DE1785265A1 - Method and device for the production of twist-crimped filament yarns - Google Patents

Description

IMPERIAL CHEMICAL INDUSTRIES LTD ,, London, Great Britain

concerning?

"Method and device for the production of twisting pucker ·

ten thread yarns "

PRIORITY; September 4, 1967 - Great Britain

The invention relates to a method and an apparatus

for the production of twist-crimped threads. M.

It is known to produce twist-crimped thread yarns by that you have a false twist on a running multifilament yarn by rotating it in a false twisting device and that the twisted threads are heat set so that when they come out of the twisting zone they remain crimped. For economic reasons, high linear thread speeds are preferred, but these require high thread twisting

109883/1464

ORIGINAL INSPECTED

1735265

speeds to allow the desired number of crimps per unit length is applied to the resulting threads. It is also known such a false twist crimping process to be carried out during a drawing of a melt-spun filament yarn, but the high false twist rotation speeds required set a relatively low practicable with regard to the linear displacement speed Limit"

It is also known to process twist-crimped pad yarns by processes with no moving parts that touch the running thread. In this process, two yarns are pre-twisted around each other along part of their length, and the yarns are then called continuous filaments through such a pre-twisted zone with a twist retention device passed through which completely prevents the predetermined retained thread on the running thread expires .. In the known procedures in which this method is used, no high twisting speeds are required., but it was necessary to introduce devices such as conical ones Roles. To ease the tension in the * two under twisting restraint to compensate for twisted threads. Another disadvantage is that the threads are curled less tightly when two thread yarns around each other with a given number of Windings per unit of length are twisted as if individual

109883 / US4

BATH ORIGINAL

Threads are twisted around each other in a yarn in the same way.

It has now been found that under certain conditions similar Strands of thread continuously through a process with withheld Twist can be twisted, namely even at high speeds without the need for one Mechanism for balancing the tension between such twisted strands so that the strands become simple in the usual manner Threads as well as multifilament yarns can be; through the process can also a series of fine strands of a low-key twist be subjected.

The invention is a process for the production of Twist-crimped thread yarn, which is characterized by "that one passes through a feed device at the same speeds a series of strands of thread passes through, which are not twisted around each other and which each consist of at least one Thread, and that you pull the strands at the same speeds discharges under at least a low tension by a forward movement device, whereby between the feed and means for advancing the strands around one another a predetermined number of turns by mutual twisting be twisted between leadership assemblies, each individual leadership in these assemblies leads a strand,

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BATH ORIGINAL

and wherein each assembly has an axis of symmetry which coincides with the axis of the twisted strands, and where Finally, the twist is fixed by heating and cooling the twisted strands between the guide assemblies will.

A method is preferred in which the angle of the individual Strands through each individual guide in a compilation

^ are the same.

It is also preferred to have two mutually rotatable guide assemblies to use * that touch each mutually twisted group of strands.

The twist retention method of the present invention can be integrated with a stretching in which In the event that said advancing means involves a stretching fc role is. "Stretching" becomes general in technology Known process meant in which melt-spun threads are converted into usable textile threads by making them continuously be stretched to a relationship that is natural to theirs Draw ratio corresponds. In such a procedure can any suitable stretching device can be used, for example heated feed rollers, heated or unheated braking devices or heating devices that have no braking effect

109883 / U64 BADORiGiNAL

yield "It is preferred that at least a portion of the thread extension, which takes place at such a drawing process, going on before the filaments reach the Zwirnungszone. If the selected stretching device has a heated zone in an essentially straight length of the path at least after the first part of the stretching, then such a heated zone can also be used in an expedient manner to accomplish the function of heat setting the retained twist "

The twist crimping method of the present invention can also immediately follow a stretching in which In case the feeder mentioned above becomes the stretching roller of a previous stretching operation.

In order to work smoothly and quickly, they become natural Filament traps usually created by taking filaments continuously from a spinneret plate with no intervening Winding and unwinding introduced into the method of the invention will. If the inventive method does not work this way is integrated with a spinning, then individual strands of thread be created separately by the fact that they are from the side or are unwound upside down from a separate reel, or they can be obtained in parallel bundles from a spool * which is unwound from the side so that there is no twisting

109883/1464

BATH ORIGINAL.

respectively occurs. Multi-threaded strands can / from a separate bobbin Be unwound overhead, the slight unwinding twist of the threads within the strands of the method according to the invention is not appreciably affected, provided that the strands are not twisted about one another before they pass the twisting zone between reaches the feed and advance rollers,

According to the invention an apparatus for manufacturing W continues to position suggested by zwirnungsgekräuselten filament yarns, which is characterized in that between a 2JF (Ihrungs- and a forward moving means sets of bushings with a common axis of symmetry, opposite to each other about an axis parallel to this axis of symmetry are rotatable, has a device for causing and preventing such mutual twisting, and between the assemblies has a heating and a cooling device for fixing the twist.

It is preferred that the compositions are in planes at right angles to the axes of symmetry and rotation.

It is preferred that the axes of symmetry and rotation coincide.

In a preferred form, such a device is on a known Verstreokmaschins mounted so that the feeder

109883 / US4

1,

BATH ORIGINAL

of the device according to the invention are the stretching rollers of the Verstreekmasehine.

In a further preferred form, such a device is mounted on a stretching machine equipped with known means for drawing strands of thread so that the feeding and advancing devices of the device of the invention are the feeding and stretching rollers of the drawing bar, known stretching devices are provided before the first guide compilation.

It is clear that any known stretching device, e.g. Heating or burner devices can be used.

An embodiment of the device according to the invention is shown in FIG Figure 1 of the accompanying drawings is shown in which two multi-hole twist retention guides 31 and 32, wherein the second of which can be rotated and held, are provided at the ends of a zone 33 in which one is heated Plate 3 ^ and an unheated space 35 are located. The guides 31 and 32 are between a feed roller 36 and a stretching roller 37 placed, with a heated brake pin 38 also being present between the feed roller 36 and the guide 31. In operation, the strands 39 are through corresponding holes in guides 31 and 32 and then around the feed roller 36, around the brake pin 38 and around the stretching roller 37.

1 09883 / U64

The guide 32 is then rotated a certain number of turns and held in place. The strands are then twisted between the holes 51 and 32 as explained, the twisted threads being heated by contact with the plate Jk.

In this device, the threads are drawn by a conventional verse method in which the threads both over a brake pin as well as running over a plate, stretched, and at the same time they are twisted crimped according to the method according to the invention, as they pass over the plate and through the cooling zone between guides 31 and 32.

It is emphasized that those shown in Figure 1 of the accompanying drawings explained guides 31 and 32 not in practical operation are very useful because of the need for the Strands have to be threaded in that their ends are Huroh Lb'cher in the guides are passed before the strands in a continuous process between the feed and stretching rollers be stretched »It is highly desirable to use threadable guides into which continuous strands can be inserted while moving forward continuously,

According to the invention there is also an improved multiple thread guide proposed, which is particularly suitable for the method according to the invention in which the twist is retained,

1 09883 / U64 BADORlQlNAt

which is characterized in that it has a compilation of threadable guides for individual strands, the are arranged symmetrically about an axis of symmetry, the assembly being rotatably mounted in bearings that have a larger one Radius as the radius of a circle, each individual Includes guides of such an assembly, and wherein the assembly is provided with means for such rotation can be caused and prevented. Such a 'multiple thread guide is hereinafter referred to as "orbital twisting guide" designated. Such individual guides are preferably in a plane perpendicular to the axis of rotation and concentric and evenly distributed around this axis.

In a preferred form, the orbital twist guide has of the present invention a part that is rotatable within Storage is arranged in which part inwardly directed slots in a plane at right angles to the axis of rotation have inner closed ends that are symmetrical about the axis of rotation are located within a radius smaller than the radius of these bearings and have outer open ends, which are each threaded into the bearings through seat braid can, namely in angular positions of this part in these Bearings with these slots in the part facing inward extensions the slots are in the bearings.

109 883 / U64

According to a further preferred form, the orbital twist guide has According to the present invention, a part as essentially described above, which is rotatably arranged in bearings

the same

is, with a piece / removed to allow removal and reinsertion of the slices, and then can be added again.

^ An embodiment of the orbital twist guide of the present Invention is shown in Figures 2 and 3 of the accompanying drawings

- explained. Two .Plates 1 and 2, which are separated by spacers 3 and

are
k are connected to each other / by through circular holes 5

pierced, each of which is surrounded by recesses 6 concentrically. The plates 1 and 2 also have slots 7 which cut through the recesses 6 up to the holes 5 = nylon bearing inserts 8 are present in the recesses 6, which are slotted so that they do not close the slots 7. A gear wheel 9 is provided between concentric annular projections P which extend into the recesses 6 and sit in the nylon bearings 8. The gear 9 meshes with a pinion 11 which is rotatably arranged between the plates 1 and 2 on an axis 12 which extends through the plate 1 and with a drive and a blocking mechanism (not shown)

which is connected. The sub-assembly of / gear 9 and the projections 10 is pierced by radial slots 13, from each of which contains an inserted ceramic thread guide /,

109883/1464 ORIGINAL BATHROOM

where (ite guides I ^ concentric in gear 9 on a circle are arranged, which has a diameter which is smaller is than that of holes 5

In operation, the gear 9 is rotated until a slot Ij with the slots 7 is aligned, and a strand of thread is then inserted through these slots into a ceramic thread guide 12, The gear is then rotated until another slot 13 with is aligned with the slots 7 and a second strand is inserted in a similar manner. This procedure is repeated until all strands required in a special process into one separate thread guide 1? are introduced. The gear 9 is danr rapidly rotated by the drive shaft 12 by means of a device not shown until a desired number of Twist twists are applied to the strand. Then will another rotation by blocking the axis 12 with eini Prevents device not shown. During the twisting process the strands are between a twist return and twisted the orbital guide which, when blocked, serves as a second twist restraint. It is preferred for the first twisting reluctance is either another similar one Orbital twisting or a slotted guide part to νei turn, which is similar to the orbital twist guide but not rotatable is stored.

1Q9883 / U6A

BADOBlStNAt

Another embodiment of the orbital twisting is in the Figures 4 and 5 of the accompanying drawings illustrated

A sub-assembly of a gear 20 and protrusions 21, which are similar to parts 9 and 10 of FIG provided with guides 22 which are similar to the guides 15 of FIG but are so spaced that they suitably correspond to the spacing of the holes in the spinneret, through which the threads to be crimped are extruded. Two pairs of housing plates 23 and 24 and 25 and 26 are respectively connected by spacers 27 and 28, and by a not shown Establishment held together along line XX.

In operation, the housing assembling 23, 24 and 27 is removed, the FUhrungunterzusammenstellung 20 and 21 is pulled and maintained under a Spinndiisenplatte from which the * A monofilament or a raehrfädiger strand is by the inventive process threads to be treated challenges k & men hindurchgeflihrt through each guide slot , The guide subassembly is reinserted into housing panels 25 and 26, and housing panels 23 and 24 are brought into place and secured along line XX. A twist retention guide that can be a similar orbital twist guide is threaded in a similar manner. The guides are placed at each end of a heating zone between the feed and draw rollers

1Q9883 / U6A _föA DOB! G! NAL

are present and the strands are then

and Verstreekrollen laid. Finally, the qrbital twisting

The guide is rotated to achieve the desired twist in the running thread to evoke.

The orbital flow guide of the present invention is shown in FIG expediently also designed as a DoppeIfUhrung, like it can be seen schematically in Figure 6 of the accompanying drawings.

twisted
Two thread lines run parallel through a guide, the one

S-thread in the right paden line and a Z ~ thread in the left Threadline when rotated as shown causes * so that the After the twisting crimping, thread lines can be pinned in an expedient manner in order to produce a crimped thread yarn, that is free from a torque *

The invention is illustrated by the following examples.

example 1

A melt spun ply-free yarn made of polyethylene terephthalate which consisted of 15 filaments each 18 to and a viscosity number, screened eat in orthochlorophenol at 20 ⁰ C, of 0.65 and a birefringence of 0.008 had been withdrawn from the side of a coil, and the filaments were individually through a group of 15 concentrically evenly arranged holes of Q-, 76. mm diameter threaded on a circle of 19.0 mm

■ 109883/14 6A · η

BATHROOM ORIGINAL I-

Diameter in a steel disk of 25.4 ram diameter. The threads were passed in a similar manner through three other similar discs, which were then fastened in brackets, the first between the spool and the feed roller of a stretching frame, the second between a heated brake pin and a heated plate between the feed roller and the Stretching roller of the stretching frame were attached, the third after the plate and the fourth before the stretching roller. These disks were arranged so that the separately guided threads from the first to the fourth. Disk without twisting ran "The brake pin had a diameter of 50.8 mm and was heated to 95 ⁰ C, the plate was 203 * 2 mm long and heated to 200 ⁰ C, and the third disc possessed by the end of the plate a distance of 101.6 mm. The yarn was placed around the feed roller, which rotates at a surface speed of 25 rpm, then around the brake pin and over the stretching roller, which rotated at 100 rpm. The third disk was then rotated and clamped after a twist of 70 turns per 25.4 mm had been built up between the second and third disks, and the heated plate was brought into contact with this trapped, twisted portion of the threadline. A drawn and bulked yarn with e'.nexc: torque was formed which had heavily crimped threads

109883/1464 _BADOf , _1G1N AU

Same Ewei spun from polyhexamethylene adipamide, which had the two threads 35 and a birefringence of 0.005 and a relative viscosity of 35 »screened eat at a 8.4 #igen concentration in 90 #iger formic acid at 25 ⁰ G, possessed, received from the The side is pulled off the spools and stretched at 305 m / min on a stretching frame to a ratio of 5> 5, the stretching frame having feed rollers heated to 95 ° C., a 304.8 mm long plate heated to 230 ° C. and cold stretching rollers . The double orbital twist guides as shown in Fig.

of the accompanying drawings have been arranged

hot one between the hot feed roller and the / plate and the other between the hot plate and the straightening roller. A 152.4 mm gap was left between the hot plate and the second orbital twist guide in which In between, a kiihiluftstrora directed against the threadline became. The two strands of each yarn were cut into two each diametrically opposed guides in one of the Rotors of each double orbital twist guide inserted. The second twister was then rotated at 1100 rpm until 120 twists each 25.4 mm in the threadlines above the hot plate were constructed, with an S-swim in a threadline and in the other was compelled. The OrbifcaizvjirungsfUhrung was then arrested, and the two ferry lines vaurden on the Stretcher roll plied and wound up, with a spiral shape

109883/1484

obtained crimped yarn with a balanced torque became.

Example 3

Two 79 denier monofilaments of polyhexamethylene adipainide with one Birefringence of 0.0009 and a relative viscosity of 35 », measured as in Example 2, were withdrawn from reels overhead and processed as in Example 2, but with single orbital twisting guides, like them in the Pig. Figures 2 and 3 of the accompanying drawings have been illustrated, used, and various Draw ratios between 3.0 and 6.0 were used * Using a tension meter in the cooling zone of the twisted paden line it was found that the maximum number of Twists 25.4 mm each, without tearing the running thread line could be applied, with an optimal tension in the twisted Range between 1.5 and 2 g / den was reached, which corresponded to draw ratios between 4.6 and 5 * 4, within which area a highly crimped drawn yarn with a tensile strength of approximately 3 * 5 g / den was obtained. "

Example 4

3 yarns of 128 to * had each 20 yarns of polyethylene terephthalate and a birefringence of 0.008 and a viscosity number, gens eat in orthochlorophenol at 20 ⁰ C, of 0.6 ¹ H

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BATH ORIGINAL

■ - ■ 17 -

were unwound upside down and using the stretching process stretched from example 2 to a ratio of 3 * 86, however, the hot plate has a temperature of 215 ° C exhibited. The three yarns were symmetrically arranged in a simple orbit1 twisting guide, like in Pig. 2 and 3 of the accompanying drawings, inserted, each after the hot feed roller and placed after the hot plate. A retained twist of 25 turns per 25.4 mm was made over the hot plate applied by rotating the orbital twist guide at 1100 RPM and then holding the guide in place. The yarns were puckered after the draw roller to make a drawn crimped triple yarn with a torque.

Example 5

3 threads made of polyethylene terephthalate extruded at 290 ° C were separated below the spinneret by a ceramic guide in the form of a comb before they were around a heated feed roller at 95 ° C and a cold stretch roller were performed, which has a draw ratio of 3 »83 at a Final winding speed of 2438 m / min, with each Thread had a titer of 15 den. The three threads were symmetrically inserted into the slots in two orbital twist guides inserted in Fig. 2 and 3 of the accompanying drawings, which are arranged between the feed and stretch rollers were, and between which the guides of the threads were a 6O9> 6 mm

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BAD ORlGiNAU »

1 i

long, grooved hot plate of 2 ^ 0 ⁰ C, followed by a cooling zone of 204.8 mm, in which there was a transverse cooling air flow Twist of 50 turns / 25.4 ram in the groove of the hot plate was caused. The leadership was then blocked. This integrated spinning, drawing and l'e ^ turizing process resulted in a three-ply bulked yarn with a torque

Example 6

2 spun yarns of 80.5 the polyethylene terephthalate, each containing 8 filaments and a birefringence of 0.008 and a viscosity number of 0.65 * determined in a solution of 1 #igen orthochlorophenol at 20 ⁰ C, exhibited, were separated by a stretch ratio 3,4 roll over a hot feed "(90 ⁰ C) and a hot plate (20O ⁰ C) to 609.6 m / min drawn, wherein a yarn twist of 1/2 Erehuhg / 25 * was caused. 4 The two yarns were symmetrically laid in two separate orbital twist guides as shown in Figures 2 and 3 of the accompanying drawings, which were positioned between two rollers, both rotating at surface speeds of 121.9 m / min one guide between the first roller and a grooved hot plate (185 ⁰ C) of 609.6 mm length and the other between a cooling air flow immediately after the hot plate and the

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BATH ORIGINAL

second role was arranged. The two yarns that came from the second roll were fed through a 609.6 mm long hot air tube (air circulation in the same direction as the yarn, 230 ^° C., 1.05 at) to a third roll, which was moving at a speed rotated from 60> 9 m / min.

A restrained twist of 60 turns / 25 Λ rom was applied to the running threadline above the hot plate by rotating the orbital twist guide at 1100 rpm, whereupon the guide was blocked. The yarns coming from the third roll were pinned, with a stabilized pucker Low torque yarn was obtained.

It should be noted that the method and the apparatus While the present invention can be used with any number of strands running at a wide variety of speeds, which are available with winding devices, can be drawn, but that they are especially fine with several Strands are applicable that are drawn at high speeds as they were with integrated spinning-drawing processes be encountered.

PATENT CLAIMS

98 * 3 / U SV BAD ORIGINAL

Claims (1)

Godfather tan s ρ r ti che % 1. Process for the production of twist-crimped filament yarns, characterized in that a number of strands of thread are fed through a feed device at the same speeds which are not twisted around each other and which each consist of at least one thread, and that the strands with same speeds under at least a low tension by a forward movement device, with between the Feeding and advancing device the strands around one another are pre-twisted around a specified number of turns by mutual twisting between guide assemblies, with each individual guide, in these compilations one Strand guides, and each composition has an axis of symmetry which coincides with the axis of the twisted strands, and finally twisting by heating and cooling the twisted strands between the leadership assemblies is fixed. 2. The method according to claim 1, characterized in that the The angles of the individual strands through each individual guide in a compilation are the same. BATH ORIGINAL 109883 / U6V j5. Method according to claim 1 or 2, characterized in that that two mutually rotatable guide assemblies each touch mutually twisted group of strands. 4. The method according to any one of claims 1 to 3, characterized in that melt-spun filaments are stretched between the feed- forward moving means and that m is at least takes place a part of the stretching before the twisted zone. 5 «Method according to one of claims 1 to 4, characterized in that that a group of strands in S-configuration are twist-crimped and that another group of strands in Z-Kon- ' figuration, twisted crimped, the groups of twisted crinkled Strands are combined to produce a balanced torque yarn ► 6, Apparatus for making twist-crimped thread yarn, characterized in that it is between a feed and a forward movement device sets of guides with a common axis of symmetry that oppose each other are rotatable about an axis parallel to this axis of symmetry, and a device for causing and preventing a such mutual twisting, and between the compilations gene a heating and a cooling device for fixation the twist. 109883 / UI4 7. The method according to claim 6, characterized in that each Puhrungszammlung in a plane at right angles to the axes of symmetry and rotation. 8. Apparatus according to claim 6 or 7 > characterized in that the axes of symmetry and rotation coincide. 9. Device according to one of claims 6 to 8, characterized characterized in that the feed device are the stretching rollers of a known stretching machine. XO. Device according to one of Claims 6 to 8, characterized in that the supply and forward movement devices are the feed or stretching rollers of a stretching machine, in the known stretching devices before the first Puhrung compilation are arranged. 11. Mehrfachfadenföhrung, characterized in that they have a Has compilation of individually threadable guides which are arranged symmetrically about an axis of symmetry, wherein the assembly is rotatably arranged about an axis parallel to the axis of symmetry in bearings that have a larger radius than have the radius of a circle that includes all individual guides, and wherein the assembly with a device is provided with which such rotation can be caused and prevented. 1Q9883 / U64 12. MehrfachfadenfUhrung according to claim 11, characterized in that that the individual guides in a plane perpendicular to the axis of rotation. 15 · Multiple thread guide according to claim 12, characterized in that that the individual guides are arranged concentrically and equidistantly around the axis of rotation. 14. Multiple thread guide according to claim 11, characterized in that that it has a part in which inwardly directed slots are in a plane at right angles to the axis of rotation have inner closed ends that are symmetrical about the Axis of rotation are arranged within a radius which is smaller than the radius of these bearings, and have outer open ends, each of which can be threaded through slots in the bearings, in angular positions of this part in this camp, at which these slots in the part are inwardly directed extensions of the slots in the bearings. 15. MehrfachfadenfUhrung, characterized in that it is a The part of claim 14 rotatably disposed in bearings with a piece of it removed to allow removal and reinsertion of the discs, and then again can be added » 109883 / U6A 16. Double multiple thread guide, characterized in that they have two leadership additions according to one of claims 11 to 15, which can be rotated in opposite directions by a common drive mechanism. PATENT LAWYERS WL-ING. H. FINCKE, DIPL-ING. H. BOHX DIPL-ING. S. STAEGER 1098 8 3/1464 Lyre soap