Molten metal handling device that can prevent oxidation of magnesium molten metal

Abstract

The present invention relates to a molten metal handling device capable of preventing oxidation of molten magnesium, and more specifically, to a molten metal handling device capable of preventing oxidation of molten magnesium during all processes from melting to pouring, molding, and reprocessing. To this end, the present invention provides a molten metal handling device capable of preventing oxidation of molten magnesium, comprising: a multi-head torch capable of emitting a flame and having a plurality of heads; a multi-head torch support capable of fixing the position of the multi-head torch; an ingot mold capable of manufacturing an ingot by injecting molten metal; a gas injection device capable of injecting gas from above one side of the ingot mold; and a molten metal injection module capable of being coupled to the injection port of the ingot mold.

Description

Technology Field

[0001] The present invention relates to a molten metal handling device capable of preventing oxidation of molten magnesium, and more specifically, to a molten metal handling device capable of preventing oxidation of molten magnesium during all processes from melting to pouring, molding, and reprocessing. Background Technology

[0002] Magnesium (Mg) is included among the low-density metals in commercially available structural alloying elements. Alloy materials containing magnesium possess excellent machinability, high vibration damping ability, excellent absorption of vibration and shock, lightweight properties, and excellent electromagnetic shielding characteristics. For these reasons, their use has recently expanded in components for computers, cameras, mobile phones, and the like.

[0003] Generally, magnesium alloy parts are mostly manufactured by a casting process, which involves heating the metal and pouring the molten liquid material into a mold to solidify and shape it into a specific form. The weight of the ingot is mostly 25 kg, but 100 kg ingots are also cast as needed.

[0004] And in such a casting process, during the process of receiving high-temperature molten metal and pouring it into a mold, the molten metal always exists in a state exposed to the atmosphere.

[0005] Therefore, the high-temperature molten metal reacts with oxygen in the atmosphere and dissolved oxygen to produce oxides and impurities, and the oxides produced here remain in the molten metal, and this molten metal is poured into a mold to be manufactured into an ingot.

[0006] There was a problem where the quality of the ingot deteriorated if such oxides or foreign substances were contained.

[0007] The formation of oxide films can be seen as occurring as molten metal collides with one another during injection.

[0008] These oxide films can degrade the surface quality of the casting during secondary processing and cause damage to mechanical properties.

[0010] Therefore, in order to solve these problems, there is an urgent need to develop means that can prevent oxide film formation and minimize the inclusion of foreign substances.

[0012] Prior Art: KR Registered Patent Publication No. 10-0550445 (Published Feb. 13, 2006) The problem to be solved

[0014] The present invention was devised to solve the above-mentioned problems, and aims to provide a molten metal handling device capable of preventing oxidation of magnesium molten metal, which can inject high-purity molten metal into an ingot mold while preventing oxidation of the molten metal. means of solving the problem

[0015] A molten metal handling device according to the present invention, which can prevent oxidation of molten magnesium, devised to achieve the above objective, comprises: a multi-head torch capable of emitting a flame and having a plurality of heads; a multi-head torch support capable of fixing the position of the multi-head torch; an ingot mold capable of manufacturing an ingot by injecting molten metal; a gas injection device capable of injecting gas from above one side of the ingot mold; and a molten metal injection module that can be coupled to the injection port of the ingot mold.

[0016] In addition, multiple ingot molds may be provided, and each head of the multi-head torch may be fixed at a position corresponding to each ingot mold; the gas injection device may be branched to correspond to the number of ingot molds and may inject gas into each ingot mold.

[0017] In addition, the molten metal injection module further includes a molten metal injection port into which molten metal can be injected, a dam portion formed at a predetermined height from the molten metal injection port, and a baffle formed at a fixed length from the top downward. Effects of the invention

[0018] According to the present invention, by injecting a shielding gas to block oxidation reactions with the atmosphere at high temperatures, the molten magnesium can be prevented from oxidizing.

[0019] In addition, according to the present invention, impurities with a density higher than that of the molten metal are filtered out by the dam, and impurities with a density lower than that of the molten metal are filtered out by the shielding wall, thereby minimizing the inflow of foreign substances. Brief explanation of the drawing

[0020] FIG. 1 is a schematic diagram illustrating the reprocessing of residual ingots using a multi-head torch according to a preferred embodiment of the present invention. FIG. 2 is a schematic drawing illustrating the injection of molten metal into an ingot mold. FIG. 3 is a drawing illustrating the attachment of a molten metal injection module to an ingot mold. FIG. 4 is a plan view illustrating the combination of an ingot mold and a molten metal injection module. FIG. 5 is a side view of FIG. 4, FIG. 6 is a plan view and a cross-sectional view of a molten metal injection module, FIG. 7 is an enlarged cross-sectional view of a molten metal injection module. Specific details for implementing the invention

[0021] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, it should be noted that in assigning reference numerals to the components of each drawing, the same components are given the same reference numeral whenever possible, even if they are shown in different drawings. Furthermore, in describing the present invention, if it is determined that a detailed description of related known components or functions may obscure the essence of the present invention, such detailed description is omitted. Additionally, while preferred embodiments of the present invention will be described below, the technical concept of the present invention is not limited or restricted thereto and can be modified and implemented in various ways by those skilled in the art.

[0023] FIG. 1 is a schematic diagram illustrating the reprocessing of residual ingots using a multi-head torch according to a preferred embodiment of the present invention, FIG. 2 is a schematic diagram illustrating the injection of molten metal into an ingot mold, FIG. 3 is a diagram illustrating the coupling of a molten metal injection module to an ingot mold, FIG. 4 is a plan view illustrating the coupling of an ingot mold and a molten metal injection module, FIG. 5 is a side view of FIG. 4, FIG. 6 is a plan view and cross-sectional view of the molten metal injection module, and FIG. 7 is an enlarged cross-sectional view of the molten metal injection module.

[0025] Hereinafter, with reference to FIGS. 1 to 7, the components of the molten metal handling device capable of preventing oxidation of the molten magnesium according to the present invention will be described in detail.

[0027] A molten metal handling device capable of preventing oxidation of molten magnesium according to a preferred embodiment of the present invention comprises a multi-head torch (100), a multi-head torch support, an ingot mold (200), a gas injection device (300), and a molten metal injection module (400).

[0029] A multi-head torch (100) may be equipped with multiple heads from which flammable gas can be discharged, and may be equipped with an ignition device so that as the gas is discharged, the flammable gas is ignited by the ignition device and discharged in the form of a flame.

[0031] A multi-head torch (100) comprises an integrated gas pipe, multiple branch gas pipes, a torch head, a gas control valve, and an ignition device.

[0033] The integrated gas pipe can be combined with a flexible hose connected to a gas supply module, and gas having a predetermined pressure can be supplied.

[0035] A branch gas pipe may be branched off from the integrated gas pipe in a predetermined number of pipes, and one end of the branch gas pipe may be connected to the integrated gas pipe to supply gas having a predetermined pressure, and the other end may be connected to a torch head and a gas control valve.

[0037] The torch head can discharge gas supplied from the branch gas pipe and is combined with an ignition device to ignite the gas and discharge a high-temperature flame.

[0039] The gas control valve can regulate the amount of gas discharged from the branch gas pipe or prevent gas from being discharged, and can control the intensity of the flame discharged from the torch head by regulating the amount of gas.

[0041] Each head of the multi-head torch (100) is equipped with a control valve that can control the amount of gas discharged, so that the amount of gas discharged from each head can be controlled independently.

[0043] The multi-head torch (100) can heat the ingot mold (200) and the molten metal injection module (400) to remove moisture contained in the ingot mold (200) and the molten metal injection module (400).

[0045] There is a risk of explosion if high-temperature molten metal comes into contact with the surface of an unheated mold that has some moisture, and if the molten metal comes into contact with an unheated ingot mold (200), the reactivity increases, and the possibility of oxides forming on the surface increases significantly.

[0047] In the present invention, the ingot mold (200) molten metal injection module (400) can be heated using a multi-head torch (100) to remove the moisture contained therein, thereby eliminating this risk.

[0049] In addition, when multiple ingot molds (200) are provided, the multi-head torch (100) can have a head positioned at a location corresponding to each ingot mold, and depending on the number of ingot molds (200), a control valve can be used to prevent gas from being discharged from a head located where there is no ingot mold.

[0051] The multi-head torch support can be combined with the multi-head torch and can fix the position of the multi-head torch.

[0053] The multi-head torch support comprises a multi-head torch coupling part, a first column part, a second column part, a fixed part, a movable part, and a fixed part.

[0055] The multi-head torch coupling part can be coupled with the integrated gas pipe of the multi-head torch, and the inner diameter of the multi-head torch coupling part is configured to correspond to the inner diameter of the integrated gas pipe of the multi-head, so that the integrated gas pipe of the multi-head torch can be inserted into and coupled with the multi-head torch coupling part.

[0056] The upper part of the first column is connected to the multi-head torch coupling part, and the lower part is inserted into the second column.

[0057] The second column part is formed with an inner diameter corresponding to the outer diameter of the first column part, so that the first column part can be inserted into the interior of the second column part.

[0058] The second column part can be inserted into the first column part, is provided with a fixed part at the top, and can be coupled with a movable part at the bottom.

[0059] The fixed part can be fixed at the height where the first column part is inserted, and since the multi-head torch coupling part is coupled to the top of the first column part, the height of the multi-head torch coupling part can be adjusted according to the degree of insertion of the first column part.

[0060] In addition, a fixing part is provided so that after adjusting the height of the first column part, the height of the first column part can be fixed using the fixing part.

[0061] The fixing part may be provided in the form of a bolt that is coupled to a threaded part formed by penetrating the second column part, and the height of the first column part can be fixed by rotating the bolt.

[0062] The movable part is connected to the bottom of the fixed part and is equipped with wheels, allowing the multi-head torch to move easily while connected to the multi-head torch support.

[0063] The fixed part can fix the movable wheels provided on the movable part so that they do not rotate, and can prevent the multi-head torch support from moving or changing position while performing work using the multi-head torch.

[0065] The ingot mold (200) can produce an ingot by injecting molten metal, and can reprocess a remaining ingot by heating it using a multi-head torch (100).

[0066] Multiple ingot molds (200) may be provided, and when manufacturing or reprocessing the ingot, a metal plate including an iron plate may be positioned on top.

[0067] The ingot mold (200) has a predetermined length, and a space is formed inside in which molten metal and an ingot for reprocessing can be introduced.

[0068] In the case of injecting molten metal, a molten metal injection module (400) may be connected to the shear, and in the case of reprocessing by injecting residual ingot, the head of a multi-head torch (100) may be positioned.

[0069] A gas injection device (300) is located at the rear end so that the protective gas can be discharged into the space of the ingot mold (200).

[0070] When ingot manufacturing and ingot reprocessing are performed in an ingot mold (200), the front and rear ends are exposed, and the remaining parts excluding the front and rear ends may be covered by a metal plate including an iron plate.

[0071] The gas injection device (300) can inject protective gas at the rear end of the ingot mold.

[0072] The shielding gas is a mixture of carbon dioxide (CO2) and sulfur hexafluoride (SF6) gas, which can shield the molten magnesium from oxidation reactions with the atmosphere at high temperatures to prevent the molten magnesium from being exposed to oxygen and oxidized.

[0073] A protective gas composed of a mixture of carbon dioxide (CO2) and sulfur hexafluoride (SF6) is odorless, non-toxic, non-flammable, and non-explosive, making it suitable for shielding against oxidation reactions with the atmosphere at high temperatures.

[0074] The gas injection device (300) comprises an integrated gas pipe, a plurality of branch gas pipes, a gas discharge section, and a gas control valve.

[0076] The integrated gas pipe can be combined with a flexible hose connected to a protective gas supply module, and protective gas having a predetermined pressure can be supplied.

[0078] A predetermined number of branch gas pipes may be branched from the integrated gas pipe, and one end of each branch gas pipe is connected to the integrated gas pipe so that a protective gas having a predetermined pressure can be supplied, and the other end is each equipped with a gas discharge section.

[0080] The gas discharge section allows for the discharge of protective gas supplied from the branch gas pipe, and is equipped with a gas control valve.

[0082] The gas control valve can regulate the amount of gas discharged from the gas discharge section or prevent gas from being discharged.

[0084] The gas discharge section is equipped with a control valve capable of controlling the amount of gas discharged, so the amount of gas discharged from the head can be controlled independently for each gas discharge section.

[0086] The molten metal injection module (400) is coupled to the front end of the ingot mold (200) so that molten metal can be injected, and comprises a molten metal injection port (410), a dam part (420), a baffle (430), and an ingot mold coupling part (440).

[0087] The molten metal injection port (410) can be used to inject molten metal, and when molten metal is injected, a space is formed in which the molten metal can be stored before being discharged into the ingot mold (200).

[0088] The space where the molten metal is stored before discharge is formed such that the shear can protrude forward at a certain angle, and a downward slope is formed so that the length becomes shorter as it goes downward.

[0089] The rear end of the space where the molten metal is stored before being discharged into the ingot mold (200) is connected to the dam section (420) and is formed with a lower height compared to the front end, so that when the molten metal reaches a certain height or higher, it can be discharged into the ingot mold (200).

[0090] Since the molten metal can be discharged into the ingot mold (200) only when it reaches a certain height or higher by the dam (420), it is possible to prevent impurities with a density higher than that of the molten metal from being discharged into the ingot mold (200) among the remaining molten metal.

[0092] The dam (420) may be provided at the rear end of the space where the molten metal is stored before being discharged, and may be formed with a shape having a predetermined height and gradually decreasing in height as it goes towards the rear.

[0093] When the molten metal flows along the dam section (420) after reaching a certain level in the space where the molten metal is stored, the non-linear flow of the molten metal changes into a linear flow as it passes through the dam section (420), and can be injected into the ingot mold (200) with low potential energy.

[0094] Conventionally, there was a problem in that the material fell directly into the ingot mold, causing rapid turbulence and a high risk of surface oxidation.

[0095] The present invention has the effect of reducing the probability of surface oxidation by injecting the molten metal with low potential energy as it passes through the dam (420) without falling directly into the ingot mold (200), thereby changing the non-linear flow of the molten metal into a linear flow.

[0096] The shielding wall (430) can be formed with a predetermined length downward from the top of the molten metal injection module (400), and the molten metal can flow between the shielding wall (430) and the dam (420).

[0097] The dam (420) can prevent the injection of impurities with a density higher than that of the molten metal, and the shielding wall (430) can prevent the injection of impurities with a density lower than that of the molten metal.

[0098] According to the present invention, the dam section and shielding wall can prevent the inflow of impurities with a density higher than that of the molten metal and impurities with a lower density.

[0099] In addition, oxidation of the molten metal can be prevented by using a shielding gas to block oxidation reactions with the atmosphere at high temperatures.

[0101] The foregoing description is merely an illustrative explanation of the technical concept of the present invention, and those skilled in the art to which the present invention pertains will be able to make various modifications, changes, and substitutions within the scope of the essential characteristics of the present invention. Accordingly, the embodiments disclosed in the present invention and the accompanying drawings are intended to explain, not limit, the technical concept of the present invention, and the scope of the technical concept of the present invention is not limited by such embodiments and accompanying drawings. The scope of protection of the present invention shall be interpreted by the claims below, and all technical concepts within an equivalent scope shall be interpreted as being included within the scope of rights of the present invention. Explanation of the symbols

[0102] 100 - Multi-head torch 200 - Ingot mold 300 - Gas injection device 400 - Molten Metal Injection Module

Claims

Claim 1 A molten metal handling device capable of preventing oxidation of molten magnesium, comprising: a multi-head torch capable of emitting a flame and having multiple heads; a multi-head torch support capable of fixing the position of the multi-head torch; an ingot mold capable of manufacturing an ingot by injecting molten metal; a gas injection device capable of injecting gas from above one side of the ingot mold; and a molten metal injection module capable of being coupled to the injection port of the ingot mold. Claim 2 A molten metal handling device capable of preventing oxidation of molten magnesium, further comprising: in claim 1, a plurality of ingot molds may be provided, and each head of a multi-head torch may be fixed at a position corresponding to each ingot mold; and a gas injection device branched to correspond to the number of ingot molds so as to inject gas into each ingot mold. Claim 3 In paragraph 2, the molten metal injection module further comprises a molten metal injection port into which molten metal can be injected, a dam portion formed at a predetermined height from the molten metal injection port, and a baffle formed with a fixed length from the top downward, a molten metal handling device capable of preventing oxidation of molten magnesium.

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