Magnesium alloy integrated crucible

Abstract

The utility model discloses a magnesium alloy melting and casting integrated type crucible, including crucible body, sealing cover, stirring shaft, the bottom of crucible body is provided with the sealed hole, and the sealed hole is installed with sealed lead block, and the sealed hole is the taper hole, and the diameter of sealed hole upper end is greater than the diameter of sealed hole lower end, and the lateral wall of sealed lead block is the taper surface, and the taper of taper surface is adapted with the taper of sealed hole, and the sealing cover is covered and is installed above the crucible body, and the sealing cover is provided with the air outlet, the gas inlet and the mounting hole, and the stirring shaft is installed in the inner chamber of crucible body through the mounting hole. The device can realize melting and casting integration, need not to carry out step by step to smelt and cast, effectively reduces the cost input of metal alloy melting and casting, improves the casting quality and stability of metal casting, and the device can also realize the safety sealing and solvent-free addition of magnesium alloy melting and casting whole process, is favorable to the smelting and casting quality of high activity rare earth intermediate alloy and magnesium lithium alloy.

Description

Technical Field

[0001] This utility model belongs to the technical field of magnesium alloy production equipment, specifically relating to an integrated magnesium alloy melting and casting crucible. Background Technology

[0002] Traditional magnesium alloy casting processes separate smelting and casting into two steps. Although the casting process employs extensive gas and flux protection, it is still highly susceptible to oxidation inclusions, especially in rare-earth magnesium alloys and magnesium-lithium alloys. The best way to address oxidation inclusions is to use a vacuum furnace for smelting, but this often requires a significant investment of resources. Utility Model Content

[0003] To address some or all of the technical problems existing in the prior art, this utility model provides a magnesium alloy integrated casting crucible, including a crucible body, a sealing cover, and a stirring shaft. The bottom of the crucible body is provided with a sealing hole, and a sealing lead block is installed in the sealing hole. The sealing hole is a conical hole, and the diameter of the upper end of the sealing hole is larger than the diameter of the lower end of the sealing hole. The side wall of the sealing lead block is a conical surface, and the taper of the conical surface is adapted to the taper of the sealing hole. The sealing cover is installed on the top of the crucible body, and the sealing cover is provided with an air extraction port, an air inlet, and a mounting hole. The stirring shaft is installed in the inner cavity of the crucible body through the mounting hole.

[0004] Furthermore, in the above-mentioned magnesium alloy integrated casting crucible, a flange is formed on the upper part of the crucible body, the flange has a plurality of first screw holes, and the sealing cover has a plurality of second screw holes corresponding to the first screw holes. The sealing cover is mounted on the flange, and the second screw holes correspond one-to-one with the first screw holes and bolts are inserted to install the sealing cover on the top of the crucible body.

[0005] Furthermore, in the aforementioned magnesium alloy integrated casting crucible, an annular groove is formed on the top surface of the flange, and a sealing ring is installed in the annular groove.

[0006] Furthermore, in the aforementioned magnesium alloy integral casting crucible, a labyrinth-type sealing structure is provided on the inner circumferential surface of the mounting hole.

[0007] Optionally, in the above-mentioned magnesium alloy integral casting crucible, the stirring shaft is a spiral stirring shaft.

[0008] Optionally, in the above-mentioned magnesium alloy integrated casting crucible, the stirring shaft is a Coulomb disc-shaped stirring shaft.

[0009] Furthermore, in the above-mentioned magnesium alloy integrated casting crucible, the inner wall of the inner cavity of the crucible body is provided with a demolding taper, and the outer wall of the crucible body is provided with a tapered inclination angle.

[0010] Furthermore, in the above-mentioned magnesium alloy integrated casting crucible, the bottom thickness of the crucible body is 20mm, the upper diameter of the sealing hole is 60mm, the taper of the conical surface of the sealing lead block is 65°, the demolding taper of the inner wall of the crucible body is 9°, and the conical inclination angle of the outer wall of the crucible body is 3°.

[0011] The magnesium alloy integrated casting crucible of this invention has the following advantages and beneficial effects:

[0012] (1) It can realize the integration of melting, stirring and casting, and has important application value in the semi-solid forming of magnesium alloys and the dispersion of composite materials. After melting and casting, the entire crucible can be cooled directly without melting and casting in separate steps, which effectively reduces the cost of metal alloy melting and casting, and effectively improves the casting quality and stability of metal castings. In addition, it can realize the safe sealing and solvent-free addition of the entire process of magnesium alloy melting and casting, which is beneficial to the melting and casting quality of high-activity rare earth intermediate alloys and magnesium-lithium alloys.

[0013] (2) By setting a sealing hole at the bottom of the crucible body and installing a sealing lead block, the leakage of molten magnesium alloy during the casting process can be effectively prevented, ensuring safety and material sealing under high temperature operation. The design of the conical sealing hole and the cooperation of the conical sealing lead block make the seal tighter, providing a stronger sealing effect and reducing gas leakage and melt loss.

[0014] (3) By setting up the air extraction port and the air inlet, the internal air pressure of the crucible cavity can be adjusted and the protective gas can be injected, thereby improving the casting quality and stability of the metal casting.

[0015] (4) By setting the demolding taper, it is easier to demold the casting, reduce surface damage to the casting, and improve the forming quality of the casting. By setting a tapered angle on the outer wall of the crucible body, the flow of the melt during the casting process is optimized, the uneven flow and irregular casting defects are reduced, and the casting efficiency and precision are further improved.

[0016] (5) By setting a labyrinth-type sealing structure at the mounting hole, the sealing effect of the sealing cover is increased, preventing melt splashing or gas leakage, and ensuring that the stirring shaft operates safely and stably at high temperature. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for further understanding of the embodiments of this utility model and constitute a part of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings:

[0018] Figure 1 This is a schematic diagram of the integrated magnesium alloy melting and casting crucible of this utility model;

[0019] Figure 2 yes Figure 1 Enlarged diagram of section A in the middle;

[0020] Figure 3 This is a schematic diagram of another type of stirring shaft in the magnesium alloy integrated casting crucible of this utility model.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Crucible body; 2. Sealing cap; 3. Sealing hole; 4. Sealing lead block; 5. Evacuation port; 6. Air inlet; 7. Mounting hole; 8. Stirring shaft; 9. First screw hole; 10. Second screw hole; 11. Sealing ring; 12. Flange. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0024] like Figure 1 As shown, this utility model embodiment provides a magnesium alloy integrated casting crucible, including a crucible body 1, a sealing cover 2, and a stirring shaft 8. The bottom of the crucible body 1 is provided with a sealing hole 3, which is a conical hole. The diameter of the upper end of the sealing hole 3 is larger than the diameter of the lower end of the sealing hole 3. A sealing lead block 4 is installed in the sealing hole 3. The side wall of the sealing lead block 4 is a conical surface, and the taper of the conical surface is adapted to the taper of the sealing hole 3. The sealing cover 2 is installed on the top of the crucible body 1. The sealing cover 2 is provided with an air extraction port 5, an air inlet 6, and a mounting hole 7. The stirring shaft 8 is installed in the inner cavity of the crucible body 1 through the mounting hole 7.

[0025] Preferably, a flange 12 is formed on the upper part of the crucible body 1. The flange 12 has a plurality of first screw holes 9. The sealing cover 2 has a plurality of second screw holes 10 corresponding to the first screw holes 9. The sealing cover 2 is installed on the flange 12 of the crucible body 1. The second screw holes 10 correspond one-to-one with the first screw holes 9 and bolts are inserted to install the sealing cover 2 on the top of the crucible body 1.

[0026] Preferably, the top surface of the flange 12 of the crucible body 1 is provided with an annular groove, and a sealing ring 11 is installed in the annular groove.

[0027] Preferred, such as Figure 2 As shown, a labyrinth-type sealing structure is provided on the inner circumferential surface of the mounting hole 7.

[0028] Preferably, the stirring shaft 8 is a spiral stirring shaft. Of course, the stirring shaft 8 can also be other shapes, such as... Figure 3 The shown is a Coles disc-shaped stirring shaft.

[0029] Preferably, the inner wall of the inner cavity of the crucible body 1 is provided with a demolding taper, and the outer wall of the crucible body 1 is provided with a tapered inclination angle.

[0030] In one specific embodiment, the bottom thickness of the crucible body 1 is 20mm, the upper diameter of the sealing hole 3 is 60mm, the taper of the conical surface of the sealing lead block 4 is 65°, the demolding taper of the inner wall of the crucible body 1 is 9°, and the conical inclination angle of the outer wall of the crucible body 1 is 3°.

[0031] The working principle and beneficial effects of the magnesium alloy integrated casting crucible of this utility model embodiment are as follows:

[0032] When casting magnesium alloy, firstly, the sealing lead block 4 is placed into the crucible body 1 from the top and inserted into the sealing hole 3 to seal the crucible body 1. After sealing, the raw material to be cast is put into the inner cavity of the crucible body 1. After installing the sealing cover 2 and the stirring shaft 8, the air is first evacuated through the evacuation hole 5 to adjust the air pressure inside the crucible body 1. Then, protective gas is introduced into the crucible body 1 through the air inlet 6 to heat the crucible body 1 and stir it with the stirring shaft 8 to complete the melting of the raw material. After melting, the entire crucible is cooled to solidify the molten metal, thus completing the casting of magnesium alloy. Then, the sealing cover 2 is opened and the stirring shaft 8 is removed. The casting is pushed out of the crucible body 1 by applying force to the sealing lead block 4.

[0033] The integrated magnesium alloy melting and casting crucible of this utility model can realize the integration of melting, stirring and casting, and has important application value in the semi-solid forming of magnesium alloys and the dispersion of composite materials. After melting and casting, the entire crucible can be cooled directly without the need to perform melting and casting in separate steps, which effectively reduces the cost of metal alloy melting and casting, and effectively improves the casting quality and stability of metal castings. In addition, it can also realize the safe sealing and solvent-free addition of the entire magnesium alloy melting and casting process, which is beneficial to the melting and casting quality of high-activity rare earth master alloys and magnesium-lithium alloys.

[0034] In the magnesium alloy integrated casting crucible of this utility model embodiment, by setting a sealing hole 3 at the bottom of the crucible body 1 and installing a sealing lead block 4, the leakage of molten magnesium alloy during the casting process can be effectively prevented, ensuring safety and material sealing under high temperature operation. The design of the conical sealing hole 3 and the cooperation of the conical sealing lead block 4 make the seal tighter, providing a stronger sealing effect and reducing gas leakage and melt loss.

[0035] In the magnesium alloy integrated casting crucible of this utility model embodiment, the setting of the air extraction port 5 and the air inlet 6 can realize the regulation of the internal air pressure of the crucible cavity and the injection of protective gas, thereby improving the casting quality and stability of the metal casting.

[0036] In the magnesium alloy integrated casting crucible of this utility model embodiment, the setting of the demolding taper makes it easier to demold the casting, reduces surface damage to the casting, and improves the forming quality of the casting. By setting a tapered inclination angle on the outer wall of the crucible body 1, the flow of the melt during the casting process is optimized, reducing uneven flow and irregular casting defects, and further improving casting efficiency and precision.

[0037] In the magnesium alloy integrated casting crucible of this utility model embodiment, by setting a labyrinth-type sealing structure at the mounting hole 7, the sealing effect of the sealing cover 2 is increased, preventing melt splashing or gas leakage, and ensuring that the stirring shaft 8 operates safely and stably at high temperature.

[0038] It should be noted that, unless otherwise expressly specified and limited, the term "connection" or its synonyms should be interpreted broadly in this document. For example, "connection" can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication of two elements or the interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. Furthermore, expressions such as "first" and "second" are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. At the same time, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. In addition, the terms "front," "rear," "left," "right," "upper," and "lower" in this document refer to the placement state shown in the accompanying drawings.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A magnesium alloy casting crucible, characterized in that, The crucible includes a crucible body (1), a sealing cap (2), and a stirring shaft (8). The bottom of the crucible body (1) is provided with a sealing hole (3). A sealing lead block (4) is installed in the sealing hole (3). The sealing hole (3) is a conical hole. The diameter of the upper end of the sealing hole (3) is larger than the diameter of the lower end of the sealing hole (3). The side wall of the sealing lead block (4) is a conical surface. The taper of the conical surface is adapted to the taper of the sealing hole (3). The sealing cap (2) is installed on the top of the crucible body (1). The sealing cap (2) is provided with an air extraction port (5), an air inlet (6), and a mounting hole (7). The stirring shaft (8) is installed in the inner cavity of the crucible body (1) through the mounting hole (7).

2. The magnesium alloy casting crucible according to claim 1, characterized in that, A flange (12) is formed on the upper part of the crucible body (1). The flange (12) has a plurality of first screw holes (9). The sealing cover (2) has a plurality of second screw holes (10) corresponding to the first screw holes (9). The sealing cover (2) is mounted on the flange (12). The second screw holes (10) correspond one-to-one with the first screw holes (9) and bolts are inserted to install the sealing cover (2) on the top of the crucible body (1).

3. The magnesium alloy casting crucible according to claim 2, characterized in that, The flange (12) has an annular groove on its top surface, and a sealing ring (11) is installed in the annular groove.

4. The magnesium alloy integrated casting crucible according to claim 1, characterized in that, The inner circumferential surface of the mounting hole (7) is provided with a labyrinth-type sealing structure.

5. The magnesium alloy casting crucible according to claim 1, characterized in that, The stirring shaft (8) is a spiral stirring shaft.

6. The magnesium alloy integrated casting crucible according to claim 1, characterized in that, The stirring shaft (8) is a Coles disc-shaped stirring shaft.

7. The magnesium alloy integrated casting crucible according to claim 1, characterized in that, The inner wall of the inner cavity of the crucible body (1) is provided with a demolding taper, and the outer wall of the crucible body (1) is provided with a tapered inclination.

8. The magnesium alloy casting crucible according to claim 7, characterized in that, The bottom thickness of the crucible body (1) is 20mm, the upper diameter of the sealing hole (3) is 60mm, the taper of the conical surface of the sealing lead block (4) is 65°, the demolding taper of the inner wall of the crucible body (1) is 9°, and the conical inclination angle of the outer wall of the crucible body (1) is 3°.

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