JP5408730B2 - Metal plate manufacturing apparatus and metal plate manufacturing method - Google Patents

Description

  The present invention relates to a metal plate manufacturing apparatus and a metal plate manufacturing method for manufacturing a single-layer metal plate or a multi-layer clad metal plate by continuous casting using a roll.

In recent years, there has been a strong demand for reducing CO ₂ emissions in the industrial world. Therefore, in the automobile industry, it has been proposed to use an aluminum alloy thin plate or an aluminum alloy clad plate in order to reduce the weight of the vehicle.

  As a method for producing an aluminum alloy thin plate, a twin roll method is well known as a method using DC casting or a method cheaper than that, but as a method of producing cheaper than the twin roll method, A single roll method as shown in Non-Patent Document 1 is known.

  Moreover, as a method for producing an aluminum alloy clad plate, a joining method in which an aluminum alloy thin plate is produced and then rolled and joined, and a twin roll as shown in Non-Patent Document 2, Patent Documents 1 and 2 are used. The law is known. In the above joining method, in order to produce an aluminum alloy thin plate, equipment for carrying out chamfering treatment, heat treatment, hot rolling treatment, and cold rolling treatment on a slab having a thickness of about 600 mm produced by DC casting and A process is required, and in order to join an aluminum alloy sheet, equipment and a process for degreasing, edge welding, and hot rolling are required. Therefore, the clad plate obtained by the above bonding method is expensive. On the other hand, the twin-roll method has an advantage that a clad plate can be produced at low cost because it can be executed with a simple apparatus with a reduced process.

JP 2008-142766 A JP 2009-125794 A

Toshio Haga, 3 others, “Contact condition of molten metal and roll on properties of Al-12% Si alloy plate by melt drag method”, Light Metal Vol. 48, No. 12, 1998, P613-617 T.A. Haga, 3 others, “Clad strip casting by a twin roll caster”, Archives of Materials Science and Engineering, Volume 37, Issue 2, June 2009, P117-124

  In the single roll method of Non-Patent Document 1, when continuously produced, a bulky raised portion is generated on the surface of the metal layer formed by the roll, so the thickness of the obtained aluminum alloy thin plate Is a non-uniformity.

Further, in the roll method, when an aluminum alloy containing magnesium is used as the molten metal, the molten metal easily undergoes solidification shrinkage, and when solidification shrinkage occurs, gaps are formed between crystal grains, and a cast hole is generated. The single roll method has a problem that a cast hole is likely to occur on the free solidified surface of the formed metal layer. By the way, the free solidified surface is a surface solidified without directly touching the roll surface.

  In the twin roll method of Patent Documents 1 and 2 above, a partition plate is provided for the purpose of preventing molten metal from being mixed with each other, but because the distance between the leading edge of the partition plate and the roll is fixed, Molten metal leakage is likely to occur, and when the molten metal is excessively solidified on the roll surface, there is a problem that the solidified layer is clogged in the gap between the roll surface and the tip edge and the apparatus stops. . In addition, since the free solidified surface is not smooth, the joining interface of the obtained clad plate is not flat, and mixing and reaction occur between the metal layers, so the joining interface is unclear, and thus the resulting metal There is a problem that the physical properties of the plate are not stable.

  Furthermore, in the twin roll method, as described in claim 1 of Patent Document 1, it is necessary to complete the formation of a solidified shell of the molten metal on the high melting point side before joining. Moreover, it is an essential condition that the pouring temperature of the material having a low melting point is higher than the liquidus temperature of the material having a high melting point. However, in order to maintain the soundness of the molten metal having a low melting point material without absorbing gas, and to form a fine structure by rapidly solidifying the low melting point material, the injection of the low melting point material is required. The hot water temperature is desirably a temperature that is lower than the liquidus temperature of the material having a high melting point and close to the liquidus line even if it is higher than the liquidus line of the material. The heat load on the roll and the roll is also reduced. For this reason, there is a demand for a method capable of joining even when the pouring temperature of a material having a low melting point is lower than the liquidus temperature of a material having a high melting point.

Further, in the twin roll method of Non-Patent Document 2, in an apparatus for producing a two-layer clad alloy plate, a high-melting-point metal melt is converted into a low-melting-side melt using a movable partition plate called “scriber”. A method to prevent leaking into the pool is shown. However, since the movable partition plate is composed of a flat plate and the leading edge thereof is mainly in line contact with the metal layer formed on the roll surface, adjustment of the urging force for pressing the metal layer is not possible. difficult. Therefore, in this movable partition plate, it is possible to scrape all the semi-solidified part of the free solidified surface and pull out only the solidified layer, but only the highly fluidized part of the semi-solidified part. It is difficult to adjust the solid fraction of the semi-solidified portion by scraping and leaving the low fluidity portion on the solidified layer. Furthermore, when the urging force is weak, molten metal leakage occurs, and when the urging force is strong, the solidified material is clogged in the gap between the roll surface and the leading edge of the movable partition plate, and the apparatus stops. There is a problem.

  By the way, when another movable partition plate is added to the two-layer clad alloy plate manufacturing apparatus shown in Non-Patent Document 2, the inner side as shown in the sixth embodiment of the present invention is added. Although a three-layer clad alloy plate manufacturing apparatus that uses a low-melting-point metal material and a higher-melting-point material on the outside can be configured, the above problem also occurs in the manufacturing process of a three-layer clad alloy plate. To do. Also, if the semi-solid portion of the metal layer is scraped off with a movable partition plate and the surface of the metal layer is brought into a solid state and then joined, the pouring temperature of the second molten metal having a low melting point is set to a high melting point. If the temperature is not higher than the liquidus temperature of the first metal and the third metal, there is a problem that a gap is formed at the bonding interface. However, if the pouring temperature of the second molten metal is high, the second molten metal absorbs the gas and remains as fine bubbles on the resulting metal plate, so that the physical properties are likely to deteriorate. Further, since the second metal melt is not rapidly solidified, a fine structure cannot be formed. Therefore, the ductility of the resulting metal plate is inferior. Furthermore, since the heat load on both rolls is increased, there is a problem that the burden on the cooling function of the apparatus is also increased.

  An object of the present invention is to solve the above-described problems in a metal plate manufacturing apparatus and a metal plate manufacturing method for manufacturing a single-layer metal plate or a multi-layer clad metal plate by continuous casting using a roll. The present invention provides a metal plate manufacturing apparatus and a metal plate manufacturing method capable of manufacturing a single-layer metal plate or a multi-layer clad metal plate at low cost in a reduced process.

  In the metal plate manufacturing apparatus for manufacturing a single-layer metal plate or a multi-layer clad metal plate by continuous casting using a roll, the present invention stores a first roll having cooling ability and a first metal melt. A first pool, a first pool surface, a first front plate located in front of the first roll in the rotational direction, and a rear located in the rear of the first roll in the rotational direction. The first front plate has a tip portion and is movably provided so that the distance between the tip portion and the surface of the first roll can be changed. The first roll rotates with the first metal layer while cooling the first metal melt in the first pool to form a semi-solid or solidified first metal layer on the surface of the first roll. The first front plate rotates the first roll The semi-solidified state the surface of the first metal layer to move with it, the distal end portion of the first front plate is biased to a surface to always contact with a constant force, it is characterized in that.

  By the way, the molten metal gradually changes from a liquid phase state to a solid phase state by cooling with a roll. The liquid phase state refers to a liquid state, and the solid phase state refers to a completely solidified solid state. The semi-solid state is a state in which the liquid phase and the solid phase are mixed and exist at the same time, and refers to a state between the liquid phase state and the solid phase state. The solid phase ratio refers to the ratio of the solid phase in the semi-solid state. The lower the solid phase ratio, the higher the fluidity because the semi-solid state is closer to the liquid state, and the higher the solid phase ratio, the lower the fluidity because the semi-solid state is closer to the solid state. To do.

  According to the metal plate manufacturing apparatus of the present invention, the tip of the first front plate continues to abut the surface of the first metal layer on the semi-solidified surface with a constant force. Easily leveling the first metal layer while scraping the semi-solidified surface of the first metal layer, and therefore the first metal layer can be adjusted to a constant thickness. Therefore, according to the apparatus of the present invention, it is possible to obtain a single-layer metal plate that is free of cast holes and segregation, has a smooth surface, and has a substantially uniform thickness distribution. Incidentally, the scraped semi-solid is melted again by the heat of the molten metal, so that it does not clog the gap between the tip of the first front plate and the first roll.

Furthermore, as described above, the surface of the first metal layer can be smoothed by the first front plate, so that when the second metal layer is formed on the surface, a clad metal plate having a good bonding interface can be obtained. it can.

  In addition, by adjusting the urging force to the first front plate, the solid phase ratio of the semi-solid state portion of the first metal layer is adjusted, and the semi-solid state surface of the first metal layer is reduced to a semi-solid state with low fluidity. Even when the pouring temperature of the second molten metal having a low melting point is lower than the first metal liquidus temperature having a high melting point, the molten metal does not mix and react with each other even if the molten metal is kept in a solidified state. It is possible to obtain a good clad metal plate having a clear bonding interface and having high adhesion at the bonding interface without generating a gap in the bonding interface. Thereby, the second metal melt having a low melting point can be poured even at a temperature that is lower than the liquidus temperature of the material having a high melting point and close to the liquidus at least higher than the liquidus line of the second metal. Since the second molten metal maintains soundness without absorbing gas and the second molten metal is rapidly solidified by solidification to form a fine structure, the ductility of the resulting metal plate is excellent. In this case, the heat load on the first metal melt having a high melting point and on the roll is also reduced. Therefore, the burden on the cooling function of the apparatus can be reduced.

It is a front section schematic diagram showing a 1st embodiment of a metal plate manufacturing device of the present invention. It is the II arrow partial view of FIG. It is a partial cross section fragmentary view of a 1st scraper. It is a front section schematic diagram showing operation of a 1st embodiment. It is a front section schematic diagram showing a 2nd embodiment of a metal plate manufacturing device of the present invention. It is a front sectional schematic diagram showing operation of a 2nd embodiment. It is a front section schematic diagram showing a 3rd embodiment of a metal plate manufacturing device of the present invention. It is a front section schematic diagram showing operation of a 3rd embodiment. It is a front section schematic diagram showing a 4th embodiment of a metal plate manufacturing device of the present invention. It is a front sectional schematic diagram showing operation of a 4th embodiment. It is a front section schematic diagram showing operation of a 5th embodiment of a metal plate manufacturing device of the present invention. It is a front section schematic diagram showing operation of a 6th embodiment of a metal plate manufacturing device of the present invention. It is a front cross-sectional schematic diagram which shows the action | operation of 7th Embodiment of the metal plate manufacturing apparatus of this invention. It is the photograph replaced with drawing which shows the cross section of the clad metal plate obtained in 2nd Example. It is the photograph replaced with drawing which shows the cross section of the clad metal plate produced in order to compare with 2nd Example.

[First Embodiment]
FIG. 1 is a schematic front sectional view showing a first embodiment of a metal plate manufacturing apparatus of the present invention. This apparatus 10A is an apparatus for producing a single-layer metal plate from one type of molten metal, and employs a single roll method.

  The apparatus 10A includes a first roll 1 and a first pool 3A.

  The first roll 1 rotates while cooling the molten metal in contact with the surface 11. That is, the first roll 1 forms a semi-solid or solidified metal layer on the surface 11. However, the metal layer rotates with the metal layer, and the metal layer is completely solidified while rotating. The first roll 1 has a cooling mechanism (not shown) for cooling the molten metal in contact with the surface 11 thereof. As the cooling mechanism, a “water-cooling type” is employed in which the cooling function is exhibited by circulating cooling water inside the roll, but other mechanisms may be adopted. Further, as long as a cooling mechanism is provided outside the first roll 1, the cooling mechanism may not be provided inside the first roll 1.

  The first pool 3 </ b> A has a first front plate (hereinafter referred to as “first”) that is positioned in front of the surface 11 of the first roll 1 and the rotation direction (arrow R <b> 1) of the first roll 1 so that the molten metal can be stored. (Referred to as “scraper”) 5 </ b> A, a rear member 31 positioned rearward in the rotation direction of the first roll 1, and both side members 32.

  The rear member 31 is made of a plate because it is inexpensive to manufacture and easy to install. However, other members may be used as long as the rear wall of the first pool 3A can be formed. The leading edge 311 of the rear member 31 is close to the surface 11 of the first roll 1 up to a distance that can prevent the molten metal stored in the first pool 3A from leaking backward. The leading edge 311 of the rear member 31 may abut against the surface 11 of the first roll 1 as long as the rotation of the first roll 1 is allowed, but does not wear each other due to friction with the rotating first roll 1. In order to achieve this, it is preferable not to contact the surface 11 of the first roll 1.

  FIG. 2 is a partial view taken along the arrow II in FIG. Here, both side members 32 are formed of plates, but may be other members as long as both side walls of the first pool 3A can be formed. Further, both side members 32 may not be fixed at the positions shown in FIG. Specifically, a disc or ring-shaped both side member 32 may be attached to the end of the first roll 1 so as to be a flange of the first roll 1. As shown in FIG. 1, the side member 32 has a length S that can secure a space between the first scraper 5 </ b> A and the rear member 31. The inner surface 321 of the side member 32 is close to the side surface 12 of the first roll 1 to a distance that can prevent the molten metal stored in the first pool 3 </ b> A from leaking to both sides of the first roll 1. The inner surface 321 of the side member 32 may abut against the side surface 12 of the first roll 1 as long as the rotation of the first roll 1 is allowed, but is not worn by friction with the rotating first roll 1. For this purpose, it is preferable that the first roll 1 is not in contact with the side surface 12.

  The first scraper 5A is provided by processing a plate so as to constitute the front wall of the first pool 3A. As shown in the cross-sectional view of FIG. 1, the first scraper 5 </ b> A has a folded form here, but may have a linear or arcuate form. The first scraper 5A has its tip bent at an obtuse angle, and the tip from the bent portion becomes the tip 51A. And the 1st scraper 5A is provided so that the distance HA between 51 A of front-end | tip parts and the surface 11 of the 1st roll 1 can change. Specifically, the first scraper 5A is supported by the base end portion 52A so as to be rotatable around the horizontal axis 521A (in the direction of the arrow Y), whereby the distance HA is variable. The first scraper 5A is always urged so as to rotate in the direction in which the distance HA decreases (the direction of the arrow Y1). Specifically, a weight 6A having a predetermined weight is connected to the base end portion 52A of the first scraper 5A via a string 61A, and the first scraper 5A is rotated in the arrow Y1 direction by the weight 6A. So that it is always pulled with a constant force. Thereby, the front-end | tip part 51A of 5 A of 1st scrapers is always urged | biased with the fixed force toward the surface 11 of the 1st roll 1. FIG. This constant force is a force corresponding to the hardness of the molten metal poured into the first pool 3A in the semi-solid state, and scrapes a portion of the semi-solid surface of the metal layer where the solid phase ratio is low. The force is enough to level the metal layer while removing it. Even if the distance HA changes, the first scraper 5A can be biased with a constant force at all times, and since the apparatus can be simply configured, it is preferable to use the force of the weight. May be used, other mechanisms such as hydraulic pressure may be employed.

  The tip 51A of the first scraper 5A is in contact with a semi-solid or solidified metal layer on the first roll, but since this metal layer is parallel to the roll surface, the tip 51A is in contact with this metal layer. In order to make surface contact instead of line contact, the angle formed between the first roll 1 and the back surface (roll-side surface) of the tip 51A needs to be less than 30 degrees, and more preferably the angle is 0. That is, they are parallel. The length of the tip 51A is preferably 5 mm or more and 30 mm or less, and preferably 10 mm or more and 20 mm or less. This is because if the length of the tip 51A is too short, the effect of surface contact is weakened, and if it is too long, the solidified material may accumulate on the extended tip. Moreover, although the back surface of a front-end | tip part has a preferable plane, it may become a convex surface with a large curvature radius in the range which does not impair planarity substantially.

  FIG. 3 is a partial cross-sectional partial view of the first scraper 5A. The first scraper 5 </ b> A employs a configuration in which the surface of the core material 531 is doubly covered with two types of protective materials 532 and 533. Although a steel plate is employed for the core material 531, the material is not particularly limited, and other metal plates may be employed. A protective material is provided on the surface of the core material 531 in a thickness that does not impair flatness in order not to react with the molten metal and to prevent a temperature drop of the molten metal due to heat conduction from the scraper. . As the protective materials 532 and 533, a cross sheet such as silica or alumina silica can be used.

  Next, the operation of the apparatus 10A having the above configuration will be described with reference to FIG. In FIG. 4, the illustration of both side members 32 is omitted.

  First, the apparatus 10A is activated while pouring the first molten metal 4A into the first pool 3A (first pouring step). Then, the first roll 1 rotates at a predetermined speed and the cooling function is activated. As a result, the first roll 1 cools the first molten metal 4A in the first pool 3A in contact with the surface 11 to form the first metal layer 41 in a semi-solid state or a solid state. It rotates with the metal layer 41 (first cooling step). The first metal layer 41 changes from the surface 11 side of the first roll 1 to a solidified state. Further, the circumferential distance L1 (FIG. 1) from the lower end edge 311 of the rear member 31 to the tip 51A of the first scraper 5A is set to a distance at which the first metal layer 41 having a semi-solidified surface can be formed. ing. And after the 1st metal layer 41 passed between the front-end | tip part 51A of the 1st scraper 5A, and the surface 11 of the 1st roll 1, ie, the 1st roll 1 exceeded the 1st scraper 5A. The first metal layer 41 is further cooled and completely solidified while rotating. Thus, a metal plate 40A in which the first molten metal 4A is completely solidified is obtained.

  By the way, when the first metal layer 41 having a semi-solidified surface exceeds the first scraper 5A, the tip 51A of the first scraper 5A continues to abut on the surface of the first metal layer 41 with a constant force (see FIG. First scraping step). That is, the tip 51 </ b> A of the first scraper 5 </ b> A follows the thickness of the first metal layer 41. Thereby, the semi-solid state surface of the first metal layer 41 is leveled while being scraped off, and the first metal layer 41 is adjusted to a constant thickness.

  Therefore, according to the apparatus 10A, the tip 51A of the first scraper 5A continues to abut on the semi-solidified surface of the first metal layer 41 with a constant force, and thus the cast hole and composition bias are likely to occur. While scraping off the semi-solidified surface of the first metal layer 41, the first metal layer 41 can be adjusted to a certain thickness. Therefore, according to the apparatus of the present invention, it is possible to obtain a single-layer metal plate 40A that is free of cast holes and segregation, has a smooth surface, and has a substantially uniform plate thickness distribution.

  In particular, when an aluminum alloy containing magnesium is used as the molten metal, casting using the roll method tends to cause solidification shrinkage, and when solidification shrinkage occurs, gaps are formed between crystal grains. Cheap. However, since the first scraper 5A scrapes off the portion where the cast hole near the surface of the first metal layer 41 is likely to be generated, the single-layer aluminum magnesium alloy metal plate 40A having no cast hole can be obtained.

  Further, the tip 51A of the first scraper 5A makes surface contact with the surface of the first metal layer 41 in the above operation. Therefore, the tip portion 51 </ b> A reliably contacts the surface of the first metal layer 41. Therefore, according to the apparatus 10A, the above-described function of the first scraper 5A can be exhibited better.

  Furthermore, since the surface of the first scraper 5A is covered with the protective material 532, 533, in the above operation, the temperature drop of the first metal melt 4A is prevented, and the first metal melt 4A is not removed from the first scraper 5A. It is prevented from sticking to the surface of the film. Therefore, according to the apparatus 10A, also from this point, the above-described function of the first scraper 5A can be exhibited more satisfactorily, and the production efficiency of the metal plate 40A can be improved.

[Second Embodiment]
FIG. 5 is a schematic front sectional view showing a second embodiment of the metal plate manufacturing apparatus of the present invention. This apparatus 10B is an apparatus for producing a two-layer clad metal plate from two types of molten metal, and employs a single roll method.

  The apparatus 10B includes a first roll 1, a first pool 3A, and a second pool 3B.

  The first roll 1 has the same configuration as the first roll 1 of the first embodiment.

  The first pool 3A has the same configuration as the first pool 3A of the first embodiment.

  The second pool 3B is provided in front of the first scraper 5A, both side members 32, and the first scraper 5A in the rotational direction of the first roll 1 (arrow R1 direction) so that the molten metal can be stored. A second front plate (hereinafter referred to as “second scraper”) 5 </ b> B and the surface 11 of the first roll 1 are surrounded.

  The first scraper 5A has the same configuration as the first scraper 5A of the first embodiment.

  The second scraper 5B constitutes the front wall of the second pool 3B. The second scraper 5B has the same form as the first scraper 5A, and is movably provided so that the distance HB between the tip 51B and the surface 11 of the first roll 1 can be changed. Specifically, the second scraper 5B is supported at the base end portion 52B so as to be rotatable around the horizontal axis 521B (in the direction of the arrow Y), thereby making the distance HB variable. Further, the second scraper 5B is always urged so as to rotate in a direction (arrow Y1 direction) in which the distance HB decreases. Specifically, a weight 6B having a predetermined weight is connected to the base end portion 52B of the second scraper 5B via a string 61B, and the second scraper 5B is rotated in the arrow Y1 direction by the weight 6B. So that it is always pulled with a constant force. Thereby, the front-end | tip part 51B of the 2nd scraper 5B is always urged | biased with the fixed force toward the surface 11 of the 1st roll 1. FIG. This constant force is a force corresponding to the hardness of the molten metal poured into the second pool 3B in the semi-solid state, and scrapes a portion of the semi-solid surface of the metal layer where the solid phase ratio is low. The force is enough to level the metal layer while removing it. The second scraper 5B can be urged with a constant force even when the distance HB changes, and since the apparatus can be simply configured, it is preferable to use the force of the weight, but the same effect May be used, other mechanisms such as hydraulic pressure may be employed.

  In order for the tip 51B of the second scraper 5B to come into surface contact with the metal layer, the back surface (roll side surface) of the first roll 1 and the tip 51B in the same manner as the first scraper 5A of the first embodiment. It is necessary that the angle formed with the angle is less than 30 degrees, and more preferably the angle is 0, that is, parallel. The length of the tip 51B is preferably 5 mm or more and 30 mm or less, and preferably 10 mm or more and 20 mm or less. This is because if the length of the tip 51B is too short, the effect of surface contact is weakened, and if it is too long, the solidified product may be deposited on the extended tip. The back surface of the tip 51B is preferably a flat surface, but may be a convex surface having a large radius of curvature within a range that does not substantially impair the flatness.

  Moreover, the 2nd scraper 5B employ | adopts the structure by which the surface of the core material 531 was doubly covered with two types of protective materials 532 and 533 similarly to the 1st scraper 5A (FIG. 3).

  The rear member 31 has the same configuration as the rear member 31 of the first embodiment.

  Both side members 32 have the same configuration as the both side members 32 of the first embodiment, but are expanded and provided so that both side walls of the second pool 3B can also be configured. Or you may employ | adopt the 1st roll 1 with a hook which showed the specific example in 1st Embodiment.

  Next, the operation of the apparatus 10B configured as described above will be described with reference to FIG. In FIG. 6, illustration of both side members 32 is omitted. Further, the melting point of the second molten metal 4B poured into the second pool 3B is equal to or lower than the melting point of the first molten metal 4A poured into the first pool 3A.

  First, the apparatus 10B is activated while pouring the first molten metal 4A into the first pool 3A and while pouring the second molten metal 4B into the second pool 3B. Then, the first roll 1 rotates at a predetermined speed and the cooling function is activated. Thus, the first roll 1 cools the first molten metal 4A in the first pool 3A in contact with the surface thereof to form the first metal layer 41 in a semi-solid state or a solid state, thereby forming the first metal. Rotate with layer 41. The first metal layer 41 changes from the surface 11 side of the first roll 1 to a solidified state. Moreover, the circumferential distance L1 (FIG. 6) from the lower end edge 311 of the rear member 31 in the 1st roll 1 to the front-end | tip part 51A of the 1st scraper 5A can form the 1st metal layer 41 which has a semi-solidified surface. The distance is set.

  When the first metal layer 41 moves with the rotation of the first roll 1 and exceeds the first scraper 5A, the second molten metal 4B in the second pool 3B comes into contact with the first metal layer 41. Thus, the first metal layer 41 is heated to a temperature at which metal bonding is possible, and the second molten metal 4B itself is cooled. As a result, a second metal layer 42 in a semi-solid state of the second molten metal 4B is formed on the surface of the first metal layer 41, and the second metal layer 42 is moved along with the rotation of the first roll 1 to the first metal layer 42. It moves with the metal layer 41. Then, the first metal layer 41 and the second metal layer 42 are further cooled as the first roll 1 rotates.

  Thereby, the clad metal plate 40B formed by joining the first metal layer 401 formed by completely solidifying the first molten metal 4A and the second metal layer 402 formed by completely solidifying the second molten metal 4B, can get.

  By the way, when the first metal layer 41 exceeds the first scraper 5A, the tip 51A of the first scraper 5A continues to abut on the surface of the first metal layer 41 with a constant force. Thereby, the semi-solid state surface of the first metal layer 41 is leveled while being scraped off, and the first metal layer 41 is adjusted to a constant thickness. Therefore, the second metal layer 42 is formed on the flat surface of the first metal layer 41.

  On the other hand, when the second metal layer 42 exceeds the second scraper 5B, the tip 51B of the second scraper 5B continues to abut on the surface of the second metal layer 42 with a certain force. As a result, the semi-solid state surface of the second metal layer 42 is leveled while being scraped off, and the second metal layer 42 is adjusted to a constant thickness.

  Therefore, according to the device 10B, the interface between the first metal layer 401 and the second metal layer 402 is clear, and the thickness distribution of the first metal layer 401 and the second metal layer 402 is substantially uniform. A two-layer clad metal plate 40B can be obtained.

  Further, the tip 51B of the second scraper 5B comes into surface contact with the surface of the second metal layer 42 in the above operation. Therefore, the front end portion 51 </ b> B reliably contacts the surface of the second metal layer 42. Therefore, according to the device 10B, the above-described functions of the second scraper 5B can be more satisfactorily exhibited.

  Furthermore, since the surface of the second scraper 5B is covered with the protective material 532, 533, in the above operation, the temperature of the second molten metal 4B is prevented from being lowered, and the second molten metal 4B is prevented from flowing into the second scraper 5B. It is prevented from sticking to the surface of the film. Therefore, according to the apparatus 10B, the function which the 2nd scraper 5B mentioned above can be exhibited more favorably from this point, and also the production efficiency of the metal plate 40B can be improved.

  In addition, the other effect by the 1st scraper 5A is the same as the case of 1st Embodiment.

[Third Embodiment]
FIG. 7 is a schematic front sectional view showing a third embodiment of the metal plate manufacturing apparatus of the present invention. This apparatus 10C is an apparatus for producing a two-layer clad metal plate from two types of molten metal, and employs a twin roll method.

  The apparatus 10C includes a first roll 1, a second roll 2, a first pool 3A, and a second pool 3B.

  The first roll 1 has the same configuration as the first roll 1 of the first embodiment.

  The second roll 2 is disposed opposite to the first roll 1 in front of the first scraper 5A in the rotation direction (arrow R1 direction) of the first roll 1, and is directed toward the first roll 1 (ie, Energized (in the direction of arrow A). For example, the second roll 2 is spring-biased.

  Although the said 2nd roll 2 may be the same as the diameter of the 1st roll 1, since the smaller diameter roll is cheaper, the space for providing the 1st pool 3A and the 2nd pool 3B can be ensured widely. Therefore, a roll having a diameter smaller than that of the first roll 1 is employed. Moreover, the 2nd roll 2 is provided so that it may drive independently so that it may rotate in the opposite direction (arrow R2 direction) with respect to the 1st roll 1, and also both rolls 1 and 2 are the following. The peripheral speeds on the roll surfaces 11 and 21 are set to be the same. Specifically, this can be achieved by adopting a so-called twin drive system using two drive motors. Moreover, when both rolls 1 and 2 are the same diameter, it does not need to be provided so that it may drive independently, respectively. For this, a so-called single drive system can be adopted.

  Furthermore, the 2nd roll 2 has the cooling mechanism (not shown) for cooling the molten metal which contacted the surface 11 similarly to the 1st roll 1. FIG. As the cooling mechanism, a “water-cooled type” that exhibits cooling ability by circulating cooling water inside the roll is adopted, but other methods may be adopted. Further, as long as a cooling mechanism is provided outside the second roll 2, the cooling mechanism may not be provided inside the second roll 2.

  The first pool 3A has the same configuration as the first pool 3A of the first embodiment.

  The second pool 3B is surrounded by the surface 21 of the second roll 2, the first scraper 5A, both side members 32, and the surface 11 of the first roll 1 so that the molten metal can be stored. Yes.

  The first scraper 5A has the same configuration as the first scraper 5A of the first embodiment.

  The rear member 31 has the same configuration as the rear member 31 of the first embodiment.

  Both side members 32 have the same configuration as the both side members 32 of the first embodiment, but are expanded and provided so that both side walls of the second pool 3B can also be configured. Or you may employ | adopt the 1st roll 1 with a hook which showed the specific example in 1st Embodiment.

  Next, the operation of the apparatus 10C configured as described above will be described with reference to FIG. In FIG. 8, the illustration of both side members 32 is omitted. Further, the melting point of the second molten metal 4B poured into the second pool 3B is equal to or lower than the melting point of the first molten metal 4A poured into the first pool 3A.

  First, while pouring the first molten metal 4A into the first pool 3A (first pouring step) and pouring the second molten metal 4B into the second pool 3B (second pouring step), The apparatus 10B is activated. Then, the first roll 1 and the second roll 2 rotate at a predetermined speed, and the cooling function is activated. As a result, the first roll 1 cools the first molten metal 4A in the first pool 3A in contact with the surface 11 to form the first metal layer 41 in a semi-solid state or a solid state. It rotates with the metal layer 41 (first cooling step), and the second roll 2 cools the second molten metal 4B in the second pool 3B that is in contact with the surface 21 of the semi-solid state or It rotates with the second metal layer 42 while forming the solidified second metal layer 42 (second cooling step). The first metal layer 41 changes from the surface 11 side of the first roll 1 to the solidified state, and the second metal layer 42 changes from the surface 21 side of the second roll 2 to the solidified state. And change. Moreover, the circumferential distance L1 (FIG. 7) from the lower end edge 311 of the rear member 31 in the first roll 1 to the tip 51A of the first scraper 5A is a distance at which the first metal layer 41 having a semi-solid state can be formed. The circumferential distance L2 from the liquid level of the second pool 3B to the kiss point of both rolls 1 and 2 in the second roll 2 is formed by the second metal layer 42 having a semi-solid state. It is set to the distance that can be done.

  Then, when the first metal layer 41 moves with the rotation of the first roll 1 and exceeds the first scraper 5A, the second metal layer 42 that has moved with the rotation of the second roll 2 is The first metal layer 41 is brought into contact. The two metal layers 41 and 42 that are in contact with each other are joined by both rolls 1 and 2 and further cooled by both rolls 1 and 2 (finishing step).

  Thereby, the clad metal plate 40C formed by joining the first metal layer 401 formed by completely solidifying the first molten metal 4A and the second metal layer 402 formed by completely solidifying the second molten metal 4B is obtained. can get.

  By the way, when the first metal layer 41 having a semi-solid state exceeds the first scraper 5A, the tip 51A of the first scraper 5A continues to abut on the surface of the first metal layer 41 with a certain force (first 1 scraping step). Thereby, the semi-solid state surface of the first metal layer 41 is leveled while being scraped off, and the first metal layer 41 is adjusted to a constant thickness. Therefore, the second metal layer 42 is formed on the flat surface of the first metal layer 41. At this time, since the bondability in the finishing process is improved, the low solid phase portion of the semi-solid state surface of the first metal layer 41 is scraped, and the semi-solid state surface of the first metal layer 41 is low in fluidity. It should be in a semi-solid state.

  Therefore, according to the device 10C, the interface between the first metal layer 401 and the second metal layer 402 is clear, and the thickness distribution of the first metal layer 401 and the second metal layer 402 is substantially uniform. A layer of clad metal plate 40C can be obtained. In addition, that an interface is clear means the state in which there is no mixing and reaction of molten metal.

  Further, the tip 51A of the first scraper 5A makes surface contact with the surface of the first metal layer 41 in the above operation. Therefore, the tip portion 51 </ b> A reliably contacts the surface of the first metal layer 41. Therefore, according to the apparatus 10C, the above-described function of the first scraper 5A can be exhibited better.

  Further, by adjusting the urging force to the first scraper 5A, the solid phase ratio of the semi-solid state portion of the first metal layer 41 is adjusted, and the semi-solid state surface of the first metal layer 41 has a fluidity. Even if the pouring temperature of the second molten metal 4B having a low melting point is lower than the liquidus temperature of the first molten metal 4A having a high melting point, the molten metal and the like are mixed together. It is possible to obtain a good clad metal plate having a clear bonding interface without causing any reaction and having high adhesion at the bonding interface without generating a gap in the bonding interface. Accordingly, the second molten metal 4B having a low melting point can be poured even at a temperature higher than the liquidus of the second molten metal 4B but close to the liquidus, so that the second molten metal 4B does not absorb gas and is sound. And the second metal melt 4B is rapidly solidified to form a fine structure, so that the ductility of the resulting clad metal plate is excellent. In this case, the heat load on the first molten metal 4A having a high melting point and on both the rolls 1 and 2 is also reduced. Therefore, the burden on the cooling function of the apparatus can be reduced.

  Further, since the surface of the first scraper 5A is covered with the protective material 532, 533, in the above operation, the temperature drop of the first metal melt 4A and the second metal melt 4B is prevented, and the first metal melt It is prevented that 4A and the 2nd molten metal 4B adhere to the surface of the 1st scraper 5A. Therefore, according to the apparatus 10C, also from this point, the above-described function of the first scraper 5A can be exhibited more satisfactorily, and the production efficiency of the metal plate 40C can be improved.

[Fourth Embodiment]
FIG. 9 is a schematic front sectional view showing a fourth embodiment of the metal plate manufacturing apparatus of the present invention. This apparatus 10D is an apparatus for producing a three-layer clad metal plate from two or three types of molten metal, and employs a twin roll method.

  The apparatus 10D includes a first roll 1, a second roll 2, a first pool 3A, a second pool 3B, and a third pool 3C.

  The first roll 1 has the same configuration as the first roll 1 of the first embodiment.

  The 2nd roll 2 has the same structure as the 2nd roll 2 of 3rd Embodiment.

  The first pool 3A has the same configuration as the first pool 3A of the first embodiment.

  The second pool 3B is provided in front of the first scraper 5A, both side members 32, and the first scraper 5A in the rotational direction of the first roll 1 (arrow R1 direction) so that the molten metal can be stored. A second front plate (hereinafter referred to as “second scraper”) 5 </ b> B, a surface 11 of the first roll 1, and a surface 21 of the second roll 2 are surrounded.

  The third pool 3C is surrounded by the surface 21 of the second roll 2, the second scraper 5B, and both side members 32 so that the molten metal can be stored.

  The first scraper 5A has the same configuration as the first scraper 5A of the first embodiment.

  The second scraper 5B serves as both the front wall of the second pool 3B and the rear wall of the third pool 3C, and is provided by processing a plate. As shown in the cross-sectional view of FIG. 9, the first scraper 5 </ b> B has a bent form here, but may have a linear or arcuate form. The tip of the second scraper 5B is bent at an obtuse angle, and the tip is a tip 51B from the bent portion. And the 1st scraper 5B is provided so that the distance HB between the front-end | tip part 51B and the surface 21 of the 2nd roll 1 can change. Specifically, the second scraper 5B is supported at the base end portion 52B so as to be rotatable around the horizontal axis 521B (in the direction of the arrow Y), thereby making the distance HB variable. Further, the second scraper 5B is always urged so as to rotate in a direction (arrow Y2 direction) in which the distance HB decreases. Specifically, a weight 6B having a predetermined weight is connected to the base end portion 52B of the second scraper 5B via a string 61B, and the second scraper 5B is rotated in the arrow Y2 direction by the weight 6B. So that it is always pulled with a constant force. Thereby, the front-end | tip part 51B of the 2nd scraper 5B is always urged | biased by the fixed force toward the surface 21 of the 2nd roll 2. As shown in FIG. This constant force is a force corresponding to the hardness of the molten metal poured into the third pool 3C in the semi-solid state, and scrapes a portion of the semi-solid surface of the metal layer where the solid phase ratio is low. The force is enough to level the metal layer while removing it. The biasing of the second scraper 5B is performed by the force of the weight because the apparatus can be configured easily, but other mechanisms such as hydraulic pressure may be adopted.

  In order for the front end portion 51B of the second scraper 5B to come into surface contact with the metal layer, similarly to the first scraper 5A of the first embodiment, the back surface (roll side surface) of the second roll 2 and the front end portion 51B. It is necessary that the angle formed with the angle is less than 30 degrees, and more preferably the angle is 0, that is, parallel. The length of the tip 51B is preferably 5 mm or more and 30 mm or less, and preferably 10 mm or more and 20 mm or less. This is because if the length of the tip 51B is too short, the effect of surface contact is weakened, and if it is too long, the solidified product may be deposited on the extended tip. The back surface of the tip 51B is preferably a flat surface, but may be a convex surface having a large radius of curvature within a range that does not substantially impair the flatness.

  Moreover, the 2nd scraper 5B employ | adopts the structure by which the surface of the core material 531 was doubly covered with two types of protective materials 532 and 533 similarly to the 1st scraper 5A (FIG. 3).

  The rear member 31 has the same configuration as the rear member 31 of the first embodiment.

  Both side members 32 have the same configuration as the both side members 32 of the first embodiment, but are expanded and provided so that both side walls of the second pool 3B and the third pool 3C can also be configured. Yes. Or you may employ | adopt the 1st roll 1 with a hook which showed the specific example in 1st Embodiment.

  Next, the operation of the apparatus 10D configured as described above will be described with reference to FIG. In FIG. 10, the illustration of both side members 32 is omitted. Further, the melting point of the second molten metal 4B poured into the second pool 3B is equal to or lower than the melting point of the first molten metal 4A poured into the first pool 3A, and the third molten metal poured into the third pool 3C. The melting point of the molten metal 4C is equal to or higher than the melting point of the second molten metal 4B. The first molten metal 4A and the third molten metal 4C may be the same.

  First, while pouring the first molten metal 4A into the first pool 3A (first pouring step) and pouring the second molten metal 4B into the second pool 3B (second pouring step), And the apparatus 10C is started, pouring the 3rd metal molten metal 4C into the 3rd pool 3C (3rd pouring process). Then, the first roll 1 and the second roll 2 rotate at a predetermined speed and the cooling function is activated. As a result, the first roll 1 cools the first molten metal 4A in the first pool 3A in contact with the surface 11 to form the first metal layer 41 in a semi-solid state or a solid state. It rotates with the metal layer 41 (first cooling step), and the second roll 2 cools the third molten metal 4C in the third pool 3C that is in contact with the surface 21 of the semi-solid state or It rotates with the third metal layer 43 while forming the solidified third metal layer 43 (second cooling step). The first metal layer 41 changes from the surface 11 side of the first roll 1 to the solidified state, and the third metal layer 43 changes from the surface 21 side of the second roll 2 to the solidified state. And change. Further, the circumferential distance L1 (FIG. 9) from the lower end edge 311 of the rear member 31 in the first roll 1 to the tip 51A of the first scraper 5A can form the first metal layer 41 having a semi-solidified surface. The circumferential distance L3 from the liquid level of the third pool 3C in the second roll 2 to the kiss point of both rolls 1 and 2 is the third metal layer 43 having a semi-solidified surface. Is set to a distance that can be formed.

  When the first metal layer 41 moves with the rotation of the first roll 1 and exceeds the first scraper 5A, the second molten metal 4B in the second pool 3B comes into contact with the first metal layer 41. Thus, the first metal layer 41 is heated to a temperature at which metal bonding is possible, and the second molten metal 4B itself is cooled. As a result, a second metal layer 421 in a semi-solid state of the second metal melt 4B is formed on the surface of the first metal layer 41, and the second metal layer 421 is moved along with the rotation of the first roll 1 to the first metal layer 421. It moves with the metal layer 41. On the other hand, when the third metal layer 43 moves with the rotation of the second roll 2 and exceeds the second scraper 5B, the second molten metal 4B in the second pool 3B comes into contact with the third metal layer 43. Then, the third metal layer 43 is heated to a temperature at which metal bonding can be performed, and the second molten metal 4B itself is cooled. As a result, a second metal layer 422 in a semi-solid state of the second molten metal 4B is formed on the surface of the third metal layer 43, and the second metal layer 422 is in contact with the third roll 2 as the second roll 2 rotates. It moves with the metal layer 43. In addition, the circumferential distance L2 from the tip 51A of the first scraper 5A in the first roll 1 to the kiss points of both rolls 1 and 2 is a distance at which the second metal layers 421 and 422 in a semi-solid state can be formed. Is set.

  As the rolls 1 and 2 rotate, the second metal layer 421 and the second metal layer 422 come into contact with each other, and the first metal layer 41, the second metal layer 421, the second metal layer 422, The three metal layers 43 are joined by both rolls 1 and 2 and further cooled by both rolls 1 and 2 (finishing step).

  As a result, the first metal layer 401 in which the first molten metal 4A is completely solidified, the second metal layer 402 in which the second molten metal 4B is completely solidified, and the third molten metal 4C are completely solidified. A clad metal plate 40D formed by joining the third metal layer 403 is obtained.

  By the way, when the first metal layer 41 exceeds the first scraper 5A, the tip 51A of the first scraper 5A continues to abut on the surface of the first metal layer 41 with a certain force (first scraping step). Thereby, the semi-solid state surface of the first metal layer 41 is leveled while being scraped off, and the first metal layer 41 is adjusted to a constant thickness. Therefore, the second metal layer 421 is formed on the flat surface of the first metal layer 41.

  On the other hand, when the third metal layer 43 exceeds the second scraper 5B, the tip 51B of the second scraper 5B continues to contact the surface of the third metal layer 43 with a constant force (second scraping step). Thereby, the semi-solid state surface of the third metal layer 43 is leveled while being scraped off, and the third metal layer 43 is adjusted to a constant thickness. Therefore, the second metal layer 422 is formed on the flat surface of the third metal layer 43. At this time, since the bondability in the finishing process is improved, the low solid phase portion of the semi-solidified surface of the first metal layer 41 and the third metal layer 43 is scraped, and the semi-solidified state of the two metal layers 41 and 43 is obtained. The surface should be in a semi-solid state with low fluidity.

Therefore, according to the device 10D, the interfaces between the first metal layer 401, the second metal layer 402, and the third metal layer 403 are clear, and the first metal layer 401, the second metal layer 402, and the first metal layer 401, A three-layer clad metal plate 40D having a substantially uniform thickness distribution of the three metal layers 403 can be obtained.
In addition, since the interface between the metal layers is clear, a good clad metal plate can be obtained even if the melting point of the second molten metal 4B is lower than the melting points of the first molten metal 4A and the third molten metal 4C.

  Further, the tip 51B of the second scraper 5B is in surface contact with the surface of the third metal layer 43 in the above operation. Therefore, the front end portion 51 </ b> B reliably contacts the surface of the third metal layer 43. Therefore, according to the apparatus 10D, the above-described function of the second scraper 5B can be more satisfactorily exhibited.

  Further, by adjusting the biasing force to the first scraper 5A, the solid fraction of the semi-solidified portion of the first metal layer 41 and the third metal layer 43 is adjusted, and the semi-solid state surfaces of both metal layers are adjusted. When the temperature of pouring of the second molten metal 4B having a low melting point is made lower than the liquidus temperatures of the first molten metal 4A and the third molten metal 4C having a high melting point by maintaining a semi-solid state with low fluidity. In this case, it is possible to obtain a good clad metal plate in which the bonding interface is clear without mixing or reacting with each other and the bonding interface has no gap and the adhesion at the bonding interface is high. . Accordingly, the second molten metal 4B having a low melting point can be poured even at a temperature higher than the liquidus of the second molten metal 4B but close to the liquidus, so that the second molten metal 4B does not absorb gas and is sound. And the second metal melt 4B is rapidly solidified to form a fine structure, so that the ductility of the resulting clad metal plate is excellent. In this case, the heat loads on the first molten metal 4A and the third molten metal 4C having a high melting point and on both the rolls 1 and 2 are also reduced. Therefore, the burden on the cooling function of the apparatus can be reduced.

  Furthermore, since the surface of the second scraper 5B is covered with the protective materials 532 and 533, in the above operation, the temperature drop of the second metal melt 4B and the third metal melt 4C is prevented, and the second metal melt It is prevented that 4B and the 3rd metal molten metal 4C adhere to the surface of the 2nd scraper 5B. Therefore, according to the apparatus 10D, also from this point, the above-described function of the second scraper 5B can be exhibited more satisfactorily, and the production efficiency of the metal plate 40D can be improved.

  In addition, the other effect by the 1st scraper 5A is the same as the case of 3rd Embodiment.

[Fifth Embodiment]
FIG. 11 is a schematic front sectional view showing a fifth embodiment of the metal plate manufacturing apparatus of the present invention. This apparatus 10E is an apparatus for manufacturing a four-layer clad metal plate from three or four types of molten metal, and employs a twin roll method.

  The device 10E includes a first roll 1, a second roll 2, a first pool 3A, a second pool 3B, a third pool 3C, and a fourth pool 3D.

  The first roll 1 has the same configuration as the first roll 1 of the first embodiment.

  The 2nd roll 2 has the same structure as the 2nd roll 2 of 3rd Embodiment.

  The first pool 3A has the same configuration as the first pool 3A of the first embodiment.

  The second pool 3B is provided in front of the first scraper 5A, both side members 32, and the first scraper 5A in the rotational direction of the first roll 1 (arrow R1 direction) so that the molten metal can be stored. A second front plate (hereinafter referred to as “second scraper”) 5 </ b> B and the surface 11 of the first roll 1 are surrounded.

  The third pool 3C is provided in front of the second scraper 5B, both side members 32, and the second scraper 5B in the rotational direction of the first roll 1 (arrow R1 direction) so that the molten metal can be stored. A third front plate (hereinafter referred to as “third scraper”) 5 </ b> C, the surface 11 of the first roll 1, and the surface 21 of the second roll 2 are surrounded.

  The fourth pool 3D is surrounded by the surface 21 of the second roll 2, the third scraper 5C, and both side members 32 so that the molten metal can be stored.

  The first scraper 5A has the same configuration as the first scraper 5A of the first embodiment.

  The second scraper 5B has the same configuration as the first scraper 5A.

  The third scraper 5C has the same configuration as the second scraper 5B of the fourth embodiment. A weight 6C is connected to the third scraper 5C via a string 61C.

  The rear member 31 has the same configuration as the rear member 31 of the first embodiment.

  Both side members 32 have the same configuration as both side members 32 of the first embodiment, but both side walls of the second pool 3B, the third pool 3C, and the fourth pool 3D can also be configured. It has been expanded. Or you may employ | adopt the 1st roll 1 with a hook which showed the specific example in 1st Embodiment.

  The apparatus 10E having the above-described configuration operates as follows. The melting point of the second metal melt 4B poured into the second pool 3B is equal to or lower than the melting point of the first metal melt 4A poured into the first pool 3A, and the third molten metal poured into the third pool 3C. The melting point of the molten metal 4C is not more than the melting point of the second molten metal 4B, and the melting point of the fourth molten metal 4D poured into the fourth pool 3D is not less than the melting point of the third molten metal 4C. The first molten metal 4A and the fourth molten metal 4D may be the same.

  First, while pouring the first metal melt 4A into the first pool 3A, while pouring the second metal melt 4B into the second pool 3B, and the third metal melt 4C into the third pool 3C. The apparatus 10E is activated while hot water is poured and the fourth molten metal 4D is poured into the fourth pool 3D. Then, the first roll 1 and the second roll 2 rotate at a predetermined speed, and the cooling function is activated. As a result, the first roll 1 cools the first molten metal 4A in the first pool 3A in contact with the surface 11 to form the first metal layer 41 in a semi-solid state or a solid state. The fourth metal rotates with the metal layer 41, and the second roll 2 cools the fourth metal melt 4D in the fourth pool 3D that is in contact with the surface 21 to be in a semi-solid state or a solid state. Rotate with the fourth metal layer 44 while forming the layer 44. The first metal layer 41 changes from the surface 11 side of the first roll 1 to the solidified state, and the fourth metal layer 44 changes from the surface 21 side of the second roll 2 to the solidified state. And change. Moreover, the circumferential distance L1 (FIG. 11) from the lower end edge 311 of the rear member 31 in the 1st roll 1 to the front-end | tip part 51A of the 1st scraper 5A can form the 1st metal layer 41 which has a semi-solidified surface. The circumferential distance L4 from the liquid level of the fourth pool 3D in the second roll 2 to the kiss points of both rolls 1 and 2 is the fourth metal layer 44 having a semi-solidified surface. Is set to a distance that can be formed.

  When the first metal layer 41 moves with the rotation of the first roll 1 and exceeds the first scraper 5A, the second molten metal 4B in the second pool 3B comes into contact with the first metal layer 41. Thus, the first metal layer 41 is heated to a temperature at which metal bonding is possible, and the second molten metal 4B itself is cooled. As a result, a second metal layer 42 in a semi-solid state of the second molten metal 4B is formed on the surface of the first metal layer 41, and the second metal layer 42 is moved along with the rotation of the first roll 1 to the first metal layer 42. It moves with the metal layer 41. Note that the circumferential distance L2 (FIG. 11) from the tip 51A of the first scraper 5A to the tip 51B of the second scraper 5B in the first roll 1 is the distance at which the semi-solidified second metal layer 42 can be formed. Is set.

  When the second metal layer 42 moves with the rotation of the first roll 1 and exceeds the second scraper 5B, the third molten metal 4C in the third pool 3C comes into contact with the second metal layer 42. Then, the second metal layer 42 is heated to a temperature at which metal bonding can be performed, and the third molten metal 4C itself is cooled. As a result, a third metal layer 431 in a semi-solid state of the third molten metal 4C is formed on the surface of the second metal layer 42, and the third metal layer 431 is in contact with the second roll 1 as the second roll 1 rotates. It moves with the metal layer 42.

  On the other hand, when the fourth metal layer 44 moves with the rotation of the second roll 2 and exceeds the third scraper 5C, the third metal melt 4C in the third pool 3C comes into contact with the fourth metal layer 44. Then, the fourth metal layer 44 is heated to a temperature at which metal bonding can be performed, and the third molten metal 4C itself is cooled. As a result, a third metal layer 432 in a semi-solid state of the third molten metal 4C is formed on the surface of the fourth metal layer 44, and the third metal layer 432 is in contact with the rotation of the second roll 2 in the fourth state. It moves with the metal layer 44. The circumferential distance L3 (FIG. 9) from the tip 51B of the second scraper 5B in the first roll 1 to the kiss points of both rolls 1 and 2 is formed by the semi-solidified third metal layers 431 and 432. The distance to get is set.

  As the rolls 1 and 2 rotate, the third metal layer 431 and the third metal layer 432 come into contact with each other, and the first metal layer 41, the second metal layer 42, the third metal layer 431, The third metal layer 432 and the fourth metal layer 44 are joined by both rolls 1 and 2 and further cooled by both rolls 1 and 2.

  As a result, the first metal layer 401 in which the first molten metal 4A is completely solidified, the second metal layer 402 in which the second molten metal 4B is completely solidified, and the third molten metal 4C are completely solidified. A clad metal plate 40E obtained by joining the third metal layer 403 and the fourth metal layer 404 obtained by completely solidifying the fourth metal melt 4D is obtained.

  By the way, when the first metal layer 41 exceeds the first scraper 5A, the tip 51A of the first scraper 5A continues to abut on the surface of the first metal layer 41 with a constant force. Thereby, the semi-solid state surface of the first metal layer 41 is leveled while being scraped off, and the first metal layer 41 is adjusted to a constant thickness. Therefore, the second metal layer 42 is formed on the flat surface of the first metal layer 41.

  Further, when the second metal layer 42 exceeds the second scraper 5B, the tip 51B of the second scraper 5B continues to abut on the surface of the second metal layer 42 with a certain force. As a result, the semi-solid state surface of the second metal layer 42 is leveled while being scraped off, and the second metal layer 42 is adjusted to a constant thickness. Therefore, the third metal layer 431 is formed on the flat surface of the second metal layer 42.

  On the other hand, when the fourth metal layer 44 exceeds the third scraper 5C, the tip 51C of the third scraper 5C continues to abut on the surface of the fourth metal layer 44 with a certain force. As a result, the semi-solid state surface of the fourth metal layer 44 is leveled while being scraped off, and the fourth metal layer 44 is adjusted to a constant thickness. Therefore, the third metal layer 432 is formed on the flat surface of the fourth metal layer 44.

  Therefore, according to the device 10E, the interfaces of the first metal layer 401, the second metal layer 402, the third metal layer 403, and the fourth metal layer 404 are clear, and the first metal layer 401 and the second metal layer 404 are clear. A four-layer clad metal plate 40E having a substantially uniform thickness distribution of the layer 402, the third metal layer 403, and the fourth metal layer 404 can be obtained.

  In addition, the 1st scraper 5A and the 2nd scraper 5B exhibit the effect similar to the 1st scraper 5A of the said embodiment. Moreover, the 3rd scraper 5C exhibits the effect similar to the 2nd scraper 5B of 4th Embodiment.

[Sixth Embodiment]
FIG. 12 is a schematic front sectional view showing a sixth embodiment of the metal plate manufacturing apparatus of the present invention. This apparatus 10F is an apparatus for producing a three-layer clad metal plate from two or three types of molten metal, and employs a twin roll method.

  The apparatus 10F includes a first roll 1, a second roll 2, a first pool 3A, a second pool 3B, and a third pool 3C.

  The 1st roll 1 and the 2nd roll 2 have the same magnitude | size, and are arrange | positioned facing in the horizontal direction. The first roll 1 is provided so as to rotate clockwise (in the direction of arrow R1) in the drawing, and the second roll 2 is rotated counterclockwise (in the direction of arrow R2) in the drawing. Is provided.

  The first roll 1 has a cooling mechanism (not shown) for cooling the molten metal in contact with the surface 11, and rotates while cooling the molten metal in contact with the surface 11. Yes. Accordingly, the first roll 1 rotates with the metal layer while forming a metal layer in a semi-solid state or a solid state of the molten metal, and the metal layer is completely solidified while rotating. As the cooling mechanism, for example, a “water-cooled type” that exhibits a cooling function by circulating cooling water inside the roll is preferable. The second roll 2 also has the same configuration and function as the first roll 1.

  The first pool 3 </ b> A has a first front plate (hereinafter referred to as “first”) that is positioned in front of the surface 11 of the first roll 1 and the rotation direction (arrow R <b> 1) of the first roll 1 so that the molten metal can be stored. 5A, a rear member 31A located behind the first roll 1 in the rotation direction, and both side members (not shown).

  The rear member 31A has the same configuration as the rear member 31 of the first embodiment.

  The first scraper 5A has the same configuration as the first scraper 5A of the first embodiment.

  The third pool 3C has a second front plate (hereinafter referred to as “second”) that is located in front of the surface 21 of the second roll 2 and the rotation direction (arrow R2 direction) of the second roll 2 so that the molten metal can be stored. (Referred to as “scraper”) 5B, a rear member 31B located behind the second roll 2 in the rotational direction, and both side members (not shown). The third pool 3C has a right / left target structure with respect to the first pool 3A. The second scraper 5B is the same as the second scraper 5B of the fourth embodiment.

  The second pool 3B includes a surface 11 of the first roll 1, a surface 21 of the second roll 2, a first scraper 5A, a second scraper 5B, and both side members so that the molten metal can be stored. (Not shown).

  Both side members have the same configuration as the both side members 32 of the first embodiment, but are expanded and provided so that both side walls of the second pool 3B and the third pool 3C can also be configured. Yes.

  The apparatus 10F having the above configuration operates as follows. The melting point of the second metal melt 4B poured into the second pool 3B is equal to or lower than the melting point of the first metal melt 4A poured into the first pool 3A, and the third molten metal poured into the third pool 3C. The melting point of the molten metal 4C is equal to or higher than the melting point of the second molten metal 4B. The first molten metal 4A and the third molten metal 4C may be the same.

  First, while pouring the first metal melt 4A into the first pool 3A, while pouring the second metal melt 4B into the second pool 3B, and the third metal melt 4C into the third pool 3C. The apparatus 10F is started up with hot water. Then, the first roll 1 and the second roll 2 rotate at a predetermined speed, and the cooling function is activated. As a result, the first roll 1 cools the first molten metal 4A in the first pool 3A in contact with the surface 11 to form the first metal layer 41 in a semi-solid state or a solid state. The third metal that rotates with the metal layer 41 and the second roll 2 cools the third molten metal 4C in the third pool 3C that is in contact with the surface 21 thereof and is in a semi-solid state or a solid state. Rotate with the third metal layer 43 while forming the layer 43. The first metal layer 41 changes from the surface 11 side of the first roll 1 to the solidified state, and the third metal layer 43 changes from the surface 21 side of the second roll 2 to the solidified state. And change. Further, the circumferential distance L1 (FIG. 12) from the lower end edge 311A of the rear member 31A of the first roll 1 to the tip 51A of the first scraper 5A can form the first metal layer 41 having a semi-solid state surface. The circumferential distance L3 (FIG. 12) from the lower end edge 311B of the rear member 31B of the second roll 2 to the tip 51B of the second scraper 5B in the second roll 2 is a semi-solidified surface. The distance at which the three metal layers 43 can be formed is set.

  When the first metal layer 41 moves with the rotation of the first roll 1 and exceeds the first scraper 5A, the second molten metal 4B in the second pool 3B comes into contact with the first metal layer 41. Thus, the first metal layer 41 is heated to a temperature at which metal bonding is possible, and the second molten metal 4B itself is cooled. On the other hand, when the third metal layer 43 moves with the rotation of the second roll 2 and exceeds the second scraper 5B, the second molten metal 4B in the second pool 3B comes into contact with the third metal layer 43. Then, the third metal layer 43 is heated to a temperature at which metal bonding can be performed, and the second molten metal 4B itself is cooled. Thereby, the second metal layer 42 in a semi-solid state of the second molten metal 4B is formed between the first metal layer 41 and the third metal layer 43. The circumferential distance L2 from the tip 51A of the first scraper 5A in the first roll 1 to the kiss points of both rolls 1 and 2 is set to a distance at which the second metal layer 42 in a semi-solid state can be formed. ing. The circumferential distance L2 in the second roll 2 is also the same.

  The second metal layer 42 moves together with the first metal layer 41 and the third metal layer 43 as the rolls 1 and 2 rotate, and the first metal layer 41, the second metal layer 42, The three metal layers 43 are joined by both rolls 1 and 2 and further cooled by both rolls 1 and 2.

  As a result, the first metal layer 401 in which the first molten metal 4A is completely solidified, the second metal layer 402 in which the second molten metal 4B is completely solidified, and the third molten metal 4C are completely solidified. A clad metal plate 40F formed by joining the third metal layer 403 is obtained.

  By the way, when the first metal layer 41 exceeds the first scraper 5A, the tip 51A of the first scraper 5A continues to abut on the surface of the first metal layer 41 with a constant force. Thereby, the semi-solid state surface of the first metal layer 41 is leveled while being scraped off, and the first metal layer 41 is adjusted to a constant thickness. Therefore, the second metal layer 42 is formed on the flat surface of the first metal layer 41.

  Further, when the third metal layer 43 exceeds the second scraper 5B, the tip 51B of the second scraper 5B continues to abut on the surface of the third metal layer 43 with a constant force. Thereby, the semi-solid state surface of the third metal layer 43 is leveled while being scraped off, and the third metal layer 43 is adjusted to a constant thickness. Therefore, the second metal layer 42 is formed on the flat surface of the third metal layer 43.

  Therefore, according to the device 10F, the interfaces of the first metal layer 401, the second metal layer 402, and the third metal layer 403 are clear, and the first metal layer 401, the second metal layer 402, and the first metal layer 401, A three-layer clad metal plate 40F having a substantially uniform thickness distribution of the three metal layers 403 can be obtained.

[Seventh Embodiment]
FIG. 13 is a schematic front sectional view showing a seventh embodiment of the metal plate manufacturing apparatus of the present invention. This apparatus 10G is an apparatus for producing a five-layer clad metal plate from three or four types of molten metal.

  The apparatus 10G includes a first roll 1, a second roll 2, a first pool 3A, a second pool 3B, and a third pool 3C, a lower apparatus section FA, a third roll 6, a fourth roll 7, and And an upper device unit FB including the fourth pool 3D.

  The lower device section FA has the same configuration as the device 10F of the sixth embodiment.

  In the upper device part FB, the third roll 6 and the fourth roll 7 have the same size, but they may not be, and are arranged to face each other in the horizontal direction. It does not have to be. The third roll 6 is provided so as to rotate clockwise (in the direction of the arrow R1) in the drawing, and the fourth roll 7 rotates counterclockwise (in the direction of the arrow R2) in the drawing. Is provided. Although the 3rd roll 6 and the 4th roll 7 are arranged so that the gap 81 between both rolls 6 and 7 may be located just above the width direction center of the 2nd roll 2 of lower device part FA, By using a guide or the like, it does not have to be arranged directly above.

  The third roll 6 has a cooling mechanism (not shown) for cooling the molten metal in contact with the surface 61, and rotates while cooling the molten metal in contact with the surface 61. Yes. Therefore, the third roll 6 rotates with the metal layer while forming a semi-solid or solid state metal layer of the molten metal, and completely solidifies the metal layer while rotating. As the cooling mechanism, for example, a “water-cooled type” that exhibits a cooling function by circulating cooling water inside the roll is preferable. The fourth roll 7 also has the same configuration and function as the third roll 6.

  The fourth pool 3D is surrounded by the surface 61 of the third roll 6, the surface 71 of the fourth roll 7, and both side members (not shown) so that the molten metal can be stored.

  The apparatus 10G having the above-described configuration operates as follows. The melting point of the second metal melt 4B poured into the second pool 3B is equal to or lower than the melting point of the first metal melt 4A poured into the first pool 3A, and the third molten metal poured into the third pool 3C. The melting point of the molten metal 4C is equal to or higher than the melting point of the second molten metal 4B, and the melting point of the fourth molten metal 4D poured into the fourth pool 3D is equal to or higher than the melting point of the second molten metal 4B. The first molten metal 4A, the third molten metal 4C, and the fourth molten metal 4D may be the same.

  First, while pouring the first metal melt 4A into the first pool 3A, while pouring the second metal melt 4B into the second pool 3B, and the third metal melt 4C into the third pool 3C. The apparatus 10G is activated while hot water is poured and the fourth molten metal 4D is poured into the fourth pool 4C. Then, all the rolls 1, 2, 6, and 7 each rotate at a predetermined speed, and the cooling function is activated. As a result, the first roll 1 cools the first molten metal 4A in the first pool 3A in contact with the surface 11 to form the first metal layer 41 in a semi-solid state or a solid state. The third metal that rotates with the metal layer 41 and the second roll 2 cools the third molten metal 4C in the third pool 3C that is in contact with the surface 21 thereof and is in a semi-solid state or a solid state. Rotate with the third metal layer 43 while forming the layer 43. On the other hand, the third roll 6 and the fourth roll 7 cool the fourth metal melt 4D in the fourth pool 3D that is in contact with the surfaces 61 and 71, and the fourth metal layer 44 is in a semi-solid state. Rotate with the fourth metal layer 44 while forming. Note that the circumferential distance L4 from the liquid level of the third pool 3C to the kiss point of both rolls 6 and 7 in both rolls 6 and 7 is set to a distance at which the semi-solidified fourth metal layer 44 can be formed. ing. The fourth metal layer 44 is joined by both rolls 6 and 7.

  On the other hand, when the first metal layer 41 moves with the rotation of the first roll 1 and exceeds the first scraper 5A, the second molten metal 4B in the second pool 3B comes into contact with the first metal layer 41. Thus, the first metal layer 41 is heated to a temperature at which metal bonding is possible, and the second molten metal 4B itself is cooled. Thereby, the second metal layer 421 in a semi-solid state is formed and moves together with the first metal layer 41 as the first roll 1 rotates.

  When the third metal layer 43 moves with the rotation of the second roll 2 and exceeds the second scraper 5B, the third molten metal 4C in the third pool 3C comes into contact with the third metal layer 43. Then, the third metal layer 43 is heated to a temperature at which metal bonding can be performed, and the second molten metal 4B itself is cooled. Thereby, the second metal layer 422 in a semi-solid state is formed and moves together with the third metal layer 43 as the second roll 2 rotates.

  On the other hand, the fourth metal layer 44 moves downward as the rolls 6 and 7 rotate, passes through the second pool 3B, and reaches between the second metal layer 421 and the second metal layer 422. .

  The fourth metal layer 44 heats the second metal layer 421 and the second metal layer 422 to a temperature at which metal bonding can be performed, and the fourth metal layer 44 itself is cooled. As a result, the first metal layer 41, the second metal layer 421, the fourth metal layer 44, the second metal layer 422, and the third metal layer 43 move together and are joined by both rolls 1 and 2. At the same time, it is further cooled by both rolls 1 and 2.

  As a result, the first metal layer 401 in which the first molten metal 4A is completely solidified, the second metal layer 402 in which the second molten metal 4B is completely solidified, and the fourth molten metal 4D are completely solidified. Clad metal formed by joining the third metal layer 403, the fourth metal layer 404 formed by completely solidifying the second molten metal 4B, and the fifth metal layer 405 formed by completely solidifying the third molten metal 4C. A plate 40G is obtained.

  By the way, when the first metal layer 41 exceeds the first scraper 5A, the tip 51A of the first scraper 5A continues to abut on the surface of the first metal layer 41 with a constant force. Thereby, the semi-solid state surface of the first metal layer 41 is leveled while being scraped off, and the first metal layer 41 is adjusted to a constant thickness. Therefore, the second metal layer 421 is formed on the flat surface of the first metal layer 41.

  Further, when the third metal layer 43 exceeds the second scraper 5B, the tip 51B of the second scraper 5B continues to abut on the surface of the third metal layer 43 with a constant force. Thereby, the semi-solid state surface of the third metal layer 43 is leveled while being scraped off, and the third metal layer 43 is adjusted to a constant thickness. Therefore, the second metal layer 422 is formed on the flat surface of the third metal layer 43.

  Therefore, according to the device 10G, the interfaces of the first metal layer 401, the second metal layer 402, the third metal layer 403, the fourth metal layer 404, and the fifth metal layer 405 are clear, and the first It is possible to obtain a five-layer clad metal plate 40G having a substantially uniform thickness distribution of the metal layer 401, the second metal layer 402, the third metal layer 403, the fourth metal layer 404, and the fifth metal layer 405. it can.

[Another embodiment]
(1) The mechanism for biasing the scraper is not limited to a mechanism using a weight, and may be a hydraulic mechanism, for example.
(2) The scraper is manufactured by bending a plate because it is easy to manufacture, but if it can constitute the wall of the molten metal pool and can be provided with a tip, other members But you can.
(3) The scraper may be composed of only a core material. However, the material of the scraper in that case needs to be non-reactive with the molten metal. Specific materials include alumina fiber, zonolite calcium silicate, calcium silicate, and the like.

[First embodiment]
This example corresponds to the first embodiment shown in FIGS. The implementation conditions in the present example are as follows.

(Implementation conditions)
・ First roll 1
-Roll shell material: SS400
・ Roll diameter: 1500mm
・ Roll width W1 (Fig. 2) ... 50mm
-Metal plate cooling rate: 100 ° C / second or more-First metal melt 4A
Material: 6022 alloy (Al—Si alloy); melting point 655 ° C.
・ Pouring temperature: 680 ℃
・ First scraper 5A
-Form: having a bent form as shown in the schematic cross-sectional view of FIG. 1.-Material: steel sheet covered with silica cloth and further covered with alumina silica cloth-Length of tip 51A ... 1.5 cm
・ Weight 6A ... 0.5kg
-Rotational speed (peripheral speed) of the first roll 1 ... 20 m / min-Solidification distance L1 ... 110 mm

  The solidification distance L1 is a circumferential distance from the lower end edge 311 of the rear member 31 to the tip 51A of the first scraper 5A.

(result)
(1) The surface of the obtained thin plate was observed. As a result, the surface was smooth and the plate thickness distribution was so uniform that it could be rolled.
(2) About the obtained thin plate, the "180 degree bending test" and the "tensile test" were done.
(2-1) 180 degree bending test ・ The obtained thin plate is bent in the direction of 0 degree with respect to the casting direction (the rotation direction of the first roll 1), and the presence or absence of cracks is investigated on the front and back surfaces of the thin plate. did. As a result, no cracks were found on either side.
The obtained thin plate was bent at 90 degrees with respect to the casting direction, and the presence or absence of cracks was investigated on the front and back surfaces of the thin plate. As a result, no cracks were found on either side.
(2-2) Tensile test-The obtained thin plate was cold-rolled to a thickness of 1 mm, annealed at 430 ° C for 1 hour, quenched in water, and treated with T4. The test piece shape was a No. 7 test piece. “Tensile strength”, “0.2% proof stress”, and “elongation” were measured. As a result, the “tensile strength” was 248 MPa, the “0.2% yield strength” was 115 MPa, and the “elongation” was 32%. This could withstand use as an automobile body panel material.

(Modification)
When the pouring temperature was set to 665 ° C., which is near the liquidus temperature of 655 ° C. of the 6022 alloy, the same results were obtained.

[Second Embodiment]
This example corresponds to the fourth embodiment shown in FIGS. 9 and 10. The implementation conditions in the present example are as follows.

(Implementation conditions)
・ First roll 1
-Roll shell material: SS400
・ Roll diameter: 1500mm
・ Roll width W1 ... 50mm
-Metal plate cooling rate: 100 ° C / second or more-Second roll 2
・ Roll shell material… Copper ・ Roll diameter… 250mm
・ Roll width W1 ... 50mm
・ Spring load ... 18N
-Metal plate cooling rate: 100 ° C / second or more-First metal melt 4A
Material: 3M01 alloy (Al-Mn alloy);
Solidus temperature: 628 ° C, liquidus temperature: 655 ° C
-Pouring temperature: 700 ° C
・ Second metal melt 4B
Material: 4045 alloy (Al-Si alloy);
Solidus temperature: 577 ° C, liquidus temperature: 590 ° C
-Pouring temperature: 610 ° C
・ 3rd metal melt 4C
Material: 3M01 alloy (Al-Mn alloy);
Solidus temperature: 628 ° C, liquidus temperature: 655 ° C
-Pouring temperature: 750 ° C
-1st scraper 5A and 2nd scraper 5B
-Form: having a bent form as shown in the schematic cross-sectional view of FIG. 9-Material: steel plate covered with silica cloth and further covered with alumina silica cloth-Length of tip portions 51A and 51B ... 1 .5cm
・ Weight 6A ... 0.5kg
・ Weight 6B ... 0.5kg
-Rotational speed (peripheral speed) of the first roll 1 and the second roll 2 ... 20 m / min-Solidification distance L1 ... 110 mm
・ Coagulation distance L2 ... 100mm
-Solidification distance L3 ... 80mm

  The solidification distance L1 is a circumferential distance from the lower end edge 311 of the rear member 31 to the tip 51A of the first scraper 5A. The solidification distance L2 is a circumferential distance from the tip 51A of the first scraper 5A to the kiss points of both rolls 1 and 2. The solidification distance L3 is a circumferential distance from the liquid level of the third pool 3C to the tip 51B of the second scraper 5B.

(result)
The interface of the obtained thin plate was observed. As a result, no mixing or reaction of molten metal was found at each interface between the first metal layer, the second metal layer, and the third metal layer. That is, both interfaces were clear.

  It should be noted that the joining was possible even when the molten metal temperature of the second molten metal 4B was lower than the liquidus temperature and lower than the solidus temperature of the first molten metal 4A and the third molten metal 4C. is there. This is because the surfaces of the first metal layer 41 and the third metal layer 43 after being scraped by the scraper are in a semi-solidified state with low fluidity. Therefore, the clad metal plate obtained in the second example has a clear joint surface between the third metal layer 403 and the second metal layer 402 as shown in FIG. The bonding surface between 401 and the second metal layer 402 is also clear. This effect was made possible for the first time not only by the scraper smoothing the surface of the metal layer but also by adjusting the solid phase ratio of the surface of the metal layer to make it a semi-solid state with low fluidity. And is a feature of the present invention. On the other hand, when the surfaces of the first metal layer 41 and the third metal layer 43 after being scraped by the scraper are in a solid phase, as shown in FIG. 15, the third metal layer 503 and A gap 600 was formed on the joint surface with the second metal layer 502.

(Modification)
When the molten metal 4B was poured at a temperature of 595 ° C. near the liquidus temperature 590 ° C. of the 4055 alloy, the same results were obtained.

  It should be noted that the second metal melt 4B can be joined even at a low pouring temperature near the liquidus temperature of the alloy. Thus, since the pouring temperature of the second molten metal 4B is low, the second molten metal 4B maintains soundness without absorbing gas, and the second molten metal 4B is rapidly cooled and solidified to form a fine structure. As a result, the ductility of the resulting clad metal plate is improved. There is also an advantage that the burden on the cooling function of the apparatus can be reduced.

  Since the metal plate manufacturing apparatus and the metal plate manufacturing method of the present invention can manufacture a single-layer metal plate or a multi-layer clad metal plate at a low cost with a reduced number of processes, the industrial utility value is great.

    1, 2 Roll 11, 21 Surface 3A, 3B, 3C, 3D Pool 31 Rear member 32 Side member 4A, 4B, 4C, 4D Molten metal 5A, 5B, 5C Scraper 51A, 51B, 51C Tip

Claims (7)

In a metal plate manufacturing apparatus for manufacturing a single-layer metal plate or a multi-layer clad metal plate by continuous casting using a roll,
A first roll having cooling ability;
A first pool for storing the first molten metal,
The first pool is surrounded by the surface of the first roll, the first front plate positioned forward in the rotational direction of the first roll, the rear member positioned rearward in the rotational direction of the first roll, and both side members. And
The first front plate has a tip, and is movably provided so that the distance between the tip and the surface of the first roll can be changed.
The first roll rotates with the first metal layer while cooling the first molten metal in the first pool to form a semi-solid or solidified first metal layer on the surface of the first roll. And
The first front plate is urged so that the tip of the first front plate is always in surface contact with a semi-solid state surface of the first metal layer moving with the rotation of the first roll with a constant force. Being
The metal plate manufacturing apparatus characterized by the above-mentioned. A second roll having cooling ability, rotating in the opposite direction to the first roll;
A second pool for storing a second molten metal having a melting point equal to or lower than the melting point of the first molten metal,
The second roll is provided by being biased toward the first roll and facing the first roll in front of the first front plate in the rotation direction of the first roll,
The second pool is surrounded by the surface of the second roll, the first front plate, both side members, and the surface of the first roll,
The second roll is rotated with the second metal layer while cooling the second metal melt in the second pool to form a semi-solid or solid second metal layer on the surface of the second roll. And
The 1st metal layer which the 2nd metal layer which moves with rotation of the 2nd roll has passed between the tip part of the 1st front plate and the surface of the 1st roll with the rotation of the 1st roll The two layers that are in contact with each other are joined together by the two rolls and are completely solidified.
The metal plate manufacturing apparatus according to claim 1. A second roll having cooling ability, rotating in the opposite direction to the first roll;
Located between the second roll and the first front plate, and a second front plate,
A second pool for storing a second molten metal having a melting point equal to or lower than the melting point of the first molten metal;
A third pool for storing a third molten metal having a melting point equal to or higher than the melting point of the second molten metal,
The second roll is provided by being biased toward the first roll and facing the first roll in front of the first front plate in the rotation direction of the first roll,
The second pool is surrounded by the first front plate, the surface of the first roll, both side members, the surface of the second roll, and the second front plate,
The third pool is surrounded by the surface of the second roll, the second front plate, and both side members,
The second front plate has a tip, and is movably provided so that the distance between the tip and the surface of the second roll can be changed.
The second roll is rotated with the third metal layer while cooling the third metal melt in the third pool to form a semi-solid or solid state third metal layer on the surface of the second roll. And
The second front plate is urged so that the tip of the second front plate always comes into contact with the semi-solid state surface of the third metal layer moving with the rotation of the second roll with a constant force. And
With the rotation of the second roll, the first metal layer that has passed between the tip of the first front plate and the surface of the first roll with the rotation of the first roll, and with the rotation of the second roll The third metal layer that has passed between the tip of the second front plate and the surface of the second roll comes into contact with the second metal layer in a semi-solid state, and the first metal layer and the second metal layer The metal layer and the third metal layer are joined by the two rolls and are completely solidified.
The metal plate manufacturing apparatus according to claim 1. The diameter of the second roll is smaller than the diameter of the first roll;
The metal plate manufacturing apparatus as described in any one of Claim 2 or 3. A method for producing a single-layer metal plate using the metal plate production apparatus according to claim 1,
A first pouring step of pouring the first molten metal into the first pool;
The first roll is rotated while the first metal melt in the first pool is cooled by the first roll to form a semi-solid or solidified first metal layer on the surface of the first roll. Moving the first metal layer together with the surface of the first cooling step;
A first scraping step in which the front end portion of the first front plate is always brought into contact with the semi-solidified surface of the first metal layer with a constant force, and the surface of the first metal layer is scraped and leveled; The metal plate manufacturing method characterized by comprising. A method for producing a two-layer clad metal plate using the metal plate production apparatus according to claim 2,
A first pouring step of pouring the first molten metal into the first pool;
A second pouring step of pouring the second molten metal into the second pool;
The first roll is rotated while the first metal melt in the first pool is cooled by the first roll to form a semi-solid or solidified first metal layer on the surface of the first roll. Moving the first metal layer together with the surface of the first cooling step;
A first scraping step in which the front end portion of the first front plate is always brought into contact with the semi-solidified surface of the first metal layer with a constant force, and the surface of the first metal layer is scraped and leveled;
The second roll is rotated while the second metal melt in the second pool is cooled by the second roll to form the second metal layer in a semi-solid state or a solid state on the surface of the second roll. Moving the second metal layer together with the surface of the second cooling step;
A finishing step in which the first metal layer and the second metal layer are brought into contact with each other while the both rolls are rotated, and the both layers are joined together by the two rolls and completely solidified. A metal plate manufacturing method. A method for producing a three-layer clad metal plate using the metal plate production apparatus according to claim 3,
A first pouring step of pouring the first molten metal into the first pool;
A second pouring step of pouring the second molten metal into the second pool;
A third pouring step of pouring a third molten metal into the third pool;
The first roll is rotated while the first metal melt in the first pool is cooled by the first roll to form a semi-solid or solidified first metal layer on the surface of the first roll. Moving the first metal layer together with the surface of the first cooling step;
A first scraping step in which the front end portion of the first front plate is always brought into contact with the semi-solidified surface of the first metal layer with a constant force, and the surface of the first metal layer is scraped and leveled;
The second roll is rotated while rotating the second roll to cool the third metal melt in the third pool by the second roll to form a semi-solid or solidified third metal layer on the surface of the second roll. Moving the third metal layer together with the surface of the second cooling step;
A second scraping step in which the tip of the second front plate is always brought into contact with the semi-solidified surface of the third metal layer by a constant force and leveled while scraping the surface of the third metal layer;
The second metal melt in the second pool is brought into contact with the first metal layer and the third metal layer to form a second metal layer in a semi-solid state, and further, the first metal layer, the second metal layer, A metal plate manufacturing method, comprising: a finishing step in which three metal layers are joined together by the two rolls and completely solidified.

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