JP4766768B2 - Collector screen belt - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a collector screen belt used in various non-woven fabric manufacturing apparatuses and used for collecting, collecting and conveying fiber aggregates.
[0002]
[Prior art]
Conventionally, plastic woven fabrics have been adopted for collector screen belts used in various nonwoven fabric manufacturing apparatuses such as spunbond nonwoven fabrics and melt blown nonwoven fabrics because of their excellent lightness and durability. For example, in the case of a collector screen belt used in a spunbond nonwoven fabric production device, a plastic fabric body is woven with synthetic warps and wefts, and joints are provided at both ends of the end plastic fabric body. The parts are connected and used as endless. Moreover, as these joint structures, the weft is removed from both ends of the end-shaped plastic fabric body, and the hook-shaped warp exposed by removing the weft is folded back, and a part thereof is appropriately formed into a loop shape, A warp loop in which a warp loop end is woven into the plastic fabric body, the warp loops formed at both ends of the plastic fabric body are engaged with each other, and a connecting core wire is inserted into and connected to the warp loop common hole formed by the engagement. A spiral wire made of synthetic resin monofilament is meshed with a seam structure joint or the warp loop, and a spiral wire fixing core wire is inserted into a common hole formed by meshing, and formed at both ends of a plastic fabric body. The spiral wires are meshed with each other, and the connecting core wire is inserted into the spiral wire common hole formed by meshing. Spiral seam construction joint that is commonly used.
[0003]
[Problems to be solved by the invention]
However, in the conventional joint structure, the gap in the joint portion is larger than the gap in the plastic fabric main body portion, and the air permeability in the thickness direction of the joint portion is increased, so that the collector is used to collect the fiber aggregate. By suction by a suction device or the like provided on the lower side of the screen belt, a part of the fiber aggregate collected especially on the joint portion is easily sucked from the gap portion of the joint portion, and the fiber is fed to the joint portion. Process troubles such as adhesion were regarded as problems. In order to avoid such a process trouble, an attempt has been made to reduce the air permeability of the joint portion by inserting a plurality of core wires into the common space portion in the weft direction of the conventional joint portion. In reality, it was impossible to reduce the degree. In addition, when a collector screen belt is put on a spunbond nonwoven fabric manufacturing apparatus, a lot of labor and time are required for the joining operation for bringing both end portions of the belt together to form an endless belt. Furthermore, when the plurality of core wires are additionally inserted, there is a disadvantage that more labor and time are consumed.
[0004]
In view of the above-mentioned problems, the present inventors intend to provide a collector screen belt that has no fiber adhesion trouble to the joint portion and that can be easily joined.
[0005]
[Means for Solving the Problems]
The collector screen belt of the present invention is a collector screen belt for collecting and transporting fiber aggregates on the surface of an endless plastic woven fabric, and is mutually locked at both ends of the plastic woven fabric body. A coiled fastener element array made of a single synthetic resin wire having a stretchability, which is molded in advance, is attached by being entangled with a wrap loop of a warp constituting the plastic fabric body, and the coiled fastener element arrays at both ends are attached to each other. And the collector screen belt having a coil fastener joint that is joined endlessly by inserting a joining core wire into the common hole formed by meshing. That is, by using the coil fastener joint, the air permeability of the joint portion is compared with the air permeability of the plastic woven fabric body, and by trying to equalize or lower the air permeability, an attempt is made to prevent fiber adhesion to the joint portion. At the same time, the use of a coil fastener is intended to facilitate the insertion.
[0006]
Moreover, it is preferable that the coiled fastener element row is attached to the plastic fabric body in a state where the coiled fastener element row extends within a range of about 1 to 25% with respect to a reference length dimension at the time of molding. The element color of the coiled fastener element array is preferably a translucent color. The joining core wire is preferably a stranded wire formed by twisting a plurality of monofilaments.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
The collector screen belt of the present invention will be described below in detail based on the illustrated embodiment.
[0008]
FIG. 1 shows a side view of a coil fastener joint portion of the collector screen belt of the present invention. FIG. 2 shows a plan view of a coiled fastener element array during molding. FIG. 3 shows a side view of the coiled fastener element array of FIG. 2 as viewed from the meshing head side. FIG. 4 is a perspective view of a coil fastener joint forming slider that meshes coiled fastener element rows from above and below.
[0009]
As shown in FIG. 1, the collector screen belt (1) having the coil fastener joint of the present invention has a stretchability preliminarily molded to be mutually locked at both ends of the plastic fabric body (2). A coiled fastener element array (3) (hereinafter simply referred to as this element array) made of a single synthetic resin wire is stretched within a range of about 1 to 25% of the reference length dimension at the time of molding, Installed by entwining the loop (5) of the warp yarn (4) that constitutes the woven fabric body, meshing the element rows at both ends from above and below, and connecting them into the common hole (6) formed by meshing (7) is a collector screen belt that is endlessly formed by a coil fastener joint that is inserted and joined endlessly. Similar to general warp loop seam structure joints and spiral seam structure joints, both ends of the plastic fabric are joined and held with a joining core wire. Coupling structure that has the effect that the air permeability in the thickness direction at the joint portion is equal to or lower than the air permeability of the plastic woven fabric main body by having a coil fastener joint made of It can be Because of having such a joint structure and action, the collector screen belt of the present invention can be a collector screen belt having no trouble of fiber adhesion to the joint portion.
[0010]
In addition, the collector screen belt of the present invention can be easily meshed with each other from above and below by the slider (8) at the time of actual joint joining. Joining and separating can be a joint that is remarkably superior in labor and time.
[0011]
In addition, when the element row is attached to a plastic fabric, an interference fit that has a joining strength as a fastener for holding and holding a general two-sided base fabric is not so important. It is only necessary to secure a common hole through which the joining core wires are inserted after meshing with each other to such an extent that the meshing is not released by a slight external force. That is, in the present invention, in order to maintain a strong interference fit between the element rows as in the prior art, the warp density of the plastic fabric is not adjusted according to the coil density of the element rows, By extending the element row in the axial direction, the coil density of the element row is adjusted in accordance with the warp density of the plastic fabric. By taking such joint forming means, collector screens for manufacturing a wide variety of non-woven fabrics. It can be adapted as a belt and can be a joint that can easily mesh the element rows from above and below.
[0012]
The extension range is preferably extended in the range of about 1 to 25% with respect to the reference length dimension at the time of molding of the element row. Here, the reference length dimension at the time of molding refers to a predetermined reference in the axial direction in a state where no external force is applied to the element array made of a single synthetic resin wire material having a stretchability that has been molded in advance to mutually lock. The length dimension. If the elongation exceeds 25%, not only the joining strength between the element rows becomes too weak, but also the shape maintenance and durability of the element rows themselves become inferior, making them unsuitable as joint members. Further, the gap in the joint portion becomes large, which is not preferable. On the contrary, if the elongation rate is less than 1%, the warp density of the plastic woven fabric body is likely to be limited, and at the same time, when the element rows are meshed from above and below, it is difficult to mesh and lock. More preferably, it is preferable to extend within a range of 5 to 20%.
[0013]
For example, as shown in FIG. 5, a coil fastener element array (3) is used by joining a coil fastener element array (3) to the end of a cloth tape (10) having a low rigidity. When locking each other with the joint-forming slider, the meshing heads (3h) of the coiled fastener element rows in a Y-shape from both the left and right directions on the same plane are as if the teeth of the spur gears are It is locked by a joint-engaging slider (11) of a lateral meshing type that meshes as if meshing. However, when the coiled fastener element array is directly attached to a highly rigid plastic fabric without using a cloth-like tape as in the present invention, the coiled fastener is formed in a Y shape from the left and right directions on the same plane. As the mesh heads of the element rows engage with each other as if the spur gears engage with each other, the higher the rigidity of the fabric, the more difficult it is to engage. Therefore, the meshing head is formed from the vertical direction, but when the element rows are meshed from the vertical direction, the mesh head formed by the element row is configured by increasing the axial extension rate of the element rows. The distance between the elements becomes wider, and the meshing head (3h) of one element row can be easily inserted into the meshing space (3d) of the other element row. Accordingly, the elongation ratio is preferably as large as possible in terms of meshing between the element rows. On the other hand, the bonding strength between the element rows until the core wire for bonding is inserted (here, tensile strength at both ends of the plastic fabric). In this respect, the greater the elongation rate, the weaker the joint strength and the larger the gap in the joint. Therefore, it is more preferable that the elongation rate is expanded by 1 to 25% with respect to the reference length dimension at the time of this element row molding. More preferably, it is 5 to 20%.
[0014]
For example, this element row forms a meshing head that bulges in the transverse direction of the monofilament by pressing a portion corresponding to the meshing head molding portion of the monofilament after coil molding of a known synthetic resin monofilament Alternatively, it can be obtained by previously molding the meshing head of the above-mentioned form at predetermined intervals of the synthetic resin monofilament and then coil-molding the monofilament later. This element array is not specially molded, but is molded according to the same standard as the coiled fastener element array used for coil fasteners that are normally used for clothing, bags, etc. Applicable. For example, a polyester monofilament having a wire diameter of 0.6 mm is molded into a coiled fastener element array having a coil density of 21 (number of meshing heads / inch), and a polyester monofilament having a wire diameter of 0.8 mm having a coil density of 16 (number of meshing heads / inch). Preferred are those molded into a coiled fastener element array, polyester monofilaments with a wire diameter of 1.1 mm, molded into a coiled fastener element array with a coil density of 11.5 (number of meshing heads / inch), and the like. In the present invention, taking the coiled fastener element array as an example, for example, for a double woven plastic fabric having a warp density of 70 (lines / inch), a coiled fastener having a coil density of 21 (number of meshing heads / inch) is used. The element row is elongated by about 20%, and a warp loop is formed for every four warp yarns of the plastic fabric. The warp loop and the coiled fastener element row are connected to a coiled fastener element row (3 ) And the fixing core wire (12) are entangled and attached at the same time, the mutual density of the warp loop density and the coil density becomes equal, and a coil fastener joint that does not have any problem in meshing of the element rows is obtained. It is done. Similarly, for a double-woven plastic fabric having a warp density of 60 (lines / inch), a coiled fastener element array having a coil density of 15.8 (number of meshing heads / inch) is elongated by about 5.3%. A warp loop is formed for every four warps, and the warp loop and the coiled fastener element array are entangled and attached, so that the warp loop density and the coil density are equal to each other, and the element arrays are engaged with each other. A coil fastener joint with no problems can be obtained. In order to match the coil density of the element row to the warp loop density, the element row is extended within the above numerical limit range, so that it can be used as a joint structure for a wide variety of collector screen belts. A joint that can be easily engaged and locked from the direction can be obtained.
[0015]
In order to mesh the element rows from above and below, a joint forming slider for meshing in the vertical direction may be used. For example, as shown in FIG. 4, on the front end vertical surface of the slider, one side of the coiled fastener element row at both ends is inserted into one open opening, and the other side is inserted into the other element row. Open insertion ports are formed, and each insertion port has an element row engagement region which is a region shifted in the vertical direction on the vertical surface of the front end and partially overlapped in the horizontal direction. Both end open common outlets having the same region in the vertical direction and the horizontal direction are formed on the end vertical surface, and each coiled fastener element array inserted from the insertion port is provided on the vertical surfaces on the left and right side ends of the slider. A carp provided with a pressure lock for forming a guide guide groove having a continuous horizontally long hole for guiding to a common outlet and for engaging the coiled element rows with each other. Fuasuna joint forming slider is preferred.
[0016]
Moreover, it is preferable that the element color of this element row is a translucent color. This is because the element cores are meshed and locked, and then the core wire for joining is inserted into the common hole, which is the gap between the element strings formed by meshing, but the element color is translucent when inserted. By making the color, it becomes easy to visually check the degree of insertion of the core wire that is not obstructed by the element rows that are originally meshed, and the core wire insertion work can be further facilitated. Translucent monofilaments have been widely used in the past, and can be obtained by forming them into a coiled fastener element array as a raw yarn. The translucent color referred to here indicates a transparent color that is more transparent.
[0017]
In addition, it is preferable to woven conductive fibers into at least a part of the warp and / or weft of the plastic fabric constituting the collector screen belt of the present invention. It is preferable to prevent various troubles caused by static electricity, such as a collector screen belt used in the production of spunbond nonwoven fabrics, which is used in an atmosphere where static electricity is easily generated. Further, in the joining core wire used for the coil fastener joint constituting the filter cloth of the present invention, for joining with various cross-sectional shapes such as circular cross-sectional shape, cross-sectional elliptical shape, cross-sectional polygonal shape, cross-sectional irregular shape, etc. A core wire is applicable, and a plurality of core wires may be inserted, but a twisted wire obtained by twisting a plurality of monofilaments is preferable. For example, a stranded wire obtained by twisting 2 to 20 polyester monofilaments having a wire diameter of 0.1 to 1 mmΦ is applied. By employing such a stranded wire, a core wire along the common hole diameter of the coil fastener joint can be selected, and a core wire that can be easily inserted can be obtained. By doing so, the meshing head (3h) of each coiled fastener element row approaches the corresponding folding loop (5), and as a result, the gap in the coil fastener joint portion is reduced. In addition, what is necessary is just to manufacture this strand wire by a conventional method, and what is necessary is just to set suitably about the number of twists, a wire diameter, a twist number, etc. according to a use application.
[0018]
In addition, when the time and labor required to put the collector screen belt having the coil fastener joint of the present invention into a known spunbond nonwoven fabric manufacturing apparatus was measured, in the case of a 4 m wide collector screen belt, two workers were The work was completed in 5 minutes. On the other hand, in the case of the collector screen belt having the conventional pin seam joint, four people spent 30 minutes of laying work. Further, when the air permeability of each joint portion was measured, the air permeability of the coil fastener joint portion of the present invention was about 23100 ccm (the air permeability of the plastic fabric body portion was about 24600 ccm), whereas the pin seam joint portion The air permeability was about 26500 ccm. Two additional core wires are added to the common space portion of the pin seam joint portion, and the air permeability is 24700 ccm, which is as high as the air permeability of the plastic fabric. However, additional labor is required to insert the additional core wire. As a result, time was spent and the effectiveness of the present invention was confirmed.
[0019]
The present invention has been described above based on the illustrated embodiments. However, the present invention is not limited to such embodiments, and various modifications may be made to the specific structure within the scope of the present invention. Needless to say.
[0020]
【The invention's effect】
As described above in detail, according to the present invention, there can be a collector screen belt which does not have a problem of fiber adhesion to the joint portion and can be easily joined.
[Brief description of the drawings]
FIG. 1 is a side view of a coil fastener joint portion of a collector screen belt of the present invention.
FIG. 2 is a plan view of a coiled fastener element array during molding.
is there.
FIG. 3 is a side view of the coiled fastener element row of FIG. 2 as viewed from the meshing head side.
FIG. 4 is a perspective view of a slider that meshes coiled fastener element rows from above and below.
FIG. 5 is a plan view of a general coil fastener.
FIG. 6 is a conceptual diagram of using a collector screen belt when producing a spunbonded nonwoven fabric.
FIG. 7 is an enlarged plan view of a joint portion.
A: An enlarged plan view of the joint portion of the spiral seam structure is shown.
B: An enlarged plan view of the coil fastener structure joint is shown.
(However, some of the borders have been modified to improve visibility.)
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Coil fastener fastener part of collector screen belt 2 Plastic fabric 3 Coiled fastener element row | line | column 3h Engagement head part 3d of coiled fastener element row | line | male Intersection part 4 Coiled fastener element row | line | warp 5 Common loop 7 Core wire for joining 8 Vertically meshing type joint forming slider 9 Weft 10 Cloth tape 11 Lateral meshing type joint forming slider 12 Coiled fastener element array fixing core wire 13 Spinning device 14 Collector screen belt 15 Fiber assembly (web )
16 Suction device 17 Gap 18 Spiral wire

Claims (3)

A collector screen belt for collecting and transporting fiber aggregates on the surface of an endless plastic fabric, and has a stretchability pre-molded to lock each other at both ends of the plastic fabric body. The plastic woven fabric main body is constituted by a coiled fastener element array made of a single synthetic resin wire in a state where the coiled fastener element array extends within a range of 1 to 25% of a reference length dimension at the time of molding. It is attached by entangled with a warp loop, and the coiled fastener element rows at both ends are engaged with each other in the vertical direction, and the joining core wire is inserted into the common hole formed by the engagement so as to be joined endlessly. A collector screen belt for producing nonwoven fabrics.   2. The collector screen belt for producing a nonwoven fabric according to claim 1, wherein the element color of the coiled fastener element array is a translucent color.   The collector screen belt for producing a nonwoven fabric according to claim 1, wherein the joining core wire is a stranded wire formed by twisting a plurality of monofilaments.

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