Extrusion casting device for mold filling of aluminum magnesium alloy

Abstract

The utility model relates to an extrusion casting device for aluminum magnesium alloy mold filling, and belongs to the technical field of metal casting, the extrusion casting device comprises a male die, an operation table, a female die, a smelting furnace and an injection assembly, a supporting frame is arranged on the operation table, a first hydraulic cylinder is arranged on the supporting frame, and the male die is arranged on a hydraulic rod of the first hydraulic cylinder; a feeding cavity is formed in the operation table, the female die is arranged on the operation table, and a feeding hole is formed in the lower end of the female die. A discharge hole is formed in the lower end of the smelting furnace; the injection assembly is arranged in the feeding cavity. The volume of aluminum-magnesium alloy liquid entering the feeding cavity from the smelting furnace is quantitatively controlled through the injection assembly, the aluminum-magnesium alloy liquid in the feeding cavity is injected into the female die through the feeding hole, the male die is driven by the first hydraulic cylinder to apply pressure to the aluminum-magnesium alloy liquid in the female die, and the aluminum-magnesium alloy liquid is subjected to extrusion casting forming; the problem that net forming is difficult to achieve due to the fact that quantitative pouring of the aluminum-magnesium alloy is difficult is effectively solved.

Description

Technical Field

[0001] This application relates to the field of metal casting technology, and particularly relates to an extrusion casting device for filling aluminum-magnesium alloy molds. Background Art

[0002] Aluminum-magnesium alloy generally refers to an aluminum alloy with magnesium as the main additive element, which has the advantages of high strength, low density, good heat dissipation, etc., and is widely used in the fields of electronics, automobiles, aerospace, etc. The casting and forming of aluminum-magnesium alloy mainly adopts extrusion casting; extrusion casting, also known as liquid die forging, is a new metal forming process that combines the characteristics of casting and is similar to die forging. It directly pours a certain amount of molten metal to be cast into a cavity coated with lubricant, and continuously applies mechanical static pressure. Utilizing the easy flowability of metal during casting and solidification and forging technology, it causes the solidified hard shell to undergo plastic deformation, enabling the metal to crystallize and solidify under pressure and forcibly eliminating shrinkage cavities and porosity formed due to solidification shrinkage, so as to obtain liquid die forging parts without casting defects.

[0003] In view of the above related technologies, the inventor found the following defects: When staff pour molten aluminum-magnesium alloy into the cavity, it is difficult to measure the amount of molten aluminum-magnesium alloy, and thus it is difficult to achieve quantitative pouring, resulting in difficulty in achieving net forming of the molten aluminum-magnesium alloy under pressure. Utility Model Content

[0004] In order to improve the problem that it is difficult to quantitatively pour aluminum-magnesium alloy, which leads to difficulty in achieving net forming, this application provides an extrusion casting device for filling aluminum-magnesium alloy molds.

[0005] The extrusion casting device for filling aluminum-magnesium alloy molds provided by this application adopts the following technical solutions:

[0006] An extrusion casting device for filling aluminum-magnesium alloy molds includes a punch, an operating table, a die, a melting furnace, and an injection assembly. A support frame is provided on the operating table, and a first hydraulic cylinder is provided on the support frame. The punch is arranged on the hydraulic rod of the first hydraulic cylinder; a feeding cavity is opened on the operating table, the die is arranged on the operating table, and a feeding hole communicating with the feeding cavity is opened at the lower end of the die; the melting furnace is arranged on the operating table, and a discharging hole communicating with the feeding cavity is opened at the lower end of the melting furnace; the injection assembly is arranged in the feeding cavity, and the injection assembly is used to control the volume of the molten metal entering the feeding cavity from the melting furnace and inject the molten metal in the feeding cavity into the die.

[0007] By adopting the above technical solution, the staff liquefies the aluminum-magnesium alloy in a melting furnace into aluminum-magnesium alloy liquid. The aluminum-magnesium alloy liquid enters the feeding cavity through the discharge hole. At the same time, the volume of the aluminum-magnesium alloy liquid entering the feeding cavity from the melting furnace is controlled by the injection assembly, and the aluminum-magnesium alloy liquid in the feeding cavity is injected into the female mold through the feeding hole, driving the piston rod of the first hydraulic cylinder to extend. At this time, the male mold applies pressure to the aluminum-magnesium alloy liquid in the female mold, so that the aluminum-magnesium alloy liquid fills the mold. By quantitatively controlling the volume of the aluminum-magnesium alloy liquid entering the feeding cavity through the injection assembly, the aluminum-magnesium alloy liquid is quantitatively and net-shaped, effectively improving the problem that it is difficult to achieve net shaping due to the difficulty of quantitatively pouring the aluminum-magnesium alloy; and the aluminum-magnesium alloy liquid enters the female mold through a relatively sealed feeding cavity, effectively preventing the aluminum-magnesium alloy liquid from contacting the air too much and improving the filling effect of the aluminum-magnesium alloy liquid.

[0008] Optionally, the injection assembly includes a second hydraulic cylinder, a third hydraulic cylinder, a first sliding rod and a second sliding rod. The second hydraulic cylinder is arranged at one end of the feeding cavity, the third hydraulic rod is arranged at the other end of the feeding cavity, the first sliding rod is arranged on the piston rod of the second hydraulic cylinder, the second sliding rod is arranged on the piston rod of the third hydraulic cylinder, and the cross-sectional sizes of the first sliding rod and the second sliding rod are the same as the opening size of the feeding cavity.

[0009] By adopting the above technical solution, the staff adjusts the distance between the first sliding rod and the second sliding rod by extending or retracting the piston rods of the second hydraulic cylinder and the third hydraulic cylinder. At this time, the second sliding rod closes the feeding hole. After determining the distance between the first sliding rod and the second sliding rod, since the internal opening size of the feeding cavity is determined, the volume of the aluminum-magnesium alloy liquid entering the feeding cavity is quantified, which is convenient for the staff to quantitatively control the volume of the aluminum-magnesium alloy liquid entering the feeding cavity from the melting furnace; during feeding, control the piston rod of the second hydraulic cylinder to extend and the piston rod of the third hydraulic cylinder to retract, and then push the aluminum-magnesium alloy liquid in the feeding cavity to one end close to the female mold. At this time, the first sliding rod closes the discharge hole. When the piston rod of the third hydraulic cylinder retracts to the end of the second sliding rod away from the third hydraulic cylinder is flush with the side wall of the feeding hole close to the third hydraulic cylinder, the hydraulic cylinder of the third hydraulic cylinder stops retracting, and the piston rod of the second hydraulic cylinder continues to extend, injecting the aluminum-magnesium alloy liquid in the feeding cavity into the female mold through the feeding hole, which is convenient for the staff to inject the aluminum-magnesium alloy liquid in the feeding cavity into the female mold.

[0010] Optionally, push plates are arranged at the ends of the first sliding rod and the second sliding rod close to each other.

[0011] By adopting the above technical solution, the push plates protect the first sliding rod and the second sliding rod, effectively preventing the second sliding rod and the second sliding rod from being corroded or deformed under the influence of the aluminum-magnesium alloy liquid, resulting in deviation in quantifying the aluminum-magnesium alloy liquid entering the feeding cavity.

[0012] Optionally, a closing assembly for closing the discharge hole is provided at the bottom of the melting furnace. The closing assembly includes a plug plate and a connecting rod. A sliding groove is formed in the bottom wall of the melting furnace. The plug plate is slidably inserted into the sliding groove, and the width of the plug plate is greater than the opening diameter of the discharge hole. The connecting rod is rotatably arranged on the plug plate.

[0013] By adopting the above technical solution, when melting the aluminum-magnesium alloy in the melting furnace, the staff pushes the connecting rod towards the side close to the melting furnace, driving the plug plate to slide towards the melting furnace to close the discharge hole, effectively preventing the unliquefied aluminum-magnesium alloy from entering the feeding cavity through the discharge hole and affecting the subsequent filling effect of the aluminum-magnesium alloy liquid.

[0014] Optionally, a spring is arranged on the connecting rod. One end of the spring is connected to the outer side wall of the melting furnace, and the other end is connected to the end of the connecting rod far from the melting furnace. And the spring always has a tendency to drive the connecting rod to move towards the melting furnace.

[0015] By adopting the above technical solution, the spring always drives the connecting rod to move towards the melting furnace, so that the plug plate always closes the discharge hole, effectively improving the closing effect on the discharge hole.

[0016] Optionally, the connecting rod is an L-shaped rod, and a snap ring for snap-fitting with the connecting rod is arranged on the operating platform.

[0017] By adopting the above technical solution, when the discharge hole needs to be opened, the staff pulls the connecting rod away from the melting furnace to make the plug plate away from the discharge hole. At this time, the discharge hole is in an open state, and then the connecting rod is rotated to be snap-fitted into the snap ring, which is convenient for the staff to temporarily fix the connecting rod.

[0018] Optionally, a limiting groove is formed in the support frame, and a sliding block is arranged on the punch. The sliding block slides in the limiting groove.

[0019] By adopting the above technical solution, when the staff drives the punch to move through the first hydraulic cylinder, the sliding block and the limiting groove are in the moving direction of the punch, so that the movement of the punch is more accurate, improving the pressure application accuracy of the aluminum-magnesium alloy liquid in the die.

[0020] Optionally, a limiting rod is slidably inserted through the support frame. A receiving groove is formed in the sliding block, and the limiting rod passes through the support frame and is inserted into the receiving groove.

[0021] By adopting the above technical solution, the punch is fixed by inserting the limiting rod into the receiving groove, effectively preventing the punch from falling and causing harm to the staff during the work of the staff.

[0022] In summary, the present application includes at least one of the following beneficial technical effects:

[0023] 1. The staff liquefies the aluminum-magnesium alloy in a melting furnace to form aluminum-magnesium alloy liquid. The aluminum-magnesium alloy liquid enters the feeding cavity through the discharge hole. At the same time, the injection assembly controls the volume of the aluminum-magnesium alloy liquid entering the feeding cavity from the melting furnace, and injects the aluminum-magnesium alloy liquid in the feeding cavity into the female mold through the feeding hole, driving the piston rod of the first hydraulic cylinder to extend. At this time, the male mold applies pressure to the aluminum-magnesium alloy liquid in the female mold, causing the aluminum-magnesium alloy liquid to fill the mold. By quantitatively controlling the volume of the aluminum-magnesium alloy liquid entering the feeding cavity through the injection assembly, the aluminum-magnesium alloy liquid is quantitatively and net-shaped, effectively improving the problem that it is difficult to achieve net shaping due to the difficulty of quantitatively pouring the aluminum-magnesium alloy. Moreover, the aluminum-magnesium alloy liquid enters the female mold through a relatively closed feeding cavity, effectively preventing the aluminum-magnesium alloy liquid from contacting the air too much and improving the filling effect of the aluminum-magnesium alloy liquid.

[0024] 2. When melting the aluminum-magnesium alloy in the melting furnace, the staff pushes the connecting rod towards the side close to the melting furnace, driving the plug plate to slide towards the melting furnace and closing the discharge hole, effectively preventing the unliquefied aluminum-magnesium alloy from entering the feeding cavity through the discharge hole and affecting the subsequent filling effect of the aluminum-magnesium alloy liquid.

[0025] 3. When the staff drives the male mold to move through the first hydraulic cylinder, the slider and the limiting groove are in the moving direction of the male mold, thereby making the movement of the male mold more accurate and improving the pressure application accuracy to the aluminum-magnesium alloy liquid in the female mold. Description of the Drawings

[0026] Figure 1 is a schematic structural diagram of an extrusion casting device for filling aluminum-magnesium alloy according to an embodiment of the present application.

[0027] Figure 2 is a partial cross-sectional view of an embodiment of the present application.

[0028] Figure 3 is Figure 2 an enlarged schematic view of part A in

[0029] Figure 4 is Figure 2 an enlarged schematic view of part B in

[0030] Reference numerals: 1, male mold; 2, operation table; 21, feeding cavity; 3, female mold; 31, feeding hole; 4, melting furnace; 41, discharge hole; 42, sliding groove; 5, injection assembly; 51, second hydraulic cylinder; 52, third hydraulic cylinder; 53, first sliding rod; 54, second sliding rod; 6, support frame; 61, limiting groove; 7, first hydraulic cylinder; 8, pushing plate; 9, closing assembly; 91, plug plate; 92, connecting rod; 10, spring; 11, snap ring; 12, slider; 121, receiving groove; 13, limiting rod. Detailed Embodiments

[0031] The following will further describe the present application in detail with reference to the accompanying Figures 1-4 drawings.

[0032] An embodiment of the present application discloses an squeeze casting device for filling aluminum-magnesium alloy.

[0033] Referring to Figure 1 and Figure 2 , the squeeze casting device for filling aluminum-magnesium alloy includes a punch 1, an operating table 2, a die 3, a melting furnace 4 and an injection assembly 5. A support frame 6 is installed on the operating table 2, a first hydraulic cylinder 7 is installed on the support frame 6, and the punch 1 is installed on the hydraulic rod of the first hydraulic cylinder 7; a feeding cavity 21 is opened on the operating table 2, the die 3 is installed on the operating table 2, and a feeding hole 31 communicating with the feeding cavity 21 is opened at the lower end of the die 3; the melting furnace 4 is installed on the operating table 2, and a discharging hole 41 communicating with the feeding cavity 21 is opened at the lower end of the melting furnace 4; the injection assembly 5 is installed in the feeding cavity 21, and the injection assembly 5 is used to control the volume of the molten metal entering the feeding cavity 21 from the melting furnace 4 and inject the molten metal in the feeding cavity 21 into the die 3.

[0034] Both the die 3 and the punch 1 can be made of materials such as galvanized steel and high-strength alloy. In this embodiment, both the die 3 and the punch 1 are made of high-strength alloy; the melting furnace 4 can be made of high-temperature-resistant materials such as silicon dioxide and chromium-manganese-nitrogen steel. In this embodiment, the melting furnace 4 is made of silicon dioxide material, which has the characteristics of high temperature resistance, stable chemical properties and high hardness; in this embodiment, the support frame 6 includes two vertical plates and a horizontal plate made of alloy material. The two vertical plates are symmetrically welded on the operating table 2, and both ends of the horizontal plate are fixedly welded to a vertical plate respectively. The cylinder block of the first hydraulic cylinder 7 is fixed on the horizontal plate.

[0035] The staff puts the aluminum-magnesium alloy into the melting furnace 4 to be liquefied into aluminum-magnesium alloy liquid. The aluminum-magnesium alloy liquid enters the feeding cavity 21 through the discharging hole 41. At the same time, the injection assembly 5 quantitatively controls the volume of the aluminum-magnesium alloy liquid entering the feeding cavity 21 from the melting furnace 4, and injects the aluminum-magnesium alloy liquid in the feeding cavity 21 into the die 3 through the feeding hole 31, driving the piston rod of the first hydraulic cylinder 7 to extend. At this time, the punch 1 applies pressure to the aluminum-magnesium alloy liquid in the die 3, so that the aluminum-magnesium alloy liquid fills the mold. By quantitatively controlling the volume of the aluminum-magnesium alloy liquid entering the feeding cavity 21 through the injection assembly 5, the aluminum-magnesium alloy liquid is quantitatively net formed, effectively improving the problem that it is difficult to quantitatively pour the aluminum-magnesium alloy, resulting in difficulty in realizing net forming; and the aluminum-magnesium alloy liquid enters the die 3 through the relatively closed feeding cavity 21, effectively preventing the aluminum-magnesium alloy liquid from contacting with air too much and improving the filling effect of the aluminum-magnesium alloy liquid.

[0036] Referring to Figure 2 and Figure 3, a closing component 9 for closing the discharge hole 41 is installed at the bottom of the melting furnace 4. The closing component 9 includes a plug plate 91 and a connecting rod 92. A sliding groove 42 is formed on the bottom wall of the melting furnace 4. The plug plate 91 is slidably inserted into the sliding groove 42, and the width of the plug plate 91 is greater than the opening diameter of the discharge hole 41. The connecting rod 92 is rotatably installed on the plug plate 91; and the connecting rod 92 is an L-shaped rod. A snap ring 11 for snap-fitting with the connecting rod 92 is installed on the operating platform 2; a spring 10 is installed on the connecting rod 92. One end of the spring 10 is connected to the outer side wall of the melting furnace 4, and the other end is connected to the end of the connecting rod 92 away from the melting furnace 4. And the spring 10 always has a tendency to drive the connecting rod 92 to move towards the melting furnace 4.

[0037] The plug plate 91 can be made of high-temperature resistant materials such as ceramics and chromium-manganese-nitrogen steel. In this embodiment, the plug plate 91 is a rectangular chromium-manganese-nitrogen steel, which has characteristics such as high temperature resistance and high strength; the connecting rod 92 can be made of materials such as galvanized and high-strength alloy. In this embodiment, the connecting rod 92 is a galvanized rod with a circular cross-section; the snap ring 11 is a U-shaped sleeve made of galvanized material.

[0038] When melting the aluminum-magnesium alloy in the melting furnace 4, the worker rotates the connecting rod 92 so that the connecting rod 92 rotates out of the U-shaped sleeve, and then pushes the connecting rod 92 towards the side close to the melting furnace 4. At this time, the connecting rod 92 moves towards the melting furnace 4 under the action of the spring 10, so that the plug plate 91 always closes the discharge hole 41, effectively preventing the unliquefied aluminum-magnesium alloy from entering the feeding cavity 21 through the discharge hole 41 and affecting the filling effect of the subsequent aluminum-magnesium alloy liquid; after the aluminum-magnesium alloy is liquefied, the worker pulls the connecting rod 92 away from the melting furnace 4, and then rotates the connecting rod 92 so that the connecting rod 92 is snap-fitted into the snap ring 11. At this time, the plug plate 91 is away from the discharge hole 41, and the discharge hole 41 is in an open state. The aluminum-magnesium alloy liquid enters the feeding cavity 21 through the discharge hole 41, which is convenient for the worker to open the discharge hole 41.

[0039] Refer to Figure 2 , the injection component 5 includes a second hydraulic cylinder 51, a third hydraulic cylinder 52, a first sliding rod 53 and a second sliding rod 54. The second hydraulic cylinder 51 is installed at one end of the feeding cavity 21, and the third hydraulic rod is installed at the other end of the feeding cavity 21. The first sliding rod 53 is installed on the piston rod of the second hydraulic cylinder 51, and the second sliding rod 54 is installed on the piston rod of the third hydraulic cylinder 52. The cross-sectional sizes of the first sliding rod 53 and the second sliding rod 54 are the same as the opening size of the feeding cavity 21; and push plates 8 are installed at the ends of the first sliding rod 53 and the second sliding rod 54 that are close to each other.

[0040] The first sliding rod 53 and the second sliding rod 54 can be made of materials such as silica, chromium-manganese-nitrogen steel, and high-chromium nickel steel. In this embodiment, both the first sliding rod 53 and the second sliding rod 54 are made of high-chromium nickel steel, and have characteristics such as high temperature resistance and high strength; the pushing plate 8 is a ceramic plate and has characteristics such as high temperature resistance and low thermal conductivity.

[0041] The staff adjusts the distance between the two pushing plates 8 by extending or retracting the piston rods of the second hydraulic cylinder 51 and the third hydraulic cylinder 52. At this time, the second sliding rod 54 closes the feeding hole 31. After determining the distance between the two pushing plates 8, since the internal opening size of the feeding cavity 21 is determined, the volume of the aluminum-magnesium alloy liquid entering the feeding cavity 21 is quantified, which is convenient for the staff to quantitatively control the volume of the aluminum-magnesium alloy liquid entering the feeding cavity 21 from the melting furnace 4; during feeding, the staff controls the piston rod of the second hydraulic cylinder 51 to extend and the piston rod of the third hydraulic cylinder 52 to retract, thereby pushing the aluminum-magnesium alloy liquid in the feeding cavity 21 to one end close to the female mold 3. At this time, the first sliding rod 53 closes the discharging hole 41. When the piston rod of the third hydraulic cylinder 52 retracts to the point where the end of the second sliding rod 54 away from the third hydraulic cylinder 52 is flush with the side wall of the feeding hole 31 close to the third hydraulic cylinder 52, the hydraulic cylinder of the third hydraulic cylinder 52 stops retracting, and the piston rod of the second hydraulic cylinder 51 continues to extend, pressing the aluminum-magnesium alloy liquid in the feeding cavity 21 into the female mold 3 through the feeding hole 31, which is convenient for the staff to inject the aluminum-magnesium alloy liquid in the feeding cavity 21 into the female mold 3; and the pushing plate 8 protects the first sliding rod 53 and the second sliding rod 54, effectively preventing the second sliding rod 54 and the second sliding rod 54 from being corroded or deformed under the influence of the aluminum-magnesium alloy liquid, resulting in deviation in quantifying the aluminum-magnesium alloy liquid entering the feeding cavity 21.

[0042] Refer to Figure 2 、 Figure 4 On the support frame 6, a limiting groove 61 is opened. On the convex mold 1, a slider 12 is installed, and the slider 12 slides in the limiting groove 61; a limiting rod 13 is slidably inserted through the support frame 6. A receiving groove 121 is opened on the slider 12, and the limiting rod 13 passes through the support frame 6 and is inserted into the receiving groove 121; in this embodiment, limiting grooves 61 are opened at both ends of the support frame 6, and sliders 12 are welded to both ends of the convex mold 1. The limiting groove 61 can be in the shape of a T-shaped groove, a dovetail groove, etc. In this embodiment, the limiting groove 61 is a dovetail groove.

[0043] When the staff drives the convex mold 1 to move through the first hydraulic cylinder 7, the slider 12 aligns with the limiting groove 61 in the moving direction of the convex mold 1, thereby making the movement of the convex mold 1 more accurate and improving the pressure application accuracy of the aluminum-magnesium alloy liquid in the female mold 3; and by inserting the limiting rod 13 into the receiving groove 121, the fixing of the convex mold 1 is realized, effectively preventing the convex mold 1 from falling and causing harm to the staff during the work of the staff.

[0044] The implementation principle of an extrusion casting device for aluminum-magnesium alloy filling in an embodiment of this application is as follows: The staff melts the aluminum-magnesium alloy in the furnace 4. At the same time, by extending or retracting the piston rods of the second hydraulic cylinder 51 and the third hydraulic cylinder 52, the distance between the two pusher plates 8 is adjusted. At this time, the volume of the feeding cavity 21 between the two pusher plates 8 is the same as the volume of the required aluminum-magnesium alloy liquid. After the aluminum-magnesium alloy is liquefied, the staff pulls the connecting rod 92 to make the plug plate 91 away from the discharge hole 41, and the aluminum-magnesium alloy liquid enters the feeding cavity 21 from the discharge hole 41. Then, the staff hydraulically injects the aluminum-magnesium alloy liquid in the feeding cavity 21 into the female mold 3 through the second hydraulic cylinder 51 and the third hydraulic cylinder 52, pulls out the limit rod 13, and makes the male mold 1 apply pressure to the aluminum-magnesium alloy liquid in the female mold 3 through the first hydraulic cylinder 7, so that the aluminum-magnesium alloy liquid fills the mold, effectively improving the problem that it is difficult to quantitatively pour the aluminum-magnesium alloy, resulting in difficulty in achieving net forming; and the aluminum-magnesium alloy liquid enters the female mold 3 through the relatively closed feeding cavity 21, effectively preventing the aluminum-magnesium alloy liquid from contacting too much with air and improving the filling effect of the aluminum-magnesium alloy liquid.

[0045] The above are all preferred embodiments of this application. Without restricting the protection scope of this application accordingly, therefore: All equivalent changes made according to the structure, shape, and principle of this application shall be covered within the protection scope of this application.

Claims

1. An squeeze casting device for the filling of aluminum-magnesium alloy, characterized in that: It includes a punch (1), an operating table (2), a die (3), a melting furnace (4) and an injection assembly (5). A support frame (6) is provided on the operating table (2), and a first hydraulic cylinder (7) is provided on the support frame (6). The punch (1) is arranged on the hydraulic rod of the first hydraulic cylinder (7). A feeding cavity (21) is formed on the operating table (2). The die (3) is arranged on the operating table (2), and a feeding hole (31) communicating with the feeding cavity (21) is formed at the lower end of the die (3). The melting furnace (4) is arranged on the operating table (2), and a discharging hole (41) communicating with the feeding cavity (21) is formed at the lower end of the melting furnace (4). The injection assembly (5) is arranged in the feeding cavity (21), and the injection assembly (5) is used to control the volume of the molten metal entering the feeding cavity (21) from the melting furnace (4) and inject the molten metal in the feeding cavity (21) into the die (3).

2. The squeeze casting device for filling aluminum-magnesium alloy according to claim 1, characterized in that: The injection assembly (5) includes a second hydraulic cylinder (51), a third hydraulic cylinder (52), a first sliding rod (53) and a second sliding rod (54). The second hydraulic cylinder (51) is arranged at one end of the feeding cavity (21), the third hydraulic cylinder (52) is arranged at the other end of the feeding cavity (21). The first sliding rod (53) is arranged on the piston rod of the second hydraulic cylinder (51), the second sliding rod (54) is arranged on the piston rod of the third hydraulic cylinder (52), and the cross-sectional sizes of the first sliding rod (53) and the second sliding rod (54) are the same as the opening size of the feeding cavity (21).

3. The squeeze casting device for filling aluminum-magnesium alloy according to claim 2, characterized in that: Pushing plates (8) are arranged at the ends of the first sliding rod (53) and the second sliding rod (54) that are close to each other.

4. The squeeze casting device for filling aluminum-magnesium alloy according to claim 1, characterized in that: A closing assembly (9) for closing the discharging hole (41) is arranged at the bottom of the melting furnace (4). The closing assembly (9) includes an insertion plate (91) and a connecting rod (92). A sliding groove (42) is formed on the bottom wall of the melting furnace (4). The insertion plate (91) is slidably inserted into the sliding groove (42), and the width of the insertion plate (91) is greater than the opening diameter of the discharging hole (41). The connecting rod (92) is rotatably arranged on the insertion plate (91).

5. The squeeze casting device for filling aluminum-magnesium alloy according to claim 4, wherein: A spring (10) is arranged on the connecting rod (92). One end of the spring (10) is connected to the outer side wall of the melting furnace (4), and the other end is connected to the end of the connecting rod (92) away from the melting furnace (4). The spring (10) always has a tendency to drive the connecting rod (92) to move towards the melting furnace (4).

6. The squeeze casting device for filling aluminum-magnesium alloy according to claim 4, characterized in that: The connecting rod (92) is an L-shaped rod, and a clamping ring (11) for clamping and cooperating with the connecting rod (92) is arranged on the operating table (2).

7. An squeeze casting device for filling aluminum-magnesium alloy, according to claim 1, characterized in that: A limiting groove (61) is formed on the support frame (6), and a sliding block (12) is arranged on the punch (1). The sliding block (12) slides in the limiting groove (61).

8. The squeeze casting device for filling aluminum-magnesium alloy according to claim 7, wherein: A limiting rod (13) is slidably inserted through the support frame (6). A receiving groove (121) is formed on the sliding block (12). The limiting rod (13) passes through the support frame (6) and is inserted into the receiving groove (121).

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