JP5881210B2 - Side dam plate, twin roll type continuous casting apparatus using the same, and method for producing metal plate - Google Patents

Description

  The present invention relates to a side dam plate, a twin roll type continuous casting apparatus using the side dam plate, and a method for manufacturing a metal plate. More specifically, the present invention relates to a side dam plate used in an apparatus for manufacturing a metal plate and a twin using the same. The present invention relates to a roll-type continuous casting apparatus and a metal plate manufacturing method.

  Conventional metal plate manufacturing methods or apparatuses are disclosed in, for example, Japanese Patent Laid-Open No. 4-322848 (Patent Document 1), Japanese Patent Laid-Open No. 1-186248 (Patent Document 2), and Japanese Patent Laid-Open No. 6-15414 (Patent Document 3). JP-A-1-133650 (Patent Document 4).

JP-A-4-322848 JP-A-1-186248 Japanese Patent Laid-Open No. 6-15414 JP-A-1-133650

  In the conventional twin-roll type continuous casting apparatus, the molten metal is held between the rolls, and the molten metal comes into a semi-solid state by contacting the roll. Semi-solid material receives pressure from the rolls in the gaps between the rolls and is squeezed downward, upward and laterally. The semi-solid material squeezed to the side penetrates between the roll and the side dam plates on both ends of the roll in the axial direction and solidifies there, so that it extends in the thickness direction on both sides of the resulting metal plate. It may cause burrs, so-called vertical burrs. Since vertical burrs cause defects during rolling in the subsequent process, countermeasures have been required.

  Therefore, in Patent Document 1, in order to convert a vertical burr into a horizontal burr, a side weir (corresponding to a side dam plate, the same applies hereinafter) is made a split movable type, and a predetermined amount of molten metal is poured into a hot water reservoir in a casting preparation period. Keeps the upper weir, intermediate weir and lower weir of the side weir pressed against the cooling drum (corresponding to the roll, the same shall apply hereinafter) on both ends, and retracts the intermediate weir and lower weir of the side weir at the start of casting. The upper weir is pressed against both ends of the cooling drum for casting, and then the lower weir of the side weir is retracted and the upper weir and the intermediate weir are pressed against both ends of the cooling drum for steady casting. A twin drum thin plate continuous casting method is disclosed.

  Similarly, in Patent Document 2, in order to convert a vertical burr into a horizontal burr, the side weir is divided and movable, and the upper weir is always pressed against the side surface of the cooling drum, and is pressed against the peripheral surface of the cooling drum at the start of casting. A side weir for a twin drum type continuous casting machine is disclosed which comprises a lower weir that recedes from the peripheral surface of the cooling drum in a steady state.

  Similarly, in Patent Document 3, in order to convert a vertical burr into a horizontal burr, the side edge of the slab erodes outward from the end face of the cooling roll below the side dam (corresponding to a side dam plate, the same applies hereinafter). At least one of the shape and size of the protruding portion is continuously detected during casting, and the height of the lower end of the side dam is adjusted according to the start position of protrusion based on the obtained detection data. It is disclosed.

  On the other hand, in Patent Document 4, in order to remove vertical burrs, the cast metal strip is skewed in the transport direction of the metal ribbon while being transported to the next process, and the plane of the metal ribbon is There is disclosed a deburring device for a continuous casting machine of a metal ribbon, characterized in that a rotating deburring tool having an inclined shaft is provided on both sides of the metal ribbon.

  However, in the methods of Patent Documents 1 to 3 described above, it is necessary to move the side dam plate according to the casting conditions, and power and sensors are required. Moreover, in the method of the above-mentioned patent document 4, it is necessary to separately provide a deburring device on the production line. For these reasons, the apparatus becomes complicated, and it is difficult to reduce the cost of the apparatus.

  Therefore, the present invention has been made to solve the above-described problems, and can easily prevent the occurrence of vertical burrs generated in the metal plate in the twin roll type continuous casting apparatus, or convert it into horizontal burrs. It aims at providing the manufacturing method of the side dam plate which can remove a horizontal burr | flash, the twin roll type continuous casting apparatus using the side dam plate, and a metal plate.

Sa id dam plate according to the present invention, there is provided a side dam plates for use in the molten or semi-solid material twin-roll continuous casting apparatus for producing a metal plate from, the side dam plates, melting or semi-solid material An opening communicating with the outside is provided on the surface in contact with the outer surface, and the width of the opening increases as the distance from the surface in contact with the molten or semi-solidified material increases, or the opening Are penetrating in a direction connecting the surface in contact with the molten or semi-solidified material and the opposite surface.

  Preferably, the width of the opening is 0.5 mm or more and 3.0 mm or less on the surface in contact with the molten or semi-solidified material.

  Preferably, a burr cutter for scraping off the horizontal burr generated at the end of the metal plate is attached to the middle or lower end of the opening.

  The twin roll type continuous casting apparatus according to the present invention has a cooling capability, a pair of rolls extending from one end to the other end, a weir provided on the surface of the roll, and one end side and the other end side of the roll A side dam plate according to any one of claims 1 to 5, wherein a pair of molten or semi-solidified materials are held between the side dam plate, the weir, and a pair of rolls. When the rolls rotate in opposite directions, the metal plate is discharged from between the pair of rolls.

  Preferably, the pair of rolls have the same diameter, and the opening height of the side dam plate is 1/60 or more and 1/10 or less of the diameter of the roll.

  Preferably, the diameters of the pair of rolls are different, and the opening height of the side dam plate is 1/60 or more and 1/10 or less of the diameter of the small diameter roll.

  The metal plate manufacturing method according to the present invention uses any of the above-described twin-roll continuous casting apparatuses.

  According to this invention, since the occurrence of vertical burrs can be suppressed with a simple configuration in which an opening is provided in the side dam plate, there is an effect that the cost of the apparatus can be reduced and the burrs can be easily removed.

It is a front view of the side dam plate according to Embodiment 1 of this invention. It is the side view of the side dam plate seen from the direction shown by arrow II in FIG. It is a bottom view of the side dam plate seen from the direction shown by arrow III in FIG. It is a figure which shows the continuous casting apparatus using the side dam plate according to Embodiment 1 of this invention. It is sectional drawing along the arrow VV line in FIG. It is a figure for demonstrating the dimension of a side dam plate. It is a side view of the side dam plate according to Embodiment 2 of this invention. It is a front view of the side dam plate according to Embodiment 2 of this invention. It is a figure which shows the horizontal burr removal for continuous casting using the side dam plate shown in FIG. It is a front view which shows the continuous casting method using the side dam plate according to a comparative example. It is a front view which shows the continuous casting method using the side dam plate according to a comparative example. It is a front view of the side dam plate according to Embodiment 3 of this invention. It is a bottom view of the side dam plate seen from the direction shown by arrow XIII in FIG. It is a figure which shows the continuous casting apparatus using the side dam plate according to Embodiment 3 of this invention. It is a figure which shows the continuous casting apparatus using the side dam plate according to Embodiment 4 of this invention. It is a figure which expands and shows the side dam plate in FIG. It is a figure which shows the continuous casting apparatus using the side dam plate according to Embodiment 5 of this invention.

  Embodiments of the present invention will be described below with reference to the drawings. In the following embodiments, the same or corresponding parts are denoted by the same reference numerals, and description thereof will not be repeated. Moreover, it is also possible to combine each embodiment.

(Embodiment 1)
FIG. 1 is a front view of a side dam plate according to Embodiment 1 of the present invention. The front side of the side dam plate means a surface opposite to the surface in contact with the molten metal when the side dam plate is attached to the twin roll type continuous casting apparatus (the same applies hereinafter). FIG. 2 is a side view of the side dam plate as seen from the direction indicated by the arrow II in FIG. FIG. 3 is a bottom view of the side dam plate as viewed from the direction indicated by the arrow III in FIG.

  Side dam plate 10 according to the first embodiment has a plate shape having a thickness. In the lower part of the side dam plate 10, an opening 11 is provided on the surface (back surface) in contact with the molten or semi-solidified material so as to extend in the vertical direction (vertical direction). Through the opening 11, the lower end of the internal space 12 communicates with the outside. The upper and lower sides of the side dam plate 10 refer to the direction in which the metal plate is discharged when the side dam plate 10 is attached to a twin roll type continuous casting apparatus. The width of the internal space 12 is the narrowest in the vicinity of the opening 11, and the width of the internal space 12 increases as the distance from the opening 11 increases. By adopting such a trapezoidal cross section of the internal space 12, the opening 11 is less likely to be clogged. Referring to FIG. 3, the spread angle (θ) of the internal space 12 is preferably 30 ° or more and less than 180 ° in the opening 11, and the side dam plate 10 is less likely to be clogged and easy to manufacture. Considering the thickness and strength, it is more preferably 30 ° or more and 150 ° or less, and further preferably 60 ° or more and 120 ° or less.

  In this embodiment, an example in which the width of the internal space 12 changes is shown. However, the present invention is not limited to this, and the width of the internal space 12 is constant when the thickness around the opening 11 of the side dam plate 10 is thin. (That is, the spread angle may be 0 °). Moreover, although the example of the trapezoid in which the cross section of the internal space 12 was comprised with the straight line is shown, it is not restricted to this, The trapezoid which sides other than the trapezoid upper base and the lower base swelled in the curved surface form may be sufficient. Even in this case, the spread angle (θ) is measured at the opening 11.

  Further, referring to FIG. 1, in this embodiment, an example in which the width of the opening 11 is constant in the vertical direction is shown. However, the present invention is not limited to this, and a configuration in which the width of the opening 11 changes may be adopted. .

  The side dam plate 10 can be manufactured by processing the opening 11 and the internal space 12 by cutting or the like from a single thick metal plate.

  FIG. 4 is a view showing a continuous casting apparatus using the side dam plate according to the first embodiment of the present invention. FIG. 5 is a cross-sectional view taken along line VV in FIG. 4 and 5, continuous casting apparatus 1 includes a pair of rolls 20 and 30 having the same diameter, and a side dam plate 10 disposed between the rolls 20 and 30. A dam 110 is provided adjacent to the side dam plate 10, and the molten metal 100 is held in a region surrounded by the pair of dams 110 and the pair of side dam plates 10. The molten metal 100 is solidified by contact with the rolls 20 and 30, and the metal plate 150 is discharged via the kiss point 25. The metal material of the molten metal 100 is cast with a twin-roll continuous casting machine, such as a material made of a single metal, an alloy material made of different kinds of metal, or an alloy material containing a material other than metal such as Si or SiCp (Silicon carbide particle). Any material that can be used is acceptable. Further, the material is not limited to a dissolved material, and may be a semi-solid material. The metal plate 150 is a metal plate having a thickness of about 100 μm to about 20 mm, such as a metal foil, a thin plate, or a thick plate, and refers to a metal plate having a thickness that can be manufactured by the continuous casting apparatus 1. The kiss point 25 is a point at which the roll surfaces of the rolls 20 and 30 are closest to each other, and is an intermediate point between the roll 20, the rotation shaft (not shown), and the rotation axis (not shown) of the roll 30. .

  The side dam plate 10 is a side dam plate 10 used in the twin-roll type continuous casting apparatus 1 that manufactures the metal plate 150 from the molten metal 100. The front and back of the side dam plate 10 are on the side where the opening 11 is provided. It arrange | positions so that the molten metal 100 may be touched.

  The semi-solid layer formed by being cooled by the roll 20 and the semi-solid layer formed by being cooled by the roll 30 are combined by the rolls 20 and 30 rotating in opposite directions, and the force pressing the roll 20 and the roll 30 Pressurized by (roll load) and the hydrostatic pressure received from the molten metal 100, the metal plate 150 is extruded from the kiss point 25. In a conventional twin-roll continuous casting apparatus, a semi-solid material is subjected to pressure in the gap between the rolls, and is squeezed downward, upward, and laterally of the roll gap, and is squeezed laterally. Since the material enters between the roll and the side dam plate and solidifies there, burrs extending in the plate thickness direction, so-called vertical burrs, are generated on both side surfaces of the metal plate. Therefore, in order to release this pressure to the opening 11 side, the opening 11 is preferably provided at a point where the semi-solidified layers are aligned above the kiss point 25.

  Due to the presence of the opening 11, so-called lateral burrs that extend in the plate direction on both side surfaces of the metal plate 150 and are thinner than the metal plate 150 according to the width of the opening 11 occur. In this way, the occurrence of vertical burrs can be suppressed by intentionally generating horizontal burrs. Further, since this horizontal burr has not yet completely solidified, it can be easily removed by a burr cutter 40 described later.

  Furthermore, when the aluminum alloy metal plate 150 is manufactured using the twin roll type continuous casting apparatus 1 shown in FIG. 4, it is necessary to increase the roll load, so that vertical burrs are likely to occur. Therefore, the side dam plate 10 is effective for preventing vertical burrs.

  Moreover, since the side dam plate 10 is fixed to the continuous casting apparatus 1 in the above-described side dam plate 10, no power is required to move the side dam plate 10, and there is no movable part, and the structure is simple. Therefore, when used in the twin roll type continuous casting apparatus 1, it is possible to suppress the occurrence of vertical burrs at a lower cost than in the conventional technique.

  The lower part of the opening 11 communicates with the outside. The width of the opening 11 is preferably 0.5 mm or greater and 3.0 mm or less, more preferably 1.0 mm or greater and 3.0 mm or less, and even more preferably 1.5 mm or greater and less than 3.0 mm on the surface in contact with the molten metal 100. is there. The width of the opening 11 increases as the distance from the molten metal 100 increases.

  The twin roll type continuous casting apparatus 1 has a cooling capability, a pair of rolls 20 and 30 extending from one end 28 and 38 to the other end 29 and 39, and a pair provided on the roll surface of the rolls 20 and 30. Dams 110, 110 and a pair of side dam plates 10, 10 provided on one end 28, 38 side and the other end 29, 39 side of the rolls 20, 30, respectively. The molten metal 100 is held between the pair of rolls 20 and 30 and the pair of rolls 20 and 30 rotates in opposite directions, whereby the metal plate 150 is discharged from between the pair of rolls 20 and 30. The

  In this embodiment, the direction in which the opening 11 extends is the direction in which the metal plate 150 is discharged, but the direction in which the opening 11 extends may intersect the direction in which the metal plate 150 is discharged. . In this case, since the opening 11 is disposed obliquely, the burr can be cut, and therefore it is not necessary to provide a cutter for removing the burr.

  Regarding the center position of the opening 11 in the width direction, the center of the opening 11 is preferably aligned with the point where the semi-solidified layers overlap each other. The lower end of the opening 11 may extend downstream from the kiss point 25 where the rolls 20 and 30 are closest to each other, but in practice, it is preferable to provide the lower end within 10 mm. The height of the opening 11 is preferably 1/60 or more of the diameter of the roll 20, and the upper limit of the height is not particularly limited, but is practically preferably 1/10 or less of the diameter of the roll 20, Preferably, it is 1/30 or more and 1/10 or less of the diameter of the roll 20.

  FIG. 6 is a view for explaining the dimensions of the side dam plate. With reference to FIG. 6, the height of the opening 11 from the roll axis center (the line connecting the centers of the rolls 20 and 30) can be set as H, the width of the opening 11 can be set as W, and these can be set variously. . The height H is measured from the roll axis center. Even when the lower end of the opening 11 is located below the roll axis center, or even when the lower end of the opening 11 is located above the roll axis center, the height H is the roll axis center. Measure from

  In continuous casting apparatus 1 according to the first embodiment, molten metal 100 does not leak from opening 11. The width of the opening 11 is preferably 0.5 mm or greater and 3.0 mm or less, more preferably 1.0 mm or greater and 3.0 mm or less, and even more preferably 1.5 mm or greater. This is because it is narrowed to be less than 0 mm, so that leakage is prevented by the action of surface tension.

  The thickness of the semi-solidified layer in the rolls 20 and 30 varies depending on the casting conditions such as the material used for the molten metal 100, the pouring temperature, and the roll peripheral speed. Therefore, if the material of the molten metal 100 is different, the position where the semi-solidified layer on the surface of the roll 20 and the semi-solidified layer on the surface of the roll 30 are in contact, that is, the position where the burr starts is changed.

  Since the opening 11 extends in the vertical direction, the opening 11 is positioned at each of the different burr starting points even if the position where the burr starts is changed. Thereby, generation | occurrence | production of a vertical burr | flash can be suppressed by the elongate opening 11 under any casting conditions. Therefore, the position of the side dam plate 10 can be fixed, and there is no need to provide a device for moving the side dam plate 10 and a device for moving it up and down like the techniques of Patent Documents 1, 2, and 3.

  Since the opening 11 having a certain width that communicates with the outside extends, the semi-solid material moves through the opening 11 through the opening 11 in the side dam plate 10 to the free space (atmosphere side) in the thickness direction of the side dam. Yes, the burr is not a vertical burr but a horizontal burr. Since the cross-sectional shape is narrow on the surface of the side dam plate 10 in contact with the molten metal 100 and becomes wider toward the opposite side, the semi-solid product can easily move in the thickness direction in the internal space 12 of the side dam plate 10, and the opening 11 does not easily clog semi-solids.

  The side dam plate 10 has a simple structure and is easy to manufacture. It is only necessary to replace the side dam plate of the conventional twin roll continuous casting apparatus with the above-mentioned side dam plate, and there is no need to add a new apparatus.

(Embodiment 2)
FIG. 7 is a side view of a side dam plate according to the second embodiment of the present invention. FIG. 8 is a front view of a side dam plate according to the second embodiment of the present invention. Referring to FIGS. 7 and 8, varicutter 40 is attached to the lower portion of side dam plate 10 according to the second embodiment of the present invention. The burr cutter 40 is a member for removing burr generated in the opening 11.

  FIG. 9 is a diagram showing deburring for continuous casting using the side dam plate shown in FIGS. Referring to FIG. 9, in the step of forming metal plate 150 in the continuous casting method shown in FIG. 4, horizontal burrs 151 are generated on both side surfaces of metal plate 150. Since the metal plate 150 and the horizontal burr 151 flow in the direction indicated by the arrow 152, the burr cutter 40 is disposed between the metal plate 150 and the horizontal burr 151, so that the horizontal burr 151 before solidification can be applied from the metal plate 150 with low load. It can be peeled off. The stripped horizontal burr 151 is removed without coming into contact with the metal plate 150 again, and can be collected separately.

  In this example, the wedge-shaped varicutter 40 is used. However, the present invention is not limited to this, and a varicutter 40 having a circular tip may be used. The burr cutter 40 as a burr stripping means can be constituted by a cutter (blade) or a metal wire.

  Referring to FIG. 8, in this example, the varicutter 40 is attached to the lower end of the opening 11 of the side dam plate 10. However, the present invention is not limited to this, and the varicutter 40 extends in the opening 11 extending in the vertical direction. There may be.

  By providing the burr cutter 40, the burr can be easily removed by peeling off the horizontal burr before solidification with a low load.

(Comparative example)
10 and 11 are front views showing a continuous casting method using a side dam plate according to a comparative example. Referring to FIG. 10 and FIG. 11, in the manufacturing process of the metal plate 150 in the continuous casting method according to the comparative example, the conventionally used side dam plate 10 having no opening is used. In the continuous casting method according to the comparative example, in order to suppress the occurrence of vertical burrs on the metal plate 150, the position of the lower end of the side dam plate 10 is adjusted by moving the side dam plate 10 in the direction indicated by the arrow 101. Continuous casting is performed. In this case, since it is necessary to adjust the position of the lower end of the side dam plate 10 while preventing the molten metal 100 from leaking between the side dam plate 10 and the weir 110, the cost of the apparatus increases. There is.

(Embodiment 3)
FIG. 12 is a front view of a side dam plate according to the third embodiment of the present invention. FIG. 13 is a bottom view of the side dam plate as seen from the direction indicated by the arrow XIII in FIG.

  Side dam plate 10 according to Embodiment 3 of the present invention is provided with slit members 15 and 15 at the bottom of side dam plate body 10A. By providing these slit members 15 and 15 apart from each other, a slit-like opening 11 penetrating from the surface in contact with the molten metal extending toward the lower portion of the side dam plate 10 to the opposing surface is formed. Yes. This is because the slit members 15 and 15 are provided separately from the side dam plate body 10A so that the width of the opening 11 can be easily adjusted in order to conduct experiments with various widths of the opening 11. A configuration is adopted in which the slit members 15, 15 are temporarily fixed to the side dam plate body 10A.

  Referring to FIG. 13, in the side dam plate according to the third embodiment of the present invention, the width of opening 11 is narrow on the surface (back surface) in contact with the molten metal, and the width of opening 11 is wide on the facing surface (front surface). It is configured. By adopting such a trapezoidal cross section of the internal space 12, the opening 11 is less likely to be clogged. Referring to FIG. 13, the spread angle (θ) of the internal space 12 is preferably 30 ° or more and less than 180 ° in the opening 11, and the side dam plate 10 is less likely to be clogged and easy to manufacture. Considering the thickness and strength, it is more preferably 30 ° or more and 150 ° or less, and further preferably 60 ° or more and 120 ° or less.

  However, the present invention is not limited to this, and when the thickness around the opening 11 of the side dam plate 10 is thin, a configuration in which the width of the opening 11 penetrates with a constant width from the back surface to the front surface of the side dam plate 10 may be adopted. .

  Moreover, although the example of the trapezoid in which the cross section of the internal space 12 was comprised with the straight line is shown, it is not restricted to this, The trapezoid which sides other than the trapezoid upper base and the lower base swelled in the curved surface form may be sufficient. Even in this case, the spread angle (θ) is measured at the opening 11.

  Further, referring to FIG. 12, in this embodiment, an example in which the width of the opening 11 is constant in the vertical direction is shown. However, the present invention is not limited to this, and a configuration in which the width of the opening 11 changes may be adopted. .

  FIG. 14 is a view showing a continuous casting apparatus using a side dam plate according to the third embodiment of the present invention.

  Referring to FIG. 12, the effect when the height of opening 11 from the roll axis center (the line connecting the centers of rolls 20 and 30) is H, the width of opening 11 is W, and these are variously set. Is shown in Table 1.

  A6022, ADC12, and A5182 in Table 1 each indicate an Al alloy material defined by the JIS standard. Al-30% SiCp refers to an aluminum alloy containing 30% by mass of SiCp (Silicon Carbide particles). Al-25% Si indicates an aluminum alloy containing 25% by mass of Si. The casting conditions were as follows.

Pouring temperature: In the case of A6022, ADC12, A5182, the liquidus temperature is from -5 ° C to + 150 ° C, and in the case of Al-30% SiCp, the liquidus temperature is from -5 ° C to + 150 ° C, Al-25% Si. In case of liquidus temperature -20 ℃ to + 100 ℃
Roll diameter (diameter): 300mm
Roll peripheral speed: 10 to 200 m / min
Roll load: 10-200 kg / mm
From Table 1, the width W of the opening 11 is preferably 0.5 mm or more and 3.0 mm or less, more preferably 1.0 mm or more and 3.0 mm or less, and 1.5 mm or more and less than 3.0 mm. It can be seen that it is more preferable. If the width W is less than 0.5 mm, the effect of suppressing vertical burrs cannot be obtained. If the width W exceeds 3.0 mm, the molten metal 100 may leak.

  Furthermore, the height H of the opening 11 was varied and the effect of the opening was examined. The results are shown in Table 2.

  ADC12 and A5182 in Table 2 each indicate an Al alloy material defined by JIS standards. The casting conditions are the same as in Table 1.

  From Table 2, the height H of the opening 11 is preferably 1/60 or more of the diameter of the roll 20 (that is, 5 mm or more), more preferably 1/30 or more of the diameter of the roll 20 (that is, 10 mm or more). I understand. If the height H is less than 5 mm, the effect of suppressing vertical burrs may not be obtained.

  The side dam plate 10 can be manufactured by machining the opening 11 and the internal space 12 from a single thick metal plate by cutting or the like. However, the side dam plate 10 is formed as in the third embodiment of the present invention. If the side dam plate main body 10A and the slit member 15 are prepared separately, and the width of the opening 11 is set to an appropriate value and joined by welding or the like, it can be manufactured at low cost.

  Further, even if the side dam plate main body 10A of the side dam plate 10 and the slit member 15 are not in contact with each other and there is a gap between them so that the molten metal 100 does not leak, the slit member 15 is not attached to the side dam plate main body 10A. You may employ | adopt the structure fixed so that it might not move.

(Embodiment 4)
FIG. 15 is a diagram showing a continuous casting apparatus using a side dam plate according to the fourth embodiment of the present invention. FIG. 16 is an enlarged view of the side dam plate in FIG. Referring to FIGS. 15 and 16, in continuous casting apparatus 1 according to the fourth embodiment of the present invention, varicutter 41 is provided below opening 11 using side dam plate 10 similar to that in the third embodiment. ing. The Vari Cutter 41 has the same shape as the Vari Cutter 40 shown in the second embodiment. When the metal plate 150 of ADC12 and A5182 was manufactured when the height H of the opening 11 was 15 mm and the width W was 2 mm, the horizontal burrs could be removed by the varistor 41.

(Embodiment 5)
FIG. 17 is a diagram showing a continuous casting apparatus using a side dam plate according to the fifth embodiment of the present invention. Referring to FIG. 17, in the continuous casting apparatus according to the fifth embodiment of the present invention, large diameter roll 20 and small diameter roll 30 constitute a pair of twin rolls. Further, the direction in which the metal plate 150 is pulled out is not the vertical method, but is pulled out in a direction inclined from the vertical direction. By making one of the rolls with a small diameter, the thick metal plate 150 can be manufactured while keeping the continuous casting apparatus 1 small.

  In continuous casting apparatus 1 according to Embodiment 5 of the present invention, side dam plate 10 similar to side dam plate 10 of Embodiment 1 or 3 is used. The direction in which the opening 11 of the side dam plate 10 extends is the direction in which the metal plate 150 is discharged. The upper and lower sides of the side dam plate 10 refer to the direction in which the metal plate 150 is discharged when the side dam plate 10 is attached to the continuous casting apparatus 1. Similarly, the height of the opening 11 means the length in the direction in which the metal plate 150 is discharged, and the width of the opening 11 means the width in the direction orthogonal to the direction in which the metal plate 150 is discharged.

  Regarding the center position of the opening 11 in the width direction, the center of the opening 11 is preferably aligned with the point where the semi-solidified layers overlap each other. The lower end of the opening 11 may extend downstream from the kiss point 25 where the rolls 20 and 30 are closest to each other, but in practice, it is preferable to provide the lower end within 10 mm. The height of the opening 11 is preferably 1/60 or more of the diameter of the small-diameter roll 30 and the upper limit of the height is not particularly limited, but is practically preferably 1/10 or less of the diameter of the roll 20. More preferably, it is 1/30 or more and 1/10 or less of the diameter of the roll 20. Further, the width of the opening 11 is preferably 0.5 mm or more and less than 3.0 mm, more preferably 1.0 mm or more and less than 3.0 mm, and more preferably 1.5 mm or more and 3. More preferably, it is less than 0 mm. A configuration in which the width of the opening 11 is narrow on the surface in contact with the molten metal 100 and the width of the opening 11 is wide on the opposite side may be employed.

  Furthermore, the varicutters 40 and 41 of the second or fourth embodiment can be combined with the side dam plate 10 shown in FIG.

  The direction in which the opening 11 of the side dam plate 10 extends is the direction in which the metal plate 150 is discharged, but the direction in which the opening 11 extends may intersect the direction in which the metal plate 150 is discharged. In this case, since the opening 11 is arranged obliquely, the horizontal burr can be cut, so that it is not necessary to provide a burr cutter for removing the horizontal burr.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  DESCRIPTION OF SYMBOLS 1 Continuous casting apparatus, 10 Side dam plate, 10A Side dam plate main body, 11 Opening, 15 Slit member, 20, 30 Roll, 28, 38 One end, 29, 39 The other end, 40, 41 Varicutter, 100 Molten metal, 110 Weir , 150 Metal plate, 151 Horizontal burr.

Claims (7)

A side dam plate used in a twin-roll continuous casting apparatus for producing a metal plate from a molten or semi-solid material,
The side dam plate is provided with an opening that communicates with the outside, extending toward the lower part, on the surface that contacts the molten or semi-solidified material .
The width of the opening increases as the distance from the surface in contact with the molten or semi-solidified material increases, or the opening penetrates in a direction connecting the surface in contact with the molten or semi-solidified material and the opposite surface. The side dam plate. The side dam plate according to claim 1, wherein the width of the opening is 0.5 mm or more and 3.0 mm or less on a surface in contact with the molten or semi-solidified material. The side dam plate according to claim 1 or 2 , wherein a burr cutter for scraping a horizontal burr generated at an end portion of the metal plate is attached to the inside or the lower end of the opening. A pair of rolls having cooling ability and extending from one end to the other
A weir provided on the surface of the roll;
A side dam plate according to any one of claims 1 to 3 provided on one end side and the other end side of the roll, and between the side dam plate, the weir, and the pair of rolls. A twin-roll type continuous casting apparatus in which a molten or semi-solid material is held and the pair of rolls rotate in opposite directions so that the metal plate is discharged between the pair of rolls. 5. The twin-roll continuous casting apparatus according to claim 4 , wherein the pair of rolls have the same diameter, and the height of the opening of the side dam plate is 1/60 or more and 1/10 or less of the diameter of the roll. 5. The twin-roll continuous casting apparatus according to claim 4 , wherein the diameters of the pair of rolls are different and the height of the opening of the side dam plate is 1/60 or more and 1/10 or less of the diameter of the small-diameter roll. The manufacturing method of a metal plate using the twin roll type continuous casting apparatus in any one of Claims 4 thru | or 6 .

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