DE1785027A1 - Process and apparatus for drawing and crimping synthetic yarn in a continuous process and yarn crimped in this way - Google Patents

Description

DR. ELISABETH JUNG, DR. VOLKER VOSSlUS, DIPL.-ING. GERHARD COUDEWEY PATENT Pending 1 7 ft ζ fi 9

• MÖNCHEN 2 * · 8ΙΕ0Ε88Τ3Α98Ε2β · TELEKOM «4 · β« 7 · TEtf QRAMM-ADRE88E; INVENT / MONCHIN

u, Z »AKU ΐ 165/1 la? 2ο August 1968

CMay / Oy)

KU8s ^f f 2IJIDS ÜHIJS K, V.
Arnheisn, Holland

Method and Apparatus- for Str ^^ kan, and- Crimping Synthetic Yarn In a lconti-nuierlieh-en. Method and G thus crimped

Priority: 4 August 1967 and 14 February 19 & 8

The invention shall look eiofe iBsbösondere to a method for fatxeekeix and supplied Kräuweln of synthet is ehern Gern in elneis kontinui he High method in which dae yarn at constant speed and / or konatanter voltage and then after ea _s was erhitat a Kräuaelb "- handlunß is subjected by passing along an essentially 2ig-zag-shaped tfeges and at a given contact angle a certain curling parts, in particular 2äanen, pins or blades, which move at greater or the same speed as the yarn feed speed, whereupon the produced oil is wound up.

A method of the type mentioned above is already known

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However, the known method has the disadvantage that Variations in yarn tension in the area beyond the crimped parts via these ropes work back into the ones in front Area. As a result, the yarn received has none sufficient evenness in the crimp and is uneven stretched *

The aim of the invention was to provide a method of the above To create a way that does not have these tile parts -j The invention lies in the fact that the yarn with the » Curling parts at a total angle of at least 20 radians is in contact and that the draw ratio of the yarn depends on the ratio of the yarn speed between the curling parts f measured at the point of greatest contact angle j the yarn feed speed is determined »This means that the yarn can be partly between and partly before the curled parts are stretched »Preferably a In applied angle of contact of about 40 radians a preferred embodiment of the invention The method used is the yarn tension in the area immediately next to the crimped parts, i.e. the area between the crimped parts and the winding device kept practically constant «· It is an advantage if the thread tension in the oban range from the constant value by more than about 10? S deviates.

When the drawn and crimped yarn is on a winding spindle is to be included, a simple exemplary embodiment of the method according to the invention is characterized characterized in that the rotation speed during the winding process the twisting spindle is programmed in such a way that the balloon tension remains practically constant is the yarn according to the invention only once between passed through the crimping parts meshing with one another.

109882/1485

An advantageous embodiment of the invention Method is characterized in that the yarn in The area after the crimping parts and in front of the winder is moved forward at a speed which is approximately 1 1/2 times the speed of the crimping parts, and that the yarn is not stretched in this area ".

The method according to the invention can in particular thereby there must be no sign that the yarn after it has been drawn and was curled, and before it was wound, in one

• I

continuous process is reheated, whereby it is practically without tension .. In particular, the yarn tension in the range dt * r heat treatment less than 0.001 grams per Denier,

untwisted the yarn on a bobbin is to be wiggled, the method is characterized according to the Invention advantageously aue that the line thread of the yarn in the area beyond the crimped parts and the winder with the help of a vortex flowing Confused and networked by means of pressure or * to be intertwined "

It has also been found that a ruffled Yarn of better quality, especially with regard to the gathering strength, the volume, the hiding power and the hand is obtained when the yarn according to the invention is characterized in that after heating the yarn in a relaxed state in saturated steam of 100 ° C the angle between adjacent sides is flar Ziek-zag line is smaller than 90 ° and is preferably approximately 80 ° o According to the invention, the crimp is along the length Uniform yarn The satisfactory grip of the Yarn and the beneficial properties of this yarn Manufactured tools are achieved especially when the yarn according to the Urfindun ^ is characterized by the fact that

1098827 U 85 BATH

the thickness of the Hinze! threads in the transition piece between each other adjacent sides of the zig-zag line, for example 5 to 15? I is less than at the other places of the zigzag

The invention also relates to an apparatus for producing such crimped synthetic yarns. This device consists of a frame with a number of adjacent places for treating the yarn "each of these places at least one feed device for the uncreeled yarn, an area in which the urine to be treated can be heated, a pair of intermeshing driven frizzy gears as well as devices for collecting or draining the crimped urine after leaving the gearwheels ο ttemäß according to the invention, the device is characterized in that at the pitch circle of each of the gearwheels the acute angle between the tangent on the tooth flank and the radius of the pitch circle is less than 15 ° and preferably about tO ⁰ is "According to the invention, the tooth pitch of each gear in a preferred Ausführunßsbeispiel the apparatus of 0.500 to O ₉ 95O mm" Advantageously, at each Zahhrad the strength of the teeth along the pitch circle measured about O ₇ 200 mm, and the total depth of each tooth is between 0.450 and 0.950 mm «. The best results can be achieved for whom: the device according to the invention is characterized in that the teeth of the two cooperating crimp gears, measured along their common center line, mesh with one another over a distance of 0.350 to 0.550 mm

Surprisingly, it has been found that textile yarns which have been crimped with a device _{according to the invention have a stronger crimping tension, d 0} ho a greater difference between the crimped length and the non-crimped length than the yarns produced with the conventional gear crimping devices

10988 2/14 85

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Yarn with a relatively "strong curl!" The invention can be particularly economical and effective. " Catfish are produced with a device that thereby let marked facilities for stretching and curling of the yarn by means of gears in a continuous Procedures are provided ο

The invention will be described in the following with reference to drawings Execution examples explained in more detail ο

t shows an apparatus for carrying out the method according to the invention!

Fig. 2 shows the movement of the yarn between the Krauaelteile;

Fig «3 shows the path that the yarn in angular Takes contact with the curling parts;

FIGS. 4, 5, 6 and 7 show modified exemplary embodiments the device according to the invention;

Pig. 8 shows, on a greatly enlarged scale, some meshing teeth of a pair of crimp gears; .

Fig. 9 shows, on a greatly enlarged scale, the crimped yarn according to the invention.

In the arrangement shown in FIG. 1, undrawn yarn 1 is drawn off via a thread guide 5 from a spinning bobbin 2 with the aid of driven feed rollers 3 and 4 via the drum between the not shown teeth of two gears 7 and 8, the peripheral speed of the gears 7 and 8, 1.4 to 2. time reached Depending on the desired titreokverhältnie 1st as large as that of the feed rollers 3 and 4ο as shown in FIGS. 2 and 3 is shown, the yarn moves between the toothed wheels 7 and 8 along an approximately zig-zag-shaped »egea through α

109 88 2/1485

JeuBeits of the gears 7 and 8, the drawn yarn by means of a driven Hollenbach 10 whose Umfangsgeaehwindigköit ao about 1 1/2 times is groll iat as that of the gears 7 and 8, moved forward _o DaB yarn 9 is 11 or by means of a separation roller several Male Ufa the conveyor roller 10 guided The tensile force applied by the conveyor roller to the other side of the gears 7 and 8 on the yarn is only ao strong that the stretched yarn 9 is not stretched any further, so that the stretching ratio of the yarn or the cogwheels is not is determined by the conveyor roller 10 "After leaving the conveyor roller 10 and passing through an eyelet 12, the yarn is wound in the conventional whiteness with the help of a twisting spindle to a yarn package 13 with beveled ends, which is supported by a sleeve 14" The package 13 is from a Surrounding ring 15, which traverses in the vertical direction and carries a rotating rotor 16.

Fig. 2 is a schematic representation of the zig-zaek path 17 of the yarn between the crimping parts, i.e. between the teeth of the gears 7 and 8. The tip circles of the gears 7 and 8 are shown at 18 and 19, respectively. As from the drawing It can be seen that the yarn is only once between your teeth passed through. The teeth of gears 7 and 8 are Shaped such that there is sufficient play between all intermeshing teeth 20 on all sides of the same istj so that the yarn is not pinched between the tooth flankη but is only grasped by the tips of the teeth when it comes into contact with them (see Fig. 3),

According to the invention it has surprisingly been found that advantageous results are achieved when the total angle of contact between the yarn and the gears at least 20 itediants, preferably approximately 40 liadianten is large o By the expression "total contact angle" the '«should denote the angle, the sum of the angle

109882/1485

B ₁ , a «, β., A-, ac, a ₆ etc *, (3Pi ₄ J .. 3), which correspond to the yarn path 17 at each of the teeth 20 and the tangents 21, 22, 28, etc. the tip circles 18 and 19 are included in the middle of the tooth surfaces α Ee aei added that an angle the size of a radian corresponds to an angle in the center of a circle spanned by an arc whose length is equal to the radius.

In one example, the head circles had 18 and 19 one. Diameter of 60 mm and each gear had 500 teeth »*

In the I ¹ ig. 4 and 5 corresponding parts are provided with the same reference numerals «

Figo 4 shows a modified embodiment, which differs from the one shown in Pig * 1 in that the conveyor roller and the separating roller are omitted « In addition, the speed of rotation of the ring spindle is required and thus the leg of the sleeve 14 is adjusted in this case so that the tension of the balloon 23 remains approximately constant.

In the AusfUhrungsbeispiel shown in Figo 5 is after the gears 7 and 8, a hole device 24 is arranged, which is supplied in the direction indicated by the arrow in vortices flowing air to confuse and cross-link or interweave the JBingle threads of the yarn, Venn-.das Yarn has loused the interlacing device 24, it is wound up into a cheese 25 which is driven by contact by a drive roller 26 "The yarn must be traversed in the known% eise in the directions indicated by the arrow 27". *

Figο 6 zei ^ t to another exemplary embodiment of the _r 3 and 4 in Fig. 1, 4 and 5, feed rollers used in the

109882/1485

a clamping device 29 shown schematically are replaced, which is constructed in such a way that the tension of the opening device The released yarn is constant on the other side Track wheels 7 and 8 can use the device according to FIG. 6 in a similar manner Like the devices shown in FIGS. 1, 4 or 5 be constructed ».

This is not the case with the arrangement shown in FIG stretched yarn 1 over a loading guide 5 from a spinning bobbin 2 with the help of powered feed rollers 3 and 4 over

End sucked o The yarn is then passed over or around a hot plate 6, whereupon it gets between the teeth (not shown) of the two gear wheels 7 and 8. _F depending on the desired stretch ratio, the peripheral speed of the gears 7 and 8 is 1.4 to 2MaI as large as that of the feed rollers 3 and 4 »As shown in Fi ^ indicated ₀ 2, the yarn of a moved between the toothed wheels 7 and 8 along approximately zig - serrated \ »egea through,

After the gears 7 and 8, the drawn yarn 9 is moved forward with the aid of a driven roller 10, the circumferential speed of which is about 1 1/2 times that of the gears 7 and S ₀ looped around the conveyor roller 10 a few times The tensile force applied to the yarn by the conveyor roller 10 behind the gears 7 and 8 is only so strong that the stretched yarn 9 is hardly stretched any more the feed rollers 3 and 4 is in no way affected by the feed roller

flat leaving äer conveyor roller 10 and the associated Separation roller 11. runs the yarn between a pair of each other meshing gears 30, 31 with large teeth, which rotate at such a speed that the yarn swi-

109882 / U8 5

Aohen the teeth slip through, ao that it is under tension in front of the gears 30 and 31 and is practically without tension behind the gears 30 and 31.

In the area of the gears 30 and 31 »where the yarn eats practically without tension, a device 32, the electrical heating element, not shown, for example includes, afterwards "during the tension-relieving post-warming treatment, the crimping caused by the crimping gears 7, 8 is developed practically completely"

At the end of the Kachheizzone there is yarn over a conveyor roller 33 and a separating roller 34 cooperating with it directed ο

After going through an Üs «12, the Gern is finally made in the conventional manner with the help of a King-twisting spindle wound on a body 13 with beveled linden trees, which is supported by a sleeve 14, around the package around a ring 15 is provided, which traverses in a vertical direction and carries a rotating rotor 16 »

Mg. 1 shows only a place for crimping yarn · In In practice, the device according to the invention comprises a whole number, for example 10 or more, of such adjacent places for curling, which are fastened in a known manner to a frame.

Pig, 8 shows, on a greatly enlarged scale, some 2 teeth which are arranged symmetrically to the common center line of the gears 7 and 8. The pitch circles of the gears 7 and 8 are shown at 35 and 36 * The two gears 7 and 8 have iävolventenzäane, and at the cable circuits 35 and 36, the acute angle between the tangent to the tooth flank and the radius of the pitch circle erfindungegemäß preferably io ^p o The tfuükreiee of the track wheels 7 and 8 and at

109882/1405 bath

37 or 38 indicated The tooth pitch (* TT χ module) of the Gears 7 and 8 is shown along the line at 39 and 40 respectively Partial circle measured tooth thickness of gears 7 and 8 let Shown at 41 and 42, respectively, the meshing point of the gears is indicated at 43 while driving. In one embodiment of the device according to the invention, the number of teeth on each crimp gear was 300, which was module 0.20, so that the diameter of the pitch circle ζ χ m » 300 x 0.20 to 60.00 mm was the size of this example The depth of engagement 43 of the gears was 0.380 mm »and the diameter of the tip circles 18, 19 and the root circles 37, 38 was 60.420 mm and 59378 mm, respectively.

9 shows, on a greatly enlarged scale, the appearance of a crimped thread of the yarn according to the invention "after the yarn has been unwound from a bobbin and heated in a relaxed state in steam at 100 ° C. 6 Ee" shows that the yarn is very regular Crimp has σ Bel the yarn shown in FIG. 9, the angle between adjacent sides 46t 47 of the Ziok-Zaok line is approximately 70 °. At the transition points 48 between adjacent sides of the zigzag line, the thickness of the thread is 3 to 1 $ / ^ less than at the other points of the zigzag line.

Ea can be made within the invention various modifications »

109882/14 85

Claims (1)

Expectations A method of drawing and crimping synthetic yarns in a continuous process in which the yarn is fed at a constant speed and / or constant tension and then, after being heated, is subjected to a crimping treatment by moving it along a substantially drawstring shape and under a given Angle of contact between a set of crimping parts, in particular teeth, pins or blades, which move at greater or the same speed as the yarn feed speed, whereupon the yarn produced is wound up, characterized in that the total contact angle between the yarn and the crimping parts is min "Is at least 20 hadians, and that the draw ratio of the yarn depends on the aforementioned contact angle and the ratio of the yarn speed between the crimped parts? measured at the point of the greatest contact _{angle t is determined} for the yarn feed speed <, 2. The method according to claim 1, characterized in that the yarn is partly between and partly is stretched before the crimping parts. 3 · Method according to claim 1 or 2, characterized in that ..— k e η η ζ e i c h η e t that the contact angle is approximately 4Ö radians is big » 1 0 9 8 8 2 / U 8 5 4 <, method according to claim 1, 2 or 3, characterized in that the yarn tension in the range immediately behind the crimped parts, i.e. the area between the crimping parts and the winding device are kept practically constant 5 β method according to claim 4 »characterized in that the yarn tension in the mentioned range from the constant value is no more than approximately 10 ''. deviated 6β Method according to claim 4 or 5, in which the .gestreckte and crimped yarn is taken up on a ring twisting spindle, characterized in that that during the Aufapulvorgangs a the speed of rotation the twisting spindle is varied * 7 »Method according to claim 6, characterized in that the speed of rotation is such is set so that the Bailon voltage is almost constant remain. 8o method according to claim 1, 2 or 3, characterized in that the yarn in the area behind the crimping parts and in front of the winder with a Moving speed forward is ^ which is about 1 1/2 times that Speed of the crimping parts corresponds, and that the yarn is not stretched in this area 9. ο Method according to claim 4 or 5, in which the yarn is wound onto a bobbin in the non-twisted state, characterized in that the individual threads of the yarn in the area behind the Kraueelteiien and in front of the winding device are confused and networked or interwoven with With the aid of a fluid flowing in eddies under pressure 109882 / U85 9t - 1O _{0 The} method according to claim 1 or 2, characterized in that the yarn is passed through only once between the crimping parts that mesh with one another ο 11 ο method according to one or more of the preceding Claims, characterized in that that the (ram after being stretched and curled and before 8 is wound up in a continuous process is reheated, with practically no tension is. 12 ο A method according to claim 11, characterized ge k e η η is characterized in that the yarn tension in the field of heat treatment lot less than 0.001 g per Denierο 13 «Crimped synthetic yarn made of single threads, in particular made of polyamide or polyester with an essentially zigzag-shaped crimp, which was created by passing the yarn through an area in which two interacting gears mesh with each other, characterized by -> dati after heating the yarn in a relaxed Zuutand in saturated steam of 100 ° C, the angle between adjacent sides of the zigzag line is less than 90 ° ο Ho crimped yarn according to claim 13 «characterized that the mentioned angle is between 20 ° and 90 ° o 15o crimped yarn according to claims 13 and 14 ₉ characterized in that the aforementioned angle is approximately 80 °. 109882/1485 16ο Crimped yarn according to claim 15 _s characterized in that the crimp length of the yarn is uniform » 17. Crimped yarn according to one or more of the preceding claims, characterized in that that the thickness of the threads at the transition point between adjacent sides of the zigzag line are less than at the other points of the zigzag line. 18o crimped yarn according to claim 17 »characterized in that the thickness of the threads at the transition point between adjacent sides of the zigzag line is 5 to 15 i" less than at the other points of the zigzag line ο 19 »Apparatus for making crimped synthetic Yarn »which consists of a frame with a number of adjacent ones There are places for treating the yarn, each of these Places at least one feed device for the uncrimped yarn, an area in which the yarn to be treated can be heated, a pair of intermeshing driven crimping gears, and means for collecting or Removing the crimped yarn after leaving the gears, characterized in that on Pitch circle of each of the gears is the acute angle between the tangent on the tooth flank and the radius of the pitch circle less than 15 ° o 2Oe device according to claim 19 »characterized in that the angle mentioned is approximately 10 °. 21 ο Device according to Claim 19 or 20, characterized in that the tooth pitch of each gearwheel ββ 109882/1485 1765027 is less than 1 22 »Device according to Anäpruoh 21, thereby g e k e η η - show that the tooth pitch is from 0.500 to 0.950 with is preferably 0.628 mm «, 23 ο Device according to one or more of claims 19 to 22 _P characterized ge k eη η ζ ei without t, that the tooth pitch of each gear measured along the pitch circle is less than 0.500 now * 24 ο device according to claim 23? characterized in that the f Zahndioke is about 0.200 mm. 25ο Device according to one or more of the claims 19 to 24? characterized in that the total depth of the fore of each gear between 0.450 and 0.950 mm is ο 26o device according to one or more of the claims 19 to 25s characterized in that the Teeth of the two cooperating Krauaela gears, lengthways measured from their common center line, comb over a distance that is less than 1 mm " 27. The device according to claim 26, .thereby ge k e η η - draws that the depth of engagement of the teeth between 0.350 and 0.550 mm is « 28o Device according to one or more of the claims 19 to 271 characterized in that it e if the teeth are involute teeth, and that Module 0.20 is * 10.9 8 8 27 U 85 29 «Device according to one or more of the claims * 19 to 28, characterized in that a » directions for stretching and puckering the yarn by means of gears in a continuous process provided 109882 / U85 / ψ Lee r s e i t e