JPS5864241A - Air nozzle device for spinning glass fiber - Google Patents

Abstract

PURPOSE:To increase the density of the number of air flows by specifying the arrangement of the valve mechanism of valve devices for communicating paths between a manifold provided with an air feeding inlet and a plurality of air nozzle paths so as to reduce the pitch intervals among the nozzle paths. CONSTITUTION:An air nozzle device 24 is used to spray air flows on the surface of the oriface plate 10 of a glass fiber spinning furnace 2. Air is fed to the device 24 from the feeding inlet 28, passed through the manifold 30 and a plurality of communicating paths 36, and ejected from nozzle paths 34. The valve mechanism 38 of valve devices 40 incorporated into the paths 36 are arranged zigzag in two rows. As a result, the number of the mechanisms 38 can be increased and the paths 36 can be arranged in a close state. Accordingly, the paths 34 can be arranged in a close state at small pitch intervals.

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 is such that the bath molten glass flowing out through the orifice forms a cone of molten glass on the surface of the orifice plate, and a large number of orifices are tightly compressed together so that the cones merge into each other. When spinning glass fibers from an orifice plate with a flat surface, forming stable cones, the cones are cooled and placed in close proximity to said orifice plate. substantially parallel to and toward the orifice plate a number of glass filaments being spun from the orifice in order to eliminate any stagnant gas present and replenish the gas sucked downwardly by the spun fibers. It directs the airflow that reaches it. This method can also be applied to the production of glass fibers by so-called tip nozzle plates.

An example of an air nozzle device for blowing an air stream onto the orifice plate surface in the above-mentioned SL glass fiber spinning method is the one disclosed in U.S. Patent No. 6,986.85. Air is introduced at the same pressure from several inlet pipes, guided to the internal pressure of the air nozzle body, and blown out from one continuous opening.

However, in this U.S. patented air nozzle device, the blowout opening has a large diameter, so the pressure of the airflow hitting the orifice plate surface is weak, and the cooling effect is achieved by the pressure hitting the orifice plate rather than the amount of sudden air, resulting in a strong cooling effect. I can't get it.

On the other hand, increasing the air sensitivity in order to increase the cooling effect has the disadvantage of increasing the frequency of filament cutting.

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 multiple tubular nozzles, each independent of the other, are fixed to a fixture in a row in parallel at intervals, and in this way, 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.
This air nozzle device is disclosed in Japanese Patent No. 1925.
In lt, each tubular nozzle is connected to a manifold through a communication passage, and a burlap mechanism is built into each communication passage to control the flow rate of each tubular nozzle independently (IW).This air nozzle device Also, in that the air flow is discharged from multiple independent tubular nozzles, it has a superior cooling effect compared to that of U.S. Patent No. 3,986,853, similar to that of Japanese Patent Publication No. 54-33293. I was able to do that.

Furthermore, in the air nozzle device disclosed in JP-A-54-101925, as mentioned above, a pulp mechanism is provided to independently and individually control the flow rate of the tubular nozzle, so one worker can work remotely. Optimal cooling of the orifice plate is achieved by individually fine-tuning the flow rate of the air flow blown out from the nozzle passage of each tubular nozzle while directly observing the spinning state of the molten glass near the orifice plate, rather than by indirect operation. Now you can get the effect.

However, in the air nozzle device disclosed in Japanese Patent Application Laid-Open No. 5-4-101925, the pulp mechanism that needs to be installed in the nozzle passage is arranged in a line, so a certain amount of space is required to install the pulp mechanism. As a result, it is not possible to reduce the gap between the nozzle passages, which limits the ability to uniformly cool the orifice plate by increasing the number density of air flows 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 that is equipped with a pulp device that can individually finely adjust the flow rate of the air nozzle, and that allows the nozzle passages to be closely arranged (by reducing the pitch interval of the nozzle passages despite the presence of the pulp device). It is to be.

In order 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, the air nozzle device comprising a manifold having an air supply port and a plurality of nozzle passages. an air nozzle with
a pulp device including a plurality of pulp mechanisms built into each of the plurality of communication passages that communicate the manifold with the plurality of nozzle passages, and the pulp mechanisms are 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 machine, shown in section 111. Reference numeral 2 in the figure indicates a glass fiber spinning furnace, and the molten glass that has been melted in advance and adjusted to a constant temperature in the spinning furnace 2 is
It passes through an inflow passage 6 made in the refractory 4 and flows into the platinum alloy spinning bushing 8 below. The bushing 8 has a box-like shape composed of an orifice plate 10 having a large number of orifices on the lower surface and a plate rising from the orifice plate 10 and forming a side wall 12, and although not shown in the figure,
1 for flowing controlled low voltage and large current to bushing 8
Pair terminals on side wall plate 12. It is usually located on the outside of the side wall plate on the widthwise side of the bushing. By flowing a 12Kt flow from the terminal mainly to the orifice plate (and to some extent to the side wall plate), those plates made of platinum alloy generate Joule heat, and the temperature of the orifice plate 10 is increased to 1% of the temperature of the entire bushing.
Prevent the temperature of molten glass from dropping and control the temperature to be suitable for spinning. This control is normally performed by a loop that uses as an input signal a thermoelectromotive force from a thermocouple connected to the side wall plate 12VCf6 of the bushing to control the current flow so as to maintain the temperature of the bushing constant.

Further, in the illustrated embodiment, the orifice plate 10 is of the type disclosed in 1% Publication No. 46859/1985, which has a large number of orifices closely arranged on the lower surface with six flat surfaces, but the orifice plate 10 is of the type disclosed in Japanese Patent Publication No. 51-46859. A so-called chip nozzle plate having a protruding nozzle formed thereon may also be used.

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 orifice outlet, 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 the converging roll 18, and wound around the drum of the winder 14 while being twisted by the traverse device M20 to form the 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 become attenuated into filaments. to form stable molten glass cones at the orifice exit, cool the cones, and orifice plate 101.
C. Eliminates stagnant gas in the vicinity and replenishes gas sucked downward by the spun fibers.

The air nozzle arrangement ft24 is connected to an air supply conduit or hose 26 and is supplied with air by a pressurized air supply, not shown.

Details of the structure of the air nozzle device 24 are shown in FIG. 2 and #P, 3.
The manifold 30 has an air supply port 28-, and the air nozzle has a plurality of nozzle passages 32. It has a valve system fl140 consisting of a plurality of pulp mechanisms 38, each built into a plurality of communicating passages 36 which communicate with the passages 32, respectively.

In the illustrated embodiment, the air nozzle 34 comprises a metallic tubular nozzle element 42, but is not limited to this, but may take any other configuration that can provide a plurality of nozzle passages 32. For example, metal nozzle lips having recesses in the longitudinal direction may be arranged side by side and combined to form a nozzle passage in the recesses.

The pulp mechanisms 38 are arranged in two rows in a staggered manner, as shown in FIG. By doing so, the number of pulp mechanisms can be increased, making it possible to closely arrange the communicating passages 36, and therefore making it possible to reduce the pitch interval of the nozzle passages 32 and to arrange the nozzle elements 42 closely. - Although the cross-sectional shape of the nozzle passage 32 may be circular, it is preferably oval or elliptical as shown in FIG. 4. In this case, as shown in FIG.
The cross-sectional shape shall also be a similar oval or ellipse. 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 is more closely distributed with power. can do. In this case, the long axis of the cross-sectional shape of the nozzle passage is the orifice plate 10.
By arranging the air nozzle 34 perpendicular to the longitudinal direction of the orifice plate, that is, parallel to the width direction of the orifice plate, it is possible to provide a wider uniform cooling effect in the middle direction of the orifice plate.

It becomes possible to increase the range of width direction arrangement dimensions of orifices in the orifice plate. 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 a feeding square-rectangular shape.

Preferably, each pulp machine vk 38 has an internal thread 44 which is bored across the communication path 36 and partially has an internal thread 44, as shown in FIG.
was cut off. A pulp hole 46 having approximately the same diameter or a slightly larger diameter than the communicating path 36 and an external thread 48 inserted into the pulp hole 46 and partially engaged with an internal thread 44 of the pulp hole 46 are cut. The pulp hole 46 has a needle pulp 54 which has a =-yl portion 50 having the same diameter as the pulp hole 46 and has a head 52 which can be rotated from the outside. Needle pulp 54 can preferably be made of stainless steel. By rotating the head 52, the needle portion 50 of the needle pulp 54 is
moves forward and backward in the pulp hole 46, changes the opening degree of the communication passage 36, and finely adjusts the flow rate of the airflow blown out from the nozzle passage 32 through the communication passage 36. The needle portion 50 of the needle pulp 54 is connected to the communication w-36.
The valve mechanism 38 can be arranged relatively closely, so that the valve mechanism 38 can have the same diameter or a slightly larger diameter than the valve mechanism 3.
From the shrinkage combination K with the two-row staggered arrangement of 8, nozzle passage 3
2 or allows even closer arrangement of the nozzle elements 42.

In the pulp unit *40, the communication passage 36 and the pulp hole 46 are preferably formed in a metal pulp block 56Kh, and a manifold F30 is fixed to the pulp block 56 by means such as a bolt, and supports the nozzle element 42.

Note that a portion that is the same as the manifold 30 may be used instead of the pulp block 56.

In addition, the pulp block 56 and the head 5 of the needle pulp 54
A coil spring 58 may be arranged between the
As a result, the play between the needle pulp 54 and the pulp hole 46 can be absorbed, and the flow rate can be controlled more accurately.

The head 52 of the needle pulp 54 is preferably made as small as possible, and is preferably a head with, for example, a hexagonal hole that can be operated with a wrench. Mutual interference and interference with tools can be avoided.

The angle of the pulp holes 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 the hose 2 is connected to the position corresponding to the air supply port 28*.
A nipple 60 for connecting 6 is connected with a gilt joint. The saint is divided into four corresponding chambers by the supply holes 28 and 62.An air flow (not shown) is connected between the hose 26 connected to each nipple 60 and the air supply source. Pulp equipment for
By independently and individually controlling each pulping device, the flow rate of the air stream blown out from the nozzle passage 32 can be divided into four corresponding groups and individually controlled. In this way, the manifold 30 is divided and the nozzle passage 32 is also used to control the flow rate by dividing the air flow blown out into four groups. By combining these, a wider range of flow control becomes possible.

Therefore, according to the air nozzle device of the present invention, the pulp 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 arrange the nozzle passages closely together - thus increasing the number density of the air streams blown out of the nozzle passages, thereby providing more uniform cooling of the orifice plate.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing the use of the air nozzle device of the present invention in a spinning apparatus shown in FIG. 2 is a side view of the air nozzle device, FIG. 4 is a cross-sectional view of the nozzle passage of the air nozzle device in FIG. 2 shows the pulp mechanism of the air nozzle device in Figure 2,
7 is a sectional view taken along the line V-■ in FIG. 6. FIG. 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... Pulp device. Representatives: Asamura and 4 people

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, the air nozzle device comprising a manifold having an air supply port and a plurality of nozzle passages. and a pulp device including a plurality of pulp mechanisms respectively incorporated in a plurality of communication passages that communicate the manifold with the plurality of nozzle passages, and the pulp mechanisms are arranged in two rows in a staggered manner. An air nozzle device characterized by an array of air nozzles. (2. In the air nozzle device according to claim 1, each of the pulp mechanisms is opened to cross the communication passage, and a portion thereof is internally threaded. The communication passage has approximately the same diameter or A pulp hole with a slightly larger diameter and an outer thread inserted into the pulp hole and partially engaged with the inner thread of the pulp hole.It has a needle portion with approximately the same diameter as the pulp hole and is rotated from the outside. An air nozzle device having a needle pulp with a head that can be operated in a movable manner. An air nozzle device having a coil spring disposed between the pulp block and the head of the needle pulp. An air nozzle device in which the head is a head with a hole that can be operated with a wrench. (5) Claims! In the air nozzle device according to claim 1, the cross-sectional shape of the nozzle passage is oval or elliptical. nozzle device.