JP2003033860A - Molding method and molding equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a molding method and molding equipment which can easily shape molded goods consisting of a cast product, a portion of which is forged. SOLUTION: Molten metal and a reducing compound are made to contact each other in the first cavity part 39 and the second cavity part 43 which are cavities formed in a mold and, while an oxide film formed on the surface of the molten metal is being reduced, the molten metal is filled in the first cavity part 39 and the second cavity part 43. After that, the molten metal filled in the first cavity part 39 and the second cavity part 43 is made to solidify into a designated form of a solidified member, and then, a part of a solidified member formed in the first cavity part 36 is forged without taking-out the solidified member from the mold.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molding method and an apparatus therefor, and more specifically, to a part of a solidification member formed by solidifying a molten metal filled in a cavity of a molding die and removing the solidification member from the molding die. TECHNICAL FIELD The present invention relates to a forming method and an apparatus for performing forging without using.

[0002]

2. Description of the Related Art Conventionally, aluminum alloys have been used as casting materials for aluminum casting. As the aluminum alloy used as this casting material,
Al-Si type aluminum alloys are widely used. FIG. 6 shows a phase diagram of such an Al-Si based aluminum alloy. Among the Al-Si-based aluminum alloys shown in FIG. 6, the Al-Si-based casting aluminum alloy generally used as a casting material has a hatched portion shown in FIG.
Is contained in about 5-10%. Like this
The molten metal obtained by melting the Al-Si based aluminum alloy for casting containing Si in an amount of about 5 to 10% has a wide liquidus range α and a wide eutectic range (L + α) as shown in FIG. Good fluidity. Therefore, when the molten metal is poured into the molding die, the molten metal has a good circumference in the cavity, and sink marks or the like are less likely to occur in the obtained cast product. However, a cast product made of an Al-Si based aluminum alloy for casting is inferior in strength, toughness and the like to a forged product made from an Al-Cu based aluminum alloy for forging such as duralumin. On the other hand, in order to improve mechanical properties such as strength of conventional cast products, Al-C
It is conceivable to use a u-based aluminum alloy for forging in casting. However, as the Al—Cu based aluminum alloy for forging, a shaded portion in the state diagram shown in FIG. 7, that is, an Al—Cu based aluminum alloy containing about 2 to 5% of Cu is used. The molten metal obtained by melting the Al-Cu-based aluminum alloy for forging is Al-S.
Compared with the melt of the i-type aluminum alloy for casting, the liquid phase range α is narrow and the fluidity is low, so that even if the molten metal is poured into the forming die, the liquidity in the cavity is inferior. For this reason, sink marks and the like are likely to occur in the obtained cast product, and conventionally, the aluminum alloy for forging has not been used for casting.

Some aluminum products, for example, have a portion such as a cylinder portion which requires mechanical properties such as strength and toughness more than other portions. When manufacturing such an aluminum product, conventionally, the entire product is forged by using an aluminum alloy for forging that satisfies mechanical properties such as strength and toughness in accordance with a portion where mechanical properties are required. It is being appreciated. However, forging is more difficult to perform fine processing than casting. For this reason, only the part where the mechanical properties are particularly required is formed by forging using an aluminum alloy for forging, and the part where the mechanical properties such as strength are not particularly required and the part where the fine processing is required is cast. A forming method in which the aluminum alloy for use is formed by casting is conceivable.

[0004]

DISCLOSURE OF INVENTION Problems to be Solved by the Invention The inventors of the present invention have previously forged parts for which mechanical properties are required by using an aluminum alloy for forging into a forged part having a final shape, and then insert the forged part. An attempt was made on a molding method in which a molten aluminum alloy for casting was poured into the cavity of the molding die and cast.
According to such a forming method, it is possible to perform even fine processing that was difficult to process only by forging. However, according to this forming method, it has been found that when the molten metal is poured into the cavity of the forming die into which the forged part is inserted, the molten metal circumference is significantly reduced, and sink marks or the like are likely to occur in the cast portion. In addition, since the forged part that has been forged into the final shape in advance is inserted into the cavity of the molding die, the shape of the cavity of the molding die tends to be complicated. Then, the subject of this invention is providing the shaping | molding method and apparatus which can shape | mold easily the shaping | molding article which forges a cast cast article and shape | molds.

[0005]

Means for Solving the Problems The inventors of the present invention have conducted studies to solve the above-mentioned problems, and as a result, two of the inventors of the present invention have previously described in Japanese Patent Application No. 11-91445 in a cavity of a molding die. It was found that by bringing the reducing compound used in the aluminum casting method proposed in (1) into contact with the molten aluminum alloy for forging, the dipability of the molten metal in the cavity can be significantly improved. Further, a forging device is provided in the mold so that a part of the solidified member formed by solidifying the molten metal filled in the cavity of the mold can be forged without removing the solidified member from the mold. By
When the portion of the solidified member to be forged reaches the optimum temperature most suitable for forging, the portion of the solidified member can be forged,
I also learned that it is possible to easily forge a part of the solidified member. The present inventors have arrived at the present invention as a result of further studies based on such findings.

That is, according to the present invention, the molten metal and the reducing compound are brought into contact with each other in the cavity formed in the mold to reduce the oxide film formed on the surface of the molten metal while filling the cavity with the molten metal. After that, the molten metal filled in the cavity is solidified into a solidified member having a predetermined shape, and then,
A forming method is characterized in that a part of the solidified member is forged without removing the solidified member from the forming die. Further, the present invention is a molding apparatus provided with a molding die including a cavity in which an oxide film formed of a metal oxide formed on a surface thereof is brought into contact with a reducing compound and filled with a molten metal of a reduced metal. A forging device is provided in the mold so that a part of the solidified member formed by solidifying the molten metal filled in the cavity can be forged without removing the solidified member from the mold. It is also a molding device characterized by that.

In the present invention, as the molding die, a molding die having a cavity composed of a plurality of cavity portions to which the cooling speed difference of the filled molten metal is applied is used. By forging the solidified member formed by solidifying the molten metal filled in the cavity having the slowest cooling rate, the timing of forging the solidified member at a predetermined position can be easily controlled. As this mold, the cavity is composed of at least a first cavity portion and a second cavity portion, and the second cavity portion is provided with a forced cooling means so that the cooling rate is faster than that of the first cavity portion. Using a mold
By forging the solidified member formed in the first cavity portion, the cooling rate difference between the first cavity portion and the second cavity portion can be easily controlled, and the solidified member to be forged is formed in the first cavity. It is possible to easily control the temperature of the part. Further, as the molten metal to be poured into the cavity, it is preferable to use a molten metal made of aluminum for forging, and as the reducing compound, it is preferable to use a magnesium nitrogen compound obtained by reacting magnesium with nitrogen.

In the present invention, the molten metal and the reducing compound are brought into contact with each other in the cavity of the molding die to reduce the oxide film on the surface of the molten metal while filling the cavity with the molten metal. For this reason, the oxide film that reduces the fluidity of the molten metal is reduced and disappears, the fluidity of the molten metal can be increased, and the molten metal made of forging aluminum, which has lower fluidity than the molten metal made of casting aluminum, is used. Can be sufficiently filled in the cavity. Further, a forging device is provided in the molding die. Therefore, it is possible to perform forging on a part of the solidification member formed by solidifying the molten metal filled in the cavity of the molding die without removing the solidification member from the molding die, so that the solidification member can be reliably placed at a predetermined position. Forging can be performed easily and easily.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an example of a molding die constituting a molding apparatus according to the present invention. The mold 10 shown in FIG.
The lower mold part 12, the upper mold part 14, and the core part 1 which are made of metal
It consists of 6. The lower die part 12 is composed of a fixed part 18, a forging press part 21 and a forging receiving member 23, and each of the forging press part 21 and the forging receiving member 23 slides horizontally by a cylinder device 27, 29. It is possible. The forging receiving member 23 has a recess 2
3a is formed, and chamfers 21a and 21b are applied to the tip corner portion of the forging press portion 21. In addition, the upper mold part 14 placed on the lower mold part 12 includes the upper mold member 31a,
31b, each of the upper mold members 31a and 31b is provided so as to be slidable in the horizontal direction by the cylinder devices 33a and 33b. Further, the core part 16 is provided so as to be movable in the vertical direction by the cylinder device 35, and is inserted into the lower mold part 12 so that the core lower mold part 37a,
37b and a core upper mold part 37c inserted into the upper mold part 14
Composed of and.

When the core part 16 is inserted into the lower mold part 12 and the upper mold part 14, the inner wall surface of the fixing part 18 of the lower mold part 12 and the core lower part of the core part 16 facing the inner wall surface. Mold part 37
A first cavity portion 39 is formed by the outer peripheral surfaces of a and 37b. Each of the forging press portion 21 and the forging receiving member 23 forming the lower die portion 12 is retracted to the position where the tip end surface abuts the outer peripheral surface of the corresponding core lower die portion 37a, 37b. Further, the upper mold member 31 of the upper mold portion 14
The second cavity portion 43 is formed by the inner wall surfaces of a and 31b and the outer peripheral surface of the core upper mold portion 37c. The second cavity part 43 formed in the upper mold part 14 and the lower mold part 12
The first cavity portion 39 formed in the above is connected and integrated in the vicinity of the boundary between the lower mold portion 12 and the upper mold portion 14. The first cavity portion 39 and the second cavity portion 4
No coating agent or the like is applied to the inner wall surfaces of No. 3, and the metal surface of the member forming each cavity is exposed.

In the upper mold part 14 in which the second cavity part 43 is formed, a riser part 46 is provided between the second cavity part 43 and the receiving part 44 as a pouring port used for pouring molten metal. Are formed. The receiving part 44 and the feeder part 4
Reference numeral 6 is also an introduction path for introducing molten metal or the like into the second cavity portion 43. Further, in the upper mold members 31a, 31b near the inner wall surface of the second cavity portion 43, the cooling water passages 48, 48 ...
Are formed, and by passing the cooling water through the cooling water passages 48, 48, ..., It is possible to provide a heat insulation difference in which the second cavity portion 43 has a lower heat insulation than the riser portion 46, and the second cavity portion 43 The cooling rate of the molten metal filled in the
The cooling rate of the molten metal filled in No. 6 can be made faster.

To perform casting using the mold 10 shown in FIG. 1, first, the cylinder devices 27, 29, 33a and 33 are used.
b, 35 are driven to open the die for forging press section 2
1, receiving member 23 for forging, and upper mold members 31a, 31b
Is moved in the mold closing direction. The mold 10 shown in FIG.
Magnesium-nitrogen compounds as reducing compounds (Mg
₃ N ₂ ) is charged into the first cavity portion 39 and the second cavity portion 43 via the receiving portion 44 and the riser portion 46. Further, the molten metal is filled into the first cavity portion 39 and the second cavity portion 43 via the receiving portion 44 and the feeder portion 46, and the receiving portion 44 and the feeder portion 46 are also filled with the molten metal as shown in FIG. Fill. In this way, by allowing the reducing compound to exist in the first cavity portion 39 and the second cavity portion 43 in advance, the oxide film formed on the surface of the poured molten metal is reduced and the surface tension of the molten metal is reduced. To reduce. Therefore, it is possible to enhance the fluidity of the molten metal and the circumferential property of the molten metal without applying a coating agent or the like for improving the fluidity of the molten metal to the inner wall surfaces of the first cavity portion 39 and the second cavity portion 43. It is possible to significantly improve the smoothness of the surface of the obtained cast portion. Further, the fluidity of the molten metal is good, and the molten metal can be filled in the first cavity portion 39 and the second cavity portion 43 in a short time. Therefore, the cooling water passage 4 of the molding die 10
Cooling water is introduced into 8, 48 ...
The molten metal filled in can be rapidly cooled, and the productivity of casting can be significantly improved. Moreover, the second cavity portion 4
By rapidly cooling the molten metal filled in No. 3, fine crystals are likely to precipitate and the strength of the cast portion can be improved.
As the molten metal, an aluminum alloy for forging shown in FIG. 7, that is, Al—C containing about 2 to 5% of Cu.
A molten metal obtained by melting a u-based aluminum alloy is used.

When the molten metal filled in the second cavity 43 is cooled, a volume reduction occurs due to the solidification of the molten metal. If the volume reduction is left as it is, sink marks and the like are likely to occur in the cast portion. In this regard, in the mold 10 shown in FIGS. 1 and 2, the second cavity portion 43 forcibly cooled by the cooling water introduced into the cooling water passages 48, 48 ... It has low heat insulation. For this reason,
Compared with the cooling rate of the molten metal of the second cavity portion 43, the cooling rate of the molten metal of the feeder portion 46 which is natural cooling is slow. Therefore, even if the molten metal filled in the second cavity portion 43 is solidified, the molten metal filled in the feeder portion 46 still exhibits fluidity. Therefore, even if a gap is formed in the second cavity portion 43 due to the volume decrease accompanying the solidification of the filled molten metal, a part of the molten metal of the feeder portion 46 exhibiting fluidity is
It flows into the gap of the second cavity portion 43. As a result, it is possible to prevent the occurrence of sink marks and the like due to the solidification of the molten metal filled in the second cavity portion 43. In addition, the first cavity portion 3
9 is also cooled by natural cooling. Therefore, as shown in FIG. 3, the cooling rate of the molten metal filled in the first cavity portion 39 is slower than that of the molten metal filled in the second cavity portion 43 provided with the forced cooling means. Therefore, the molten metal filled in the first cavity portion 39 and the second cavity portion 4
It is possible to easily adjust the cooling rate difference with the molten metal filled in No. 3. In this way, by forging the solidified member in which the molten metal filled in the first cavity portion 39, which has a slower cooling rate than the molten metal filled in the second cavity portion 43, is solidified, the solidified member is forged. When the temperature of the portion to be subjected to the welding reaches the optimum condition, the forging can be performed immediately.

In this way, when the molten metal filled in the second cavity 43 is cooled and solidified, the cylinder device 35
Is driven to pull out the core portion 16 from the lower mold portion 12 and the upper mold portion 14, and then the cylinder device 29 is driven to move the forging receiving member 23 until the tip of the receiving member 23 contacts the fixing portion 18. . Forging receiving member 2 whose tip abuts the fixed portion 18
The concave portion 23a of No. 3 is located so as to cover the portion from which the core lower mold part 37b of the core part 16 has been removed. Next, as shown in FIG. 4, the cylinder device 27 is driven, and the tip of the forging press portion 21 presses the solidified member filled and solidified in the first cavity portion 39 into a predetermined shape.
During such press working, the upper mold member 31 of the upper mold portion 14
a and 31b maintain the mold closed state. Therefore, the pressed portion of the solidified member pressed by the press working enters the chamfers 21a and 21b of the forging press portion 21 and the recess 23a of the forging receiving member 23 and forms a part of a predetermined shape. After that, the cylinder devices 27, 29, 33a, 33b
Drive the forging press portion 21, the forging receiving member 23,
Also, the upper mold members 31a and 31b are moved to open the mold, and the molded product is taken out.

The mold 10 shown in FIGS. 1 to 4 has a reducing property.
Magnesium and nitrogen compounds as compounds (Mg₃N₂) The first
Although it was charged into the two-cavity part 43, the molding shown in FIG.
In the second cavity 43 of the molding die 10, as in the device,
Gnesium nitrogen compound (Mg₃N ₂) After producing the molten metal
May be poured. The molding apparatus shown in FIG.
A mold 10 having the same structure as the mold 10 shown in FIG.
ing. The receiving portion 44 of the mold 10 has a nitrogen gas
One end of the pipe 22 connected to the
By opening the valve 24 of the pipe 22,
Nitrogen gas is injected into the 2 cavity part 43,
The inside of the tee portion 43 is set to a nitrogen gas atmosphere, and a substantially non-oxygen atmosphere is used.
It can be an atmosphere. Also, argon gas cylinder 2
5 is a generator for generating a metal gas through the pipe 26
Installed in the pipe 26.
The valve 30 is opened to open the heating furnace 28.
You can inject Lgon gas. The inside of this heating furnace 28 is a heater
It is formed by 32 so that it can be heated.
Generating magnesium gas as a metal gas described later
Therefore, it is set to 800 ℃ or higher at which magnesium powder sublimes.
ing. Between the valve 30 of this pipe 26 and the heating furnace 28
Also, in order to keep the flow rate of the argon gas at the specified flow rate,
Argon gas injected into the heating furnace 28 by the valve 30
You can adjust the amount.

The argon gas cylinder 25 is connected to a tank 36 containing magnesium powder by a pipe 34 in which a valve 33 is interposed, and the tank 36 is connected by a pipe 38 to a pipe 26 downstream of the valve 30.
It is connected to the. A valve 40 is also installed in this pipe 38. The heating furnace 28 is provided with a molding die 1 via a pipe 42.
2 is connected to the metal gas inlet 12c, and the heating furnace 2
The metal gas gasified in 8 is received by the receiving portion 44 of the molding die 10.
Is introduced into the second cavity portion 43 via. A valve 45 is also provided in the pipe 42. When the argon gas is injected from the argon gas cylinder 25 into the second cavity portion 43 of the molding die 10 via the heating furnace 28, the amount of the argon gas injected into the second cavity portion 43 can be adjusted by the valve 45.

In the molding apparatus shown in FIG. 5, the molding die 10 is used.
When the magnesium nitrogen compound (Mg ₃ N ₂ ) is generated in the second cavity portion 43 of the above, first, the valve 24 is opened, and the mold 10 is opened from the nitrogen gas cylinder 20 through the pipe 22.
Nitrogen gas is injected into the second cavity 43, and the air in the second cavity 43 is purged with nitrogen gas. The inside of the second cavity 43 is made to be a nitrogen gas atmosphere and a substantially non-oxygen atmosphere, and then the valve 24 is once closed. While purging the air in the second cavity portion 43 of the molding die 10, the valve 30 is opened and argon gas is injected into the heating furnace 28 from the argon gas cylinder 25 so that the inside of the heating furnace 28 is in an oxygen-free state. And Next, the valve 30 is closed, the valve 40 is opened, and the magnesium powder in the tank 36 is sent into the heating furnace 28 together with the argon gas by the argon gas pressure. The heating furnace 28 includes a heater 32.
Due to this, the magnesium powder is heated to a furnace temperature of 800 ° C. or higher at which it sublimes. Therefore, the heating furnace 2
The magnesium powder sent to No. 8 sublimes into magnesium gas.

Next, the valve 40 is closed and the valves 30 and 45 are opened to adjust the pressure and flow rate of the argon gas, and the magnesium gas is passed through the pipe 42, the receiving portion 44 of the mold 10 and the riser portion 46. Is injected into the second cavity portion 43. After injecting magnesium gas into the second cavity part 43, the valve 45 is closed and the valve 24 is opened, and the nitrogen gas is introduced into the second cavity part 43 via the receiving part 44 and the feeder part 46 of the molding die 10. Inject. In this way, by injecting the nitrogen gas into the second cavity portion 43, the magnesium gas and the nitrogen gas are reacted in the second cavity portion 43 to generate the magnesium nitrogen compound (Mg ₃ N ₂ ). The magnesium nitrogen compound is deposited as powder on the inner wall surface of the second cavity 43. When the nitrogen gas is injected into the second cavity portion 43, the pressure and the flow rate of the nitrogen gas are appropriately adjusted. It is also preferable to preheat the nitrogen gas so that the nitrogen gas and the magnesium gas easily react with each other and to inject the nitrogen gas so that the temperature of the molding die 10 does not decrease. The reaction time may be about 5 seconds to 90 seconds (preferably about 15 seconds to 60 seconds). Even if the reaction time is longer than 90 seconds, the mold temperature of the mold 12 tends to decrease and the reactivity tends to decrease.

With the magnesium nitrogen compound adhered to the inner wall surface of the second cavity 43 of the molding die 10, a molten aluminum alloy for forging is poured from the receiving portion 44, and thereafter, as shown in FIGS. Molding is performed in the same order as the molding die 10. In the molding die 10 shown in FIGS. 1 to 5, the upper die member 3
Each of the second cavity portion 43 and the riser portion 46 is formed by conducting cooling water through cooling water passages 48, 48 formed in the vicinity of the inner wall surface of the second cavity portion 43 of 1a, 31b to force cooling. Although a large cooling speed difference is given to the molten metal filled in, the heat insulating coating material is applied to the inner wall surface of the riser portion 46 without conducting the cooling water to the cooling water passages 48, 48 ... Good. By applying such a heat insulating coating material,
The cooling rate of the molten metal in the feeder section 46 can be made significantly slower than the cooling rate of the molten metal in the second cavity section 43, and a large cooling rate difference can be provided between the two. The heat-insulating mold coating agent is used as the second cavity portion 43 when the mold is formed.
It is possible to use a coating agent having a high heat insulating property, for example, a coating agent in which ceramic is mixed, which is a coating agent applied to the inner wall surface and the like.

[0020]

According to the present invention, the fluidity of the molten metal can be increased by contacting with the reducing compound in the cavity, and the forging aluminum is lower in fluidity than the casting aluminum molten metal. Even if a molten metal is used, the cavity can be sufficiently filled. Further, since the forging device is provided in the forming die, forging is performed on a part of the solidifying member formed by solidifying the molten metal filled in the forming die cavity without removing the solidifying member from the forming die. As a result, forging can be performed reliably and easily at a predetermined portion of the solidified member, and as a result, according to the present invention, the molded product partially forged is placed in the cavity of the forming die. Compared to the case of inserting a forged member of a shape and casting,
It can be easily obtained, and the manufacturing cost of the mold can be reduced.

[Brief description of drawings]

FIG. 1 is a schematic sectional view for explaining an example of a molding die that constitutes a molding apparatus according to the present invention.

FIG. 2 is a schematic cross-sectional view for explaining a state where molten metal is poured into a cavity of the molding die shown in FIG.

FIG. 3 is an explanatory diagram for explaining a cooling rate difference between a first cavity portion not provided with a forced cooling means and a second cavity portion provided with a forced cooling means.

FIG. 4 is a schematic cross-sectional view for explaining a state in which a forging device is forged on a part of the solidified member which is formed by filling the cavity of the mold shown in FIG. .

FIG. 5 is a schematic view for explaining another example of the molding apparatus according to the present invention.

FIG. 6 is a state diagram of an Al—Si based aluminum alloy used as a casting material.

FIG. 7 is a phase diagram of an Al—Cu-based aluminum alloy used as a forging material.

[Explanation of symbols]

10 Mold 12 Lower mold part 14 Upper mold part 16 Core part 18 Fixed part 21 Forging press section 23 Forging receiving member 27, 29, 33a, 33b, 35 Cylinder device 31a, 31b Upper mold member 39 First cavity part 43 Second cavity part 44 Receiver 46 riser section 48 cooling channels

Front page continuation (51) Int.Cl. ⁷ Identification code FI theme code (reference) B22C 9/06 B22C 9/06 DH 9/22 9/22 Z B22D 21/04 B22D 21/04 A 27/04 27 / 04 G (72) Inventor Akira Sunohara 840 Kunibu, Ueda City, Nagano Nissin Kogyo Co., Ltd. (72) Inventor Koichi Ogiwara 840 Kazabu Kojibu, Ueda, Nagano Nissin Kogyo Co., Ltd. F-term (reference) 4E087 AA04 AA05 BA04 BA20 BA22 CA13 CB01 DB12 DB22 EC02 EC11 ED16 GA09 HA64 4E093 NA10 NB01 NB05 NB10 TA10

Claims (8)

[Claims] 1. The cavity is formed by bringing the molten metal and a reducing compound into contact with each other in a cavity formed in a mold to reduce the oxide film formed on the surface of the molten metal and filling the cavity with the molten metal. A molding method, wherein the molten metal filled in is solidified into a solidified member having a predetermined shape, and then a part of the solidified member is forged without removing the solidified member from the mold. 2. A molding die having a cavity composed of a plurality of cavity portions to which a difference in cooling rate of the filled molten metal is applied, as the molding die, and the cooling rate of the plurality of cavity portions is used. The molding method according to claim 1, wherein the solidified member formed by solidifying the molten metal filled in the slowest cavity of the mold is forged. 3. The molding die has a cavity composed of at least a first cavity portion and a second cavity portion, and the second cavity portion has a cooling rate faster than that of the first cavity portion. The molding method according to claim 1 or 2, wherein the solidification member formed in the first cavity portion is forged by using a molding die in which a forced cooling unit is provided. 4. The molding method according to claim 1, wherein a molten metal made of aluminum for forging is used as the molten metal. 5. The molding method according to claim 1, wherein a magnesium nitrogen compound obtained by reacting magnesium and nitrogen is used as the reducing compound. 6. A molding apparatus provided with a molding die having a cavity in which an oxide film formed of a metal oxide formed on a surface thereof is brought into contact with a reducing compound and filled with a molten metal of reduced metal. A forging device is provided in the mold so that a part of the solidified member formed by solidifying the molten metal filled in the cavity can be forged without removing the solidified member from the mold. Molding device characterized by being 7. The mold cavity is composed of a plurality of cavity parts to which a difference in cooling rate of the filled molten metal is applied, and the cavity part having the slowest cooling rate among the plurality of cavity parts is filled. 7. The forming apparatus according to claim 6, wherein a forging device is provided so that the solidified member formed by solidifying the molten metal is forged. 8. The mold cavity comprises at least a first cavity.
It is composed of a cavity portion and a second cavity portion, and the second cavity portion is provided with a forced cooling means so that the cooling rate is higher than that of the first cavity portion, and is formed in the first cavity portion. The forming apparatus according to claim 6 or 7, wherein a forging device is provided so that the solidified member thus forged is forged.