DE1410360A1 - Method and device for the heat treatment of continuous yarns - Google Patents

Description

PATENT LAWYERS
DR.-ING. H. FINOKE DIPL.-ING. H. BOHR DIPL.-ING. S. STAEGER

Long-distance call, »26 6OiO

S MUNICH 5, MOIIerstraBe 31

April 24, 1958

H 17141 Dr, P / F Caae Bo 188/197/200

Description of the patent application of

British Nylon Spinners Limited, Pontypool, Monmouthshire

(England)

concerning:

"Method and device for the heat treatment of continuous yarn "

UK filing priorities

dated April 25, 1957, September 11, 1957, December 10, 1957

and 8, April 1958 are used *

The invention relates to a method and a device for the heat treatment of unwinding yarns and, in particular, if not exclusively, such a treatment in troubled heat. The term "yarn" is used in the description and the claims in the sense that it denotes simple or diverse structures and strands, regardless of whether they are

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ply or doubled and the same whether they are in the form of individual ends or warp fabrics, such as "Bo Rsifeneord fabric, are" included "

It is necessary to subject a running gain or several such yarns to a heat treatment, ZoB ₀ during drawing under tension or during crimping processes, such as those based on the deformation of the synthetic yarns by twisting or warming the yarns condition practice :: ■ an edge based ο the effectiveness of the heater can in Hiasicht & iv £ productivity of the procedure in the decisive: factor be as spatial reasons ± e HeIavorrIchtang often d is not more than a few feet l & ng may be, and thereby the speed , with which the yarn or the yarns can be sent through the healing device in such a way that the heat treatment is confused, limited

There are different types of heating devices for development of synthetic yarns such as NEN iylongar-! ... bekivnnt, some on heat conduction and convection heat of which are based-on-Wiii iüsestrahlung tmil some to the heat from the Hel ^ alaraent to the yarn to transfer ο One of the simpler & a fhwmsn eiiior with \ t Wär-jrss · conduction based device is elna crowned, heated plate,

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at which the yarn over a suitable distance reached ge * in contact? however, this device has the disadvantage that the heat acts on only one side of the yarn, the average yarn temperature always having to be lower than the surface temperature of the piafete at which the threads of the yarn which come into contact with the plate melt or deteriorate be "would there are, for each respective yarn has a clearly defined maximum temperature above which iaan can not work safely and the only way :, to increase the effectiveness of the device is that mmi increases the length of Bepübrungostrecke of the yarn, which however, * as has already been noted, usually for spatial reasons it is not possible ο A simple form of an on; Radiation-based device consists of an air-filled metal tube "through the center of which the yarn runs, the walls of the tube being secured by electrical heating coils which are laid down." Advantages insofar as all sides of the yarn can be heated to the same extent to the same extent, and furthermore insofar as the temperature of the heating elements can be increased well above the Sehmel temperature of the yarn at high yarn speeds without the yarn is impaired »

BATH ORIGINAL

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Every heating appliance is required that it is? 'Yarn' warmed up to the desired temperature and kept at this temperature for so long that the purpose of the treatment, ZoBo the Forrafestixs & chen of the yarn, if it is a yarn such as nylon, which is permanently in by the action of Marina The structure that it has assumed at the time of the heat treatment can be determined. Which temperament and which tent should be present in each case depends on the type of treatment, the type of yarn and its diameter. nnfl the type of Heizver ¹ "direction, but in each case there is c-Ine period of time (and one .entsprechende path), while the one-filing or all parts of each successive GarnlSnge that passes through or engages with this contact, a rose to the desired temperature or “Glc-IchgeWlehtetemperatmr ^1” .

The subject of the present invention is a suitable device and a device with the aid of which the time and the distance during the successive yarn lengths are heated to the same temperature in relation to the time or distance previously used can be that the yarn for a given length 'a & r heating device can be processed at higher linear speeds o

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Another object of the invention is a heating curve along a number of hot gosies, in which the Tetu ~ are used in jets temperature distribution over the larger part of the tier zone is practical is even.

The invention thus relates to a method sur heat treatment wan running yarn, "for example, Pol ^ he & ataethyXenadipariiid ,, during crimping, S ₀ B ₀ means false-twisting ^ - and, Fiacierens the Kräuseltange when pulling the thread over a Eanfte or the like" .. which thereby is marked * that the yarn running off is exposed to a temperature which considerably exceeds the stiffness treatment ^: as long as the temperature of the yarn has risen to the standard temperature and that the yarn dureh heating the zone "dureh ¹ wel © hey it pulled, is ^ au.? the Staaaardbehand = ·: * is kept treatment temperature, for example at Polyhexamefehylenadipamid to about 250 ⁰ C to the bis.260 © rforäerliche heat treatment ,, which as a whole;. takes a maximum of half a second, the effect is »· ■ · ^:

To further explain the invention, Ifend, the beige · =. Drawings attached a suitable door layout; to match with the species Their to ^ ending described in the drawings 1st.

Figo 1 is a longitudinal section through this device, along de: *

CG of Fig. = 2 or 3,

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Flg. 2 a section along the line AA in Figl. 1 and 3 show a section along the line BB from FIG.

The device consists essentially of a heating jacket 1 of right-angled cross-section, which is approximately 60 cm long, and through the central space two yarns 3 and 5 are passed through the jacket in the direction from top to bottom. After the yarns run at full speed have submitted, which they have placed in the jacket in the working position, and swar with the help of a closure part 7, which is shown in Fig. 1, and which carries yarn guides 9 and 11 and 13 and 15 at its upper and lower ends . As indicated by the dashed and solid lines, part 7 can occupy two positions, the part can be moved laterally so that the yarns can be brought into the working position and out of working position in the jacket through a longitudinal slot 17, as it is because of the high temperature of the device is not appropriate * to insert the yarns before they move at operating speed. The jacket consists of an aluminum shell 19, which encloses two separate continuous, thermally insulated heating zones 21 and 23 , of which the former (the preheating zone 21) has a considerably higher temperature than the latter (the equilibrium zone 23)

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thermally isolated from the envelope 19 by solid insulating material 25 and both ends of the jacket are thermally isolated from the atmosphere by means of blocks of solid insulating material 2f and 2 $ . The two zones are in turn thermally insulated from each other by an air gap 31 of danger 3 oaa thickness between the metal end plates of the two heating zones «

As shown in FIGS. 1 and 2, the part of the device which encloses the preheating zone 21 contains an interconnected double J-shaped electrical heating element 33, each leg of which is soldered to a brass block 35 of O-shaped, horizontal cross-section. The elements contain an electrical resistance wire, which is embedded in refractory insulating material inside a tube made of stainless steel and adjusted so that a treatment temperature of HeB, 460 ° is generated. The yarns 3 and 5 run within the centrally located, air-filled space, which consists of the preheating zone 21, between the legs of the element 33 and are caused by radiation and also by the radiation inside. hot air heated “As can be seen from Fig. 5, is the thread slit 1? beveled inward to an inner width of about 1.6 mm, and the part 7 is in fact shaped to fit tightly into the outer part of the slot so that the thermal insulation of this side of the jacket vex · =

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is complete when the yarns are in working position within the sheath. The inlet to the narrow part of the slot is limited by two solid blocks of insulating material 39 and 41. The slot is also in the end blocks 27, as at 37 in FIG. 2 can be seen, and in the end block 29 hidden. det. Preferably there is between the outside of the blocks 39 and 4l and the inside of the part 7, four meters. the latter is in the closed position. air gap of about 3 mm, so that the effect on the temperature of the yarn caraners inside the heating device, when part 7 is removed from the outer part of the slot, is not too pronounced and thus the temperature when the yarns are inserted quickly and directly on the Work temperature rises. '

As shown in FIGS. 1 and 3 , the part of the device which encloses the equilibrium fur zone 23 has two parallel "Ie metal elements 43 and 45" which are approximately 6 μm thick and each an electrical resistance wire which is laid in a refractory insulating material , and are delimited by brass plates 47, 49 or 51 and 53 on both rarities. These elements are coordinated in such a way that a treatment temperature of, for example, 260 ° is generated ο The yarns 3 and 5 run in the air-filled chamber, from which the equilibrium heating zone consists, between the plates 49 and 51 * which are at a distance of

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about 4.5 η from each other, through "they were brought through the inwardly marked slot IT ia working position within the jacket". The yarns are vmu by radiation from the brass plates 49 and 51 . The slit is heated by the hot air between them. With the help of blocks of solid insulating material 55 and 57, the slot is made to 1.6 inches. ο concentrated on the side that is farthest, Vora Schiltberg 2, the Hessingplatten ^ 9 'and 51 with the aid of a brass strip 59 are verbundenο

Focusing on compliance with uniform; Temperature conditions within each zone it is considered to be extremely important that heat losses as _a result of heat distribution as a result of heat convection through good thermal insulation and through effective distribution of heat within each zone . ■ minimum seat sat down; will. The thermal. Insulation depends on the width of the thread slit 17 and on the insulating effect of the direction 7, which is supposed to close the slit, especially the camouflages ... see in working position. · -_ ■■ -.

As those skilled in the art can easily understand, the heat loss is due to Convection Bicht s © can be disadvantageous when using the heating device horizontal aagebraaiit becomes "as if it is fixed vertically, since the former case extends over the vertical diameter, des.

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Cross section of the heating device, deh. at right angles zuai path of the yarn a Temper & tur & bfall adjusts, during the Terapur & turabfall in Riclit- ^ ng of the yarn is present in the latter case, in the former case the temperature remains in the heater, along the path of the yarn substantially constant, Sm latter case niehto. The temperature difference between the upper and lower end of a vertically mounted heater having a thread - "slot of 8 mm width and no Yersühlußteil £ Ur this slit can be up to 50j6, d" h "ate temperature at the bottom of the heater is 50 $ deeper than the desired constant temperature. If this is the case, it goes without saying that the required heat treatment, such as setting the twist in a yarn, cannot be carried out effectively, if at all.

Effective thermal insulation of the space containing the heating elements is also required in the case of vertically arranged heating devices because the convection effect from the surrounding atmosphere outside the healing device would be transferred to the heating elements themselves, and thus .eln-Teinj> er & tur ~ abfall is obtained along the yarn path =.

Accordingly, the thread slit of the Heizvorriehtuog only have a very small width and the heating elements

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Rauoi must be limited so that the passage of heat from the external parts of the heating device which are in contact with the surrounding atmosphere is practically prevented. _e

The heating elements are preferably outside the safe zone *. "Between. see who the ö & rn is running, also: ün. closely spaced »

If, as shown, two of the several fibers are seen at the same time through the heating device, it is reasonable to insert them into the heating device and hold them there in such a way that the yarns are within the plane of the gap between the cells. L & eiehg © wieht§heizeXement0n-voneimmd £ r are separated by & lne r very as a fleeting j ^ $ agitation- the Girme -fflit. prevent the surfaces of the elements.

Furthermore, the temperature of a summer heating device is kept at an almost uniform value along the path of the yarn across the zone , and for this reason the special change in the heating elements over your "s" entire length or a part of the same with massi ¥ era washery material, such as. ζ-.Ba brass in pom v ^ a blocks, are in heat-resistant contact, this heat-conducting material is designed so that. it 'the said Heiseleiaante few surrounds. is in contact with these, as is the case with respect to the illustrated device

ORIGINAL BATHROOM

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- 12
already described

The massive thermally conductive material ensures "that the © heat is passed on quickly in the longitudinal direction of the heater * and when such a heater is arranged vertically becomes, the effect of this is ongoing; Heat input through Heat conduction is effected to all part of each zone of the heating device, sufficient enough to keep the effect lasting Loss of heat due to the heat cenvection, 'which along the Garnrämiri the heating device is directed upwards * against ssu works"

Of course, the shape depends on the ß-afüsiveni · thermally conductive -Materials of the size and shape -the electric Heiseleraen-. te, which are used in connection with it. o The elements can either be built into the thermally conductive material or, as shown, in heat-conducting contact with the surface this'Materials arranged or attached, ϊη a vertically arranged heater kaiif- man to adjust the temperature The lower part of the heating device or a zone of the heating device can be increased to the desired temperature better, produce the electrical heating elements in such a way that their heating effect is achieved by adding further forest wires to the lower part Part is reinforced, or you design the blessente yourself

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Welse j that., Η this: feil ausSv, z3.; I wamse is delivered «, ZoBe the elements are shaped like in the device shown or, if elements are used in the form of a snake, the snakes can be used There is a narrower distance between the floor and the ground »In such cases fcam üq be sufficient> if d & .§ massive heat-conducting materia '. ύρι part of the hot element,. where the heating effect is increased, elns-ihlxassfc or in correspondence with these.

Wurde- As already stated above., Heizvorriehttin »can gen of the type described in methods ZXM {Cräuseln- of f © ligand <Sa, rnen by setting an R &>. Seh3Wirßufig, the 'Q & rn is granted, suitable aogeii ^(.iBcI" 5 are, in the reference of the German PatentaniKeldiiiig Ki% B 41 066, among other things, such a% it is described, in the case of a rotating double tube with S ₀ B = a Kautschulcausk.ieid -sng "bsw-" a chew "sohiskisu ^ er eineas CJsrn bzvio yarns, which are passed through the tube and get into contact with the lining on one side of the same, a false twist; given and the following one *" andsr @ Sf / irnten parts of SSEM & dtirsh a Heizvorrlch fcmig, wa out wefdea ,. the present i jimimg fesfess-aiegon, the © rfiiiöü "gsgemäße to-rrichtung actual beseailars well suited rushed such © Zwirnussg get such crimps ^.. - erfahrsia festsiulegen * 'As föl for the use of a derai-tig © n ^ or ^ ieht-t ing 'be

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the following executed fc:

Versatile poljhe3 £ asaethylen-aäipimislä - =; | a: r ⁱⁿ . Of 100 den, was melted by a double tube, as described in the above mentioned "Isuäshen patent application", vm cause a false twist in the yarn, and the ν.; νί · π tm finally heated in the twisted state; in that e »e.ureh sine © rfindun necessary yorriehtung was seized«, Untej? In the conditions of the yarn given to the yarn, the roz 'left dsnier & aftl in the device was about 150 and its liiisare Gescfc ;;? occurring contraction J6 m / Mliio when a & s Qarn was wound up at a speed of 11 ^ m / min, Ee.i the applied form of the device Mirde die ere & e Zors, which was about 10 cm long, by means of an electric «! ·.! Ml of the-heated to st.sMi.dsdr'iahtes' 680® (this eats the Teit3per @ tm ^v .. the thermocouple indicates that in the air in the Mifcte. 2one to zux- ■ Temper & turkonstang left wirdo The aweite zone - 33 * 8 am. Length was heated to 250. The crimped © S-arn so fixed with the help of the device described was comparable in terms of its quality to old yarn, the usiter-similar conditions, but using a $) em lasgeii ellipfcl- = see heating reflector with a tempering door of. "560 ° - walked;., this healing device has a comparable total energy = requirement.

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14103ου

In a 2-zone heating device of the type described, which was used in a similar process for false-twist crimping of multifaceted yarns made of polyhexamethylene adipamide of denier 60 or 70, the temperatures of the two zones of the heating device were 460 or 20 ° and the Yarns were wound on at 116 m / min * (bsv? _O 113 m / min "for yarns of denier TO)" The two zones were 19 "7 era or" 55.6 era long ""

Although the device described above causes the yarn to be fixed in shape in a dry atmosphere, steam can of course also be injected into one or both zones so that the tightening takes place in a humid atmosphere the atmosphere inside the on "direction from another inert gas and not air or steam consist _o Further, the section does not necessarily have to be kastenähnlieh but he · can also be designed in circular or elliptical of Torrichtung ^

Claim

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Claims (2)

Claim: Process for the heat treatment of unwinding yarns, for example = wise made of Polyhe & amethylene adipamide, when crimping, ZoB, means Wrong twisting and flxing of the crimp when pulling the Thread over an edge or the like «,, characterized in that the yarn running off as it passes through a heating mantle at a temperature considerably higher than the standard treatment temperature Temperature is exposed until the temperature of the cooking nes has risen to the standard treatment temperature and that the yarn by heating the zone through which it is drawn is kept at the standard treatment temperature, for example in the case of polyhexamethylene adipamide at about 250 to 260 ° S, until the required heat treatment, which takes a total of no more than half a second, is effected " BADORIQINAL Documents. (Art. 7 § lA.s. 2 No. 1 S. * '· Jn ·., .Vid "rungsges.v. 1 8098 0 1/0 U0