JP2947294B2 - Method of manufacturing a bushing for forming fibers - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a fiber-forming bushing in which a raw material of an inorganic fiber such as glass in a high-temperature molten state flows out from a number of nozzles and is spun.

[0002]

2. Description of the Related Art A bushing for forming a fiber is provided with a number of nozzles projecting from the bottom of a boat-shaped vessel made of Pt or a Pt alloy into which a molten fiber material is to be charged. The fiber-forming bushing is configured so as to have a fiber shape at the tip of the fiber. A method of attaching a nozzle to a bottom plate in such a bushing for forming a fiber is described in JP-B-45-2329 and JP-B-59-125.
No. 265. That is, FIG.
As shown in FIG. 4, a stud-shaped nozzle element 4 is formed by integrally integrating a foot portion 1 and a frusto-conical portion 3 having a step portion forming a large-diameter surface 2. The nozzle element 4 is shown in FIG. The foot 1 is locked in a hole 6 having a diameter of about 2 mm formed in the bottom plate 5 as shown in the figure. In this locking, a Pt solder for welding is used as a washer 7 having a thickness of about 0.2 mm. But at this time,
The washer 7 is used alone as shown in FIG. 5 and is positioned as shown in the left two rows of FIG. 6 and locked as shown in FIG. 7, or as shown in FIG. As shown in FIG. 9, the nozzle element 4 is aligned and locked as shown in FIG. 10, and the nozzle element 4 is locked in all the holes formed in the bottom plate 5 in this manner.
The bottom plate 5 and the periphery of the nozzle element 4 are heated to melt the washer 7 so as to be integrally formed. Thereafter, as shown in FIG. 11, a hole is formed in the center of each nozzle element 4 to form a bushing for forming fibers. However, according to such a conventional technique, when locking the nozzle element 4 to the bottom plate 5, the nozzle element 4
Caulking the tip of the foot 1
When the caulking is performed, the accuracy of the caulking is poor due to the presence of the washer 7 between the nozzle element 4 and the bottom plate 5. Deviation occurs.
For this reason, the alignment state of the nozzle element 4 after the heat welding becomes poor, and when the nozzle element 4 is actually used because the tip of the nozzle element 4 is unevenly formed in the later drilling of the nozzle element 4, inconvenience occurs at the time of forming the glass fiber. Results. Also, since the washer 7 is arranged around the hole in the bottom plate, the molten Pt solder flows around the hole in the bottom plate during heat welding, so that it does not enter the hole and is used for welding in the thickness direction. Insufficient portions are likely to occur, resulting in durability problems.

[0003]

The problem to be solved is that the nozzle element is welded with sufficient strength without the center position being shifted or inclined with respect to the bottom plate.

[0004]

Means for Solving the Problems The present invention, Tables with part or the entire circumference to advance Pt wax layer of the outer periphery of the leg portion of the nozzle element
A layer is formed, the feet of the nozzle element are directly fitted into the holes formed in the bottom plate, caulked and locked, heated to melt the Pt brazing layer, and the nozzle element is fixed to form a whole, and thereafter Each
By drilling a hole in the center of the chisel element , the nozzle element can be accurately positioned in the hole formed in the bottom plate, and the foot can be securely fixed.

[0005]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of the nozzle element, and FIG. 2 is a sectional view showing a state where the nozzle element is fitted in a hole of a bottom plate.
A% Rh-Pt alloy wire is formed on the nozzle element 8 by header processing, and a Pt pipe 10 having a thickness of 0.1 mm is fitted and brought into close contact with the foot portion 9 of the nozzle element 8. After fitting into the hole 6 of the bottom plate 5 of the fiber forming bushing, caulking the tip of the foot 9 and locking the same, the area around the nozzle element 8 is heated with a burner or the like to remove the surface Pt brazing layer 10. Melt to make it all integral. Thereafter, each nozzle element 8
A hole was made in the center of the sample to form a fiber-forming bushing.

[0006]

According to the present invention described in detail above, a Pt brazing layer is formed on a part or the entire periphery of the foot of the nozzle element, and the foot of the nozzle element is directly fitted into the hole of the bottom plate. Then, after heating, the Pt brazing layer was melted to form a whole, so that the nozzle element was not eccentrically fixed to the hole in the bottom plate, and the alignment state was extremely good. When drilling is performed at the center, there is an effect that a good nozzle can be formed without uneven thickness at the nozzle tip. In addition, by forming a Pt brazing layer around the foot and fitting it into the hole of the bottom plate, the welding state of the foot and the hole is ensured, the finish is good, and a durable fiber forming bushing is obtained. be able to.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a nozzle element of the present invention.

FIG. 2 is a cross-sectional view showing a state where a nozzle element is fitted in a hole of a bottom plate.

FIG. 3 is a perspective view showing a conventional example of a nozzle element.

FIG. 4 is a plan view of a bottom plate.

FIG. 5 is a perspective view of a washer.

FIG. 6 is a plan view showing an attached state of a nozzle element.

FIG. 7 is a cross-sectional view of a state where the nozzle element is fitted in a hole of a bottom plate.

FIG. 8 is a plan view of a continuous sheet.

FIG. 9 is a plan view showing an attached state of a nozzle element.

FIG. 10 is a cross-sectional view showing a state where the nozzle element is fitted into a hole of the bottom plate.

FIG. 11 is an explanatory view showing a state where drilling is performed at the center of the nozzle element.

[Explanation of symbols]

 5 bottom plate 6 hole 8 nozzle element 9 foot 10 Pt brazing layer

Continued on the front page (72) Inventor Yasuhiro Sagara 2-9-12 Kaji-cho, Chiyoda-ku, Tokyo Inside the Tokuriki Main Store (72) Inventor Hideo Matsunawa 2-9-1, Kaji-cho, Chiyoda-ku, Tokyo Inside the main store (72) Inventor Kazuo Kondo 2-9-1-2 Kaji-cho, Chiyoda-ku, Tokyo Inside the Tokuriki Main Store (72) Inventor Takashi Nara 2-9-1, Kaji-cho, Chiyoda-ku, Tokyo Tokuriki Main Store (72) Inventor Shigeru Tanaka 2-9-12 Kaji-cho, Chiyoda-ku, Tokyo Inside Tokuriki Main Store Co., Ltd. (56) References JP-B-60-56590 (JP, B2) (58) Fields investigated (Int.Cl . ⁶ , DB name) D01D 4/00-4/02

Claims (1)

(57) [Claims] 1. A stud-shaped Pt alloy nozzle element in which a foot portion and a frusto-conical portion having a step portion having a large diameter surface following the foot portion are integrated, a bottom plate of a Pt alloy fiber-forming bushing. pre Pt filtration of holes in fitted by the method for producing a fiber-forming bushing to all integrally with Pt wax, part of the outer periphery of the leg portion of the nozzle element or the entire circumference
The surface of the nozzle layer is formed, and the feet of the nozzle element are directly fitted into the holes in the bottom plate and caulked and locked , and then heated to melt the Pt brazing layer and fix the nozzle element, thereby completely integrating the nozzle element. And subsequently drilling a hole in the center of each nozzle element.