DE2049518A1 - Apparatus for drawing yarns - Google Patents

Description

Priority: 10 * 1CUI969 - UK

The iirf j next £ relates to a device for drawing thread yarns made from a synthetic material thermoplastic organic polymer,

Many types of devices and ancestors are known with which synthetic thermoplastic yarns can be oriented by stretching Most of these devices have disadvantages such as complexity, limited stretching speed or uneven stretching.

According to the apparatus for KrCindun ^ ~ Ver will now stretch of synthetic organic thermoplastic Paden camouflage forward /: ^r eachlaf; s, v / hich the following parts aufweistt

OBK31NAI

a bath * valcheu contains hot liquid. ^>; whether or not a 'vaucUtng of the bath a ücih'ritz provided in * ,, uüt sim · «in tar clün Fliiöigkoltsr.plegel em Iv corner; oineo feot-sn Mv-tmiijstift ,, cior von dor Wlussigkeitsoborfiuviijo π im in λ b? ri; o '; o au ./.'■<· v / «-] s [: ti ^ c' ν iif -» der : m rl sr Wane ο ine ε o'joron Ra νια- .; dcrj Bad π auguendet istj and sine KinrioLtun ^ fir (JiLe iiindurchi'ührurjg a yarn through the slit in dit; rilisai ^ .keit and over dou Brerasstif '<:.

An important advantage of the original device; is darin- "that they have been very compact construction kami and still effectively Verstreckkräfte thermal iinergie and is transmitted to friction of a yarn, and that even at very high Garngeschwindigkeitens f5o the device can easily adapted to a Vorsteckeinrichtung a so-called" spin "Verstreck machine ¹ 'where melt spinning and drawing are combined in a single machine and a very high yarn speed is necessary in the drawing process.

To improve the compactness of the device, the wall of the bath have several slits, a yarn being introduced into the bath liquid through each slit * These slits are made as tight as possible, to prevent leakage of fluid, and they extend from the desolate edge of the Bads to well below the liquid level to make a yarn lightly inserted into the open upper end of the slot and darcn the Liquid can be drawn to the bottom of the slot, the may be slightly enlarged to allow for excessive contact of the yarn with the slit edges. I am more preferred The slot thus has the appearance of an elongated inverted keyhole. “It is desirable to further protect the running yarn by inserting a small smooth insert of, for example, ceramic material into the lower end of a slot '3set2t' If the slot dimensions are as small as possible are held, then - especially at high

η ο ο 4 τ t ΛΛκ- η BAD 0I ⁹ UGINAL

Yarn Speeds - found that very little of that Bathroom content escapes due to the fact that the Liquid with. the yarn is withdrawn into the bath. Of the The liquid level in the bath is kept essentially constant, and?, V? Ar he.1 for example by means of a simple overflow device.

As already indicated, the device according to the invention can be conveniently attached to an existing stretching machine, where it replaces at least some of those parts ( Yarn temperature, friction and / or tension »The device for passing a yarn through the bath can be formed by the supply and extraction parts of a stretching machine, which usually has pairs of rollers, the first feeding a yarn positively to the bath and the second that The difference in speed between the feed and take-off rollers - for the sake of simplicity, the latter are often referred to as stretching rollers "- gives the force which causes a yarn to be drawn. But the full tension is only applied to that Point or in the areas of contact of a yarn with a brake pin ore ielt and between -r due to the frictional effect. The liquid bath thus serves to preheat the yarn to the drawing temperature, with essentially no drawing occurring until the yarn runs over the brake pin. Accordingly, the bath temperature is selected such that 13 rJas yarn is brought to a temperature at which it will be drawn evenly when it is held under full tension. The conditions of temperature and voltage zui ¹ achieving a uniform stretching are interrelated and can be regulated, namely in.erster line by appropriate adjustment of yarn speed, the bath temperature and the Geschwlndigkeitsunterschieds the stretching and feed rollers (this difference is referred to as the Stretching ratio) and to a lesser extent by the length

109817/20 5 9

goo ';: ε ..; ΜΤ.-νο ^ ί3 clu.ro)? ti ie bttd: QÜ3f: n.f; l; <-. ri t uι, ■ i die BucM ug dor h'o.i liuiißg- and oj.januii'.ngr.sunraupjrj iun Jl '/ smnfrbift ■

The riüßej.fjleeitßbao vc; rlaeßeüdfc yarn leads something üRüßsi / j; · ■ Ircji Uni; eich, and ^ b is bovcrEUusst: .. the yarn to cjner Hoh-ir.Ut · WiDhtungawechsel κνά waves of I'.eriü.irun, '-; and. leaving π.es? romi33t3fi; p au ve: r'nn.'t <'infüGn. _:! . to produce ^ .entrifugnJ kräfi-e, wolehe einofi part η he voexsch'uoai ^ s ^ β α iil <rk p.it abrjc; ^{iilüudn.:.: '<n} w.'ird It further bevorHUßtj, a! «'I.ibrurig .hinterlislb doo .Bref.Ms iitlftRH Tor j? UBC3hGn. _; To make a further change in the gain direction and to reduce the amount of liquidity . For the sake of simplicity, the liquid bath and the part or the depth _x . which cause the change of direction in the redistributed yarn, must be completely enclosed around the bottom. that with niocirißtjren Garngi; Bohwindi {; keiten zu \ 7c.: "xg 7 Xii" p.1, · .. '· keit durali rlri.e Zr nt rlfij.'. ra] forces away from the yarn v / rlrd and 'IaI .; oiv V7eitorea Trocknou notig scjin ksmi ,. Besides, it is usually he ■ wishes. üf \ & vorrnrv'oekte. ¹ yarn ku wüi-og nimbly an odor to a crystallization 5Jbermo: r: br.ierun /] η 5 to cause let) and thereby A'in Gchrumpfung d (r "f μ n ~ in ^ ^ iaciifol encien TriXtilprosesöo ':. ·' zv. ty α ν The V /; Jrnie'ioh,?. n < ^! I ung is not effective until the

FlUflivLftlreit removes ννι; να '? Π iat. and accordingly, one of the preferred coils is the use of the device according to the invention that τ? Badflüsi3j.ß!; R; it leads with nicji, over a, Hu.llc-j or between a couple of roles _f which are heated withinl2 <^ h- or by an or hit. ·; to π space to bring about the last drying and f, e £ eber.ierjf, -iIId also cause a thermofixing au · The pre-stretched yarn is finally wound into a yarn winder in the usual way ... .The presence of a small!. 'Tight liquid at the beginning of the.; poor treatment can be useful if it improves the initial heat transfer _:

—— BAD ORIGtNAL

. ■ yy ι; ./üxtarat ³ yurts:!. ' dοχ 'Yerr / ending dar erfindungsgeriulileii Vor vli-huuoz zum Voratree'ioti e.ineB Fa.lengarus; v? oboi äa: s ".ülssig-I .jii-ib .- ^. i eia lidhaad" 1 u "ir; i: iiiitbei contains _ _t '' Π .'-, .-. Vi-. eifl '. ... ■ LUrLt- · '<Ir !; eil: i.ai that Ικκ ^ ^ ^ i.eiahirörrai s application C it IHttdls, ιλ "el awar \ riühenoüahTo hui high Vorst ^ eok ^ e ^ ^ ohwindi. k! ::! ten ..

.You; Sn: u> dung is bite through d:?. E ftexcihiiiin ^ or, ii closer er

Lines in the drawings;

Fig ^ 1 is a general view of a Verstrackvorrichtun ^ for ßefaaadlung of two yarns; and

j? igi 2 a schoiaatisohiBi partially cut arrangement for the supply of yarn to a spreading oil device and for the following treatment ,

i? ig. _; 1, a bath 1 has two narrow slits 2 formed in a vertical wall 3 "with the slits starting at the top, running downwards and near the bottom of the bath in an enlargement *; end «On the wall dos Bads 1 _? the wall 3 opposite liögt ₅ two blocks 6 are attached, the brake pins a short distance above the upper one. Carry ϋ-χίΐΐΐ of the wall 5 * The Bremco pins 7 are preferably attached in a detachable manner * Treatment liquid is fed to the bath through a tube 8 in the bottom and runs along the upper edge of the wall 5 over "which vorfjugowaiiJb -; twa" 9 niodrigör than d: ie o'of> r ^ * i edges t ¹ sr- other Bauwänäe is, Ki n> ?. more G-ai'n. Guide 9, which preferably consists of a smooth korami-like guide or a brewing pen. kana _? is arranged laterally crazy over the pins 7 _; so daf3 a sharp irtohtungsändorung the movement üüo yarn 10 at ilen pins takes place-j The guide 9 is preferably arranged that the above _s running yarn undergoes a further change in direction ;; before it expires

According to Fig * 2 int a l> ad 1, v / i α ü3 in Vi.r 1 erliiutavf; *; ■; '";>; ■■■ XBi; ^ which: :): ibor only has a single ochlitu 2,: ui an external Deh ^{.: R} .'l tu · 11 included ... um ßadspritraer» o . ^ · retain much as possible ^ the entire device is arranged in a Verstreckvcrriohtung that a Zuführroi.ls with a;.?.?. ugeordneben idler roller ¹ 13, ·, a Verstrückrollem few H _1, which in a erhitzton envelope 15 is located, and has an additional pair of take-off rollers 16 _.:

In operation, yarn 10 is withdrawn from a supply (not shown) by feed rollers 12 whereupon it passes into container 11j through a slot 2 in bath 1 and through the heated liquid in the bath, heating it to the drawing temperature . The yarn 10, which leaves the bath liquid cylinder, runs over a brake pin 7 where the tension is increased and the stretching takes place. goes, whereupon the yarn runs over the yarn guide 9 and around the stretching rollers 14 in a housing 15 not parallel, drawn apart by the yarn running over them in successive turns and. is effectively dried; v before it exits the housing 15 and then led to Abaugsrollon 16 / ird _e Optionally can be heated 16, the Eallen to the yarn an additional '' / ärme'be ■■ -handlung to unterwerfen_ These rollers can with the same iJmfao ^ ügeseh speed like the Kollen 14 or with a smaller circumferential speed "if a relaxation of the yarn should take place = run =. The Gaim leaving the rolls 16 is wound up into aintvi yarn package by a winding device (not shown) *

In the above Ausführu.nrsform Oines rectangular Kastenc been shown üp.b Bar] 1 in the form., Eiese shape can be easily made of sheet metal

BADORlGtNAL

" ⁷ " 20A9518

^ -i'.f.ll produced v / earth, but this final rmiß uioht unt cl? .ewe! Porn? have ,, It can be any other Kuejcl nc ··: K: B-. a cylindrical .PoSa. be used*

fU 'Αν I ■ ^! -i ^ oi ^ ker'- can do anything :! Be liquid, do not use the yarn in a detrimental way, and do not use it in a detrimental way. Water is generally a very suitable aqueous solution or dispersion of a lubricant _for an antistatic By means of or another fiber treatment (31un; ₃ 'oil material can be used in place of "you water", bath liquid can be heated in the _bath? r "; s supply are circulated" whose temperature is kept at a given value,

.Kp can use thread from the most available synthetic oT ^ atiiDchsn polymeric materials v / elohe by stretching should be oriented «in the provision according to the invention verstri.-ol: .t to be-; Examples of such materials are PoIy - ιίΰΧΘΓ ;: ν;? .. o s ..- Β, polyethylene terephthalate * and polyamides ^ like

and poly- ( £ capr-olactain) _t -

the following examples illustrate the invention?

Examples 1 --3

A unYerntreckt.es Polyäthylenterephthalatgarn of 30 filaments and having a total of 570 is the inclined en as in I ¹ ₀ 1 Xg the "accompanying Zeiehnun ISTJ introduced into a liquid" having a 1 $ strength (Gev / layer) solution of a endabgeschlos contains Senen / ithylenoxidpolymer "lubricant which is maintained at a Ternpevatur 85 ⁰ O _c the yarn path through ale 1 n" k haträgt 5 cm .. When leaving the bath runs d ^ .c ar.ii'in yarn brake pin made of sintered alumina “Which has a diameter of 3 mm”. The deflection angle is a total of 135 ° _3. Before leaving the casing 11, it runs

109817/2059

ORIGINAL

■ ■ 8

α arm noc.'j over another Yühiuna under ei nor Kichi; uü. '~ s change ^tr oi) 90 ° Llacij dam loading the envelope 11 γ-νlau! τ the yarn ü'Dor a RoIJenpaar. which is in! container 1 '.: be tj.niünt, rtfvr nijf oin ₍ :. IV aperster of 155 ⁰ C, in which residual moisture is removed and a certain amount of refinement; the yarn is made passed through the bath at speeds of 2440 - 3050 in / rain under a Yar draw ratio of 3? 79; 1 "ISn v / ircl a uniformly shaped yarn with 150 denier and a Rg: j". ·. Strength before · 4 _r 5 ß / öen obtained ^ the uniformity of the application of the lubricant is very high. it decreases with an increase in the drawing speed yet _s ists as shown in the sequence

Example 1 2 3

Drawing speed ₉ m / min 2440 2745 3050 amount of lubricant by weight, _e - # 0.21 _0? 16 C _f 14 Coefficient of variation of sliding 11.4 5 _f 3 7.-5

by means of j. %

For comparison, the coefficient of variation of the lubricants is application, if it is carried out with the help of a slowly rotating wheel? that in a bath of a lubricant solution immersed and over which the yarn is guided »approximately 25; »- ■ This method of applying an aperture is Commonly known and commonly used in manufacturing used by synthetic fibers

An undrawn polyhexaraethylene adiamide yarn with 26 threads and a total denier of 530 denier is drawn as in the previous example at a speed of 3050 m / min - with all other conditions being the same. A uniformly drawn yarn with an average l'itor of 137 denier is obtained (Coefficient of variation of the titer of 0.74? £), a tensile strength of 4 _; · 95 g / denier and an elongation at break of 25 # obtained u

109817/2059 BAD OR. _G1N At ~

Claims (1)

P ate η ta ti ν, ρ r U che r \ J Vtu '<' tohtu »i; j; sum stretching of synthetic organic ^ thermoplastischeη thread yarns, characterized * that it has the following parts! A bath for receiving a liquid, a slot in one wall of the bath being present which extends below the liquid level; a fixed brake pin spaced from the liquid surface and positioned on or near an upper edge of the bath; and means for passing a yarn through the slot into the liquid and over the brake pin. ο Device according to claim 1, characterized in that the Bad J5Vio.i or mshr has slots in a wall « 5 - »Device according to claim 1 or 2 _y, characterized in that a ceramic insert is provided at the lower end of a jjeclea slot through which the yarn runs _o 4c device according to one of claims 1 to 3? as a result «» indicates that the bath contains a hot liquid "* 5 * Device according to claim 4, characterized in that the Liquid Wassor is » 6β device according to claim 5, characterized in that the Liquid means a solution or dispersion of a lubricant, an anti-static agent, or other fiber treatment material istο "{., Device according to claim A-. Characterized- that 109817/2059 it has a device; through which a yarn after the passage is prompted to change direction sharply at least once ο 8 * Door direction according to claim 7 _5, characterized in that a guide _s which is arranged after the brake pin causes a second sharp change in the direction of movement of the yarn ο 9β Device according to one of the preceding claims, characterized characterized in that it is encased to hold back any liquid that is thrown off by the yarn passing through it during operation » 10, device according to one of claims 1-9 »characterized; that the feed and take-off rollers provide the means for the passage of a yarn through the device. 11 «, device according to claim 10, characterized in that the take-off rollers are heated v / erdeno 12 _U device according to claim 10, characterized in that the take-off rollers are located within a cover which is heated » 109817/20 59