System for melting, heating, and supplying metal, and molten metal-pouring device

Abstract

To provide a system for melting, heating, and supplying a high-quality molten metal in terms of quantity, temperature, and cleanliness to an external processing machine.SOLUTION: A system for melting, heating, and supplying a molten metal includes a melting device 100, a heating device 200, a molten metal-pouring device 300, and a control device 500. The melting device 100 heats a solid metal material 101 to change the same into a molten metal 214 in a liquid state. The heating device 200 includes a heat-resistant vessel 211 that accommodates the molten metal 214 produced by the melting device 100, and a heating part 212 that heats the molten metal 214 accommodated in the heat-resistant vessel 211. The molten metal-pouring device 300 supplies the molten metal 214 heated by the heating device 200 to an external processing machine 400 while maintaining its temperature. The control device 500 controls the amount of the solid metal material 101 that is changed by the melting device 100 into the molten metal 214 and supplied to the heat-resistant vessel, based on the amount of the molten metal 214 supplied from the molten metal-pouring device 300 to the external processing machine 400.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to a metal melting temperature-raising supply system and a water heating device.

Background Art

[0002] Patent Document 1 describes a melting facility using an induction heating type aluminum melting furnace. This melting facility supplies aluminum melting raw materials in a solid state such as plate materials or crushed materials to a crucible, and the crucible moves to each station (hereinafter referred to as "ST") on a turntable by step feeding. Between the time when the crucible reaches the water supply ST from the raw material input ST, the crucible is induction heated by an induction heating coil installed on the outer periphery of the crucible, and the aluminum melting raw material is heated and melted by the heat generated by the crucible. Then, when the crucible reaches the water supply ST, this melting facility tilts the crucible to supply (i.e., supply water) the molten metal to an external processing machine. Note that the molten metal may be called molten metal or hot water.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, the melting facility described in Patent Document 1 has the following problems regarding the amount, temperature, and cleanliness of the molten metal supplied to the external processing machine.

[0005] First, regarding the amount of molten metal, this melting facility supplies aluminum melting raw materials to the crucible in a solid state such as sheet materials or crushed materials. The accuracy of the amount of molten metal in the crucible depends on the form of the materials being input. Therefore, in this melting facility, variations occur in the amount of molten metal in the crucible in terms of the weight per unit of each sheet material or crushed material being input. Thus, when this melting facility tilts the crucible to supply molten metal to an external processing machine, there is a problem that variations occur in the amount of molten metal supplied to the external processing machine.

[0006] Next, regarding the temperature of the molten metal, since this melting facility melts and raises the temperature of the metal in a solid-liquid coexistence state inside the crucible, the temperature of the molten metal during the heating-up process varies due to the balance of solid-liquid coexistence that changes according to the shape of the materials input into the crucible and the posture at the time of input. Therefore, in this melting facility, in order to set the molten metal to the target temperature, temperature control is carried out by controlling the induction heating output near the completion of melting. However, because the crucible operates in a step-feed manner, a mechanism for individually controlling the output of all the induction heating coils at each station is required, leading to an increase in equipment costs. In addition, for temperature control immediately before water supply, when the water supply cycle is short, the time available for temperature control also becomes short, so the area where variations can be developed is limited. Even if the temperature can be controlled, since it tilts and supplies water, there is a problem that the time for the molten metal to come into contact with the atmosphere becomes long, and the temperature of the molten metal during water supply also becomes unstable.

[0007] Subsequently, regarding the cleanliness of the molten metal, this melting facility performs a gas extraction process for extracting the gas components dissolved in the molten metal in the gas extraction ST provided between the raw material input ST and the water supply ST. However, in this molten metal facility, since the amount, temperature, and solid-liquid coexistence balance of the molten metal in the crucible change each time, there is a problem that the degassing effect by the gas extraction process is not constant.

[0008] Thus, if there are variations in the quality of the molten metal such as the amount, temperature, and cleanliness of the molten metal supplied to an external processing machine, variations in the quality of cast products processed by a die-casting machine as an example of an external processing machine (for example, dimensional accuracy, fluctuations in internal quality, presence or absence of burr formation, etc.) will occur. Therefore, considering the defective rate, the production plan and the increase in finishing countermeasures in the subsequent process result in a process design with a lot of waste.

[0009] In view of the above points, an object of the present disclosure is to provide a metal melting and temperature-raising supply system and a water supply device that can supply high-quality molten metal in terms of amount, temperature, and cleanliness to an external processing machine.

Means for Solving the Problems

[0010] According to one aspect of the present disclosure, a metal melting and temperature-raising supply system that melts and raises the temperature of a solid-state metal material (101) and supplies it to an external processing machine (400) includes a melting device (100) that heats the metal material to change it into a molten metal (214) in a liquid state, a temperature-raising device (200) having a heat-resistant container (211) that stores the molten metal produced by the melting device and a temperature-raising heating unit (212) that heats the molten metal stored in the heat-resistant container, a water supply device (300) that supplies the molten metal heated by the temperature-raising device to the external processing machine while maintaining the temperature of the molten metal, and a control device (500) that controls the amount of the molten metal supplied by the melting device to change the solid-state metal material into the molten metal and supply it to the heat-resistant container according to the amount of the molten metal supplied from the water supply device to the external processing machine.

[0011] According to this, a metal melting and temperature-raising supply system (hereinafter referred to as "this system") changes a solid-state metal material into a molten metal in a liquid state by a melting device and supplies it to a heat-resistant container, so it is possible to supply a fixed amount and a fixed temperature of molten metal from the melting device to the heat-resistant container. Therefore, since the temperature-raising heating unit can raise the temperature of the molten metal in the heat-resistant container with a certain heating energy, compared with individually outputting and controlling the heating energy of the temperature-raising heating units provided in each of the plurality of heat-resistant containers, the equipment cost can be reduced. In addition, since the amount and temperature of the molten metal in the heat-resistant container are constant, it is possible to keep the cleanliness of the molten metal constant by sharing the purification treatment process. Therefore, this system can supply high-quality molten metal with a certain amount, a certain temperature, and a certain cleanliness to an external processing machine from the heat-resistant container via a hot water supply device. As a result, variations in quality such as dimensional accuracy, variations in internal quality, and burr generation in the casting products processed by the external processing machine can be reduced, and a lean process design can be realized regarding production planning considering the defective rate and finishing in subsequent processes.

[0012] Furthermore, this system does not need to constantly keep a large amount of molten metal warm, but makes the required amount of molten metal in the melting device when needed, raises the temperature in the heat-resistant container, and supplies it to the external processing machine. Therefore, it can contribute to carbon neutrality and further contribute to the safety of the production site.

[0013] In addition, in this disclosure, a fixed amount means an amount within a predetermined range with little variation, a fixed temperature means a temperature within a predetermined range with little variation, a certain cleanliness means a cleanliness within a predetermined range with little variation, and a certain heating energy means a heating energy within a predetermined range with little variation.

[0014] According to another aspect of this disclosure, a hot water supply device (300) that supplies molten metal (214) obtained by melting a metal material (101) to an external processing machine (400) includes a hot water supply container (311) that takes out molten metal from a heat-resistant container (211) containing the molten metal and holds it in a sealed space, and A weight measurement unit (319) that measures the weight of the hot water supply container in the three-axis directions of the orthogonal coordinate system set for the hot water supply container, A control device (500) that calculates the amount of molten metal taken out from the heat-resistant container to the hot water supply container based on the difference between the weight of the hot water supply container measured by the weight measurement unit before taking out the molten metal from the heat-resistant container to the hot water supply container and the weight of the hot water supply container measured by the weight measurement unit after taking out the molten metal from the heat-resistant container to the hot water supply container.

[0015] According to this, since the control device calculates the amount of molten metal taken out from the heat-resistant container to the hot water supply container based on the weight difference of the hot water supply container, even when metal residues remain fixed or the like on the bottom of the hot water supply container, it is possible to take out the target amount of molten metal from the heat-resistant container to the hot water supply container. Therefore, the hot water supply device can supply the target amount of molten metal from the hot water supply container to the external processing machine. Furthermore, since the hot water supply device uses a weight measurement unit that measures the weight of the hot water supply container in the three-axis directions, even when the hot water supply device is tilted with respect to the vertical direction, it is possible to take out the target amount of molten metal from the heat-resistant container to the hot water supply container. Therefore, the hot water supply device can supply the target amount of molten metal from the hot water supply container to the external processing machine.

[0016] Note that the reference numerals in parentheses attached to each component etc. show an example of the correspondence relationship between the component etc. and the specific components etc. described in the embodiments described later.

Brief Description of the Drawings

[0017]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Mode for Carrying Out the Invention

[0018] Hereinafter, a metal melting heating and supply system (hereinafter referred to as "this system") according to an embodiment of the present disclosure will be described with reference to the drawings.

[0019] As shown in FIGS. 1 and 2, this system melts and heats a solid-state metal material 101 (for example, aluminum or an aluminum alloy, etc.) and supplies the molten metal 214, which has been temperature-adjusted and metered, to an external processing machine 400 such as a die-casting machine.

[0020] This system includes a melting device 100, a temperature-raising device 200, a hot water supply device 300, a control device 500, etc. The melting device 100 is a device that uses induction heating to heat a solid metal material 101 and convert it into a molten metal 214 in a liquid state. The temperature-raising device 200 is a device that receives the molten metal 214 supplied from the melting device 100 in a crucible 211 and sequentially heats it to the target temperature. Note that the crucible 211 is an example of a heat-resistant container. The hot water supply device 300 is a device that takes out the molten metal 214 heated by the temperature-raising device 200 from the crucible 211, keeps it warm and measures it in a sealed space, and supplies it to an external processing machine 400. The control device 500 is a control panel composed of a microcomputer equipped with a processor such as a CPU and memories such as a ROM, a RAM, and a flash memory, and its peripheral circuits. The control device 500 executes a program stored in the memory by the processor and controls the driving of each part of the melting device 100, the temperature-raising device 200, and the hot water supply device 300.

[0021] As shown in FIG. 3, the melting device 100 has an induction heating coil 102 as an induction heating part, a heat-resistant insulating part 103 that supports the induction heating coil 102, a material receiving part 107 provided below the induction heating coil 102, etc. The induction heating coil 102 is composed of, for example, a coil wire wound in a concentric circle shape, and it is possible to heat the metal material 101 placed inside its inner peripheral side by electromagnetic induction. The material receiving part 107 has a molten metal passing hole 104 through which the molten metal 214 made by the induction heating coil 102 passes. As shown by the arrow M3 in FIG. 7, the melting device 100 can convert the solid metal material 101 into the molten metal 214 and directly supply it from the molten metal passing hole 104 to the crucible 211.

[0022] Further, as a modification of an embodiment, as shown in FIG. 4, the melting device 100 may include a material detection unit 105 that detects the presence or absence of the metal material 101, and a molten metal level detection unit 106 that detects the level of the molten metal 214 accommodated in the crucible 211. The molten metal level detection unit 106 is an example of a molten metal amount detection unit that detects the amount of the molten metal 214 accommodated in the crucible 211. The molten metal level detection unit 106 is composed of, for example, a laser sensor or a camera. Further, the material receiving unit 107 may be composed of a wire mesh or the like.

[0023] A metal material 101 such as a metal ingot that is a raw material of the molten metal 214 is introduced into the inner peripheral side of the induction heating coil 102 so that its posture is determined. The introduction of the metal material 101 may be performed manually, or as shown in FIG. 4, the material detection unit 105 may be provided to automatically introduce it in response to the decrease of the metal material 101. When AC power is supplied from a high-frequency AC power source to the induction heating coil 102, the metal material 101 generates Joule heat, and when the metal material 101 exceeds its melting point, a phase change from solid to liquid occurs, and it falls through the molten metal through-hole 104 into the crucible 211. It is safer and more desirable to cover the induction heating coil 102 with a heat-resistant insulating portion 103 that covers the entire coil. The induction heating coil 102 does not necessarily have to be configured concentrically, and the heating efficiency can be improved by optimally designing according to the shape of the material to be used.

[0024] When starting continuous operation of the entire system, it takes time for the metal material 101 to start melting from room temperature. Therefore, correlation data between the induction heating output and the temperature of the metal material 101 is obtained in advance for each metal material 101 to be used, and the system has a preheating function to raise and maintain the temperature of the metal material 101 until just before it melts when the system is started up. The correlation between the melting amount and the induction heating output during melting is also obtained, and by switching between the melting output set according to the required melting amount and cycle time and the preheating output during preheating, a certain amount of molten metal 214 is supplied to the lower crucible 211 at the target cycle time. Regarding the switching of the output, first, preheating is performed during operation preparation, and after the preheating is completed, a signal indicating the completion of operation preparation is sent to the control device 500 of the entire system. In response to the interlocking start signal from the overall control, the output is switched from the preheating output to the melting output to start melting. It may be automatically switched to the preheating output by time based on the correlation between the melting amount and the induction heating output described above, or as shown in FIG. 4, a liquid level detection unit 106 may be provided in the melting device 100 to sense the liquid level height of the molten metal 214 in the crucible 211, and the induction heating output may be switched accordingly. After the second cycle of the crucible 211, the amount of molten metal 214 actually supplied from the crucible 211 to the external processing machine 400 by the water supply device 300 described later is fed back, and after melting the same amount again, the induction heating output may be switched.

[0025] As shown in FIG. 5, the temperature raising device 200 has a plurality of stations (hereinafter referred to as "ST"). Specifically, the temperature raising device 200 includes a melting ST that receives the molten metal 214 supplied from the melting device 100, a purification ST that supplies an inert gas to the molten metal 214, a foreign matter removal ST that removes the foreign matter 231 floating on the surface of the molten metal by purification, and a hot water supply ST that supplies the molten metal 214 to the outside. The temperature raising pots 210 are fixedly installed at equal intervals on the circumference of the swivel base 220, and the swivel base 220 is step-fed at a predetermined time interval by a rotation driving device (not shown) by 1 / number of STs per rotation (360°). The arrow M2 in FIG. 5 indicates the step-feed direction of the swivel base 220. Although FIG. 5 shows an example of 4 STs, variations can also be accommodated by optimally designing the number of STs according to the required melting amount and cycle time.

[0026] As shown in FIG. 6, each of the plurality of temperature raising pots 210 has a crucible 211 that receives the molten metal 214, a temperature raising heating unit 212 that heats the crucible 211 from the outside, and a heat insulating wall 213 for the temperature raising pot that suppresses heat dissipation from the temperature raising heating unit 212 to the outside. The crucible 211 is a heat-resistant container that houses the molten metal 214 produced by the melting device 100. The temperature raising heating unit 212 is, for example, a radiation heater, and heats and raises the temperature of the molten metal 214 housed in the crucible 211. The plurality of temperature raising heating units 212 are respectively provided in the plurality of crucibles 211. Since the crucible 211 is assumed to deteriorate over time by contacting the high-temperature molten metal 214, the outer diameter of the crucible 211 is set to be equal to or less than the inner diameter of the positioning portion 215 of the temperature raising heating unit 212, so that the crucible 211 can be easily replaced.

[0027] As shown in FIG. 8, the cleaning ST as the cleaning unit is provided with a gas pipe 221 for sending an inert gas 222 into the molten metal 214 for cleaning the molten metal 214. As shown in FIG. 9, the foreign matter removal ST is provided with a scraper 232 for wiping and removing the foreign matter 231 floating near the surface of the molten metal in the cleaning ST. As shown in FIG. 10, the hot water supply ST is provided with a hot water supply ST molten metal surface detection unit 241 for detecting the height of the surface of the molten metal 214 accommodated in the crucible 211, and a molten metal temperature confirmation unit 242 for confirming the temperature of the molten metal 214 in a contact or non-contact manner. The hot water supply ST molten metal surface detection unit 241 and the molten metal temperature confirmation unit 242 can move to positions facing the molten metal 214 accommodated in the crucible 211 and positions away from the crucible 211, as shown by the arrow M6. Further, as shown by the arrow M7, the hot water supply device 300 can move to a position away from the crucible 211 and a position closer to the crucible 211.

[0028] As shown in FIG. 11, the hot water supply device 300 includes a hot water pot 311 as a hot water container, a suction pipe 318, a shut-off pin 312, a vacuum suction & inert gas supply port 313, seal portions 314 and 324, a hot water temperature detection portion 315, a hot water heating portion 316, a heat insulating wall 317, a weight measurement portion 319, and a housing 320. The hot water pot 311 is a container that takes out the molten metal 214 from the crucible 211 and holds it in a sealed space. The bottom inner wall 321 of the hot water pot 311 has a tapered shape at an angle exceeding 0° with respect to a virtual plane perpendicular to the axis CL of the hot water pot 311. The suction pipe 318 is a pipe that extends downward from the bottom of the hot water pot 311. The shut-off pin 312 is a member that opens and closes the hot water outlet 322 provided at the bottom of the hot water pot 311. The vacuum suction & inert gas supply port 313 is an opening for performing vacuum suction when sucking the molten metal 214 from the crucible 211 into the hot water pot 311 and supplying an inert gas when supplying the molten metal 214 from the hot water pot 311 to the external processing machine 400. The seal portions 314 and 324 are elastic members that prevent the entry and exit of gas from the structure attachment portion into the hot water pot 311. The hot water temperature detection portion 315 is a temperature sensor that detects the temperature of the molten metal 214 (i.e., the hot water temperature) sucked and held in the hot water pot 311. The hot water heating portion 316 is a heater device that heats the molten metal 214 held in the hot water pot 311. The heat insulating wall 317 is made of a material having a lower thermal conductivity than the hot water pot 311, is provided outside the hot water pot 311, and suppresses the heat dissipation of the molten metal 214 held in the hot water pot 311. The weight measurement portion 319 is a sensor that measures the weight of the entire hot water supply device 300. The housing 320 is a member that packages each part of the hot water supply device 300.

[0029] The weight measurement unit 319 can measure the weight of the entire hot water supply device 300 including the hot water supply pot 311 in the three axial directions of the orthogonal coordinate system set for the hot water supply pot 311. Note that the three axial directions of the orthogonal coordinate system set for the hot water supply pot 311 are the directions in which the X-axis, Y-axis, and Z-axis extend in the orthogonal coordinate system with the axis CL of the hot water supply pot 311 as the Z-axis and the two axes perpendicular to the Z-axis on the plane perpendicular to the Z-axis as the X-axis and Y-axis. The weight measurement unit 319 is composed of, for example, a plurality of load sensors that measure the load in the X-axis direction, the load in the Y-axis direction, and the load in the Z-axis direction respectively.

[0030] In response to a hot water supply instruction, as shown in FIG. 12, the hot water supply device 300 immerses the tip of the suction pipe 318 in the molten metal 214 to a predetermined immersion depth D at the water surface measured by the water surface detection unit 241 of the hot water supply ST. After immersion, the inside of the hot water supply pot 311 is evacuated by driving a vacuum suction mechanism (not shown) connected to the vacuum suction & inert gas supply port 313, and the molten metal 214 in the crucible 211 is sucked into the hot water supply pot 311. The control device 500 controls the suction amount according to the negative pressure profile acquired in advance for the purpose of preventing overshoot of suction before sucking the molten metal 214 to a specified amount. As shown in FIG. 13, when the molten metal 214 sucked into the hot water supply pot 311 reaches the specified suction amount, the cutoff pin 312 is lowered so as to contact the upper end of the suction pipe 318 (i.e., the inner edge of the hot water outlet 322), and the hot water outlet 322 is closed and held. While managing the hot water temperature of the molten metal 214 at the stage when the sucked molten metal 214 touches the hot water temperature detection unit 315, heat insulation is performed so that the temperature can be maintained at the target temperature by the hot water supply heating unit 316. As shown by the arrow M1 in FIGS. 1 and 2, the hot water supply device 300 is moved to the hot water supply position 401 of the external processing machine 400 while holding and heat-insulating the molten metal 214. Then, the cutoff pin 312 is raised to open the hot water outlet 322, and an inert gas is supplied from the vacuum suction & inert gas supply port 313 into the hot water supply pot 311, thereby supplying the molten metal 214 to the external processing machine 400.

[0031] As shown in FIGS. 12 and 13, although the immersion depth D of the suction pipe 318 when vacuum-sucking the molten metal 214 in the aforementioned crucible 211 into the water supply pot 311 is not limited, a depth of about 5 mm to 20 mm from the water surface is desirable. This can prevent the oxides on the water surface from being sucked and reduce the amount of molten metal 214 adhering to the outside of the suction pipe 318. Note that the immersion depth D of the suction pipe 318 is not limited thereto. For example, the suction pipe 318 may be immersed in the molten metal 214 in the crucible 211 to a depth at which the target amount of molten metal 214 to be taken out from the crucible 211 to the water supply pot 311 can be sucked.

[0032] As shown in FIGS. 10 and 14, when the control device 500 vacuum-sucks the molten metal 214 in the crucible 211 into the water supply pot 311, the weight measuring unit 319 measures the weight before the suction pipe 318 is immersed in the molten metal 214 at the start of suction and at the position where the suction pipe 318 has completely risen from the inside of the crucible 211 after the suction is completed, and the difference is taken as the actual suction amount. That is, the control device 500 calculates the amount of molten metal 214 taken out from the crucible 211 to the water supply pot 311 based on the difference between the weight measured by the weight measuring unit 319 before taking out the molten metal 214 from the crucible 211 to the water supply pot 311 and the weight measured by the weight measuring unit 319 after taking out the molten metal 214 from the crucible 211 to the water supply pot 311.

[0033] Also, as shown in FIGS. 12 and 13, when the control device 500 vacuum-sucks the molten metal 214 in the crucible 211 into the water supply pot 311, even when the suction pipe 318 is immersed in the molten metal 214 and the molten metal 214 in the crucible 211 is vacuum-sucked into the water supply pot 311, the weight measurement unit 319 continuously measures the weight. Then, based on the measured value of the weight measurement unit 319, when the amount of the molten metal 214 sucked into the water supply pot 311 reaches the target specified suction amount, the shut-off pin 312 is lowered so as to contact the upper end of the suction pipe 318 (i.e., the inner edge of the spout 322), and the spout 322 is closed. At this time, the target value of the suction amount is calculated in consideration of the buoyancy applied to the water supply device 300 at the completion of immersion and the amount of the molten metal 214 that returns from the suction pipe 318 to the crucible 211 when the water supply device 300 rises from the crucible 211. Therefore, although the shape of the suction pipe 318 is not limited, it is preferable to ensure the suction accuracy by making the internal volume as small as possible, for example, by shortening the total length in the vertical direction. By determining the suction amount from the weights before and after suction in consideration of such disturbances in this way, the suction amount remains constant even when metal residues are generated inside the water supply pot 311 over time.

[0034] By the way, generally, there is a concern that the accuracy of the method of measuring the amount of the molten metal 214 by weight deteriorates due to the inclination of the water supply device 300. In contrast, in addition to the above Z-axis direction, this water supply device 300 calculates the total weight based on the weights measured for three axes including two axes of the X-axis and the Y-axis, so that high accuracy (for example, variation range: ±1% or less) can be maintained even if the water supply device 300 does not maintain an upright posture with respect to the vertical direction.

[0035] Next, the overall operation of this system will be described. As for the operation of this system, with the start of continuous startup of the entire system, as shown in FIG. 7, a certain amount of molten metal 214 is supplied from the melting device 100 to the crucible 211 at the melting ST. In the temperature raising device 200, the output of the temperature raising heating unit 212 is set to an output such that when supplying hot water to the molten metal 214 at the hot water supply ST, it reaches the target temperature of the molten metal 214, considering the amount and cycle time of the molten metal 214. The crucible 211 is heated with a constant output at all times, and the molten metal 214 is heated by heat transfer from the crucible 211. That is, the molten metal 214 supplied from the melting device 100 is received by the crucible 211 and at the same time the temperature raising is started, and heating continues until hot water is supplied from the crucible 211 at the hot water supply ST, except during abnormal times such as chocolate stop. Since a certain amount of heating energy is applied to a certain amount of molten metal 214, the temperature of the obtained molten metal 214 also becomes constant (for example, fluctuation range: ±1°C or less). When it switches to the afterheat output after melting the specified amount in the melting device 100, a melting completion signal is sent to the control device 500 at the same time. In response to this, a one-step feed signal is transmitted to the swivel base 220, and the temperature raising pot 210 at the melting ST is sent to the cleaning ST.

[0036] As shown in Fig. 8, the purification ST is equipped with a gas pipe 221 for sending an inert gas 222 into the molten metal 214 for purifying the molten metal 214. With the step feed completion signal of the temperature-raising pot 210, a supply valve (not shown) of the inert gas supply device 223 is opened to start the supply of the inert gas 222, and at the same time, as shown by the arrow M4 by an up-and-down mechanism (not shown), the gas pipe 221 is immersed in the molten metal 214. The position where the gas pipe 221 is immersed is not uniquely determined and can be optimally set according to the material type and the shape of the crucible 211. Generally, a position near the bottom surface of the crucible 211 and not in contact with the crucible 211 is desirable. Note that the position where the gas pipe 221 is immersed can be set at an arbitrary position between the center in the depth direction of the molten metal 214 in the crucible 211 and the inner wall of the bottom of the crucible 211. According to the required cleanliness of the molten metal 214 and the cycle time, the shape of the gas supply hole of the gas pipe 221, the supply flow rate of the inert gas 222, and the supply time are determined in advance, and the purification is carried out according to the conditions. With the purification completion signal, the gas pipe 221 is raised to the original position by the same up-and-down mechanism, and with the completion signal of the raising, the same supply valve is closed. With the melting completion signal in the melting ST and the gas supply valve closing signal, the temperature-raising pot 210 in the purification ST is sent to the foreign matter removal ST.

[0037] As shown in Fig. 9, the foreign matter removal ST is equipped with a scraper 232 for wiping and removing the foreign matter 231 floating near the surface of the molten metal during purification. With the step feed completion signal of the temperature-raising pot 210, by a conveying mechanism (not shown), as shown by the arrow M5, the scraper 232 is immersed from the surface of the molten metal to a preset depth, and the foreign matter 231 near the surface of the molten metal is entangled and separated from the molten metal 214 by the operation of taking it up. Note that the separation and removal method is not limited to the illustrated method, and for example, a method of sucking the foreign matter 231 can be considered. The foreign matter 231 attached to the scraper 232 is physically removed in a foreign matter recovery box (not shown) by utilizing a jig or air, etc. With the melting completion signal in the melting ST, the gas supply valve closing signal in the purification ST, and the foreign matter recovery box return signal of the scraper 232 in the foreign matter removal ST, the temperature-raising pot 210 in the foreign matter removal ST is sent to the hot water supply ST.

[0038] As shown in FIG. 10, the hot water supply ST is provided with a hot water supply ST liquid level detection unit 241 that detects the liquid level of the molten metal 214 in the crucible 211 sent to the hot water supply ST, and a hot water temperature confirmation unit 242 that checks whether there is any heating failure such as heater disconnection during the temperature rise from the melting ST to the hot water supply ST. The control device 500 uses the step feed completion signal of the temperature rise pot 210 to cause the hot water supply ST liquid level detection unit 241 and the hot water temperature confirmation unit 242 to access above the liquid level, and perform measurement of the liquid level height and confirmation of the presence or absence of heating failure with the preset temperature of the molten metal 214 as the determination value.

[0039] As shown in FIG. 12, the control device 500 immerses the suction pipe 318 provided in the hot water supply device 300 into the molten metal 214 to a predetermined position with respect to the liquid level height measured by the hot water supply ST liquid level detection unit 241 upon completion of the liquid level height measurement and hot water temperature confirmation. The hot water supply device 300 sucks and holds while heat-insulating and measuring the molten metal 214 within the sealed space of the hot water supply pot 311. Then, as shown in FIG. 13, when the molten metal 214 sucked into the hot water supply pot 311 by the hot water supply device 300 reaches the target specified suction amount, the cutoff pin 312 is lowered so as to contact the inner edge of the spout 322, and the spout 322 is closed and held. Subsequently, as shown by the arrow M8 in FIG. 14, the hot water supply device 300 is raised from the crucible 211. Thereafter, as shown by the arrow M1 in FIGS. 1 and 2, the hot water supply device 300 is moved to the hot water supply position, and a certain amount of molten metal 214 is supplied to the external processing machine 400 while maintaining a constant temperature.

[0040] By the way, conventionally, in the process of handling molten metal 214 such as die casting, since the melting and holding furnace needs to constantly hold (keep warm) a large amount of melted metal using a gas burner or the like, continuous operation has been the norm. As a result, not only is the energy consumption more than necessary, but also dangerous work where operators may come into contact with high-temperature objects is required for its maintenance and preservation. In contrast, in this system, by sequentially supplying the necessary amount of molten metal 214 to the external processing machine 400 when needed, the molten metal 214 can be used up without holding it, thus contributing to carbon neutrality and improving the safety of the production site. In addition, this system can supply the processing equipment with molten metal 214 that always has a certain targeted quality (i.e., a certain quantity, a certain temperature, and a certain degree of cleanliness) for each operating cycle of the system. For example, in aluminum die casting, if the quality of the above-mentioned molten metal 214 varies, it will lead to variations in the quality of the cast products (i.e., dimensional accuracy, internal quality fluctuations, presence or absence of burr formation, etc.). Therefore, conventionally, production plans considering the defect rate and finishing in subsequent processes have been used to address this. In contrast, this system can achieve a lean process design by improving the robustness of the quality of the cast products.

[0041] Compared with the above prior art and the technology described in the above Patent Document 1, the system according to one embodiment has the following operational effects.

[0042] (1) This system includes a melting device 100, a heating-up device 200, a hot water supply device 300, and a control device 500. The melting device 100 heats the solid metal material 101 to turn it into molten metal 214. The heating-up device 200 has a crucible 211 that houses the molten metal 214 produced by the melting device 100, and a heating-up heating section 212 that heats the molten metal 214 housed in the crucible 211. The hot water supply device 300 supplies the molten metal 214 heated by the heating-up device 200 to the external processing machine 400 while maintaining its temperature. The control device 500 controls the amount of the solid metal material 101 that the melting device 100 turns into molten metal 214 and supplies to the crucible 211 according to the amount of the molten metal 214 supplied from the hot water supply device 300 to the external processing machine 400. According to this, this system supplies the solid-state metal material 101 to the crucible 211 as a liquid-state molten metal 214 using the melting device 100. Therefore, it is possible to supply the crucible 211 with a fixed amount and temperature of the molten metal 214 from the melting device 100. For this reason, since the heating-up heating unit 212 can increase the temperature of the molten metal 214 in the crucible 211 with a fixed heating energy, compared to individually output-controlling the heating energy for the crucible 211, the equipment cost can be reduced. Also, since the amount and temperature of the molten metal 214 in the crucible 211 are fixed, it is possible to keep the cleanliness of the molten metal 214 constant by sharing the purification treatment process. Therefore, this system can supply the external processing machine 400 with high-quality molten metal 214 of a fixed amount, fixed temperature, and fixed cleanliness, etc., from the crucible 211 via the hot water supply device 300. As a result, in the cast products processed by the external processing machine 400, variations in dimensional accuracy, internal quality, burr generation, etc., can be reduced, and a lean process design can be realized regarding production planning considering the defective rate, finishing in subsequent processes, etc. Furthermore, this system does not need to constantly keep a large amount of molten metal 214 warm, and makes the required amount of molten metal 214 at the required time using the melting device 100, heats it up in the crucible 211, and supplies it to the external processing machine 400. Therefore, it can contribute to carbon neutrality and further contribute to the safety of the production site.

[0043] (2) The melting device 100 provided in this system has an induction heating unit that heats the metal material 101 by electromagnetic induction, and is configured to directly supply the solid-state metal material 101 changed into the molten metal 214 to the crucible 211. The control device 500 is configured to control the melting speed of the metal material 101 by adjusting the output of the induction heating unit and adjust the amount of the molten metal 214 produced by the melting device 100. According to this, by adjusting the output of the induction heating unit, the melting rate of the metal material 101 is controlled, and the solid metal material 101 is directly supplied from the melting device 100 to the crucible 211 while being changed into the molten metal 214. Therefore, without holding the molten metal 214 in the melting device 100, the molten metal 214 at a necessary amount at a necessary time and at a temperature close to the melting point immediately after melting (that is, a constant temperature with little variation) can be supplied to the crucible 211.

[0044] (3) The melting device 100 has a molten metal amount detection unit that detects the amount of the molten metal 214 accommodated in the crucible 211. The control device 500 is configured to adjust the amount of the molten metal 214 produced by the melting device 100 based on the amount of the molten metal 214 detected by the molten metal amount detection unit. According to this, it is possible to supply the crucible 211 with the molten metal 214 having a target constant amount and a constant temperature with little variation from the melting device 100. Note that the molten metal amount detection unit is not limited to the molten metal surface detection unit 106 exemplified in one embodiment, and various sensors such as a load sensor or a contact sensor can be used, for example.

[0045] (4) The molten metal amount detection unit is, for example, a molten metal surface detection unit 106 that detects the height of the molten metal surface of the molten metal 214 accommodated in the crucible 211. The control device 500 is configured to control the melting rate of the metal material 101 by adjusting the output of the induction heating unit based on the height of the molten metal surface of the molten metal 214 detected by the molten metal surface detection unit 106, and to adjust the amount of the molten metal 214 produced by the melting device 100. According to this, it is possible to supply the crucible 211 with the molten metal 214 having a target constant amount and a constant temperature with little variation from the melting device 100.

[0046] (5) The heating unit 212 of the temperature raising device 200 of the present system is configured to heat the molten metal 214 accommodated in the crucible 211 with a certain amount of heating energy. According to this, since the molten metal 214 of a fixed quantity and at a fixed temperature is supplied to the crucible 211 from the melting device 100, by heating with a fixed amount of heating energy by the temperature raising and heating unit 212, it is possible to create the molten metal 214 that has been heated to a fixed temperature with little variation. Also, since the heating energy adjustment function in the temperature raising and heating unit 212 becomes unnecessary, the equipment cost can be reduced.

[0047] (6) The temperature raising device 200 of this system has a plurality of crucibles 211 and a plurality of temperature raising and heating units 212 provided respectively in each of the plurality of crucibles 211. By the way, if an induction heating type temperature raising and heating unit 212 is installed on the gantry where the plurality of crucibles 211 are installed, if the crucible 211 is not heated while the plurality of crucibles 211 move between each station, a heating output design considering the temperature drop during that time becomes necessary. Also, it leads to an increase in the temperature variation of the molten metal 214 from the time of temperature raising to the time of hot water supply. On the other hand, since the temperature raising device 200 of this system has a plurality of temperature raising and heating units 212 provided respectively in each of the plurality of crucibles 211, the crucible 211 is continuously heated even while the plurality of crucibles 211 move between each station, and the temperature variation of the molten metal 214 can be reduced.

[0048] (7) The temperature raising device 200 of this system has a purification ST that performs a purification process on the molten metal 214 supplied to the crucible 211 by a fixed operation. According to this, since the quantity and temperature of the molten metal 214 in the crucible 211 are fixed, by making the purification process steps in the purification ST common, it is possible to maintain a fixed high quality of cleanliness.

[0049] (8) In the purification ST, a gas pipe 221 that supplies an inert gas 222 to the molten metal 214 is provided at an arbitrary position between the center in the depth direction of the molten metal 214 supplied to the crucible 211 and the bottom of the crucible 211. According to this, by supplying the inert gas 222 to the molten metal 214 from near the bottom of the crucible 211, it is possible to reduce the generation of oxides in the molten metal 214.

[0050] (9) The hot water supply device 300 of this system includes a hot water pot 311 that takes out and holds the molten metal 214 from the crucible 211, and a weight measurement unit 319 that measures the weight of the hot water pot 311 in the three-axis directions of the orthogonal coordinate system set for the hot water pot 311. The control device 500 calculates the amount of the molten metal 214 taken out from the crucible 211 to the hot water pot 311 based on the difference between the weight of the hot water pot 311 measured by the weight measurement unit 319 before taking out the molten metal 214 from the crucible 211 to the hot water pot 311 and the weight of the hot water pot 311 measured by the weight measurement unit 319 after taking out the molten metal 214 from the crucible 211 to the hot water pot 311. According to this, since the control device 500 calculates the amount of the molten metal 214 taken out from the crucible 211 to the hot water pot 311 based on the weight difference of the hot water pot 311, even when metal residues remain fixed or the like at the bottom of the hot water pot 311, it is possible to take out the target amount of the molten metal 214 from the crucible 211 to the hot water pot 311. Therefore, the hot water supply device 300 can supply the target amount of the molten metal 214 from the hot water pot 311 to the external processing machine 400. Furthermore, since the control device 500 uses the weight measurement unit 319 that measures the weight of the hot water pot 311 in the three-axis directions, even when the hot water supply device 300 is tilted with respect to the vertical direction, it is possible to take out the target amount of the molten metal 214 from the crucible 211 to the hot water pot 311. Therefore, the hot water supply device 300 can supply the target amount of the molten metal 214 from the hot water pot 311 to the external processing machine 400.

[0051] (10) The control device 500 of this system is configured to continuously measure the weight of the hot water pot 311 with the weight measurement unit 319 when sucking the molten metal 214 from the crucible 211 to the hot water pot 311, and suck the required amount of the molten metal 214 from the crucible 211 to the hot water pot 311. According to this, when the control device 500 sucks the molten metal 214 from the crucible 211 into the hot water supply pot 311, it sucks the necessary amount of the molten metal 214 while continuously measuring the weight of the hot water supply pot 311. Therefore, it is possible to take out the target amount of the molten metal 214 from the crucible 211 into the hot water supply pot 311. For this reason, the hot water supply device 300 can supply the target amount of the molten metal 214 from the hot water supply pot 311 to the external processing machine 400. In addition, as described above, the control device 500 continuously measures the weight of the hot water supply pot 311 before taking out the molten metal 214 from the crucible 211 into the hot water supply pot 311 and after taking out the molten metal 214 from the crucible 211 into the hot water supply pot 311, and calculates the amount of the molten metal 214 taken out from the crucible 211 into the hot water supply pot 311 based on the difference. Therefore, the hot water supply device 300 can supply a more accurate amount of the molten metal 214 from the hot water supply pot 311 to the external processing machine 400.

[0052] (11) The hot water supply device 300 of this system includes a hot water temperature detection unit 315 that detects the temperature of the molten metal 214 held in the hot water supply pot 311, and a hot water heating unit 316 that heats the molten metal 214 held in the hot water supply pot 311. The control device 500 is configured to adjust the energy for heating the molten metal 214 by the hot water heating unit 316 based on the temperature of the molten metal 214 detected by the hot water temperature detection unit 315. According to this, the hot water supply device 300 can supply the molten metal 214 at a constant temperature to the external processing machine 400 while reliably maintaining the temperature of the molten metal 214 heated by the temperature raising device 200.

[0053] (12) The hot water supply device 300 of this system has a heat insulating wall 317 provided outside the hot water supply pot 311. The heat insulating wall 317 is made of a material having a lower thermal conductivity than the hot water supply pot 311, and can suppress the heat dissipation of the molten metal 214 held in the hot water supply pot 311. According to this, the hot water supply device 300 can supply the molten metal 214 at a constant temperature to the external processing machine 400 while more reliably maintaining the temperature of the molten metal 214 heated by the temperature raising device 200. In addition, the energy for heating the molten metal 214 by the hot water heating unit 316 can be reduced.

[0054] (13) The inner wall 321 of the bottom of the hot water pot 311 has a tapered shape at an angle exceeding 0° with respect to a virtual plane perpendicular to the axis CL of the hot water pot 311. According to this, when supplying the molten metal 214 from the hot water supply device 300 to the external processing machine 400, even when the hot water pot 311 is inclined with respect to the vertical direction, it is possible to reduce the adhesion of the residue of the molten metal 214 to the inner wall 321 of the bottom of the hot water pot 311. Therefore, a more accurate amount of the molten metal 214 can be supplied from the hot water supply device 300 to the external processing machine 400.

[0055] (Other embodiments) The present disclosure is not limited to the above-described embodiments, and can be appropriately changed within the scope described in the claims. Also, the above-described embodiments and some of them are not unrelated to each other, and can be appropriately combined except when the combination is clearly impossible. Further, in the above-described embodiments, the elements constituting the embodiments are not necessarily essential except when clearly specified as essential and when considered to be clearly essential in principle. Also, in the above-described embodiments, when numerical values such as the number, numerical value, amount, and range of the components of the embodiments are mentioned, they are not limited to the specific number except when clearly specified as essential and when clearly limited to a specific number in principle. Further, in the above-described embodiments, when referring to the shape, positional relationship, etc. of the components, etc., they are not limited to the shape, positional relationship, etc. except when clearly specified and when clearly limited to a specific shape, positional relationship, etc. in principle.

[0056] The control device 500 and its method described in the present disclosure may be implemented by a dedicated computer configured by a processor and a memory programmed to execute one or more functions embodied by a computer program. Alternatively, the control device 500 and its method described in the present disclosure may be implemented by a dedicated computer provided by configuring a processor with one or more dedicated hardware logic circuits. Or, the control device 500 and its method described in the present disclosure may be implemented by one or more dedicated computers configured by a combination of a processor and a memory programmed to execute one or more functions and a processor configured by one or more hardware logic circuits. Further, the computer program may be stored in a computer-readable non-transitory tangible recording medium as instructions to be executed by a computer. The above-mentioned memory is a non-transitory physical storage medium.

[0057] (From the perspective of the present disclosure) The present disclosure described above can be understood, for example, from the following perspectives. [First perspective] In a metal melting, heating, and supplying system that melts a solid-state metal material (101), raises its temperature, and supplies it to an external processing machine (400), a melting device (100) that heats the metal material to convert it into a molten metal (214) in a liquid state; a temperature-raising device (200) having a heat-resistant container (211) that stores the molten metal produced by the melting device and a temperature-raising heating unit (212) that heats the molten metal stored in the heat-resistant container; a hot water supply device (300) that supplies the molten metal heated by the temperature-raising device to the external processing machine while maintaining the temperature of the molten metal; and a control device (500) that controls the amount of the metal material in a solid state converted into molten metal by the melting device and supplied to the heat-resistant container according to the amount of molten metal supplied from the hot water supply device to the external processing machine. A metal melting, heating, and supplying system. [Second perspective] The melting device has an induction heating unit (102) that heats the metal material by electromagnetic induction, and is configured to change the metal material into molten metal and directly supply it to the heat-resistant container. The control device is configured to control the melting rate of the metal material by adjusting the output of the induction heating unit and adjust the amount of molten metal produced by the melting device, according to the metal melting temperature-raising supply system described in the first aspect. [Third aspect] The melting device has a molten metal amount detection unit (106) that detects the amount of molten metal contained in the heat-resistant container. The control device is configured to control the melting rate of the metal material by adjusting the output of the induction heating unit based on the amount of molten metal detected by the molten metal amount detection unit and adjust the amount of molten metal produced by the melting device, according to the metal melting temperature-raising supply system described in the second aspect. [Fourth aspect] The molten metal amount detection unit is a liquid level detection unit (106) that detects the liquid level height of the molten metal contained in the heat-resistant container. The control device is configured to control the melting rate of the metal material by adjusting the output of the induction heating unit based on the liquid level height of the molten metal detected by the liquid level detection unit and adjust the amount of molten metal produced by the melting device, according to the metal melting temperature-raising supply system described in the third aspect. [Fifth aspect] The temperature-raising heating unit is configured to heat the molten metal contained in the heat-resistant container with a certain amount of heating energy, according to the metal melting temperature-raising supply system described in any one of the first to fourth aspects. [Sixth aspect] The temperature-raising device has a plurality of the heat-resistant containers and a plurality of the temperature-raising heating units provided for each of the plurality of the heat-resistant containers, according to the metal melting temperature-raising supply system described in any one of the first to fifth aspects. [Seventh aspect] The temperature-raising device has a purification processing unit that performs a purification process on the molten metal supplied to the heat-resistant container by a certain operation, according to the metal melting temperature-raising supply system described in any one of the first to sixth aspects. [Eighth Aspect] The metal melting and temperature-raising supply system according to the seventh aspect, wherein the purification processing unit is provided with a gas pipe (221) for supplying an inert gas (222) to the molten metal at an arbitrary position between the center in the depth direction of the molten metal supplied to the heat-resistant container and the inner wall of the bottom of the heat-resistant container. [Ninth Aspect] The hot water supply device includes a hot water supply container (311) that takes out molten metal from the heat-resistant container and holds it in a sealed space, and a weight measurement unit (319) that measures the weight of the hot water supply container in three axial directions of a rectangular coordinate system set for the hot water supply container. The control device calculates the amount of molten metal taken out from the heat-resistant container to the hot water supply container based on the difference between the weight of the hot water supply container measured by the weight measurement unit before taking out the molten metal from the heat-resistant container to the hot water supply container and the weight of the hot water supply container measured by the weight measurement unit after taking out the molten metal from the heat-resistant container to the hot water supply container. The metal melting and temperature-raising supply system according to any one of the first to eighth aspects. [Tenth Aspect] The control device is configured to suck a required amount of molten metal from the heat-resistant container to the hot water supply container while continuously measuring the weight of the hot water supply container with the weight measurement unit when sucking the molten metal from the heat-resistant container to the hot water supply container. The metal melting and temperature-raising supply system according to the ninth aspect. [Eleventh Aspect] The hot water supply device includes a hot water temperature detection unit (315) that detects the temperature of the molten metal held in the hot water supply container, and a hot water heating unit (316) that heats the molten metal held in the hot water supply container. The control device is configured to adjust the energy for heating the molten metal with the hot water heating unit based on the temperature of the molten metal detected by the hot water temperature detection unit. The metal melting and temperature-raising supply system according to the ninth or tenth aspect. [Twelfth Aspect] The hot water supply device has a heat insulating wall (317) provided outside the hot water supply container. The heat insulation wall is made of a material with a lower thermal conductivity than the hot water supply container, and can suppress heat dissipation of the molten metal held in the hot water supply container, the metal melting and temperature rising supply system according to any one of the ninth to eleventh aspects. [Aspect 13] The bottom inner wall (321) of the hot water supply container has a tapered shape at an angle exceeding 0° with respect to a virtual plane perpendicular to the axis (CL) of the hot water supply container, the metal melting and temperature rising supply system according to any one of the ninth to twelfth aspects. [Aspect 14] In a hot water supply device (300) that supplies molten metal (214) obtained by melting a metal material (101) to an external processing machine (400), a hot water supply container (311) that takes out molten metal from a heat-resistant container (211) in which the molten metal is stored and holds it in a sealed space, a weight measurement unit (319) that measures the weight of the hot water supply container in three axial directions of a rectangular coordinate system set for the hot water supply container, Based on the difference between the weight of the hot water supply container measured by the weight measurement unit before taking out the molten metal from the heat-resistant container to the hot water supply container and the weight of the hot water supply container measured by the weight measurement unit after taking out the molten metal from the heat-resistant container to the hot water supply container, a control device (500) that calculates the amount of molten metal taken out from the heat-resistant container to the hot water supply container, a hot water supply device comprising.

[0058] In addition, with respect to the fourteenth aspect, it is possible to arbitrarily combine the contents described in the tenth to thirteenth aspects.

Explanation of reference numerals

[0059] 100 Melting device 101 Metal material 200 Temperature rising device 211 Heat-resistant container (crucible) 212 Temperature rising heating unit 214 Molten metal 300 Hot water supply device 400 External processing machine 500 Control device

Claims

1. In a metal melting and temperature-raising supply system that melts a solid metal material (101), raises its temperature, and supplies it to an external processing machine (400), a melting device (100) that heats the metal material to turn it into a molten metal (214) in a liquid state; a temperature-raising device (200) having a heat-resistant container (211) that houses the molten metal produced by the melting device, and a temperature-raising heating unit (212) that heats the molten metal housed in the heat-resistant container; a hot water supply device (300) that supplies the molten metal heated by the temperature-raising device to the external processing machine while maintaining its temperature; a control device (500) that controls the amount of the metal material melted by the melting device into molten metal and supplied to the heat-resistant container according to the amount of molten metal supplied from the hot water supply device to the external processing machine. A metal melting and temperature-raising supply system comprising the above components.

2. The melting device has an induction heating unit (102) that heats the metal material by electromagnetic induction, and is configured to turn the metal material into molten metal and directly supply it to the heat-resistant container. The control device is configured to control the melting speed of the metal material by adjusting the output of the induction heating unit and adjust the amount of molten metal produced by the melting device. The metal melting and temperature-raising supply system according to Claim 1.

3. The melting device has a molten metal amount detection unit (106) that detects the amount of molten metal housed in the heat-resistant container. The control device is configured to control the melting speed of the metal material by adjusting the output of the induction heating unit based on the amount of molten metal detected by the molten metal amount detection unit and adjust the amount of molten metal produced by the melting device. The metal melting and temperature-raising supply system according to Claim 2.

4. The molten metal amount detection unit is a liquid level detection unit (106) that detects the liquid level height of the molten metal housed in the heat-resistant container. The control device is configured to control the melting speed of the metal material by adjusting the output of the induction heating unit based on the liquid level height of the molten metal detected by the liquid level detection unit and adjust the amount of molten metal produced by the melting device. The metal melting and temperature-raising supply system according to Claim 3.

5. The temperature-raising heating unit is configured to heat the molten metal housed in the heat-resistant container with a certain amount of heating energy. The metal melting and temperature-raising supply system according to any one of Claims 1 to 4.

6. The heating device has a plurality of the heat-resistant containers and a plurality of the heating parts provided for each of the plurality of the heat-resistant containers. The metal melting and heating supply system according to any one of claims 1 to 4.

7. The heating device has a purification processing part that performs a purification process on the molten metal supplied to the heat-resistant container by a certain operation. The metal melting and heating supply system according to any one of claims 1 to 4.

8. The purification processing part is provided with a gas pipe (221) for supplying an inert gas (222) to the molten metal from an arbitrary position between the center in the depth direction of the molten metal supplied to the heat-resistant container and the inner wall of the bottom of the heat-resistant container. The metal melting and heating supply system according to claim 7.

9. The hot water supply device has a hot water supply container (311) that takes out molten metal from the heat-resistant container and holds it in a sealed space, and a weight measurement part (319) that measures the weight of the hot water supply container in three axial directions of a rectangular coordinate system set for the hot water supply container. The control device calculates the amount of molten metal taken out from the heat-resistant container to the hot water supply container based on the difference between the weight of the hot water supply container measured by the weight measurement part before taking out the molten metal from the heat-resistant container to the hot water supply container and the weight of the hot water supply container measured by the weight measurement part after taking out the molten metal from the heat-resistant container to the hot water supply container. The metal melting and heating supply system according to any one of claims 1 to 4.

10. The control device is configured to continuously measure the weight of the hot water supply container with the weight measurement part when sucking the molten metal from the heat-resistant container to the hot water supply container, and suck a required amount of molten metal from the heat-resistant container to the hot water supply container. The metal melting and heating supply system according to claim 9.

11. The hot water supply device has a hot water temperature detection part (315) that detects the temperature of the molten metal held in the hot water supply container, and a hot water heating part (316) that heats the molten metal held in the hot water supply container. The control device is configured to adjust the energy for heating the molten metal with the hot water heating part based on the temperature of the molten metal detected by the hot water temperature detection part. The metal melting and heating supply system according to claim 9.

12. The hot water supply device has a heat insulation wall (317) provided outside the hot water supply container. The metal melting temperature-raising supply system according to claim 9, wherein the heat insulation wall is made of a material having a lower thermal conductivity than the hot water supply container and can suppress heat dissipation of the molten metal held in the hot water supply container.

13. The metal melting temperature-raising supply system according to claim 9, wherein the inner wall of the bottom (321) of the hot water supply container has a tapered shape at an angle exceeding 0° with respect to a virtual plane perpendicular to the axis (CL) of the hot water supply container.

14. In a hot water supply device (300) that supplies molten metal (214) obtained by melting a metal material (101) to an external processing machine (400), a hot water supply container (311) that takes out molten metal from a heat-resistant container (211) containing the molten metal and holds it in a sealed space; a weight measurement unit (319) that measures the weight of the hot water supply container in three axial directions of a rectangular coordinate system set for the hot water supply container; a control device (500) that calculates the amount of molten metal taken out from the heat-resistant container to the hot water supply container based on the difference between the weight of the hot water supply container measured by the weight measurement unit before taking out the molten metal from the heat-resistant container to the hot water supply container and the weight of the hot water supply container measured by the weight measurement unit after taking out the molten metal from the heat-resistant container to the hot water supply container. A hot water supply device comprising:

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