A magnesium alloy smelting and pouring rapid protection device and method

Abstract

The application belongs to the technical field of metal smelting, and particularly relates to a magnesium alloy smelting and pouring rapid protection device and method, wherein the device comprises a control panel, a handle, a gas pipeline and a gas cylinder, the control panel is connected to the gas cylinder and controls the flow rate of the gas cylinder, the gas cylinder is connected to the gas pipeline through the handle, and the bottom of the gas pipeline is provided with a plurality of uniformly distributed gas outlets; the gas cylinder is filled with high-pressure protective gas; and the device further comprises a casting mold supporting plate, and the casting mold supporting plate is provided with a platform for placing a casting mold. The application utilizes high-speed protective gas to rapidly protect the smelting and pouring process, and improves the protective gas covering efficiency through the gas outlets at different angles, so as to form a rapid and multi-directional protective gas layer. The method is very suitable for the smelting and pouring of active metals. The application has low manufacturing cost, and does not need to make a large number of changes to the original metal smelting and pouring process, nor introduce too many new devices.

Description

Technical Field

[0001] This invention belongs to the field of metal smelting technology and relates to a smelting protection device and method for active metal alloys, specifically a rapid protection device and method for magnesium alloy smelting and casting. Background Technology

[0002] In the smelting and casting of magnesium and magnesium alloys, the purity of the molten metal is crucial for defect control and product quality. Due to their reactive chemical properties, magnesium and magnesium alloys readily react with air, producing oxides that contaminate the purity of the molten metal.

[0003] Existing magnesium alloy smelting and casting techniques typically involve covering the molten metal surface with a layer of slag to isolate it from air and prevent contamination. However, the slag itself is a form of contaminant, and hydrogen can still permeate through it and react with the molten magnesium alloy.

[0004] Another method is to cover the surface of the melt with a protective gas, thereby isolating the molten metal from air and preventing contamination. However, during production, the protective gas on the surface of the molten metal can be destroyed for various reasons.

[0005] Patent CN217855530U discloses a protective gas mixing device for magnesium alloy melting and casting. It achieves the function of stably outputting protective gas during the casting process through a mixing gas path, a mixing chamber, a booster gas pump, a casting storage tank, a melting storage tank, a control gas path, a melting mold washing gas path, a self-circulating gas supply module, and a casting gas supply module. However, the device has a complex structure, which leads to cost issues.

[0006] Therefore, there is a need for a method for rapid protection during magnesium alloy smelting and casting, which can quickly form a gas protection on the surface of the magnesium alloy molten metal and repair the damaged protective gas on the surface of the molten metal. Summary of the Invention

[0007] To address the aforementioned issues, this invention provides a rapid protection device and method for magnesium alloy smelting and casting, which can enhance the isolation between molten metal and air, reduce the impact of air on the molten metal during the smelting and casting process, and ultimately achieve high-quality product production.

[0008] The technical solution of the present invention is as follows:

[0009] A rapid protective device for magnesium alloy smelting and casting includes a control panel, a handle, a venting pipe, and a gas cylinder. The control panel is connected to the gas cylinder and controls the flow rate of the gas. The gas cylinder is connected to the venting pipe via the handle. The bottom of the venting pipe has several evenly distributed vent holes. The gas cylinder is filled with high-pressure protective gas. It also includes a casting mold support plate with a platform for placing the casting mold.

[0010] Furthermore, the gas cylinder and the handle are connected by a flexible tube; the ventilation line is a rigid tube.

[0011] Furthermore, the venting pipe includes a straight pipe section and a venting section. The straight pipe section is connected to the handle, and the venting section is connected to the bottom of the straight pipe section. The venting section and the straight pipe section form an obtuse angle. The vent is located on the bottom surface of the venting section.

[0012] Furthermore, the obtuse angle is 120°.

[0013] Furthermore, the venting section has a double-forked structure or a square frame structure.

[0014] Furthermore, the gap in the middle of the bifurcation or square structure is greater than or equal to the surface area of ​​the mold.

[0015] Furthermore, the different air outlets at the bottom of the ventilation pipe have different air outlet angles.

[0016] A rapid protection method for magnesium alloy melting and casting, using the aforementioned rapid protection device for magnesium alloy melting and casting, includes the following steps:

[0017] S1, preheat the crucible;

[0018] S2, place the metal raw material in a preheated crucible for melting, and at the same time begin assembling the casting mold;

[0019] S3. After the mold is assembled, a rapid protection device for magnesium alloy melting and pouring is used to supply gas to the crucible opening to form a gas protective layer.

[0020] S4. After the metal raw material is melted, the mold is placed on the mold tray for pouring, and a rapid protection device for magnesium alloy melting and pouring is used to provide gas protection for the mold.

[0021] S5. After the mold and the castings inside the mold have cooled to room temperature, the castings are obtained.

[0022] Furthermore, in S4, the vent outlet of the vent pipe completely covers the upper surface of the mold.

[0023] The beneficial effects of this invention are as follows:

[0024] 1. This invention utilizes high-speed protective gas to rapidly protect the smelting and casting process through ventilation pipes. By using ventilation holes at different angles, the efficiency of protective gas coverage is improved, forming a rapid, multi-directional protective gas layer. This method is particularly suitable for smelting and casting of reactive metals.

[0025] 2. This invention has low cost, does not require extensive modifications to the original metal smelting and casting process, and does not require the introduction of too many new equipment.

[0026] 3. The entire quick protection device is simple and easy to implement. It can be moved to the appropriate position for protection by hand or mechanical clamping handle. The working moving end of the quick protection device is limited to the air passage, so it is very convenient and flexible to use. The gas cylinder can be disassembled and replaced at any time, extending its service life. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this invention, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the rapid protection method for melting and casting provided by the present invention;

[0029] Figure 2 A schematic diagram of the protective device structure for the rapid protection method for melting and casting provided by the present invention;

[0030] Figure 3 This is a top view of the ventilation pipe of the protective device structure of the present invention;

[0031] Among them, 1—control panel; 2—handle; 3—ventilation pipe; 4—gas cylinder; 5—cast tray. Detailed Implementation

[0032] This section describes embodiments of the present invention, used to explain and illustrate the technical solutions of the present invention. Unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0033] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating directions or positional relationships, are given in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or device referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include more than one of those features. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0034] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integrated connection; they can refer to a mechanical connection or a point connection; they can refer to a direct connection or a connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0035] Example 1:

[0036] A rapid protective device for magnesium alloy melting and casting includes a control panel 1, a handle 2, a vent pipe 3, and a gas cylinder 4. The control panel 1 is connected to the gas cylinder 4 and controls the flow rate of the gas cylinder 4. The gas cylinder 4 is connected to the vent pipe 3 through the handle 2. The bottom of the vent pipe 3 is provided with several evenly distributed vent holes. The gas cylinder 4 is filled with high-pressure protective gas. It also includes a casting mold support plate 5, on which a platform for placing the casting mold is provided.

[0037] Gas cylinder 4 and handle 2 are connected by a flexible tube; ventilation line 3 is a rigid tube.

[0038] The ventilation pipe 3 includes a straight pipe section and a venting section. The straight pipe section is connected to the handle 2, and the venting section is connected to the bottom of the straight pipe section. The venting section and the straight pipe section form an obtuse angle. The vent is located on the bottom surface of the venting section.

[0039] The obtuse angle is 120°.

[0040] The venting section has a double-forked structure or a square frame structure.

[0041] The gap in the middle of the double-forked or square structure is greater than or equal to the surface area of ​​the mold.

[0042] The different air outlets at the bottom of the ventilation pipe 3 have different air outlet angles.

[0043] A rapid protection method for magnesium alloy melting and casting, using the aforementioned rapid protection device for magnesium alloy melting and casting, includes the following steps:

[0044] S1, preheat the crucible;

[0045] S2, place the metal raw material in a preheated crucible for melting, and at the same time begin assembling the casting mold;

[0046] S3. After the mold is assembled, a rapid protection device for magnesium alloy melting and pouring is used to supply gas to the crucible opening to form a gas protective layer.

[0047] S4. After the metal raw material is melted, the mold is placed on the mold tray for pouring, and a rapid protection device for magnesium alloy melting and pouring is used to provide gas protection for the mold.

[0048] S5. After the mold and the castings inside the mold have cooled to room temperature, the castings are obtained.

[0049] In S4, the air outlet of the vent pipe 3 completely covers the upper surface of the mold.

[0050] Example 2:

[0051] To achieve rapid protection during the melting and casting of magnesium alloys, this invention adopts the following technical solution:

[0052] Step 1: Preheat the crucible;

[0053] Step 2: After the crucible is preheated, the metal raw material is placed in the crucible for melting. Simultaneously, the casting mold is assembled.

[0054] Step 3: During the smelting of the metal raw materials and after the mold assembly is completed, a protective gas rapid filling device is used for gas protection.

[0055] Step 4: After melting is completed, place the mold on the mold tray for pouring, and use a protective gas rapid filling device for gas protection;

[0056] Step 5: After the mold and the castings inside the mold have cooled to room temperature, the castings are obtained.

[0057] The cast pallet has an automatic transfer function.

[0058] The surface of the casting tray has anti-slip grooves to increase the friction between the sand mold and the casting tray.

[0059] The handle of the protective gas rapid filling device is made of hard plastic.

[0060] The handle has a heat insulation layer.

[0061] A protective gas cylinder is installed at the handle inlet.

[0062] The handle is at a 120° angle to the ventilation line. This angle is ergonomically designed.

[0063] The ventilation pipe has an inner diameter of 6mm and an outer diameter of 8mm.

[0064] The air outlets on the ventilation pipe are at different angles and are evenly distributed on the ventilation pipe.

[0065] In another aspect, the present invention provides a rapid protection device for magnesium alloy melting and casting, which can be used to perform the above-described rapid protection method for melting and casting.

[0066] In one feasible implementation, the rapid protection device for magnesium alloy melting and casting includes: a control panel 1, a handle 2, a vent pipe 3, a gas cylinder 4, and a casting mold support plate 5; wherein:

[0067] The control panel 1 controls the flow rate of the protective gas in the gas cylinder 4 and simultaneously detects the remaining amount of protective gas in the gas cylinder 4. The handle 2 and the ventilation pipe 3 are placed above the mold and crucible, and the mold support plate 5 is placed below the mold.

[0068] Control panel 1 is used to control the flow rate and monitor the flow of protective gas 4. Handle 2 and vent pipe 3 quickly introduce protective gas onto the surface of the mold and crucible. Mold tray 5 is used to transfer the mold to the designated position for pouring.

Claims

1. A rapid protective device for magnesium alloy melting and casting, characterized in that, It includes a control panel (1), a handle (2), a ventilation pipe (3), and a gas cylinder (4). The control panel (1) is connected to the gas cylinder (4) and controls the flow rate of the gas cylinder (4). The gas cylinder (4) is connected to the ventilation pipe (3) through the handle (2). The ventilation pipe (3) has several evenly distributed vent holes at the bottom. The gas cylinder (4) is filled with high-pressure protective gas. It also includes a casting tray (5), which has a platform for placing the casting mold.

2. The rapid protective device for magnesium alloy melting and casting according to claim 1, characterized in that, The gas cylinder (4) and the handle (2) are connected by a flexible tube; the ventilation pipe (3) is a rigid pipe.

3. The rapid protective device for magnesium alloy melting and casting according to claim 1, characterized in that, The ventilation pipe (3) includes a straight pipe section and a venting section. The straight pipe section is connected to the handle (2), and the venting section is connected to the bottom of the straight pipe section. The venting section and the straight pipe section form an obtuse angle. The vent is located on the bottom surface of the venting section.

4. The rapid protective device for magnesium alloy melting and casting according to claim 3, characterized in that, The obtuse angle is 120°.

5. A rapid protective device for magnesium alloy melting and casting according to claim 3, characterized in that, The venting section has a double-forked structure or a square frame structure.

6. The rapid protective device for magnesium alloy melting and casting according to claim 5, characterized in that, The gap in the middle of the double-forked or square structure is greater than or equal to the surface area of ​​the mold.

7. The rapid protective device for magnesium alloy melting and casting according to claim 1, characterized in that, The different air outlets at the bottom of the ventilation pipe (3) have different air outlet angles.

8. A method for rapid protection during magnesium alloy melting and casting, using a rapid protection device for magnesium alloy melting and casting as described in any one of claims 1-7, characterized in that, Includes the following steps: S1, preheating the crucible; S2, place the metal raw material in a preheated crucible for melting, and at the same time begin assembling the casting mold; S3. After the mold is assembled, a rapid protection device for magnesium alloy melting and pouring is used to supply gas to the crucible opening to form a gas protective layer. S4. After the metal raw material is melted, the mold is placed on the mold tray for pouring, and a rapid protection device for magnesium alloy melting and pouring is used to provide gas protection for the mold. S5. After the mold and the castings inside the mold have cooled to room temperature, the castings are obtained.

9. A rapid protection method for magnesium alloy melting and casting according to claim 8, characterized in that, In S4, the outlet range of the vent pipe (3) completely covers the upper surface of the mold.

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