JP2017170476A - Ingot manufacturing method, ingot, and casting mold - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ingot manufacturing method, an ingot, and a casting mold, with which ingots of different weight can be manufactured without requiring a large scale facility and without spending an enormous amount of time on preparation.SOLUTION: A continuous casting machine is provided with a casting mold 12 which includes a groove 12b communicating between plural recesses 12a having a first depth dand neighboring recesses 12a having a second depth d. When casting an ingot of a first weight, the continuous casting machine casts the ingot by supplying the casting mold 12 with molten aluminium of an amount not overflowing from the recesses 12a to the groove 12b, whereas in the case of casting an ingot of a second weight, the continuous casting machine supplies the casting mold 12 with molten aluminium of an amount overflowing from the recesses 12a to the groove 12b and casts an ingot having a shape corresponding to a space in which the neighboring recesses 12a are joined by the groove 12b.SELECTED DRAWING: Figure 6

Description

  The present invention relates to an ingot manufacturing method, an ingot and a mold for casting a metal ingot using a continuous casting machine.

  Conventionally, a metal material such as aluminum has been cast into an ingot and conveyed. Such an ingot is manufactured by a continuous casting machine, for example.

  The continuous casting machine continuously arranges ingot molds on an endless conveyor, and continuously supplies molten aluminum to a mold transferred by the conveyor at a predetermined supply position (see Patent Document 1).

  By the way, in a factory for manufacturing parts using such an aluminum ingot, an ingot having a weight of, for example, about 5 kg has been conventionally introduced into a melting furnace as necessary. It is required to manage the ingot input in a unit weight smaller than the weight of the ingot, for example, a unit of about 1 kg. On the other hand, there are cases where it is required to manage the charging of the ingot not in such a fine unit but in a unit of about 2.5 kg. In addition, it may be required to manage the ingot input in finer units, in units of 100 g.

JP 2009-108346 A

  On the side of manufacturing and supplying such an ingot, for example, an ingot weighing about 1 kg and an ingot weighing about 2.5 kg are divided into separate lines, and the continuous casting machine of each line is used for heavy weight. It is conceivable to cast ingots of different sizes, but each requires separate equipment, and the equipment becomes large.

  Further, on the side of manufacturing and supplying the ingot, for example, when an ingot having a weight of about 1 kg is manufactured or an ingot having a weight of about 2.5 kg is manufactured, the mold used in the continuous casting machine is changed. However, it takes a lot of time for setup. Usually, such a continuous casting machine has a large number of molds per unit, and considering the amount of work for removing the mold and fixing another mold, it is not practical to replace the mold. .

  In view of the circumstances as described above, an object of the present invention is to provide an ingot manufacturing method capable of manufacturing ingots having different weights without requiring large-scale equipment and without requiring a lot of time for setup. It is to provide an ingot and a mold.

  In order to achieve the above object, an ingot manufacturing method according to an aspect of the present invention includes a continuous casting machine having a plurality of concave portions having a first depth and a second depth shallower than the first depth. In the case where a mold provided with a groove communicating between at least two adjacent recesses is disposed and an ingot having a first weight is cast, the mold disposed in the continuous casting machine is moved from the recess to the mold. When casting an ingot by supplying an amount of molten metal that does not overflow into the groove, and casting an ingot having a second weight that is heavier than the first weight, a mold disposed in the continuous casting machine is used. An amount of molten metal overflowing from the recess to the groove is supplied, and an ingot having a shape corresponding to a space in which the adjacent recesses are connected by the groove is cast.

  In the ingot manufacturing method according to the present invention, by changing the amount of molten metal supplied to the mold, for example, a mold capable of casting an ingot having a weight of up to about 1 kg with one recess is used as it is from the recess to the groove. It is possible to manufacture an ingot having a weight of, for example, about 2.5 kg by supplying an overflowing amount of molten metal and casting an ingot having a shape corresponding to a space in which adjacent recesses are connected by a groove. That is, it is possible to produce two types of ingots having different weights without changing the setup with a single facility. As a result, ingots having different weights can be manufactured without requiring large-scale equipment and without taking a lot of time for setup.

  Here, changing the amount of molten metal supplied to the mold can be easily dealt with by reducing the speed of the conveyor for feeding the mold of the continuous casting machine or changing the flow rate of molten metal supplied to the mold.

  The ingot which concerns on one form of this invention is an ingot manufactured by this manufacturing method, Comprising: It has a shape according to the space which connected between the said recessed parts with the said groove part.

  This ingot has a merit that the surface area is larger than that of a normal ingot and the melting speed when used in a melting furnace is increased. In addition, the tower-type melting furnace has the advantage of increasing the efficiency of heat exchange with the exhaust gas.

A mold according to an embodiment of the present invention is a mold used in this manufacturing method, and has a recess having a first depth and a second depth shallower than the first depth, and at least two adjacent ones. The groove part which connects between the said recessed parts to perform is provided.
As a result, ingots having different weights can be manufactured without requiring large-scale equipment and without taking a lot of time for setup.

  Here, in the ingot manufacturing method according to an aspect of the present invention, the casting mold is connected to the continuous casting machine and disposed near the point where molten metal is supplied to the continuous casting machine. The point which conveys the pressure type ladle which stores the molten metal, calculates the weight of the molten metal stored in the pressure type ladle, and supplies the molten metal from the pressure type ladle to the continuous casting machine In addition, the inside of the pressure ladle is added based on the calculated weight of the molten metal so that an amount of molten metal per unit time corresponding to the first weight or the second weight is supplied. Calculate the pressure to press, pressurize the inside of the pressurization ladle with the calculated pressure, to supply the molten metal from the pressurization ladle to the point, from the point via the flow path Continuous supply of molten metal to the connected molds

  In one aspect of the present invention, a pressure-type ladle having portability is transported near a point where molten metal is supplied to the continuous casting machine, and the molten metal is directly supplied from the pressure-type ladle directly to the continuous casting machine. Therefore, there is no need for a holding furnace (melting furnace) or a flow path such as a rod connecting this to a continuous casting machine. Therefore, the facility does not become large. Further, even if there is a change in layout or operation, it is not necessary to reconfigure the flow path such as a bag, so it is possible to easily cope with changes in layout and operation. In other words, by supplying molten metal to the continuous casting machine with a pressure ladle, there is no need for a holding furnace or long and complicated dredging, and the continuous casting machine can be arranged flexibly. The combination of holding furnace and continuous casting machine Will also be free. In addition, when the molten metal holding furnace functions substantially as a pressure ladle, and multiple continuous casting machines are installed in the factory, the pressure ladle is transported to each continuous casting machine. Therefore, it is easy to adjust the increase and decrease of the production amount and it becomes efficient. In addition, the pressure ladle does not need to be suspended by a crane or the like, and is extremely safe. In the case of a tilting ladle, a stable amount of molten metal cannot be continuously supplied. Therefore, this type of system is not suitable, and equipment for tilting is necessary. It becomes. On the other hand, since the pressurized ladle can supply molten metal to the point by pressurization using air in the factory, the equipment does not become large.

  And in the continuous casting machine which concerns on this method, it is requested | required that the fixed amount of molten metal according to 1st weight or 2nd weight should be supplied continuously. In one embodiment of the present invention, the molten metal is supplied by pressurizing the inside of the pressurized ladle based on the weight of the molten metal stored in the pressurized ladle. It becomes possible to supply a fixed amount of molten metal according to the weight stably and continuously.

In the ingot manufacturing method according to an aspect of the present invention, the step of calculating the weight of the molten metal stored in the pressurization-type ladle includes the step of placing the pressurization-type ladle on a load meter disposed near the point. It is placed and calculates the weight of the molten metal stored in the pressurization ladle based on the measurement result of the load meter, and pressurizes the inside of the pressurization ladle with the calculated pressure. The step of supplying the molten metal from the pressure ladle to the point is performed with the pressure ladle placed on the load meter.
In one form of this invention, it becomes possible to supply a fixed amount of molten metal stably and continuously, with a pressure ladle placed on a load meter.

In the ingot manufacturing method according to an aspect of the present invention, the flow rate of the molten metal supplied from the pressure ladle to the point is calculated based on the measurement result of the load meter, and the pressure ladle is applied to the point. You may correct | amend the pressure which pressurizes the inside of the said pressurization type ladle based on the said calculated flow volume so that the predetermined amount of molten metal may be supplied per unit time.
In one embodiment of the present invention, it is possible to stably and continuously supply a fixed amount of molten metal more accurately.

  In the ingot manufacturing method according to an embodiment of the present invention, the height of the molten metal surface of the flow path is detected, and the inside of the pressure ladle is pressurized based on the detected height of the molten metal surface. The pressure may be controlled.

  According to one embodiment of the present invention, it is possible to prevent an accident that the molten metal overflows from the flow channel when the flow of the molten metal becomes worse due to clogging or the like downstream of the flow channel, or when the molten metal stops flowing at all.

  According to the present invention, ingots having different weights can be manufactured without requiring large-scale equipment and without taking a great deal of time for setup.

It is a front view of the system which manufactures the ingot which concerns on one Embodiment of this invention. FIG. 2 is a top view of the system shown in FIG. 1. It is a front view which shows the basket, the drum for distribution, and a casting_mold | template in the system shown in FIG. FIG. 4 is a side view of FIG. 3. It is a top view of the casting_mold | template which concerns on one Embodiment of this invention. It is AA sectional drawing of FIG. It is a figure which shows the supply state of the molten aluminum to the casting_mold | template in the case of the ingot of a 1st weight. It is a figure which shows the supply state of the molten aluminum to the casting_mold | template in the case of the ingot of a 2nd weight. It is an example of the form of the ingot of the 1st weight. It is an example of the form of the ingot of a 2nd weight. It is a figure which shows the structure of the pressurization control system used for the system shown in FIG. It is a flowchart which shows operation | movement of the control apparatus shown in FIG. It is a flow for demonstrating the manufacturing method of the ingot which concerns on one Embodiment of this invention. It is a front view of the system which manufactures the ingot which concerns on other embodiment of this invention. It is a side view of the ladle shown in FIG. 14 of this invention. FIG. 16 is a top view of FIG. 15. FIG. 16 is a front view of FIG. 15. It is AA sectional drawing of FIG. It is another example of the form of an ingot of the 1st weight. It is another example of the form of the ingot of a 2nd weight.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a view showing a system for manufacturing an ingot according to an embodiment of the present invention, and FIG. 2 is a top view thereof.
As shown in FIG.1 and FIG.2, this system 1 has the continuous casting machine 10, the pressurization type ladle 20, the flow path 30, the load meter 40, and the control apparatus 70 (refer FIG. 5).

  The continuous casting machine 10 includes an endless conveyor 11, an ingot mold 12 connected to the conveyor 11, a distribution drum 13, and a drive unit that drives the conveyor 11 and the distribution drum 13 ( (Not shown).

  The pressure ladle 20 is portable and can be transported by, for example, a forklift, and stores molten aluminum as a molten metal therein. The pressure ladle 20 may be supplied with molten aluminum from a holding furnace (melting furnace) arranged in the factory, or supplied with molten aluminum from a holding furnace (melting furnace) arranged in another factory. It may be transported through a public road and brought into this factory. For example, air supplied from the factory is supplied to the inside of the pressurizing ladle 20 through the pressurizing port 21 to pressurize the inside, and the molten aluminum stored therein is connected to the pipe 22 through the pipe 22. Discharge from the tip. In the pressure ladle 20, the amount (flow rate) of molten aluminum discharged from the tip of the pipe 22 per unit time can be controlled by controlling the pressure of air supplied from the pressure port 21. The configuration of the pressure ladle 20 is disclosed in detail in, for example, Japanese Patent Application Laid-Open No. 2002-254158.

  The flow path 30 is for supplying the molten aluminum supplied from the pressure ladle 20 to the mold 12 via the distribution drum 13. The flow path 30 includes a first ridge 31 and a second ridge 35.

  The first rod 31 is molten aluminum discharged from the tip of the pipe 22 of the pressure ladle 20 at a first position (a point at which molten metal is supplied to the continuous casting machine) on the side away from the continuous casting machine 10. Is supplied, and the molten aluminum is circulated to the second position on the side close to the continuous casting machine 10. A discharge port 32 for discharging molten aluminum downward by gravity is provided on the lower surface of the first position of the first rod 31. A valve 33 is installed at the discharge port 32, and the flow rate of the molten aluminum discharged from the discharge port 32 can be adjusted by the opening degree of the valve 33.

This first trough 31 has a function of buffering molten aluminum, and when the pressure ladle 20 is replaced, it is possible to continue pouring as much water as is stored in the first trough 31. So that the production is not interrupted.
A predetermined level of the first trough 31 is provided with a molten metal level detection sensor 34 for detecting the height of the molten aluminum level flowing through.
The second rod 35 circulates the molten aluminum from the third position directly below the discharge port 32 of the first rod 31 to the fourth position in the distribution drum 13.
As shown in FIGS. 3 and 4, a plurality of discharge holes 36 are provided at the fourth position of the second flange 35 corresponding to the respective concave portions of the mold 12.

  The molten aluminum discharged from the discharge port 32 of the first rod 31 to the third position of the second rod 35 flows to the fourth position and is supplied to the mold 12 through each discharge hole 36. It has become.

  The distribution drum 13 is rotated in synchronization with the conveyor 11 on which the mold 12 is fixed by a drive unit (not shown), and is set so that the position of the mold 12 and the position of the slit 14 of the distribution drum 13 are matched. Has been.

  The distribution drum 13 is disposed on one side of the conveyor 11, and the mold 12 supplied with molten aluminum is transferred to the other side of the conveyor 11 downstream, and the mold is formed as an ingot in which molten aluminum is solidified on the other side. 12 is taken out. As described above, the ingot can be cast by continuously supplying molten aluminum to the mold 12 connected on the conveyor 11.

The load meter 40 is disposed near the first position of the first rod 31 and measures the weight of the pressure ladle 20 placed thereon. The measurement of the weight is performed from the start to the completion of supply, and feedback control described later is performed during that time.
5 is a top view of the mold 12, and FIG. 6 is a cross-sectional view taken along the line AA of FIG.

As shown in FIGS. 5 and 6, the mold 12 has a plurality of concave portions 12 a having a _first depth d ₁ on the surface thereof. More specifically, the mold 12 is provided with a total of 20 recesses 12a, for example, 10 in the X direction and 2 in the Y direction.
Further, the mold 12 has a second depth d ₂ shallower than the first depth d ₁ on the surface thereof, and a groove 12 b that communicates between the two recesses 12 a adjacent in the Y direction.

  Typically, when casting an ingot of about 1 kg, which is the first weight, using this mold 12, as shown in FIG. 7, the mold 12 has an amount that does not overflow from the recess 12a to the groove 12b. Ingot is cast by supplying molten aluminum.

Further, when casting an ingot of about 2.5 kg which is a second weight heavier than the ingot using the mold 12, as shown in FIG. 8, the mold 12 overflows from the recess 12a to the groove 12b. An amount of molten aluminum is supplied, and an ingot having a shape corresponding to a space in which two adjacent recesses 12a are connected by a groove 12b is cast.
Here, FIG. 9 shows an example of the form of an ingot having a first weight of about 1 kg, and FIG. 10 shows an example of the form of an ingot having a second weight of about 2.5 kg.

  The ingot 90 shown in FIG. 9 has cut faces (planes) 92 at two opposing positions on the side surface 91 of the truncated cone. This reduces the inconvenience due to rolling while increasing the surface area.

  The ingot 95 shown in FIG. 10 has a shape corresponding to a space in which two adjacent recesses 12a are connected by a groove 12b. That is, the ingot 95 has a shape in which two truncated cones 96 are connected by the connecting portion 97. As a result, the ingot 95 has a merit that the surface area is larger than that of a normal ingot and the melting speed when used in a melting furnace is increased. In addition, the tower-type melting furnace has the advantage of increasing the efficiency of heat exchange with the exhaust gas.

  In this continuous casting machine 10, by changing the amount of molten aluminum supplied to the mold 12, the mold 12 that can cast the ingot 90 having a weight of about 1 kg in the recess 12a is used as it is from the recess 12a to the groove 12b. It is possible to manufacture an ingot 95 having a weight of, for example, about 2.5 kg by casting an ingot 95 having a shape corresponding to a space in which an overflowing amount of molten aluminum is supplied and adjacent recesses 12a are connected by grooves 12b. It becomes.

Changing the amount of molten aluminum supplied to the mold 12 can be easily dealt with by reducing the speed of the conveyor 11 that sends the mold 12 of the continuous casting machine 10 or changing the flow rate of molten aluminum supplied to the mold 12. it can. Changing the flow rate of the molten aluminum supplied to the mold 12 can be handled by, for example, a pressure control system described later.
FIG. 11 is a diagram showing the configuration of a pressure control system used in this system.

  As shown in FIG. 11, in this system, a pressurizing air supply source 51 supplied from the factory side and an air supply port 52 are connected by a pipe 53. An air hose 54 is connected to the air supply port 52, and the air hose 54 is connected to the pressure port 21 of the pressure ladle 20. Air supplied from the factory side is supplied to the inside of the pressurization ladle 20 through the pipe 53 and the air hose 54, and the inside of the pressurization ladle 20 is pressurized.

  The piping 53 is provided with a pressurizing valve 56, an electropneumatic regulator 57, a high relief regulator 58, a relief valve 59, a leak valve (electromagnetic valve) 60, and a pressure sensor 61.

The control device 70 is arranged in a weight calculation data input unit 71 for inputting data for calculating the weight of the molten aluminum stored in the pressure ladle 20 from the load meter 40, and the first rod 31. A hot water surface height data input unit 72 for inputting data from the hot water surface detection sensor 34 and a touch panel (not shown) for inputting various settings and commands are provided. Further, the control device 70 inputs pressure data detected by the pressure sensor 61.
The control device 70 controls the electropneumatic regulator 57, the leak valve 60, and the like based on the input data.
Next, the pressure control by the control device 70 will be described based on the flowchart of FIG.
Prior to tapping, first, the following data is input on the touch panel of the control device 70, and the pressure ladle 20 is placed on the load meter 40.
Ladle tare weight W ₀ (eg 1500 kg)
The lower limit of the molten aluminum in the ladle weighing _{W al} (e.g. 100 kg)
Pressure Ps per unit weight of molten aluminum (for example, 15.0 kPa / ton)

When an instruction to start tapping is input from the touch panel (step 601), the control device 70 calculates the ladle lower limit weight based on the measurement data by the load meter 40 input from the weight calculation data input unit 71 (step 602). ). The ladle lower limit weight W _lo is calculated by the following equation, for example.
W _lo = W ₀ + W _a1

Next, the control device 70 calculates the pressurization pressure based on the measurement data from the load cell 40 input from the weight calculation data input unit 71, and pressurizes the pressurization ladle 20 with the pressurization pressure. The regulator 57 is controlled (step 603). Thus, the hot water is started, and thereafter, the pressurized pressure Px is appropriately controlled according to the weight of the pressurized ladle 20 measured by the load meter 40 until the hot water is completed. Typically, when the weight of the pressure ladle 20 is gradually reduced, the pressure Px gradually increases. That is, due to the characteristics of the pressure ladle 20, the height of the molten aluminum stored in the pressure ladle 20 and the pressure required for pouring are inversely proportional, and the molten aluminum is discharged to lower the molten metal level. It is necessary to increase the pressure for pressurizing the inside of the pressure ladle 20. This is because the lower the hot water level, the higher the head. Therefore, in the present system 1, a load meter 40 for measuring the weight of the pressure ladle 20 is disposed near the first position of the first rod 31 that is a point for supplying molten aluminum to the continuous casting machine 10. The weight of the pressurizing ladle 20 is continuously measured, the data is input to the control device 70, the pressure for pressurizing the inside of the ladle is calculated by calculation, and the pouring amount is controlled.
Specifically, the pressurizing pressure Px is calculated by the following equation, for example.
Px = −Ps · (Wx−W ₀ ) + b
here,
Wx: Ladle total weight (measurement data with load cell 40)
b: Section (for example, 36.0)

  Here, Ps can be corrected by an external volume (for example, correction width ± 3.0), and b can also be corrected by an external volume (for example, correction width ± 3.0). That is, the control device 70 calculates the flow rate of the molten aluminum supplied from the pressure ladle 20 based on the data input to the weight calculation data input unit 71, and a desired amount per unit time from the pressure ladle 20. The pressure to be controlled is corrected based on the calculated flow rate so as to supply molten aluminum. The pressure is performed by correcting Ps and b. That is, there are individual differences in the pressure ladle 20 to be used, and the amount of pouring will increase or decrease depending on the weight of the ladle tare or the amount of air leak from the pressure ladle 20 itself. Therefore, in the present system 1, the molten metal flow rate is calculated from the data of the load cell 40, and the pressure to pressurize to the set flow rate is corrected.

  When the hot water is being discharged, the control device 70 determines the height of the molten aluminum surface of the first trough 31 based on the data from the molten metal surface detection sensor 34 input from the molten metal surface height data input unit 72. When the upper limit is reached (step 604), the leak valve 60 is opened to release to the atmosphere (step 605), and the hot water is temporarily stopped.

  Thereafter, the control device 70, when the molten metal surface height of the molten metal in the first trough 31 reaches the lower limit value based on the data from the molten metal surface detection sensor 34 input from the molten metal surface height data input unit 72 ( Step 606), the leak valve 60 is closed (Step 607), and the hot water is restarted. Although the above steps 603 to 607 are repeated, in the present system 1, the pressurizing pressure Px is always calculated in step 603, and the pressurizing ladle 20 is pressurized based on the calculated value.

Then, when the weight of the pressure ladle 20 becomes the ladle lower limit weight W _lo based on the measurement data obtained by the load cell 40 input from the weight calculation data input unit 71 (step 608). The leak valve 60 is opened (step 609) to complete the hot water.
Next, a method for manufacturing an ingot in the system 1 configured as described above will be described with reference to FIG.

  First, a pressure ladle, typically using a forklift, is placed on a load cell 40 disposed near the first position of the first rod 31 which is a point for supplying molten aluminum to the continuous casting machine 10. 20 is conveyed (step 701).

  Next, under the control of the control device 70, air supplied from the factory side is supplied into the pressure ladle 20 through the pipe 53 and the air hose 54. Thus, the inside of the pressure ladle 20 is pressurized, and molten aluminum is supplied from the pressure ladle 20 to the first position of the first trough 31 (step 702). The pressurization control is as shown in the flowchart of FIG.

  At that time, the first weight or the second weight of the ingot is placed at the first position of the first rod 31 which is a point for supplying molten aluminum from the pressure ladle 20 to the continuous casting machine 10. The pressure for pressurizing the inside of the pressure ladle 20 is calculated based on the calculated weight of the molten aluminum so that the amount of molten aluminum per unit time is supplied. And the molten aluminum is supplied to the 1st position of the 1st basket 31 from the pressurization type ladle 20 by pressurizing the inside of the pressurization type ladle 20 with the calculated pressure.

  The molten aluminum supplied to the first position of the first rod 31 is continuously transferred to the connected mold 12 that is transported on the conveyor 11 via the first rod 31, the second rod 35, and the distribution drum 13. (Step 703), when casting an ingot of about 1 kg, which is the first weight, an amount of molten aluminum that does not overflow from the recess 12a to the groove 12b is supplied to the mold 12 so that the ingot Casted. On the other hand, when casting an ingot of about 2.5 kg, which is the second weight, molten aluminum in an amount overflowing from the recess 12a to the groove 12b is supplied to the mold 12, and the groove 12b is formed between two adjacent recesses 12a. An ingot having a shape corresponding to the space connected in step 1 is cast.

In the system 1 configured as described above, the pressure ladle 20 is transported and placed on a load cell 40 arranged near a point at which molten aluminum is supplied to the continuous casting machine 10, and this pressure ladle Since the molten aluminum is supplied directly from 20 to the continuous casting machine 10, the facility does not become large, and it is possible to easily cope with changes in layout and operation.
Next, another embodiment of the present invention will be described.
FIG. 14 is a diagram showing a configuration of a system for manufacturing an ingot according to this embodiment.

  As shown in FIG. 14, in this system 100, a pressure ladle 101 is used instead of the first trough 31 in the above embodiment. The pressure ladle 101 is placed on the load meter 40, the weight of the molten aluminum stored in the pressure ladle 101 is calculated, and the molten aluminum is supplied from the pressure ladle 101 to the continuous casting machine 10. The pressure for pressurizing the inside of the pressure ladle 101 is calculated based on the calculated weight of the molten aluminum so that a predetermined amount of molten aluminum per unit time is supplied to the second rod 35 that is a point to perform, By pressurizing the inside of the pressure ladle 101 with the calculated pressure, molten aluminum is supplied from the pressure ladle 101 to the second trough 35. In this case, the ladle 101 can perform pressurization control by the pressurization control system shown in FIGS. 11 and 12. On the other hand, the pressurizing ladle 20 that supplies molten aluminum to the ladle 101 may be controlled by the pressurization control system shown in FIGS. 11 and 12, but it is simpler than that. It may also be operated manually.

  Here, FIG. 15 to FIG. 18 are diagrams showing the configuration of this pressure ladle (hereinafter, this “pressure ladle” is referred to as “ladder” in this embodiment) 101. 16 is a top view, FIG. 17 is a front view, and FIG. 18 is a cross-sectional view taken along line AA of FIG.

  As shown in these drawings, the ladle 101 is an airtight ladle that can be transported by a forklift (not shown). The ladle body 110, the lid 120, the stalk 131 as the flow path 130, and the bowl Part 132 and hatch 150.

  The ladle 101 has two channel members 102 attached to the outer surface of the bottom portion substantially in parallel. The distance between the two channel members 102 matches the distance between the two forks of the forklift. The forklift inserts a forklift fork into each channel member 102 to convey the ladle 101 in the factory, and raises and lowers the ladle 101 from the truck bed. The ladle 101 has an outer periphery and a height of, for example, about 1.5 m, and stores molten aluminum, which is a molten metal, in the inside, and is transported by a general forklift in terms of size and weight. It is possible.

  The ladle 101 is not an integral part, but is composed of various parts. However, these parts have an airtight structure inside the ladle 101 by welding, fixing with packing, or the like. .

  The ladle body 110 has a bottom and a cylindrical shape, and stores molten aluminum therein. Moreover, the ladle main body 110 has the protrusion part 111 whose protrusion length becomes long toward an upper part from the lower part on the outer periphery. The protrusion 111 has a substantially trapezoidal shape when viewed from the upper surface, and the area gradually decreases from the upper part to the lower part. And this protrusion part 111 exists to the position of about 1/3 from the bottom of the height of the ladle main body 110, and the inclination angle is about 25 degrees from a perpendicular direction, for example.

  The ladle body 110 includes an outer peripheral iron skin 112, an inner heat insulating member 113, an inner fireproof member 114, and an insertion member 115 interposed between the heat insulating member 113 and the fireproof member 114. Have. The inner side of the ladle body 110 (the inner side of the refractory member 114) has an inner peripheral shape substantially similar to the outer peripheral shape of the ladle body 110, and has a space 111a at a position corresponding to the protruding portion 111. The molten aluminum is stored in the inner space.

  The lid 120 has a shape that closes the first opening 120 a including the protrusion 111 at the top of the ladle body 110. The lid 120 has an upwardly convex space, the outer periphery of which coincides with the outer periphery of the ladle body 110, and the outer periphery covers the internal space. Specifically, the flange 121 on the outer periphery of the lid 120 is overlapped on the flange 116 on the outer periphery of the ladle body 110 via a packing (not shown), and these flanges 116 and 121 are attached to the bolt 3 and the nut fixing tool 3. Multiple places are fixed by.

  The lid 120 is provided with a stalk hole 122 at a position corresponding to the protrusion 111, and is inclined downward by a predetermined angle, for example, about 25 ° from the horizontal direction as the portion 123 moves away from the outer periphery.

  The lid 120 has a second opening 120b substantially at the center. The second opening 120b is closed by the hatch 150 so as to be freely opened and closed. The molten aluminum is supplied to the ladle 101 through the second opening 120b. In addition, maintenance and simple repairs in the ladle 101 are also performed through the second opening 120b. Further, the gas burner is inserted during preheating through the second opening 120b. Note that the supply of molten aluminum to the ladle 101 can also be performed by depressurizing the inside of the ladle 101 via the flow path 130.

  The lid 120 has an outer peripheral iron skin 124, an inner heat insulating member 125, and an inner fireproof member 126. Unlike the ladle body 110, no insertion member is inserted between the heat insulating member 125 and the refractory member 126. The ladle body 110 needs to be replaced with a heat insulating member and a fireproof member, and in that case, an insertion member is necessary, but unlike the ladle body 110, the lid 120 is not a part for holding molten aluminum, This is because there are few opportunities for such replacement. Also, the lid 120 is not as deep as the ladle body 110 and is easy to replace.

  The flow path 130 is configured to circulate molten aluminum stored in the ladle 101 to the outside by pressurizing the inside from the outside of the ladle 101, and pressurizing the inside of the ladle 101. The molten aluminum is directly supplied to the second rod 35 through the flow path 130. The channel 130 includes a stalk 131 and a flange 132.

  The stalk 131 is made of, for example, ceramic and has a piping structure. The discharge port 131b exposed to the outside from the inclined portion 123 is formed near the bottom inside the ladle body 110 via the inlet 131a and the hole 122 provided in the lid 120. Have. The inner diameter of the stalk 131 is about 60 mm, for example, while the inflow port 131a is about one third of about 20 mm. Thereby, molten aluminum can be stably discharged outside through the stalk 131. That is, the discharge amount per unit time of the molten aluminum with respect to the internal pressurization of the ladle 101 can be brought close to a desired amount. In addition, the stalk 131 is disposed at a position (space 111a) corresponding to the protrusion 111 inside the ladle body 110 so as to be substantially parallel to the inclination of the protrusion 111 on the outside. Specifically, for example, the stalk 131 is disposed such that the upper portion thereof is inclined by approximately 25 ° from the vertical direction in the direction of the protruding portion 111.

  The flange 132 is for guiding the molten aluminum discharged from the discharge port 131b to a predetermined position. The collar portion 132 is inclined so as to be substantially parallel to the inclination of the inclined portion 123 of the lid 120. That is, the flange 132 is inclined by about 25 ° from the horizontal direction and forms an angle of about 90 ° with the stalk 131.

  The hatch 150 closes the second opening 120b provided in the lid 120 so as to be freely opened and closed. The hatch 150 is configured by disposing a fireproof member 150b inside the iron skin 150a. The hatch 150 is provided at a position slightly higher than the upper surface of the lid 120. One location on the outer periphery of the hatch 150 is attached to the lid 120 via a hinge 152. In addition, lever-type fixtures (not shown) are attached to four locations on the outer periphery of the hatch 150. As a result, the hatch 150 can be opened and closed with respect to the second opening 120b of the lid 120, the hatch 150 is fixed to the second opening 120b by a fixing tool, and the second opening 120b is hermetically closed. be able to.

With respect to the hinge 152 described above, for example, when the ladle 101 is viewed from the top and the direction in which the protruding portion 111 is provided is the front, the attachment position of the hinge 152 is behind the ladle 101. Thus, particularly when the hatch 150 is opened from the second opening 120b, the ladle 101 is usually light and easy to fall because the molten aluminum is not stored in the ladle 101. When it opens from 120b, balance is taken by the protrusion part 111 and the hatch 150, the ladle 101 becomes difficult to fall down, and safety can be improved.
The hatch 150 is provided with a pressurizing port 153, a stalk 154, a thermocouple 155, and a heater 156.

  The pressurization port 153 is a gas flow path for supplying gas for pressurizing the internal space of the ladle 101. For example, when the ladle 101 is conveyed, the pressurizing port 153 is closed by a cap in which a regulating member such as a metal scrubber that allows gas to pass but does not allow molten aluminum to pass therethrough. The stalk 154 is inserted into the ladle 101 through the hatch 150 and has a discharge port near the bottom of the ladle 101. The supply port at the upper part of the stalk 154 is open in a trumpet shape so that its diameter increases toward the upper part, and the height thereof is set higher than the discharge port 131b of the flange 132. The ladle 101 is pressurized to supply molten aluminum to the second tub 35, but at that time, even if the supply port at the top of the stalk 154 is not blocked, the ladle 101 is secondly discharged from the discharge port 31 b of the ridge 132. Molten aluminum can be supplied to the jar 35. The ladle 101 is supplied with molten aluminum from the pressure ladle 20 through the stalk 154. Also during the supply, the molten aluminum can be continuously supplied to the second flange 35 from the discharge port 131b of the flange 132. That is, molten aluminum can be replenished without stopping the production line.

  The thermocouple 155 is inserted into the ladle 101 through the hatch 150 and is used as a member for measuring the temperature of molten aluminum stored in the ladle 101. The tip of the thermocouple 155 extends to a position near the bottom inside the ladle 101.

The thermocouple 155 is located between the Stoke 154 and the inlet 131 a of the Stoke 131. Thereby, the temperature of the molten aluminum supplied to the exterior through the stalk 131 from the inside of the ladle 101 can be measured more correctly.
The heater 156 heats the molten aluminum inside by supplying electric power from the outside, for example. For example, a control device (not shown) supplies power to the heater 156 so that the molten aluminum inside becomes a predetermined temperature based on the temperature measurement result by the thermocouple 155. Thereby, it becomes possible to control the temperature of the molten aluminum supplied to the continuous casting machine 10 from the ladle 101 very precisely.
The present invention is not limited to the above-described embodiment, and can be implemented with various modifications. The scope of the implementation also belongs to the technical scope of the present invention.

  For example, in the above-described embodiment, the main shape of the ingot is a truncated cone. However, the present invention is not limited to this, and an ingot of another form may be used. For example, the configuration shown in FIGS. 19 and 20 may be used. Here, FIG. 19 illustrates an ingot having a first weight, and FIG. 20 illustrates an ingot having a second weight. Furthermore, the weight of the ingot shown in this embodiment is merely an example. In the above embodiment, the minimum unit of the ingot weight is 1 kg and the combined ingot weight is 2.5 kg. However, the minimum unit of the ingot weight is about 200 g, and the combined ingot weight is about 200 g. May be about 500 g.

Moreover, in the said embodiment, although only one continuous casting machine was disclosed, this invention presupposes the system which has a several continuous casting machine actually. However, the present invention can be applied to a system having one continuous casting machine.
In the above embodiment, molten aluminum is used as an example of the molten metal, but other metals may be used as a matter of course.
Furthermore, the configuration of the pressurization system can be modified in various ways, and the control device can adopt a configuration using a sequencer, a configuration using a computer, or the like.

DESCRIPTION OF SYMBOLS 1 System which manufactures ingot 10 Continuous casting machine 11 Conveyor 12 Mold 12a for ingot Recess 12b Groove part 13 Distribution drum 20 Pressurization ladle 30 Flow path 31 1st bar 34 Hot water level detection sensor 35 2nd bar 40 Load Total 70 Control device 71 Weight calculation data input unit 72 Hot water surface height data input unit

Claims (4)

A mold having a plurality of concave portions having a first depth and a second depth shallower than the first depth and having a groove portion communicating between at least two adjacent concave portions in a continuous casting machine. Place and
When casting an ingot having a first weight, an ingot is cast by supplying an amount of molten metal that does not overflow into the groove from the recess to a mold disposed in the continuous casting machine, and the first weight is cast. When casting an ingot having a second weight heavier than the above, an amount of molten metal overflowing from the concave portion to the groove portion is supplied to a mold disposed in the continuous casting machine, and the groove portion is adjacent to the concave portion. A method for producing an ingot, in which an ingot having a shape corresponding to the space connected by the is cast. It is a manufacturing method of the ingot of Claim 1, Comprising:
The mold is connected to the continuous casting machine,
Near the point where the molten metal is supplied to the continuous casting machine, it has portability and conveys a pressure ladle that stores the molten metal,
Calculate the weight of the molten metal stored in the pressure ladle,
The calculation is performed so as to supply a molten metal in an amount per unit time corresponding to the first weight or the second weight to a point at which the molten metal is supplied from the pressure ladle to the continuous casting machine. Calculate the pressure to pressurize the inside of the pressure ladle based on the weight of the molten metal,
By pressurizing the inside of the pressure ladle at the calculated pressure, the molten metal is supplied from the pressure ladle to the point,
An ingot manufacturing method for continuously supplying molten metal from the point to the connected mold via a flow path. An ingot produced by the method for producing an ingot according to claim 1 or 2,
The ingot which has a shape according to the space which connected between the said recessed parts with the said groove part. A mold used in the method for producing an ingot according to claim 1 or 2,
A mold having a plurality of recesses having a first depth and a second depth shallower than the first depth, and provided with a groove portion communicating between at least two adjacent recesses.