US3738017A - Yarn heating apparatus - Google Patents

Yarn heating apparatus Download PDF

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Publication number
US3738017A
US3738017A US00147855A US3738017DA US3738017A US 3738017 A US3738017 A US 3738017A US 00147855 A US00147855 A US 00147855A US 3738017D A US3738017D A US 3738017DA US 3738017 A US3738017 A US 3738017A
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US
United States
Prior art keywords
tube
walls
heating
wall thickness
kcal
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
US00147855A
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English (en)
Inventor
J Rascle
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.)
Heberlein and Co AG
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Heberlein and Co AG
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Filing date
Publication date
Application filed by Heberlein and Co AG filed Critical Heberlein and Co AG
Application granted granted Critical
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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
    • D01D10/00—Physical treatment of artificial filaments or the like during manufacture, i.e. during a continuous production process before the filaments have been collected
    • D01D10/04—Supporting filaments or the like during their treatment
    • D01D10/0436—Supporting filaments or the like during their treatment while in continuous movement
    • D01D10/0481—Supporting filaments or the like during their treatment while in continuous movement the filaments passing through a tube

Definitions

  • This invention relates to apparatus of heating continuously advancing lengths for yarn consisting at least partially of thermoplastic material. More particularly, the invention relates to a tubular heater constructed to afford a very nearly uniform temperature throughout its length.
  • a known apparatus of this type consists of an enclosure containing a heated gaseous medium and in which a number of steel tubes through which the yarns pass in axial direction are arranged in axial parallelism, the tubes being heated by the gaseous medium.
  • the object of the invention therefore, consists in an apparatus for heating continuously moving textile yarns consisting at least partially of synthetic thermoplastic material by means of heating tubes arranged in an enclosure containing a heated fluid medium, the yarns passing in axial direction through the tubes.
  • the apparatus of the invention is characterized in that the walls of the tubes consist of a material of a heat conductivity of at least 70 kcal d T C, where d distance in meters, T time in hours and C temperature in celsius degrees, that the interior diameter of the tubes is not over 4 mm and that the wall thickness is at least 2.5 mm.
  • the walls of the tubes may consist of aluminum, the interior diameter of the tubes may be 2.5 3.5 mm, and the thickness of the tube walls between 3 and 5 mm.
  • the outer faces of the tube walls may be formed with ribs in order to improve heat transfer from the fluid medium to the tube wall.
  • FIG. 1 is an elevational sectional view of a known heating tube
  • FIG. 2 is a view similar to that of FIG. 1, but illustrating a heating tube according to the present invention
  • FIGS. 3 and 4 are graphic representations of the temperatureconditions in the heating tubes of FIGS. 1 and 2, respectively;
  • FIGS. 5 and 6 are sectional views illustrating the tube with longitudinal ribs.
  • a steel tube 1 (conductivity 43 kcal d T C) ofa wall thickness of 1 mm and an interior diameter of 10 mm is shown.
  • the steel tube 1 is situated in a closed enclosure of squared shape and is sealed in aligned openings 2, 3 of the bottom 4 and of the cover 5, respectively, of the enclosure, the bottom and cover being partially shown.
  • the enclosure contains air heated approximately to 230C, which transfers its heat to the steel tube 1.
  • the temperature curve T of the interior face of the tube 1 is graphically shown extending over the whole of its length.
  • the temperature curve T has a maximum of 225C somewhat above the middle of the tube and diminishes rather sharply towards the tube ends, i.e., to approximately C towards the bottom of the enclosure, and to approximately 200C towards the cover of the enclosure.
  • This particular temperature curve is caused by the accumulation of hot air in the upper part of the enclosure, and by a certain chimney effect in the relatively wide steel tube.
  • an optimal heat transfer is obtained only over a part of the tube length so that, at higher yarn speeds, under certain circumstances, an insufficient heating effect on the yarn is obtained. It will also be appreciated that with such apparatus, the speed of the advancing yarn is often limited.
  • FIG. 2 instead of a usual steel tube, a heating tube 10 of the present invention is shown.
  • This tube is also arranged in openings 2, 3 of the bottom 4 and of the cover 5, respectively, of an enclosure containing air of approximately 230C.
  • the tube 10 consists of aluminum (heat conductivity kcal d T C) and has wall thickness of 4.5 mm and an interior diameter of 3 mm.
  • the temperature curve T on the inner wall of the tube 10 is graphically shown over its whole length. It will be seen that the temperature curve T is flatter than the one of FIG. 3, and the temperature is reduced to approximately 200C at both tube ends.
  • FIGS. 5 and 6 illustrate a series of longitudinal ribs 11 formed integral with the tube in order to facilitate heat transfer from the fluid medium to the tube wall.
  • the tube of the present invention permits higher yarn speeds without terial, besides aluminum, also other metals with a heat conductivity of at least 70 kcal d T C may be used, such as copper with a conductivity of 320 kcal d T C or brass which, depending on the type of alloy, includes conductivities of between 70 and 100 kcal d T C.
  • the present invention overcomes the difficulties noted in respect of presently known heating tubes, and permits more uniform heating and generally faster advance of the yarn, and thus greater overall production speeds.
  • Apparatus for heating continuously advancing textile yarns consisting at least partially of synthetic thermoplastic material by means of a tube sealed at its ends in an enclosure containing a heated fluid medium, through which tube the yarn passes in axial direction characterized in that the tube walls consist of a material with a conductivity of at least 70 kcal c T C, that the interiordiameter of the tube is not more than 4 mm and the tube wall thickness is at least 2.5 mm.
  • Apparatus according to claim 1 characterized in that the interior tube diameter is 2.5 3.5 mm and the wall thickness is 3 5 mm.
  • Apparatus according to claim 1 characterized in that the outer faces of the tube is are provided with ribs.
  • a heating tube of the class described comprising an elongate body having walls consisting of a material with a conductivity of at least kcal d T C, a wall thickness of at least 2.5 mm, and an interior diameter of not more than 4 mm.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Woven Fabrics (AREA)
  • Treatment Of Fiber Materials (AREA)
US00147855A 1971-01-06 1971-05-28 Yarn heating apparatus Expired - Lifetime US3738017A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH10271A CH525981A (de) 1971-01-06 1971-01-06 Vorrichtung zum Erhitzen von kontinuierlich fortbewegten, mindestens teilweise aus synthetischem thermoplastischem Material bestehenden Textilgarnen

Publications (1)

Publication Number Publication Date
US3738017A true US3738017A (en) 1973-06-12

Family

ID=4179301

Family Applications (1)

Application Number Title Priority Date Filing Date
US00147855A Expired - Lifetime US3738017A (en) 1971-01-06 1971-05-28 Yarn heating apparatus

Country Status (6)

Country Link
US (1) US3738017A (it)
CH (1) CH525981A (it)
DE (1) DE2165207A1 (it)
FR (1) FR2121075A5 (it)
GB (1) GB1340631A (it)
IT (1) IT948128B (it)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3813863A (en) * 1971-10-29 1974-06-04 Heberlein & Co Ag Apparatus and process for continuously texturing and post-setting yarns
US4076075A (en) * 1975-07-10 1978-02-28 Asa S.A. Yarn heating device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2820280A (en) * 1956-11-20 1958-01-21 Stevens & Co Inc J P Yarn heating system
US2823292A (en) * 1956-07-31 1958-02-11 Heberlein Patent Corp Device for the continuous heat treatment of textile yarns
US2896060A (en) * 1956-06-11 1959-07-21 Heberlein Patent Corp Apparatus for heat setting yarn
US2900783A (en) * 1955-10-28 1959-08-25 North American Rayon Corp Yarn crimping apparatus
US3002729A (en) * 1955-06-20 1961-10-03 Brown Fintube Co Tube with external fins

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3002729A (en) * 1955-06-20 1961-10-03 Brown Fintube Co Tube with external fins
US2900783A (en) * 1955-10-28 1959-08-25 North American Rayon Corp Yarn crimping apparatus
US2896060A (en) * 1956-06-11 1959-07-21 Heberlein Patent Corp Apparatus for heat setting yarn
US2823292A (en) * 1956-07-31 1958-02-11 Heberlein Patent Corp Device for the continuous heat treatment of textile yarns
US2820280A (en) * 1956-11-20 1958-01-21 Stevens & Co Inc J P Yarn heating system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3813863A (en) * 1971-10-29 1974-06-04 Heberlein & Co Ag Apparatus and process for continuously texturing and post-setting yarns
US4076075A (en) * 1975-07-10 1978-02-28 Asa S.A. Yarn heating device

Also Published As

Publication number Publication date
GB1340631A (en) 1973-12-12
IT948128B (it) 1973-05-30
CH525981A (de) 1972-07-31
FR2121075A5 (it) 1972-08-18
DE2165207A1 (de) 1972-07-27

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