JPH06344122A - Molten metal pouring trough - Google Patents

Abstract

PURPOSE:To providing a molten metal trough preventing molten metal from being burnt-stuck onto a chute are prevented and unnecessitating a mold coating work for every casting. CONSTITUTION:The chute 11' forming a pouring hole for molten metal 4 is constituted of a chute body 21 formed with a copper plate having U-shaped cross section opened upward and a water cooling jacket 25 through which the cooling water is allowed to flow substantially on the whole surface along the cross sectional surface of this chute body 21. The chute body 21 is cooled over the whole length with cooling water, and since the chute body 21 is made of the copper plate having high terminal conductively, the chute 11' is satisfactorily cooled by keep the dropping position of the molten metal at the low temp., therefore the molten metal can be prevented from being burnt-stuck onto the chute 11' and the erosion from being occurred. Further, brushing work of mold coating material and repairing work for the burnt-sticking of the molten metal and the erosion is unnecessitated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pouring trough for casting molten metal into a mold.

[0002]

2. Description of the Related Art For example, when centrifugally casting a cast iron pipe, a pouring trough 2 is placed inside a rotary mold 1 as shown in FIG.
It is customary to insert the molten metal 4 from the triangular ladle 3 into the mold 1 through the pouring trough 2.

The pouring trough 2 comprises a chute 11 into which the molten metal 4 is poured, a trough body 12 for guiding the molten metal 4 poured into the chute 11 into the mold 1, and a sport 13 at the tip. . The chute 11 is for pouring the molten metal 4 from the triangular ladle 3 into the trough body 12 with a force, and is usually made of cast steel.

After the molten metal 4 is cast by using the pouring trough 2 as described above, in order to prevent the seizure of the chute 11, the chute 11 is coated with a graphite-type mold material by brush or the like every time. There is. Also, with this graphite-based coating material,
When the chute 11 is turned over after casting, excess pig iron (jam) is completely removed.

[0005]

However, in the conventional pouring trough 2, since the chute 11 is coated with a graphite-based mold coating material by brushing each time, one worker is required for this mold coating work each time. Also, there is a problem in that the work environment is bad, and the worker is forced to perform harsh work. Further, although the coating material is applied, there is a problem that seizure and melting damage are likely to occur due to the fall of the molten metal 4, and repairing thereof requires time and effort. Further, when the mold coating material peels off, it enters the product together with the molten metal 4, which may affect the quality and cause defects.

The present invention solves such problems, and an object thereof is to provide a pouring trough which prevents seizure of a chute, eliminates the work for each casting, and prevents product defects. To do.

[0007]

In order to achieve the above object, a pouring trough of the present invention is a pouring trough comprising a chute into which molten metal is poured and a trough body for guiding the molten metal poured into this chute into a mold. The chute is composed of a chute main body formed of a U-shaped copper plate having a cross section open upward, and a water cooling jacket for flowing cooling water over substantially the entire cross section of the chute main body. It is characterized by that.

[0008]

With this structure, the water cooling jacket causes cooling water to flow over substantially the entire cross section of the chute body, and the chute body is formed of a copper plate having a high thermal conductivity. Is effectively cooled by cooling water, and the chute is kept at a low temperature.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. It should be noted that the same configurations as those of the conventional example shown in FIG.

FIG. 1 is a perspective view of a chute of a pouring trough in one embodiment of the present invention, FIG. 2 is a sectional view taken along line AA of FIG. 1, and FIG. 3 is a sectional view taken along line BB of FIG. As shown in the figure, the chute main body 21 is a U-shaped copper plate having a relatively thin wall and a substantially uniform wall thickness, and the cross-section of which is open upward. It is formed by bending and sloping at a wide angle, and the cross section of the inlet side of the molten metal 4 from the triangular ladle 3 is wide,
The exit side is narrowed. Further, on the outside of the chute body 21, a concave cover 22 having a gutter-shaped cross section is provided over the length direction of the chute body 21, and both upper ends of the cover 22 are provided.
22a, 22a are welded and fixed to both upper ends 21a, 21a of the chute body 21. The cover 22 is made of an iron plate. Further, a plate material 24 formed of an iron plate is welded and sealed on the base end side (triangle ladle 3 side) and the tip end side (trough body 12 side) of the cover 22 and the chute body 21, respectively. A water cooling jacket 25 is formed on the outside of the.

A cooling water discharge port 26 is formed in the water cooling jacket 25 at the base end side of the chute body 21, and a cooling water supply pipe 27 made of copper is inserted therein. The cooling water supply pipe 27 extends in the lengthwise direction of the chute body 21 inside the water cooling jacket 25 and opens at the tip side of the chute body 21. The chute 11 'of the pouring trough of the present invention is composed of the chute body 21 and a water cooling jacket 25.

In such a structure, the cooling water supply pipe 27
When the cooling water is flown into the cooling water supply pipe 27, the cooling water flows through the inside of the cooling water supply pipe 27 toward the tip side of the chute body 21, and is discharged into the water cooling jacket 25 through the opening at the tip. Then, the water flows inside the water cooling jacket 25 outside the cooling water supply pipe 27 toward the base end side of the chute body 21, and at that time, the chute body 21 is cooled. Then, it is discharged from the discharge port 26 to the outside of the system. When the flow of cooling water is stagnant and the water temperature becomes abnormally high, an alarm is issued by an abnormal water temperature alarm device (not shown) so that the abnormal water temperature can be dealt with immediately.

In this way, during and after casting, the chute body 21 is cooled by the cooling water over the entire length, and since the chute body 21 is formed of a copper plate having a high thermal conductivity, the chute 11 'is well cooled. The molten metal falling part is kept at a low temperature. Further, since the contact time with the molten metal is relatively long, low-temperature cooling water can be supplied to the tip portion of the chute body 21 that easily becomes hot, and the tip portion of the chute body 21 is effectively cooled.

Therefore, the distortion of the shape such as the warp of the chute 11 'due to the molten metal can be suppressed, and the seizure and the melting loss of the molten metal on the chute 11' can be prevented. In addition, it is possible to save labor and eliminate the need to perform harsh work on the worker, because the conventional work of brush painting of the mold coating material, seizure of the molten metal, and repair work of melting damage are unnecessary. . Further, the mold material is prevented from peeling off and entering the product together with the molten metal, so that the quality of the product can be maintained.

[0015]

As described above, according to the present invention, the chute body is formed of a copper plate having a high thermal conductivity by causing the cooling water to flow over substantially the entire cross section of the chute body by the water cooling jacket. As a result, the chute body can be effectively cooled by the cooling water, and the chute can be kept at a low temperature. Therefore, it is possible to suppress the seizure and the adhesion of the molten metal on the chute.
In addition, it is possible to save labor and eliminate the need to perform harsh work on the worker, because the conventional work of brush painting of the mold coating material, seizure of the molten metal, and repair work of melting damage are unnecessary. . Further, the mold material is prevented from peeling off and entering the product together with the molten metal, so that the quality of the product can be maintained.

[Brief description of drawings]

FIG. 1 is a perspective view of a chute of a pouring trough according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG.

FIG. 4 is a diagram illustrating a usage state of a conventional pouring trough.

[Explanation of symbols]

 1 mold 2 pouring trough 3 triangular ladle 4 molten metal 11 'chute 12 trough main body 21 chute main body 22 cover 24 plate material 25 water cooling jacket 26 drain port 27 cooling water supply pipe

Claims (1)

[Claims] 1. A pouring trough comprising a chute into which the molten metal is poured and a trough body for guiding the molten metal poured into the chute into a mold, wherein the chute has a U-shaped cross section open upward. A pouring trough comprising a chute body formed of the copper plate and a water cooling jacket for flowing cooling water over substantially the entire cross section of the chute body.