JPS589830A - Stirrer for glass smelting and its preparation - Google Patents

Abstract

PURPOSE:When the stirring blade is fixed to the stirrer shaft for glass smelting around the outer periphery, flanges are formed on the inner edge of the blade and the blade is welded to the stirrer at the flange part to increase the weld strength at the welded part with a less amount of welding metal. CONSTITUTION:When a stirrer for glass smelting 1' is made from a noble metal such as platinum-rhodium alloy, the spiral blade of Pt-Rh alloy is bent along the inner edge at the right angle to form flange 4 and fitted to the cylindrical pipe shaft 2 of Pt-Rh alloy, the build-up welding is done between the flange 4 and the outer surface of the shaft 2. High welding strength is obtained with a less amount of Pt-Rh alloy for welding and the heat capacity increases, because of the flange, to prevent the shaft 4 from being bored by over smelting or reduction in welding strength by its thinning.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a stirring rod for glass ceramic industry and a method for manufacturing the same.

As shown in the first WJ, a conventional stirring rod 1 for the glass ceramic industry is made by fitting a spiral wing plate 3 to the outer periphery of a circular tube shaft 2 and welding the inner periphery.

By the way, it is technically difficult to weld the inner circumferential edge of the spiral blade plate 3 to the outer circumference of the tube shaft 2 in such a stirring rod l for the glass ceramic industry, and as shown in FIG. There was a problem that the inner peripheral edge of the pipe was melted too much, and a hole formed in the tube shaft 2 as shown in Fig. 2b.

For this reason, conventionally, as shown in FIG. 3, the inner peripheral edge was padded with the same material as the spiral wing plate 3 so as to be in contact with fn. However, since the spiral wing plate 3#i is made of expensive precious metal material, it would not only be extremely costly to overlay the same type of material 9, but also because the amount of overlay would be d. The contact strength was low and varied widely, making it unstable.

The present invention was made in view of the above circumstances, and includes #! It is an object of the present invention to provide a stirring rod for the glass ceramics industry, in which the volume of the contact portion is increased to the necessary minimum, and the welding strength is increased and variations are reduced and stabilized, and a method for manufacturing the same.

As shown in FIG. 4, the uninvented stirring rod for the glass ceramics industry is constructed by welding spiral vanes 3 to the outer periphery of a circular tube shaft 2 at seven flanges 4 formed on the inner periphery thereof. .

In the manufacturing method of the present invention for making such a stirring rod 1' for the glass ceramics industry, as shown in FIG. 5a, the inner periphery Im of the spiral blade plate 3 is bent at right angles to form seven flanges 4.

Next, this spiral wing plate 3 is fitted onto the outer periphery of the circular tube shaft 2 as shown in FIG. As shown in Figure 5C, it is characterized by touching the flesh.

As described above, in the glass ceramic stirring rod 1' of the present invention, the spiral vane plate 3 is welded to the outer periphery of the circular tube shaft 2 at the seven flange 4, so that IWW! Since the polyneem of the part is large and has a large heat capacity, heat is dissipated for am hours and melting is suppressed, and there is no hole in the tube shaft 2, so that the tube shaft 2 becomes thinner. There is no such thing.

In addition, a spiral flange 4 is attached to the outer circumference of the circular tube shaft 2.
When welding, the amount of overlay 9 of the same type of metal material as the vane plate 3 can be placed on both the upper and lower ends of the 7 langes 4 to the minimum necessary, so it is not only possible to suppress high costs, but also to reduce the amount of overlay 9 of the same type of metal material as the blade 3. Since there is very little variation in the amount, the welding strength is high and the variation is small and stable.

Therefore, the stirring rod 1' Fi for the glass ceramic industry of the present invention has a large resistance against the load of the spiral blades 3, and the blades 3 do not bend during use or break at the bath contact part. It is.

In order to fully clarify the effects of the stirring rod for glass ceramics according to the present invention, specific examples and conventional examples thereof will be described below.

〔Example〕

As shown in FIG.
The inner peripheral side of the wing plate 3 consisting of
This spiral wing plate 3 is then bent to form a flange with a total length of 4 mm and a thickness of 2 mm, and the spiral wing plate 3 is then bent to have a diameter of 32 wa, a thickness of 3 mm and a length of 700 mm, as shown in Figure 5b.
It is fitted onto the outer periphery of the circular tube shaft 2 made of Rh 10'W10, and then the lower end of the spiral wing plate 3 is attached to the outer periphery of the circular tube shaft 2 as shown in FIG. A stirring rod 1' for the glass ceramic industry was thus obtained.

[Conventional example]

As shown in Figure 1, the width is 50 stitches, the thickness is 2 m, and the inner diameter is 30 mm.
A spiral Pt-1thi with an outer diameter of 130 m.

- A wing plate 3 consisting of a diameter of 32 cm, a thickness of 3 aa, and a length of 700 u is Pt-R, h 10 ''/, YoD &
(circular Q) Fit onto the outer periphery of the tube shaft 2, and weld its inner periphery from above and below to create a stirrer for the glass ceramics industry! I got 1.

However, the quality of 10 IJ1 rods for the glass ceramic industry of these embodiments and the conventional example was inspected and 1. Out of 10 conventional stirring rods for glass ceramics, due to poor welding, the inner periphery of the vane plate 3 melts too much as shown in Figure 2a, or there is a hole in the tube shaft 2 as shown in the M2 diagram. In contrast, there were no such defective products in the glass ceramic stirring rod of the example.

Furthermore, the welding strength 1r-1 of the blades 3 in the stirring rods for the glass ceramic industry of these embodiments and conventional examples is determined, and the blades of the stirring rods of the conventional examples have a maximum of 21~/-1 and a minimum of 12~/- 1 average 18
In contrast, the blades of the stirring rod in the example had a maximum of 26~/"-e M as low as 20Kf/aj, and an average of 22 hours/-, and the bath contact strength was extremely high and stable with little variation. It turned out that

Furthermore, when the stirring rods for the glass ceramic industry of these embodiments and conventional examples were used in the actual glass ceramic industry, there were two stirring rods in the conventional example whose vane plates 3 were bent due to the force of the welding part. It was found that in the stirring rod of the example, the blade plate 3 did not bend downward at the @ contact portion at all, and the resistance against the load K was extremely large.

As detailed above, the stirring rod for the glass ceramic industry of the present invention has a spiral blade plate that is in contact with the outer periphery K of the circular tube shaft at the flange formed on its inner peripheral edge, so that the blade plate may be damaged due to poor welding. The bath on the inner periphery is of good quality with no holes or holes in the tube shaft, and the spiral ml! The welding strength is high and stable with little variation, and furthermore, there are excellent effects such as extremely large resistance on part of #14I against the load of the spiral blade. □ Also, according to the method for manufacturing a stirring rod for glass ceramic industry of the present invention,
There is an advantage that the stirring rod for the glass ceramic industry having the above-mentioned excellent effects can be easily produced without requiring special welding techniques.

[Brief explanation of the drawing]

Figure 1 is a partial perspective view of a conventional stirring rod for the glass ceramic industry, Figure 2
Figures a and b are enlarged cross-sectional views of welded parts showing defects in conventional stirring rods for glass ceramics, respectively, and Figure sJ3 is an enlarged cross-sectional view of welded parts of spiral blades of other conventional stirring rods for glass ceramics. FIG. 4 is a partially vertical perspective view of a stirring rod for glass ceramic industry according to the present invention;
Figure 5 a, b. C is a vertical cross-sectional view of a main part showing the steps of the method for manufacturing a stirring rod for glass ceramic industry of the present invention. 1.1'...Stirring rod for glass ceramic industry, 2...
...Circular tube axis, 3...Spiral wing plate, 4...
...72ndji. Applicant Tanaka Kikinzoku Kogyo Co., Ltd. Figure 1 Figure 2 Figure q Figure 2 Figure 3 Figure 4

Claims (1)

[Scope of Claims] l) A stirring rod for glass ceramics, which is formed by welding spiral vanes to the outer periphery of a circular tube shaft at seven flanges formed on the inner periphery of the blade. 2) Bend the inner peripheral side of the spiral blade plate at right angles to form a flange, then fit this spiral blade plate onto the outer periphery of a circular tube shaft, and then bend the spiral blade plate at a right angle. A method for manufacturing a stirring rod for glass ceramic industry, characterized by welding to the outer periphery of a circular tube shaft at the upper and lower ends of the lunge.