JP2000238710A - Method and device for packaging hollow yarn bundle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and a device to enclose a hollow yarn bundle in a film tube which surrounds the bundle. SOLUTION: In a method wherein a film tube is formed by winding a film web on a hollow yarn bundle, and the film tube is cut into a specified length, and also, the films are combined to each other, the film web is wound around the hollow yarn bundle, and the film web continuously has a first section, a second section and a third section, and in addition, the hollow yarn bundle is surrounded in the second section, and the first section and the third section are overlapped, and are made to face the directions separating from the hollow yarn bundle. Further, the first section and the third section are combined with each other in the vicinity of the hollow yarn bundle to form one combined section, and are cut at a position of the combined section when seen from the hollow yarn bundle, or behind the combined section.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method for wrapping a hollow fiber bundle in a film tube surrounding the hollow fiber bundle.
The present invention relates to a method of winding a film web around a bundle of hollow fibers to form a film tube, cutting the film tube into a predetermined length, and bonding the films to each other, and an apparatus for performing the method.

[0002] The invention further provides a table plate, a device for feeding a film web and a device for joining a film web in a device for carrying out the method according to any one of claims 1 to 8. And a device for wrapping a hollow fiber bundle having a device for cutting a film web.

[0003]

2. Description of the Related Art As is known, a hollow fiber bundle is a bundle of hollow fibers which may contain other fibers, and is used for oxygen and / or heat exchange. The hollow fibers of this bundle are very unstable to mechanical loads. In order to provide a limited total area of the hollow fiber for a given oxygen and / or heat exchange, the number of hollow fibers must be precisely determined in the bundle. Such a bundle of hollow fibers is used in a changer. The hollow fiber bundle is wrapped and protected in a film for transporting the hollow fiber bundle from a manufacturing location to a use location in an exchange. In this case, the film forms a tube in which the hollow fiber bundle is located. This film tube is usually open at the end face and loosely surrounds the hollow fiber bundle, so that the hollow fiber bundle is removed from the tube through both end faces of the film tube so that the hollow fiber bundle can be easily removed. Can be pushed out.

[0004] The wrapping of the hollow fiber bundle is usually carried out as follows: the film web is unwound, the hollow fiber bundle is placed on the film web and wound into a sheet web to form a sheet tube. Usually, a welding method is used to combine the films into a film tube, in which case the heat required for welding the film is not hollow, avoiding reaching the hollow fibers of the hollow fiber bundle. Damage to the yarn must be avoided. Weld the film so that the welding device is fed parallel to the axis of the hollow fiber bundle and perpendicular to the formed film tube,
The weld seam thereby forms with the film layer located below the weld seam when viewed from the outside. In order to avoid excessive heating of the hollow fibers located near the weld seam to be formed, the hollow fiber bundle requires at least another predetermined length of film. In extreme cases, several hollow fibers may be welded together to the weld seam. In that case, the film must be wound around the hollow fiber bundle in several layers to obtain at least one layer adjacent to the hollow fiber bundle that is not welded to another layer located outside. Such a layer must be present in a number that avoids excessive heat penetration into the hollow fibers. This demonstrates that welding can only be performed after the film has been wound onto the hollow fiber bundle in at least three layers. A similar problem arises when gluing the film to form a tube because individual hollow fibers should be avoided from adhering to the film. Other joining methods, such as suturing, are excluded for economic reasons.

[0005] The above-described method for surrounding a hollow fiber bundle has a number of disadvantages. For example, when wrapping a hollow fiber bundle in a film, it is unavoidable that individual hollow fibers exist between the film layers, making it difficult to take out the hollow fiber bundle later. Instead, such a hollow fiber may be damaged. Furthermore, a large amount of film is required for the required multilayer winding, which makes the enclosure extremely expensive. Furthermore, the final adjustment of the bundle of hollow fibers wrapped by the multilayer winding of the film becomes difficult. This is because, with each layer of the film, the appearance of the hollow fiber bundle becomes increasingly obscure with these layers, even in the case of a transparent film.

[0006]

The object of the invention is therefore to provide a technique as described at the outset which can be implemented simply and economically and in which the aforementioned disadvantages are at least reduced. . It is also an object of the present invention to provide a device capable of performing the method of the present invention.

[0007]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a hollow fiber for winding a film web around a bundle of hollow fibers to form a film tube, cutting the film tube into a predetermined length, and connecting the films to each other. The problem is solved by wrapping the hollow fiber bundle in a film tube surrounding the bundle, wherein the film web is wound around the hollow fiber bundle and the film web is continuously divided into a first section and a second section. And a third section, wherein the hollow fiber bundle is surrounded by the second section, and the first section and the third section overlap with each other so as to face away from the hollow fiber bundle, and Division and third
The segments are joined together near the hollow fiber bundle to form a joint, and the first and third segments are cut off at or behind the joint as viewed from the hollow fiber bundle. It is characterized by doing.

In this way, the first section and the third section can be kept relatively short, and only a little more film is required than when a single layer is wound around the hollow fiber bundle. In the method of the present invention, the first section and the third section are combined after the first section and the third section are overlapped by winding the second section of the film relatively loosely around the hollow fiber bundle. The position to be used can be given a certain distance to the adjacent hollow fiber. By this and by the fact that the coupling can no longer be carried out on the hollow fiber bundle, but on a plane along the axis of the hollow fiber bundle, but outside the hollow fiber bundle, The method can use any number of joining methods, such as welding, gluing, suturing, stapling, clamping, and the like.

According to the method of the present invention, a plurality of hollow fiber bundles can be wrapped in a single film. In this case, in the sense of the present invention, a formed product composed of a plurality of hollow fiber bundles is also regarded as a hollow fiber bundle.

In the context of the present invention, the concept of a film includes all the plane formations suitable for enclosing a bundle of hollow fibers. Most simply, the film may be made of paper.
However, it may also consist of a dense mesh net, textile or knit or the like. The film advantageously comprises a thin film whose material is preferably a thermoplastic polymer.

The film web is unrolled, a recess is formed in the film web to form a second section, a hollow fiber bundle is placed in the recess, and a recess is formed in the tube containing the hollow fiber bundle, thereby forming a tube. Forms the second section of the film web, and when the first section and the third section are combined, the method of the invention can be carried out particularly simply. In this way, the hollow fiber bundles to be wrapped are treated particularly carefully.

In order that the method of the present invention can be carried out by an automatic apparatus, the film web is spread along a table consisting of two parts, a first table plate and a second table plate, and the first table plate and the second table plate are spread. /
Alternatively, the second table plates are brought close to each other until a predetermined interval is formed, to provide a gap at least as large as or larger than the diameter of the hollow fiber bundle to be surrounded, and to surround the film in this gap. It is recommended that recesses be created by immersion at a depth at least as large as or deeper than the desired hollow fiber bundle.

In this case, in order to form a tube, the first table plate and / or the second table plate are moved in a direction approaching each other, and are wider than twice the thickness of the film but larger than the diameter of the hollow fiber bundle. Also creates a narrow gap, after which a first and / or third section of the film is separated by a predetermined distance until the second section forming the recess loosely surrounds the hollow fiber bundle and forms a tube. This is particularly advantageous when guiding only in the direction away from the gap. This ensures that the completed wrapping, in which the first section and the third section are joined together, loosens the bundle of hollow fibers but does not allow the wrapped bundle of hollow fibers to easily slip out of the enclosure during further processing. It is guaranteed to be narrowly surrounded.

[0014] The connection between the first and third sections of the film is formed by means of a connection device arranged at the table edge on the gap side of the first and second table plates. In some cases, this can be done advantageously.

The first section and the third section are used to form a joint.
When the sections are welded to one another, the method according to the invention can be carried out particularly simply and cost-effectively.

[0016] In this case, the first section and the third section can advantageously be cut during welding, so that welding and cutting can be performed simultaneously. At the same time, welding processes for cutting certain parts from the film are well known and need not be described in further detail.

It is an object of the invention to carry out the method according to the invention, comprising a table plate, a device for feeding the film web, a device for joining the film web and a device for cutting the film web. Wherein the device has two table plates, wherein the first and / or second table plates are provided with a gap formed between the first and second table plates. In order to vary the width, it is possible to move in a first movement plane for the first table plate and / or in a second movement plane for the second table plate in directions approaching and moving away from each other. A second table plate disposed adjacent to the apparatus for supplying the film web And said that you are.

In this apparatus, first, the gap between the first table plate and the second table plate is adjusted to be approximately wider than the diameter of the hollow fiber bundle to be wrapped by feeding the movably arranged table plate, This makes it possible in a simple manner to form a recess in the gap by pushing the film downward, and then to sink the hollow fiber bundle into the recess. Subsequently, when the movable table plates are moved in directions approaching each other, a recess can be simultaneously formed in the tube and the first and third sections of the film can be overlapped.

Above the first table plate and the second table plate, a punch movable in a predetermined plane is arranged to form a recess, and the plane is defined by the first and / or second plane of movement. The recess can advantageously be formed when it has an angle of between 90 ° and 60 ° and extends at least approximately at the center of the gap formed by the first table plate and the second table plate. it can.

An advantageous embodiment of the device according to the invention is characterized in that the device for feeding the film web comprises a stepper motor. The film can be fed along both table plates on the one hand using a stepping motor, after which a recess is formed and the hollow fiber bundle is surrounded. However, it can also be used to pull back a third section of the film after the two table plates have been fitted, again to the extent that the film conforms to the contour of the hollow fiber bundle and at the same time loosely surrounds the hollow fiber bundle. .

In this case, it is particularly advantageous if the first table plate has a device for holding the film web. Using this device, the first section can be fixed while the third section is pulled back via a stepper motor to form a tube.

Devices in which the device for joining the film webs is a welding device should be regarded as particularly advantageous.

It is particularly advantageous if the welding device is a device for cutting a film web.

[0024]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.

To carry out the method of the present invention, FIGS.
Use the equipment as shown in The film 1 is transferred from the film roll 7 via a stepping motor (not shown) connecting the film 1 to transport rollers 4 and 4 '.
Are the first table plate 2 and the second table plate 3
, And send it in the direction of arrow A. The direction of rotation of the transport roller 4 is indicated by arrow B. The first table plate and the second table plate 3 are mutually arranged at a predetermined interval that is approximately larger than the diameter of the hollow fiber bundle to be surrounded. A punch 5 having a contour corresponding to the contour of the hollow fiber bundle to be surrounded is arranged on the gap generated by the distance between the first table plate 2 and the second table plate 3. The hollow fiber bundle is not shown in FIGS. 1 and 2 since a hollow fiber bundle is only needed after this.

The punch 5 is moved downward so that the film forms a second section which is located below the table plate 2 and the table plate 3 and becomes a recess 8 as shown in FIG. . The recess can be formed by first moving the support 6 downward in the direction of arrow D so that the first section 1 of the film is fixed. Subsequently, the retainer 6 is lowered, and a film capable of forming a concave portion in the punch 5 is supplied later through a stepping motor.

Here, the hollow fiber bundle 9 is introduced into the concave portion, and then the punch 5 is pulled back to the starting position shown in FIG. Thereafter, the movably arranged table plate 2 is moved in the direction of arrow E, and thus the second table plate 3
, So that a narrow gap is still formed between the first table plate 2 and the second table plate 3 (see FIG. 3). This gap is due to the 2
It is slightly wider than twice the thickness, so that the film can be pulled further through the gap, but the hollow fiber bundle 9 introduced into the recess 8 'cannot be pulled.

Here, the film is loosened in the direction of the roll 7 (arrow G) via the transport rollers 4, 4 ′ (rotation direction of arrow F), the film is loose in the second section 8 ″ ′, Pull back by the amount that winds around the hollow fiber bundle along the contour.

For the welding, the first table plate 2 which is movably arranged here is guided further in the direction approaching the second table plate 3 (FIG. 5), with the edges being welded by a welding device. (Not shown), the welding device is designed to cut the first section 1 and the third section 1 'of the film simultaneously with the welding of the film. Briefly, the welding device is a welding wire which is integrated into the table edge of the first table plate or the second table plate and which can be heated for example by electric current for welding.

From the second section of the film, a tube 8 "" surrounding the hollow fiber bundle 9 was formed by welding. This film tube has a welding seam running along the contour parallel to the axis of the hollow fiber bundle, and at the portion of the welding seam, both ends of the film forming the tube are aligned and the direction away from the hollow fiber bundle is changed. Oriented and mutually welded.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a first process of one embodiment of the present invention.

FIG. 2 is a schematic diagram showing a second process of one embodiment of the present invention.

FIG. 3 is a schematic diagram showing a third process of one embodiment of the present invention.

FIG. 4 is a schematic diagram showing a fourth process of one embodiment of the present invention.

FIG. 5 is a schematic view showing a fifth process of one embodiment of the present invention.

[Explanation of symbols]

1 film, 2 first table plate, 3 second table plate, 4 transport roller, 5 punch,
6 cage, 7 film roll, 8 recess, 9
Hollow fiber bundle

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[Procedure amendment]

[Submission date] February 29, 2000 (200.2.2
9)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claim 14

[Correction method] Change

[Correction contents]

Claims (14)

[Claims] 1. A method for wrapping a hollow fiber bundle in a film tube surrounding the hollow fiber bundle, wherein the film web is wound around the hollow fiber bundle to form a film tube, and cut into predetermined lengths. And in a method of bonding the films to each other, winding the film web around a hollow fiber bundle, wherein the film web is continuously in a first section,
It has a second section and a third section, and the hollow fiber bundle has a second section.
The first section and the third section are overlapped by the section and are directed in a direction away from the hollow fiber bundle;
Furthermore, the first section and the third section are connected to each other in the vicinity of the hollow fiber bundle to form a joint, and the first section is viewed from the hollow fiber bundle at the joint or behind the joint. And the third
A method for wrapping a hollow fiber bundle, characterized by cutting a section. 2. A film web is developed, a concave portion for forming a second section is formed in the film web, a hollow fiber bundle is inserted into the concave portion, and the concave portion is formed into a tube having a hollow fiber bundle. The method of claim 1 wherein the tube forms a second section of the film web and the first section is joined to the third section. 3. The film web is spread along a table composed of two parts, a first table plate and a second table plate, and the first table plate and / or the second table plate are formed with a predetermined interval therebetween. To form a gap which is at least as large as or larger than the diameter of the hollow fiber bundle to be surrounded and which is at least as large as the diameter of the hollow fiber bundle to be surrounded. 3. The method of claim 2, wherein the recess is created by immersing the film to a depth greater than or equal to. 4. To form a tube, the first table plate and / or the second table plate are moved in the direction of approaching each other so that they are larger than twice the thickness of the film but the diameter of the hollow fiber bundle. Forming a smaller gap, after which a first section and / or a third section of the film loosely surrounds the hollow fiber bundle with a second section forming a recess,
4. The method according to claim 3, wherein the guiding is performed in a direction away from the gap by a predetermined distance until a tube is formed. 5. The joining portion between the first section and the third section of the film is formed by using a joining device arranged on the table edge on the gap side of the first table plate and the second table plate. Item 5. The method according to item 3 or 4. 6. The method according to claim 1, wherein the first section and the third section are welded together to produce the joint. 7. The method of claim 6, wherein the first section and the third section are cut during welding. 8. The method according to claim 6, wherein the welding and the cutting are performed simultaneously. 9. The method according to claim 1, comprising a table plate, a device for feeding the film web, a device for joining the film web, and a device for cutting the film web. In an apparatus for performing the method, the apparatus has two table plates, wherein a first table plate and / or a second table plate is formed between the first table plate and the second table plate. In a predetermined first movement plane for the first table plate and / or in a predetermined second movement plane for the second table plate in directions approaching and moving away from each other in order to change the width of the gap to be made And a second table plate is positioned adjacent to the apparatus for supplying the film web. A device for wrapping a hollow fiber bundle in a film tube surrounding the hollow fiber bundle. 10. A punch that is movable along a predetermined plane for forming a recess is disposed above the first table plate and the second table plate, and the plane is formed of a first movement plane and a first movement plane. 9 for the second plane of motion
The apparatus of claim 9, having an angle between 0 ° and 60 ° and extending through at least approximately the center of the gap formed by at least the first and second table plates. 11. The apparatus according to claim 9, wherein the device for supplying the film web has a stepping motor.
An apparatus according to claim 1. 12. The method according to claim 9, wherein the first table plate has a device for holding the film web.
The device according to any one of the preceding claims. 13. The method according to claim 9, wherein the device for joining the film webs is a welding device.
The device according to item. 14. The method according to claim 13, wherein the welding device is also a device for cutting a film web.