Extrusion casting device for high-toughness aluminum alloy

Abstract

The application relates to the field of alloy casting technology, and specifically discloses an extrusion casting device for high-strength and high-toughness aluminum alloy, which comprises a device main body, a hydraulic cylinder, a piston rod, a movable die and a fixed die. The inner wall of the device main body is fixedly installed with the hydraulic cylinder, the inner cavity of the hydraulic cylinder is slidably connected with the piston rod, and the bottom end of the piston rod is fixedly installed with the movable die. The mold can be knocked before demolding through the demolding assembly, the adhesion between the high-strength and high-toughness aluminum alloy casting and the inner wall of the mold is weakened, the casting is prevented from being firmly adhered to the mold cavity and being difficult to separate, the uniform extrusion force is dispersed to multiple contact points through multiple points, local overload is avoided, the overall stress of the casting is ensured to be uniform, the damage to the casting during demolding is reduced, the mold closing pressure real-time monitoring function is realized through the buffer assembly, the pressure abnormal condition in the mold closing process can be accurately captured, and an early warning prompt can be sent in time when an overload fault occurs in the equipment.

Description

Technical Field

[0001] This application relates to the field of alloy casting technology, and in particular to an extrusion casting apparatus for high-strength and high-toughness aluminum alloys. Background Technology

[0002] High-strength and tough aluminum alloys, due to their high specific strength, good lightweight effect, excellent corrosion resistance and fatigue resistance, have been widely used in high-end manufacturing fields such as automobile chassis, aerospace structural components, and rail transit load-bearing components. Extrusion casting combines the advantages of near-net-shape casting and densification in forging, enabling the integrated forming of complex high-strength and tough aluminum alloy components at a lower cost. It is currently the mainstream manufacturing process for high-performance aluminum-based components.

[0003] The existing technology still has the following problems:

[0004] 1. Existing casting equipment mostly uses rigid ejector rods to directly push the surface of the casting. The newly formed casting is prone to adhering to the inner cavity of the mold. The rigidity of the ejector force is too strong, which can easily cause the surface of the casting to sink, deform or even crack, which greatly reduces the yield and surface integrity. In addition, the flow rate is slow during the molten metal filling stage, and air is drawn into the interior of the molten metal to form bubbles. These bubbles will greatly reduce the density of high-strength and tough aluminum alloy castings, and significantly weaken the tensile strength, elongation and impact toughness. They cannot meet the mechanical index requirements of load-bearing components, which seriously affects the production efficiency and product qualification rate of extrusion casting.

[0005] 2. Existing casting equipment lacks a buffer mechanism with an overload alarm. It cannot monitor abnormal pressure in real time during mold closing, and there is no warning when an overload occurs. Operators cannot intervene in time. The instantaneous high pressure will directly impact the mold and the main body of the equipment, causing mold core deformation, cavity cracking and other maintenance, which will significantly shorten the mold life. Moreover, the lack of an alarm mechanism makes it easy for the equipment to operate with defects for a long time, which will aggravate wear, increase energy consumption and maintenance costs, and at the same time pose safety hazards, threatening the safety of on-site personnel and equipment, and seriously affecting production stability and economic benefits.

[0006] Therefore, there is an urgent need to develop a high-strength and high-toughness aluminum alloy extrusion casting device to solve the above problems. Summary of the Invention

[0007] To overcome the shortcomings of existing casting equipment that mostly uses rigid ejector pins to directly push the surface of the casting, which makes the newly formed casting prone to adhering to the inner cavity of the mold, and whose excessively rigid ejection force can easily lead to surface depressions, deformation, or even cracks, significantly reducing the yield and surface integrity, this invention aims to provide a high-strength and high-toughness aluminum alloy extrusion casting device to solve the above-mentioned deficiencies. Furthermore, the slow flow rate during the molten metal filling stage allows air to be drawn into the molten metal, forming bubbles that significantly reduce the density of high-strength and high-toughness aluminum alloy castings, greatly weakening tensile strength, elongation, and impact toughness, failing to meet the mechanical properties required for load-bearing components, and seriously affecting the production efficiency and product qualification rate of extrusion casting. Additionally, the casting equipment lacks a buffer mechanism with an overload alarm, cannot monitor pressure anomalies in real time during mold closing, and provides no warning when an overload occurs, preventing timely intervention by operators. The instantaneous high pressure can directly impact the mold and the main body of the equipment, leading to mold core deformation, cavity cracking, and other maintenance issues, significantly shortening mold life.

[0008] This application provides a high-strength and high-toughness aluminum alloy extrusion casting apparatus, including a main body, a hydraulic cylinder, a piston rod, a moving mold, and a fixed mold. The hydraulic cylinder is fixedly installed on the inner wall of the main body, and the piston rod is slidably connected to the inner cavity of the hydraulic cylinder. The moving mold is fixedly installed at the bottom end of the piston rod. The fixed mold is fixedly installed on the outer surface of the main body, and the moving mold and the fixed mold are flush. A guide rod is fixedly installed on the lower surface of the moving mold, and a guide groove is formed on the upper surface of the fixed mold. When the moving mold moves downward, the guide rod and the guide groove engage. A first limiting rod is fixedly installed on the outer surface of the moving mold. The rod and the inner wall of the equipment body are slidably connected. Buffer components are provided on both sides of the fixed mold. Demolding components are provided in the inner cavity of the fixed mold. Demolding components include demolding templates. A uniform pressing mechanism is provided on the upper surface of the demolding template. A knocking mechanism is provided on both sides of the demolding template. Moving strips are fixedly installed on both sides of the moving mold. Demolding mechanisms are provided at both ends of the demolding template. Demolding modules are slidably connected to the inner cavity of the fixed mold. There are three demolding modules. The top of the demolding module is integrated with the inner cavity of the fixed mold. A second limiting rod is fixedly installed on the inner wall of the fixed mold. The demolding template and the second limiting rod are slidably connected.

[0009] Furthermore, the uniform pressing mechanism includes a connecting plate, which is fixedly connected to the demolding template. The two ends of the connecting plate are rotatably connected to a first rotating bar. A limit sleeve is fixedly installed on the outer surface of the connecting plate. A slider is slidably connected to the inner cavity of the limit sleeve. A second rotating bar is rotatably connected to the inner cavity of the slider. A connecting seat is rotatably connected to the end of the second rotating bar away from the slider. The end of the first rotating bar away from the connecting plate is rotatably connected to the connecting seat. There are three connecting seats. The middle connecting seat is connected by two second rotating bars in an alternating manner. The connecting seats on both sides are connected by the first rotating bar and the second rotating bar in an alternating manner. All three connecting seats are located directly below the three demolding templates.

[0010] Furthermore, the striking mechanism includes a fixed frame, a limiting plate fixedly installed on the inner wall of the fixed frame, a striking rod slidably connected to the inner cavity of the limiting plate, a second connecting ring fixedly installed on the outer surface of the striking rod, an elastic plate slidably connected to the inner cavity of the fixed frame, a pressing block fixedly installed on the outer surface of the elastic plate, a second sliding rod slidably connected to one end of the elastic plate, a third spring sleeved on the outer surface of the second sliding rod, fixed blocks fixedly installed on both sides of the moving bar, and a first protrusion fixedly installed on the outer surface of the fixed blocks.

[0011] Furthermore, the top of the fixed frame is fixedly connected to the inner wall of the fixed mold, the bottom of the striking rod is rounded, the second connecting ring is in contact with the upper surface of the limiting plate, the second sliding rod is fixedly connected to the inner wall of the fixed frame, the third spring is located between the fixed frame and the outer surface of the elastic plate, the side of the elastic plate near the fixed block is rounded, and both the upper and lower ends of the first protrusion are chamfered. When the fixed block moves, it squeezes the elastic plate. When the elastic plate moves on the fixed frame, the squeezing block squeezes the bottom of the striking rod and drives the striking rod to strike the inner wall of the fixed mold.

[0012] Furthermore, the demolding mechanism includes a demolding sleeve, which is fixedly connected to a demolding template. A second protrusion is fixedly installed on both inner walls of the demolding sleeve. The upper and lower ends of the second protrusion are chamfered. A second connecting block is fixedly installed at the bottom of the moving bar. A spring rod is slidably connected to the inner cavity of the second connecting block. A fourth spring is provided in the inner cavities of both ends of the second connecting block. The fourth spring is located between the inner wall of the second connecting block and the spring rod. The end of the spring rod away from the second connecting block is rounded. When the moving bar moves, the spring rod and the second protrusion contact and generate compression.

[0013] Furthermore, the buffer assembly includes a support plate, which is fixedly connected to the outer surface of the fixed mold. A buffer mechanism is provided on the upper surface of the support plate, and an overload monitoring mechanism is provided on the outer surface of the buffer mechanism. A buffer block is fixedly installed on the outer surface of the moving mold.

[0014] Furthermore, the buffer mechanism includes a buffer frame, a fixed rod is fixedly installed on the outer surface of the buffer frame, slide seats are slidably connected to both ends of the fixed rod, limit rings are fixedly installed at both ends of the fixed rod, a first spring is sleeved in the middle part of the fixed rod, a connecting strip is rotatably connected to the inner cavity of the slide seat, and a buffer plate is rotatably connected to the end of the connecting strip away from the slide seat.

[0015] Furthermore, the buffer frame and the support plate are fixedly connected, the first spring is located between the two slides, the slides and the buffer frame are slidably connected, and the buffer plate slides into close contact with the limit ring without external force.

[0016] Furthermore, the overload monitoring mechanism includes a first connecting block, a first sliding rod slidably connected to the inner cavity of the first connecting block, a ball valve movably connected to one end of the first sliding rod, an alarm fixedly installed on the outer surface of the first connecting block, a first connecting ring fixedly installed on the outer surface of the first sliding rod, a button provided on the inner wall of the first connecting block, a second spring sleeved on the outer surface of the first sliding rod, a fixing plate fixedly installed on the outer surface of the support plate, and an inclined block fixedly connected to the outer surface of the fixing plate.

[0017] Furthermore, the middle part of the first connecting block and the buffer plate is fixedly connected, the first connecting ring and the first connecting block are slidably connected, the alarm and the button are electrically connected, and pressing the button controls the alarm to sound an alarm. The second spring is located between the inner wall of the first connecting block and the first connecting ring. The end of the button and the first slide rod away from the ball is close to each other. The ball and the outer surface of the fixed plate are in close contact. When the moving mold and the fixed mold are closed, the ball is located at the junction of the fixed plate and the inclined block.

[0018] The technical solution provided in this application has at least the following technical effects or advantages:

[0019] 1. By employing a demolding assembly, this invention effectively solves the problems inherent in existing casting devices that rely on rigid ejector pins to directly push the casting surface. This often results in the newly formed casting easily adhering to the mold cavity, and excessively rigid ejection forces can easily cause surface depressions, deformation, or even cracks, significantly reducing yield and surface integrity. Furthermore, the slow flow rate during the molten metal filling stage allows air to be drawn into the molten metal, forming bubbles. These bubbles significantly reduce the density of high-strength, high-toughness aluminum alloy castings, drastically weakening tensile strength, elongation, and impact toughness, failing to meet the mechanical properties required for load-bearing components. This severely impacts extrusion casting production efficiency and product qualification rate. This invention addresses these issues. The demolding assembly can tap the mold before demolding, weakening the adhesion between the high-strength and tough aluminum alloy casting and the inner wall of the mold, preventing the casting from sticking firmly to the mold cavity and being difficult to remove. It also distributes the pressure evenly to multiple contact points through multiple points, avoiding local overload and ensuring that the casting is subjected to uniform stress, reducing damage to the casting during demolding. In addition, the slight vibration generated by the tapping during the mold closing process can break the stagnant flow state of the molten metal after filling. The air bubbles are disturbed by the vibration and float to the surface of the liquid metal along the flow channel and are discharged, which greatly reduces the porosity and looseness defects inside the casting, thereby improving the density and molding quality of the casting.

[0020] 2. By employing a buffer component, this invention effectively solves the problem of existing casting equipment lacking a buffer mechanism with an overload alarm. This mechanism cannot monitor pressure anomalies in real time during mold closing, and there are no warnings when overloads occur, preventing timely intervention by operators. Instantaneous high pressure directly impacts the mold and equipment body, leading to mold core deformation, cavity cracking, and other maintenance issues, significantly shortening mold life. Furthermore, the lack of an alarm mechanism allows equipment to operate with defects for extended periods, exacerbating wear, increasing energy consumption and maintenance costs, and posing safety hazards that threaten the safety of personnel and equipment, severely impacting production stability and economic benefits. This invention achieves real-time monitoring of mold closing pressure through a buffer component, accurately capturing pressure anomalies during the mold closing process. It promptly issues warnings when equipment overloads, allowing operators to identify problems and intervene immediately, preventing further malfunctions. This effectively mitigates the rigid impact of instantaneous high pressure on the mold and equipment body, fundamentally preventing mold core deformation, cavity cracking, and other damage, significantly reducing mold wear and effectively extending mold life. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure in Embodiment 1 of this application;

[0022] Figure 2 This is a schematic diagram of the first limiting rod structure in Embodiment 1 of this application;

[0023] Figure 3 This is a schematic diagram of the buffer component structure in Embodiment 1 of this application;

[0024] Figure 4 This is a schematic diagram of the buffer mechanism structure in Embodiment 1 of this application;

[0025] Figure 5 This is a schematic diagram of the first connecting block structure in Embodiment 1 of this application;

[0026] Figure 6 This is a schematic diagram of the cross-sectional structure of the fixed mold in Embodiment 2 of this application;

[0027] Figure 7 This is a schematic diagram of the demolding component structure in Embodiment 2 of this application;

[0028] Figure 8 This is a schematic diagram of the cross-sectional structure of the limiting sleeve in Embodiment 2 of this application;

[0029] Figure 9 This is a schematic diagram of the striking mechanism structure in Embodiment 2 of this application;

[0030] Figure 10 This is Example 2 of this application. Figure 9 Enlarged structural diagram at point A;

[0031] Figure 11This is a schematic diagram of the demolding mechanism structure in Embodiment 2 of this application;

[0032] Figure 12 This is a schematic diagram of the second connecting block structure in Embodiment 2 of this application.

[0033] In the diagram: 1. Main body of the equipment; 2. Hydraulic cylinder; 3. Piston rod; 4. Moving mold; 5. First limit rod; 6. Fixed mold; 7. Buffer assembly; 71. Support plate; 72. Buffer mechanism; 721. Buffer frame; 722. Fixed rod; 723. Slide block; 724. Limit ring; 725. First spring; 726. Connecting bar; 727. Buffer plate; 73. Overload monitoring mechanism; 731. First connecting block; 732. First sliding rod; 733. Ball catcher; 734. Alarm; 735. First connecting ring; 736. Button; 737. Second spring; 738. Fixed plate; 739. Inclined block; 74. Buffer block; 8. Demolding assembly; 81. Demolding template; 8 2. Uniform pressing mechanism; 821. Connecting plate; 822. First rotating bar; 823. Limiting sleeve; 824. Slider; 825. Second rotating bar; 826. Connecting seat; 83. Striking mechanism; 831. Fixing frame; 832. Limiting plate; 833. Striking rod; 834. Second connecting ring; 835. Elastic plate; 836. Extrusion block; 837. Second sliding rod; 838. Third spring; 839. Fixing block; 8310. First protrusion; 84. Moving bar; 85. Demolding mechanism; 851. Demolding sleeve; 852. Second protrusion; 853. Second connecting block; 854. Elastic rod; 855. Fourth spring; 86. Demolding module; 87. Second limiting rod. Detailed Implementation

[0034] For casting equipment, rigid ejector pins are often used to directly push the surface of the casting. Newly formed castings tend to adhere to the inner cavity of the mold. However, excessively rigid ejection force can easily cause surface depressions, deformation, or even cracks in the casting. This invention uses a demolding component to tap the mold before demolding, weakening the adhesion between the high-strength and tough aluminum alloy casting and the inner wall of the mold. This prevents the casting from sticking firmly to the mold cavity and being difficult to detach. Furthermore, by distributing the extrusion pressure evenly to multiple contact points, it avoids local overload and ensures uniform stress on the casting as a whole, reducing damage to the casting during demolding. For casting equipment that lacks a buffer mechanism with an overload alarm, this invention uses a buffer component to achieve real-time monitoring of the mold closing pressure. It can accurately detect abnormal pressure during the mold closing process and issue timely warnings when the equipment experiences an overload fault, allowing operators to detect problems and intervene in an immediate manner.

[0035] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods. Example 1:

[0036] Please see Figure 1 and Figure 2 As shown, a high-strength and high-toughness aluminum alloy extrusion casting device includes a main body 1, a hydraulic cylinder 2, a piston rod 3, a moving mold 4, and a fixed mold 6. The hydraulic cylinder 2 is fixedly installed on the inner wall of the main body 1. The piston rod 3 is slidably connected to the inner cavity of the hydraulic cylinder 2. The moving mold 4 is fixedly installed at the bottom end of the piston rod 3. The fixed mold 6 is fixedly installed on the outer surface of the main body 1. The moving mold 4 and the fixed mold 6 are flush. A guide rod is fixedly installed on the lower surface of the moving mold 4. A guide groove is formed on the upper surface of the fixed mold 6. When the moving mold 4 moves downward, the guide rod and the guide groove engage. A first limiting rod 5 is fixedly installed on the outer surface of the moving mold 4 and is slidably connected to the inner wall of the main body 1. Buffer components 7 are provided on both sides of the fixed mold 6. A demolding component 8 is provided in the inner cavity of the fixed mold 6. During casting, molten metal is poured into the cavity of the fixed mold 6, and the piston rod 3 is driven by the operation of the hydraulic cylinder 2. The movement of the inner cavity of the hydraulic cylinder 2 and the movement of the piston rod 3 drive the moving mold 4 to press down. At this time, the first limit rod 5 slides in the inner cavity of the main body 1 of the equipment to improve the stability of the moving mold 4 during the movement process, so that the moving mold 4 and the fixed mold 6 press together the high temperature molten metal. When the moving mold 4 presses down, the buffer component 7 is used to buffer and issue an early warning when overloaded. The molten metal quickly fills all parts of the cavity with its fluidity and gradually conforms to the mold cavity contour. The molten metal gradually changes from liquid to molten semi-solid. As the heat is continuously dissipated, the molten metal eventually completely solidifies and shrinks to form a casting blank with a complete structure and regular dimensions. The demolding component 8 can flexibly demold the casting to prevent damage to the casting during demolding. It also knocks on the fixed mold 6 during the mold closing and demolding process. When closing the mold, it is used to improve the fluidity of the molten metal and reduce the air bubbles generated inside the casting. Before demolding, knocking on the fixed mold 6 is used to reduce the adhesion between the casting and the inner cavity of the mold.

[0037] Please see Figure 2 and Figure 3 As shown, the buffer assembly 7 includes a support plate 71, which is fixedly connected to the outer surface of the fixed mold 6. A buffer mechanism 72 is provided on the upper surface of the support plate 71, and an overload monitoring mechanism 73 is provided on the outer surface of the buffer mechanism 72. A buffer block 74 is fixedly installed on the outer surface of the moving mold 4. When the moving mold 4 and the fixed mold 6 are extruded and cast, the buffer block 74 is driven to approach the support plate 71 and exert pressure on the buffer mechanism 72. The buffer mechanism 72 can effectively slow down the mold closing speed, balance the mold closing pressure, offset the instantaneous overload impact, and prevent problems such as cavity cracking, core deformation, and mold misalignment caused by excessive pressure, thus effectively extending the service life of the mold. The overload monitoring mechanism 73 can monitor whether there is an overload during the mold closing process in real time, avoid abnormal wear of the equipment caused by overload, and reduce the equipment failure rate and maintenance cost.

[0038] Please see Figure 3 and Figure 4As shown, the buffer mechanism 72 includes a buffer frame 721. A fixing rod 722 is fixedly installed on the outer surface of the buffer frame 721. Both ends of the fixing rod 722 are slidably connected to slide blocks 723. Limit rings 724 are fixedly installed at both ends of the fixing rod 722. A first spring 725 is sleeved on the middle part of the fixing rod 722. A connecting strip 726 is rotatably connected to the inner cavity of the slide block 723. A buffer plate 727 is rotatably connected to the end of the connecting strip 726 away from the slide block 723. The buffer frame 721 and the support plate 71 are fixedly connected. The first spring 725 is located between the two slide blocks 723. The slide blocks 723 and the buffer frame 721 are slidably connected. The buffer plate 727... Without external force, the sliding seat 723 and the limiting ring 724 are in close contact, which limits the sliding seat 723 and allows the buffer plate 727 to buffer in a set position. When the moving mold 4 and the fixed mold 6 are extruded and cast, the buffer block 74 extrudes the buffer plate 727, causing the connecting strip 726 to rotate in the inner cavity of the sliding seat 723. At this time, the sliding seat 723 slides on the buffer frame 721 and extrudes the first spring 725. The elastic force of the first spring 725 is used to buffer the downward pressure of the buffer block 74, that is, to buffer when the moving mold 4 and the fixed mold 6 are closed, so as to avoid excessive instantaneous pressure during the contact process between the moving mold 4 and the fixed mold 6 and protect the equipment.

[0039] Please see Figure 4 and Figure 5As shown, the overload monitoring mechanism 73 includes a first connecting block 731, a first slide rod 732 slidably connected to the inner cavity of the first connecting block 731, a retaining ball 733 movably connected to one end of the first slide rod 732, an alarm 734 fixedly installed on the outer surface of the first connecting block 731, a first connecting ring 735 fixedly installed on the outer surface of the first slide rod 732, a button 736 provided on the inner wall of the first connecting block 731, a second spring 737 sleeved on the outer surface of the first slide rod 732, and a fixing plate 738 fixedly installed on the outer surface of the support plate 71. An inclined block 739 is fixedly connected to the outer surface. The middle part of the first connecting block 731 and the buffer plate 727 are fixedly connected. The first connecting ring 735 and the first connecting block 731 are slidably connected. The alarm 734 and the button 736 are electrically connected, and pressing the button 736 controls the alarm 734 to sound an alarm. The second spring 737 is located between the inner wall of the first connecting block 731 and the first connecting ring 735. The button 736 and the end of the first slide rod 732 away from the ball catcher 733 are close together. The ball catcher 733 and the outer surface of the fixed plate 738 are in close contact. The moving mold 4 and the fixed mold are connected. When the mold is in its 6-part configuration, the ball catcher 733 is located at the junction of the fixed plate 738 and the inclined block 739. When the equipment is overloaded, the downward movement of the buffer plate 727 causes the first connecting block 731 to move downward, causing the ball catcher 733 to move below the junction of the fixed plate 738 and the inclined block 739. At this time, the inclined surface of the inclined block 739 presses against the ball catcher 733, causing the first slide rod 732 to slide inside the cavity of the first connecting block 731. The sliding of the first slide rod 732 causes the first connecting ring 735 to slide inside the cavity of the first connecting block 731 and press against the second spring 737, thus catching the ball. The movement of 733 simultaneously causes the first slide bar 732 to press the button 736, causing the alarm 734 to sound an alarm, thereby realizing the real-time monitoring function of mold closing pressure. It can accurately capture abnormal pressure during the mold closing process and issue timely warnings when the equipment experiences overload failure, making it convenient for operators to discover problems and intervene in the adjustment as soon as possible, preventing the failure from continuing to occur. It effectively alleviates the rigid impact of instantaneous high pressure on the mold and the main body of the equipment 1, and fundamentally avoids damage problems such as mold core deformation and cavity cracking, significantly reducing mold wear and effectively extending the service life of the mold. Example 2:

[0040] Please see Figure 6 and Figure 7As shown, the demolding assembly 8 includes a demolding template 81. A uniform pressing mechanism 82 is provided on the upper surface of the demolding template 81. A striking mechanism 83 is provided on both sides of the demolding template 81. Moving strips 84 are fixedly installed on both sides of the moving mold 4. Demolding mechanisms 85 are provided at both ends of the demolding template 81. Three demolding modules 86 are slidably connected to the inner cavity of the fixed mold 6. The top of each demolding module 86 is integrated with the inner cavity of the fixed mold 6, thus avoiding any impact on the casting formation. A second limiting rod 87 is fixedly installed on the inner wall of the fixed mold 6. The demolding template 81 and the second limiting rod 87 are slidably connected. When the moving mold 4 and the fixed mold 6 are engaged... When the mold is being molded, the moving mold 4 drives the moving strip 84 to move downward, so that the striking mechanism 83 can strike the fixed mold 6, thereby accelerating the flow of molten metal in the cavity of the fixed mold 6 and reducing the flatness caused by the molten metal. When demolding, the demolding mechanism 85 drives the demolding template 81 to move upward and drives the striking mechanism 83 to strike the fixed mold 6 again, reducing the adhesion between the casting and the cavity of the fixed mold 6, so that the demolding template 81 slides on the second limit rod 87. The upward movement of the demolding template 81 drives the uniform pressing mechanism 82 to move upward, and the upward movement of the uniform pressing mechanism 82 drives the uniform pressing mechanism 82 to uniformly squeeze the demolding template 86, thereby preventing damage to the casting.

[0041] Please see Figures 6-12As shown, the uniform pressing mechanism 82 includes a connecting plate 821, which is fixedly connected to the demolding template 81. First rotating bars 822 are rotatably connected to both ends of the connecting plate 821. A limiting sleeve 823 is fixedly installed on the outer surface of the connecting plate 821. A slider 824 is slidably connected to the inner cavity of the limiting sleeve 823. A second rotating bar 825 is rotatably connected to the inner cavity of the slider 824. A connecting seat 826 is rotatably connected to the end of the second rotating bar 825 away from the slider 824. The end of the first rotating bar 822 away from the connecting plate 821 is rotatably connected to the connecting seat 826. There are three connecting seats 826. The middle connecting seat 826 is formed by two staggered connections of the second rotating bars 825, and the connecting seats on both sides are formed by the first rotating bars 822 and the second rotating bars 825. The three connecting seats 826 are staggered and located directly below the three detachable modules 86. The striking mechanism 83 includes a fixed frame 831. A limit plate 832 is fixedly installed on the inner wall of the fixed frame 831. A striking rod 833 is slidably connected to the inner cavity of the limit plate 832. A second connecting ring 834 is fixedly installed on the outer surface of the striking rod 833. An elastic plate 835 is slidably connected to the inner cavity of the fixed frame 831. A pressing block 836 is fixedly installed on the outer surface of the elastic plate 835. A second sliding rod 837 is slidably connected to one end of the elastic plate 835. A third spring 838 is sleeved on the outer surface of the second sliding rod 837. Fixed blocks 839 are fixedly installed on both sides of the moving bar 84. A first protrusion 8310 is fixedly installed on the outer surface of the fixed block 839. The top of the first protrusion 8310 is fixedly connected to the inner wall of the fixed mold 6. The bottom end of the striking rod 833 is rounded. The second connecting ring 834 is in contact with the upper surface of the limiting plate 832. The second sliding rod 837 is fixedly connected to the inner wall of the fixed frame 831. The third spring 838 is located between the outer surface of the fixed frame 831 and the elastic plate 835. The side of the elastic plate 835 near the fixed block 839 is rounded. The upper and lower ends of the first protrusion 8310 are chamfered. When the fixed block 839 moves, it squeezes the elastic plate 835. When the elastic plate 835 moves on the fixed frame 831, the squeezing block 836 squeezes the bottom end of the striking rod 833 and drives the striking rod 833 to strike the inner wall of the fixed mold 6. The demolding mechanism 85 includes a demolding sleeve 851, a demolding sleeve 851 and a demolding... The template 81 is fixedly connected. Second protrusions 852 are fixedly installed on both inner walls of the demolding sleeve 851. The upper and lower ends of the second protrusions 852 are chamfered. A second connecting block 853 is fixedly installed at the bottom end of the moving strip 84. A spring rod 854 is slidably connected to the inner cavity of the second connecting block 853. A fourth spring 855 is provided in the inner cavities at both ends of the second connecting block 853. The fourth spring 855 is located between the inner wall of the second connecting block 853 and the spring rod 854. The end of the spring rod 854 away from the second connecting block 853 is rounded. When the moving strip 84 moves, the spring rod 854 contacts and compresses the second protrusion 852. The elastic force of the fourth spring 855 can cause the demolding template 81 to move upwards as a whole when the second connecting block 853 moves upwards, thus demolding the casting.During the extrusion casting process between the moving mold 4 and the fixed mold 6, the downward movement of the moving mold 4 causes the moving strip 84 to move downward. This downward movement of the moving strip 84 causes the second connecting block 853 and the fixed block 839 to move downward simultaneously. At this time, both ends of the elastic rod 854 contact the second protrusion 852 inside the demolding sleeve 851, causing the elastic rod 854 to compress the fourth spring 855. Thus, the elastic rod 854 passes through the inner cavity of the demolding sleeve 851. Meanwhile, the downward movement of the fixed block 839 causes the first protrusion 8310 to compress the rounded corner of the elastic plate 835, causing the elastic plate 835 to slide within the inner cavity of the fixed frame 831. As the elastic plate 835 moves, the second sliding rod 837 is housed within the inner cavity of the elastic plate 835 and compresses the third spring 838. At this time, the extrusion block 83... The bottom of the six striking rods 833 is squeezed, causing the top of the striking rods 833 to strike the inner wall of the fixed mold 6. This increases the flow rate of the molten metal in the cavity of the fixed mold 6 and reduces the generation of air bubbles during the molten metal forming process. The elastic force of the third spring 838 drives the elastic plate 835 to return to its original position, keeping the second connecting ring 834 and the limiting plate 832 in contact. This achieves the slight vibration generated by the slight striking during the mold closing process, which can break the stagnant flow state of the molten metal after filling. The air bubbles are disturbed by the vibration and rise to the surface of the liquid along the flow channel of the molten metal and are discharged, which greatly reduces the porosity and looseness defects inside the casting, thereby improving the density and forming quality of the casting. When demolding is required, the moving mold 4 separates from the fixed mold 6. At this time, the moving mold 4 moves upward and then... The first protrusion 8310 on the fixed block 839 presses against the rounded corner of the elastic plate 835, causing the striking rod 833 to strike the inner cavity of the fixed mold 6 again, thereby reducing the adhesion between the casting and the inner cavity of the fixed mold 6. As the moving bar 84 moves upward, the elastic rod 854 contacts the second protrusion 852 again. At this time, the elastic rod 854 moves the demolding sleeve 851 upward. The upward movement of the demolding sleeve 851 causes the demolding template 81 to slide on the second limit rod 87. The upward movement of the demolding template 81 causes the connecting plate 821 to move upward, so that the connecting seat 826 contacts the demolding module 86. During the process of the connecting plate 821 pressing against the demolding module 86, the first rotating bar 822 rotates in the inner cavity of the connecting plate 821, cooperating with the second rotating bar 825 to slide. The rotation of the inner cavity of block 824 causes slider 824 to slide within the inner cavity of limiting sleeve 823. This balances the extrusion force exerted by the three connecting seats 826 on the demolding module 86, resulting in uniform demolding force. This allows for tapping of the mold before demolding, weakening the adhesion between the high-strength, high-toughness aluminum alloy casting and the mold's inner wall, preventing the casting from adhering firmly to the mold cavity and becoming difficult to remove. Furthermore, the uniform extrusion force is distributed across multiple contact points, preventing localized overload and ensuring uniform stress on the casting, reducing damage during demolding. As the bottom of connecting seat 826 contacts the inner wall of the fixed mold 6, the elastic rod 854 cannot move upwards. At this point, the elastic rod 854 retracts from the inner cavity of the second connecting block 853 and passes through the inner cavity of the demolding sleeve 851.When the casting and the inner cavity of the fixed mold 6 are tightly adhered, the elastic rod 854 cannot move the demolding sleeve 851 upwards, thus avoiding damage to the casting caused by rigid ejection.

[0042] In summary, during casting, molten metal is poured into the cavity of the fixed mold 6. The operation of the hydraulic cylinder 2 drives the piston rod 3 to move within the cylinder 2. This movement of the piston rod 3 causes the moving mold 4 to press down. At this time, the first limit rod 5 slides within the cavity of the main body 1, improving the stability of the moving mold 4 during its movement. This allows the moving mold 4 and the fixed mold 6 to press together the high-temperature molten metal. When the moving mold 4 presses down, the buffer assembly 7 provides cushioning and issues an overload warning. The demolding assembly 8 can flexibly demold the casting, preventing damage during demolding. During the mold closing and demolding process, it strikes the fixed mold 6 to reduce the adhesion between the casting and the mold cavity. When the moving mold 4 and the fixed mold 6 are pressing together during casting, the buffer block 74 moves closer to the support plate 71 and exerts pressure on the buffer mechanism 72. The buffer mechanism 72 effectively slows down the mold closing speed, balances the mold closing pressure, offsets instantaneous overload impacts, and prevents excessive pressure from causing... This effectively extends the service life of the mold and prevents problems such as cavity cracking, core deformation, and mold misalignment. The overload monitoring mechanism 73 can monitor whether there is an overload during the mold closing process in real time, avoid abnormal wear of the equipment caused by overload, and reduce the equipment failure rate and maintenance costs. When the moving mold 4 and the fixed mold 6 are closed, the moving mold 4 drives the moving strip 84 to move downward, so that the striking mechanism 83 can strike the fixed mold 6, thereby accelerating the flow of molten metal in the cavity of the fixed mold 6 and reducing the flushing caused by the molten metal. When demolding, the demolding mechanism 85 drives the demolding plate 81 to move upward and drives the striking mechanism 83 to strike the fixed mold 6 again, reducing the adhesion between the casting and the cavity of the fixed mold 6, so that the demolding plate 81 slides on the second limit rod 87. The upward movement of the demolding plate 81 drives the uniform pressing mechanism 82 to move upward, and the upward movement of the uniform pressing mechanism 82 drives the uniform pressing mechanism 82 to uniformly squeeze the demolding plate 86, thereby preventing damage to the casting.

[0043] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

[0044] The above description is merely a preferred embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present application, based on the technical solution and concept of the present application, should be covered within the scope of protection of the present application.

Claims

1. A high-strength and high-toughness aluminum alloy extrusion casting device, comprising a main body (1), a hydraulic cylinder (2), a piston rod (3), a moving mold (4), and a fixed mold (6), wherein the hydraulic cylinder (2) is fixedly installed on the inner wall of the main body (1), the piston rod (3) is slidably connected to the inner cavity of the hydraulic cylinder (2), the moving mold (4) is fixedly installed at the bottom end of the piston rod (3), the fixed mold (6) is fixedly installed on the outer surface of the main body (1), the moving mold (4) and the fixed mold (6) are flush, a guide rod is fixedly installed on the lower surface of the moving mold (4), and a guide groove is provided on the upper surface of the fixed mold (6), wherein the guide rod and the guide groove are engaged when the moving mold (4) moves downward, characterized in that, The outer surface of the moving mold (4) is fixedly installed with a first limiting rod (5), the first limiting rod (5) is slidably connected to the inner wall of the equipment body (1), and buffer components (7) are provided on both sides of the fixed mold (6), and demolding components (8) are provided in the inner cavity of the fixed mold (6). The demolding assembly (8) includes a demolding template (81), a uniform pressing mechanism (82) is provided on the upper surface of the demolding template (81), a striking mechanism (83) is provided on both sides of the demolding template (81), a moving strip (84) is fixedly installed on both sides of the moving mold (4), a demolding mechanism (85) is provided at both ends of the demolding template (81), a demolding module (86) is slidably connected to the inner cavity of the fixed mold (6), there are three demolding modules (86), the top of the demolding module (86) and the inner cavity of the fixed mold (6) are integrated, a second limiting rod (87) is fixedly installed on the inner wall of the fixed mold (6), and the demolding template (81) and the second limiting rod (87) are slidably connected.

2. The extrusion casting apparatus for high-strength and high-toughness aluminum alloy as described in claim 1, characterized in that, The uniform pressing mechanism (82) includes a connecting plate (821), which is fixedly connected to the demolding template (81). First rotating bars (822) are rotatably connected to both ends of the connecting plate (821). A limiting sleeve (823) is fixedly installed on the outer surface of the connecting plate (821). A slider (824) is slidably connected to the inner cavity of the limiting sleeve (823). A second rotating bar (825) is rotatably connected to the inner cavity of the slider (824). The second rotating bar (825) is located away from... One end of the slider (824) is rotatably connected to the connecting seat (826). The end of the first rotating bar (822) away from the connecting plate (821) is rotatably connected to the connecting seat (826). There are three connecting seats (826). The middle connecting seat (826) is connected by two second rotating bars (825) in an alternating manner. The connecting seats (826) on both sides are connected by the first rotating bar (822) and the second rotating bar (825) in an alternating manner. All three connecting seats (826) are located directly below the three detachable modules (86).

3. The extrusion casting apparatus for high-strength and high-toughness aluminum alloy as described in claim 1, characterized in that, The striking mechanism (83) includes a fixed frame (831), a limiting plate (832) is fixedly installed on the inner wall of the fixed frame (831), a striking rod (833) is slidably connected to the inner cavity of the limiting plate (832), a second connecting ring (834) is fixedly installed on the outer surface of the striking rod (833), an elastic plate (835) is slidably connected to the inner cavity of the fixed frame (831), a pressing block (836) is fixedly installed on the outer surface of the elastic plate (835), a second sliding rod (837) is slidably connected to one end of the elastic plate (835), a third spring (838) is sleeved on the outer surface of the second sliding rod (837), and fixed blocks (839) are fixedly installed on both sides of the moving bar (84), and a first protrusion (8310) is fixedly installed on the outer surface of the fixed block (839).

4. The extrusion casting apparatus for high-strength and high-toughness aluminum alloy as described in claim 3, characterized in that, The top of the fixed frame (831) is fixedly connected to the inner wall of the fixed mold (6). The bottom end of the striking rod (833) is rounded. The second connecting ring (834) is in contact with the upper surface of the limiting plate (832). The second sliding rod (837) is fixedly connected to the inner wall of the fixed frame (831). The third spring (838) is located between the outer surface of the fixed frame (831) and the elastic plate (835). The side of the elastic plate (835) near the fixed block (839) is rounded. The upper and lower ends of the first protrusion (8310) are chamfered. When the fixed block (839) moves, it squeezes the elastic plate (835). When the elastic plate (835) moves on the fixed frame (831), the squeezing block (836) squeezes the bottom end of the striking rod (833) and drives the striking rod (833) to strike the inner wall of the fixed mold (6).

5. The extrusion casting apparatus for high-strength and high-toughness aluminum alloy as described in claim 1, characterized in that, The demolding mechanism (85) includes a demolding sleeve (851), which is fixedly connected to a demolding template (81). A second protrusion (852) is fixedly installed on both sides of the inner wall of the demolding sleeve (851). The upper and lower ends of the second protrusion (852) are chamfered. A second connecting block (853) is fixedly installed at the bottom end of the moving bar (84). A spring rod (854) is slidably connected to the inner cavity of the second connecting block (853). A fourth spring (855) is provided in the inner cavity of both ends of the second connecting block (853). The fourth spring (855) is located between the inner wall of the second connecting block (853) and the spring rod (854). The end of the spring rod (854) away from the second connecting block (853) is rounded. When the moving bar (84) moves, the spring rod (854) contacts the second protrusion (852) and generates compression.

6. The extrusion casting apparatus for high-strength and high-toughness aluminum alloy as described in claim 1, characterized in that, The buffer assembly (7) includes a support plate (71), which is fixedly connected to the outer surface of the fixed mold (6). A buffer mechanism (72) is provided on the upper surface of the support plate (71), and an overload monitoring mechanism (73) is provided on the outer surface of the buffer mechanism (72). A buffer block (74) is fixedly installed on the outer surface of the moving mold (4).

7. The extrusion casting apparatus for high-strength and high-toughness aluminum alloy as described in claim 6, characterized in that, The buffer mechanism (72) includes a buffer frame (721), a fixed rod (722) is fixedly installed on the outer surface of the buffer frame (721), a slide block (723) is slidably connected to both ends of the fixed rod (722), a limit ring (724) is fixedly installed at both ends of the fixed rod (722), a first spring (725) is sleeved in the middle part of the fixed rod (722), a connecting strip (726) is rotatably connected to the inner cavity of the slide block (723), and a buffer plate (727) is rotatably connected to the end of the connecting strip (726) away from the slide block (723).

8. The extrusion casting apparatus for high-strength and high-toughness aluminum alloy as described in claim 7, characterized in that, The buffer frame (721) and the support plate (71) are fixedly connected. The first spring (725) is located between two slides (723). The slides (723) and the buffer frame (721) are slidably connected. The buffer plate (727) slides down the slide (723) and the limiting ring (724) in close contact without external force.

9. The extrusion casting apparatus for high-strength and high-toughness aluminum alloy as described in claim 7, characterized in that, The overload monitoring mechanism (73) includes a first connecting block (731), a first slide rod (732) is slidably connected to the inner cavity of the first connecting block (731), a ball valve (733) is movably connected to one end of the first slide rod (732), an alarm (734) is fixedly installed on the outer surface of the first connecting block (731), a first connecting ring (735) is fixedly installed on the outer surface of the first slide rod (732), a button (736) is provided on the inner wall of the first connecting block (731), a second spring (737) is sleeved on the outer surface of the first slide rod (732), a fixing plate (738) is fixedly installed on the outer surface of the support plate (71), and an inclined block (739) is fixedly connected to the outer surface of the fixing plate (738).

10. The extrusion casting apparatus for high-strength and high-toughness aluminum alloy as described in claim 9, characterized in that, The first connecting block (731) and the buffer plate (727) are fixedly connected in the middle. The first connecting ring (735) and the first connecting block (731) are slidably connected. The alarm (734) and the button (736) are electrically connected. Pressing the button (736) controls the alarm (734) to sound an alarm. The second spring (737) is located between the inner wall of the first connecting block (731) and the first connecting ring (735). The button (736) and the first slide bar (732) are close to each other at the end away from the ball (733). The ball (733) and the outer surface of the fixed plate (738) are in close contact. When the moving mold (4) and the fixed mold (6) are closed, the ball (733) is located at the junction of the fixed plate (738) and the inclined block (739).

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