CN1065006C - Method and apparatus for spinning synthetic multi-filament yarn - Google Patents

Abstract

A process for spinning, drawing and winding a synthetic thread includes subjecting the thread (1) to heat treatment between drawing and winding to minimise tendency to shrink. The thread is led close to, but not touching a long heated surface at a temp. pref. 100 K, more pref. between 200 and 300 K higher than the thread m.pt. and is subject to a tension lower than that to cause plastic deformation, i.e. pref. less than 0.3, more pref. between 0.1 and 0.2 cN/dtex. The wound thread has a tendency to heat, or boiling, shrinkage of more than 3%. Also claimed is a machine for the process comprising an unheated Godet wheel (54) for drawing off the thread from the stretching zone and, following the Godet wheel and before winding, a heater (8) providing the long heated surface at the temp. required.

Description

The spinning synthetic multi-filament yarn method and apparatus

The present invention relates to be used for the method and apparatus of spinning, stretching and the coiling of synthetic multifilament.

United States Patent (USP) the 4th, 123 discloses a kind of with method and apparatus single, that series-operation spins, stretches and reel synthetic multifilament No. 492.In this operation, yarn shrinks in package easily, thereby makes the yarn of coiling bear very high tension force, thereby may cause the damage of package.This problem is at coiling nylon 6 and nylon 6.6 (acid amides) yarn, and particularly serious during polypropylene yarn.Therefore, before reeling, must carry out shrink process so that eliminate the possibility of its contraction to yarn.But this extra operation is owing to the reason of textile technology aspect is disadvantageous, because the tendency that yarn shrinks because of being heated in the operation of many back is useful.

The spinning method and the device that the purpose of this invention is to provide a kind of synthetic multifilament, it comprises eliminates the tendency that yarn shrinks in package, but not appreciable impact is specifically in heat treatment or the contraction tendency of boiling and boiling and causing, this process operation for the back is useful.

More particularly, the method and apparatus that the purpose of this invention is to provide a kind of the above-mentioned type, it comprises that the tendency of i.e. cold contraction is reduced to harmless degree with so-called package contraction, and not appreciable impact useful thermal contraction in the processing operation of many back is inclined to.

In order to realize above-mentioned purpose and advantage with other of the present invention, the invention provides a kind of method and apparatus, it comprises the step of fused mass to form many filaments of advancing and these filaments to be formed the yarn of advancing of squeeze polymer.Make the yarn of advancing bear stretched operation then, thereafter, the travel path that the guiding yarn of advancing separates substantially with a microscler area of heating surface by a vicinity but at least, thereby the yarn that heating is advanced.The area of heating surface is heated above the temperature of the melt temperature of yarn, and in this heating process, the yarn of advancing bears a deficiency so that the tension force of yarn plastic deformation.At last the yarn of advancing is wound into package.

It is high the most about more than 100 ℃ that the temperature of the area of heating surface cans be compared to most the melt temperature of yarn, advantageously than between high about 200 ℃ and 300 ℃ of the melt temperature of yarn.

In heating steps, yarn bears a tension force, and this tension force is not more than about 0.3cN/dtex in heating steps, this tension force in heating steps, be preferably in about 0.1 and 0.2cN/dtex between.

The yarn that obtains like this has thermal contraction tendency, and it is greater than about 3%, more preferably greater than 20%, advantageously between about 30% and 40%.

The invention has the advantages that: the textile technology performance of yarn is not subjected to the negative effect of shrink process of the present invention.Specifically, open around after, yarn still can have high thermal contraction tendency, for example still can boil and boil contraction.In addition, feeding roller or the feeding system that makes yarn send into or leave the shrink process district need not to be heated.This is not only the remarkable simplification in the mechanical engineering, and can carry out more favourable control to process.In processing procedure, yarn only bears yarn tension, and this tension force is lower than the needed tension force of yarn that stretching has been orientated.Under the situation of acid amides, polyester or poly-terephthalic acids trimethylene ester (polytrimethylene terephthalate) yarn, the temperature of the area of heating surface preferably is higher than 350 ℃, and under the situation of polypropylene yarn, the temperature of the area of heating surface preferably is higher than 200 ℃.

The present invention can make yarn advance in spin district and/or shrinking zone and/or winding zone under very little tension force, unsettled spinning streamline can not occur or generate the overlapping or unsettled phenomenon of other process on deflector roll.

In preferred embodiment, yarn guides along the area of heating surface by one or more short guiders, and above-mentioned short guider distributes along the area of heating surface.Its purpose is to guide yarn to leave the accurate distance that limits of the area of heating surface.Above-mentioned distance should be 0.5 to 3.5mm.

As mentioned above, yarn is advanced under very little tension force in the shrink process district.This can make operation simplify, and the tension adjustment of yarn is got be suitable for simultaneously reeling.

In one embodiment, heat treated is carried out between two yarn feeding deflector rolls.Its advantage is to regulate very equably the tension force of yarn, and therefore, contraction can be subjected to better controlled.

Spin in the operation short, very sensitive to shrinking at the yarn of system, problem is very big in winding process.In this case, preferably adopt one embodiment of the present of invention, wherein, yarn directly marches to the coiling bobbin winder from spinning box, and does not use the yarn feeding deflector roll, withdrawal speed greater than 5000m/minute, be preferably between 6000 and 7500 meters/minute.

Method of the present invention is suitable for all polymer in using, and can produce high-quality polyester yarn package, its open around after still have to be higher than 20% thermal contraction or to boil and boil contraction.

The processing of exempting to contract concerning acid amides is a particular importance.Carry out at present, particularly use exempting from the processing of contracting and to produce comprehensive minimizing of shrinking tendency of steam.The most right method of the present invention is eliminated the contraction in the package only, but the contraction tendency is constant when heating, shrinks tendency and still can regulate by other parameter of machining control.

This is equally applicable to polypropylene yarn, and polypropylene yarn can produce serious problem when reeling in common method.

According to the particularly advantageous drawing process of one embodiment of the present of invention comprise with greater than 3500 meters/minute at a high speed by deflector roll from the spinnerets stretch yarn, and make yarn pass through a narrow heating tube.In heating tube, yarn stands to stretch because of tension force and heating.Up to now, this method is very impracticable always for shrinking tendency strong material, particularly nylon and polypropylene, and this is because the method for this stretch yarn can make yarn produce very high contraction tendency in package.But, combine with method of the present invention, but make this method go for various types of materials.

Before heat-treating, can make yarn bear stretched operation, wherein, yarn very contiguouslyly but be directed substantially separatedly with microscler heater at least, heater is heated above the temperature of the fusing point of yarn, it is high 100 ℃ to 300 ℃ to can be compared to most fusing point, makes yarn bear the degree of pulling force to the plasticity bending that causes yarn.Although be subjected to low tension force at the drawing zone yarn, yarn forms accurate localization, and yield point also can be stretched fully.Because accurately the formation of the yield point of setting up before entering drawing zone, when partly making yarn loop, mills the yarn of advancing on guider, and this method further is improved.

The more favourable modification of this spinning method comprises with the speed that is higher than 500 meters/minute draws yarn from spinnerets, so that yarn is stretched, this has been disclosed among EP 0 539866A2.

The distinguishing characteristics of apparatus of the present invention is, although yarn speed is very high, the area of heating surface is very short, specifically, and in 300 to 1000mm scope.

Heater of the present invention can be taked the form of basic U-shaped body or U-shaped rail, and it defines a vertical area of heating surface in a groove, and yarn is subjected to guiding and does not contact with the area of heating surface.This structure can make simplified control, specifically, selects the yarn advance and the distance between the area of heating surface simply.In this embodiment, the function of the temperature of setting up as the material of yarn, fiber number (denier), filament number, yarn speed and the area of heating surface, this distance is scheduled to by thread-carrier.

Heater body or rail can have two separate type bodies, and this two body portion is with the relation location of end to the end, and they have temperature control equipment separately.Except that the sending to smoothly of yarn, present embodiment can be applicable to the substep temperature control of processing method especially.For example, the first step is controlled in 450 to 550 ℃ the temperature range, and second step was controlled in 400 to 500 ℃ the temperature range.

The present invention is applicable to all acid amides, polyester and poly-terephthalic acids trimethylene ester (PTT).In polyacrylic situation, temperature is correspondingly lower, preferably low 100 ℃ to 200 ℃.

A combination that is particularly conducive to process engineering of the present invention utilizes a narrow pipe that surrounds the spinning streamline at drawing zone, and the yarn of advancing from spinnerets enters the pipe and without deflector roll.This simple mechanical engineering technology scheme has only the present invention of having adopted just might be applicable to all material afterwards.When by the deflector roll that does not heat or similar device when yarn is drawn in the spinning district, the present invention and not requiring takes to reduce the special measure in the contraction tendency of the yarn of drawing zone.Therefore, can obtain extra adjusting possibility to change other character, particularly tensile strength and the elongation of yarn.Particularly can in continuous process, spin yarn height-oriented or that be orientated fully.

Can obtain important advantage from shrink process.The present invention can make so-called " package contraction ", that is, the tendency of cold contraction is reduced to harmless degree, or is eliminated, thereby can not be inclined to thermal contraction, that is, boil to boil and shrink or hot blast shrinks and has a negative impact.From the textile technology angle, regulate the thermal contraction tendency and do not need to require to adapt to reel, still to adapt to the requirement of the processing operation of back.Therefore, for example in the situation of sewing yarn, require certain contraction tendency, seam itself can be regulated to adapt to the contraction of fabric.When adopting socks to use yarn, obtain the shape of leg, undressed socks pipe is pulled through a flat board, by handling and shrinking, makes it be adapted to dull and stereotyped shape.In other fabric such as corduroy, contraction can make density increase.In all these situations, according to the present invention, to exempt from crinkle around the thermal contraction tendency no negative effect of requirement to prepare realizing.

Now contrast the following drawings and describe, further to illustrate above-mentioned purpose and advantage with other of the present invention.

Fig. 1 is the schematic diagram of the critical piece of spinning method of the present invention and device;

Fig. 2 a-2c represents an embodiment of the heater that the present invention uses;

Fig. 3 is a kind of improved spinning method of the present invention and schematic representation of apparatus;

Fig. 4 is the spinning method and the schematic representation of apparatus of the another kind of modification of the present invention;

Fig. 5 is the spinning method and the schematic representation of apparatus of the another kind of modification of the present invention;

Fig. 6 is the weaving techniques and the schematic representation of apparatus of the another kind of modification of the present invention.

Consult accompanying drawing now, Fig. 1 represents a kind of melt-spun device, and wherein, yarn 1 is spun into by a kind of thermoplastic.Thermoplastic is delivered to extruder 3 by hopper 2.Extruder 3 is driven by motor 4, and motor 4 is by control device 49 controls.In extruder 3, make the thermoplastic fusing.The work of deformation (shearing energy) that is applied on the material by extruder 3 helps melting process.In addition, also be provided with a heater, for example resistance heater 5, and it is by heating control apparatus 50 controls.Article one, fused mass pipeline 6 comprises and is used to measure melt pressure so that the control pressure of extruder 3 and the pressure sensor 7 of speed, and by pipeline 6, fused mass reaches a gear pump 9, and gear pump 9 is driven by pump motor 44.Pump motor 44 is controlled so that the speed of pump is done very meticulous adjusting by control device 45.Pump 9 is delivered to the spinning box 10 of heating with fused mass, and a spinnerets 11 is equipped with in its underpart.Fused mass sprays from spinnerets with the form of thin filament 12.Filament is advanced by cooling cylinder 15.In cooling cylinder 15, air-flow is laterally promptly radially blown over the zone of filament mouth, makes its cooling.

At the port of export of cooling cylinder 15, these filaments are in conjunction with forming yarn 1.Yarn is pulled out from cooling cylinder 15 and spinnerets 11 by deflector roll 54.Yarn is around deflector roll 54 several times that unroll.For this purpose, use a guide roller 55 that tilts with respect to deflector roll 54.Guide roller 55 can freely rotate.Deflector roll 54 with an adjustable in advance rotating speed by motor-driven.This is pulled out speed several times ground and is higher than the speed that sprays filament 12 from spinnerets naturally, therefore makes yarn bear very high tension force, causes its stretching.This stretching is subjected to the assistance of heating tube 20, and heating tube 20 defines a stretching thermal treatment zone 31.For example, heating tube 20 length are 1.150 meters.It is heated to a temperature, and this temperature is 140 ° to 180 ℃ for polyester and PTT, is 100 ° to 150 ℃ for polypropylene, is 140 ° to 220 ℃ for acid amides.The yield point of yarn is positioned at the entry zone of heating tube.The control of temperature in the further extension of heating tube make yarn character such as its intensity, boil to boil and shrink and extend adjusted.For example, this heating tube is corresponding to United States Patent (USP) the 4th, 902, No. 461 DE 38 08 854, and in DE 37 20 337, be described.

After the deflector roll 54 one second deflector roll 16 is arranged, it has a guide roller 17, yarn 1 coiled package 33 in up-coiler 30 then.

According to the present invention, between deflector roll 54 and 16, be provided with a heater 8.Heater 8 is a longitudinal bodies or rail, and yarn advances slightly separatedly along heater and its.Microscler heater is divided into several sections, that is, first thermal treatment zone 27 as shown in the figure and second thermal treatment zone 28, they are heated independently of each other, and this will be explained below.

From the deflector roll 16 of Fig. 1 or Fig. 3, yarn 1 advances to so-called " summit thread-carrier " 25 is then to the triangle 26 that traverses.The transversing mechanism that do not draw in the drawings, it comprises two opposite rotate, the blade that yarn 1 is moved back and forth on the length of package 33.When doing like this, yarn unrolls around the touch roll (not shown) in a yarn transversing mechanism downstream.Touch roll is against the surface of package 33, and it is used to measure the superficial velocity of package 33, and package 33 forms on a pipe 35.Pipe 35 is clamped on the wireline reel 34.Wireline reel 34 is driven by motor and control device, makes the superficial velocity of package 33 constant.For this purpose, and for as a changeable controller, the speed of touch roll free to rotate is monitored.

The transversing mechanism that should be noted in the discussion above that yarn also can be the cross-helicity roller of a standard, and a thread-carrier traverses in the cross-helicity groove.

In one embodiment, filament denier is that the polypropylene yarn of 0.7 to 3 dtex is spinned and pulled out from spinnerets 11 with the speed that is higher than 3500 meters/minute and 4500 meters/minute by deflector roll 54, and yarn is subjected to unexpected heating in heater 8.The peripheral speed of deflector roll 16 is not higher than the peripheral speed of deflector roll 54.Therefore, yarn is stretched, and is lax substantially when it passes through heater.In this embodiment, heating is worked being higher than under the very high-temperature of fusing point, that is to say to be significantly higher than 220 ℃.First district 27 of microscler heater is heated to 330 ℃, and second district 28 is heated to 150 ℃.This can be implemented in the sufficient relaxation processes between deflector roll 16 and 54, even is also continuing entering the winding zone.The temperature of first thermal treatment zone 27 is the temperature of a little higher than second thermal treatment zone 28 preferably, promptly is preferably in 250 ° to 350 ℃ the scope.The temperature of second thermal treatment zone 28 is preferably 150 ° to 450 ℃.Consider speed difference and convergent force, the yarn tension between deflector roll 54 and 16 is adjustable to less than 0.1cN/dtex.This scope is particularly advantageous for activating or eliminate cold contraction tendency.Particularly the control of the temperature in second district 28 also can be affected the tendency of thermal contraction in a controlled manner, thereby can negative effect be inclined to by harmful cold contraction of reeling.

As shown in Figure 3, in deflector roll 54 upstreams deflector roll 21 and guide roller 22 can be set.In this case, between the stretched present deflector roll 21 and 54 thereafter.For this reason, the speed of deflector roll 54 is regulated to such an extent that be higher than the speed of deflector roll 21.Applying tension force further is out of shape yarn 1.Further heat treatment preferably also takes place between these two deflector rolls.Be decorated with among Fig. 3 for this reason and the heater 24 of degree.This heater has the area of heating surface 29 in the face of yarn 1, and yarn 1 is along the area of heating surface 29, is not in contact with it but closely is adjacent to advance with it, and its spacing is 0.5 to 5mm.Surface temperature transfers to the fusing point that is higher than particular polymers.This after stretching and the unexpected heating that provides therein can realize influence to crystal structure, its meaning is the longer stability of yarn.Therefore, improved the effect between deflector roll 54 and 16, thereby further reduced package contraction and the tendency of the contraction in package in post processing.

It should be noted that others method shown in Figure 3 is corresponding to method shown in Figure 1.When adopting the method for Fig. 1 and 3, the soft package and to shrinking responsive especially hard yarn package of can reeling afterwards damages or harmful package that package destroys is shunk even also can not show to cause in its long-term use.When carrying out two kinds of methods, yarn is pulled out from spinnerets 11 with the very high speed that is higher than 3500 meters/minute, is by deflector roll 54 in the situation of Fig. 1, and is by deflector roll 21 in the situation of Fig. 3.In the situation of Fig. 3, stretching thereafter can reach another 10% to 30%.

Provide as the method for Fig. 3, the increase of the change of crystalline texture and length stability also can produce in method shown in Figure 1, heating tube 20 in the stretching thermal treatment zone 31 is substituted by a microscler surface, as shown in Figure 4, yarn is advanced along microscler surface and is not in contact with it, as contrast the description that Fig. 3 does, the temperature on surface is higher than the fusing point of polymer.Different with the situation of heating tube 20, necessary tensile force is not by windage, but the friction of yarn on thread-carrier 132 applies.Fig. 4 represents a kind of further change, when yarn enters drawing zone, walks around the thread-carrier 132 that several (among the figure being 2) are continued and arranged agley, therefore, because the result of its heating, the yield point of the yarn localization that becomes.

As substituting of method shown in Figure 1, Fig. 4 represents a modification of this method, and it is included in the heat treatment between deflector roll 16 and the up-coiler 30.In the shrink process district, yarn can be advanced under very little tension force, and this just can carry out a kind of adjusting, and the tension force of yarn is suitable for simultaneously as winding tension.Because method shown in the others of method and Fig. 1-3 is corresponding shown in the figure, thereby repeats no more here.

In the modification of as shown in Figure 5 this method, yarn 1 is not by deflector roll but pulls out from spinnerets 11 by up-coiler 30.In this case, the speed of pulling out be higher than 5000m/minute, be preferably 6000 to 7500 meters/minute.In this method, the stretching of yarn 1 and spinning while.More particularly, stretching is in the downstream near spinnerets 11, is taking place when the filament of heat and yarn are cooling off.It is little as can not to make on the point of yarn distortion of cooling and stop at the tension force that is provided by up-coiler 30 to stretch, and heater 8 is arranged on the downstream of stretching halt and the upstream of up-coiler 30.Therefore, in the heating process of heater 8, tension force that yarn bore and the yarn tension force when spinnerets is pulled out is basic identical.This method is specially adapted to produce easily for the extremely sensitive yarn of contraction that spins and drawing process causes.At least herein the part of the device of not describing as yet can be consulted the description to Fig. 1 and 3.

Fig. 6 represents a kind of method modification, it with method shown in Figure 4 there is no aspect the contraction heat processing different, here that method shown in Figure 4 is incorporated by reference.Filament 12 not by behind the thread-carrier 56 combination resultant yarns 1, yarn 1 is advanced to deflector roll 21.Drawn yarn around the deflector roll 21 of several times from spinnerets 11 by yarn 1, make yarn enter drawing zone.In drawing zone, heater 24 is arranged between deflector roll 21 and the deflector roll 54.Bearing when stretching, yarn 1 on the area of heating surface 29 closely but basic and its advance non-contiguously.The area of heating surface 29 is heated to a temperature that is higher than the fusing point of yarn 1.The required tension force that stretches is regulated between deflector roll 21 and 54.

It should be noted that in all situations, the deflector roll that has guide roller can be substituted by two or more driven vollers, these driven vollers, with S shape or Z-shaped holding that is, are successively held in the opposite direction by yarn.

This method confirms that particularly unexpected heat treatment at high temperature can make highly partially oriented polypropylene yarn restore simultaneously, therefore significantly reduces the residual shrinkage of yarn.In conventional method, the processing of exempting to contract promptly, is eliminated and is shunk tendency, is to reduce cold contraction tendency and thermal contraction tendency simultaneously, and steam treatment method particularly of the prior art comes to this.The present invention promptly, is provided with one and makes the yarn relax zone of heating suddenly, can eliminate cold contraction tendency selectively, and the thermal contraction tendency is affected in a controlled manner.

The deflector roll of pulling out, stretching and relaxing that should be pointed out that the polypropylene yarn that is useful in common method all is heated, and different therewith, deflector roll 54 does not heat, and equally also needn't add heated godet roll 16.

Two deflector rolls 54 or one of 16 also can heat then, for example, are heated to about 100 ℃, so that reduce the tendency of thermal contraction in a controlled manner equally.

The polymer that method of the present invention goes for standard is as poly-terephthalic acids ethylidene ester, poly-terephthalic acids trimethylene ester, polypropylene and acid amides (preferably PA6 and PA6.6, but also can be the PA mixture of dissimilar PA).Divide scope less than 3 polypropylene for molecular weight, particularly can obtain good effect for the type that with the metallocene is basis production, this is because which kind of spinning-extension that these yarns can use a heating tube to carry out exemplifying as Fig. 1, that is, in once-through operation and carry out spinning and stretching at the same area.

What should emphasize is to make yarn bear other steam treatment and can obtain favourable effect.The direct for this reason arrival end at heater 8 is provided with a vapours nozzle 23, to yarn spray feed steam.Vapours condenses on the yarn that does not heat as yet immediately, evaporates then.In condensation process, yarn is admitted corresponding heat.On the other hand, evaporation thereafter can prevent the too unexpected heating of yarn.It is favourable that this protectiveness to yarn is handled, and can cause the rapid minimizing of thermal contraction, and this can regulate by this processing.Unexpected heating at high temperature equally, subsequently can reduce cold contraction.But this favourable effect of the present invention seems and do not require uses above-mentioned vapours nozzle.

Shown in Fig. 2 a-2c, heater 8 is made of a longitudinal bodies or rail 114 (Fig. 2 c), is provided with two pods 112, is made by the material of heat-resisting and not scaling, can withstand long term exposure is higher than 450 ℃ temperature and does not change.The cross section of longitudinal bodies 114 takes the shape of the letter U substantially, comprises a flat substantially bottom 116, and it constitutes the area of heating surface 117.Three walls 118,120,122 link to each other with the bottom, form pod 112 therebetween.But, two or more upwardly extending walls also can be set on bottom 116, form the groove of respective number therebetween.For example, outer wall 118 and 122 can be fixed by bolts on the bottom 116. Wall 118 and 122 and bottom 116 directly be provided with a heating member 124,126, each heating member is preferably shaft-like resistor, extends on the whole length of longitudinal bodies 114, perhaps each heating member also can be divided into several portions on above-mentioned length, so that can control the distribution of heating.Heating member 124,126 is provided with plug shape contact (not shown), so that they are connected on the power supply.

The median wall 120 of the 116 vertical extensions from the bottom between outer wall 118 and 122 can be all-in-one-piece, also can be by being connected with bottom 116 with 122 identical modes to outer wall 118.

As a kind of replacement scheme, longitudinal bodies 114 can have a kind of shape of cross section, it is similar to bottom 116 and wall 118,120,122 the sort of extrusion shapes made in one piece, and is provided with groove, hole, flexible blade or similar structures in known manner, so that accommodate heating member.

Wall 118,120,122 is had in the groove or duct 128 of the basic identical degree of depth with certain spacing A insertion, and at the groove 128 that is provided with on the median wall 120 and spacing A of 128 biasings of the groove on sidewall 118 and 122, groove is cylindrical.Pod 122 prolongs a positive secant and groove 128 intersects, and makes wall 128,110,122 present a groove 133, that is, and and towards the rectangular aperture of axial groove 112.In the illustrated embodiment, groove extends perpendicular to the pod bottom, and its degree of depth is corresponding to the height of the wall 118,120,122 that accommodates them.It is comparatively favourable that groove is tilted.Every groove 128 holds a thread-carrier 132, and the shape of cross section of thread-carrier and size are corresponding to the shape and size of groove cross section.Thread-carrier is firm and gapped to be resisted against on the wall of groove, so that keep tolerance closely.

Gap between the wall of groove and the side face of thread-carrier, in the drawings for clarity, be that exaggeration is represented, the part of each thread-carrier 132 stretches in the axial groove 112 in the zone of every groove 133, therefore, surpass certain size of a central plane that extends in parallel with wall 118,120,122, for example 0.1-1mm at the thread-carrier 132 of the relative both sides of groove 112 arranged in succession.Perhaps the width of groove 133 is less than cross-sectional dimension, promptly less than the diameter of thread-carrier 132, makes it can not slippage from groove 128.

In the illustrated embodiment, groove 128 and thread-carrier 132 all have cylindrical cross-sectional shape, also can be other the shapes band angle and rounding, as, ellipse, rhombus, triangle etc.The cooperation of present embodiment between groove 128 and thread-carrier 132 remains in the tighter tolerances scope.Therefore, do not need other fastener thread-carrier to be fixed in case axially and radial displacement, thereby eliminated to the expense of fastener is set.The embodiment of Fig. 2 C also can have gap or interference fits.Above-mentioned cooperation wants enough tight on the one hand, so that thread-carrier immovably is installed in its groove.But on the other hand, above-mentioned cooperation should not selected tension yet, changes so that can easily thread-carrier be extracted from groove.For thread-carrier has fixedly been used the metallic plate cap in the axial direction.For this reason, sidewall 118,120,122 edge thereon is provided with a maintenance groove 154 or a head 156, and it is wider than corresponding wall.In cross-sectional figure, the metallic plate cap is cup-shaped, and therefore, in the situation of median wall 120, they deeply keep groove 154, and perhaps in the situation of sidewall 128,112, they cover the head 156 of wall.Perhaps, the metallic plate cap also can be made into microscler, and its length is corresponding to the length of the heater of yarn.The position of the thickness of the head 156 of wall and maintenance groove 154 and the corresponding size of metallic plate cap guarantee that the metallic plate cap is fixing in the axial direction with thread-carrier.Thread-carrier 132 is made as oxide or the nitride or the chromium-plated steel etc. of silicon, titanium or aluminium by for this purpose versatile material.

Protrude in the zone of groove 133 at thread-carrier 132, thread-carrier lean to with preferably becoming taper they facing to and leave on the end of bottom 116, shown in 134.This comes, the thread-carrier of being located at continuously between relative wall 118 and 120 or between wall 122 and 120 132 just forms V-shaped groove 136 respectively along the profile direction of heater 8, it guides yarn 138 under situation about stretching between the thread-carrier 132, significantly perpendicular to heating surface 112 and bottom 116 and move, between continuous thread-carrier 132, need not any auxiliary equipment.At this place, rest in yarn 138 on the contact-making surface just form one spiral enter the yarn path.

Several ends or other a plurality of somes place (seeing Fig. 2 a and 2c) at longitudinal bodies 114 equally are provided with spacer 140, its crossed slot 112 substantially at interval.These thread-carrier parts have yarn guiding surface up, and it makes yarn and bottom land keep a gap.These shaft-like spacers 140 are fastened in the cross-drilled hole of being located on wall 118,120 and 122.

Shown in Fig. 2 a, heater 8 can be made up of two longitudinal bodies part 114a and 114b, one and then one in the direction of the yarn that their direct motions are advanced.Though this two parts length difference, section shape is identical.The purpose of this bipartition is set, is to make heater 8 differently heating on the different part of length, be convenient to handle yarn 138 with the hot section that satisfies yarn property.Also can use more than part shown in two.Be provided with like this, the angle that two yarn heating parts form is each other regulated consistent extremely importantly spinning each processing stations of machine drawing, so that the yarn quality of producing at all processing stations is the same.These two yarn heating parts are installed will be used mounting support 158, its length is that two yarn heating parts are long.The mounting support section is a U-shaped.The yarn heating part is connected in the mounting support bottom by spacer 160.The size of spacer and limiting the gradient of heating part with respect to straight mounting support 158 with respect to the position of heating part.Be provided with like this, two heating part reversed dips form an obtuse angle each other.Like this, mounting support 158 is used for fixing specially two heating parts on the one hand.Because mounting support 158 sections are U-shaped, it is also around two heating parts.Therefore, mounting support 158 is also used so that the temperature constant at heating part strong point and wide place.The most handy heat guard of mounting support holds.

As described, can establish shaft-like spacer 140, it is crossed in axial groove 112 bottoms, that is, stride and extend through heating surface 117 and limiting into yarn path with bottom land from a specified distance.Substitute or extraly, can be several or all thread-carriers 132 set peripheral guide lug for example circumferential groove (see Fig. 2 a), the height that it is counted from bottom land, be spaced apart device 140 predetermined to advance yarn path height consistent.The yarn of advancing in groove in this way, is just guided by the horizontal edge of groove.Circumferential groove degree of depth on whole periphery is the same, that is, and and groove and thread-carrier 132 concentrics.But also can make circumferential groove in peripheral degree of depth difference, for example, bottom land is cut into annular, but with thread-carrier 132 off-centre.In the case, thread-carrier rotates, and just produces yarn 138 is contacted meticulous adjusting and forms the possibility that complications are entered the yarn path with thread-carrier 132.This can for example realize by a linkage (not shown) that connects each thread-carrier by rotating each thread-carrier 132 together to same degree.

Heater 8 is loaded in the insulated cabinet (not shown), wherein is embedded with heat-insulating material, for example glass fibre.Insulated cabinet can be with a valve, and this case is opened, be convenient to put into heater and the silk pass.In addition, insulated cabinet and its member are striden and were prolonged heater, so that axially tighten the thread-carrier 132 in the longitudinal bodies 114.For this purpose, groove is arranged on the insulated cabinet, it aligns with the central plane and the inclined-plane 134 of thread-carrier 132, also allows processed yarn 138 to insert or penetrate between the thread-carrier 132.On the sidewall of these grooves, is furnished with wear-resisting heat-insulating shield.

If need, heating member 124,126 used electric connectors can be contained in this insulated cabinet equally.

It may be noted that the periphery of yarn and thread-carrier contact position from all embodiment, size is relatively large.On the contrary, the tortuous pipeline that the yarn that continuous thread-carrier clinch U-shaped becomes is advanced is relatively littler than the big gap A of two adjacent thread-carriers.This makes the loop line angle of yarn loop line around thread-carrier or the contact-making surface on it, is little during total.

In the embodiment of Fig. 2 b, there are two grooves the heating track side facing to leaving axial groove 112 places, and it obviously stretches below guide tank 112. Heating member 124 and 126 inserts in these grooves.Heating member is mounted plate 159 fastenings, and the latter strides the whole length that extends through a heater.For this purpose, groove is arranged equally on the installing plate, it is holding heating member 124,126.Unclamp installing plate 159, heating member 124,126 can conveniently be replaced.

The distance of yarn and heating surface 117 is very little.This distance range is from 0.5mm to 5mm.Higher limit preferably is not more than 3.5mm, so that conduct heat satisfactorily, and accurately controls the fault-free temperature.Because all practicalities, lower limit is 0.5mm.Therefore, be higher than at the corresponding high temperature of heating track under 350 ℃ the situation, yarn bears unexpected heating.Thread-carrier also can have at least a part of left side to open, or thread-carrier is taken down, only otherwise produce negative effect just.On the one hand, thread-carrier is led yarn suitable, but advance when yarn yarn is heated; On the other hand, because the yarn clove hitch is little, thread-carrier only rubs slightly to yarn.But Tai Kaojin not add hyperthermal heating surface when importantly, yarn is advanced.

As a kind of replacement of heater 8 shown in Fig. 2 a-2c, for reducing to shrink the heater of tendency usefulness, can take the form of external heat pipe, the not obvious contact pipe of yarn of advancing by this pipe.This pipe can balancedly satisfactorily be controlled heat, also can slot so that yarn passes on the pipe.

Having shown each preferred embodiment of the present invention in accompanying drawing and explanation, though used some proprietary terms, only is usage general, narration, and unrestricted meaning.Scope of the present invention is stated in following claim.

Claims (34)

1. the spinning synthetic multi-filament yarn method comprises the following steps:

The polymerization fused mass is squeezed into some filaments of advancing, and these filaments are gathered the yarn that becomes advancing;

The yarn that stretching is being advanced;

Then, contiguous but have the travel path guiding at obvious interval at least and yarn that heating is being advanced with microscler heating surface the yarn of advancing along one, heating surface is by the temperature heating with the melt temperature that is higher than yarn, and the tension force deficiency that the yarn of advancing simultaneously bears is so that yarn generation plastic deformation;

Then, the yarn of advancing is wound into package.

2. the method for claim 1 is characterized in that: the temperature of heating surface than the melt temperature of yarn greater than about 100 ℃.

3. the method that defines as claim 1 is characterized in that: the temperature of heating surface on the melt temperature of yarn about 200 ℃ to 300 ℃.

4. the method for claim 1, it is characterized in that: the tension force that yarn bears in heating steps is not more than about 0.3cN/dtex.

5. the method for claim 1, it is characterized in that: the tension force that yarn bears in heating steps is between about 0.1 to 0.2cN/dtex.

6. the method for claim 1 is characterized in that: heating steps comprise by means of some along above-mentioned heating surface length and yarn that the guider guiding that separates each other is being advanced.

7. the method for claim 1 is characterized in that: heating steps comprises the yarn of advancing from the yarn feeding deflector roll above-mentioned heating steps that leads, and directly leads the coiling step then and do not contact another yarn feeding deflector roll.

8. the method for claim 1 is characterized in that: heating steps comprises guides a yarn of advancing to such an extent that contact with two yarn feeding deflector rolls that lay respectively at the heating surface two ends.

9. method as claimed in claim 8 is characterized in that: above-mentioned two yarn feeding deflector rolls do not heat.

10. the method for claim 1 is characterized in that: yarn is advanced from pressing steps toward the coiling step and is not contacted yarn feeding deflector roll and gait of march greater than the per minute 5000m.

11. the method for claim 1 is characterized in that: select one group that the polymerization fused mass is formed from polyester, acid amides and polypropylene.

12. the method for claim 1 comprises the another like this step of cooling off immediately after fiber is extruded, it is characterized in that: stretching step comprises makes the yarn of advancing heat this yarn by the not obvious again Contact Heating part of the heating member of drawing zone.

13. the method for claim 1, it is characterized in that: stretching step comprises the yarn of advancing adjacent with a microscler heating member but have at least the travel path at obvious interval to guide along one, heating member is heated to above the temperature of the melt temperature of yarn, and the tension force that the yarn of advancing simultaneously bears is enough to make the yarn plastic deformation.

14. method as claimed in claim 13 is characterized in that: above-mentioned heating member comprises a microscler heating surface; Its feature also is: stretching step comprises by means of some guiders that separate each other along the length of above-mentioned heating surface and guides the yarn of advancing.

15. the method for claim 1 is characterized in that: above-mentioned polymerization fused mass comprises polypropylene; Its feature also is: fiber pressing steps firm finish and cooling step in bear the tension force that is enough to make initial plastic deformation; Its feature also is: in stretching step, yarn stands plastic deformation afterwards.

16. the method for claim 1 is characterized in that: pressing steps comprises makes the polymerization fused mass extract fiber out with the speed greater than about per minute 5000m from this spinnerets simultaneously by a spinnerets; Its feature also is: downstream and while fiber that stretching step occurs in spinnerets are cooled; Its feature also is: stretching, it is low as can not to make on the point of the yarn distortion that is cooled to stop at tension force; Its feature also is: heating steps is executed on position, stretching halt downstream.

17. method as claimed in claim 16 is characterized in that: yarn bears the identical tension force of suffered tension force when extracting spinnerets out with fiber substantially in heating steps.

18. method as claimed in claim 17 is characterized in that: heating steps comprises guides the yarn of advancing to such an extent that contact with two deflector rolls that lay respectively on the reverse two ends of heating surface.

19. the spinning synthetic multi-filament yarn device comprises:

Be used for the polymerization fused mass is squeezed into some filaments of advancing, and these filaments gathered the device of the yarn that becomes advancing;

The device of the yarn of advancing is used to stretch;

Be positioned at the stretching device downstream and comprise the heater of a microscler heating surface, and the device that is used for the heating surface temperature is heated to above the melt temperature of yarn;

Be positioned at above-mentioned heater downstream in order to the yarn of advancing is wound into the coiler of package.

20. device as claimed in claim 19 is characterized in that: above-mentioned heater comprises some guiders contiguous with microscler heating surface along the yarn of advancing but that have at least the travel path at obvious interval to guide that are used for.

21. device as claimed in claim 19 is characterized in that: above-mentioned heater comprises the outside heated pipe that a suitable yarn passes and obviously do not contact with it.

22. device as claimed in claim 19 is characterized in that: above-mentioned stretching device comprises the heated godet roll that do not add of a downstream, and the tension force of the plastic deformation of yarn passes above-mentioned heater and advances thereby yarn bears deficiency.

23. device as claimed in claim 19 is characterized in that: above-mentioned heater comprises that a profile construction is generally the longitudinal bodies of U-shaped, so that limit a lengthwise heating tank, also comprises being used for this longitudinal bodies is guided and significantly contacted to yarn along this groove.

24. device as claimed in claim 23 is characterized in that: the above-mentioned longitudinal bodies of above-mentioned heater comprises that some passes are the longitudinal bodies part of a termination one end.

25. device as claimed in claim 24 is characterized in that: the each several part of above-mentioned longitudinal bodies position each other forms a obtuse angle when sidepiece is looked up; Its feature also is: guiding device comprise place above-mentioned longitudinal bodies each in abutting connection with the end, be used between the groove of longitudinal bodies each several part, guiding the guide that does not significantly contact the longitudinal bodies each several part again a yarn of advancing.

26. device as claimed in claim 19 is characterized in that: above-mentioned stretching device also comprises the pipe from external heat that suitable yarn is advanced and passed and don't obviously contact with it.

27. device as claimed in claim 19 is characterized in that: above-mentioned stretching device also comprise microscler heating surface the drawing zone heater, the yarn of advancing along one with microscler heating surface contiguous but have at least the travel path guiding at obvious interval device, the temperature of heater be heated to above the melt temperature of yarn device, be used for making the yarn of advancing to bear a yarn feeding roller (guide) apron of tension force that is enough to make the plastic deformation of yarn.

28. device as claimed in claim 27 is characterized in that: the device that is used to guide the yarn of advancing comprises some guides that separate each other along the length of above-mentioned heating surface.

29. device as claimed in claim 19 is characterized in that: do not have yarn feeding device between above-mentioned pressurizing unit and the above-mentioned stretching device.

30. device as claimed in claim 19, it is characterized in that: above-mentioned stretching device comprises one first yarn feeding deflector roll and second a yarn feeding deflector roll in the first yarn feeding deflector roll downstream, the drawing zone heater between above-mentioned first and second yarn feeding deflector roll, and the device that is used for driving with the superficial velocity greater than the first yarn feeding guide roller surface speed the second yarn feeding deflector roll.

31. device as claimed in claim 30 is characterized in that: above-mentioned stretching device also comprises the second drawing zone heater between pressurizing unit and the above-mentioned first yarn feeding deflector roll.

32. device as claimed in claim 30 is characterized in that: above-mentioned first and second yarn feeding deflector roll does not all heat.

33. device as claimed in claim 19 also comprises the yarn feeding deflector roll that does not heat at the two ends that two heating surfaces that are adjacent to above-mentioned heater are reverse respectively.

34. the spinning synthetic multi-filament yarn device comprises:

The polymerization fused mass of heat is squeezed into some filaments of advancing, and these filaments is assembled and are cooled to the device of the yarn of advancing;

Be positioned on the path of the yarn of advancing and comprise a microscler heating surface heater, be used for the yarn of advancing guide pass heater and don't with it obviously the guiding device of contact, be used for heating the temperature of heating surface to such an extent that be higher than the device of the melt temperature of yarn;

Be used to make yarn from pressurizing unit by above-mentioned heater with per minute at least the speed of 5000m advance and be used for the yarn of advancing is wound into the coiler device of package, thereby this coiler device is stretched to yarn to fiber of advancing and yarn and has been cooled to a certain degree and just stops stretching, wherein, heater is positioned at the downstream of stretching halt.

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