Die-casting device for die-casting aluminum alloy forgings for ships

Abstract

The invention relates to the technical field of die-casting of ship aluminum alloy forgings, and particularly discloses a die-casting device for die-casting aluminum alloy forgings for ships, which comprises a die-casting device, a shaping device and a suction device, and the die-casting device can perform die-casting on molten aluminum alloy; the shaping device is arranged in the middle of the die-casting device and extends upwards by a part, and the shaping device can be matched with the die-casting device so as to shape the semi-solid aluminum alloy and flatten the top of the semi-solid aluminum alloy; the suction device is arranged in the center of the right end of the middle of the die-casting device, can suck waste gas in a cavity of the die-casting device and can also be matched with the shaping device to suck waste gas in the cavity for the second time, and the quality of the aluminum alloy forgings is improved; the problem of finished product air holes is solved through double exhaust gas suction, precise shaping is achieved through collaborative design, multi-structure reinforced sealing guarantees stable die casting, and the finished product quality, size precision and durability of the ship aluminum alloy porthole frame are remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of die casting technology for marine aluminum alloy forgings, specifically to a die casting apparatus for marine die casting aluminum alloy forgings. Background Technology

[0002] Ship aluminum alloy porthole frames need to adapt to the complex marine environment, with stringent requirements for quality and precision. Die casting is the mainstream forming process, but the traditional process has three major pain points: First, the difficulty in venting exhaust gases leads to porosity defects: air remains in the cavity after mold closing, and exhaust gases are generated when the aluminum alloy cools and shrinks. Due to the lack of an effective suction mechanism, exhaust gas retention causes a large number of pores on the top surface of the finished product, reducing product quality and affecting service life. Second, the lack of a precise identification and stable driving structure for semi-solid aluminum alloy makes it difficult to grasp the optimal shaping time and accurately fill shrinkage gaps, resulting in large dimensional deviations and uneven surfaces of the finished product, making it difficult to meet assembly requirements and requiring secondary processing, increasing costs. Third, leaks are prone to occur at the upper mold joints and suction holes, and the low positioning accuracy of mold closing leads to leakage of molten aluminum alloy, air infiltration, and injection pressure loss, resulting in defects such as material shortages and cold shuts in the finished product, leading to low product quality. Summary of the Invention

[0003] The purpose of this invention is to provide a die-casting apparatus for die-cast aluminum alloy forgings for ships, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a die-casting apparatus for die-cast aluminum alloy forgings for ships, comprising: a die-casting apparatus, a shaping apparatus, and a suction apparatus. The die-casting apparatus is capable of die-casting molten aluminum alloy; the shaping apparatus is disposed in the middle of the die-casting apparatus and extends upward therefrom, and the shaping apparatus can cooperate with the die-casting apparatus to shape the semi-solid aluminum alloy and flatten its top; the suction apparatus is disposed in the center of the right end of the middle of the die-casting apparatus, and the suction apparatus can cooperate with the die-casting apparatus and the shaping apparatus. The suction apparatus can suction the exhaust gas in the cavity of the die-casting apparatus, and the suction apparatus can also cooperate with the shaping apparatus to perform secondary suction of the cavity exhaust gas, thereby improving the quality of the aluminum alloy forgings.

[0005] Preferably, for mold closing, the die-casting device includes: a support platform, a quadruped, a lower mold, locating pins, an L-shaped support plate, a hydraulic push rod, an upper mold, pin holes, an injection mechanism, and a holding furnace. The support platform supports the components connected to the top surface. The quadruped is located at the left end of the top surface of the support platform. The lower mold is located on the top surface of the quadruped, and locating pins are provided at the four corners of the top surface of the lower mold. The L-shaped support plate is located at the left end near the rear side of the outer wall of the support platform. The hydraulic push rod is located at the center of the front end of the top surface of the inner wall of the L-shaped support plate. The upper mold is located at the pushing end of the hydraulic push rod. There are four pin holes, which are respectively located at the four corners of the bottom surface of the upper mold, and the four pin holes match the four locating pins. The injection mechanism is embedded in the left end of the side gate of the upper mold, and the inner cavity of the injection mechanism extends to the inner cavity of the side gate. The holding furnace is located in the top end of the injection mechanism, and the inner cavity of the holding furnace extends to the injection mechanism.

[0006] Preferably, to form the upper mold, the upper mold includes: a mold plate, a mold connecting plate, a mold frame, a side gate, and a suction hole. The mold plate is disposed at the pushing end of the hydraulic push rod. There are two mold connecting plates, which are symmetrically arranged at the center of the front and rear sides of the outer wall of the mold plate. The mold frame is sleeved around one side of the outer wall of the two mold connecting plates. A side gate that runs through the left and right sides is opened at the center of the left side of the outer wall of the mold frame, and a suction hole that runs through the left and right sides is opened at the center of the right side of the outer wall of the mold frame.

[0007] Preferably, in order to form a complete sealed upper mold, the molding device includes: a first driving assembly, a pressure frame, and a high-temperature resistant infrared temperature sensor. The first driving assembly consists of two sets, which are symmetrically arranged at the center of the left and right ends of the top surface of the mold plate. The pressure frame is disposed at the moving ends of the two sets of the first driving assemblies and is embedded between the mold plate and the mold frame. The high-temperature resistant infrared temperature sensor is embedded in the center of the right end of the bottom surface of the pressure frame.

[0008] Preferably, the first driving component can drive the pressure frame to move up and down within a limited distance between the mold plate and the mold frame.

[0009] Preferably, for die-casting the semi-solid aluminum alloy porthole, the first drive assembly includes: a support block, a first gear, a first brake motor, and a first rack. The support block is located at the center of one end of the top surface of the mold plate; the first gear is located at the center of the front side of the outer wall of the support block via a first bearing; the first brake motor is located at the center of the rear side of the outer wall of the support block, and the rotating end of the first brake motor is connected and fixed to the center of the rear end of the first gear, and the first brake motor can drive the first gear to rotate. The first brake motor is electrically connected to a high-temperature resistant infrared temperature sensor; the first rack is located at one end of the top surface of the pressure frame, and one end of the first rack meshes with the first gear. The first brake motor can drive the first gear to rotate and drive the first rack to move the pressure frame up and down to its limit.

[0010] Preferably, for sealing the cavity, the suction device includes: an electric push rod, a support plate, a recognition sensor, an air suction pump, a high-temperature resistant telescopic suction tube, an arc-shaped block, a sealing block, and a second driving device. The electric push rod is located at the center of the right end of the top surface of the support platform; the support plate is located at the pushing end of the electric push rod; the recognition sensor is located at the center of the left end of the top surface of the support plate, and the recognition sensor is electrically connected to the electric push rod; the air suction pump is located at the center of the right end of the top surface of the support plate; and the high-temperature resistant telescopic suction tube is located at the suction end of the air suction pump and is resistant to high temperatures. The left end of the telescopic straw is embedded in the right end of the suction hole; there are two arc-shaped blocks, which are symmetrically arranged at the upper and lower ends of the left side of the high-temperature resistant telescopic straw; a sealing block is set on the left end of the outer wall of the two arc-shaped blocks, the sealing block is embedded in the left end of the suction hole, and the sealing block can move left and right within the suction hole; the second driving device is set at the left corner of the rear end of the top surface of the support plate, and the moving end of the second driving device is embedded in the high-temperature resistant telescopic straw and connected and fixed to one end of the sealing block. The second driving device can drive the sealing block to move left and right within the suction hole.

[0011] Preferably, in order to extract air and oxygen from the cavity, the second driving device includes: a second gear, a second brake motor, a second rack, a limiting block, an L-shaped rod, and a moving rod. The second gear is disposed at the center of the left end near the top surface of the support plate via a second bearing; the second brake motor is disposed at the center of the left end near the bottom surface of the support plate, and the rotating end of the second brake motor is connected and fixed to the second gear, enabling the second brake motor to drive the second gear to rotate; the second rack is disposed at the left corner of the rear end of the top surface of the support plate, and the second rack meshes with the second brake motor; the limiting block is sleeved on the outer wall of the left end near the second rack, and the second brake motor can move left and right within the limiting block; the L-shaped rod is disposed on the top surface of the left end of the second rack, and the top end of the L-shaped rod extends through the outer wall of the center of the high-temperature resistant telescopic suction tube into the high-temperature resistant telescopic suction tube; the moving rod is disposed at the top end of the L-shaped rod, the moving rod is located inside the center of the high-temperature resistant telescopic suction tube, and the left end of the moving rod is connected and fixed to the right end of the sealing block.

[0012] Preferably, the second brake motor drives the second gear to rotate, which in turn drives the second rack to limit the L-shaped rod to move left and right, thereby driving the sealing block to move left and right within the suction hole and the cavity of the upper mold through the moving rod.

[0013] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention achieves dual exhaust gas extraction from the die-casting cavity, effectively solving the technical pain point of traditional die-casting processes where exhaust gas cannot be discharged in time, resulting in a large number of pores on the top surface of the finished product. In the early stage of die casting, the air suction pump, in conjunction with the high-temperature resistant telescopic suction pipe, can perform the first air extraction on the upper and lower mold cavities after mold closing, removing initial air impurities. When the high-temperature molten aluminum alloy cools to a semi-solid state, the top of the cavity creates space due to the contraction of the aluminum alloy, accompanied by exhaust gas generation. The second driving device drives the sealing block to re-enter the cavity to extract the exhaust gas. The dual extraction action significantly reduces the number of pores on the top surface of the solidified aluminum alloy porthole frame, significantly improving the quality of the finished product and ensuring the durability of the ship's porthole frame in the complex marine environment. 2. The coordinated design of the forming device and the die-casting device enables precise forming and top flattening of the semi-solid aluminum alloy; the high-temperature resistant infrared temperature sensor can detect the temperature of the aluminum alloy in real time, accurately identify the semi-solid state and provide a signal to the first drive component, ensuring that the die-casting operation is carried out when the aluminum alloy has the best forming softness; at the same time, the first drive component, through the cooperation of the first gear and the first rack, has high transmission accuracy and self-locking capability, and can stably drive the die-casting of the semi-solid aluminum alloy with space left after shrinkage, which greatly improves the dimensional accuracy and surface flatness of the finished solid aluminum alloy porthole frame, meeting the stringent requirements of ship portholes for assembly accuracy; 3. The device features enhanced sealing performance in multiple structural design elements, providing strong assurance for the stability of the die-casting process. In the upper mold, the mold plate, mold connecting plate, mold frame, and pressure frame together form a complete sealed cavity, preventing leakage of molten aluminum alloy or the entry of external air during die-casting. The high-temperature resistant telescopic suction tube of the suction device can seal the suction hole, and the sealing block also seals the suction hole in the non-suction state. This double sealing design effectively maintains a sealed environment in the cavity. In addition, the upper and lower molds are precisely positioned and closed by positioning pins and pin holes, further improving the cavity sealing performance. This ensures that the injection mechanism can press the molten aluminum alloy into the cavity with stable pressure, avoiding pressure loss or casting defects caused by poor sealing, ensuring the stability of the die-casting process, and improving the quality of the finished product. Attached Figure Description Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the die-casting device of the present invention; Figure 3 This is a schematic diagram of the disassembled upper mold structure of the present invention; Figure 4 This is a diagram showing the location of the pin hole in this invention; Figure 5 This is a schematic diagram of the shaping device structure of the present invention; Figure 6 for Figure 5 Enlarged view of point A; Figure 7 This is a schematic diagram of the disassembled structure of the pressure frame and upper mold of the present invention; Figure 8 This is a schematic diagram of the internal structure of the pressure frame in cross-section of the present invention; Figure 9 This is a schematic diagram of the disassembled structure of the support block connecting component of the present invention; Figure 10 This is a schematic diagram of the position and structure of the suction device of the present invention; Figure 11 This is a cross-sectional view of the interior of the upper mold of the present invention; Figure 12 This is a diagram showing the position of the suction device of the present invention; Figure 13 for Figure 12 Enlarged view of point B; Figure 14 This is a schematic diagram of the split structure of the second gear and the second brake motor of the present invention; Figure 15 This is a schematic diagram of the disassembled structure of the connecting components of the arc-shaped block of the present invention; Figure 16 This is a cross-sectional internal structure diagram of the suction device of the present invention.

[0014] In the diagram: 1. Die-casting device; 2. Shaping device; 3. Suction device; 11. Support platform; 12. Four-legged frame; 13. Lower mold; 14. Positioning pin; 15. L-shaped support plate; 16. Hydraulic push rod; 17. Upper mold; 171. Mold plate; 172. Mold connecting plate; 173. Mold frame; 18. Side gate; 19. Suction hole; 110. Pin hole; 111. Injection mechanism; 112. Holding furnace; 21. First drive assembly; 211. Support block; 212. ... 1. Gear; 213. First brake motor; 214. First rack; 22. Pressure frame; 23. High-temperature resistant infrared temperature sensor; 31. Electric push rod; 32. Support plate; 33. Identification sensor; 34. Air suction pump; 35. High-temperature resistant telescopic suction tube; 36. Arc-shaped block; 37. Sealing block; 38. Second drive device; 381. Second gear; 382. Second brake motor; 383. Second rack; 384. Limiting block; 385. L-shaped rod; 386. Moving rod. Detailed Implementation

[0015] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] Please see Figures 1-16 This invention provides a die-casting apparatus for die-cast aluminum alloy forgings for ships, comprising: a die-casting apparatus 1, a shaping apparatus 2, and a suction apparatus 3. The die-casting apparatus 1 is capable of die-casting molten aluminum alloy, and the die-cast product of the apparatus 1 is a ship's porthole frame. The shaping apparatus 2 is located in the middle of the die-casting apparatus 1 and extends upwards. The shaping apparatus 2 can cooperate with the die-casting apparatus 1 to shape and flatten the semi-solid aluminum alloy at the top. The shaping apparatus 2 can perform the die-casting process on the aluminum alloy inside the die-casting apparatus 1 under a sealed condition. The suction device 3 is located in the center of the right end of the middle part of the die-casting device 1. The suction device 3 can cooperate with the die-casting device 1 and the molding device 2. The suction device 3 can suck up the exhaust gas in the cavity of the die-casting device 1. The suction device 3 can also cooperate with the molding device 2 to perform secondary cavity exhaust gas suction, and improve the quality of aluminum alloy forgings. The function of the suction device 3 in sucking up the air and exhaust gas in the cavity of the die-casting device 1 is to reduce the number of pores formed on the top surface of the solidified aluminum alloy due to air and exhaust gas, and improve the precision and quality of the finished solidified aluminum alloy porthole frame.

[0017] As a preferred option, further, such as Figure 2 and Figure 4As shown, the die-casting device 1 includes: a support platform 11, a quadrupole 12, a lower mold 13, a positioning pin 14, an L-shaped support plate 15, a hydraulic push rod 16, an upper mold 17, a pin hole 110, an injection mechanism 111, and a holding furnace 112. The support platform 11 is used to support the components connected to the top surface, and the support platform 11 provides a certain degree of stability for the top connected components. The quadrupole 12 is located at the left end of the top surface of the support platform 11, and the quadrupole 12 raises the height of the top connected components in order to coordinate with the electric push rod. The rod 31 is better fitted, and the electric push rod 31 is provided with a certain amount of operating space; the lower mold 13 is set on the top surface of the quadrupole 12, and positioning pins 14 are set at the four corners of the top surface of the lower mold 13; the L-shaped support plate 15 is set at the left end near the rear side of the outer wall of the support platform 11, the L-shaped support plate 15 is used to provide a support point for the hydraulic push rod 16, and the L-shaped support plate 15 has a certain stability; the hydraulic push rod 16 is set at the front center of the top surface of the inner wall of the L-shaped support plate 15; the upper mold 17 is set The hydraulic push rod 16 is positioned at the pushing end of the hydraulic push rod 16, which can drive the upper mold 17 to move up and down in a limited manner. There are four pin holes 110, which are respectively set at the four corners of the bottom surface of the upper mold 17, and the four pin holes 110 match the four positioning pins 14. The design of the four pin holes 110 and the four positioning pins 14 can make the upper mold 17 and the lower mold 13 more precise during the mold closing process, and make its cavity sealing better. The injection mechanism 111 is embedded in the left end of the side gate 18 of the upper mold 17. The inner cavity of the injection mechanism 111 extends into the inner cavity of the side gate 18. The injection mechanism 111 can press the high-temperature molten aluminum alloy into the cavities of the upper mold 17 and the lower mold 13 at a specific speed and pressure. The heat preservation furnace 112 is located at the top end of the injection mechanism 111, and the inner cavity of the heat preservation furnace 112 extends into the injection mechanism 111. The heat preservation furnace 112 is used to store the high-temperature molten aluminum alloy and has a certain heat preservation effect before the high-temperature molten aluminum alloy enters the cavity.

[0018] As a preferred option, further, such as Figure 2 and Figure 3 As shown, the upper mold 17 includes: a mold plate 171, a mold connecting plate 172, a mold frame 173, a side gate 18, and a suction hole 19. The mold plate 171 is located at the pushing end of the hydraulic push rod 16. There are two mold connecting plates 172, which are symmetrically arranged at the center of the front and rear sides of the outer wall of the mold plate 171. The two mold connecting plates 172 are used to connect and fix the mold plate 171 and the mold frame 173. The mold frame 173 is sleeved around one side of the outer wall of the two mold connecting plates 172. The space between the mold plate 171 and the mold frame 173 is the cavity of the upper mold 17. A side gate 18 that runs through the left and right sides is opened at the center of the left side of the outer wall of the mold frame 173, and a suction hole 19 that runs through the left and right sides is opened at the center of the right side of the outer wall of the mold frame 173.

[0019] As a preferred option, further, such asFigure 5 , Figure 6 , Figure 7 and Figure 8 As shown, the molding device 2 includes: a first driving assembly 21, a pressure frame 22, and a high-temperature resistant infrared temperature sensor 23. There are two sets of first driving assemblies 21, which are symmetrically arranged at the center of the left and right ends of the top surface of the mold plate 171. The pressure frame 22 is located at the moving end of the two sets of first driving assemblies 21. The pressure frame 22 is embedded between the mold plate 171 and the mold frame 173. The first driving assembly 21 can drive the pressure frame 22 to move up and down between the mold plate 171 and the mold frame 173. The pressure frame 22, the mold plate 171, the mold connecting plate 172, and the mold frame 173 constitute a complete and sealed upper mold 17. The high-temperature resistant infrared temperature sensor 23 is embedded in the center of the right end of the bottom surface of the pressure frame 22. The function of the high-temperature resistant infrared temperature sensor 23 is to determine whether the aluminum alloy is semi-solid by detecting the formation temperature of the semi-solid aluminum alloy.

[0020] As a preferred option, further, such as Figure 5 , Figure 6 , Figure 7 and Figure 9 As shown, the first drive assembly 21 includes: a support block 211, a first gear 212, a first brake motor 213, and a first rack 214. The support block 211 is located at the center of one end of the top surface of the mold plate 171. The support block 211 is an important support component of the first drive assembly 21, ensuring that its connecting components can operate smoothly. The first gear 212 is located at the center of the front side of the outer wall of the support block 211 via a first bearing. The first brake motor 213 is located at the center of the rear side of the outer wall of the support block 211. The rotating end of the first brake motor 213 is connected and fixed to the center of the rear end of the first gear 212, and the first brake motor 213 can drive the first gear 212. 2. Rotation: The first brake motor 213 is electrically connected to the high-temperature resistant infrared temperature sensor 23. The first brake motor 213 has a certain self-locking capability, and its self-locking capability enables the first gear 212 to support the pressure frame 22 through the first rack 214, which can ensure the stable operation of the pressure frame 22. The first rack 214 is set at one end of the top surface of the pressure frame 22, and one end of the first rack 214 meshes with the first gear 212. The first brake motor 213 can drive the first gear 212 to rotate and drive the first rack 214 to move the pressure frame 22 up and down to the limit. The first drive assembly 21 uses the transmission of gears and racks to make its aluminum alloy die-casting process more precise.

[0021] As a preferred option, further, such as Figure 10 , Figure 11 , Figure 12 , Figure 13 , Figure 15 and Figure 16As shown, the suction device 3 includes: an electric push rod 31, a support plate 32, a recognition sensor 33, an air suction pump 34, a high-temperature resistant telescopic suction tube 35, an arc-shaped block 36, a sealing block 37, and a second drive device 38. The electric push rod 31 is located at the center of the right end of the top surface of the support platform 11. The electric push rod 31 has a certain self-locking capability and provides a certain stability to its support plate 32. The support plate 32 is located at the pushing end of the electric push rod 31. The recognition sensor 33 is located at the center of the left end of the top surface of the support plate 32. The device 33 is electrically connected to the electric push rod 31. The identification sensor 33 is used to identify the mold frame 173, thereby providing a power source signal to the electric push rod 31, so that its support plate 32 and the mold frame 173 maintain the original positional relationship of the same height. The air suction pump 34 is located at the center of the right end of the top surface of the support plate 32. The high-temperature resistant telescopic suction tube 35 is located at the suction end of the air suction pump 34, and the left end of the high-temperature resistant telescopic suction tube 35 is embedded in the right end of the suction hole 19. The high-temperature resistant telescopic suction tube 35 can extend and retract, and the high-temperature resistant telescopic suction tube 35 can extend and retract. The straw 35 is made of high-temperature resistant material. The outer wall of the high-temperature resistant telescopic straw 35 can seal the suction hole 19, preventing air from entering the cavities of the upper mold 17 and the lower mold 13, thus improving the finished quality of the aluminum alloy ship porthole. Two arc-shaped blocks 36 are symmetrically arranged at the upper and lower ends of the left side of the high-temperature resistant telescopic straw 35, with a certain distance between them. The space between the two arc-shaped blocks 36 serves as an opening for extracting air and exhaust gas. A sealing block 37 is located between the two arc-shaped blocks 36. At the left end of the outer wall, the sealing block 37 is embedded in the left end of the suction hole 19, and the sealing block 37 can move left and right within the suction hole 19. The sealing block 37 has a certain high temperature resistance and is used to seal the suction hole 19. The second driving device 38 is located at the left corner of the rear end of the top surface of the support plate 32, and the moving end of the second driving device 38 is embedded in the high temperature resistant telescopic suction tube 35 and connected and fixed to one end of the sealing block 37. The second driving device 38 can drive the sealing block 37 to move left and right within the suction hole 19.

[0022] As a preferred option, further, such as Figure 12 , Figure 13 , Figure 14 , Figure 15 and Figure 16As shown, the second driving device 38 includes: a second gear 381, a second brake motor 382, ​​a second rack 383, a limiting block 384, an L-shaped rod 385, and a moving rod 386. The second gear 381 is disposed at the center of the left end near the top surface of the support plate 32 via a second bearing; the second brake motor 382 is disposed at the center of the left end near the bottom surface of the support plate 32, and the rotating end of the second brake motor 382 is connected and fixed to the second gear 381. The second brake motor 382 can drive the second gear 381. 81. Rotation: The second brake motor 382 has a certain self-locking capability; the second rack 383 is located at the left corner of the rear end of the top surface of the support plate 32, and the second rack 383 meshes with the second brake motor 382; the limiting block 384 is sleeved on the outer wall of the left end near the second rack 383, and the second brake motor 382 can move left and right within the limiting block 384. The limiting block 384 not only limits the second rack 383, but also has a certain load-bearing function for the second rack 383; L-shaped rod 3 85 is located on the top left end of the second rack 383, and the top end of the L-shaped rod 385 extends through the outer wall of the center of the high-temperature resistant telescopic straw 35 into the high-temperature resistant telescopic straw 35. The through end of the L-shaped rod 385 and the high-temperature resistant telescopic straw 35 are sealed, and the L-shaped rod 385 provides a certain support for the moving rod 386, allowing the moving rod 386 to operate smoothly. The moving rod 386 is located at the top end of the L-shaped rod 385, and is located inside the center of the high-temperature resistant telescopic straw 35. The left end of rod 386 is connected and fixed to the right end of sealing block 37; the second brake motor 382 drives the second gear 381 to rotate and drive the second rack 383 to limit the L-shaped rod 385 to move left and right, thereby driving the sealing block 37 to move left and right within the suction hole 19 and the cavity of the upper mold 17 through the moving rod 386. This second drive device 38 can operate without affecting the extraction of air and exhaust gas, and the second drive device 38 performs sealing operation within the cavities of the upper mold 17 and the lower mold 13.

[0023] Its detailed connection method is a well-known technology in this field. The following mainly introduces the working principle and process, and the specific work is as follows.

[0024] Preparations before die casting, mold closing and initial sealing and evacuation: Based on the support platform 11, the four-legged bracket 12 on the left side of its top surface supports the lower mold 13 to ensure the stability of the mold; the L-shaped support plate 15 on the left side of the rear provides fixed support for the hydraulic push rod 16. The hydraulic push rod 16 drives the upper mold 17 at its pushing end to move downward until the pin holes 110 at the four corners of the bottom surface of the upper mold 17 are precisely engaged with the positioning pins 14 at the four corners of the top surface of the lower mold 13, thus completing the mold closing of the upper and lower molds. After the mold is closed, the mold plate 171 of the upper mold 17, the mold connecting plates 172 symmetrically arranged at the front and rear, the mold frame 173 of the ring connecting plate, and the subsequently embedded pressure frame 22 together form a sealed cavity to prevent molten aluminum alloy leakage or external air infiltration; the side gate 18 on the left side of the mold frame 173 is an aluminum alloy injection channel, and the suction hole 19 on the right side is an exhaust gas suction channel. The electric push rod 31 at the right end of the top surface of the support platform 11 pushes the support plate 32 at its top to move. After the identification sensor 33 at the left end of the top surface of the support plate 32 identifies the position of the mold frame 173, it sends a signal to the electric push rod 31 so that the support plate 32 and the mold frame 173 are highly matched, ensuring that the subsequent air extraction components are aligned. The air suction pump 34 at the right end of the top surface of the support plate 32 is activated. The left end of the high-temperature resistant telescopic suction tube 35 at its suction end is embedded in the right end of the suction hole 19. The arc-shaped blocks 36 at the upper and lower ends of the left side of the high-temperature resistant telescopic suction tube 35 support the sealing block 37, so that the sealing block 37 is embedded in the left end of the suction hole 19. At this time, the second drive device 38 is activated: the second brake motor 382 at the left end of the bottom surface of the support plate 32 drives the second gear 381 at its rotating end to rotate. The second gear 381 meshes with the second rack 383 at the left corner of the rear end of the support plate 32, causing the second rack 383 to move to the left within the limiting block 384. Then, through the L-shaped rod 385 on the top surface of the left end of the second rack 383 and the moving rod 386 that passes through the high-temperature resistant telescopic suction tube 35, the sealing block 37 is pushed into the cavity. In conjunction with the air suction pump 34, the initial residual air in the cavity is extracted. After the initial air extraction is completed, the second brake motor 382 reverses to reset the sealing block 37 into the suction hole 19, sealing the cavity.

[0025] In the die-casting stage, molten aluminum alloy is poured in and cooled: The injection mechanism 111, which is embedded in the left end of the side gate 18, is activated. The heat preservation furnace 112 on top of it delivers high-temperature molten aluminum alloy to the injection mechanism 111 (the heat preservation furnace maintains the molten state of the aluminum alloy to prevent premature solidification). The injection mechanism 111 presses the molten aluminum alloy through the side gate 18 into the closed cavity at the set pressure and speed until the cavity is filled with aluminum alloy. The cooling systems of the upper mold 17 and the lower mold 13 are activated to cool the molten aluminum alloy in the cavity. As the temperature drops, the aluminum alloy gradually changes from liquid to semi-solid. During this process, the aluminum alloy shrinks in volume, creating a small space at the top of the cavity, and waste gas (such as air and aluminum alloy volatile gases) is generated, requiring subsequent secondary evacuation and shaping.

[0026] Precision shaping and secondary air extraction: The pressure frame 22 of the molding device 2 is embedded between the mold plate 171 and the mold frame 173. The high-temperature resistant infrared temperature sensor 23 on the right side of its bottom surface detects the temperature of the aluminum alloy in real time. When the aluminum alloy is detected to reach a semi-solid state (with malleable softness and not completely solidified), it sends a signal to the two sets of first drive components 21. Two sets of first drive components 21 start synchronously. The first brake motor 213 on the rear side of the support block 211 at the left and right ends of the top surface of the mold plate 171 drives the first gear 212 at its rotating end to rotate. The first gear 212 meshes with the first rack 214 on the top surface of the pressure frame 22, causing the pressure frame 22 to move downward between the mold plate 171 and the mold frame 173, filling the top space generated by the shrinkage of the aluminum alloy, realizing the precise shaping and top flattening of the semi-solid aluminum alloy, and ensuring the dimensional accuracy and surface flatness of the finished porthole frame. Secondary air extraction: Waste gas generated during the shrinkage of semi-solid aluminum alloy can cause air holes in the finished product if it remains in the mold cavity. At this time, the suction device 3 is restarted: the second brake motor 382 of the second drive device 38 drives the second gear 381 and the second rack 383 to move again. Through the L-shaped rod 385 and the moving rod 386, the sealing block 37 is pushed back into the mold cavity. The air suction pump 34 simultaneously extracts the shrinkage waste gas in the mold cavity. After the secondary air extraction is completed, the sealing block 37 is reset, and the waste gas in the mold cavity is completely removed to avoid air holes on the top surface of the finished product.

[0027] Finished product forming: After the secondary degassing and shaping are completed, the cooling systems of the upper mold 17 and the lower mold 13 continue to work until the semi-solid aluminum alloy is completely solidified into a solid porthole frame; then the hydraulic push rod 16 drives the upper mold 17 to move upward, the first drive component 21 drives the pressure frame 22 to reset upward, open the cavity, and take out the formed ship aluminum alloy porthole frame to complete one die casting cycle.

[0028] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A die-casting apparatus for die-cast aluminum alloy forgings for marine applications, characterized in that, include: The die-casting device (1) is capable of die-casting molten aluminum alloy; A shaping device (2) is provided in the middle of the die-casting device (1) and extends upward. The shaping device (2) can cooperate with the die-casting device (1) to shape and flatten the semi-solid aluminum alloy at the top. The suction device (3) is located in the center of the right end of the middle part of the die casting device (1), and the suction device (3) can cooperate with the die casting device (1) and the molding device (2). The suction device (3) can suck the exhaust gas in the cavity of the die casting device (1). The suction device (3) can also cooperate with the molding device (2) to perform secondary cavity exhaust gas suction and improve the quality of aluminum alloy forgings.

2. The die-casting apparatus for die-cast aluminum alloy forgings for ships according to claim 1, characterized in that, The die-casting apparatus (1) includes: Support platform (11) for supporting components connected to the top surface; A quadrupole (12) is mounted on the top left end of the support platform (11); The lower mold (13) is set on the top surface of the four-legged frame (12), and the four corners of the top surface of the lower mold (13) are provided with positioning pins (14). An L-shaped support plate (15) is disposed at the left end near the rear side of the outer wall of the support platform (11); A hydraulic push rod (16) is located at the front end center of the top surface of the inner wall of the L-shaped support plate (15); The upper mold (17) is located at the pushing end of the hydraulic push rod (16); There are four pin holes (110), which are respectively set at the four corners of the bottom surface of the upper mold (17), and the four pin holes (110) are matched with four positioning pins (14); The injection mechanism (111) is embedded in the left end of the side gate (18) of the upper mold (17), and the inner cavity of the injection mechanism (111) extends through the inner cavity of the side gate (18). A heat preservation furnace (112) is disposed at one end of the top of the injection mechanism (111), and the inner cavity of the heat preservation furnace (112) extends into the injection mechanism (111).

3. The die-casting apparatus for die-cast aluminum alloy forgings for ships according to claim 2, characterized in that, The upper mold (17) includes: A mold plate (171) is disposed at the pushing end of the hydraulic push rod (16); There are two mold connecting plates (172), which are symmetrically arranged at the center of the front and rear sides of the outer wall of the mold plate (171); The mold frame (173) is fitted around one side of the outer wall of the two mold connecting plates (172). A side gate (18) that runs through the left and right sides is opened at the center of the left side of the outer wall of the mold frame (173), and a suction hole (19) that runs through the left and right sides is opened at the center of the right side of the outer wall of the mold frame (173).

4. The die-casting apparatus for die-cast aluminum alloy forgings for ships according to claim 3, characterized in that, The shaping device (2) includes: The first drive assembly (21) consists of two sets, which are symmetrically arranged at the center of the left and right ends of the top surface of the mold plate (171); A pressure frame (22) is disposed at the moving end of the two sets of the first drive components (21), and the pressure frame (22) is embedded between the mold plate (171) and the mold frame (173); A high-temperature resistant infrared temperature sensor (23) is embedded in the center of the right end of the bottom surface of the pressure frame (22).

5. The die-casting apparatus for die-cast aluminum alloy forgings for ships according to claim 4, characterized in that, The first driving component (21) can drive the pressure frame (22) to move up and down between the mold plate (171) and the mold frame (173) in a limited manner.

6. The die-casting apparatus for die-cast aluminum alloy forgings for ships according to claim 5, characterized in that, The first driving component (21) includes: A support block (211) is disposed at the center of one end of the top surface of the mold plate (171); The first gear (212) is disposed at the center of the front side of the outer wall of the support block (211) via the first bearing; The first brake motor (213) is located at the center of the rear side of the outer wall of the support block (211). The rotating end of the first brake motor (213) is connected and fixed to the center of the rear end of the first gear (212). The first brake motor (213) can drive the first gear (212) to rotate. The first brake motor (213) is electrically connected to the high-temperature resistant infrared temperature sensor (23). The first rack (214) is disposed at one end of the top surface of the pressure frame (22). One end of the first rack (214) meshes with the first gear (212). The first brake motor (213) can drive the first gear (212) to rotate and drive the first rack (214) to move the pressure frame (22) up and down.

7. The die-casting apparatus for die-cast aluminum alloy forgings for ships according to claim 6, characterized in that, The suction device (3) includes: An electric push rod (31) is located at the center of the right end of the top surface of the support platform (11); A support plate (32) is disposed at the pushing end of the electric push rod (31); The identification sensor (33) is located at the center of the left end of the top surface of the support plate (32), and the identification sensor (33) is electrically connected to the electric push rod (31); An air intake pump (34) is located at the center of the right end of the top surface of the support plate (32); A high-temperature resistant telescopic suction tube (35) is provided at the suction end of the air suction pump (34), and the left end of the high-temperature resistant telescopic suction tube (35) is embedded in the right end of the suction hole (19). Two arc-shaped blocks (36) are symmetrically arranged at the upper and lower ends of the left side of the high-temperature resistant telescopic straw (35); A sealing block (37) is disposed on the left end of the outer wall of the two arc-shaped blocks (36). The sealing block (37) is embedded in the left end of the suction hole (19), and the sealing block (37) can move left and right within the suction hole (19). The second driving device (38) is located at the left corner of the rear end of the top surface of the support plate (32), and the moving end of the second driving device (38) is embedded in the high temperature resistant telescopic suction tube (35) and connected and fixed to one end of the sealing block (37). The second driving device (38) can drive the sealing block (37) to move left and right within the suction hole (19).

8. The die-casting apparatus for die-cast aluminum alloy forgings for ships according to claim 7, characterized in that, The second drive unit (38) includes: The second gear (381) is disposed at the center of the left end near the top surface of the support plate (32) via the second bearing; The second brake motor (382) is located at the center of the left end near the bottom surface of the support plate (32), and the rotating end of the second brake motor (382) is connected and fixed to the second gear (381). The second brake motor (382) can drive the second gear (381) to rotate. The second rack (383) is located at the left corner of the rear end of the top surface of the support plate (32), and the second rack (383) meshes with the second brake motor (382); The limiting block (384) is sleeved on the outer wall of the left end near the second rack (383), and the second brake motor (382) can move left and right within the limiting block (384); L-shaped rod (385) is set on the top left end of the second rack (383), and the top end of L-shaped rod (385) extends through the outer wall of the center of the high temperature resistant telescopic straw (35) into the high temperature resistant telescopic straw (35). A movable rod (386) is located at the top of the L-shaped rod (385). The movable rod (386) is located in the center of the high-temperature resistant telescopic straw (35), and the left end of the movable rod (386) is connected and fixed to the right end of the sealing block (37).

9. A die-casting apparatus for die-cast aluminum alloy forgings for ships according to claim 8, characterized in that, The second brake motor (382) drives the second gear (381) to rotate and drive the second rack (383) to limit the L-shaped rod (385) to move left and right, thereby driving the sealing block (37) to move left and right within the suction hole (19) and the cavity of the upper mold (17) through the moving rod (386).

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