JP2002144019A - Unidirectional solidified casting method and apparatus therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and an apparatus for unidirectional solidified casting with which even in the case of being a complicated mold shape and casting plural cast products at one time of casting, the development of a single crystal, etc. can be produced by making large of the temperature gradient in the unidirectional solidified direction and making small of the temperature gradient in the orthogonal direction to the above direction. SOLUTION: The heating of a base plate is prevented by arranging a water-cooling copper plate on the base plate. Further, when the mold is drawn out from a heating furnace, the position of the water-cooling copper plate to the heating furnace is not made to shift while the water-cooling copper plate is not interfered with the projecting part, etc., of the mold. Then, a copper column projected to the cooling plate is exposed on the base plate. Further, when the mold is drawn out from the heating furnace, a heat-radiation preventive plate and the water-cooling plate are made to the inserting state into a space part at the inside of the mold while these plates are not interfered with the projecting part, etc., of the mold. Furthermore, the water-cooling plate is divided into plural pieces and each divided plate can independently be inserted into the space part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a unidirectional solidification casting method and apparatus.

[0002]

2. Description of the Related Art As a method for producing a unidirectionally solidified cast product and a single crystal precision cast product, a unidirectionally solidified casting method also called a Bridgman method is employed. This one-way solidification casting method is a method in which a melt poured into a mold is solidified in one direction to grow crystals in one direction (form a one-way solidified structure).

FIG. 11 is a cross-sectional view showing the configuration of a conventional one-way solidification casting apparatus, FIG. 12 is a cross-sectional view showing a state during the one-way solidification process by the one-way solidification casting apparatus, and FIG. It is a principal part enlarged plan view of the A line arrow.

As shown in FIG. 11, a heating furnace 2 is provided in a vacuum chamber 1. At the upper part and the lower part of the heating furnace 2, a heat radiation preventing plate 6a and a heat radiation preventing plate 6b are provided, respectively. These radiation prevention plates 6a and 6b prevent the heat in the heating furnace 2 from being released outside the furnace. The heat radiation prevention plates 6a and 6b have openings 6a-1 and 6b, respectively.
-1 is provided. The upper opening 6a-1 can be opened and closed by the heat insulating material 7.

A plurality of radiant heat bodies 8 are supported on the inner surface of the heating furnace 2. At the start of the one-way solidification process (at the time of injection of molten metal), four investment casting molds 10 made of a ceramic material are accommodated in the heating furnace 2 (see FIG. 13). Each of these four molds 10 is for casting a moving blade of a gas turbine, and has a space 12 inside and is arranged on a cooling plate 11 so as to have a constant interval in the circumferential direction. (See FIG. 13). In the illustrated example, the four molds 10 are
And coaxially with respect to the central axis of the cooling plate 11 and the like. In FIG. 11, only two molds 10 facing each other in the diameter direction of the cooling plate 11 are shown in consideration of the visibility of the drawing.

[0006] The cooling plate 11 is made of copper formed in a disk shape, and the cooling water supplied from a cooling water supply device (not shown) flows through the inside thereof as indicated by an arrow K.

The upper end of each of the four molds 10 has a runner 13
Are connected to a common gate 14. On the other hand, the lower end of the mold 10 is open so that the lower end of the molten metal 16 injected into the mold 10 directly contacts the surface of the cooling plate 11. Other parts of the surface of the cooling plate 11 (parts other than in contact with the molten metal)
It is covered by a base rate 15 supporting 0.
The base rate 15 is a part of the mold and is made of the same ceramic material as the mold 10. The base plate 15 and the cooling plate 11 are provided with a radiation preventing plate 6b.
, That is, outside the heating furnace 2.

An elevating shaft 17 is connected to the lower surface of the cooling plate 11. By moving the cooling plate 11 up and down together with the elevating shaft 17 by an elevating driving device (not shown) (see arrows B and C), heating is performed. The mold 10 can be moved in and out of the furnace 2 in the vertical direction. At the lower end of the heating furnace 2,
Cooling ring 1 so as to surround cooling plate 11
8 are provided. Although not shown, the cooling water supplied from the cooling water supply device also flows through the cooling ring 18. In the lower part of the vacuum chamber 1, a partition valve 20 for separating the inside and the outside of the vacuum chamber 1 is provided.
Is provided.

When casting a rotor blade of a gas turbine by such a one-way solidification casting apparatus, first, heat is applied from a radiant heat body 8 while the mold 10 is housed in the heating furnace 2 as shown in FIG. The radiation heats the mold 10 to a temperature above the melting point of the casting material. This is to prevent the molten metal 16 from cooling and solidifying during injection.
After the molds 10 are heated, the molten metal 16 that has been heated and melted in the melting furnace 21 is poured into each of the molds 10 from the gate 14 through the runner 13.

After the molten metal is injected, the cooling plate 11 is lowered while controlling the cooling plate 11 together with the elevating shaft 17 (see arrow B) as shown in FIG. Through the opening 6b-1. As a result, the molten metal 16 in the mold 10 is cooled by the cooling plate 11 or the cooling ring 1.
As a result of cooling to a temperature lower than the solidus temperature in order from the lower end side by heat radiation to the solid 8, solidification occurs in one direction from the lower end to the upper end. Thus, the moving blade of the gas turbine is cast, and the moving blade of the gas turbine cast in this way has excellent heat resistance and the like.

[0011]

However, in the above-mentioned conventional method, the shape of the mold (the shape of the cast product) becomes complicated, and
With the adoption of the method of manufacturing multiple products in one casting,
Tissue defects called heterocrystals and freckles are likely to occur,
There is a problem that the yield is reduced. The causes are as follows.

Since the mold shape is complicated and a plurality of molds are installed, the lower heat dissipation prevention plate 6b is made too large in order to prevent interference with obstacles such as the protrusions 10a of the mold 10 when the mold is pulled out. (Opening 6b-
1 needs to be increased). Therefore, the radiant heat from the radiant heat body 8 in the heating furnace 2 also heats the base plate 15 of the mold 10 to a high temperature, so that the temperature of the molten metal 16 in the mold 10 does not easily decrease.

Further, as shown in FIG. 13 by a dotted line, the state of heat radiation is indicated by a dotted line, and a mold 10 provided in an annular shape on the periphery of a disk-shaped cooling plate 11 only transfers their heat energy outward. There is a problem that the radiation is emitted to the wall of the vacuum chamber 1. That is, the heat energy released inward from each mold 10 at least partially collides with another mold 10 to heat that mold 10 and, moreover, is released from each mold 10. Heat energy is reflected between the molds many times in the space 12 inside the mold (since heat is stored in the space 12).
In addition to the temperature gradient in the vertical direction (unidirectional solidification direction), the temperature gradient in the horizontal direction is relatively steep, that is, the direction perpendicular to the vertical direction (unidirectional solidification direction). Temperature gradient occurs.

Further, as shown by a dotted arrow in FIG. 12, the heat energy radiated from the radiant body 8 in the heating furnace 2 causes the gap between the mold 10 and the gap between the runners 13. Since it passes through the space 12 inside the mold and is absorbed by the inner surface of the mold 10, the inner surface of the mold 10 is heated even in a region that has already been drawn out of the heating furnace 2 and solidified, thereby deteriorating the cooling effect. . This is particularly noticeable when manufacturing long castings, such as long blades of gas turbines.

[0015] Therefore, in view of the above problems, the present invention complicates the shape of a mold (the shape of a cast product), and increases the temperature gradient in the direction of unidirectional solidification even when a plurality of products are cast by one casting. Further, it is an object of the present invention to provide a unidirectional solidification casting method and apparatus capable of improving the yield by reducing the temperature gradient in a direction perpendicular to the direction and preventing the occurrence of foreign crystals and structural defects. And

[0016]

Means for Solving the Problems A first method for solving the above problems is described below.
According to the directional solidification casting method of the present invention, after a mold provided on a cooling plate is heated in a heating furnace, a molten metal is poured into the mold, and then the mold together with the cooling plate is moved relative to the heating furnace. In the one-way solidification casting method in which the molten metal in the mold is pulled out of the heating furnace and solidified in one direction, a liquid cooling member is provided on the base plate supporting the mold, and the liquid cooling member It is characterized by preventing heating.

[0017] The directional solidification casting apparatus according to a second aspect of the present invention includes:
After heating the mold disposed on the cooling plate in the heating furnace, the molten metal is poured into the mold, and then, the mold together with the cooling plate is moved relatively to the heating furnace, thereby heating the mold. A liquid cooling member is provided on a base plate supporting a mold, and a liquid cooling member is provided to prevent the base plate from being heated by a one-way solidification casting apparatus configured to solidify the molten metal in the mold in one direction by drawing the molten metal from the mold. It is characterized by having comprised in.

[0018] Further, the directional solidification casting method according to a third aspect of the present invention comprises:
After heating a plurality of molds disposed on the cooling plate in a heating furnace with a space inside and having a predetermined interval in the circumferential direction, a molten metal is poured into these molds, Thereafter, by moving the mold together with the cooling plate relative to the heating furnace, in the one-way solidification casting method of drawing out of the heating furnace and solidifying the molten metal in the mold in one direction, at least in the space inside the mold. Is
A liquid cooling member is provided on a base plate supporting a mold.

[0019] The directional solidification casting apparatus according to a fourth aspect of the present invention includes:
After heating a plurality of molds disposed on the cooling plate in a heating furnace with a space inside and having a predetermined interval in the circumferential direction, a molten metal is poured into these molds, Then, by moving the mold together with the cooling plate relative to the heating furnace, in a one-way solidification casting apparatus configured to draw out of the heating furnace and solidify the molten metal in the mold in one direction, at least the inside of the mold Is characterized in that a liquid cooling member is provided on a base plate supporting a mold.

In addition, a fifth invention of the directional solidification casting method comprises:
In the directional solidification casting method of the third invention, the liquid cooling member is relatively movable with respect to the mold, and when the mold is pulled out of the heating furnace, the position of the liquid cooling member with respect to the heating furnace is adjusted by the liquid cooling member. It is characterized in that it is not moved while it does not interfere with an obstacle such as a projection.

In addition, a directional solidification casting apparatus according to a sixth aspect of the present invention includes:
In the directional solidification casting apparatus according to the fourth aspect of the invention, the liquid cooling member is relatively movable with respect to the mold, and when the mold is pulled out of the heating furnace, the position of the liquid cooling member with respect to the heating furnace is adjusted by the liquid cooling member. It does not move while not interfering with an obstacle such as a projection.

The directional solidification casting method according to a seventh aspect of the present invention is characterized in that:
After heating the mold disposed on the cooling plate in the heating furnace, the molten metal is poured into the mold, and then, the mold together with the cooling plate is moved relatively to the heating furnace, thereby heating the mold. In the one-way solidification casting method in which the molten metal in the mold is drawn out of the mold and solidified in one direction, the heat transfer member protruding from the surface of the cooling plate is exposed on the base plate through the base plate supporting the mold. Features.

The directional solidification casting apparatus according to an eighth aspect of the present invention includes:
After heating the mold disposed on the cooling plate in the heating furnace, the molten metal is poured into the mold, and then, the mold together with the cooling plate is moved relatively to the heating furnace, thereby heating the mold. In a one-way solidification casting device configured to solidify the molten metal in the mold in one direction by pulling out the heat transfer member protruding from the surface of the cooling plate, passing through the base plate that supports the mold, on the base plate It is characterized in that it is configured to be exposed.

Further, a directional solidification casting method according to a ninth aspect of the present invention comprises:
After heating a plurality of molds disposed on the cooling plate in a heating furnace with a space inside and having a predetermined interval in the circumferential direction, a molten metal is poured into these molds, Thereafter, by moving the mold together with the cooling plate relative to the heating furnace, in the one-way solidification casting method of drawing out of the heating furnace and solidifying the molten metal in the mold in one direction, at least in the space inside the mold. Is
The heat transfer member protruding from the surface of the cooling plate is exposed to the space through the base plate supporting the mold.

A directional solidification casting apparatus according to a tenth aspect of the present invention is directed to a unidirectional solidification casting apparatus, comprising: After heating in the mold, the molten metal is poured into these molds, and then the mold together with the cooling plate is moved relative to the heating furnace, so that the molten metal in the mold is drawn out of the heating furnace in one direction. In the one-way solidification casting apparatus configured to solidify, at least in the space inside the mold, the heat transfer member projecting from the surface of the cooling plate is exposed to the space through the base plate supporting the mold. It is characterized by having such a configuration.

The directional solidification casting method according to the eleventh aspect of the present invention is directed to a method for heating a plurality of molds disposed on a cooling plate so as to have a space inside and at a predetermined interval in a circumferential direction thereof by using a heating furnace. After heating in the mold, the molten metal is poured into these molds, and then the mold together with the cooling plate is moved relative to the heating furnace, so that the molten metal in the mold is drawn out of the heating furnace in one direction. In the one-way solidification casting method of solidifying, a heat dissipation prevention plate is provided so that it can be inserted into the space inside the mold through the gap between the molds, and when the mold is pulled out from the heating furnace, the heat dissipation prevention plate is used as a protrusion on the mold. It is characterized in that it is inserted into the space inside the mold as long as it does not interfere with the obstacle.

In a twelfth aspect of the present invention, there is provided a unidirectional solidification casting apparatus, comprising: a plurality of molds provided on a cooling plate having a space inside and at a predetermined interval in a circumferential direction thereof; After heating in the mold, the molten metal is poured into these molds, and then the mold together with the cooling plate is moved relative to the heating furnace, so that the molten metal in the mold is drawn out of the heating furnace in one direction. In the one-way solidification casting apparatus configured to be solidified, a heat radiation prevention plate is provided so that it can be inserted into the space inside the mold through the gap between the molds, and when the mold is pulled out from the heating furnace, the heat radiation prevention plate is molded. As long as it does not interfere with an obstruction such as a projection, the insert is inserted into the space inside the mold.

The thirteenth aspect of the present invention relates to a unidirectional solidification casting method, wherein a plurality of molds having a space inside and a predetermined interval in a circumferential direction on a cooling plate are heated by a heating furnace. After heating in the mold, the molten metal is poured into these molds, and then the mold together with the cooling plate is moved relative to the heating furnace, so that the molten metal in the mold is drawn out of the heating furnace in one direction. In the one-way solidification casting method of solidifying, a liquid cooling plate is provided so that it can be inserted into the space inside the mold through the gap between the molds, and when the mold is pulled out from the heating furnace, the liquid cooling plate is used as a protrusion on the mold. It is characterized in that it is inserted into the space inside the mold as long as it does not interfere with the obstacle.

A directional solidification casting apparatus according to a fourteenth aspect of the present invention relates to a unidirectional solidification casting apparatus, comprising: After heating in the mold, the molten metal is poured into these molds, and then the mold together with the cooling plate is moved relative to the heating furnace, so that the molten metal in the mold is drawn out of the heating furnace in one direction. In the unidirectional solidification casting apparatus configured to solidify, a liquid cooling plate is provided so that it can be inserted into the space inside the mold through the gap between the molds, and when the mold is pulled out from the heating furnace, the liquid cooling plate is molded. As long as it does not interfere with an obstruction such as a projection, the insert is inserted into the space inside the mold.

A fifteenth aspect of the present invention provides the directional solidification casting method according to the thirteenth aspect, wherein the liquid cooling plate is divided into a plurality of parts in the drawing direction of the mold, and each of the liquid cooling plates is It is characterized in that it can be inserted independently into the space inside the mold through the gap between the molds.

A sixteenth aspect of the present invention is directed to the directional solidification casting apparatus according to the fourteenth aspect, wherein the liquid cooling plate is divided into a plurality in the drawing direction of the mold, and each of the liquid cooling plates is It is characterized in that it can be inserted into the space inside the mold independently through the gap between the molds.

[0032]

Embodiments of the present invention will be described below in detail with reference to the drawings.

<Embodiment 1> FIG. 1 is a cross-sectional view showing a configuration of a one-way solidification casting apparatus according to Embodiment 1 of the present invention, and FIG. 2 is an enlarged plan view of an essential part taken along line DD in FIG. FIG. In the drawings, the same parts as those in the related art (FIGS. 11 to 13) are denoted by the same reference numerals, and overlapping detailed description will be omitted.

As shown in FIGS. 1 and 2, in the directional solidification casting apparatus according to the first embodiment, water-cooled copper plates 31 and 3 are provided as liquid cooling members on a base plate 15 supporting a mold 10.
2 are provided. The water-cooled copper plate 31 is provided in the space 12 inside the mold 10, and the water-cooled copper plate 32 is
Is provided around.

The water-cooled copper plate 31 is a disk-shaped member made of copper.
The water-cooled copper plate 32 is a ring-shaped member made of copper, and although not shown, cooling water flows inside each of them. Water-cooled copper plate 31,
For example, a part of the cooling water flowing through the cooling plate 11 is supplied to the base plate 32 through a through hole (not shown) of the base plate 15.

The shape of the water-cooled copper plate 31 is not limited to a disk, but may be any shape.
The shape of 2 is not limited to a ring shape, but may be divided into a plurality of shapes. The liquid cooling member provided on the base plate 15 is not necessarily limited to a water-cooled copper plate, and is not shown. For example, by providing a copper tube in an appropriate shape such as a spiral shape, a cooling Water may be allowed to flow. Further, the cooling liquid is not necessarily limited to water, but may be another liquid (eg, oil).

As described above, according to the first embodiment,
Since the liquid cooling members such as the water-cooled copper plates 31 and 32 and the copper tube are provided on the base plate 15, the radiant heat body 8 in the heating furnace 2 is provided.
The base plate 15 can be prevented from being heated to a high temperature by heat radiation from the base plate 15. At this time, the temperature of the base plate 15 is always 100
It is kept below ℃. For this reason, the conventional (base plate 1)
The temperature of the molten metal 16 in the mold 10 is more likely to drop than in the case where the temperature of the molten metal 16 is increased by heating.

Therefore, since the molten metal 16 in the mold 10 is cooled more rapidly than in the prior art, the temperature gradient in the vertical direction (unidirectional solidification direction) becomes large and the horizontal direction (perpendicular to the unidirectional solidification direction). Direction), the temperature gradient becomes smaller,
It is possible to reduce the occurrence of foreign crystals and structural defects (freckles), thereby improving the yield.

Although the case where a plurality of castings are manufactured at the same time has been described above, the present invention is not limited to this case. This is also effective in the case of manufacturing a single cast product.

When a water-cooled copper plate was used without supplying cooling water, the water-cooled copper plate was melted by radiant heat, and a cooling effect was not obtained. Although a metal plate other than copper was also used, copper has a very high thermal conductivity.
The temperature of the base plate 15 could be reduced most when using No. 1 and No. 32.

In the above description, the liquid cooling member (water-cooled copper plate 32) is also provided around the mold 10 in order to further enhance the cooling effect, but the invention is not necessarily limited to this. A liquid cooling member (water-cooled copper plate 31) may be provided on the base plate 15 at least in the space 12 inside the mold, which has a particularly large influence.

<Embodiment 2> FIG. 3 is a sectional view showing a configuration of a unidirectional solidification casting apparatus according to Embodiment 2 of the present invention. In the drawings, the same parts as those in the conventional example (FIGS. 11 to 13) and the first embodiment (FIGS. 1 and 2) are denoted by the same reference numerals, and overlapping detailed description will be omitted.

As shown in FIG. 3, in the directional solidification casting apparatus according to the second embodiment, a water-cooled copper plate 31 is connected to an elevating shaft 41. The elevating shaft 41 is slidable in the vertical direction through the cooling plate 11 and the base plate 15. Accordingly, the water-cooled copper plate 41 can be relatively moved with respect to the mold 10 (cooling plate 15) by lifting and lowering the water-cooled copper plate 31 together with the lifting shaft 41 by a lifting drive device (not shown).

The elevating shaft 17 (cooling plate 11)
Is moved downward (in the direction of arrow B), and the mold 10 is
When pulling out from the upper side, lift shaft 41 upward (direction of arrow C)
The position of the water-cooled copper plate 31 with respect to the heating furnace 10 is prevented from moving while the water-cooled copper plate 31 does not interfere with an obstacle such as the protrusion (horizontally projecting portion) 10 a of the mold 10.

As described above, according to the second embodiment, the water-cooled copper plate 31 can be relatively moved with respect to the mold 10, and when the mold 10 is pulled out from the heating furnace 2, the position of the water-cooled copper plate 31 with respect to the heating furnace 2 is adjusted. Is not moved while the water-cooled copper plate 31 does not interfere with the obstacles such as the protrusions 10a of the mold 10, so that the state of heat radiation is shown in FIG. The radiated heat energy is shielded by the water-cooled copper plate 31, and the heat energy is radiated from the inner surface of the mold 10 to the water-cooled copper plate 31.

Therefore, the temperature gradient in the vertical direction (unidirectional solidification direction) is larger than that in the first embodiment, and the horizontal direction (direction orthogonal to the unidirectional solidification direction).
, The temperature gradient is reduced, so that the occurrence of foreign crystals and structural defects can be further reduced, and the yield is further improved.

<Embodiment 3> FIG. 4 is a cross-sectional view showing a configuration of a unidirectional solidification casting apparatus according to an embodiment of the present invention (a state during the unidirectional solidification process), and FIG.
It is a principal part enlarged plan view of the E line arrow. In the drawings, the same parts as those in the related art (FIGS. 11 to 13) are denoted by the same reference numerals, and overlapping detailed description will be omitted.

As shown in FIGS. 4 and 5, in the directional solidification casting apparatus according to the third embodiment, a large number of copper columns 51 as heat transfer members are protruded from the surface of the cooling plate 11.
These copper pillars 51 are copper cylindrical members, and the mold 10
Is exposed to the space 12 inside the mold 10 and the periphery of the mold 10 through the base plate 15 that supports.

Therefore, according to the third embodiment, since the heat energy in the space 12 inside the mold and the periphery of the mold 10 is transmitted to the cooling plate 11 via the copper pillar 51, the temperature of the base plate 15 is always maintained. It is kept below 500 ° C.
Therefore, the temperature of the molten metal 16 in the mold 10 is more likely to be lower than in the conventional case (when the base plate 15 is heated to a high temperature).

Therefore, since the molten metal 16 in the mold 10 is cooled more rapidly than in the prior art, the temperature gradient in the vertical direction (unidirectional solidification direction) becomes large and the horizontal direction (perpendicular to the unidirectional solidification direction). Direction), the temperature gradient becomes smaller,
Since the occurrence of heterocrystals and structural defects (freckles) can be reduced, the yield is improved.

Although the case where a plurality of castings are manufactured at the same time has been described above, the present invention is not limited to this, and the method of exposing the copper pillar as described above manufactures one casting having a complicated shape. It is also effective in such cases.

Further, as compared with the case where the metal columns of other materials are used, the use of the copper columns 51 makes the base plate 15
Was able to reduce the temperature.

In the above description, the copper pillars 51 are also exposed at the periphery of the mold 10 in order to further enhance the cooling effect, but the invention is not necessarily limited to this. It is sufficient that the copper pillar 51 is exposed at least in the space 12 inside the mold, which has a particularly large influence.

<Fourth Embodiment> FIG. 6 is a cross-sectional view showing a configuration of a one-way solidification casting apparatus according to a fourth embodiment of the present invention. FIG. FIG. 8 is a cross-sectional view showing a state immediately before the end of the one-way solidification process by the one-way solidification casting apparatus, FIG. 9 is an enlarged plan view of a main part as viewed in the direction of arrow F in FIG.
FIG. 10 is an enlarged plan view of an essential part taken along line GG in FIG. In the drawings, the same parts as those in the related art (FIGS. 11 to 13) are denoted by the same reference numerals, and overlapping detailed description will be omitted.

As shown in FIG. 6, in the directional solidification casting apparatus according to the fourth embodiment, a sliding control device 61 is provided at the lower end of the outer peripheral surface of the heating furnace 2. The device 61 includes a movable heat radiation preventing plate 62 and a movable water cooling plate 63.
And is equipped with. The heat radiation preventing plate 62 and the water cooling plate 63 are arranged in four sets in the circumferential direction corresponding to the mutual gaps at four places in the circumferential direction of the mold 10.

The heat radiation prevention plate 62 is located below the heat radiation prevention plate 6 b fixed to the heating furnace 2, and the water cooling plate 63 is located below the heat radiation prevention plate 62. The heat radiation prevention plate 62 slidably penetrates the water cooling ring 18 in the direction of arrow H, and can be inserted into the space 12 inside the mold 10 through the gap between the molds 10. The water cooling plate 63 also slidably penetrates the water cooling ring 18 in the direction of arrow H, and can be inserted into the space 12 inside the mold 10 through the gap between the molds 10. As shown in FIG. 10, the heat dissipation prevention plate 62 is wider than the water cooling plate 63 in order to perform heat shielding as effectively as possible.

The water cooling plate 63 is divided into a plurality (five in the illustrated example) in the drawing direction (vertical direction) of the mold 10. These liquid cooling plates 63a, 63b, 63c, 63
d and 63e are made of copper.
It is configured such that it can be inserted into the space 12 inside the mold through the mutual gap of zero. In addition, the water cooling plates 63a, 63b, 63
Cooling water supplied from a cooling water supply device (not shown) flows through c, 63d, and 63e.

Then, the heat radiation preventing plate 62 and the water cooling plate 63a,
63b, 63c, 63d and 63e are driven and controlled by the slide control device 62 when the mold 10 is pulled out of the heating furnace 2, so that the heat radiation preventing plate 62 and the water cooling plates 63a and 63e are controlled.
3b, 63c, 63d, 63e are the protrusions 10 of the mold 10.
The space 12 inside the mold as long as it does not interfere with obstacles such as
It is configured to be inserted into the. That is, the heat radiation preventing plate 62 and the water cooling plates 63a, 63b, 63 are prevented from interfering with obstacles such as the protrusions 10a of the mold 10.
Insert c, 63d and 63e into the space 12 inside the mold.

For example, in the state during the one-way solidification process shown in FIGS. 7, 9 and 10, the heat radiation preventing plate 63 and the water cooling plates 63a, 63b, 63c are inserted into the space 12 inside the mold, and the other water cooling The plates 63d and 63e are on standby outside the mold 10. When the mold 10 is further pulled out of this state, the heat radiation preventing plate 63 and the water cooling plates 63a, 63b, 63c are sequentially retracted to the outside of the mold 10 in order to avoid interference with the projection 10a of the mold 10, and conversely. , Water cooling plate 63
d and 63e are sequentially inserted into the space 12 inside the mold.
In the state immediately before the end of the one-way solidification process shown in FIG. 8, the heat radiation prevention plate 62 and the water cooling plates 63a, 63c, 63d that interfere with the runner 13 and the projection 10a of the mold 10 are attached to the mold 1.
The water cooling plates 63b, 63e are inserted into the space 12 inside the mold.

As described above, according to the fourth embodiment,
A heat radiation prevention plate 62 is provided so as to be inserted into the space 12 inside the mold through the gap between the molds 10, and the mold 10 is
When the heat radiation preventing plate 62 is inserted into the space 12 inside the mold 10 while not interfering with the obstacle 10 such as the protrusion 10a of the mold 10, the state of heat radiation is shown by a dotted line in FIG. As shown by the arrows, the heat energy radiated from the radiant heat body 8 is shielded by the radiation prevention plate 62.

For this reason, the temperature gradient in the vertical direction (unidirectional solidification direction) becomes larger and the temperature gradient in the horizontal direction (direction perpendicular to the unidirectional solidification direction) becomes smaller than in the prior art, so that foreign crystals or structural defects are formed. Can be reduced, and the yield is improved. Also, the quality of the casting is improved. That is, it also contributes to improving the microstructure, for example, reducing the interval between dendrites, preventing the formation of inappropriate crystal grains, reducing segregation, and reducing the porosity of the casting.

Further, a water cooling plate 63 is provided so as to be inserted into the space 12 inside the mold through the gap between the molds 10, and when the mold 10 is pulled out from the heating furnace 2, the water cooling plate 63 is
As long as it does not interfere with the obstacles such as the projections 10a, it is inserted into the space 12 inside the mold so that the state of heat radiation is shown in FIGS. The water cooling plate 63 (FIG. 7 shows the water cooling plate 63
a, 63b, 63c), heat energy is radiated from the inner surface of the mold 10. That is, not only heat radiation from the outer surface of the mold 10 but also heat radiation from the inner surface of the mold 10 are possible.

Therefore, the temperature gradient in the vertical direction (unidirectional solidification direction) is further increased as compared with the case where only the heat radiation prevention plate 62 is provided, and the temperature in the horizontal direction (direction orthogonal to the unidirectional solidification direction) is increased. Since the gradient is reduced, the occurrence of foreign crystals and structural defects can be further reduced, and the yield is further improved.

The liquid cooling plate 63 is divided into a plurality in the drawing direction of the mold, and these liquid cooling plates 63a, 63b,
63c, 63d and 63e can be inserted into the space 12 inside the mold independently through the mutual gap of the mold 10, so that the cooling effect of the water-cooled plate can be further enhanced.

For this reason, the temperature gradient in the vertical direction (unidirectional solidification direction) is further increased as compared with the case where the water cooling plate is integrated, and the temperature gradient in the horizontal direction (direction orthogonal to the unidirectional solidification direction) is further increased. , The generation of foreign crystals and structural defects can be further reduced, and the yield is further improved.

[0066]

As described above, the directional solidification casting method according to the first aspect of the present invention has been described in detail with the embodiments of the invention.
After heating the mold disposed on the cooling plate in the heating furnace, the molten metal is poured into the mold, and then, the mold together with the cooling plate is moved relatively to the heating furnace, thereby heating the mold. In a one-way solidification casting method in which the molten metal in the mold is drawn out of the mold in one direction, a liquid cooling member is provided on a base plate supporting the mold, and the liquid cooling member prevents heating of the base plate. .

The directional solidification casting apparatus according to the second aspect of the present invention
After heating the mold disposed on the cooling plate in the heating furnace, the molten metal is poured into the mold, and then, the mold together with the cooling plate is moved relatively to the heating furnace, thereby heating the mold. A liquid cooling member is provided on a base plate supporting a mold, and a liquid cooling member is provided to prevent the base plate from being heated by a one-way solidification casting apparatus configured to solidify the molten metal in the mold in one direction by drawing the molten metal from the mold. It is characterized by having comprised in.

Therefore, according to the first or second invention,
By providing the liquid cooling member on the base plate, it is possible to prevent the base plate from being heated to a high temperature due to heat radiation from the radiant heat body in the heating furnace. Therefore, the temperature of the molten metal in the mold is more likely to be lower than in the conventional case (when the base plate is heated to a high temperature). For this reason, the molten metal in the mold is cooled more rapidly than before,
The temperature gradient in the unidirectional solidification direction is increased, and the temperature gradient in the direction orthogonal to the unidirectional solidification direction is reduced, so that the occurrence of foreign crystals and structural defects (freckles) can be reduced, and the yield is improved. .

Further, the directional solidification casting method according to the third invention comprises:
After heating a plurality of molds disposed on the cooling plate in a heating furnace with a space inside and having a predetermined interval in the circumferential direction, a molten metal is poured into these molds, Thereafter, by moving the mold together with the cooling plate relative to the heating furnace, in the one-way solidification casting method of drawing out of the heating furnace and solidifying the molten metal in the mold in one direction, at least in the space inside the mold. Is
A liquid cooling member is provided on a base plate supporting a mold.

The directional solidification casting apparatus according to the fourth aspect of the present invention includes:
After heating a plurality of molds disposed on the cooling plate in a heating furnace with a space inside and having a predetermined interval in the circumferential direction, a molten metal is poured into these molds, Then, by moving the mold together with the cooling plate relative to the heating furnace, in a one-way solidification casting apparatus configured to draw out of the heating furnace and solidify the molten metal in the mold in one direction, at least the inside of the mold Is characterized in that a liquid cooling member is provided on a base plate supporting a mold.

Therefore, according to the third or fourth aspect,
By providing the liquid cooling member on the base plate at least in the space inside the mold, it is possible to prevent the base plate from being heated to a high temperature by heat radiation from the radiant body in the heating furnace. Therefore, the temperature of the molten metal in the mold is more likely to be lower than in the conventional case (when the base plate is heated to a high temperature). For this reason, since the molten metal in the mold is cooled more rapidly than before, the temperature gradient in the one-way solidification direction becomes large, and the temperature gradient in the direction orthogonal to the one-way solidification direction becomes small. Occurrence of tissue defects (freckles) can be reduced, and the yield is improved.

The directional solidification casting method according to the fifth invention comprises:
In the directional solidification casting method of the third invention, the liquid cooling member is relatively movable with respect to the mold, and when the mold is pulled out of the heating furnace, the position of the liquid cooling member with respect to the heating furnace is adjusted by the liquid cooling member. It is characterized in that it is not moved while it does not interfere with an obstacle such as a projection.

The directional solidification casting apparatus according to the sixth aspect of the present invention
In the directional solidification casting apparatus according to the fourth aspect of the invention, the liquid cooling member is relatively movable with respect to the mold, and when the mold is pulled out of the heating furnace, the position of the liquid cooling member with respect to the heating furnace is adjusted by the liquid cooling member. It does not move while not interfering with an obstacle such as a projection.

Therefore, according to the fifth or sixth aspect,
The heat energy radiated from the radiant body of the heating furnace is shielded by the liquid cooling member, and the heat energy is radiated from the inner surface of the mold to the liquid cooling member. For this reason, the temperature gradient in the one-way solidification direction becomes larger and the temperature gradient in the direction orthogonal to the one-way solidification direction becomes smaller than in the case of the first or second invention. Can be further reduced, and the yield is further improved.

The directional solidification casting method according to the seventh aspect of the present invention comprises:
After heating the mold disposed on the cooling plate in the heating furnace, the molten metal is poured into the mold, and then, the mold together with the cooling plate is moved relatively to the heating furnace, thereby heating the mold. In the one-way solidification casting method in which the molten metal in the mold is drawn out of the mold and solidified in one direction, the heat transfer member protruding from the surface of the cooling plate is exposed on the base plate through the base plate supporting the mold. Features.

The directional solidification casting apparatus according to the eighth aspect of the present invention includes:
After heating the mold disposed on the cooling plate in the heating furnace, the molten metal is poured into the mold, and then, the mold together with the cooling plate is moved relatively to the heating furnace, thereby heating the mold. In a one-way solidification casting device configured to solidify the molten metal in the mold in one direction by pulling out the heat transfer member protruding from the surface of the cooling plate, passing through the base plate that supports the mold, on the base plate It is characterized in that it is configured to be exposed.

Therefore, according to the seventh or eighth aspect,
Since the heat energy on the base plate is transmitted to the cooling plate via the heat transfer member, it is possible to prevent the base plate from being heated to a high temperature. Therefore, the temperature of the molten metal in the mold is more likely to be lower than in the conventional case (when the base plate is heated to a high temperature). For this reason, the molten metal in the mold is cooled more rapidly than before,
The temperature gradient in the unidirectional solidification direction is increased, and the temperature gradient in the direction orthogonal to the unidirectional solidification direction is reduced, so that the occurrence of foreign crystals and structural defects (freckles) can be reduced, and the yield is improved. .

The directional solidification casting method according to the ninth aspect of the present invention
After heating a plurality of molds disposed on the cooling plate in a heating furnace with a space inside and having a predetermined interval in the circumferential direction, a molten metal is poured into these molds, Thereafter, by moving the mold together with the cooling plate relative to the heating furnace, in the one-way solidification casting method of drawing out of the heating furnace and solidifying the molten metal in the mold in one direction, at least in the space inside the mold. Is
The heat transfer member protruding from the surface of the cooling plate is exposed to the space through the base plate supporting the mold.

The directional solidification casting apparatus according to the tenth aspect of the present invention is directed to a unidirectional solidification casting apparatus, comprising a plurality of molds arranged on a cooling plate having a space inside and having a predetermined interval in a circumferential direction thereof. After heating in the mold, the molten metal is poured into these molds, and then the mold together with the cooling plate is moved relative to the heating furnace, so that the molten metal in the mold is drawn out of the heating furnace in one direction. In the one-way solidification casting apparatus configured to solidify, at least in the space inside the mold, the heat transfer member projecting from the surface of the cooling plate is exposed to the space through the base plate supporting the mold. It is characterized by having such a configuration.

Thus, according to the ninth or tenth aspect, at least the heat energy in the space inside the mold is transmitted to the cooling plate via the heat transfer member, so that a rise in the temperature of the base plate can be prevented. . For this reason,
The temperature of the molten metal in the mold is more likely to be lower than in the conventional case (when the base plate is heated to a high temperature). For this reason, the molten metal in the mold is cooled more rapidly than before,
The temperature gradient in the unidirectional solidification direction is increased, and the temperature gradient in the direction orthogonal to the unidirectional solidification direction is reduced, so that the occurrence of foreign crystals and structural defects (freckles) can be reduced, and the yield is improved. .

Further, in the directional solidification casting method according to the eleventh aspect, the plurality of molds disposed on the cooling plate so as to have a space inside and at a predetermined interval in a circumferential direction thereof may be heated by a heating furnace. After heating in the mold, the molten metal is poured into these molds, and then the mold together with the cooling plate is moved relative to the heating furnace, so that the molten metal in the mold is drawn out of the heating furnace in one direction. In the one-way solidification casting method of solidifying, a heat dissipation prevention plate is provided so that it can be inserted into the space inside the mold through the gap between the molds, and when the mold is pulled out from the heating furnace, the heat dissipation prevention plate is used as a protrusion on the mold. It is characterized in that it is inserted into the space inside the mold as long as it does not interfere with the obstacle.

The directional solidification casting apparatus according to the twelfth aspect is characterized in that a plurality of molds disposed on a cooling plate with a space inside and at a predetermined interval in a circumferential direction are heated by a heating furnace. After heating in the mold, the molten metal is poured into these molds, and then the mold together with the cooling plate is moved relative to the heating furnace, so that the molten metal in the mold is drawn out of the heating furnace in one direction. In the one-way solidification casting apparatus configured to be solidified, a heat radiation prevention plate is provided so that it can be inserted into the space inside the mold through the gap between the molds, and when the mold is pulled out from the heating furnace, the heat radiation prevention plate is molded. As long as it does not interfere with an obstruction such as a projection, the insert is inserted into the space inside the mold.

Therefore, according to the eleventh or twelfth aspect, the heat energy radiated from the radiant body of the heating furnace is shielded by the radiation prevention plate. For this reason, the temperature gradient in the one-way solidification direction becomes larger and the temperature gradient in the direction orthogonal to the one-way solidification direction becomes smaller than before, so that the occurrence of foreign crystals and structural defects can be reduced, and the yield can be reduced. improves.

Further, according to a thirteenth aspect of the present invention, there is provided the unidirectional solidification casting method, wherein a plurality of molds provided on the cooling plate so as to have a space inside and at a predetermined interval in a circumferential direction thereof are heated by a heating furnace. After heating in the mold, the molten metal is poured into these molds, and then the mold together with the cooling plate is moved relative to the heating furnace, so that the molten metal in the mold is drawn out of the heating furnace in one direction. In the one-way solidification casting method of solidifying, a liquid cooling plate is provided so that it can be inserted into the space inside the mold through the gap between the molds, and when the mold is pulled out from the heating furnace, the liquid cooling plate is used as a protrusion on the mold. It is characterized in that it is inserted into the space inside the mold as long as it does not interfere with the obstacle.

A fourteenth aspect of the present invention is directed to a unidirectional solidification casting apparatus, comprising: a plurality of molds arranged on a cooling plate having a space inside thereof and a predetermined interval in a circumferential direction thereof; After heating in the mold, the molten metal is poured into these molds, and then the mold together with the cooling plate is moved relative to the heating furnace, so that the molten metal in the mold is drawn out of the heating furnace in one direction. In the unidirectional solidification casting apparatus configured to solidify, a liquid cooling plate is provided so that it can be inserted into the space inside the mold through the gap between the molds, and when the mold is pulled out from the heating furnace, the liquid cooling plate is molded. As long as it does not interfere with an obstruction such as a projection, the insert is inserted into the space inside the mold.

Therefore, according to the thirteenth or fourteenth aspect, heat energy is radiated from the inner surface of the mold to the water cooling plate inserted into the space inside the mold. That is, not only heat radiation from the outer surface of the mold but also heat radiation from the inner surface of the mold are possible. For this reason, the temperature gradient in the unidirectional solidification direction increases and the temperature gradient in the direction orthogonal to the unidirectional solidification direction decreases, so that the occurrence of foreign crystals and structural defects can be reduced, and the yield is improved.

A fifteenth aspect of the present invention provides the directional solidification casting method according to the thirteenth aspect, wherein the liquid cooling plate is divided into a plurality of parts in the drawing direction of the mold, and each of the liquid cooling plates is It is characterized in that it can be inserted independently into the space inside the mold through the gap between the molds.

A directional solidification casting apparatus according to a sixteenth aspect of the present invention is the directional solidification casting apparatus according to the fourteenth aspect, wherein the liquid cooling plate is divided into a plurality of parts in the direction in which the mold is drawn out, and each of the liquid cooling plates is It is characterized in that it can be inserted into the space inside the mold independently through the gap between the molds.

Therefore, according to the fifteenth or sixteenth aspect, the cooling effect of the water cooling plate can be further enhanced.
For this reason, the temperature gradient in the one-way solidification direction becomes larger and the temperature gradient in the direction orthogonal to the one-way solidification direction becomes smaller as compared with the case where the water cooling plate is integrated. Can be further reduced, and the yield is further improved.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a configuration of a unidirectional solidification casting apparatus according to Embodiment 1 of the present invention.

FIG. 2 is an enlarged plan view of an essential part taken along line DD in FIG. 1;

FIG. 3 is a cross-sectional view showing a configuration of a one-way solidification casting apparatus according to Embodiment 2 of the present invention.

FIG. 4 is a cross-sectional view showing a configuration of the unidirectional solidification casting apparatus according to the embodiment of the present invention (a state during the unidirectional solidification process).

FIG. 5 is an enlarged plan view of an essential part taken along line EE in FIG. 4;

FIG. 6 is a cross-sectional view showing a configuration of a one-way solidification casting apparatus according to Embodiment 4 of the present invention.

FIG. 7 is a cross-sectional view showing a state during the one-way solidification process by the one-way solidification casting apparatus.

FIG. 8 is a cross-sectional view showing a state immediately before the one-way solidification process is completed by the one-way solidification casting apparatus.

9 is an enlarged plan view of a main part as viewed in the direction of arrow F in FIG. 7;

FIG. 10 is an enlarged plan view of a main part taken along line GG in FIG. 7;

FIG. 11 is a sectional view showing a configuration of a conventional one-way solidification casting apparatus.

FIG. 12 is a cross-sectional view showing a state during the one-way solidification process by the one-way solidification casting apparatus.

FIG. 13 is an enlarged plan view of a main part taken along line AA in FIG.

[Description of Signs] 1 vacuum chamber 2 heating furnace 6a, 6b radiation prevention plate 6a-1, 6b-1 opening 7 heat insulating material 8 radiant heat body 10 mold 10a mold protrusion 11 cooling plate 12 space 13 runner 14 Gate 15 Base rate 16 Molten metal 17 Elevating shaft 18 Cooling ring 20 Partition valve 21 Melting furnace 31 Water-cooled copper plate 32 Water-cooled copper plate 41 Elevating shaft 51 Copper column 61 Sliding control device 62 Radiation prevention plate 63 Water cooling plate 63a, 63b, 63c, 63d , 63e water cooling plate

Claims (16)

[Claims] After heating a mold provided on a cooling plate in a heating furnace, a molten metal is poured into the mold, and then the mold is moved together with the cooling plate relative to the heating furnace. Thus, in the one-way solidification casting method in which the molten metal in the mold is pulled out of the heating furnace and solidified in one direction, a liquid cooling member is provided on a base plate that supports the mold,
A one-way solidification casting method, wherein heating of the base plate is prevented by the liquid cooling member. 2. After heating a mold provided on a cooling plate in a heating furnace, a molten metal is poured into the mold, and then the mold is moved together with the cooling plate relative to the heating furnace. Thus, in a one-way solidification casting apparatus configured to pull out of the heating furnace and solidify the molten metal in the mold in one direction, a liquid cooling member is provided on a base plate supporting the mold,
A one-way solidification casting apparatus, wherein the liquid cooling member is configured to prevent heating of the base plate. 3. Heating a plurality of molds disposed on a cooling plate so as to have a space inside and at a predetermined interval in a circumferential direction thereof in a heating furnace, and then into the molds. In a one-way solidification casting method in which the molten metal is poured, and then the mold together with the cooling plate is moved relatively to the heating furnace, so that the molten metal in the mold is drawn out of the heating furnace and solidified in one direction. A one-way solidification casting method, wherein a liquid cooling member is provided on a base plate supporting a mold in an inner space portion. 4. After heating a plurality of molds disposed on a cooling plate so as to have a space inside and have a predetermined interval in a circumferential direction thereof in a heating furnace, A one-way solidification casting apparatus configured to inject the molten metal and then move the mold together with the cooling plate relative to the heating furnace to draw it out of the heating furnace and solidify the molten metal in the mold in one direction. 3. The unidirectional solidification casting apparatus according to claim 1, wherein a liquid cooling member is provided on a base plate supporting the mold, at least in a space inside the mold. 5. The unidirectional solidification casting method according to claim 3, wherein the liquid cooling member is relatively movable with respect to the mold, and when the mold is pulled out of the heating furnace, the position of the liquid cooling member with respect to the heating furnace is changed. A one-way solidification casting method, wherein the liquid cooling member is not moved while not interfering with an obstacle such as a projection of the mold. 6. The one-way solidification casting apparatus according to claim 4, wherein the liquid cooling member is relatively movable with respect to the mold, and when the mold is pulled out of the heating furnace, the position of the liquid cooling member with respect to the heating furnace is changed. A one-way solidification casting apparatus, wherein the liquid cooling member is not moved while not interfering with an obstacle such as a projection of a mold. 7. A mold provided on a cooling plate is heated in a heating furnace, a molten metal is poured into the mold, and then the mold is moved together with the cooling plate relative to the heating furnace. Thus, in the one-way solidification casting method in which the molten metal in the mold is drawn out of the heating furnace and solidified in one direction, the heat transfer member protruding from the surface of the cooling plate is passed through the base plate supporting the mold and placed on the base plate. A one-way solidification casting method characterized by exposing to a solid. 8. After heating a mold provided on a cooling plate in a heating furnace, a molten metal is poured into the casting mold, and thereafter, the casting mold is moved together with the cooling plate relative to the heating furnace. Therefore, in the unidirectional solidification casting apparatus configured to solidify the molten metal in the mold in one direction by drawing from the heating furnace, the heat transfer member protruding from the surface of the cooling plate passes through the base plate supporting the mold. A one-way solidification casting apparatus characterized in that it is configured to be exposed on a base rate. 9. After heating a plurality of molds disposed on a cooling plate with a space inside and having a predetermined interval in the circumferential direction in a heating furnace, the molds are inserted into the molds. In a one-way solidification casting method in which the molten metal is poured, and then the mold together with the cooling plate is moved relative to the heating furnace, so that the molten metal in the mold is drawn out of the heating furnace and solidified in one direction. A one-way solidification casting method, wherein a heat transfer member protruding from a surface of a cooling plate is exposed through the base plate supporting a mold in the inner space in the inner space. 10. A plurality of molds provided on a cooling plate having a space inside and having a predetermined interval in a circumferential direction thereof are heated in a heating furnace. A one-way solidification casting apparatus configured to inject the molten metal and then move the mold together with the cooling plate relative to the heating furnace to draw it out of the heating furnace and solidify the molten metal in the mold in one direction. In one direction, at least in a space inside the mold, a heat transfer member protruding from the surface of the cooling plate is configured to be exposed to the space through a base plate supporting the mold. Solidification casting equipment. 11. A plurality of molds provided on a cooling plate having a space inside and having a predetermined interval in a circumferential direction thereof are heated in a heating furnace. In a one-way solidification casting method in which the molten metal is poured, and then the mold together with the cooling plate is moved relative to the heating furnace, so that the molten metal in the mold is drawn out of the heating furnace and solidified in one direction. A heat radiation prevention plate is provided so that it can be inserted into the space inside the mold through the gap, and when the mold is pulled out of the heating furnace, the heat radiation prevention plate is placed inside the mold as long as it does not interfere with obstacles such as protrusions of the mold. A one-way solidification casting method characterized by being inserted into a space. 12. After heating a plurality of molds disposed on a cooling plate so as to have a space inside and at a predetermined interval in a circumferential direction thereof in a heating furnace, the molds are inserted into the molds. A one-way solidification casting apparatus configured to inject the molten metal and then move the mold together with the cooling plate relative to the heating furnace to draw it out of the heating furnace and solidify the molten metal in the mold in one direction. In the above, a heat radiation prevention plate is provided so that it can be inserted into the space inside the mold through the gap between the molds, and when the mold is pulled out of the heating furnace, the heat radiation prevention plate does not interfere with obstacles such as protrusions of the mold. A one-way solidification casting apparatus characterized in that it is configured to be inserted into a space inside a mold. 13. After heating a plurality of molds provided on a cooling plate so as to have a space inside and have a predetermined interval in a circumferential direction thereof in a heating furnace, the molds are inserted into the molds. In a one-way solidification casting method in which the molten metal is poured, and then the mold together with the cooling plate is moved relative to the heating furnace, so that the molten metal in the mold is drawn out of the heating furnace and solidified in one direction. A liquid cooling plate is provided so that it can be inserted into the space inside the mold through the gap, and when the mold is pulled out from the heating furnace, the liquid cooling plate is placed inside the mold as long as it does not interfere with obstacles such as protrusions of the mold. A one-way solidification casting method characterized by being inserted into a space. 14. A plurality of molds provided on a cooling plate having a space inside and having a predetermined interval in a circumferential direction thereof are heated in a heating furnace. A one-way solidification casting apparatus configured to inject the molten metal and then move the mold together with the cooling plate relative to the heating furnace to draw it out of the heating furnace and solidify the molten metal in the mold in one direction. In the above, a liquid cooling plate is provided so that it can be inserted into the space inside the mold through the gap between the molds, and when the mold is pulled out of the heating furnace, the liquid cooling plate does not interfere with obstacles such as protrusions of the mold. A one-way solidification casting apparatus characterized in that it is configured to be inserted into a space inside a mold. 15. The one-way solidification casting method according to claim 13, wherein the liquid cooling plate is divided into a plurality in the drawing direction of the mold, and each of the liquid cooling plates independently passes through the mutual gap of the mold. A one-way solidification casting method characterized in that it can be inserted into a space inside a mold. 16. The one-way solidification casting apparatus according to claim 14, wherein the liquid cooling plate is divided into a plurality in the drawing direction of the mold, and these liquid cooling plates are independently passed through the mutual gap of the mold. A one-way solidification casting apparatus characterized in that it can be inserted into a space inside a mold.