JP2003147671A - Continuous multifilament web-manufacturing apparatus and manufacturing method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a continuous multifilament web-manufacturing apparatus that can press the web on a conveyer uniformly in the cross direction for a long term. SOLUTION: The continuous multifilament web-manufacturing apparatus 1 is equipped with a precompaction roll unit 7 that has a metal-made upper face roll 8 that comes into contact with the continuous multifilament tow web 3 on the conveyer, a metal-made lower face roll 9 arranged so that it may be supported on the upper face roll 8 through the conveyer and a back-up roll 10 partially made of an elastomer and arranged so that it may support the lower face roll 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a continuous multifilament web manufacturing apparatus and method for collecting opened multifilament to form a continuous multifilament web.

[0002]

2. Description of the Related Art Conventionally, a method of collecting an opened yarn group to form a continuous web has been known in Japanese Patent Publication No. 37-4993. The web of the obtained continuous yarn group is made into a nonwoven fabric by entwining or adhering the yarns in a suitable manner. The non-woven fabric thus obtained exhibits high tensile strength and high tear strength extremely efficiently and inexpensively, and is widely used in various fields of application.

However, there are many technical problems in order to stably manufacture the above-mentioned nonwoven fabric. As one of them, there is stabilization of running of the web, in which the yarn is just collected by opening and is stably run in order to stably carry it to the next step, for example, the bonding step.

A very slight entanglement was formed between the yarns of the web obtained by collecting the opened continuous yarn group on the conveyor having the net-like belt, and it was merely laminated. Is. Therefore, the web on the conveyor has poor morphological stability, and when trying to travel and convey on the conveyor,
The yarn of the web was upside down due to the surrounding airflow generated by the running, and when it was raised, the web was curled up. Even if a non-woven fabric is formed by entanglement or adhesion in such a state, there is a problem that its quality and physical properties are inferior.

On the other hand, in Japanese Examined Patent Publication No. 53-37450, in the step of collecting and collecting the web on the surface of the net-shaped belt, the web immediately after the accumulation is heated from above the belt while applying suction force from below the belt surface. The method of pressing with a steel roll is proposed. According to the proposed method, the web is pressed by the steel roll while being sucked from below the belt surface, so that the shape is stabilized.

However, the above-mentioned method has a problem that the belt is deformed, which easily causes pressure unevenness. Therefore, JP-A-6-108356 discloses a method in which a rubber roll is installed below a heated steel roll via a belt.

[0007]

However, with the above-mentioned structure, the rubber roll is always in direct contact with the net belt, so that there is a problem that it is worn out in a short time and cannot be put to practical use. The belt may be made of plastic or metal, and especially when the belt made of metal is used, the wear of rubber is rapidly progressing.
When the rubber wears in this way, the wear rarely progresses uniformly in the width direction, and a part of the wear progresses. When that happens,
Since the belt is deformed in the width direction, it is necessary to replace the rubber roll.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a multifilament web manufacturing apparatus and a manufacturing method capable of uniformly pressing the web on the conveyor in the width direction for a long period of time.

[0009]

An apparatus for producing a continuous multifilament web according to claim 1, wherein the upper surface roll is made of metal and is in contact with the continuous multifilament web on a conveyor, and the upper surface roll is supported via the conveyor. It is characterized by having a pre-compaction roll unit provided with a metal-made lower surface roll that is movably arranged and a backup roller that is arranged so as to support the lower surface roll and at least the surface of which is made of an elastic body.

According to the above structure, since the upper surface roll that comes into contact with the continuous multifilament web on the conveyor of the precompaction roll unit and the lower surface roll that is arranged to be supported by the upper surface roll via the conveyor are made of metal, Very little wear occurs. Therefore, the upper surface roll and the lower surface roll maintain the same mechanical strength for a long period of time, and the web on the belt can be uniformly pressed in the width direction.

Further, since a backup roll at least having an elastic surface is disposed below the lower roll of the pre-compaction roll unit so as to support the lower roll, it is possible to suppress the bending of the lower roll in the belt width direction. it can. Further, since the lower surface roll can have a cushioning effect, even if the conveyor is made of plastic, it is hardly damaged. Therefore, the web on the conveyor can be pressed uniformly in the width direction for a long period of time.

The continuous multifilament web manufacturing apparatus according to claim 2 is the continuous multifilament web manufacturing apparatus according to claim 1, wherein the backup roll is provided at two positions in the lower portion of the lower surface roll in the traveling direction of the conveyor and in the width direction of the conveyor. The feature is that they are provided separately.

According to the above construction, the backup roll is provided below the lower roll at two positions in the traveling direction of the conveyor, divided in the width direction of the belt.
By providing each of the backup rolls divided in the width direction of the conveyor with supporting strength, the lower roll can be efficiently supported with a simple structure. Further, when the surface pressure of a part of the lower surface roll becomes high, the pressing force of the lower surface roll to the net-shaped belt is adjusted so as to be uniform in the belt width direction by moving the backup roll of the part. be able to. Further, the area occupied by the backup roll in the width direction of the belt is reduced, so that when air is sucked from below, the suction effect can be efficiently obtained.

According to a third aspect of the present invention, there is provided the non-woven fabric conveyor apparatus according to the first or second aspect, wherein the diameter of the lower surface roll is smaller than the diameter of the upper surface roll.

According to the above structure, since the diameter of the lower roll is smaller than that of the upper roll, the area occupied by the lower roll in plan view can be reduced, and when air is sucked from below, The suction effect can be efficiently obtained. The diameter of the lower surface roll may be a diameter that can support the lower surface roll and does not bend in the width direction of the belt, and is preferably 100 mm to 200 mm.

In the continuous multifilament web manufacturing method according to claim 4, the continuous multifilament web on the conveyor is sandwiched between a metal upper surface roll and a metal lower surface roll via the conveyor, and the lower surface roll is formed. Is elastically supported at least on the surface by a backup roll made of an elastic material, and the pressing force in the width direction of the conveyor is adjusted uniformly.

According to the above construction, since the upper roll for pressing the continuous multifilament web and the lower roll for sandwiching the continuous multifilament web with the lower roll via the conveyor are made of metal, almost no wear occurs. There is no. Therefore, the upper surface roll and the lower surface roll maintain the same mechanical strength for a long period of time, and the web on the belt can be uniformly pressed in the width direction.

Further, since the lower surface roll is elastically supported by the backup roll, it is possible to suppress the bending of the lower surface roll in the belt width direction. Further, since the lower surface roll can have a cushioning effect, even if the conveyor is made of plastic, it is hardly damaged. Therefore, the web on the conveyor can be pressed uniformly in the width direction for a long period of time.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to FIGS. In FIG. 1, a continuous multifilament web manufacturing apparatus 1 includes a yarn drawing device 12 for drawing and drawing the yarn group 2 from the spinning nozzle 11 below a spinning nozzle 11 from which the yarn group 2 is spun.
Are arranged. Then, below the yarn drawing device 12, a conveyor for collecting and conveying the yarn group 2 from the yarn drawing device 12 is arranged.

The above conveyor includes a mesh belt 4 made of plastic and a suction mechanism 6 arranged on the lower surface of the belt 4. The suction mechanism 6 is provided on the lower surface of the belt 4 below the yarn drawing device 12. The suction mechanism 6
The yarn group 2 blown out from the yarn drawing device 12 is sucked, and the web 3 is stuck on the belt 4. still,
The belt 4 is not limited to being made of plastic and may be made of metal.

The precompaction roll unit 7 is
It is arranged downstream of the yarn drawing device 12. The pre-compaction roll unit 7 is provided inside the suction mechanism 6, and the pre-compaction roll unit 7 is provided.
Is sucked in from below. The pre-compaction roll unit 7 is provided in contact with the upper surface roll 8 via the belt 4 and a metal upper surface roll 8 connected to a driving device (not shown) provided in contact with the upper surface of the belt 4. And a backup roll 10 whose surface is made of rubber.

Since the upper roll 8 and the lower roll 9 are made of metal, they hardly wear. Top roll 8
The lower roll 9 and the lower roll 9 maintain the same mechanical strength for a long period of time, and can press the web 3 on the belt 4 uniformly in the width direction. Therefore, even if the belt is made of plastic, it will not be deformed by the upper roll 8 and the lower roll 9.

Further, since the surface of the backup roll 10 is made of rubber, the lower roll 9 can have a cushioning effect, and the belt 4 sandwiched between the upper roll 8 and the lower roll 9 made of metal is made of plastic. However, damage due to wear can be prevented.
Therefore, the web 3 on the net-shaped belt 4 can be uniformly pressed in the width direction for a long term by the pre-compaction roll unit 7.

The upper roll 8 is heated and presses the web 3 from above while rotating in synchronization with the belt 4 by a drive motor (not shown) installed at the shaft end.
As a result, the web 3 is bonded and entangled, and not only the yarn group 2 is deposited but also an integrated state. The lower roll 9 has a smaller diameter than the upper roll 8.

Since the diameter of the lower roll 9 is smaller than that of the upper roll 8 as described above, the area occupied by the lower roll 9 in a plane can be reduced, and the suction effect of the suction mechanism 6 can be efficiently achieved. Obtainable. In addition, the lower surface roll 9
The diameter of the belt 4 can support the upper surface roll 8 and
100m as long as it does not bend in the width direction of
It is preferably from m to 200 mm.

The backup roll 10 is the lower roll 9
The lower part of the lower surface roll 9 is disposed at two positions in the traveling direction of the conveyor 4 below the lower surface roll, and supports the lower surface roll 9. The backup roll 10 is provided separately in the width direction of the belt 4. At this time, the backup roll 10
May be appropriately arranged in the width direction of the belt 4 so that the lower surface roll 9 supports without bending. The backup roll 10 is a roll made of metal with a rubber lining.

By providing each of the backup rolls 10 divided in the width direction of the belt 4 described above with a supporting strength, the lower roll 9 can be efficiently supported with a simple structure. Further, when the surface pressure of the lower surface roll 9 becomes non-uniform, the pressing force of the lower surface roll 9 to the net-shaped belt 4 is made uniform in the width direction of the belt 4 by moving the backup roller 10 in that portion. Can be adjusted as Furthermore, since the area occupied by the backup roll 10 in the width direction of the belt 4 is reduced, the suction effect of the suction mechanism 6 can be efficiently obtained.

FIG. 2 shows an example of a form in which the backup roll 10 is installed. Backup roll 10
The backup roll unit 20 is formed by the bearing portion 25 on which the rotating shaft of FIG. The backup roll unit 20 includes a support frame 21 provided in the width direction of the belt 4,
It is erected on a support frame 22 provided in the rotation axis direction of the lower surface roll 9. The backup roll unit 20 can be appropriately arranged and fixed by moving it in the width direction of the belt 4. The backup roll 10 should just be arrange | positioned so that the lower surface roll 9 may be supported without bending.

The continuous multifilament web manufacturing apparatus 1 of this embodiment is constructed as described above. Hereinafter, the operation of the continuous multifilament web manufacturing apparatus 1 will be described.

In FIG. 1, a large number of continuous yarns are spun from a spinning nozzle 11 to form a yarn group 2. The yarn group 2 spun from the spinning nozzle 11 is a yarn drawing device 1
2 is drawn, drawn inside the yarn drawing device 12, and then blown downward.

The yarn group 2 blown out from the yarn drawing device 12
Is collected as the web 3 on the belt 4 while being sucked by the suction mechanism 6 provided on the conveyor, and is transported and conveyed. At this time, the web 3 on the belt 4 is pressed by the pre-compaction roll unit 7 while being sucked by the suction mechanism 6.

At this time, the web 3 is pressed from above by the heated metal upper surface roll 8. The metal lower surface roll 9 supports this pressing from below. At this time, since the lower surface roll 9 is supported by the backup roll 10 having a rubber lining on the surface of the metal roll, the cushion effect hardly damages the plastic belt 4. Also, the upper surface roll 8
Since the lower surface roll 9 supports the web 3 and the belt 4 when pressing them from above, the belt 4 can be prevented from being deformed.

As shown above, the web 3 on the belt 4 which is heated and pressed by the upper surface roll 8 is conveyed and conveyed on the conveyor 1 and sent to the next step.

The embodiment is not limited to the above, but the following modifications may be made. (1) According to the precompaction roll unit of the present invention, the web on the conveyor can be pressed uniformly in the width direction for a long term. However, since the surface of the backup roll is made of rubber, abrasion may occur over time. For such a case, it is possible to adjust the extrusion amount of each backup roll according to the amount of bending of the lower roll. Then, the above-mentioned wear often occurs in the backup roll arranged near the center in the width direction of the conveyor, but it can be adjusted even if any portion is bent.

For example, by connecting the jack-up device to each backup roll, the extrusion amount of the backup roll can be adjusted. The amount of extrusion may be adjusted mechanically or manually. Further, a shim may be inserted in the lower portion of the bearing portion of the backup roll, and the extrusion amount of the backup roll may be adjusted by changing the thickness of the shim.

(2) The form of supporting the backup roll is such that the area occupied in the plane is small to the extent that air suction from below is not hindered and the lower roll can be supported without bending. However, any form may be used.

(3) The yarn group to be collected may be one that is opened and collected on the conveyor. For example, after the yarn discharged from the circular nozzle has been bundled to some extent, it is drawn and spun at a high speed by a circular air gun, then charged and charged, and the electrostatic repulsive force and the impact plate are used to form the yarn bundle. It may be opened, or may be one in which a yarn bundle once spun and wound up is opened using a repulsive force of static electricity due to electrostatic charge imparting or a collision plate. .

[0038]

The present invention will be described below with reference to examples.
The present invention is not limited to these examples.

(Example 1) In the precompaction roll unit shown in the embodiment, the upper roll was a steel pipe having a diameter of 350 mm, and the lower roll was a steel pipe having a diameter of 175 mm and a barrel length of 3550 mm. Then, the backup roll is a steel pipe having a diameter of 86 mm and a rubber lining having a thickness of 7 mm, which has a roll barrel length of 100 mm in the belt width direction, and 250 mm in the belt width direction.
A total of 14 pitches were arranged in 2 rows of 7 pitches per row. A maximum load surface pressure of 10 (kg / cm) was applied to the pre-compaction roll unit from above. At this time, almost no bending occurred in the width direction of the lower roll. Moreover, even when no load was applied, almost no bending occurred.

A non-woven fabric was produced by a continuous multifilament producing apparatus using this precompaction roll unit. The web is uniformly pre-compacted in the width direction and it is possible to produce a web of uniform quality without wrapping the web on the upper roll or inversion.
The web was successfully conveyed and conveyed.

(Embodiment 2) In addition to Embodiment 1, an eccentric ring is further incorporated in the backup roll so that the width 7
Two rows were made by passing a single common shaft through a backup roll of pcs / row. The amount of eccentricity of the eccentric ring was increased on the backup roll at the center and decreased as it went to the backup roll at the end. By driving the hydraulic motor installed at one shaft end of the common shaft and making the extrusion amount of the backup roll variable, the extrusion amount of the backup roll at the center is made larger than the extrusion amount of the backup roll at the end. I was able to do things. A nonwoven fabric was manufactured with a continuous multifilament manufacturing apparatus using this precompaction roll unit.

In Example 1, the rubber lining portion on the surface of the backup roll may be unevenly worn in the width direction of the conveyor if it is used for a long time.
In this case, the one arranged at the center in the width direction of the conveyor was often worn more than the one arranged at the end. According to the present embodiment, when such a state is reached, the extrusion amount of the backup roll in the central portion is set to the extrusion amount of the end backup roll by driving the hydraulic motor and changing the eccentric amount of the backup roll. By making it larger than the above, even if the backup roll is worn, the lower roll is supported evenly in the width direction, and the web can be transported and conveyed without winding the web around the upper roll or inversion. I was able to do well.

(Embodiment 3) In this embodiment, in addition to Embodiment 1, an eccentric ring is used as a backup roll, and the eccentricity of each backup roll is manually operated to make uniform contact in the width direction. Thus, the extrusion amount of the backup roll was adjusted. A non-woven fabric was manufactured with a non-woven fabric manufacturing apparatus using this pre-compaction roll unit.

In the first embodiment, the rubber lining portion on the surface of the backup roll may be unevenly worn in the width direction of the conveyor if it is used for a long time.
According to this embodiment, by adjusting the extrusion amount of the backup roll according to the state of wear, the lower roll is evenly supported in the width direction even when the backup roll is worn, and the upper roll of the web is not supported. The web was satisfactorily transported and conveyed without causing winding or upside down.

(Embodiment 4) In addition to Embodiment 1, by further inserting a shim in the lower part of the backup roll bearing box and changing the thickness of the shim, the backup roll is extruded so as to make uniform contact in the width direction. The amount was adjusted. A non-woven fabric was manufactured with a non-woven fabric manufacturing apparatus using this pre-compaction roll unit.

In Example 1, there was a case where the rubber lining portion on the surface of the backup roll was worn unevenly in the width direction of the conveyor when it was used for a long time.
According to the present embodiment, by adjusting the extrusion amount of the backup roll according to the state of wear, the lower roll is evenly supported in the width direction even when the backup roll is worn, and the upper roll of the web is supported. It was possible to satisfactorily carry and convey the web without causing the winding and the upside down.

(Comparative Example 1) As a pre-compaction roll unit, a steel pipe having a diameter of 350 mm was used for the upper roll, a steel pipe having a diameter of 330 mm and a roll barrel length of 3550 mm was used for the lower roll, and 10 was provided outside the steel pipe.
A tube with a rubber lining having a thickness of mm was used. No backup roll is installed. At the central part of the lower roll where the largest deflection occurs, the maximum load surface pressure of 10 (kg / c
The difference in bending between when (m) was applied and when no load was applied was about 0.5 mm.

(Comparative Example 2) As a pre-compaction roll unit of a conventional conveyor device, a steel pipe having a diameter of 105 mm and a roll barrel length of 3550 mm was used as the lower roll, and a rubber lining having a thickness of 10 mm was applied to the outer surface of the lower roll. Used tubes were used. At the central part of the lower roll where the largest deflection occurs, the maximum load surface pressure of 10 (kg / c
The difference in the flexure between when (m) was applied and when no load was applied was several mm or more.

In Comparative Examples 1 and 2, the amount of deflection of the upper surface roll was changed depending on the operating conditions, and it was not always possible to support with a uniform surface pressure in the width direction of the conveyor regardless of the operating conditions. Therefore, depending on the operating conditions, the web may be wound around the upper surface roll or upside down, and the web may not be satisfactorily conveyed and conveyed. Further, the surface pressure became non-uniform in the width direction of the conveyor, and the rubber lining portion of the lower surface roll was apt to be worn from a portion having a high surface pressure. Therefore, the replacement cycle of the lower surface roll is shortened and the running cost is increased. For example, a roll crown may be attached to the upper or lower roll to correct the deflection, but the operating range that can be adjusted is limited and is not an essential solution.

According to Example 1, in the pre-compaction roll unit according to the present invention, almost no bending occurred even when no load was applied and even when a maximum load was applied, but according to Comparative Example 1, depending on operating conditions. A difference of about 0.5 mm occurred, and according to Comparative Example 2, a difference of several mm or more occurred. Therefore, according to the present invention, it can be said that the belt can be uniformly supported in the width direction.

[0051]

According to the first aspect of the present invention, the upper roll that abuts the continuous multifilament web on the conveyor of the precompaction roll unit, and the lower roll that is supported by the upper roll via the conveyor are made of metal. Therefore, wear hardly occurs. Therefore, the upper surface roll and the lower surface roll maintain the same mechanical strength for a long period of time, and the web on the belt can be uniformly pressed in the width direction.

Further, since a backup roll at least having an elastic surface is disposed below the lower roll of the pre-compaction roll unit so as to support the lower roll, it is possible to suppress the bending of the lower roll in the belt width direction. it can. Further, since the lower surface roll can have a cushioning effect, even if the conveyor is made of plastic, it is hardly damaged. Therefore, the web on the conveyor can be pressed uniformly in the width direction for a long period of time. Since the backup roll having the surface rubber lining so as to support the lower roll is disposed below the lower roll of the pre-compaction roll unit, the bending of the lower roll in the belt width direction can be suppressed.

According to the second aspect of the present invention, since the backup rolls are provided at the lower two portions of the lower surface roll so as to be divided in the width direction of the belt, the backup rolls divided in the width direction of the belt respectively have a supporting strength. By providing the lower roll, it is possible to efficiently support the lower surface roll with a simple configuration. Further, when the surface pressure of a part of the lower surface roll becomes high, the pressing force of the lower surface roll to the net-shaped belt is adjusted so as to be uniform in the belt width direction by moving the backup roll of the part. be able to. Further, the area occupied by the backup roll in the width direction of the belt is reduced, so that when air is sucked from below, the suction effect can be efficiently obtained.

According to the third aspect of the present invention, since the diameter of the lower roll is smaller than the diameter of the upper roll, the area occupied by the lower roll in a plane can be reduced and air is sucked from below. The suction effect can be efficiently obtained.

According to the invention of claim 4, since the upper roll for pressing the upper continuous multifilament web and the lower roll for sandwiching the continuous multifilament web with the lower roll via the conveyor are made of metal, almost no wear occurs. It never happens. Therefore, the upper surface roll and the lower surface roll maintain the same mechanical strength for a long period of time, and the web on the belt can be uniformly pressed in the width direction.

Further, since the lower roll is elastically supported by the backup roll, it is possible to suppress the bending of the lower roll in the belt width direction. Further, since the lower surface roll can have a cushioning effect, even if the conveyor is made of plastic, it is hardly damaged. Therefore, the web on the conveyor can be pressed uniformly in the width direction for a long period of time.

[Brief description of drawings]

FIG. 1 is a schematic diagram when a conveyor device according to the present invention is used.

FIG. 2 is an enlarged view of a portion where a backup roll is installed.

[Explanation of symbols]

1 Continuous multifilament web manufacturing equipment 2 yarn groups 3 Web 4 belts 6 Suction mechanism 7 Pre-compaction roll unit 8 Top roll 9 Bottom roll 10 backup roll 11 spinning nozzles 12 Thread drawing device

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Shigeru Yamamoto             1-3-18 Wakihama-cho, Chuo-ku, Kobe-shi, Hyogo               Kobe Steel, Ltd. Kobe Head Office F-term (reference) 4L047 AA13 AA19 AB03 BA08 BB00                       EA05 EA10

Claims (4)

[Claims] 1. An upper surface roll made of metal that abuts a continuous multifilament web on a conveyor, a lower surface roll made of metal that is supported by the upper surface roll via the conveyor, and a lower surface roll. A continuous multi-filament web manufacturing apparatus comprising a pre-compaction roll unit provided with a backup roll made of an elastic material at least on the surface. 2. The backup roll is provided in a lower portion of the lower roll at two locations in the traveling direction of the conveyor, divided in the width direction of the conveyor. Continuous multifilament web manufacturing equipment. 3. The diameter of the lower surface roll is smaller than the diameter of the upper surface roll.
An apparatus for producing a continuous multifilament web according to. 4. A continuous multifilament web on a conveyor is sandwiched between a metal upper roll and a metal lower roll via the conveyor, and the lower roll is elasticized by a backup roll having at least a surface made of an elastic material. The method for producing a continuous multi-filament web is characterized in that the pressing force in the width direction of the conveyor is adjusted uniformly by uniformly supporting it.