JPH08174184A - Device for supplying and melting casting material - Google Patents

Abstract

PURPOSE: To save an occupying space and to reduce an equipped cost by circulating an endless conveyor in the longitudinal direction, supplying casting material into a crucible in a material supplying part at the upper part, melting the material by a heating means at the intermediate part and supplying the molten metal in a molten metal supplying part at the lower part. CONSTITUTION: The cylindrical material W is carried by the conveyor 11, and heated in a preheating furnace 12 on the way of carrying, then the material is held by a holding and carrying device 13 and carried in the crucible 10 positioned in the material supplying part 2. Successively, the crucible 10 is passed through a high density power induction heating device 4 by the travelling of the endless chain 7 and the material W in the inner part is melted by the induction heating of a surrounding coil bodies 14a, 14b. At the time of coming the molten metal to the molten metal supplying part 3 at the lower part, the crucible 10 starts the tilting, and a ladle carrying device 18 linked with the ladle is stroke-shifted and the ladle 17 is faced to the molten metal supplying part 3, and the molten metal in the crucible 10 is supplied into the ladle 17. In this ladle 17, an additive of inoculant, spheroidizing agent, etc., is added and the molten metal is poured into a mold.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a melting and feeding apparatus for melting unmelted casting material for each shot to supply hot water.

[0002]

2. Description of the Related Art A device for melting one shot of a casting material in a crucible and supplying the molten metal in a mold is disclosed in Japanese Patent Laid-Open No. Sho 56-56.
There is known a device disclosed in Japanese Patent Publication No. 95463.
In this device, a horizontal rotary table provided with a plurality of crucibles at equal intervals around the circumference is provided below the raw material supply hopper, and the horizontal rotary table is rotated to sequentially feed one shot into the crucible in the raw material supply hopper. In addition to supplying raw materials, this material is melted by a high-frequency induction coil installed in the crucible, and when the horizontal rotary table rotates, the crucible is tilted when it faces above the hot water supply port to supply the molten metal inside. .

[0003]

However, in the case of the above apparatus, the horizontal rotary table requires a large installation space in the lateral direction, and since a high-frequency induction coil is provided for each crucible, the equipment cost is high. There is a problem. Also,
An air cylinder unit is provided for each crucible in order to tilt the crucible, which also leads to an increase in equipment cost.

[0004]

In order to solve the above problems, the present invention is to install crucibles at predetermined intervals with respect to an endless conveyor circulating in the longitudinal direction, and to supply a casting material into the crucible around the upper part of the endless conveyor. A material supply section for supplying the molten metal in the crucible to the ladle or the mold is provided around the lower part of the endless conveyor, and further, in the middle of the descending route from the material supply section to the hot water supply section of the crucible. A heating means was provided to melt the casting material.

Here, the heating means has a tunnel shape, one shot of casting material is supplied into the crucible, and when hot water is supplied from the crucible in the hot water supply section, the endless conveyor is used. It is possible to automatically perform this by tilting the crucible as the direction changes.

When this device is used as a device for supplying hot water to the ladle, a plurality of ladle are provided at predetermined intervals in the conveying means passing through the hot water supply unit, and the ladle is conveyed in synchronization with the tilting movement of the crucible. The material supply unit may be provided with a transfer means for supplying the casting material into the crucible, and a preheating furnace for preheating the casting material may be provided in the vicinity of the transfer means.

[0007]

[Operation] A plurality of crucibles are provided along the running direction of the endless conveyor which circulates in the vertical direction, and the casting material fed into the crucible at the material feeding section above is conveyed downward through the heating means to be melted. . By vertically circulating the endless conveyor in this manner, the vertical space can be effectively used and the horizontal space can be saved.

Further, since the crucible attached to the endless conveyor tilts along with the direction change of the endless conveyor, if tilting is used to supply hot water, no tilting drive means is required.

[0009] A plurality of ladles are provided in the conveying means passing through the hot water supply section, and the hot water can be continuously supplied by carrying it in synchronism with the tilting movement of the crucible, so that the casting material is preheated before being supplied into the crucible. If heated in a furnace, the heating capacity, the heating time, etc. by the tunnel-shaped heating means can be reduced.

[0010]

Embodiments of the present invention will be described below with reference to the accompanying drawings. Here, FIG. 1 is a schematic view of the endless conveyor as viewed from the side, FIG. 2 is a schematic view of the endless conveyor as viewed from the front, and FIG. 3 is a view taken along the line AA of FIG.

According to the present invention, for example, when a molten iron-based material is poured into a cavity of a copper alloy mold having high thermal conductivity, a shell-like solidified layer is formed on the surface of the molten metal, and the inside of the molten metal is not solidified. It is configured as a melting and feeding device of a casting method called a QC (quick casting) process in which a mold is opened and a casting cycle is repeated in a short time. With this melting and feeding device, an amount corresponding to a predetermined pouring amount for each shot is obtained. The material is melted and hot water is supplied to the inside of the crucible. By the way,
The molten metal supplied to the crucible is treated by adding additives such as an inoculant and a spherical accelerator, and then poured into the cavity.

As shown in FIG. 1, the melting and supplying device is provided with a circulating device 1 which circulates in the vertical direction. On the upper part of the circulating device 1, a material supplying section 2 is provided as shown in FIG. A hot water supply unit 3 is provided below the device 1.
Further, a high-frequency heating device 4 as a heating means is provided on the way of the descending path from the material supply part 2 to the hot water supply part 3.

As shown in FIG. 1, the circulation device 1 includes a pair of upper and lower sprockets 5 and 6, and an endless chain 7 as an endless conveyor that meshes with the sprockets 5 and 6, and the endless chain 7 has predetermined intervals. In addition, crucible holding jigs 9 ... Are provided so as to project outward through the connecting members 8 ..., and crucible holding jigs 9 ... Are attached with crucibles 10. And this crucible 1
0 ... stands upright with the opening facing upward when traveling vertically in the downward direction. The crucible 10 ...
The connecting members 8, ..., The crucible holding jig 9 ... Are formed of non-conductive ceramics, pottery, or the like.

As shown in FIG. 2, the material supply unit 2 has a conveyor 11 for conveying the undissolved cylindrical material W, and a preheating furnace 1 for heating the cylindrical material W in the middle of the conveyor 11.
2 and the cylindrical material W on the conveyor 11 to hold the crucible 10
A gripping transfer device 13 is provided as a transfer means for supplying the inside. Then, in the preheating furnace 12, the tubular material W is heated so that the temperature becomes as high as possible within a range where the gripping and transferring device 13 does not cause any inconvenience, and the cylindrical material W can be transferred in synchronization with the circulating device of the ladle.

The cylindrical material W is, for example, a powdery or preformed pig iron, a return material, an alloy, etc., which are contained in a can-shaped container at a predetermined ratio, and in the crucible 10. I try to dissolve the whole container. Of course,
Other shapes such as an ingot may be used.

As shown in FIG. 3, the high-frequency heating device 4 has a tunnel-shaped high-density coil body 1 surrounding a crucible holding jig 9 ... Which passes downward from above.
4, the base end side of the coil body 14 is supported by the mounting base 15, and the front end side is provided with an opening 16 for allowing passage of the connecting members 8. In the case of the embodiment, such a coil body 14 is composed of an upper primary heating coil body 14a and a lower higher frequency rapid melting coil body 14b as shown in FIG. After being heated to a temperature below the freezing point by the coil body 14a for melting, it is rapidly melted by the coil body 14b for rapid melting.

FIG. 4 is a diagram showing another embodiment of the high-frequency heating device 4. When the coil body 14 is integrated as in this embodiment, the number of turns of the upper coil body and the lower coil body is changed. The upper part is the primary heating coil body 14a, and the lower part is the rapid melting coil body 14b. The coil body 14 may be divided into a large number of pieces instead of being integrated.

In the hot water supply unit 3, the descending endless chain 7 begins to change direction along the sprocket 6.
Along with this, the crucible 10 is provided below a position where it tilts, and the hot water supply unit 3 is provided with a ladle carrying device 18 as a carrying means. The ladle transport device 18 is provided with a plurality of ladles 17 at predetermined stroke intervals, and a synchronizing mechanism (not shown) moves the strokes one stroke at a time in association with the tilting of the crucible 10.

The operation of the melting and feeding device as described above will be described. The cylindrical material W is conveyed by the conveyor 11, heated in the preheating furnace 12 in the middle of the conveyance, and then the gripping transfer device 1
The material is gripped by 3 and transferred into the crucible 10 located in the material supply unit 2. Here, the heating by the preheating furnace 12 is for assisting the subsequent heating by the high frequency heating device 4, and the preheating can shorten the interval between the material supply unit 2 and the hot water supply unit 3, or Although there is an advantage that the heating capacity of the high frequency heating device 4 can be reduced, it is not essential.

Next, the crucible 10 is a tunnel-shaped high-density power high-frequency heating device 4 by running the endless chain 7.
And the material W inside passes through the surrounding coil bodies 14a, 14
Dissolve by induction heating of b. Then, when reaching the lower hot water supply unit 3, the crucible 10 starts tilting, and the ladle transfer device 18 interlocked with this moves the stroke so that the hot water supply unit 3 faces the ladle 17, and the crucible 10 is placed in the ladle 17. The molten metal of is supplied. Additives such as an inoculant and a spheroidizing agent are added to the ladle 17 and poured into the mold. Further, the crucible 10 that has finished supplying hot water enters a rising process after the direction of the endless chain 7 is changed, and for example, the inside is cleaned in this rising process. In the cleaning process, the crucible faces upside down, so it is easy to remove slag and the like.

Then, in this way, the endless chain 7
Since the equipment is circulated in the vertical direction, the equipment space does not spread horizontally, and no special drive source for tilting the crucible 10 is required.

In the above embodiment, the endless chain 7 may be replaced by a belt or the like, and the hot water supply section 3 may be directly exposed to a mold instead of the ladle 17 for pouring. Good.

[0023]

As described above, the casting material melting and feeding apparatus according to the present invention circulates the endless conveyor in the longitudinal direction, provides crucibles at predetermined intervals along the running direction, and at the upper material feeding portion. Supply the casting material into the crucible,
After being melted by the heating means in the middle part, the hot water is supplied to the ladle or the mold in the lower hot water supply part, so that the equipment does not spread horizontally and the vertical space can be effectively utilized. Moreover, if the pouring is performed by utilizing the tilting movement of the crucible that accompanies the direction change of the endless conveyor, no special tilting drive means is required.

By supplying the casting material for one shot into the crucible, the casting cycle can be efficiently repeated and the variation in the weight of each shot becomes very small, which leads to an increase in the yield. Further, by heating in a preheating furnace before supplying to the crucible, it is possible to reduce the heating time, heating capacity, etc. of the heating means after that, and if the ladle is conveyed in conjunction with tilting of the crucible, Smooth pouring can be performed continuously.

[Brief description of drawings]

[Figure 1] Side view of the endless conveyor

FIG. 2 is a schematic view of the endless conveyor as seen from the front.

FIG. 3 is a view taken along the line AA of FIG.

FIG. 4 is a diagram showing another embodiment of the high-frequency heating device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Circulation apparatus, 2 ... Material supply section, 3 ... Hot water supply section, 4 ... High-density electric power high-frequency heating apparatus, 7 ... Endless chain, 10
... crucible, 12 ... preheating furnace, 13 ... gripping transfer device, 17
… Ladle, 18… Ladle transport device.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Internal reference number FI technical display location // B22D 17/28 A (72) Inventor Masayoshi Yasuda 1-10 Shin-yama, Sayama-shi, Saitama Inside the Saitama Factory of Honda Motor Co., Ltd.

Claims (6)

[Claims] 1. A crucible is attached to an endless conveyor that circulates in a vertical direction at predetermined intervals, a material supply unit for supplying unmelted casting material into the crucible is provided around the upper end of the endless conveyor, and a lower part of the endless conveyor. A hot water supply part for supplying the molten metal in the crucible into the ladle or the mold is provided in the periphery, and a heating means for melting the casting material in the crucible is provided in the middle of the descending path from the material supply part to the hot water supply part. Characteristic casting material melting and feeding device. 2. The melting and feeding apparatus for casting material according to claim 1, wherein the heating means has a tunnel shape through which the crucible can pass. 3. The melting and feeding apparatus for a casting material according to claim 1 or 2, wherein one shot of the casting material is fed into the crucible. 4. The apparatus for melting and supplying a casting material according to claim 1, wherein hot water is supplied from the crucible in the hot water supply section automatically by tilting the crucible as the endless conveyor changes its direction. A casting material melting and feeding device characterized by: 5. The casting material melting / supplying device according to claim 4, wherein the melting / supplying device is configured as a device for supplying hot water to the ladle, and the ladle is placed at a predetermined interval on a conveying means passing through the hot water supply unit. A casting material melting and feeding apparatus, wherein a plurality of the casting materials are conveyed in synchronism with the tilting movement of the crucible. 6. The apparatus for melting and supplying a casting material according to claim 1, wherein the material supplying section is provided with a transfer means for transferring the casting material into the crucible, and the transfer means is provided in the vicinity of the transfer means. A preheating furnace for preheating a casting material is provided, and a melting and feeding apparatus for the casting material.