Metal and alloy melt casting buffer device and casting device

Abstract

The utility model discloses a metal and alloy melt casting buffer device and a casting device. The metal and alloy melt casting buffering device and the casting device comprise a support and a melt buffering assembly. The support comprises an upper surface inclined to the horizontal plane. The melt buffer assembly comprises a guide plate, the guide plate is arranged on the upper surface of the support, the two ends of the guide plate comprise a melt pouring end and a melt flowing-out end which are sequentially arranged in the gravity direction and the melt flowing direction, and a buffer structure located between the melt pouring end and the melt flowing-out end. The melt buffering assembly with the buffering structure is additionally arranged on the upper portion of the die, the flowing speed of melt is changed, kinetic energy of the melt falling into the die is reduced, and therefore the taking-in quantity of air holes is reduced, and the internal quality of cast ingots is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of nonferrous metal and alloy smelting and casting, and more specifically, to a metal and alloy molten casting buffer device and a casting device. Background Art

[0002] When nonferrous metals and alloys are melted and cast, there is a certain spatial distance between the melt and the solidified shape. The continuous casting process is generally used for the melting and casting of aluminum alloys of certain grades. The melt gradually solidifies and forms after passing through the crystallizer. The flow rate of the melt is relatively uniform and there is no drop. For high-melting-point metals and alloys, especially in the case of vacuum casting to prepare a single ingot, the metal or alloy melt is directly cast into the mold in the smelting area, and then cooled and formed to obtain an ingot. In this process, there is a certain drop between the melt and the ingot. Under the action of gravity, the liquid will form a small range of sputtering in the mold, thereby bringing gas into the ingot. If it is not floated up and discharged in time, it will cool with the ingot to form internal pores, resulting in internal defects in the metal or alloy ingot, thereby affecting downstream applications or processing.

[0003] Therefore, how to provide a metal and alloy molten metal casting buffer device and casting device that can change the flow rate of the molten metal, reduce the kinetic energy of the molten metal falling into the mold, thereby reducing the amount of pores brought into the mold and improving the internal quality of the ingot has become a technical problem that urgently needs to be solved in this field. Utility Model Content

[0004] The utility model aims to provide a metal and alloy molten casting buffer device and a casting device which can change the flow rate of molten liquid and reduce the kinetic energy of the molten liquid falling into a mold.

[0005] The first aspect of the utility model provides a metal and alloy molten casting buffer device, comprising a bracket and a molten buffer assembly; the bracket comprises an upper surface inclined to a horizontal plane; the molten buffer assembly comprises a guide plate, the guide plate is arranged on the upper surface of the bracket, the two ends of the guide plate include a molten pouring end and a molten outflow end arranged in sequence along the direction of gravity and along the direction of molten flow, and a buffer structure located between the molten pouring end and the molten outflow end.

[0006] Optionally, the buffer structure includes a plurality of buffer grooves recessed in the upper surface of the guide plate and arranged sequentially on the guide plate along the flow direction of the melt.

[0007] Optionally, the buffer groove is a strip-shaped groove, and the length direction of the strip-shaped groove is perpendicular to the flow direction of the melt.

[0008] Optionally, a plurality of strip-shaped grooves are distributed in sequence and at equal intervals on the guide plate along the flow direction of the melt.

[0009] Optionally, the inner surface of the strip-shaped groove is a curved surface.

[0010] Optionally, the guide plate is made of graphite or tungsten-molybdenum.

[0011] Optionally, the bracket has a heating structure, which includes a heating rod arranged below the upper surface and a heat insulation baffle located below the heating rod.

[0012] Optionally, the upper surface of the bracket is a hollow structure;

[0013] And / or, the bracket includes a telescopic structure that can be telescoped along the width direction of the upper surface, and the telescopic structure is used to adjust the width of the upper surface;

[0014] The width direction of the upper surface is perpendicular to the melt flow direction.

[0015] Optionally, the melt buffer assembly further comprises a connecting piece, which is arranged at the melt pouring end of the guide plate, and the guide plate and the bracket are detachably connected via the connecting piece.

[0016] The second aspect of the utility model provides a metal and alloy molten casting device, comprising a metal and alloy molten casting buffer device and a mold according to any one of the first aspects of the utility model; a bracket is arranged above the mold, and a molten buffer assembly is installed on the upper surface of the bracket; from a top-down perspective, the molten pouring end and the molten outflow end of the buffer assembly are both located above the mold, and the molten outflow end faces an inner wall on one side of the mold, and a preset distance is left in the horizontal direction from the inner wall.

[0017] According to the technical content disclosed in the utility model, the following beneficial effects are achieved:

[0018] The metal and alloy molten casting buffer device provided by the utility model can be arranged above the mold. By adding a molten buffer component with a buffer structure on the upper part of the mold, the flow rate of the molten liquid is changed, and the kinetic energy of the molten liquid falling into the mold is reduced, thereby reducing the amount of air brought into the pores and improving the internal quality of the ingot. The metal and alloy molten liquid is poured out from the smelting area at an angle, and the molten liquid falls onto the guide plate. The buffer structure on the guide plate changes the flow direction and speed of the molten liquid, and the molten liquid flows down toward the side of the mold along the inclined direction of the guide plate, and finally accumulates on the side of the mold and spreads to the other side of the mold, solidifying into an ingot. The molten liquid flows in one direction in the mold, and a protective film is formed on the surface. The molten liquid brings in less gas, and it will not spread on a large scale in the ingot, and the internal quality of the ingot is greatly improved.

[0019] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.

[0021] Figure 1 This is a structural diagram of the metal and alloy molten casting device of the utility model.

[0022] Figure 2 This is a structural diagram of the buffer groove of the utility model.

[0023] Figure 3 It is a top view of the bracket of the present utility model.

[0024] Explanation of the reference numerals: 1. mold; 2. bracket; 3. heat insulation baffle; 4. heating rod; 5. guide plate; 51. melt pouring end; 52. melt outflow end; 53. buffer groove; 6. fixing bolt; 7. gasket. DETAILED DESCRIPTION

[0025] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0026] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present invention, its application, or uses.

[0027] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0028] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0029] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0030] The utility model mainly adds a buffer device on the upper part of the mold 1 to change the flow rate of the molten liquid, reduce the kinetic energy of the molten liquid falling into the mold, thereby reducing the amount of air holes brought in and improving the internal quality of the ingot.

[0031] See also Figure 1 The embodiment of the utility model discloses a metal and alloy molten casting device, including a metal and alloy molten casting buffer device, a mold and a gasket; wherein the metal and alloy molten casting buffer device includes a bracket and a molten liquid buffer component.

[0032] The mold 1 is placed above the gasket; the bracket 2 is placed above the mold to support the melt buffer assembly, so that the melt buffer assembly forms a preset angle with the horizontal plane, and the preset angle is 25 to 35 degrees, preferably 30 degrees. The melt buffer assembly is provided with a buffer structure. When the metal and alloy melt is tiltedly poured out from the smelting area and the melt falls on the melt buffer assembly, the melt buffer assembly blocks the melt in the flow direction of the melt to slow down the flow speed of the melt.

[0033] Specifically, the support 2 includes an upper surface inclined to the horizontal plane; the melt buffer assembly includes a guide plate 5, the guide plate 5 is arranged on the upper surface of the support 2, and the two ends of the guide plate 5 include a melt pouring end 51 and a melt outflow end 52 arranged in sequence along the gravity direction and along the melt flow direction, and a buffer structure located between the melt pouring end 51 and the melt outflow end 52. The buffer structure is a plurality of buffer grooves 53 recessed in the upper surface of the guide plate 5 and arranged in sequence on the guide plate 5 along the melt flow direction. The buffer groove 53 is a strip groove, and the length direction of the strip groove is perpendicular to the melt flow direction. The plurality of strip grooves are distributed in sequence and equidistantly on the guide plate along the melt flow direction. Preferably, the inner surface of the strip groove is a curved surface, and in this embodiment, the curved surface is a semicircular curved surface. From a top view, the melt pouring end and the melt outflow end of the buffer assembly are both located above the mold, and the melt outflow end faces the inner wall of one side of the mold, and a preset distance is left in the horizontal direction from the inner wall.

[0034] Combination Figure 1 and Figure 3 The bracket 2 is a telescopic bracket including a telescopic structure that can be telescoped along the width direction of the upper surface. The telescopic structure is used to adjust the width of the upper surface to adapt to molds and guide plates of different sizes. It should be noted that in this embodiment, the width direction of the upper surface is perpendicular to the flow direction of the molten liquid. The bracket 2 also has a heating structure, which includes a heating rod 4 disposed below the upper surface of the bracket 2 and a heat-insulating baffle 3 located below the heating rod 4. Preferably, the upper surface of the bracket 2 is a hollow structure. Specifically, the bracket 2 adopts a hollow inclined bracket, the width of which changes with the mold, and is finally placed on the upper part of the mold to prevent the guide plate 5 from falling into the mold. A heating rod 4 is provided at the bottom of the inclined surface, and the temperature of the inclined surface can be increased by powering on. The lower part of the heating rod is connected to the bracket 2 by a heat-insulating baffle 3.

[0035] Combination Figure 1 and Figure 2Furthermore, in this embodiment, the buffer groove 53 of the guide plate 5 is made of high temperature resistant material, preferably graphite or tungsten molybdenum and other high temperature resistant products, with a groove in the middle, the bottom is in contact with the inclined surface of the top of the bracket 2, and the upper part is fixed with a fixing bolt 6 to fix the buffer groove and the bracket to prevent the impact force generated during the molten casting process from bringing the buffer groove 53 into the mold and affecting the quality of the ingot. The fixing bolt 6 is a connecting piece of the utility model, which is arranged at the molten casting end 51 of the guide plate 5, and the guide plate 5 and the bracket are detachably connected through the connecting piece.

[0036] The metal and alloy molten metal is poured out from the smelting area at an angle, and the molten metal falls into the buffer groove 53 of the molten metal pouring end 51, changing the flow direction and speed of the molten metal, and flows down toward the molten metal outflow end 52, i.e., the side of the mold 1, along the arrangement direction of the buffer groove 53, and finally accumulates on the side of the mold 1 and spreads to the other side of the mold 1, solidifying into an ingot. Heating the buffer groove 53 can effectively prevent the molten metal from solidifying and clogging in the buffer groove 53. The molten metal flows in one direction in the mold, and a protective film is formed on the surface. The molten metal brings in less gas, and will not spread in the ingot on a large scale, and the internal quality of the ingot is greatly improved.

[0037] Comparative Example:

[0038] 1. Production and preparation of nickel alloys. After surface treatment, the internal pores of the directly cast nickel alloy can be visually observed. They are distributed on both sides of the molten casting position, with a large number and uneven distribution. After surface treatment, only a small number of pores are found at the molten inflow point of the ingot cast using the metal and alloy molten casting buffer device, and no pores are found on the other side, and the quality of the ingot is significantly improved.

[0039] 2. Production and preparation of silicon alloys. After surface treatment, directly cast silicon alloys have a large number of internal pores and deep holes, making it difficult to process sheet products that meet the needs. Ingots cast using a metal and alloy molten casting buffer device have no obvious pores after surface treatment, and the product qualification rate is greatly improved.

[0040] 3. Production and preparation of rare earth metal targets. Directly cast rare earth metal ingots have large shrinkage cavities at the casting site and a certain number of pores on both sides. Ingots cast using a metal and alloy molten metal casting buffer device have reduced shrinkage cavities at the casting site and only 1-2 pores are found. The overall ingot quality meets the requirements of target material preparation and processing.

[0041] In summary, the metal and alloy molten casting buffer device provided by the utility model changes the flow rate of the molten liquid and reduces the kinetic energy of the molten liquid falling into the mold by adding a molten liquid buffer component with a buffer structure on the upper part of the mold, thereby reducing the amount of air brought into the pores and improving the internal quality of the ingot. The metal and alloy molten liquid is poured out from the smelting zone at an angle, and the molten liquid falls onto the guide plate. The buffer structure on the guide plate changes the flow direction and speed of the molten liquid, and the molten liquid flows down toward the side of the mold along the inclined direction of the guide plate, and finally accumulates on the side of the mold and spreads to the other side of the mold, solidifying into an ingot. The molten liquid flows in one direction in the mold, and a protective film is formed on the surface. The molten liquid brings in less gas, and it will not spread on a large scale in the ingot, so the internal quality of the ingot is greatly improved.

[0042] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A metal and alloy molten casting buffer device, characterized in that: include: Support and melt buffer assembly; The support comprises an upper surface inclined to a horizontal plane; The melt buffer assembly includes a guide plate, which is arranged on the upper surface of the bracket. The two ends of the guide plate include a melt pouring end and a melt outflow end which are arranged in sequence along the gravity direction and along the melt flow direction, and a buffer structure located between the melt pouring end and the melt outflow end.

2. The metal and alloy molten casting buffer device according to claim 1, characterized in that: The buffer structure includes a plurality of buffer grooves recessed on the upper surface of the guide plate and arranged in sequence on the guide plate along the flow direction of the molten metal.

3. The metal and alloy molten casting buffer device according to claim 2, characterized in that: The buffer groove is a strip-shaped groove, and the length direction of the strip-shaped groove is perpendicular to the flow direction of the molten liquid.

4. The metal and alloy molten casting buffer device according to claim 3, characterized in that: The plurality of strip-shaped grooves are distributed on the guide plate in sequence and at equal intervals along the flow direction of the molten liquid.

5. The metal and alloy molten casting buffer device according to claim 3, characterized in that: The inner surface of the strip-shaped groove is a curved surface.

6. The metal and alloy molten casting buffer device according to any one of claims 1 to 5, characterized in that: The guide plate is made of graphite or tungsten-molybdenum.

7. The metal and alloy molten casting buffer device according to any one of claims 1 to 5, characterized in that: The bracket has a heating structure, which includes a heating rod arranged below the upper surface and a heat insulation baffle located below the heating rod.

8. The metal and alloy molten casting buffer device according to any one of claims 1 to 5, characterized in that: The upper surface of the bracket is a hollow structure; And / or, the bracket includes a telescopic structure that can be telescoped along the width direction of the upper surface, and the telescopic structure is used to adjust the width of the upper surface; The width direction of the upper surface is perpendicular to the melt flow direction.

9. The metal and alloy molten casting buffer device according to any one of claims 1 to 5, characterized in that: The molten liquid buffer assembly further comprises a connecting piece, wherein the connecting piece is arranged at the molten liquid pouring end of the guide plate, and the guide plate is detachably connected to the brackets via the connecting piece.

10. A metal and alloy molten casting device, characterized in that: It comprises a metal and alloy molten casting buffer device and a mold as described in any one of claims 1 to 9; the bracket is arranged above the mold, and the molten liquid buffer assembly is installed on the upper surface of the bracket; From a top view, the molten metal pouring end and the molten metal outflow end of the buffer component are both located above the mold, and the molten metal outflow end faces an inner wall of one side of the mold and has a preset distance from the inner wall in the horizontal direction.

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