being arranged at the most suitable location so that the true roll temperature can be measured there correctly, it has been a disadvantage of this arrangement that the measured temperature must be transmitted, as by a signal, from the rotating roll to a stationary control device. This has required that such transmitting devices as collector brushes, mercury, inductive noncontacting, etc. devices be used for this purpose. In order to avoid the difliculties involved in the transmission of signals, the heater and the control device also can be accommodated in the rotating system.
  • the temperature profile of an operating draw roll varies in the axial direction, the maximum usually being found approximately near the middle of the draw roll. It is thus possible to influence the distribution of the heating in an axial direction within certain limits by design measures in order to achieve a somewhat flatter temperature distribution. This influence, however, at best can ensure a certain temperature distribution only for a certain operating condition determined by rotational speed and the heat transfer to the material processed. Under changed load conditions, but otherwise correct control, the temperature profile curve along the draw roll thus will pivot around the location of the temperature gauge,
  • the temperature will be maintained at the measuring point but not at adjacent places. An array of different temperature profile curves results, intersecting at the measuring point.
  • the latter solution mentioned above implies that at the point where the cold thread is placed upon the roll in the vicinity of the back roll end, should the temperature tend to drop at that point, additional heat energy would be applied in order to maintain the temperature. The temperature would then increase at the middle zone and at the front end of the draw roll as the thread arriving there is already heated. The temperature thus increases just at the very place where it should be kept constant, namely near the point where the thread is transferred into the drawing zone.
  • the invention provides a draw roll of a draw-twisting, draw-winding or spin-draw-winding machine with a temperature gauge which is stationarily mounted with respect to the draw roll and which measures the temperature of the heated roll without contact.
  • the gauge is disposed to face the inside cylindrical wall surface of the draw roll and is fixedly mounted to leave a small airgap between the wall surface and the gauge.
  • the gauge is of flat shape and is disposed in the middle region of the draw roll.
  • the gauge is isolated against heat transmission from the induction-heating device.
  • the gauge can be foil shaped and mounted in an insulated manner on the induction-heating device while in another embodiment the gauge can be mounted on a holder and disposed in spaced relation to the induction-heating device as well as the draw roll. In this latter embodiment, the holder can be fixed into the heating device to facilitate mounting of the temperature gauge.
  • the temperature gauge can be shaped as a narrow rodlike strip while extending axially of the draw roll.
  • FIG. 1 illustrates a longitudinal cross-sectional view of a draw roll utilizing a temperature gauge according to the invention
  • FIG. 2 illustrates a longitudinal cross-sectional view of a modification according to the invention
  • FIG. 3 graphically illustrates a series of temperature profile curves along a draw roll
  • FIG. 4 illustrates a fragmentary view of a further modification according to the invention.
  • a draw roll 1 is threaded to a drive shaft 3 which is supported in gear housing 2.
  • a heating device 4 is supported, or carried, on a holder 5 and is rigidly connected with the gear housing 2 in a stationary manner.
  • the heating device 4 consists of a magnetic conductive cylindrical core 6 having lateral flanges 7, 8 protruding radially outwardly into close vicinity to the cylindrical inside surface 9 of the draw roll wall 10.
  • an induction spool 11 surrounds the core 6 as is known.
  • a flat very thin temperature gauge 12 in the shape of an area thermometer is placed onto the spool 11 approximately at the middle of the draw roll wall 10 facing the inside surface 9.
  • the clearance between the temperature gauge 12 and the inside draw roll wall surface 9 is of 0.3 to 1 mm., compared to a draw roll diameter of at least 75 mm., the temperature gauge 12 also being of substantial axial length.
  • the airgap of 0.3 to 1 mm. advantageously corresponds about to the thickness of the air boundary layer which permits the most direct heat transfer at the nominal speed of the draw roll 1.
  • the gauge 12 is further spaced from the induction spool 11 by a foil 13 which insulates electrically as well as against heat transfer.
  • This foil 13 should be heat resistant and saturated with insulating lacquers and should be mechanically sufficiently resistant for protecting of the outermost wraps of the spool 11.
  • Materials meeting these requirements are films of Papton-polymide or Nomex papers can also be considered, both registered trademarks of the DuPont Company.
  • the relatively long axial dimension and the extreme flatness of the gauge 12 is apt to ensure fast heat transfer from the inside surface 9 of the draw roll wall 10 to the gauge 12 which permits short response timelag.
  • the gauge may also, if wanted, be of considerable width along the cylindrical inside surface 9.
  • the temperature gauge 12 is further connected, as is known, for example, electronically, to a suitable control unit R which can be used to emit a control signal in response to the measured temperature for control of the heating device 4. Since such is well known further description is not deemed to be necessary.
  • the temperature gauge 14 can also be mounted onto a gauge holder 14' of annular U-shaped section or profile.
  • one leg of the U-shaped holder 14' is fastened by means of the exterior wraps 16 of the induction spool 17 to the spool while the other leg mounts the temperature gauge 14.
  • the temperature gauge 14' is thus mounted with a minimum clearance towards the draw roll inside surface as above as well as with a considerably larger airgap between the temperature gauge 14' and the spool 17. This latter airgap serves to provide heat insulation between the gauge 14' and spool 17 and must be chosen sufficiently large so that the temperature gauge 14' is influenced only by the draw roll wall.
  • a temperature profile is plotted as it results under different operating conditions if a thin draw roll wall is used as desirable for low inertia, the temperature gauge being arranged in the middle region, i.e., arranged as indicated in FIGS. 1 and 2.
  • Curve a (solid line) indicates the roll surface temperature profile of the roll at standstill and without a filament or thread thereon. As no heat is drained off unevenly by ventilation or otherwise to the surrounding room, the profile curve is substantially horizontal.
  • Curve 1; (dashed line) shows the temperature profile of the rotating roll without heat transfer to a filament or thread not yet placed onto the roll. The heat drain from the roll ends to the surrounding air is clearly demonstrated by the drop in temperature at the front and back end of the roll surface.
  • the temperature gauge arrangement according to the invention is much more advantageous than, e.g., measuring of the temperature at the points where the filament or thread meets or leaves the draw roll, i.e., at the back or front ends respectively, as in the prior art.
  • thermometers such as resistance thermometers made e.g., from metal or platinum which are designed induction free can be used or foil thermometers of a type known as such can be used.
  • the temperature gauge 18 can also be shaped as a narrow rodlike strip extending in axial direction and can be placed onto a holder 20 which again is tied in by wraps 19 to an induction spool.
  • the clearance towards the draw roll inside wall surface is very small and the clearance towards the wraps 19 located below is considerable as described above with respect to FIG. 2.
  • a temperature gauge disposed inside said draw roll in spaced facing relation to said cylindrical wall for measuring the temperature of said heated draw roll without contacting said draw roll, said gauge being in stationary relation to said draw roll and being spaced from said draw roll wall by an airgap in the range of approximately 1/250 to l/75 of the diameter of said draw roll.
  • said heating device includes a plurality of windings and which further comprises a holder having one leg secured in said windings and another leg supporting said gauge thereon.
  • an induction-heating device disposed inside said draw roll in stationary relation thereto for heating said draw roll, said heating device being spaced from said draw roll wall to define an annular airgap therebetween; a temperature gauge disposed inside said draw roll within saidannular airgap in spaced facing relation to said cylindrical wall for measuring the temperature of said heated draw roll without contacting said draw roll, said gauge being in stationary relation to said draw roll and being located wholly within the middle region of said draw roll wall; and means mounting said temperature gauge in said airgap.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Control Of Temperature (AREA)
  • Winding, Rewinding, Material Storage Devices (AREA)
US874544A 1968-11-06 1969-11-06 Draw roll and temperature gauge for draw-twisting, draw-winding and spin-draw-winding machines Expired - Lifetime US3632947A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1665868A CH498959A (de) 1968-11-06 1968-11-06 Streckrolle für Streckzwirn-, Streckspul- und Spinn-Streck-Spul-Maschinen

Publications (1)

Publication Number Publication Date
US3632947A true US3632947A (en) 1972-01-04

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ID=4419140

Family Applications (1)

Application Number Title Priority Date Filing Date
US874544A Expired - Lifetime US3632947A (en) 1968-11-06 1969-11-06 Draw roll and temperature gauge for draw-twisting, draw-winding and spin-draw-winding machines

Country Status (6)

Country Link
US (1) US3632947A (enrdf_load_stackoverflow)
CH (1) CH498959A (enrdf_load_stackoverflow)
DE (1) DE1955938A1 (enrdf_load_stackoverflow)
FR (1) FR2022671A1 (enrdf_load_stackoverflow)
GB (1) GB1268914A (enrdf_load_stackoverflow)
NL (1) NL6916248A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3761666A (en) * 1972-10-02 1973-09-25 Rieter Ag Maschf Heated drawroll for draw-twisting, draw-winding and spin-draw-winding machines
CN1074795C (zh) * 1992-10-01 2001-11-14 巴马格股份公司 用于导向和传送纱线的导线辊

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19513951C2 (de) * 1995-04-12 2002-04-11 Zinser Textilmaschinen Gmbh Verfahren für das Überwachen einer temperaturgeregelten Heizvorrichtung
DE59804164D1 (de) * 1997-01-20 2002-06-27 Barmag Barmer Maschf Galette zum Fördern, Führen und Erhitzen eines laufenden synthetischen Fadens

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3211893A (en) * 1962-02-19 1965-10-12 Ici Ltd Temperature controlled electrically heated roller
US3412229A (en) * 1966-10-20 1968-11-19 Cameron Brown Capital Corp Electric heating means
US3414711A (en) * 1965-03-22 1968-12-03 Crylor Heating roller assembly
US3435171A (en) * 1965-12-03 1969-03-25 Barmag Barmer Maschf Heated galette
US3500019A (en) * 1968-01-18 1970-03-10 Coltron Ind Apparatus for developing temperature indicative signals from stationary or rotating heaters or drums and further for developing control signals from the temperature

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3211893A (en) * 1962-02-19 1965-10-12 Ici Ltd Temperature controlled electrically heated roller
US3414711A (en) * 1965-03-22 1968-12-03 Crylor Heating roller assembly
US3435171A (en) * 1965-12-03 1969-03-25 Barmag Barmer Maschf Heated galette
US3412229A (en) * 1966-10-20 1968-11-19 Cameron Brown Capital Corp Electric heating means
US3500019A (en) * 1968-01-18 1970-03-10 Coltron Ind Apparatus for developing temperature indicative signals from stationary or rotating heaters or drums and further for developing control signals from the temperature

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3761666A (en) * 1972-10-02 1973-09-25 Rieter Ag Maschf Heated drawroll for draw-twisting, draw-winding and spin-draw-winding machines
CN1074795C (zh) * 1992-10-01 2001-11-14 巴马格股份公司 用于导向和传送纱线的导线辊
JP3258017B2 (ja) 1992-10-01 2002-02-18 バルマーク アクチエンゲゼルシヤフト 糸を案内及び搬送するためのゴデット

Also Published As

Publication number Publication date
FR2022671A1 (enrdf_load_stackoverflow) 1970-08-07
DE1955938A1 (de) 1970-06-11
CH498959A (de) 1970-11-15
NL6916248A (enrdf_load_stackoverflow) 1970-05-11
GB1268914A (en) 1972-03-29

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