JPH06254658A - Method for casting ingots having two or more kinds of different shapes - Google Patents

Abstract

PURPOSE:To efficiently produce ingots having two or more kinds of different shapes of zinc, such as zinc anode, and zinc alloy product, and the other nickel, chromium, copper and these alloy products in special shapes and produced in the production of many kinds in small quantities. CONSTITUTION:The shapes of a molds M carried to a pouring position by a mold conveyor 120 endlessly circulated are beforehand detected. Based on the detected shapes, the molten metal pouring inclination angle theta of a molten metal pouring vessel 2 is adjusted to make the molten metal quantity poured from the molten metal pouring vessel 2 the suitable quantity, and the molten metal is poured into the mold M.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a casting method for continuously producing ingots having two or more different shapes with a single casting apparatus. The present invention is particularly applicable to the production of plate-shaped zinc and zinc alloy products (hereinafter referred to as “zinc anodes”) and the like used as electrodes in electrogalvanizing performed to protect iron products and the like from corrosion. The present invention relates to a casting method that can be preferably used.

[0002]

2. Description of the Related Art As a zinc anode used for electrogalvanizing, a plate-shaped, lump-shaped, ball-shaped or the like is used, but a plate-shaped one is generally used. As shown in FIG. 6, the plate-shaped zinc anode 100 has a substantially rectangular shape, and is used by being suspended in a plating bath during galvanizing, so that a through hole 102 is provided at one end. ing. Further, since the plate-shaped zinc anode 100 has a proper length according to the depth of the plating bath, various lengths L are manufactured, for example, between 350 mm and 1300 mm. There is. However, the usage of each type is small. Also, the weight per sheet is from a few Kg to 20K.
It is about g.

Conventionally, general plate-shaped zinc and zinc products are
It is often manufactured by using an endless type mold conveyor that moves endlessly, transporting the mold to the pouring position with this mold conveyor, and pouring the molten metal into each mold at the pouring position. It is also efficient.

However, as described above, the plate-shaped zinc anode 100 used for electrogalvanizing has a special shape and many types, and the production amount per type is small in comparison with that. No endless mold conveyor is used, flat molds are lined up on the table,
It is manufactured by pouring molten metal by hand and then reversing and extracting the mold. It may also be manufactured by a turntable method using a matching mold.

[0005]

The above-mentioned manual manufacturing has a very low production efficiency, and the working environment is high, and the work load on the worker is heavy because of handling heavy objects.

Further, in the case of a turntable system using a matching type mold, a sprue is always formed, casting is easy, and a finishing process for removing this is required, which is a problem in work efficiency. Also, in the past, JP-A-50-1025
As described in Japanese Patent No. 24, a turntable type casting machine for continuously casting is proposed, but it is necessary to manually pick up and stack products falling below the mold when the mold is opened, which is so efficient. It is not implemented and not implemented.

As described above, it is more efficient and desirable to use an endless mold conveyor as a casting apparatus for manufacturing such an ingot, but it is not suitable for high-mix low-volume production. It is possible to install such a casting apparatus for each product, but this is not effective because the amount of capital investment is large and the operating rate of the equipment is low.

Accordingly, it is an object of the present invention to produce two or more different products such as zinc and zinc alloy products such as zinc anodes, and other nickel, chromium, copper and alloy products thereof, which are produced in a variety of products in small quantities with special shapes. It is an object of the present invention to provide a manufacturing method capable of efficiently manufacturing a shaped ingot with a single casting apparatus using a mold conveyor, and reducing the work load of a worker.

[0009]

The above object is achieved by a casting method for producing two or more differently shaped ingots according to the present invention. In summary, the present invention is a method of manufacturing ingots of two or more different shapes by a single casting apparatus, in which the shape of a mold conveyed to a pouring position by an endlessly circulating mold conveyor is detected in advance, With this, by adjusting the molten metal sampling inclination angle of the molten metal sampling container, the molten metal sampled by the molten metal sampling container is set to an appropriate amount that matches the shape of the mold, and the molten metal is poured into the mold. Is a method of casting ingots of two or more different shapes. The molten metal sampling container is immersed in a holding furnace in which the contained molten metal amount is maintained at a constant molten metal level at a predetermined inclination angle and then pumps up a predetermined amount of molten metal. Further, preferably, the level of the molten metal in the holding furnace is controlled by controlling the operation of a metal pump for feeding the molten metal contained in the molten metal pot to the holding furnace by a signal from a level meter provided in the holding furnace. .

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A casting method for producing ingots of two or more different shapes according to the present invention will be described below in more detail with reference to the drawings. In the present embodiment, the ingot is as shown in FIG.
The zinc anode 100 used for electrogalvanizing as shown in FIG. 1 will be described as one in which two types of zinc anodes having different lengths are cast. However, the manufacturing method of the present invention is
It is not limited to the manufacturing method of these zinc anodes.

FIG. 4 schematically shows the overall construction of an embodiment of a casting apparatus for carrying out the manufacturing method of the present invention.

In this embodiment, the casting apparatus has an endless type mold conveyor 120 which is wound around sprocket wheels 121 and 122 and moves endlessly. The construction and operation of this mold conveyor 120 is well known to those skilled in the art,
Further detailed description will be omitted. This mold conveyor 1
20 carries the mold M on its surface, and therefore, the mold conveyor 120 moves endlessly to cause the mold M to move.
Is sequentially conveyed to the pouring position I, the cooling position II, and the casting position III.

A pouring device 1 is installed at the pouring position I and pours an appropriate amount of molten metal into the mold M conveyed by the mold conveyor 120.

In FIG. 4, a large amount of molten pure zinc (molten metal) is contained in a molten metal pot 130 provided adjacent to the pouring device 1, and this pure zinc is contained in the metal pump 132. By this, it is fed to the cushion pot (holding furnace) 140 through the charging trough 134. The holding furnace 140 has a level meter (not shown), and is controlled so that the metal pump 132 is operated (ON) at the lower limit of the level meter and stopped (OFF) at the upper limit of the level meter. As a result, the molten metal level in the holding furnace 140 is always maintained constant.

With reference to FIGS. 1 to 3, the pouring device 1 is
It is provided with a molten metal collection container 2 having an open upper part, and this molten metal collection container 2 can be loaded into a holding furnace 140 by a hydraulic cylinder 4 to pump up a predetermined amount of molten metal. Further, to explain, the molten metal collection container 2 is attached to a slider arm 6, and the slider arm 6
Is slidable vertically by the hydraulic cylinder 4 along the slider guide 8.

Further, the slider guide 8 is supported by a swing support arm 10. This swing support arm 10 is
The hydraulic cylinder 12 is swingable around a fulcrum 14. Therefore, the molten metal collection container 2 is provided with the hydraulic cylinder 12
The tilt angle (θ) in the holding furnace 140 can be adjusted by operating the. As mentioned above,
Since the molten metal level H in the holding furnace 140 is always kept constant, it is collected by the molten metal collecting container 2 by changing the inclination angle (θ) of the molten metal collecting container 2 immersed in the holding furnace 140. The amount of molten metal can be controlled.

In this embodiment, as shown in FIG.
When casting the zinc anode 100 having a length of 00 mm, the slide guide 8 is tilted by the hydraulic cylinder 12.
That is, the inclination of the molten metal collection container 2 is θ = 57 degrees (a indicated by the solid line
State), or when casting the zinc anode 100 having a length of 400 mm, by changing the inclination to θ = 41 degrees (b state shown by the chain double-dashed line), the amount of molten metal pumped by the molten metal sampling container 2 can be changed. did it.

The pumped molten metal is further moved by the hydraulic cylinder 12 so that the slide guide 8 and the molten metal collection container 2 are further horizontal, for example, 4 to 8 degrees, preferably 5.5.
By inclining by 6.5 degrees (indicated by the chain double-dashed line c), the molten metal is poured into the mold M on the casting conveyor 120 through the pouring gutter 20. At this time, the pouring gutter 20 also supports the fulcrum 2 with the hydraulic cylinder 22 so that the molten metal easily flows into the mold M.
It is preferably tilted around 4.

The operation of the casting apparatus having the above structure will be described. As described above, the casting conveyor 120 is provided with the two types of molds M for manufacturing the two types of zinc anodes 100. With a detection device (not shown),
The size of the mold M conveyed to the pouring position I is detected. Therefore, in the pouring device 1, the inclination of the slide guide 8 in the hydraulic cylinder 12, that is, the inclination of the molten metal collection container 2 is changed to a preset angle according to the size of the mold M by this detection signal.

Next, the molten metal sampling container 2 is set to the molten metal level H.
Of the hydraulic cylinder 4 into the holding furnace 140 in which the
, And the amount of molten metal corresponding to the size of the mold M is pumped up. In synchronization with the movement of the mold conveyor 120,
The molten metal collection container 2 is tilted by the hydraulic cylinder 12, whereby the molten metal in the container is poured into the mold M through the injection trough 20. According to the present embodiment, the mold conveyor 120 has two zinc anodes 10 simultaneously, as shown in FIG.
In order to cast 0, a pair of molds M, M are arranged, and accordingly, a molten metal collection container 2 and a pouring gutter 20 are also provided in a corresponding pair.

In FIG. 4, the mold M to which the molten metal has been poured is conveyed through the cooling region II as the mold conveyor 120 moves, whereby the molten metal is completely cooled and solidified. The mold M is inverted at the end of the mold conveyor, and the mold M faces downward and is conveyed to the embossing area III. In the stamped area III, the mold M is completely oriented downward, and the zinc anode 100 is extracted from the mold M by the stamping means 200.

In this embodiment, since the zinc anode 100 has the through hole 102, the portion of the through hole 102 shrinks during the solidification and tightly fits into the mold as shown in FIG. 5 (A). , It is difficult to come out of the inverted mold M, and FIG.
(B) is likely to occur. Normally, the back side of the mold is hit and pulled out, but in this state, the portion of the through hole 102 becomes a resistance, so it cannot be pulled out even if it is hit hard. Therefore, as shown in FIG.
The side without 2 is pushed up from below by the pushing-up means 201, and the zinc anode 100 is pressed against the mold M.
The side having the through hole 102 can be completely extracted by striking from the back side of the mold with the striking means 200.

Zinc anode 10 extracted from the mold M
0 is a guide plate 202 provided at a slight distance from the mold M.
Fall on. The falling zinc anode 100 is pushed by the mold M on the guide plate 202, and is pushed out by an extruder (not shown).
Then, it is conveyed to a predetermined place by a transfer conveyor (not shown).

[0024]

As described above, according to the manufacturing method of the present invention, when two or more kinds of ingots having different shapes are manufactured by one casting machine, the casting position is moved to the pouring position by the endless circulating mold conveyor. The shape of the mold being conveyed is detected in advance, and the tilt angle of the molten metal in the molten metal collection container is adjusted accordingly, and the amount of molten metal sampled by the molten metal collection container is set to an appropriate amount for the mold shape. Since it is configured to pour in the molten metal, it has a special shape and can produce a wide variety of products in small quantities. Zinc and zinc alloy products such as zinc anodes, as well as nickel, chromium, copper and their alloy products.
Ingots of different shapes of more than one species can be efficiently manufactured with one casting device using a mold conveyor,
The work load of the worker can be reduced.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view showing a pouring device portion of a casting device for carrying out a manufacturing method according to the present invention.

FIG. 2 is a cross-sectional view for explaining the operation of the pouring device of FIG.

FIG. 3 is a plan view of the pouring device shown in FIG.

FIG. 4 is a schematic configuration diagram of a casting apparatus for carrying out the manufacturing method according to the present invention.

FIG. 5 is a process diagram illustrating a method of driving an ingot from a mold.

FIG. 6 is a perspective view of a zinc anode.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Molten metal pouring device 2 Molten metal container 4 Hydraulic cylinder 6 Slider arm 8 Slider guide 120 Mold conveyor 130 Molten pot 140 Holding furnace 200 Ejection means 201 Push-up means

Claims (3)

[Claims] 1. In a method for producing ingots of two or more different shapes by a single casting apparatus, the shape of a mold conveyed to a pouring position by an endlessly circulating mold conveyor is detected in advance, and Two types characterized in that the molten metal sampling inclination angle of the molten metal sampling container is adjusted so that the amount of molten metal sampled by the molten metal sampling container is appropriate for the shape of the mold, and the molten metal is poured into the mold. The above method for casting ingots having different shapes. 2. The casting according to claim 1, wherein the molten metal sampling container is immersed in a holding furnace in which a contained molten metal amount is maintained at a constant molten metal level at a predetermined inclination angle and a predetermined amount of molten metal is pumped up. Method. 3. The operation of a metal pump for feeding the molten metal in the molten metal pot to the holding furnace is controlled by a signal from a level meter provided in the holding furnace, thereby keeping the molten metal level in the holding furnace constant. The casting method according to claim 2.