• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention provides a molten glass in a bushing (10) having a glass outlet (18) in which two nozzle holes (12) having a substantially flat shape are paralleled, and which can take out the molten glass from the nozzle holes (12). The subsidiary flow introduction path 20 for guiding the subsidiary flow which flows as a withdrawal from the nozzle hole 12 between each nozzle hole 12 is provided.
    公开号:KR20020095164A
    申请号:KR1020027006264
    申请日:2001-03-13
    公开日:2002-12-20
    发明作者:가사이신；미우라야스시
    申请人:니토 보세키 가부시기가이샤；
    IPC主号:
    专利说明:

    Bushing and glass fiber producing method
    [2] Background Art Conventionally, flat glass fibers having a flat cross section have been known as glass fibers used for glass fiber nonwoven fabrics and the like. When the flat glass fibers are made of paper to form a nonwoven fabric, the flat glass fibers overlap each other in the horizontal direction, so that the bulk density of the nonwoven fabric is improved and a large amount of strength is applied to the nonwoven fabric by bonding with a small amount of binder. Can give For this reason, the technique of forming a glass fiber nonwoven fabric using flat glass fiber is attracting attention in recent years.
    [3] Moreover, generally, in order to manufacture glass fiber, a molten glass is hold | maintained in the melting furnace with a bushing, and the operation | work which pulls out molten glass from the nozzle hole formed in the bushing is performed. And in order to manufacture the flat glass fiber mentioned above, what is necessary is just to take out molten glass from the nozzle hole which forms a flat shape.
    [1] The present invention relates to a bushing for spinning flat glass fibers having a flat cross section.
    [14] 1 is a bottom view illustrating the bushing of the present invention.
    [15] FIG. 2 is a schematic configuration diagram showing a glass fiber manufacturing system using the bushing shown in FIG. 1. FIG.
    [16] 3 is an enlarged view of an area enclosed by the dashed-dotted line A of the bushing shown in FIG. 1.
    [17] 4 is a cross-sectional view of the IV-IV direction of FIG.
    [18] Fig. 5 is a perspective view showing a characteristic portion (glass outlet) of the bushing of the present invention.
    [19] 6 is a view used for explaining the operation of the bushing when the molten glass is pulled out from the nozzle hole for a while.
    [20] 7A to 7D are views showing a process of separating the joined molten glass.
    [21] 8 shows a variant of the bushing according to the invention.
    [22] 9A and 9B show another variant of the bushing according to the invention.
    [4] However, the conventional bushing has the following problems. That is, in the bushing, although two nozzle holes are often parallel, there existed a problem that molten glass drawn out from the adjacent nozzle hole contacts and joins when glass fiber is radiating for a while. If the molten glass suddenly joins, it is necessary to stop the spinning operation of the glass fibers once, which causes a great problem in the manufacturing process.
    [5] Moreover, although the molten glass drawn out from the adjacent nozzle hole tends to merge when the spinning operation | work of glass fiber is once stopped, it is calculated | required to isolate this joined molten glass easily.
    [6] Moreover, the flattening rate fell by the surface tension which acts on itself, and the molten glass drawn out from the nozzle hole which has an ellipse cross section has a problem that the cross section becomes circular.
    [7] The present invention has been made in view of the above circumstances, and the molten glass drawn out from two parallel nozzle holes cannot be easily joined during spinning, and the joined molten glass can be easily separated, and the flatness ratio of flat glass fibers It is an object of the present invention to provide a bushing and a method for producing glass fibers that can be prevented from deteriorating.
    [8] In order to achieve the above object, the present invention provides a glass outlet portion in which two nozzle holes having a substantially flat shape are paralleled, and in a bushing capable of withdrawing molten glass from the nozzle hole, the molten glass is withdrawn from the nozzle hole. And a subsidiary inflow path for guiding concomitant flow flowing between the nozzle holes.
    [9] According to the bushing according to the present invention, the accompanying flow flowing as the molten glass is withdrawn from the nozzle hole is guided between the nozzle holes by passing through the receiving flow inlet path. The drawn molten glass is prevented from approaching, and the molten glass becomes difficult to join with each other during spinning. In addition, even when the molten glass joins for the reason that the spinning operation of the glass fiber was once stopped, the attendant flows when the spinning operation is resumed and the molten glass is withdrawn from each nozzle hole, and the attendant flow is introduced into the attendant introduction. Since it guides through each nozzle hole through the hole, the joined molten glass can be isolate | separated easily. Moreover, the molten glass drawn out from each nozzle hole is cooled by accompanying flow. For this reason, since a viscosity increases and solidifies before a flat rate falls by surface tension, glass fiber with a high flat rate can be obtained.
    [10] Moreover, in the bushing of this invention, the glass outlet part is arranged in multiple numbers in the direction orthogonal to the parallel direction of two nozzle holes, and the convection inflow path extends in the arrangement direction of the glass outlet part, and between each nozzle hole, It is preferable to have a discharge portion for discharging the subsidiary flow.
    [11] In such a configuration, the accompanying flow can be discharged from the discharge portion of the accompanying flow introduction path, and the jet can be efficiently ejected to the molten glass drawn out from each nozzle hole.
    [12] The manufacturing method of the glass fiber of this invention uses the bushing which has the glass outflow part in which two nozzle holes which form the substantially flat shape were paralleled, and the manufacturing method of the glass fiber which draws a molten glass from each nozzle hole and spins a glass fiber. WHEREIN: When taking out a molten glass from each nozzle hole, the attendant flow which flows along with the extraction of a molten glass is introduce | transduced between each nozzle hole, It is characterized by the above-mentioned.
    [13] According to the method for producing a glass fiber according to the present invention, when the molten glass is drawn out from each nozzle hole, the accompanying flow is introduced between the nozzle holes, so that the molten glass drawn out from each nozzle hole by the wind of the accompanying flow approaches. It is prevented, and it becomes difficult for molten glass to join. In addition, even when the molten glass joins for the reason of stopping the spinning operation of the glass fiber once, the attendant flows when the molten glass is resumed and the molten glass is withdrawn from each nozzle hole, and the attendant flows. Since it guides between each nozzle hole through an introduction path, molten glass can be isolate | separated easily. Moreover, the molten glass drawn out from each nozzle hole is cooled by accompanying flow. For this reason, since a viscosity increases and solidifies before a flat rate falls by surface tension, glass fiber with a high flat rate can be obtained.
    [23] EMBODIMENT OF THE INVENTION Hereinafter, with reference to an accompanying drawing, the suitable Example of the manufacturing method of the bushing and glass fiber which concerns on this invention is described in detail. In addition, the same code | symbol is used for the same element, and the overlapping description is abbreviate | omitted.
    [24] FIG. 1 is a bottom view showing the bushing 10 of the present embodiment, and FIG. 2 is a schematic configuration showing a glass fiber manufacturing system 1 for producing glass fibers using the bushing 10 shown in FIG. 1. It is also.
    [25] First, with reference to FIG. 2, the whole glass fiber manufacturing system 1 is demonstrated. The glass fiber manufacturing system 1 is equipped with the melting furnace 2 in which the bushing 10 was mounted in the bottom surface, and the molten glass stayed, and the molten glass discharged | emitted from the nozzle hole of the bushing 10 is cooled. As a result, it becomes a filament. Although details will be described later, the filament released from the bushing 10 of the present embodiment has a flat cross section. Furthermore, a binding agent applying roller 4 is provided below the bushing 10, and the binding agent is applied to the filament by the binding agent applying roller 4. Further, the filament to which the binding agent is applied is focused by the focusing roller 6 to form a strand, thereby obtaining glass long fibers. Thereafter, the strand is wound by the rotating drum 8 to form a so-called cake. The above is the structure of the glass fiber manufacturing system 1.
    [26] Next, with reference to FIG. 1, FIG. 3-FIG. 5, the structure of the bushing 10 of a present Example is demonstrated in detail. As shown in FIG. 1, the bushing 10 is provided with the glass outflow part 18 in which the nozzle hole 12 which has a flat cross section is parallel to the longitudinal direction. And the glass outflow part 18 is arranged in multiple numbers in the direction (Y direction) orthogonal to the parallel direction (X direction of FIG. 1) of the nozzle hole 12, and the row of nozzle block 30 is formed. Further, in the bushing 10, a plurality of nozzle blocks 30 are arranged in the X direction.
    [27] 3 is an enlarged view of the region enclosed by the dashed-dotted line A of the bushing 10 shown in FIG. 1, FIG. 4 is a cross-sectional view in the IV-IV direction of FIG. 3, and FIG. 5 is the glass shown in FIG. 3. An enlarged perspective view of the outlet portion 18. 3 to 5, notches 14 are formed in a rectangular parallelepiped shape between the nozzle holes 12, and further, grooves extending along the longitudinal direction of the nozzle holes 12 are formed. An accompanying flow introduction path 20 is formed.
    [28] The accompanying flow introduction path 20 extends in the arrangement direction of the glass outlet portion 18 (see FIG. 3), and at the same time, a discharge portion for discharging the accompanying flow between each nozzle hole 12, that is, toward the notch 14. (22) is provided. Here, the accompanying flow means the wind which flows as it pulls out a molten glass from the nozzle hole 12. As shown in FIG. In addition, as shown in FIG. 5, the accompanying flow introduction path 20 extends to the edge part of the nozzle block 30, and the cross-sectional shape becomes concave shape with a square part.
    [29] Next, referring to Figs. 6 and 7, the operation of the bushing 10 of the present embodiment will be described. First, with reference to FIG. 6, the effect | action in the spinning of a glass fiber is demonstrated. When the rotating drum 8 is operated and the molten glass in the melting furnace 2 (refer FIG. 2) is pulled out from the nozzle hole 12 for a long time, the accompanying flow flows in the accompanying flow introduction path 20. In detail, the attendant flows in the area indicated by the broken line B, for example, from the rear of the drawing toward the front, and is located between the nozzle holes 12 from the discharge portion 22 of the attendant introduction path 20. It flows into the notch 14 efficiently. For this reason, the molten glass drawn out from each nozzle hole 12 is prevented from approaching by the wind power of accompanying flow, and it becomes difficult for molten glass to join together during spinning.
    [30] In addition, since the nozzle hole 12 has the flat shape, the molten glass drawn out from each nozzle hole 12 has comprised the flat shape according to the shape of the nozzle hole 12 immediately after taking out. However, conventionally, the molten glass drawn out lowered flatness by surface tension, and the cross section of glass fiber tended to become circular. On the other hand, in this embodiment, since the molten glass drawn out from the nozzle hole is cooled by the accompanying flow introduced into each nozzle hole 12, the molten glass increases in viscosity before the flatness decreases due to surface tension. It solidifies. Thereby, glass fiber with a high flatness can be obtained.
    [31] Next, with reference to FIGS. 7A to 7D, the operation of the bushing 10 after the spinning operation of the glass fiber is once stopped will be described. When the spinning drum is stopped and the spinning operation of the glass fibers is stopped once, the attendant flow does not flow. As shown in FIG. 7A, the molten glass drawn out from the adjacent nozzle holes 12 joins. Moreover, since the notch 14 is cooled, the joining of a molten glass arises by the temperature of the inner part of the adjacent molten glass falling, and the viscosity of this part improving. As shown in FIG. 7B, when the spinning operation is resumed and the molten glass is started to be drawn out from the nozzle hole 12, in the region B, the attendant flows through the attendant flow inlet passage 20 and is angled. It begins to flow into the notches 14 between the nozzle holes 12. Then, as shown in FIG. 7C, the joined molten glass begins to separate gradually by the accompanying wind, and finally melted drawn out from the adjacent nozzle holes 12, as shown in FIG. 7D. The glass is completely separated. Thus, according to the bushing 10 of a present Example, only the molten glass can be taken out from the nozzle hole 12, and the molten glass which joined easily can be separated.
    [32] Next, with reference to FIG. 8, the modification of the bushing of a present Example is demonstrated. As shown in FIG. 8, in the bushing of this modification, in addition to the accompanying flow introduction path 20 which extends in the longitudinal direction of the nozzle hole 12, the accompanying flow introduction path extended in the parallel direction of the adjacent nozzle holes 12 is shown. 40 is formed. In such a configuration, when the molten glass is taken out from the nozzle hole 12, the attendant flows from the side of the nozzle block 30 through the attendant inlet passage 40 and flows into the attendant inlet passage 20. . Thereby, more accompanying flow can be introduce | transduced between each nozzle hole 12, and the effect which prevents the merged of the molten glass mentioned above, the effect which isolates the joined molten glass, and the flatness ratio of flat glass fiber The effect of preventing this from falling can be further improved.
    [33] Next, another modification of the bushing of this embodiment will be described with reference to FIGS. 9A and 9B. It is the shape of the nozzle hole 12 that the bushings shown in Figs. 9A and 9B differ from the above embodiment. The nozzle hole 12 of the modification shown in FIG. 9A becomes a rectangle, and the nozzle hole 12 of the modification shown in FIG. 9B has the dumbbell shape which combined the circle | round | yen with the both ends of a rectangle. Even when the nozzle hole 12 is made into such a flat shape, glass fibers with a flat cross section can be obtained.
    [34] As mentioned above, although the invention made by this inventor etc. was demonstrated concretely based on an Example, this invention is not limited to the said Example. For example, the cross-sectional shape of the accompanying flow introduction passage does not necessarily need to have two corner portions, and can be variously changed into a semicircle, a triangle, and the like.
    [35] As described above, according to the bushing and the method of manufacturing the glass fibers according to the present invention, the accompanying flow flowing as the molten glass is drawn out from the nozzle hole is guided between the nozzle holes through the receiving flow introduction path. For this reason, the molten glass drawn out from each nozzle hole is prevented from approaching by the wind power of accompanying flow, and it becomes difficult for molten glass to join together during spinning. In addition, even when the molten glass joins for the reason of stopping the spinning operation of the glass fiber once, the attendant flows out if the molten glass is resumed and the molten glass is taken out from each nozzle hole, and the attendant flow is accompanied. Since it guides between each nozzle hole through a flow introduction path, the joined molten glass can be isolate | separated easily. Moreover, the molten glass drawn out from each nozzle hole is cooled by accompanying flow. For this reason, since a viscosity increases and solidifies before a flat rate falls by surface tension, glass fiber with a high flat rate can be obtained.
    权利要求:
    Claims (3)
    [1" claim-type="Currently amended] In a bushing having two glass nozzles having a substantially flat shape and having a glass outlet in parallel, with which molten glass can be drawn from the nozzle holes,
    Bushings characterized by comprising a subsidiary flow introduction path for guiding the subsidiary flow flowing as the molten glass is withdrawn from the nozzle hole between the nozzle holes.
    [2" claim-type="Currently amended] The said glass outlet part is arranged in multiple numbers in the direction orthogonal to the parallel direction of the said two nozzle holes,
    The bushing introduction passage extends in the arrangement direction of the glass outlet portion and has a discharge portion for discharging the attendant flow between the nozzle holes.
    [3" claim-type="Currently amended] In the manufacturing method of the glass fiber which draws a molten glass from each said nozzle hole and spins a glass fiber using the bushing which has the glass outflow part in which two nozzle holes of the substantially flat shape were paralleled,
    When taking out the said molten glass from each said nozzle hole, the submerged flow which flows according to the extraction of the said molten glass is introduce | transduced between each said nozzle hole, The manufacturing method of the glass fiber characterized by the above-mentioned.
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    2000-03-14|Priority to JPJP-P-2000-00070514
    2000-03-14|Priority to JP2000070514
    2001-03-13|Application filed by 니토 보세키 가부시기가이샤
    2002-12-20|Publication of KR20020095164A
    2007-02-05|Application granted
    2007-02-05|Publication of KR100675500B1
    优先权:
    申请号 | 申请日 | 专利标题
    JPJP-P-2000-00070514|2000-03-14|
    JP2000070514|2000-03-14|
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