JP5492356B2 - Method and apparatus for dissolving and supplying metal material - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a technique for melting and supplying a metal material and a melting and supplying apparatus, and more particularly, melting and supplying a metal material by induction heating and supplying the molten metal material to a casting apparatus and melting method. It relates to a supply device.

  Conventionally, as a method for melting and supplying a metal material by melting a metal material to form a molten metal and supplying the molten metal material (molten metal) to a casting apparatus such as a die casting machine, for example, a large melting furnace is first used several times. The amount of metal material ingot required for casting is melted, a large amount of molten metal is held in a large melting furnace, and then the amount required for one casting from a large amount of molten metal with a ladle or pump for hot water supply A method of measuring and supplying the is known.

  By the way, in the melting supply method using the large melting furnace described above, since the surface area of the molten metal held in the large melting furnace is large and the amount of thermal diffusion is large, the thermal efficiency is poor, and as a result, the amount of electricity and gas energy used is low. There was a problem that the running cost increased as the number increased. In addition, the molten metal is often held even when the apparatus is stopped such as on a holiday or at night, so it is necessary to prevent the leakage of molten metal due to the melting furnace being damaged, etc. There was also a problem that the equipment cost increased.

  From this point of view, in the conventional method for melting and supplying a metal material, a melting and supplying method for melting and supplying an amount of metal material necessary for one casting for each casting has been proposed. Specifically, as a conventional method for melting and supplying a metal material, as disclosed in Patent Literature 1 and Patent Literature 2, a melting furnace disposed at a predetermined position with respect to a casting apparatus is placed in a high-temperature atmosphere and A method has been proposed in which an inert gas atmosphere is supplied, a required amount of metal material is supplied to the melting furnace for each casting, melted by induction heating, and the melting furnace is tilted to supply the molten metal to the casting apparatus. ing.

  According to the melting and supplying method of the metal material disclosed in Patent Document 1 and Patent Document 2 described above, the amount of metal material necessary for one casting is surely melted for each casting, and the casting is performed once. Since only the required amount of molten metal is supplied, the amount of molten metal held in the melting furnace can be reduced, and the thermal efficiency can be improved compared to the melting supply method using the large melting furnace described above, and the melting supply apparatus is simplified. It becomes possible to comprise. However, in this conventional method for melting and supplying a metal material, the molten metal held in the melting furnace is all used in one casting, and a new metal material is supplied to the melting furnace for each casting. Since it is necessary to replenish the molten metal inside, especially when melting the metal material using induction heating, the melting time and heating capacity of the metal material are increased, making it difficult to shorten the casting cycle and improving the operation efficiency. There was a problem of being inferior.

JP 2003-1397 A JP 2002-103023 A

  Therefore, the present invention relates to a method and apparatus for melting and supplying a metal material, which solves the above-described conventional problems, and reduces the melting time of the metal material and shortens the melt supply cycle. A supply method and a dissolution supply apparatus are provided.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

That is, in claim 1, the induction heating by dissolving the metal material, the dissolution method for supplying a metallic material for supplying metal material dissolved in casting apparatus, inducing a molten melting furnace held in advance a predetermined amount of the molten metal heating A preheating step for heating to a predetermined temperature, and a metal material supplying step for heating and supplying to the melting furnace holding the molten metal heated in the preheating step to a temperature at which only a predetermined amount of the metal material is not melted. A melting step in which the state of the molten metal in the melting furnace in the preheating step is changed and heated to the melting temperature of the metal material, and the metal material supplied to the melting furnace in the metal material supply step is melted by induction heating; And a molten metal supply step of supplying a quantity of molten metal required for one casting with the casting apparatus while leaving the molten metal in the melting furnace.

According to a second aspect of the present invention, the preliminary heating step starts heating immediately after the molten metal is supplied in the molten metal supplying step.

According to a third aspect of the present invention, there is provided a metal material melting and supplying apparatus for melting a metal material by induction heating and supplying the molten metal material to a casting apparatus, and a heating device for heating the metal material is provided. A supply device that heats and supplies only the metal material to a temperature that does not melt, and a capacity that can hold more molten metal than the amount of molten metal required for one casting in the casting device, A melting furnace for storing the supplied metal material, and heating a predetermined amount of molten metal previously held in the melting furnace to a predetermined temperature and changing the state of the molten metal in the melting furnace to a melting temperature of the metal material and, it comprises a, an induction heating device for dissolving by induction heating the metal material supplied to the melting furnace by the supply device, wherein the melting furnace from the supply device to a predetermined amount of the molten metal held in advance While holding the molten metal by dissolving the sheet metal material, while leaving the molten metal, in which is tilted to provide a quantity of molten metal required for one casting by the casting apparatus.

According to a fourth aspect of the present invention, the heating device is a hot air heating device that heats a metal material by blowing hot air at a predetermined temperature.

  As an effect of the present invention, the melting time of the metal material can be reduced and the melting supply cycle can be shortened.

The figure which showed the structure of the melt | dissolution supply and delivery apparatus of the metal material which concerns on one Example of this invention. The flowchart which showed the melt | dissolution supply method of the metal material of a present Example. The figure which showed operation | movement of the melt | dissolution supply apparatus of the metal material in a melt | dissolution supply cycle. The flowchart which showed the melt | dissolution supply method of the metal material of another Example. The figure which showed the structure of the melt | dissolution supply delivery apparatus of the metal material which concerns on another Example.

  Next, embodiments of the invention will be described.

First, the overall configuration of the melting and supplying apparatus 1 for the metal material 2 according to the present embodiment will be outlined below.
As shown in FIG. 1, the metal material 2 melting and supplying apparatus 1 of this embodiment is an apparatus that melts the metal material 2 by induction heating and supplies the molten metal material 2 (molten metal 3) to the casting apparatus 4. . Specifically, the melting and supplying apparatus 1 of the present embodiment includes a housing 5, a supplying apparatus 6 that supplies the metal material 2 to the melting furnace 7, and a melting furnace that houses the metal material 2 supplied by the supplying apparatus 6. 7 and an induction heating device 8 or the like for melting the metal material 2 accommodated in the melting furnace 7 by induction heating. The metal material 2 is supplied to the melting furnace 7 holding a predetermined amount of the molten metal 3 in advance. This is melted, and a predetermined amount of the molten metal 3 is left in the melting furnace 7, while an amount of the molten metal 3 required for one casting is supplied by the casting apparatus 4.

  As the metal material 2, in addition to an aluminum alloy or a zinc alloy, an arbitrary metal such as a magnesium alloy, copper, an alloy thereof, or an iron-based alloy is selected. The shape of the metal material 2 is not particularly limited, and may be mainly formed into a granular shape, a pellet shape or an ingot shape, or a deformed piece or scrap of iron having a different shape or size. Hereinafter, the case where the ingot-shaped metal material 2 is used is demonstrated in the melt | dissolution supply apparatus 1 of a present Example.

  The casting apparatus 4 is configured as a die casting machine including a casting mold 40 for obtaining a die casting product by a casting method. Usually, such a casting apparatus 4 is provided with an injection sleeve for injecting and filling the molten metal 3 supplied from the melting supply apparatus 1 through the hot water inlet into the cavity of the casting mold 40, and the like. A target die-cast product is obtained by solidifying the molten metal 4 filled in the cavity of the casting mold 40.

  The housing 5 is configured such that a closed space 51 that is blocked from the external space is formed inside by the wall member 50, and the supply device 6 is continuously provided on one side surface of the wall member 50, and the closed space In 51, a melting furnace 7 and an induction heating device 8 are arranged. The wall member 50 is formed from a heat-resistant material having a higher melting point than the metal material 2, such as surface-treated stainless steel, for example.

  On the other side surface of the wall member 50 of the housing 5, a supply port 52 that communicates the external space and the closed space 51 is opened. The supply port 52 can be opened and closed by a shutter member 53. The supply port 52 is an opening for supplying the molten metal 3 held in the melting furnace 7 to the casting apparatus 4, and specifically, the molten metal is introduced via the supply port 52 by tilting the melting furnace 7. 3 is discharged into the external space (outside the housing 5), and the discharged molten metal 3 is supplied to the casting apparatus 4 disposed below the supply port 52. When the metal member 2 is melted, the shutter member 53 is operated so as to close the supply port 52 to prevent inflow of external air from the closed space 51. On the other hand, when the molten metal 3 is supplied, The external space and the closed space 51 are communicated by operating to open the supply port 52.

  Further, a gas supply device 54 is connected to the housing 5 of the present embodiment, and an inert gas such as argon gas or nitrogen gas is supplied into the closed space 51 by the gas supply device 54, so that the inside of the closed space 51. Is configured to be an inert gas atmosphere. As described above, the inert gas is supplied to the closed space 51 by the gas supply device 54, thereby preventing the molten metal 3 held in the melting furnace 7 from being oxidized.

  The supply device 6 is a device for supplying the metal material 2 to the melting furnace 7 disposed in the housing 5, and the supply device 6 of this embodiment supplies the metal material 2 to be supplied to the melting furnace 7. It is comprised so that quantity and temperature can be adjusted arbitrarily. Specifically, the supply device 6 includes a transport duct 60 connected to the housing 5, a transport conveyor 61 that places and transports the metal material 2 on the upper surface, and a metal material 2 that is transported by the transport conveyor 61. It is comprised with the heater 62 etc. as a heating apparatus which heats to predetermined temperature.

  The transport duct 60 is formed in a tubular shape having a rectangular cross section, extends through the wall member 50 of the housing 5 into the closed space 51, and the metal material 2 transported through the transport duct 60 at the open end. Is formed and an open end portion 60a is formed to be supplied to the melting furnace 7. In addition, a metal material 2 inlet 60b is opened at the other end of the conveyance duct 60, and the metal material 2 is introduced into the conveyance duct 60 through the inlet 60b. The transfer duct 60 of the present embodiment is formed so that the opening end portion 60a is positioned substantially vertically above the melting furnace 7 (the main body portion 70).

  The transport conveyor 61 is laid in the internal space of the transport duct 60, and a plurality of metal materials 2, 2... Are always placed on the upper surface, and the metal materials 2 are sequentially transported in the direction of the opening end 60a. The drive is controlled as follows. The supply device 6 is adjusted so that a desired amount of the metal material 2 is supplied to the melting furnace 7 by the transport conveyor 61. In this embodiment, the supply amount of the metal material 2 supplied by the conveyor 61 is an amount of the metal material 2 corresponding to the amount of the molten metal 3 required for one casting in the casting apparatus 4 per melting supply cycle described later. Is adjusted to be supplied to the melting furnace 7. However, the supply amount of the metal material 2 can be adjusted by changing the type of the metal material 2 and the amount of the molten metal 3 supplied to the casting apparatus 4.

  The heater 62 is a general-purpose heater such as a hot plate or a sheathed heater, and is laid along the conveyance direction of the metal material 2 at a position below the conveyance conveyor 61. The heater 62 is controlled to be heated so that the metal material 2 placed on the upper surface of the conveyor 61 has a predetermined temperature. As a method for controlling the heating of the metal material 2, for example, the temperature of the metal material 2 on the transport conveyor 61 detected by a heating sensor (not shown) provided in the transport duct 60 is adjusted to a predetermined temperature. Is done. The temperature of the metal material 2 heated by the heater 62 is high enough not to dissolve the metal material 2, and is preferably about 200 ° C. to 400 ° C. depending on the type and amount of the metal material 2 used. It is adjusted to become.

  The supply device 6 of the present embodiment is provided with a shutter member (not shown) that shuts off the internal space of the transfer duct 60 and the closed space 51 of the housing 5 at the opening end 60a of the transfer duct 60, as described above. The inert gas supplied by the gas supply device 54 is configured not to leak into the external space via the transfer duct 60.

  The melting furnace 7 is formed by a main body portion 70 having a U-shaped cross section made of a highly heat-resistant material, and a pouring port 71 protruding in the radial direction is provided on the upper surface edge portion of the main body portion 70. The melting furnace 7 (the main body 70 and the pouring port 71) is formed of an insulating material such as ceramics or a conductive material such as copper or graphite. In the main body 70, the metal material 2 supplied by the supply device 6 is accommodated, and the accommodated metal material 2 is melted by an induction heating device 8 described later, and the molten metal 3 is held.

  The melting furnace 7 (the main body part 70) is formed in a capacity capable of holding at least the amount of the molten metal 3 required for one casting by the casting apparatus 4, and is specifically held in advance. The predetermined amount of molten metal 3 and the amount of molten metal 3 required for one casting by the casting apparatus 4 are combined and can be held. In the melting furnace 7 of the present embodiment, a predetermined amount of the molten metal 3 is held in advance, and the metal material 2 is supplied from the supply device 6 in a state where the molten metal 3 is held. The amount of the molten metal 3 required for one casting is added and held. By the molten metal 3 held in advance, melting of the metal material 2 supplied to the melting furnace 7 is promoted. The holding amount is changed depending on the type and amount of the metal material 2 used or the amount of the molten metal 3 supplied to the casting apparatus 4.

  In addition, the melting furnace 7 can discharge the molten metal 3 from the pouring port 71 through the supply port 52 provided in the housing 5 by tilting the main body 70 by a tilting mechanism (not shown) in the housing 5. It is attached. The configuration of this tilting mechanism is not particularly limited, but as an example, it can be configured by a tilting shaft portion that supports the melting furnace 7 so as to be tiltable, a servo motor (not shown) that rotationally drives the tilting shaft portion, or the like.

  The tilting operation of the melting furnace 7 will be described. First, the metal material 2 supplied by the supply device 6 is accommodated in a state where the melting furnace 7 is stopped at the reference position P1 where the main body portion 70 is opened upward. The metal material 2 is melted by induction heating by an induction heating device 8 described later, and the molten metal 3 is held. On the other hand, a tilting mechanism (not shown) is tilted from the reference position P1, and the pouring port 71 is held in a state where the melting furnace 7 is stopped at the molten metal supply position P2 protruding from the supply port 52 of the housing 5 to the external space. The molten metal 3 is supplied from the pouring port 71 to the casting apparatus 4.

  At this time, the melting furnace 7 of the present embodiment is tilted from the reference position P1 to the molten metal supply position P2 so as to supply the molten metal 3 required for one casting by the casting apparatus 4 while the molten metal 3 remains. Is done. In other words, the melting furnace 7 supplies only the amount of the molten metal 3 required for one casting by the casting apparatus 4 while leaving the molten metal 3 in the melting furnace 7 from all the molten metal 3 held. It is tilted to do. As a method for controlling the supply amount (remaining amount) of the molten metal 3 in the melting furnace 7, for example, an angle sensor for detecting the tilt angle of the melting furnace 7 is separately provided in a tilt mechanism (not shown), and the angle sensor is used. This is performed by controlling the amount of the molten metal 3 discharged from the melting furnace 7 (or the amount of the molten metal 3 remaining in the melting furnace 7) based on the detected tilt angle. The remaining amount of the molten metal 3 is changed depending on the type and amount of the metal material 2 used or the amount of the molten metal 3 supplied to the casting apparatus 4.

  The induction heating device 8 includes an induction heating coil 80, a high-frequency power source 81 connected to the induction heating coil 80, and the like. The induction heating coil 80 is disposed in a spiral shape along the outer peripheral surface of the main body portion 70 of the melting furnace 7 in the housing 5. The induction heating coil 80 of the present embodiment is formed of a hollow tube material, and cooling water is supplied to the hollow interior, and an outer peripheral surface is covered with an insulating material such as ceramics.

  When the metal material 2 held in the melting furnace 7 is melted by the induction heating device 8, an alternating high-frequency current is supplied from the high-frequency power source 81 to the induction heating coil 80 to generate an alternating magnetic flux in the induction heating coil 80. . Since this alternating magnetic flux induces an eddy current in the metal material 2, the metal material 2 is heated by resistance heat generation due to the eddy current generated in the metal material 2 and heat generation caused by hysteresis loss due to the alternating magnetic flux from the induction heating coil 80. . In this way, the metal material 2 is melted by being heated to the melting temperature.

  The induction heating device 8 can not only melt the metal material 2 supplied to the melting furnace 7 by induction heating but also control the temperature of the molten metal 3 by heating the molten metal 3 held in the melting furnace 7 by induction heating. It is configured as follows. As a heating control method using such an induction heating device 8, for example, a high-frequency power source is used so that the temperature of the molten metal 3 in the melting furnace 7 detected by a temperature sensor (not shown) provided in the housing 5 becomes a predetermined temperature. The current frequency output from 81 is controlled, and the heating state by the induction heating coil 80 is controlled. In particular, in the present embodiment, since the molten metal 3 is constantly held in the melting furnace 7, the temperature is controlled by the induction heating device 8 so that the molten metal 3 has a desired set temperature.

  Next, a method for dissolving and supplying the metal material 2 using the melting and supplying apparatus 1 of this embodiment will be described below. In the present embodiment, a cycle from the time when the metal material 2 is melted to the time when the molten metal 3 is supplied to the casting apparatus 4 (hereinafter referred to as a melt supply cycle) will be described.

  As shown in FIGS. 2 and 3, the method for melting and supplying the metal material 2 according to the present embodiment melts the metal material 2 by induction heating and melts the metal material 2 supplied to the casting apparatus 4. A metal material supplying step S100 for supplying the metal material 2 to the melting furnace 7 holding a predetermined amount of the molten metal 3 in advance, and the metal material 2 supplied to the melting furnace 7 in the metal material supplying step S100. A melting step S110 that melts by induction heating, and a melt supply step S120 that supplies the amount of molten metal 3 required for one casting by the casting apparatus 4 while leaving the molten metal 3 in the melting furnace 7. It is.

  Here, the molten metal 3 previously held in the melting furnace 7 is referred to as a holding molten metal 3a, and an amount of the molten metal 3 required for one casting in the casting apparatus 4 is referred to as a supplying molten metal 3b. The molten metal 3 combined with the molten metal for supply 3b is referred to as a total molten metal 3c (see FIG. 3).

  First, in the metal material supply step S <b> 100, the metal material 2 is supplied to the melting furnace 7 by the supply device 6. The inside of the housing 5 is adjusted to the inert gas atmosphere supplied by the gas supply device 54. The melting furnace 7 is stopped at the reference position P1, and the holding molten metal 3a is held in advance (see FIG. 3A). At this time, the holding molten metal 3a held in the melting furnace 7 is heated by induction heating by the induction heating device 8 and adjusted to a predetermined temperature (preheating step).

  In the supply device 6, the metal material 2 is heated by the heater 62 and adjusted to a predetermined temperature, and the heated metal material 2 is transported in the transport duct 60 by the transport conveyor 61. Then, an amount of the metal material 2 corresponding to the amount of the molten metal 3 required for one casting is discharged from the opening end 60a and accommodated in the main body 70 of the melting furnace 7 (FIG. 3). (See (b)).

  Next, in the melting step S110, the induction heating device 8 controls the high frequency power supply 81 to change the heating state by the induction heating coil 80, and the metal material 2 is heated to the melting temperature and supplied to the melting furnace 7. The metal material 2 is dissolved. In this way, the molten furnace 7 holds the entire molten metal 3a, which is a combination of the holding molten metal 3a and the supply molten metal 3b required for one casting by the casting apparatus 4 (FIG. 3 (c). )reference).

  In the molten metal supply step S120, the melting furnace 7 is tilted from the reference position P1 to the molten metal supply position P2 while the shutter member 53 of the housing 5 is operated and the opening 52 is opened. Of the total molten metal 3c held in the furnace 7, the same amount of molten metal 3 as that of the holding molten metal 3a remains, and the amount of molten metal 3 required for one casting in the casting apparatus 4, that is, the molten metal 3b for supply is reduced. It is supplied from the pouring spout 71 to the casting apparatus 4 (see FIG. 3D). When the supply of the molten metal 3 to the casting apparatus 4 is completed, the melting furnace 7 is tilted again and returned from the molten metal supply position P2 to the reference position P1.

  In the present embodiment, the melting supply cycle described above is continuously repeated, so that the casting apparatus 4 continuously supplies the amount of the molten metal 3 required for one casting to the casting apparatus 4.

  As described above, the method for melting and supplying the metal material 2 according to the present embodiment is a method for melting and supplying the metal material 2 by melting the metal material 2 by induction heating and supplying the molten metal material 2 to the casting apparatus 4. A metal material supply step S100 for supplying the metal material 2 to the melting furnace 7 holding a predetermined amount of the molten metal 3 in advance, and the metal material 2 supplied to the melting furnace 7 in the metal material supply step S100 is melted by induction heating. Since it has melting process S110 and molten metal supply process S120 which supplies the quantity of molten metal 3 required for one casting with casting device 4, leaving molten metal 3 in melting furnace 7, melting time of a metal material Thus, the dissolution supply cycle can be shortened.

That is, according to the melting and supplying method of the present embodiment, the metal material 2 is supplied to the melting furnace 7 holding a predetermined amount of the molten metal 3 in advance, and the metal material 2 is melted in such a state. The melting efficiency of the metal material 2 can be reduced and the amount of electrical energy used during induction heating can be reduced.
Further, in the melting and supplying method of the present embodiment, the molten metal 3 held in the melting furnace 7 is not used in one casting, but the molten metal 3 is left in the melting furnace 7. Even when the new metal material 2 is supplied to the melting furnace 7 and the molten metal 3 is replenished, the new metal material 2 may be supplied to the molten metal 3 held in the melting furnace 7. Combined with the effect that the melting time of the metal material 2 is reduced, the melting and feeding cycle can be shortened, and the operation efficiency of the melting and feeding apparatus 1 is dramatically improved by continuing the melting and feeding cycle. Can be improved.
Furthermore, in the melting and supplying method of the present embodiment, the metal material 2 is melted in addition to the molten metal 3 held in advance, so that variations in the amount and temperature of the molten metal 3 supplied to the casting apparatus 4 are suppressed, The casting quality can be improved.

  In particular, in the melting and supplying method of the present embodiment, the metal material 2 is heated to a predetermined temperature and supplied to the melting furnace 7 in the metal material supplying step S100, so that the metal material supplied to the melting furnace 7 is heated in advance. Thus, the melting time of the metal material 2 in the melting furnace 7 can be further reduced.

  As described above, the method for dissolving and supplying the metal material 2 and the structure of the melting and supplying apparatus 1 according to the present embodiment are not limited to the above-described embodiments, and various modifications can be made without departing from the object of the present invention.

  That is, in the melting and supplying method of the above-described embodiment, when the metal material 2 is supplied to the melting furnace 7 in which a predetermined amount of the molten metal 3 is previously held, the molten metal 3 held in the melting furnace 7 is induced by induction heating. It is preferable to have a preheating step of heating and adjusting to a predetermined temperature. By controlling the temperature of the molten metal 3 held in the melting furnace 7 in this way, the melting time of the metal material 2 can be more effectively reduced.

  In particular, as shown in FIG. 4, when the melt supply cycle is repeatedly performed continuously, when the melt supply cycle is repeated from the molten metal supply step S120 to the metal material supply step S100, the preheating step S130 is performed. The molten metal 3 remaining in the melting furnace 7 is preferably heated to the melting temperature of the metal material 2 by induction heating immediately after the molten metal 3 is supplied to the casting apparatus 4 in the molten metal supply step S120. Thus, the melting time of the metal material 2 in the melting step S110 can be further reduced by starting heating immediately after the molten metal is supplied in the molten metal supply step S120.

  Further, in the melting and supplying method of the present embodiment, it is sufficient that at least the amount of the molten metal 3 required for one casting can be supplied by the casting apparatus 4 in the molten metal supplying step S120 and is held in the melting furnace 7 in advance. The amount of molten metal 3 (retention amount), the amount of molten metal 3 remaining in the melting furnace 7 in the molten metal supply step S120 (remaining amount), and the supply amount of the metal material 2 supplied in the metal material supply step S100, respectively. It can be changed to any amount. This is because it may be assumed that the amount of the molten metal 3 required for one casting in the casting apparatus 4 varies from casting to casting. That is, in the melting and supplying method of the above-described embodiment, the case where the retained amount and the remaining amount of the molten metal 3 in the melting furnace 7 are equal (see FIG. 3), but the retained amount and the remaining amount of the molten metal 3 are different. It may be adjusted as follows. Further, the supply amount of the metal material 2 by the supply device 6 may be adjusted so as to be different from the amount of the molten metal 3 required for one casting by the casting device 4.

  In the melting and supplying apparatus 1 of the above-described embodiment, the molten metal 3 is supplied into the cavity of the casting mold 40 via the injection sleeve as the casting apparatus 4. The supply process to the apparatus 4 is not limited to this. For example, the molten metal 3 held in the melting furnace 7 is once supplied to the ladle, and the molten metal 3 is put into the cavity of the casting mold 40 through the ladle. You may comprise so that it may supply.

  Moreover, in the melt | dissolution supply apparatus 1 of the Example mentioned above, although the structure of the supply apparatus 6 which supplies the ingot-shaped metal material 2 was demonstrated, the structure of this supply apparatus 6 is not limited to this, For example, a granular metal When the material 2 is used, the metal material 2 may be supplied to the melting furnace 7 with its own weight dropped by a hopper device holding the metal material 2.

  In particular, as shown in FIG. 5, when a deformed piece or iron scrap having a different shape or size is used as the metal material 2, the heating device provided in the supply device 106 is the above-described embodiment (FIG. 1). Unlike the configuration in which the metal material 2 is heated by radiant heating like the heater 62 of the reference), a hot air heating device 162 for heating the metal material 2 transported by the transport conveyor 161 to a predetermined temperature by hot air is provided. preferable. The hot air heating device 162 is configured to blow hot air of a predetermined temperature on the metal material 2 on the conveyor 161 from the vertical direction or the horizontal direction. In the embodiment shown in FIG. 5, the hot air heating device 162 is arranged below the transport conveyor 161 and is configured to blow and heat the metal material 2 from below to above the transport conveyor 161. As described above, by using the hot air heating device 162 as the heating device, even the metal materials 2 having different shapes and sizes can be efficiently heated. In addition, when comprised so that a hot air may be sprayed from the up-down direction of the conveyance conveyor 161, the conveyor by which the conveyance surface was formed in mesh shape is used as the conveyance conveyor 161. FIG.

DESCRIPTION OF SYMBOLS 1 Melting supply apparatus 2 Metal material 3 Molten metal 4 Casting apparatus 5 Housing 6 Supply apparatus 7 Melting furnace 8 Induction heating apparatus

Claims (4)

In the melting and supplying method of the metal material, the metal material is melted by induction heating and the melted metal material is supplied to the casting apparatus.
A preheating step of heating the molten metal of the melting furnace holding a predetermined amount of molten metal to a predetermined temperature by induction heating;
A metal material supplying step of heating and supplying the melting furnace holding the molten metal heated in the preheating step to a temperature at which only a predetermined amount of the metal material is not melted ;
The melting step of changing the state of the molten metal in the melting furnace in the preliminary heating step and heating to the melting temperature of the metal material, melting the metal material supplied to the melting furnace in the metal material supply step by induction heating,
A molten metal supply step for supplying a quantity of molten metal required for one casting in the casting apparatus, while leaving the molten metal in the melting furnace;
A method for dissolving and supplying a metal material, comprising:   The method for melting and supplying a metal material according to claim 1, wherein the preliminary heating step starts heating immediately after the molten metal is supplied in the molten metal supplying step. In a melting and supplying apparatus for a metal material that melts a metal material by induction heating and supplies the molten metal material to a casting apparatus,
A heating device for heating the metal material, and a supply device for heating and supplying the metal material to a temperature at which only a predetermined amount of the metal material is not dissolved by the heating device;
A melting furnace that is formed in a capacity capable of holding a larger amount of molten metal than the amount of molten metal required for one casting in the casting apparatus, and that contains a metal material supplied by the supply apparatus;
A predetermined amount of molten metal previously held in the melting furnace is heated to a predetermined temperature, and the state of the molten metal in the melting furnace is changed to be heated to the melting temperature of the metal material and supplied to the melting furnace by the supply device. An induction heating device for melting the metal material by induction heating,
The melting furnace is required for one casting in the casting apparatus while the molten metal remains in a state where a predetermined amount of the molten metal held in advance and a molten metal obtained by melting the metal material supplied from the supply apparatus are retained. An apparatus for melting and supplying a metal material, wherein the apparatus is tilted so as to supply an appropriate amount of molten metal.   The metal material melting and supplying apparatus according to claim 3, wherein the heating device is a hot air heating device that heats a metal material by blowing hot air at a predetermined temperature.

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