JPS5920617B2 - Air nozzle equipment for glass fiber spinning - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an air nozzle assembly for spinning glass fibers, and more particularly to an air nozzle assembly for blowing an air stream onto an orifice plate surface of a glass fiber spinning furnace.

Conventionally, a method of spinning glass fibers by blowing an air stream onto the orifice plate surface of a glass fiber spinning furnace is known.
A typical example thereof is disclosed in Japanese Patent Publication No. 51-46859.

The disclosed method involves molten glass flowing through an orifice forming a cone of molten glass on the orifice plate surface, and a large number of orifices piercing each other so closely that the cones merge into each other. When spinning glass fibers from an orifice plate with a flat surface provided with holes, stable cones are formed and the cones are cooled and placed in close proximity to the orifice plate. the orifice plate substantially parallel to and toward the orifice plate to eliminate the stagnant gas that is being spun from the orifice and to replenish the gas that is wicked downwardly by the spun fibers; It directs the airflow that reaches the area. This method can also be applied to the production of glass fibers by so-called tip nozzle plates. Examples of air nozzle devices for blowing an air stream onto the orifice plate surface in the above type of glass fiber spinning method include U.S. Pat.
No. 986,853 discloses a device in which air introduced at equal pressure from a plurality of inlet pipes is guided into an air nozzle body and blown out from one continuous opening.

However, since the air nozzle device of this US patent has a large diameter blowout opening, the pressure of the airflow hitting the orifice plate surface is weak, and the cooling effect is determined by the pressure hitting the orifice plate rather than the amount of air, so the cooling effect is ultimately strong. On the other hand, increasing the amount of air in order to increase the cooling effect had disadvantages such as increasing the frequency of cutting the filament.

Therefore, in consideration of this point, the special public
There is an air nozzle device disclosed in Publication No. 293,
This is a system in which a plurality of independent tubular nozzles are fixed to a fixture in a line with intervals, and instead of one large blowout opening, multiple independent tubular nozzles are arranged in parallel at intervals. By using a tubular nozzle, we succeeded in increasing the pressure of the air flow hitting the orifice plate surface and increasing the cooling effect.

Also, similar to the one disclosed in Japanese Patent Publication No. 54-33293, an air nozzle device having a configuration in which a plurality of independent tubular nozzles are arranged side by side is disclosed in Japanese Patent Publication No. 54-10.
In this air nozzle device, each tubular nozzle is connected to a manifold through a communication passage, and each communication passage is provided with a valve for independently and individually controlling the flow rate of each tubular nozzle. A mechanism is built in.

In this air nozzle device as well, the air flow is discharged from multiple independent tubular nozzles.
Similar to U.S. Pat. No. 3,986,8-33293
It was able to provide an excellent cooling effect compared to No. 53. Furthermore, in the air nozzle device disclosed in JP-A-54-101925, as mentioned above,
A valve mechanism is provided to independently and individually control the flow rate of the tubular nozzle, so the operator is not required to perform remote indirect operation.
While directly observing the spinning state of molten glass near the orifice plate, the flow rate of the air flow blown out from the nozzle passage of each tubular nozzle can be individually fine-tuned to obtain the optimal cooling effect of the orifice plate. It became like that.

However, in the air nozzle device disclosed in JP-A-54-101925, the valve mechanisms that need to be installed in each nozzle passage are arranged in a row, so a certain amount of space is required to install the valve mechanisms. It is not possible to reduce the pitch interval of the nozzle passages, which limits the ability to uniformly cool the orifice plate by increasing the number and density of air streams blown out from the nozzle passages. The present invention has been made in view of the above-mentioned drawbacks of the prior art, and its object is to provide an air nozzle device for blowing an air flow onto an orifice plate surface of a glass fiber spinning furnace, in which air flow is blown out from each nozzle passage. To provide an air nozzle device which is equipped with a valve device which can individually finely adjust the flow rate of the air nozzle, and which can arrange the nozzle passages closely by reducing the pitch interval of the nozzle passages despite the presence of the valve device. That's true.

To achieve the above object, the present invention provides an air nozzle device for blowing an air flow onto an orifice plate surface of a glass fiber spinning furnace, which comprises a manifold having an air supply port and a plurality of nozzle passages. an air nozzle with
and a valve device including a plurality of valve mechanisms respectively incorporated in a plurality of communicating passages that communicate the manifold with the plurality of nozzle passages, the valve mechanisms being arranged in two rows in a staggered manner. An air nozzle device is provided.

Preferred embodiments of the present invention will be described with reference to the drawings.
The figure shows the use of the air nozzle assembly of the present invention in a spinning apparatus, shown in side cross-section.

The reference numeral 2 in the figure indicates a glass fiber spinning furnace, and the molten glass, which has been melted in advance and adjusted to a constant temperature in the spinning furnace 2, passes through an inlet passage 6 made in the refractory 4 and flows into the platinum alloy fiber spinning furnace below. It flows into the spinning bushing 8. The bushing 8 has a box-like shape with an orifice plate 10 having a large number of orifices on the lower surface and a plate rising from the plate to form a side wall 12.Although not shown in the figure, the bushing 8 has a controlled low A pair of terminals for carrying high voltages and currents is provided on the exterior of the sidewall plate 12, usually on the widthwise side of the bushing. By passing current from the terminal mainly to the orifice plate 12 and to some extent to the side wall plate 12, these plates made of platinum alloy generate heat, increasing the temperature of the entire bushing, especially the temperature of the orifice spray port 0, and increasing the temperature of the molten glass. Prevent temperature drop and control the temperature to be suitable for spinning. This control is typically performed by the sidewall plate 12 of the bushing.
This is done using a loop that uses the thermogenic power from a thermocouple welded to the bushing as an input signal to control the current flow to maintain a constant temperature in the bushing. In the illustrated embodiment, the orifice plate 10 is of the type disclosed in Japanese Patent Publication No. 51-46859, which has a large number of closely arranged orifices on the flat bottom surface, but a large number of tip nozzles protrude from the bottom surface of the plate. , a so-called tip nozzle plate may be formed.

The molten glass flowing out from the orifice of the orifice plate 10 is pulled by the winder 14 and is thinned into a filament while forming a cone at the outlet of the orifice, and a sizing agent is applied to this filament by the application roller of the applicator 16. The strands are collected into one or more strands by a converging roll 18, and wound around a drum of a winder 14 while being twisted by a traverse device 20 to form a package 22.

Reference numeral 24 designates an air nozzle assembly of the present invention for blowing an air stream onto the lower surface of the orifice plate 10, thereby cooling the orifice plate surface and causing the molten glass to flow out of the orifice and be atomized to form a filament. It sometimes forms stable molten glass cones at the orifice outlet, cools the cones and eliminates stagnant gases present in the vicinity of the orifice plate 10, and also eliminates gases sucked downward by the spun fibers. Replenish.

Air nozzle arrangement 24 is connected to an air supply conduit or hose 26 and is supplied with air by a pressurized air source, not shown. Details of the structure of the air nozzle device 24 are shown in FIGS. 2 and 3.
As shown in the figure, the manifold 30 includes an air supply port 28, an air nozzle 34 includes a plurality of nozzle passages 32, and a plurality of air nozzles 34 that communicate the manifold 30 with the plurality of nozzle passages 32, respectively. The valve device 40 includes a plurality of valve mechanisms 38 respectively incorporated in the communication passages 36 of the valve.

In the illustrated embodiment, the air nozzle 34 comprises a metallic tubular nozzle element 42, but is not limited to this.
Any other form may be used as long as a plurality of nozzle passages 32 can be provided, for example, a structure in which metal nozzle ribs having recesses in the longitudinal direction are juxtaposed and combined to form a nozzle passage with the recesses. You can also do this.

The valve mechanisms 38 are arranged in two rows in a staggered manner, as shown in FIG.

By doing so, the number of valve mechanisms can be increased, and the communicating passages 36 can be arranged closely together. Therefore, the pitch interval of the nozzle passages 32 can be reduced, and the nozzle elements 42 can be arranged closely. enable. Although the cross-sectional shape of the nozzle passage 32 may be circular, it is preferably oval or elliptical as shown in FIG. Shall be oval or oval. By doing this, the possibility of closely arranging the nozzle element 42 and the communication passage 36 itself is increased, and in combination with the arrangement of the valve mechanisms 38 in two rows in a staggered manner, the nozzle element 42 can be arranged even more closely. can be placed. In this case, the long axis of the cross-sectional shape of the nozzle passage is perpendicular to the longitudinal direction of the orifice plate 10,
In other words, by arranging the air nozzle 34 parallel to the width direction of the orifice plate, it is possible to provide a wider uniform cooling effect in the width direction of the orifice plate, increasing the width-wise arrangement dimension range of orifices on the orifice plate. It becomes possible to do so. Note that the cross-sectional shapes of the nozzle passage 32 and the communication passage 36 are not limited to an oval or an ellipse, but may be any other shape elongated in the same direction, such as an elongated octagon or a rectangle. Each valve mechanism 3
Preferably, as shown in FIG. 5, a valve hole 46 having approximately the same diameter or a slightly larger diameter than the communication passage 36 is provided, which is opened across the communication passage 36 and has an internal thread 44 cut in a portion thereof. ,
A head 52 which is inserted into the valve hole 46, has a needle portion 50 having approximately the same diameter as the valve hole 46, has an external thread 48 cut in a portion thereof and which engages with the internal thread 44 of the valve hole 46, and can be rotated from the outside. The needle valve 54 is equipped with a needle valve 54.

Needle valve 54 may preferably be made of stainless steel. By rotating the head 52, the needle portion 50 of the needle valve 54 moves forward and backward within the valve hole 46, changing the opening degree of the communicating passage 36, and opening the communicating passage 36.
The flow rate of the airflow blown out from the nozzle passage 32 through the nozzle passage 32 can be finely adjusted. Since the needle portion 50 of the needle valve 54 may have the same diameter as the communication passage 36 or a slightly larger diameter, the valve mechanisms 38 can be arranged relatively closely together, thereby eliminating the need for a two-row staggered arrangement of the valve mechanisms 38. The combination allows a closer arrangement of the nozzle passages 32 or nozzle elements 42. In the valve device 40, the communication passage 36 and the valve hole 46 are preferably formed in a metal valve block 56, and the manifold 30 is fixed to the valve block 56 by means such as bolts, and supports the nozzle element 42.

Note that the valve block 56 may be replaced by a portion that is the same as the manifold 30. Further, a coil spring 58 may be disposed between the valve block 56 and the head 52 of the needle valve 54, so that the needle valve 54
By absorbing play between the valve hole 46 and the valve hole 46, fine adjustment of the flow rate can be made more accurately.

The head 52 of the needle valve 54 is preferably made as small as possible, and is preferably a head with a hexagonal hole, for example, which can be operated with a wrench.

As a result, when the valve mechanism 38 is closely arranged, the head 52
Interference with mutual interference scooping tools can be avoided. The angle of the valve hole 46 with respect to the communication passage 36 is approximately 90 degrees in the illustrated embodiment, but may be any angle in the range of 70 degrees to 110 degrees.

The manifold 30 is made of iron plate material etc. connected together with bolts etc. in a box shape, and has a hose 2 at a position corresponding to the air supply port 28.
A nipple 60 for connecting 6 is connected with a bolt or the like. The number of air supply ports 28 and nipples 60 is four in the illustrated embodiment, and in this case, the interior of the manifold 30 is also divided into four corresponding chambers by three partition plates 62. Further, valve devices (not shown) for adjusting the air flow rate are installed between the hoses 26 connected to each nipple 60 and the air supply source, and by controlling each valve device independently, the nozzle The flow rate of the airflow blown out from the passage 32 can be divided into four corresponding groups and individually controlled. The above-mentioned valve device 40 is used to control the flow rate by dividing the manifold 30 and dividing the air flow blown out from the nozzle passage 32 into four groups.
By combining individual fine adjustments of the air flow blown out from the nozzle passage 32 by the above, a wider range of flow rate control becomes possible. Therefore, according to the air nozzle device of the present invention, the valve mechanisms for individually finely adjusting the flow rate of the air flow blown out from the nozzle passages are arranged in two rows in a staggered manner, so that the pitch interval of the nozzle passages can be reduced. This makes it possible to closely arrange the nozzle passages, thereby increasing the density of the number of air streams blown out from the nozzle passages.

For example, if we compare this with the conventional configuration disclosed in JP-A No. 54-101925, in which the valve mechanisms are arranged in a row, we find that in the case of this conventional configuration, the air flow per 1 tatami length is The number was about 0.3 to 0.4,
In the illustrated embodiment of the present invention in which the needle valves are arranged in a staggered manner, it is possible to have up to about 1.0 needle valves per 1 CfL length, and especially when a configuration that allows close arrangement to the nozzle element itself is adopted, the needle valves can be arranged in a staggered manner. It became possible to have up to about 3 fibers per length, and the former achieved about 3 to 4 times higher density, and the latter about 8 to 10 times higher density. Therefore, by increasing the density of the air flow, the cooling effect of the orifice plate can be improved and uniformed, and the stagnant gas existing in the vicinity of the orifice plate can be better removed, and the orifice plate can be densely bored. It is possible to form a stable cone of molten glass in a large number of orifices and to improve the separation thereof, thereby achieving stable spinning of glass fiber with less yarn breakage.

[Brief explanation of the drawing]

FIG. 1 is a schematic side sectional view of the air nozzle device of the present invention showing how it is used in a spinning device, FIG. 2 is a front view showing a preferred embodiment of the air nozzle device of the present invention, and FIG. Figure 2 is a side view of the air nozzle device, Figure 4 is the side view of the air nozzle device.
FIG. 3 is a cross-sectional view taken along the - line of FIG. 3, showing the cross-sectional shape of the nozzle passage of the air nozzle device shown in FIG. It is a sectional view along the V line. In the figure, code 2...Glass fiber spinning furnace, 10...
... Orifice plate, 24 ... Air nozzle device, 28 ... Air supply port, 30 ...
...Manifold, 32...Nozzle passage, 34.
...Air nozzle, 36...Communication hole, 38
... Valve mechanism, 40... Valve device.

Claims (1)

[Scope of Claims] 1. An air nozzle device for blowing an air flow onto an orifice plate surface of a glass fiber spinning furnace, which comprises: a manifold equipped with an air supply port; an air nozzle equipped with a plurality of nozzle passages; , a valve device including a plurality of valve mechanisms respectively incorporated in a plurality of communicating passages that communicate the manifold with the plurality of nozzle passages, and the valve mechanisms are arranged in two rows in a staggered manner. An air nozzle device characterized by: 2. In the air nozzle device according to claim 1, each of the valve mechanisms has a diameter substantially the same as or slightly larger than that of the communication passage, which is opened across the communication passage and partially has an internal thread. a head that is inserted into the valve hole and partially has an external thread that engages with the internal thread of the valve hole, has a needle portion that has approximately the same diameter as the valve hole, and can be rotated from the outside. an air nozzle device having a needle valve having a section; 3. In the air nozzle device according to claim 2, the communication hole and the valve hole of the valve device are formed in a valve block, and a coil spring is disposed between the valve block and the head of the needle valve. air nozzle device. 4. The air nozzle device according to claim 2, wherein the head of the needle valve is a head with a hole that can be operated with a wrench. 5. The air nozzle device according to claim 1, wherein the cross-sectional shape of the nozzle passage is oval or elliptical.