JP5770337B2 - Prevention method of oscillation synchronization failure of short casting mold plate for continuous casting - Google Patents

Description

  The present invention relates to a method for preventing powder from adhering to the back side of a short-side mold plate of a continuous casting mold in which two short-side mold plates are sandwiched between two long-side mold plates.

  In continuous casting for continuously casting a slab such as steel, a continuous casting mold is used in which two short-side mold plates 1 are sandwiched between two long-side mold plates 4 as shown in FIG. The portion of the rectangular cross section surrounded by the long side mold plate 4 and the short side mold plate 1 is an area for pouring the molten metal. In both the long side mold plate 4 and the short side mold plate 1, a copper plate is arranged on the side in contact with the molten metal, and a steel frame is arranged on the back side of the copper plate to hold the copper plate. A slit is engraved on the copper plate, and the cooling water is made to flow by using the slit as a cooling water channel to form a water-cooled copper mold. A long-side pressing device 22 is connected between one of the long-side mold plates 4 and the frame 21, and a long-side pressing device 22 applies a force in a direction that narrows the distance between the long-side template plates 4. The short side mold plate 1 can be sandwiched by the side mold plate 4.

  In continuous slab casting, in order to cast slabs having various slab widths, the interval between the two short side mold plates 1 is variable. A short-side drive device 7 for moving the short-side mold plate 1 in the slab width direction is prepared, and the short-side drive device 7 is connected to the short-side frame 3 disposed on the back surface of the short-side mold plate 1. The distance between the short side mold plates can be changed by driving the short side driving device 7 while the short side mold plate 1 is sandwiched between the two long side mold plates 4. A hydraulic cylinder or the like is used as the short side driving device 7 for driving the short side mold plate 1.

  Before starting casting, the distance between the long side copper plates is slightly wider than the width of the short side mold plate by the operation of the long side pressing device 22, and the distance between the short side mold plates 1 is set to a predetermined distance by the operation of the short side driving device 7. After that, the long side pressing plate 22 is operated to sandwich the short side mold plate 1 with the long side mold plate 4 to form a slab slab size mold to be cast and to start casting.

  When changing the width during casting, the short-side driving device 7 connected to the back surface of the short-side mold plate 1 is operated while the short-side mold plate 1 is sandwiched between the long-side mold plates 4 to thereby shorten the short-side mold plate 1. The slab width is changed by changing the distance between the copper plates.

  During continuous casting of the molten metal, continuous casting powder is supplied to the surface of the molten metal in the mold. The continuous casting powder that covers the surface of the molten metal in the mold melts by contacting the molten metal, the molten powder film flows between the mold wall and the solidified shell, and maintains the lubrication between the mold wall and the solidified shell, It has the function of adsorbing the oxide that floats inside the molten metal and the function of keeping the surface of the molten metal warm.

  When powder for continuous casting is put into the mold, the powder rises as dust, and a part of the powder is surrounded by the back side of the short-side mold plate and the two long-side mold plates (hereinafter “short-side mold plate”). Also called back space 12 ”). In patent document 1, the cover for preventing the penetration | invasion of the powder from a mold upper end is attached, and the inside of a cover is purged with gas, The measure which prevents the penetration | invasion of the powder to a short side mold plate back space is taken. ing. However, even if this method is adopted, it is difficult to completely prevent the intrusion of the powder, and the powder intrudes into the space behind the short side mold plate.

  The continuous casting powder that has entered the short side mold plate back space 12 mixes with water and steam sprayed for cooling the slab below the mold and adheres to the long side copper plate surface facing the short side mold plate back space. . If powder adheres to the long side copper plate surface and accumulates, it becomes difficult to remove. As described in Patent Document 2, it is possible to prevent the powder from adhering to the long side copper plate surface by spraying water on the long side copper plate surface facing the back side space of the short side mold plate to form a wet wall. As a result, even when the short-side mold plate is moved when the casting width is changed, foreign matter such as powder is prevented from getting into the sliding portion with the long-side copper plate surface, so that the mold slide flaw is reduced and the mold life is reduced. It can be up.

JP-A-7-124710 Japanese Patent Laid-Open No. 10-323741

  According to the method described in Patent Document 2, it has become possible to prevent a phenomenon in which powder adheres to the surface of the long-side copper plate in the space behind the short-side mold plate. As a result, mold scraps are reduced and the mold life can be increased.

  In continuous casting, mold oscillation is applied. During casting, the mold is vibrated in the vertical direction. In a continuous casting mold in which two short-side mold plates are sandwiched between two long-side mold plates, the long-side mold plate is vibrated by connecting an oscillation applying device to the long-side mold plate. Vibrates in synchronization with the vibration of the long side mold plate. However, as a new problem, there has been a phenomenon in which the short-side mold plate does not synchronize with the long-side vibration even when the long-side mold plate is vibrated while the oscillation is given to the mold.

  When imbalance of the mold vibration occurred, the space on the back of the short side of the mold was observed, and although no powder adhesion was observed on the surface of the long piece of copper, the back side of the short side of the mold (the short side frame was On the installed side), it was found that a large amount of powder was deposited on the short side mold plate. It was estimated that such powder adhesion to the back surface of the short side mold plate was the cause of the poor oscillation synchronization of the short side plate.

  An object of the present invention is to prevent powder accumulation on the back surface of a short-side mold plate, and to prevent an oscillation synchronization failure of the short-side mold plate.

  The short side mold plate takes a form in which the short side copper plate is held from behind by a short side frame. Therefore, as shown in FIG. 4, the short side frame 3 and a structure connected thereto, for example, a short side, are provided on the back side 25 of the short side mold plate 1 (on the side opposite to the side where the short side copper plate 2 is installed). The short side driving device 7 and the like for moving the mold plate are exposed. The continuous casting powder that has entered the short-side mold plate back space 12 is mixed with water and steam sprayed for cooling the slab below the mold, and the surface of the short-side frame 3 facing the short-side mold plate back space 12. Alternatively, the deposit 30 is deposited on the surface of a structure such as a cylinder of the short side driving device 7 connected to the short side frame. As the amount of deposition increases, the deposit finally comes into contact with the long strip copper plate surface. Further, as shown in FIG. 5, the deposit 30 also enters the side surface 26 of the short side frame 3. The short side mold plate oscillation failure is caused by the powder deposited on the back of the short side plate contacting the surface of the long piece copper plate, and the deposit deposited on the side of the short side frame contacting the surface of the long piece copper plate. It has become clear that this occurs.

  And by spraying a liquid or spraying gas on the back surface 25 side of the short side frame 3, powder accumulation on the back surface of the short side mold plate can be prevented, and as a result, the oscillation synchronization failure of the short side mold plate can be prevented. It was found that the occurrence can be prevented.

This invention is made | formed based on the said knowledge, The place made into the summary is as follows.
(1) A continuous casting mold in which two short-side mold plates 1 are sandwiched between two long-side mold plates 4 is used. The short-side mold plate 1 has a short-side copper plate 2 in contact with the molten metal and a back-side copper plate that holds the short-side mold plate 1. This is a method for preventing oscillation synchronization failure of a continuous casting mold short-side mold plate, which comprises a short-side frame 3 and a short-side drive device 7 for moving the short-side mold plate 1 is connected to the short-side frame 3. The continuous casting mold short is characterized in that a liquid is sprayed or sprayed onto the back side surface of the short side frame 3 and the short side driving device 7 connected to the back side of the short side frame, the cooling pipe and the frame. A method for preventing improper synchronization of the side mold plate .
(2) the liquid is water, or the gas Oscillation tuning method for preventing failure of the continuous casting mold short side mold plate according to the above (1), wherein the air.

  The present invention uses a continuous casting mold in which two short-side mold plates are sandwiched between two long-side mold plates, and the short-side mold plate is a short-side copper plate that is in contact with the molten metal and a short-side short side that holds it. In a continuous casting mold comprising a frame and a drive device for moving the short side mold plate connected to the short side frame, by spraying liquid or blowing gas on the back side of the short side frame, the short side It is possible to prevent powder accumulation on the back surface of the mold plate, and to prevent occurrence of oscillation synchronization failure of the short side mold plate.

It is a figure which shows an example of the casting_mold | template for continuous casting to which this invention is applied, (a) is AA arrow sectional drawing, (b) is a partial front view, (c) is CC arrow sectional drawing. . It is a figure which shows an example of the casting_mold | template for continuous casting to which this invention is applied, (a) is AA arrow sectional drawing, (b) is a partial front view, (c) is CC arrow sectional drawing. . It is a partial top view which shows the conventional mold for continuous casting. It is a figure which shows the powder deposition condition in the conventional casting mold for continuous casting, (a) is AA arrow sectional drawing, (b) is a partial front view, (c) is CC arrow sectional drawing. It is a top view which shows the powder deposition condition in the conventional casting mold. It is a top view explaining the casting mold for continuous casting.

  The present invention will be described with reference to FIGS.

  The present invention is a continuous casting mold in which two short-side mold plates 1 are sandwiched between two long-side mold plates 4, and the short-side mold plate 1 is a short-side copper plate 2 that is in contact with the molten metal and a back surface that holds the short-side copper plate 2. It is intended for a continuous casting mold comprising a short side frame 3 on the side, and a short side driving device 7 for moving the short side mold plate 1 connected to the short side frame 3. Two short-side mold plates 1 are sandwiched between two long-side mold plates 4 and the short-side mold plate 1 is held by the pressure between the long-side mold plates. A short-side drive device 7 such as a hydraulic cylinder is connected to the short-side frame 3, and the short-side mold plate 1 is moved by driving the short-side drive device 7 while sandwiching the short-side mold plate 1 with the long-side mold plate 4. By doing so, the cast slab width can be changed even during casting.

  During continuous casting of the molten metal, continuous casting powder is supplied to the surface of the molten metal in the mold. When the powder for continuous casting is put into the mold, the powder rises as dust, part of which is surrounded by the back side of the short side mold plate and the two long side mold plates (the back side of the short side mold plate) 12).

  The continuous casting powder that has entered the short-side mold plate back space 12 is mixed with water and steam sprayed for cooling the slab below the mold, and as shown in FIG. It adheres to the short side frame 3 and the short side driving device 7 on the long side copper plate surface and the back side of the short side mold plate. About the powder adhering to the long piece copper plate surface, as shown in FIG. 3, by sprinkling water from the long side copper plate nozzle 14 on the surface of the long side copper plate 5 facing the short side mold plate back space 12, the wet wall is formed. The powder can be prevented from adhering to the long side copper plate surface.

  A short side driving device 7 for moving the short side mold plate 1 is connected to the short side frame 3 on the back side of the short side mold plate, as well as a cooling water pipe 8, a short side support roll 11 below the mold and a short side. A frame 9 for holding the side plate is connected. Therefore, the back surface of the short side mold plate is not a flat surface, but forms a complex-shaped structure. Then, the powder for continuous casting that has entered the back surface 12 of the short-side mold plate adheres onto the complex-shaped structure on the back of the short-side mold plate, and the adhering powder contains moisture so that it adheres and accumulates. . Simply spraying water on the surface of the long copper plate cannot prevent the powder from adhering or accumulating on the back surface of the short side mold plate. When the powder is deposited on the structure on the back surface of the short side mold plate, the width of the deposit 30 in the mold width direction becomes equal to the width of the short side mold plate 1 as shown in FIG.

  As described above, the two long-side mold plates 4 press the two short-side mold plates 1 sandwiched therebetween with a predetermined pressing force by the operation of the long-side pressing device 22 shown in FIG. Before starting casting, the distance between the long side copper plates is slightly wider than the width of the short side mold plate by the operation of the long side pressing device 22, and the distance between the short side mold plates 1 is set to a predetermined distance by the operation of the short side driving device 7. After that, the long side pressing plate 22 is operated to sandwich the short side mold plate 1 with the long side mold plate 4 to form a slab slab size mold to be cast and to start casting. When powder is deposited on the structure on the back of the short side mold plate and the width of the deposit 30 in the mold width direction is equal to the width of the short side mold plate 1, the distance between the long copper plates is set at the start of casting. If the width is larger than the width of the short side mold plate, the deposition width of the deposit 30 is also larger than the width of the short side mold plate. At this time, since a gap is formed between the short side mold plate and the long side copper plate, a part of the powder deposit deposited on the structure on the back side of the short side mold plate is shown in FIG. 1 side 26 will be entered.

  When starting casting, the long side pressing device 22 is operated to narrow the interval between the long side mold plates that have been widened, and press the two long side mold plates 4 against the short side mold plate 1. During casting, the short side mold plate 1 is constrained by the long side mold plate 4. When the long side mold plate 4 is subjected to oscillation, the short side mold plate 1 is also synchronized with the long side mold plate 4 to oscillate. Perform the action. However, if the width of the deposit 30 itself is wider than the width of the short side mold plate 1, the deposit 30 takes part of the pressing force by the long side mold plate 4, and the pressing force pressing the short side mold plate 1. As a result, the gap 27 is formed without contact between the long-side copper plate 5 and the short-side copper plate 2 side surface (FIG. 5). Further, when powder is deposited on the side surface 26 of the short side frame 3 so that the combined width of the short side frame 3 and the deposit 30 becomes wider than the width of the short side mold plate 2, the pressing force of the long side copper plate is reduced. The deposit deposited on the side surface of the side frame is received, and the gap 27 is generated without the long side copper plate and the short side copper plate contacting each other.

  When the width of the slab is changed during casting and the width is changed from a narrow width to a wide width, the short side mold plate 1 is directed outward from the mold center side by the operation of the short side driving device 7. Will move. At this time, if powder accumulation on the back surface of the short side mold plate proceeds, the accumulated powder enters a gap between the side surface of the short side mold plate and the long side copper plate.

  In this way, when the pressing force of the long side copper plate acts on the deposit instead of acting on the short side copper plate, the restraining force of the short side mold plate by the long side mold plate decreases, and the long side mold plate oscillates. When it is given, it becomes difficult for the short side mold plate to follow the long side mold plate to perform the oscillation operation, and the oscillation synchronization failure occurs. Oscillation failure is, for example, when a sinusoidal oscillation with an amplitude of ± 8 mm and a frequency of 100 cpm is applied to a long side mold plate. (1) Oscillation of a short side mold plate and the long side mold plate One or more of the following phenomena occur: (2) the amplitude of the short side template plate is smaller than the amplitude of the long side template plate, and (3) the vibration stops. To do. When the oscillation synchronization failure of the short side mold plate occurs, the molten powder formed on the surface of the molten metal in the mold is poorly flowed and the initial solidified shell is poorly formed, which may lead to breakout.

  As shown in FIGS. 1 and 2, the present invention is characterized in that liquid is sprayed or gas is sprayed on the back side of the short side frame 3. On the back side of the short side frame 3, the back side surface of the short side frame is exposed, a short side driving device 7 is connected, a cooling pipe 8 is connected, and the short side support roll 11 and the short side plate below the mold are connected. Is connected to the frame 9. When the liquid is sprayed or the gas is sprayed on the back side of the short side frame 3, not only the back side surface of the short side frame but also the short side drive device 7, the cooling pipe 8, and the frame 9 connected to the back side of the short side frame. It is effective to spray a liquid or blow a gas on a structure such as the above. Thereby, it is possible to prevent the powder from adhering and accumulating on the surface of the structure on the back side of the short side mold plate.

  When a liquid is sprayed on the back side of the short side frame, it is preferable to use circulating water for cooling the mold as the liquid. This is because the circulating water for cooling the mold is the cheapest liquid to spray the short side mold plate back space 12. Other than the circulating water for cooling the mold, it can be used as a liquid by spraying with tap water from the outside of the mold and can be easily taken out. However, since the short side mold plate generally has a width changing mechanism, it is difficult to adjust the spraying position, etc., to spread and apply piping from the outside of the mold, and circulating water for cooling the mold is most appropriate. is there. When spraying the liquid, the deposition preventing effect can be sufficiently exerted by simply applying the liquid to the target without increasing the flow velocity from the nozzle 13. Further, it is more preferable that the liquid is ejected vigorously at a flow velocity from the nozzle 13 because the effect of removing the already fixed deposit is also exhibited. It is good also as mixing a liquid and compressed gas and spraying a liquid on a target as a spray state.

  When gas is blown on the back side of the short side frame, it is preferable to use air as the gas. This is because air is the cheapest and easy to use gas. In addition to air, nitrogen or argon can be used as the gas. When gas is blown, there is a gas flow on the surface of the object to be adhered, and it is effective only to move (float) the adhered substance, but sticking can be prevented by spraying the gas vigorously with a flow rate. it can.

  During casting, the short side mold plate is moved by the short side driving device 7 in accordance with the change in the cast slab width. It is necessary to move the nozzle 13 for spraying liquid or spraying gas on the back side of the short side frame 3 together with the short side mold plate 1. Therefore, when spraying the liquid on the back side of the short side frame 3, it is preferable to use the short side copper plate cooling water as the liquid and take it out from the drain side of the short side copper plate cooling water. As long as the nozzle 13 can move together with the short-side mold plate 1, it is not necessary to use the short-side copper plate cooling water as the liquid to be sprayed. On the other hand, taking out from the short-side copper plate cooling water intake side is not preferable because there is a possibility that the flow rate of the mold cooling water cannot be secured stably.

  When the powder adheres to the back side of the short-side mold plate 1, first, sticking / deposition occurs at the lower portion of the short-side mold plate, and then the sticking / deposition site expands upward. First, sticking / deposition occurs within a range of ¼ from the bottom in the height direction of the short-side mold plate 1. Accordingly, the liquid is sprayed on the surface of the short side frame on the back side of the short side frame and the structure connected to the short side frame at least in the range of the length in the height direction of the short side mold plate 1 from the bottom to ¼. Or the effect of this invention can be exhibited by spraying gas.

  A short side driving device 7 is connected to the back side of the short side mold plate. Usually, as shown in FIG. 1, the short side drive apparatus 7 is comprised by two hydraulic cylinders arrange | positioned up and down. About the arrangement of the nozzle 13 for spraying the liquid or blowing the gas, as shown in FIG. 1, it is arranged in the middle position between the two cylinders arranged up and down, near the center in the height direction of the short side mold plate, It is preferable to spray the liquid or blow the gas from the nozzle 13 toward the back side of the short side mold plate. The liquid or gas supplied from the nozzle 13 is connected to the short-side frame surface and the short-side frame on the back side of the short-side frame at least in the range from the bottom to the quarter in the height direction of the short-side mold plate. What is necessary is just to reach the made structure. Of course, as shown in FIG. 2, it is good also as spraying a liquid or spraying gas to the whole height direction area | region of the back side of a short side frame.

  When spraying the liquid on the back side of the short side frame, it is important to prevent the initial fixing of the short side mold plate to the lower part on the back side, so it is arranged on the surface and back side of the short side mold plate. What is necessary is just to spread to the extent that the structure surface gets wet. Moreover, when gas is blown to the back side of the short side frame, there is a flow on the surface of the object to be attached (the structure on the back side of the short side mold plate), and it should be blown at a flow rate that moves (floats) the attached substance . The higher the flow rate, the more effective.

  The present invention was applied to a slab continuous casting machine for casting a steel slab having a casting thickness of 250 mm and a casting width of 900 to 1800 mm. The continuous casting mold used is a continuous casting mold in which two short-side mold plates 1 are sandwiched between two long-side mold plates 4 as shown in FIG. 6, and the short-side mold plate 1 is in contact with the molten metal. A short-side driving device 7 for moving the short-side mold plate is connected to the short-side frame 3 and includes a short-side copper plate 2 and a back-side short-side frame 3 that holds the short-side copper plate 2. The long side mold plate 4 also includes a long side copper plate 5 and a long side frame 6 that holds the long side copper plate 5. The short side drive device 7 has two upper and lower hydraulic cylinders connected to the short side frame. The casting direction length of the continuous casting mold is 0.9 m. The two long side mold plates 4 press the two short side mold plates sandwiched between them with a predetermined pressing force by the operation of the long side pressing device 22. The pressing force during casting is 3 to 5 tons.

  In both the inventive example and the comparative example, as shown in FIG. 3, in the space surrounded by the back side of the short side mold plate 1 and the two long side mold plates 4 (short side mold plate back space 12), Water is sprayed on the surface of the long side copper plate using the side copper plate nozzle 14.

  In Invention Examples 1 and 2, water was sprayed as a liquid on the back side of the short side frame. In Example 1 of the present invention, as shown in FIG. 2, the water spray nozzle 13 is arranged above the upper hydraulic cylinder (nozzle 13 a) of the short-side drive device 7 and near the center in the mold height direction (nozzle 13 b). The water was poured over the entire height direction on the back side of the short side mold plate. In Example 2 of the present invention, as shown in FIG. 1, the nozzle 13 for water spraying is arranged at one location near the center in the height direction of the mold, and 1 from the bottom in the height direction on the back side of the short side mold plate. It was decided to apply water for the range of / 4. Water was applied to the surface of the object to be wetted.

  In Example 3 of the present invention, air was blown as a gas on the back side of the short side frame. Air was blown so that a flow was generated on the surface to the extent that no deposits were deposited on the surface of the target.

  In Comparative Example 1, only water was sprayed on the surface of the long side copper plate, and no liquid was sprayed on the back side of the short side frame and no gas was sprayed.

  The effect of the invention was evaluated by evaluating the height of the powder deposited on the back side of the short side frame three months after the start of use of the short side mold plate. The reason for three months is that maintenance and dismantling of the continuous casting mold is performed every three months. And it was judged that the powder deposition height after 3 months was 20 mm or less. If the deposition height exceeds 20 mm in 3 months, the deposit will also accumulate on the side of the short side frame, and the deposit will take part of the pressing force of the long side mold plate. This is because the pressing force to be pressed is reduced and the clamping force is reduced, and the long side copper plate and the side surface of the short side copper plate are not in contact with each other and a gap is generated.

  As a result of evaluation, the powder deposition height on the back side of the short side frame after 3 months was 0 to 1 mm in Invention Example 1, 0 to 4 mm in Invention Example 2, and 0 to 15 mm in Invention Example 3. In Example 1, a result of 50 to 100 mm was obtained.

  In Examples 1 and 2, the powder deposition height after 3 months was 20 mm or less, which was a good range, and the distance between the long side copper plate and the short side copper plate was also below the reference value, and no excessive gap was generated. Compared to Invention Example 1, Invention Example 2 has a slightly higher powder deposition height, but it is a deposition amount at a sufficiently operable level in view of the maintenance cycle. In the first example of the present invention, since the water spray nozzle is also disposed above the hydraulic cylinder on the upper side of the drive device, the take-out position for taking out the water for water spray from the mold cooling water, and the position at which the nozzle is disposed. Adjustment, because it is difficult to spray water over the entire area in the height direction on the back side of the short side mold plate, there was a portion where water was not sprayed. On the other hand, in the second example of the present invention, the water is surely sprayed from the bottom in the height direction in which the deposition occurs in the first quarter, and the powder deposition can be surely prevented.

  In Invention Example 3, the powder deposition height after 3 months was 20 mm or less, which was a good range. However, compared to the liquid, it is difficult to spread over the entire portion (the surface of the structure in the space behind the short side mold plate) that is desired to prevent adhesion, and the amount of deposition is larger than that of the liquid. There was no accumulation in the area where the air was properly blown.

  On the other hand, in Comparative Example 1, 50 to 100 mm of powder deposition was observed on the back side of the short side frame in 3 months, and deposition also progressed on the side surface side of the back frame of the short side mold plate. As the gap between the copper plates increased, the clamping force decreased, leading to poor oscillation synchronization.

  The mold oscillation was evaluated based on the oscillation behavior of the short side mold plate when the long side mold plate was given a sinusoidal oscillation with an amplitude of ± 8 mm and a frequency of 100 cpm. As a result, the long sides and the short sides were synchronized for the inventive examples 1, 2, and 3, and the oscillation was successfully performed for 3 months. However, in the comparative example 1, the synchronization failure occurred for 3 months.

DESCRIPTION OF SYMBOLS 1 Short side mold plate 2 Short side copper plate 3 Short side frame 4 Long side mold plate 5 Long side copper plate 6 Long side frame 7 Short side drive device 8 Cooling water piping 9 Frame 10 Short side support roll 11 Roll 12 Short side mold plate back surface Space 13 Nozzle 14 Long side copper plate nozzle 21 Mold frame 22 Long side pressing device 25 Back face 26 Side face 27 Gap 30 Deposit

Claims (2)

Using a continuous casting mold in which two short-side mold plates are sandwiched between two long-side mold plates, the short-side mold plate is composed of a short-side copper plate in contact with the molten metal and a short-side frame on the back side for holding it, A short-side drive device for moving a short-side mold plate is a method for preventing oscillation failure of the short-side mold plate for continuous casting, wherein the short-side frame is connected to the short-side frame. In addition, the short side driving device connected to the back side of the short side frame, the cooling pipe, and the frame are sprayed with liquid or sprayed with gas, and the method for preventing the oscillation failure of the continuous casting mold short side mold plate . 2. The method of preventing oscillation synchronization failure of a continuous casting mold short side mold plate according to claim 1, wherein the liquid is water or the gas is air.

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