JP2574720B2 - Mold for sampling molten metal - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold for sampling molten metal used for sampling molten steel in the steel industry.

[0002]

2. Description of the Related Art Conventionally, a mold for collecting molten steel as shown in FIG. 3 has been frequently used. This collecting mold is provided with heat resistance at an inlet 2 of a split mold 1 for obtaining a coin-shaped sample. A sample introduction tube 3 made of a quartz tube is connected.

[0003] The molten steel sample S collected by the sampling mold has a shape as shown in Fig. 4 and the sample introduction portion Sa solidified in the sample introduction tube 3 hinders the analysis. There is a need to.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems and to provide a molten metal sample collecting mold capable of easily removing a sample introducing portion of a sample collected. .

[0005]

According to the present invention, there is provided a molten metal sample collecting mold according to the present invention, wherein a sample introducing tube made of quartz tube is connected to a metal mold. In the mold, a connection portion of the sample introduction tube to the metal mold is narrowed at a steep angle to a small diameter.

[0006]

In the molten metal sample collecting mold having the above-described structure, the connection portion of the sample introduction portion attached to the obtained metal sample is narrowed at a steep angle, so that it can be easily cut off at this portion. .

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the embodiments shown in FIGS. FIG. 1 shows a cross-sectional view of a sample collecting mold. A sample introducing tube 13 made of a quartz tube is connected to an inlet 12 of a metal mold 11 divided into two parts.
The connecting portion 13a to the mold 11 is narrowed to a small diameter.
In addition, air vent holes 14 are provided at a plurality of locations on the opposite side of the entrance 12 of the metal mold 11.

In order to use this sampling mold, the metal mold 11 is mounted in the tip of a holder 15 made of, for example, a paper tube, and a refractory chamotte 16 or the like is provided so that only the tip of the sample introduction tube 13 is exposed to the outside. It is fixed by. A cover 17 made of a thin metal plate is attached to the tip of the sample introduction tube 13.

In order to use the holder 15 to collect molten steel from the casting mold, the holder 15 is pressed into the casting mold. The molten steel melts the cover 17 and is introduced into the mold 11 via the sample introduction tube 13, and is filled into the mold 11 while discharging the air inside from the air vent hole 14. After the elapse of an appropriate time, the sample collecting mold is pulled up, and after waiting for some solidification time, the sample collecting mold is removed from the holder 15, the sample introduction tube 13 is split, and the molten steel sample obtained by the mold 11 is taken out. A molten steel sample S as shown in FIG.

In the molten steel sample S, since the connecting portion 13a of the sample introduction tube 13 has a small diameter at a steep angle, a sharp cut is formed between the sample body S 'and the introduction portion Sa. Since the introduction portion Sa can be easily cut off by hand at the cut portion, the sample main body S ′ can be directly applied to an instrument analyzer or the like.

[0011]

As described above, in the mold for sampling a molten metal according to the present invention, since the connecting portion of the sample introduction tube to the mold is sharply reduced in diameter, the solidification occurs in the sample introduction tube after the sample is acquired. The introduced portion can be easily cut off at an accurate position without using a cutter or the like. Therefore, the pre-furnace analysis work requiring quickness is shortened, and the dangerous work of handling the cutter is reduced.

[Brief description of the drawings]

FIG. 1 is a sectional view of an embodiment.

FIG. 2 is a perspective view of the obtained sample.

FIG. 3 is a sectional view of a conventional example.

FIG. 4 is a perspective view of the obtained sample.

[Explanation of symbols]

 11 Metal mold 12 Inlet 13 Sample introduction tube 13a Connection S molten steel sample Sa introduction

Claims (1)

(57) [Claims] In a mold for sampling a molten metal in which a sample introduction tube made of quartz tube is connected to a metal mold, a connecting portion of the sample introduction tube to the metal mold is narrowed to a small diameter at an acute angle . A mold for sampling molten metal, characterized in that: