JP2003166114A - Melt spinning device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a melt spinning device solving unevenness in the fineness or dyeing of fiber yarns, generated by the wobbling of the yarns caused by air flow accompanying with the yarns traveling in a spinning cylinder, capable of setting a proper cooling or delayed-cooling condition freely for each of the individual spinnerets and doubling the yarns spun from the multiple number of spinnerets for making a mixed yarn. <P>SOLUTION: This melt spinning device (1) including spinnerets (2) for spinning a group of thermoplastic synthetic fiber yarns (Y) consisting of multifilaments spun from at least 2 spinnerets having different spinning conditions and spinning cylinders (3) for cooling or delayed-cooling the yarns (Y) spun from the spinnerets (2) is provided by rectifying the air flow accompanying with the yarns (Y) spun from the spinnerets (2), and also having partitioning plates (5) for partitioning the traveling zones (A, B, C, D) of each of the yarns (Y1, Y2) for each of the spinnerets. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a melt spinning apparatus for melt spinning a thermoplastic resin composed of polyethylene terephthalate, polyamide, polyolefin and the like.

[0002]

2. Description of the Related Art Generally, when melt-spinning a thermoplastic polymer such as polyester, polyamide or polyolefin, cooling air is blown to a spun yarn running in a spinning cylinder provided under a spinneret to cool the spun yarn. Is cooled and solidified. The spinning speed is also 300
High-speed spinning is generally performed in which spinning is performed at a high speed exceeding 0 m / min.

As the spinning speed becomes higher in this way, problems that were not so serious in the past, such as troubles due to the effect of the accompanying air current secondary to the running of the yarn, have increased. . Such a problem arises because the traveling speed of the yarn increases, so that the air flow associated with the traveling yarn increases, and the influence of the associated air flow cannot be ignored.

Further, in the past, in order to utilize the advantages of reduction of equipment cost and improvement of workability, spinning for multiple spindles has been performed. In such a case, the spun multi-thread yarn group is generally cooled and solidified in one spinning cylinder.

In a spinning cylinder in which such a multi-spindle (two or more spindles) spun yarn group runs, a side wall portion having a side wall and a central portion where such a side wall does not exist. Then, the state of the air flow accompanying each traveling yarn changes, respectively.

The reason for this is that there is a difference in the velocity of the air flow associated with the yarn running at high speed between the end portions where the side walls in the stationary state exist and the central portion where such side walls do not exist. Then, due to such a speed difference of the air flow, the air flow flowing inside the spinning tube is disturbed.

If such a turbulence of the air flow occurs,
This causes a problem that the running yarn causes a "thread shaking phenomenon", which induces fineness unevenness and dyeing unevenness between the filament groups that make up each yarn or between the end weights of the spinning cylinder and the center weight. To do.

Further, in recent years, a plurality of weight yarn groups having different fineness or cross-sectional shape of each filament of a spun yarn composed of multifilaments are spun at the same time, and the spun yarns are combined. Alternatively, spinning fiber mixing, which mixes fibers at the same time as joint investment, has become popular.

In this case, the spun yarns of each weight differ in the fineness, the number of filaments, the cross-sectional shape of the filaments, etc., and the accompanying air currents generated in the spun yarns of each weight differ accordingly. . In addition, naturally, it is necessary to set the spinning condition of each weight to the optimum condition corresponding to this.

Therefore, in response to such a condition,
The state of the associated airflow generated in the running yarn also differs for each weight, and not only the effect of the associated airflow at both ends of the spinning tube, but also the effect of the associated airflow between adjacent weights caused by the factors described above. The need to consider has arisen.

Not only that, but in the spinning fiber mixing technique, as described above, the fineness of the spun yarn, the number of filaments, the filament cross-sectional shape, etc. are different for each weight. Therefore, it is not desirable to set the cooling or delayed cooling conditions uniformly, and it is necessary to set the cooling and / or delayed cooling conditions corresponding to the spun yarns of the respective weights.

[0012]

SUMMARY OF THE INVENTION In view of the problems of the prior art described above, the problem to be solved by the present invention is a yarn caused by yarn sway caused by an accompanying air flow of a yarn traveling in a spinning tube. It is to eliminate the unevenness of fineness and the unevenness of dyeing.

Further, to provide a melt spinning apparatus capable of freely setting appropriate cooling and / or delayed cooling conditions suitable for each individual weight to the spun yarn group. is there.

As described above, the present invention is particularly preferably used as a melt-spinning apparatus for mixing yarns of yarns spun from a plurality of weights.

[0015]

According to the present invention for solving the above-mentioned problems, "spinning for spinning a thermoplastic synthetic fiber yarn group consisting of at least two multifilaments under different spinning conditions" is carried out. In a melt spinning apparatus including a spinneret group and a spinning cylinder for cooling and / or delay cooling a yarn group spun from the spinneret group, the air current accompanying the yarn group spun from the spinneret group is rectified. In addition, a melt spinning apparatus is provided, which has a partition plate for partitioning the traveling area of each yarn for each weight.

At this time, in the melt-spinning apparatus of the present invention, spinning conditions including spinning direction of cooling air for cooling the spun yarn or heating air for delayed cooling, air volume, temperature, and / or blowing pressure are spun. It is preferable to provide a cooling condition setting means for each yarn so that suitable spinning conditions can be individually set for each weight.

Further, the cooling condition setting means is composed of a rectifying member for rectifying the blowing air consisting of the cooling air or the heating air, or the amount of the blowing air consisting of the cooling air or the heating air. It is preferable that the air volume control member for controlling the air volume distribution is included so that stable spinning conditions can be provided for each spun yarn thread. At that time, the cooling condition setting means,
It is more preferable to include both the rectifying member and the air volume control member.

In the spinning blending technique for blending yarn groups of multiple weights having different physical properties, the cooling condition setting means further causes the heated wind to generate spun yarns of a specific weight. It is preferable to have a heating air generating means that heats the yarn of the specific weight and selectively delays and cools the yarn of the specific weight.

This is because, by doing so, the normally cooled filament group and the delayed cooled filament group can be mixed in the spun mixed yarn.

In the present invention, it is preferable that the yarn group spun from the spinneret group is used as a melt-spinning apparatus for spinning and mixing fibers, which is obtained by mixing and mixing fibers.

This is because by using the melt spinning apparatus of the present invention, preferable cooling and / or delayed cooling conditions can be set for each weight. Therefore, when a yarn group consisting of multifilaments that have undergone different cooling processes and / or delayed cooling processes is spun and mixed, the difference in physical properties such as elongation, strength, and boiling water shrinkage ratio between the spun mixed multifilaments. Is significantly generated, and it becomes possible to process in various applications by heat treatment, false twisting, etc. in the subsequent process.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings.

First, FIGS. 1 and 2 are explanatory views exemplifying a melt-spinning process of a thermoplastic polymer such as polyester and polyamide to which the melt-spinning apparatus of the present invention is applied. Here, FIG. 1 shows a schematic front view, and FIG. 2 shows a schematic side view. In addition, in these drawings, the embodiment in which the yarn group has two weights is illustrated.

In FIGS. 1 and 2 described above, reference numeral 1 indicates a melt spinning apparatus main body, and reference numeral Y indicates a yarn group composed of multifilaments. Further, reference numeral 2 is a spinneret group, reference numeral 3 is a single spinning cylinder, reference numeral 4 is a cooling device, reference numeral 5 is a partition plate, reference numeral 6 is an oil agent applying device, and reference numeral 7 is a mixed yarn mixed fiber. The apparatus, reference numerals 8 and 9 denote take-up rollers, and reference numeral 10 denotes a winder, respectively. In addition, reference numerals A and B indicate a yarn Y1 that runs in the spinning tube 3 partitioned by the partition plate 5, respectively.
And Y2 yarn running areas are shown respectively.

In the melt-spinning apparatus configured as described above, as illustrated in FIGS. 1 and 2, the two spinning yarn groups Y1 and Y2 are formed into the spinnerets 21 and 22 by the melt-spinning method and the apparatus according to the regular method. Are spun out from each. Each of the yarns Y1 and Y2 spun in this way is cooled by the cooling air blown from the cooling device 4 illustrated in FIG. 2 in the direction of the arrow in the drawing.

Further, on the downstream side of the cooling device 4, a heat treatment (not shown) provided as necessary for overheating the spun yarn in a non-focused state is passed to pass the oil agent applying device. 6
And the yarn group Y is applied by the compounding and mixing device 7
After 1 and Y2 are mixed and mixed, they are taken up by the take-up rollers 8 and 9 at a constant speed, and then the winder 10
Wound up by.

However, it is preferable that the heat treatment device (not shown) is attached to the downstream side of the cooling device 4 at a distance of 0.5 to 1.5 m from the spinneret 2, in which case the spinning cylinder 3 Can also be used as part of the heating device. The shape of this heat treatment device is
For example, a cylindrical heat treatment cylinder made of stainless steel having a length of 1.5 m and an inner diameter of 0.03 to 0.06 m can be preferably used.

At this time, as a means for heating this, a heat medium type heating device in which a heat medium is enclosed by surrounding the heat treatment cylinder with a heat medium jacket is preferably used. An electric heater may be used as the other heating means, but heating medium heating is preferable from the viewpoint of uniform heating and saving of energy consumption.

As the above-mentioned compound yarn mixing device 7, usually, the yarn groups Y1 and Y2 are compounded by the compound yarn guide by the compound yarn guide, and then the known compound fiber device utilizing compressed air. In general, a device is used in which compressed air is blown to the multifilaments of the combined yarn groups to open the fibers to mix them. A entanglement imparting device that imparts entanglement to the multifilament may be used as the mixed fiber device.

The take-up rollers 8 and 9 may or may not be heated. At this time, when used as a heating roller, the yarn group may be additionally drawn while being heated between the heating rollers, or may be heat-set. It is also possible to add a heating roller and perform a relaxation treatment to alleviate distortion at the spinning stage.

Although FIGS. 1 and 2 have described an example of a two-pile spinning mixed fiber using two multifilament yarns, for example, a three-ply, four-ply, and six-ply construction is possible. It goes without saying that it doesn't matter.

In the melt-spinning apparatus of the present invention, the spinning cylinder 3 is provided with running yarns 21 and 22 so that the yarns 21 and 22 are not affected by the surrounding wind when traveling in the traveling regions A and B. It is provided so as to surround the traveling areas A and B. At this time, in the traveling areas A and B of the spinning tube 3, when cooling the yarns Y1 and Y2 passing through the respective regions, the cooling air blown to the respective yarns Y1 or Y2 may interfere with each other. It is provided so that it does not exist.

Further, since the discharge amount and the number of discharge holes per hole are usually different from the polymer discharge hole group formed in each spinneret 21 or 22, the cooling air blown out from the cooling device 4 is blown out. If the conditions are the same, either yarn Y1 or Y2
However, it is difficult to select the optimum conditions for the other yarns Y2 or Y1. Therefore, the spun yarn Y1 or Y
It is necessary to set the cooling conditions for every two.

As means for setting the cooling conditions for each of the yarns Y1 or Y2, in the present invention, the cooling condition setting means shown by reference numerals 42 and 43 in FIG. 2 is used. Note that such cooling condition setting means 42
And 43, as shown in FIGS.
Mounted on top of.

Here, the cooling condition setting hands 42 and 43
As a specific example of the above, an air volume control member that equalizes the blowing pressure of the cooling air and controls the blowing air amount of the cooling air at the cooling air blowing port of the air blowing chamber 41 that sends the cooling air that constitutes a part of the cooling device 4. 42 and / or the flow regulating member 43.

The air volume control member 42 or the rectifying member 43 as described above is provided for each yarn traveling area A or B.
Each is provided. Therefore, for the yarn traveling area A, the air volume control member 42A and / or the flow regulating member 43A.
For the yarn traveling area B, the air volume control member 42B and / or the rectifying member 43B are provided.

As described above, by using the air volume control member 42, it becomes possible to evenly blow out the cooling air within the set range or to adjust the amount of air blown out. For the adjustment of the cooling air volume, the yarn Y1 or Y
It is also possible to give a constant distribution pattern to the blowing amount along the traveling direction of 2. Further, by providing the rectifying member 43, the direction of the cooling air to be blown can be made constant.

Here, specific examples of the air volume control member 42 described above include a woven or knitted plate made of metal or plastic, and a porous calcination having a gap through which cooling air can pass. Examples thereof include a bonded metal plate and a perforated plate having a large number of pores formed therein. Further, in that case, a combination of two or more of these may be used.

Further, as an example of the air volume control member 42,
A perforated plate can be used. For example, the air volume can be controlled to an arbitrary amount by changing the shape, the hole diameter, the hole pitch, the hole arrangement, the hole distribution, etc. of the holes formed in the perforated plate. At that time, the pressure condition of the blown cooling air may be set arbitrarily.

When a woven or knitted plate is used, the air volume can be controlled to an arbitrary amount by changing the woven structure or the knit structure, or by changing the basis weight or the opening. . When a porous sintered metal material is used, the air volume can be controlled to an arbitrary amount by changing the porosity, the average pore diameter, the basis weight and the like.

By using such a member, when the cooling air passes through this member, an appropriate pressure drop (pressure loss) can be given to the cooling air,
This has the effect that the blowing of the cooling air can be made uniform.

At that time, a large amount of cooling air is blown out on the upstream side and a small amount of cooling air is blown on the downstream side by grading the pressure drop of the cooling air passing through the air volume control member 42 along the yarn running direction. It is also possible to make a difference in the blowing amount of the cooling air, such as when blowing out.

Further, as a specific example of the rectifying member 43, a plurality of plates are vertically and horizontally arranged in parallel at a predetermined interval in multiple layers, or a deflecting plate is formed, or a flat plate is formed in a honeycomb shape or a lattice shape. Examples thereof include a deflection plate and the like, which are configured by combining them in a multiple manner. By thus providing the deflecting plate, the direction of the cooling air to be blown can be freely set.

At that time, as the blowing direction of the cooling air, the cooling air is blown on the upstream side in a direction substantially perpendicular to the yarn running direction,
It is also possible to control the blowing direction such that the cooling air gradually flows in parallel with the yarn traveling direction as it goes downstream.

In the present invention, as the cooling condition setting means, an electric heating means may be provided on a required weight so that the temperature of the cooling air can be controlled for each required weight. Because, by doing this, when the mixed yarn is mixed,
This is because a difference in physical properties between filament groups can be exhibited in the elongation and boiling water shrinkage of any of the filament groups that form the mixed fiber.

That is, the yarn spun under the normal cooling conditions and the yarn delayed-cooled by the cooling air heated by the electric heating means can be combined. When the thus-obtained mixed filament yarn is used as a woven fabric, a difference in physical properties such as boiling water shrinkage rate is caused by heat treatment in the subsequent step, or fibrils are obtained when alkali weight reduction processing is performed in the post processing. It is possible to obtain a woven fabric using the mixed yarn which is excellent in texture by giving physical properties such as easy to make.

Next, another embodiment of the present invention will be described in detail with reference to FIGS. 3 and 4 differ from the above-described two-thread spun yarn groups Y1 and Y2 in that the four-spun spun yarn groups Y1 to Y4 simultaneously run in one spinning cylinder 3. ing.

In this case, in terms of mixed yarn mixing,
When four yarn groups Y1 to Y4 are mixed together by the above-described compound yarn mixing device 7, and when four yarn groups Y1 to Y4 are mixed.
It is conceivable that 4 is divided into two groups of two weights, and that each of the divided two weight groups is subjected to mixed fiber mixing.

In the present invention, needless to say, all of these cases are included, but in the following description of the embodiments, only the latter case will be described, and in the former case, the number of weights is four. Only the number of weights is increased, which is substantially the same as in the case of two weights, and thus the description thereof is omitted. Therefore,
The yarns Y1 and Y2 and the yarns Y3 and Y4 are mixed and combined.

The specific description will be given below with reference to FIGS. 3 and 4, and the reference numerals used are the reference numerals of FIGS. 1 and 2 other than the reference numerals described below. It shall comply with the components. That is, the same reference numerals indicate essentially the same components in the melt spinning apparatus of the present invention.

However, the difference is that in the yarn group Y, the spinneret group 2, and the oil agent applying device group 6, the number of weights is 2.
It is related to the change from a weight to four weights. At that time, the number of the compound yarn mixing devices 7 to be installed is one when the yarn groups of four weights are mixed at one time, and when the yarn groups are divided into two groups of two yarns each. It goes without saying that one is required for each group. In these figures, only the main part is shown, and the components of the device downstream from the oil agent applying device 6 are not shown in order to avoid redundant description.

Further, in FIGS. 3 and 4, reference numerals A, B, C and D are yarn running regions in which the yarns Y1 to Y4 run, and the yarn running regions A to D
Is formed by partitioning the inside of the spinning tube 3 with partition plates 51 to 53 as illustrated in FIG. At this time, the two compound yarn mixed yarns are formed by a pair of yarn groups Y1 and Y2 and a pair of yarn groups Y3 and Y4, respectively.

Further, at that time, the groups of the yarn traveling areas A and C and the groups of the yarn traveling areas B and D are set to the same cooling condition in each group.
Therefore, the air volume control members 42A and 43C or the flow regulating members 43A and 43B provided in the yarn traveling areas A and C, respectively.
The attribute is determined so that the same cooling condition can be set. The air volume control members 42B and 42D provided in the yarn traveling areas B and D, or the rectifying member 4
The same applies to 3B and 43D.

Thus, as cooling condition setting means, partition plates 51 to 53, air volume control members 42A to 42D, rectifying members 43A to 43D, and if necessary, electric heating means (not shown) are provided. Thus, the physical properties of the spun yarns Y1 to Y46 can be freely changed for each weight.

As is clear from such an example, in the present invention, a case in which a yarn group Y having a large number of weights (four weights in this example) is simultaneously spun into one spinning tube 3 is shown. Even if there is, cooling or delayed cooling conditions can be set for each weight.

Therefore, the air flow associated with the yarn group Y traveling in the spinning tube 3 is rectified by the removable partition plate 5 installed between the weights, and the air flow associated with the adjacent yarns. Do not affect each other. Further, the cooling condition of the cooling air blown out from the air blowing chamber 41 of the cooling device 4 is set by the air flow rate control member 42 and the rectifying member 43 so that the air flow rate or the blowing direction is appropriate for each weight.

Here, the cooling conditions set in this way will be briefly described below with reference to FIG. 5. First, the partition plate 5 is, as described above, the cooling air blowing chamber. One purpose is to rectify the cooling air from 41 and the associated airflow.

In order to properly perform this straightening, the length H and the depth length L of the partition plate 5 in the yarn running direction are important (see FIG. 5). First, for the latter depth length L,
In order to rectify the accompanying flows that affect each other between the yarns of each weight, it is necessary to extend the yarns Y1 to Y4 made of multifilaments to a position that covers the traveling regions A to D in which they travel.

At this time, in order to prevent the entrainment of the cooling air that accompanies the traveling yarns of the adjacent other weights, the air blowing chamber 41 for blowing the cooling air to the position of the yarn group Y spun from the spinneret group 2.
L> L1 is more preferable, and L> 2 × L1 is more preferable.

Further, the length H of the former partition plate 5 is preferably at least a position at which the yarn group Y reaches a temperature at which it is cooled and solidified, and a heating device or the like is not provided directly below the cooling device. In this case, it is more preferable to install the yarn group Y right above the oil agent applying device 6 that applies the oil agent while concentrating the yarn group Y. The partition plate 5 is not described in detail, but the cooling air blowing surface of the cooling air blowing chamber 41 and the spinning tube 3 are not shown.
It is preferable to have a structure in which it is detachably fixed to any one of the cooling device 4 and the cooling device 4 by an engagement means such as a known bolt / nut or a clamp device.

As described above, since the partition plate 5 partitions the yarn traveling area of each weight, the influence of the cooling air controlled by the air volume control member 42 and the rectifying member 43 to the necessary cooling conditions is not affected. Since it does not reach the yarn groups of other weights being spun at the same time, it is possible to set an appropriate cooling condition only for the yarns of the necessary weight.

[0062]

According to the present invention described above, the following effects can be obtained. That is, when the yarn group is spun at high speed, the accompanying airflow generated in the yarn traveling at high speed can be rectified by the partition plate and the cooling condition can be set for each weight.

For this reason, the yarn sway of the running yarn caused by the turbulent air flow is not generated, and the cooling air is blown to the yarn spun from each spinneret spun under different conditions under appropriate conditions. It can be supplied, and a good yarn having no fineness unevenness or dyeing unevenness can be obtained.

In particular, two or more yarn groups having different properties with respect to the number of filaments, fineness, physical properties, etc. are spun from each spinneret into one spinning cylinder, and these yarn groups are spun mixed. When the melt spinning apparatus of the present invention is used in the melt spinning process for producing, a remarkable effect is exhibited.

The reason is that, in the spinning and mixing step, by applying the melt spinning apparatus of the present invention, the adjacent weights are not affected or influenced. Therefore, it is possible to arbitrarily set the proper cooling condition for each weight, and the difference in elongation between filaments,
It becomes possible to give a difference in physical properties such as strength difference and boiling water shrinkage rate for each weight.

[Brief description of drawings]

FIG. 1 is an explanatory view exemplifying a melt spinning process to which the melt spinning apparatus of the present invention is applied, and is a schematic front view.

FIG. 2 is an explanatory view exemplifying a melt spinning process to which the melt spinning apparatus of the present invention is applied, and is a schematic side view and schematic front view.

FIG. 3 is an explanatory view exemplifying a main part of a melt-spinning process for spinning and mixing a spun yarn group of four spindles, and is a schematic front view.

FIG. 4 is a schematic perspective view showing an example of installation of partition positions and cooling condition setting means of the present invention.

FIG. 5 is a schematic side view showing an installation example of a suitable partition plate in the spinning and spinning apparatus of the present invention.

[Explanation of symbols]

1 Melt spinning device body 2 Spinneret group 3 spinning tubes 4 Cooling device 42 Air volume control member 43 Rectifying member 5 partition boards A to D yarn traveling area Y yarn group

Claims (5)

[Claims] 1. A spinneret group for spinning a thermoplastic synthetic fiber yarn group consisting of at least two multifilaments under different spinning conditions, and cooling and / or delaying the yarn group spun from the spinneret group. In a melt spinning apparatus including a spinning cylinder to be cooled, it has a partition plate for rectifying an air flow associated with the yarn group spun from the spinneret group and partitioning a traveling region of each yarn for each weight. Characteristic melt spinning equipment. 2. A cooling condition setting means for setting, for each spun yarn, a spinning condition including a blowing direction, an air volume, a temperature, and / or a blowing pressure of cooling air for cooling the spun yarn or heating air for delayed cooling. The melt spinning apparatus according to claim 1, further comprising: 3. The cooling condition setting means for rectifying the blowing air made of the cooling air or the heating air, and / or the amount of the blowing air made of the cooling air or the heating air and its air flow distribution. The melt spinning apparatus according to claim 1 or 2, wherein the melt spinning apparatus is configured to include an air volume control member for controlling the flow rate. 4. The cooling condition setting means further comprises a heating air generation means for generating a heating air for selectively delaying and cooling the spun yarn of a specific weight. The melt spinning apparatus according to the above 1. 5. The melt-spinning apparatus for spinning and mixing fibers, wherein the melt-spinning apparatus mixes and mixes yarn groups spun from the spinneret group to obtain spun-mixed fibers. 4. The melt spinning apparatus according to any one of 4 above.