US3533146A - Heating system for yarns and threads - Google Patents

Heating system for yarns and threads Download PDF

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Publication number
US3533146A
US3533146A US756170A US3533146DA US3533146A US 3533146 A US3533146 A US 3533146A US 756170 A US756170 A US 756170A US 3533146D A US3533146D A US 3533146DA US 3533146 A US3533146 A US 3533146A
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US
United States
Prior art keywords
yarns
heating
contact body
thermal resistance
heat
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
US756170A
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English (en)
Inventor
Josef Raschle
Wilhelm Todt
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 Patent Corp
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Heberlein Patent Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Heberlein Patent Corp filed Critical Heberlein Patent Corp
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Publication of US3533146A publication Critical patent/US3533146A/en
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    • 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
    • D02J13/003—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 stationary surface, e.g. a plate
    • 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

Definitions

  • This invention relates to an apparatus for heating continuously advancing yarns, threads and the like, and more particularly to electrical resistance heating apparatus adapted to heat the advancing material in sequential steps with a minimum of heat loss.
  • Apparatus are known for the heat treatment of continuously advancing textile yarns, threads, ply-yarns and the like, hereinafter yarns, according to which the yarn is temporarily brought into a plastic state by heating.
  • a plastification which is followed by resolidification by cooling, mechanical deformations which have been imparted to the yarns, such as twist or spiral deformations or the like, can be permanently fixed.
  • contact plates such as metal plates or rails in which separate contact surfaces are heated to different temperatures for preheating and main heating.
  • the present invention is intended to obviate the difficulties and disadvantages of known yarn heating apparatus of the class described, and to contribute apparatus wherein the close temperature control of the yarns necessary to production of a uniform product of high quality is achieved, while permitting the yarns to be advanced at the high speeds employed in modern yarn processing machinery.
  • the present inventive concept is directed to an apparatus for heat treatment of continuously axially advancing yarns comprising an elongated contact body, heating means cooperatively associated with the contact body to maintain different zones of that body at predetermined temperatures, respectively, and thermal resistance means interposed between the zones.
  • the heating means be of the electrical resistance type, and that it be embedded within the contact body which latter may be cast around the heating means in order to achieve good heat transfer therebetween.
  • the heating means comprise at least two heating elements so arranged within the contact body that each has a terminal end adjacent that of the other so that the respective temperaure zones are also adjacent one another.
  • the thermal resistance is positioned at the adjacent ends of the heating means.
  • This thermal resistance may take the form of a hollow extending through the contact body, preferably at right angles to the direction of movement of the yarns; or it may be a core of low thermal conductivity positioned within the body or extending through it; or the thermal resistance may constitute a reduction in the cross-sectional area of the heat conductive contact body; or it may constitute a greater spacing between the ends of the heating means.
  • the contact body may be enlarged laterally at selected locations along its length, preferably at least one such enlargement occurring in each temperature zone, these enlargements being bored for reception of temperature control devices such as thermocouples or the like.
  • FIG. 1 is a side elevational view of apparatus according to the present invention
  • FIG. 2 is a perspective view of a position of the contact body
  • FIG. 3 is a front elevational view of a position of the contact body
  • FIG. 4 is a cross-sectional view taken along the lines 44 of FIG. 3;
  • FIG. 5 is a cross-sectional view taken along the lines 55 of FIG. 1;
  • FIG. 6 is a cross-sectional view taken along the lines 66 of FIG. 1;
  • FIG. 7 is a cross-sectional view illustrating the present apparatus in an appropriate environment.
  • FIG. 1 there is shown a contact body 10 formed with a convex contact surface 11.
  • Heating elements 12 and 14 in the form of heating bars heatable by heating coils (not shown), are embedded in the body 10 and terminate adjacent one another at a location at which a thermal resistance 15, about which more will later be said, is positioned.
  • the contact surface 11 is formed with two grooves 16, although any convenient number may be used, so that one or more yarns may be treated.
  • These grooves may be coated with a suitable material such as Teflon to prevent the deposit thereon of compositions which may have been applied to the yarns, see U.S. patent application Ser. No. 607,434; or the grooves may be hard chromed to facilitate cleaning.
  • the yarn proceeds in a downward direction, as viewed, and generally the element 12 will be set at a higher temperature than the element 14 so that the preheating effect will approximate a thermal shock to the yarn while the heater 14 will serve to effect the main heat treatment of the yarn.
  • the thermal resistance 15 is positioned therebetween.
  • the thermal resistance may comprise a hollow configuration of rectangular cross-section extending through the contact body at a right angle to the direction of yarn movement. This construction maintains the heat conducting cross-section of the contact body as small as possible consistent with necessary strength, and prevents interruption of heat flowing to the yarns.
  • Several such hollows may of course be used, or a cast-in core of low thermal conductivity such as foamed glass asbestos or ceramic material may be used, the contact body may be necked down in cross section, or one of the elements 12 or 14 may be shortened.
  • supporting pins 17 and 19 consisting preferably of a material of a low heat conductivity coefiicient such as V4A grade steel are cast into the contact body to serve as mounts for that body in respect of an enclosure 20 to be discussed later.
  • the pin 17 may be connected to the contact body adjacent the thermal resistance 15 to assist in heat dissipation; and the pin 19 is connected to the body near its opposite end.
  • the enclosure 20 may comprise a series of layers 21 of insulating material such as asbestos and mineral fiber mats 22 which overextend the contact face of the body and are themselves enclosed in a thin metal casing 24; and the entire assembly is held together by a series of bolts (not shown) which pass through holes 25 (FIG. 1).
  • a series of bolts (not shown) which pass through holes 25 (FIG. 1).
  • One of these bolt holes may be located adjacent the thermal resistance 15 further to reduce the heat conducting cross-section of the contact body between the heating elements.
  • the pin 19 be connected to the enclosure 20 or to the contact body by a spring (not shown) to allow for expansion and contraction of the contact body.
  • the contact body is formed with lateral protrusions 26 which are contoured as truncated pyramids decreasing in crosssection in a direction outwardly of the body 10.
  • Each such protrusion is bored as at 27 and 29 (FIGS. 3 and 4) for reception of temperature sensing and control devices (not shown).
  • the present invention contributes a contact body for heat treating yams which body is of unitary construction and provides uniform controlled heating through two heating zones with a controlled temperature gradient therebetween.
  • a relatively short contact body made according to the present invention can treat yarns advancing at the high speeds achieved in modern yarn twisting or other treating machines.
  • Apparatus for heat treatment of continuously axially advancing yarns comprising, an elongated slightly convex heat conductive contact body having a continuous yarn contact surface, separate heating means encased within said contact body to maintain different zones of said yarn contact surface, each at predetermined temperatures, respectively, and thermal resistance means in said contact body adjacent the ends of said heating means.
  • heating means are at least two electrical heating elements and said thermal resistance means comprises means forming at least one hollow in said contact body.
  • said heating means are at least two heating elements encased within said contact body and said thermal resistance comprises a core of low thermal conductivity positioned in said contact body at the adjacent ends of said heating means.
  • thermo resistance means comprises a reduction of cross-sectional area of the heat conductive contact body.
  • thermo resistance means comprises a reduction of the length of at least one of the heating means.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
US756170A 1967-08-31 1968-08-29 Heating system for yarns and threads Expired - Lifetime US3533146A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1220967A CH464433A (de) 1967-08-31 1967-08-31 Vorrichtung zur Wärmebehandlung von kontinuierlich durchlaufenden fadenförmigen Gebilden, insbesondere Textilgarnen, mittels widerstandsbeheiztem Kontaktkörper

Publications (1)

Publication Number Publication Date
US3533146A true US3533146A (en) 1970-10-13

Family

ID=4380909

Family Applications (1)

Application Number Title Priority Date Filing Date
US756170A Expired - Lifetime US3533146A (en) 1967-08-31 1968-08-29 Heating system for yarns and threads

Country Status (5)

Country Link
US (1) US3533146A (de)
CH (1) CH464433A (de)
DE (1) DE1785110A1 (de)
FR (1) FR1575212A (de)
GB (1) GB1215029A (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3796036A (en) * 1970-11-21 1974-03-12 Scragg & Sons Method of processing yarn
US3813863A (en) * 1971-10-29 1974-06-04 Heberlein & Co Ag Apparatus and process for continuously texturing and post-setting yarns
US4641504A (en) * 1984-06-12 1987-02-10 Barmag Barmer Maschinenfabrik Ag Yarn heating chamber
GB2263333A (en) * 1992-01-15 1993-07-21 Rieter Scragg Ltd Heating yarns

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2864229A (en) * 1957-06-05 1958-12-16 Universal Winding Co Apparatus for thermally processing yarns
US2993260A (en) * 1958-02-20 1961-07-25 American Enka Corp Differentially heated draw pin
US3050819A (en) * 1958-06-03 1962-08-28 Celanese Corp Manufacture of bulked fiber
US3063124A (en) * 1959-01-05 1962-11-13 Hilleary William Textile heating apparatus
US3077724A (en) * 1957-09-09 1963-02-19 Leesona Corp Apparatus for processing yarns
CA718152A (en) * 1965-09-21 Coen Alberto Device and process for stretching polyolefin fibers and products thus obtained

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA718152A (en) * 1965-09-21 Coen Alberto Device and process for stretching polyolefin fibers and products thus obtained
US2864229A (en) * 1957-06-05 1958-12-16 Universal Winding Co Apparatus for thermally processing yarns
US3077724A (en) * 1957-09-09 1963-02-19 Leesona Corp Apparatus for processing yarns
US2993260A (en) * 1958-02-20 1961-07-25 American Enka Corp Differentially heated draw pin
US3050819A (en) * 1958-06-03 1962-08-28 Celanese Corp Manufacture of bulked fiber
US3063124A (en) * 1959-01-05 1962-11-13 Hilleary William Textile heating apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3796036A (en) * 1970-11-21 1974-03-12 Scragg & Sons Method of processing yarn
US3813863A (en) * 1971-10-29 1974-06-04 Heberlein & Co Ag Apparatus and process for continuously texturing and post-setting yarns
US4641504A (en) * 1984-06-12 1987-02-10 Barmag Barmer Maschinenfabrik Ag Yarn heating chamber
GB2263333A (en) * 1992-01-15 1993-07-21 Rieter Scragg Ltd Heating yarns

Also Published As

Publication number Publication date
GB1215029A (en) 1970-12-09
DE1785110A1 (de) 1972-01-13
FR1575212A (de) 1969-07-18
CH464433A (de) 1968-10-31

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