Die casting device for die casting aluminum alloy forging for ship

Abstract

The present application relates to the technical field of ship aluminum alloy forging die casting, and specifically discloses a die casting device for ship aluminum alloy forging, which comprises a die casting device, a shaping device and a suction device. The die casting device can be used for die casting molten aluminum alloy. The shaping device is arranged in the middle part of the die casting device and extends upward by a part. The shaping device can cooperate with the die casting device to shape and flatten the top of the semi-solid aluminum alloy. The suction device is arranged in the middle right end center of the die casting device. The suction device can suck the exhaust gas in the cavity of the die casting device. The suction device can also cooperate with the shaping device to suck the exhaust gas in the secondary cavity, and improve the quality of the aluminum alloy forging. The double exhaust gas suction solves the problem of air holes in the finished product, the precise shaping is realized through collaborative design, the stable die casting is ensured through the multi-structure reinforced sealing, and the quality, size precision and durability of the ship aluminum alloy porthole frame finished product are significantly improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of die casting of ship aluminum alloy forgings, in particular to a die casting device for die casting of ship aluminum alloy forgings. BACKGROUND

[0002] The ship aluminum alloy porthole frame needs to adapt to the complex marine environment, and the quality and precision requirements are strict. Die casting is the mainstream forming process, but the traditional process has three core pain points. It is difficult to exhaust air to form pores: after the mold is closed, air is left in the cavity, and aluminum alloy cooling shrinkage generates waste gas. Because there is no effective suction mechanism, the waste gas retention causes a large number of pores on the top surface of the finished product, reduces the quality of the finished product and affects the service life. There is a lack of accurate identification and stable driving structure of aluminum alloy semi-solid state, it is difficult to grasp the best shaping opportunity, and it is difficult to accurately fill the shrinkage gap. The finished product size deviation is large, the surface is uneven, and it is difficult to meet the assembly requirements, and secondary processing is required to increase the cost. The upper mold joint, suction hole is easy to leak, the mold positioning accuracy is low, which leads to leakage of molten aluminum alloy, air infiltration, pressure loss, and the finished product is prone to defects such as material shortage and cold separation. The quality of the finished product is low. SUMMARY

[0003] The purpose of the present application is to provide a die casting device for die casting of ship aluminum alloy forgings to solve the problems raised in the background art.

[0004] To achieve the above purpose, the present application provides the following technical scheme: a die casting device for die casting of ship aluminum alloy forgings, comprising: a die casting device, a shaping device and a suction device, the die casting device can die cast molten aluminum alloy; the shaping device is arranged in the middle part of the die casting device and extends upward by a part, and the shaping device can cooperate with the die casting device to shape 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 part of the die casting device, and the suction device can cooperate with the die casting device and the shaping device. The suction device can suck the waste gas in the cavity of the die casting device, and the suction device can also cooperate with the shaping device to perform secondary cavity waste gas suction, and improve the quality of the aluminum alloy forging.

[0005] Preferably, in order to perform mold closing, the die casting device comprises a support platform, a four-legged support, a lower mold, a positioning pin, an L-shaped support plate, a hydraulic push rod, an upper mold, a pin hole, a injection mechanism and a holding furnace, the support platform is used for supporting the top surface connected parts; the four-legged support is arranged at the top surface left end of the support platform; the lower mold is arranged at the top surface of the four-legged support, and the top surface four corners of the lower mold are provided with positioning pins; the L-shaped support plate is arranged at the left end close to the rear side of the outer wall of the support platform; the hydraulic push rod is arranged at the front end center of the inner wall top surface of the L-shaped support plate; the upper mold is arranged at the pushing end of the hydraulic push rod; the pin hole is four in number and is arranged at the bottom surface four corners of the upper mold respectively, and the four pin holes are matched with the four positioning 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 is communicated with the inner cavity of the side gate; the holding furnace is arranged in one end of the top of the injection mechanism, and the inner cavity of the holding furnace is communicated with the inner cavity of the injection mechanism.

[0006] Preferably, in order to constitute the upper mold, the upper mold comprises a mold plate, a mold connecting plate, a mold frame, a side gate and a suction hole, the mold plate is arranged at the pushing end of the hydraulic push rod; the mold connecting plate is two in number and is arranged symmetrically at the front and rear center of the outer wall of the mold plate; the mold frame is sleeved on one side of the outer wall of the two mold connecting plates, the left center of the outer wall of the mold frame is provided with a left and right through side gate, and the right center of the outer wall of the mold frame is provided with a left and right through suction hole.

[0007] Preferably, in order to constitute a complete sealing but upper mold, the shaping device comprises a first driving assembly, a pressing frame and a high-temperature-resistant infrared temperature sensor, the first driving assembly is two groups in number and is arranged symmetrically at the left and right end centers of the top surface of the mold plate; the pressing frame is arranged at the moving end of the two groups of first driving assemblies, and the pressing frame is embedded between the mold plate and the mold frame; the high-temperature-resistant infrared temperature sensor is embedded in the right end center of the bottom surface of the pressing frame.

[0008] Preferably, the first driving assembly can drive the pressing frame to move up and down between the mold plate and the mold frame.

[0009] Preferably, in order to carry out the die casting process on the semi-solid aluminum alloy porthole, the first driving assembly comprises a support block, a first gear, a first brake motor and a first rack, the support block is arranged at the center of one end of the top surface of the mold plate; the first gear is arranged at the center of the front side of the outer wall of the support block through a first bearing; the first brake motor is arranged at the center of the rear side of the outer wall of the support block, the rotating end of the first brake motor is fixedly connected with the rear end center of the first gear, and the first brake motor can drive the first gear to rotate, the first brake motor is electrically connected with the high-temperature-resistant infrared temperature sensor; the first rack is arranged at one end of the top surface of the pressing frame, one end of the first rack is engaged with the first gear, and the first brake motor can drive the first gear to rotate to drive the first rack to move up and down.

[0010] Preferably, in order to seal the cavity, the suction device comprises an electric push rod, a support plate, an identification sensor, an air suction pump, a high-temperature-resistant telescopic suction pipe, an arc block, a sealing block and a second driving device, the electric push rod is arranged at the center of the right end of the top surface of the support platform; the support plate is arranged at the pushing end of the electric push rod; the identification sensor is arranged at the center of the left end of the top surface of the support plate, and the identification sensor is electrically connected with the electric push rod; the air suction pump is arranged at the center of the right end of the top surface of the support plate; the high-temperature-resistant telescopic suction pipe is arranged at the suction end of the air suction pump, and the left end of the high-temperature-resistant telescopic suction pipe is embedded in the right end of the suction hole; the arc blocks are two in number and are symmetrically arranged at the upper and lower ends of the left side of the high-temperature-resistant telescopic suction pipe; the sealing block is arranged at the left end of the outer wall of the two arc blocks, the sealing block is embedded in the left end of the suction hole, and the sealing block can move left and right in the suction hole; the second driving device is arranged at the rear left corner 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 suction pipe and fixedly connected with one end of the sealing block, and the second driving device can drive the sealing block to move left and right in the suction hole.

[0011] Preferably, in order to extract air and oxygen in the cavity, the second driving device comprises a second gear, a second brake motor, a second rack, a limit block, an L-shaped rod and a moving rod, the second gear is arranged on the left end center of the top surface of the support plate through a second bearing; the second brake motor is arranged on the left end center of the bottom surface of the support plate, and the rotating end of the second brake motor is fixedly connected with the second gear, and the second brake motor can drive the second gear to rotate; the second rack is arranged on the top surface of the rear end left corner of the support plate, and the second rack is meshed with the second brake motor; the limit block is sleeved on the left end outer wall close to the second rack, and the second brake motor can be limited to move left and right in the limit block; the L-shaped rod is arranged on the top surface of the left end of the second rack, and the top end of the L-shaped rod extends through the center outer wall of the high-temperature-resistant telescopic suction pipe and into the high-temperature-resistant telescopic suction pipe; the moving rod is arranged on the top end of the L-shaped rod, and the moving rod is located in the center of the high-temperature-resistant telescopic suction pipe, and the left end of the moving rod is fixedly connected with the right end of the sealing block.

[0012] Preferably, the second brake motor drives the second gear to rotate, drives the second rack to move left and right, and drives the sealing block to move left and right in the suction hole and the cavity of the upper mold through the moving rod.

[0013] Compared with the prior art, the present application has the following advantages:

[0014] 1. The present application realizes double exhaust gas suction of the die casting cavity, effectively solves the technical pain point that a large number of pores are generated on the top surface of the product due to the failure of exhaust gas to be discharged in time in the traditional die casting process; in the initial stage of die casting, the air suction pump cooperates with the high-temperature-resistant telescopic suction pipe to perform the first air extraction on the cavities of the upper mold and the lower mold after the molds are closed, and the initial air impurities are removed; when the high-temperature molten aluminum alloy cools to a semi-solid state, the space at the top of the cavity is generated due to the shrinkage of the aluminum alloy, and waste gas is generated, the second driving device drives the sealing block to enter the cavity again to extract the waste gas, and the double suction action greatly reduces the number of pores on the top surface of the aluminum alloy porthole frame after solidification, significantly improves the product quality, and guarantees the durability of the ship porthole frame in the complex marine environment;

[0015] 2. The synergistic design of the shaping device and the die casting device realizes precise shaping and top flattening of the semi-solid aluminum alloy; the high-temperature infrared temperature sensor can detect the temperature of the aluminum alloy in real time, accurately identify the semi-solid state and provide signals for the first driving assembly, and ensure that the die casting operation is performed when the aluminum alloy has the best shaping softness; at the same time, the first driving assembly cooperates with the first gear and the first rack, has high transmission precision and self-locking ability, can stably drive the pressure frame to perform secondary die casting shaping on the semi-solid aluminum alloy with space left after shrinkage, greatly improves the dimensional accuracy and surface flatness of the finished solid aluminum alloy porthole frame, and meets the strict requirements of the ship porthole on assembly accuracy;

[0016] 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

[0017] Figure 1 This is a schematic diagram of the structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the die-casting device of the present invention;

[0019] Figure 3 This is a schematic diagram of the disassembled upper mold structure of the present invention;

[0020] Figure 4 This is a diagram showing the location of the pin hole in this invention;

[0021] Figure 5 This is a schematic diagram of the shaping device structure of the present invention;

[0022] Figure 6 for Figure 5 Enlarged view of point A;

[0023] Figure 7 This is a schematic diagram of the disassembled structure of the pressure frame and upper mold of the present invention;

[0024] Figure 8 This is a schematic diagram of the internal structure of the pressure frame in cross-section of the present invention;

[0025] Figure 9 This is a schematic diagram of the disassembled structure of the support block connecting component of the present invention;

[0026] Figure 10 This is a schematic diagram of the position and structure of the suction device of the present invention;

[0027] Figure 11 This is a cross-sectional view of the interior of the upper mold of the present invention;

[0028] Figure 12 This is a diagram showing the position of the suction device of the present invention;

[0029] Figure 13 for Figure 12 Enlarged view of point B;

[0030] Figure 14 Split structure schematic diagram of second gear and second brake motor of the application;

[0031] Figure 15 Split structure schematic diagram of connecting component of the arc-shaped block of the application;

[0032] Figure 16 Sectional internal structure schematic diagram of the suction device of the application.

[0033] In the figure: 1, die casting device; 2, shaping device; 3, suction device; 11, support platform; 12, four-legged support; 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 driving assembly; 211, support block; 212, first gear; 213, first brake motor; 214, first rack; 22, pressing 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 pipe; 36, arc-shaped block; 37, sealing block; 38, second driving device; 381, second gear; 382, second brake motor; 383, second rack; 384, limiting block; 385, L-shaped rod; 386, moving rod. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the application.

[0035] Please refer to Figures 1-16The application provides a die casting device for ship die casting aluminum alloy forgings, which has the technical scheme that: the die casting device 1, the shaping device 2 and the suction device 3, the die casting device 1 can die cast molten aluminum alloy, the die casting product of the die casting device 1 is a ship side window frame; the shaping device 2 is arranged in the middle part of the die casting device 1 and extends upward by a part, the shaping device 2 can cooperate with the die casting device 1 to shape and flatten the top of the semi-solid aluminum alloy, the shaping device 2 can die cast the aluminum alloy in the die casting device 1 in a sealed state; the suction device 3 is arranged in the middle right end center of the die casting device 1, the suction device 3 can cooperate with the die casting device 1 and the shaping device 2, the suction device 3 can suck the waste gas in the die cavity of the die casting device 1, the suction device 3 can also cooperate with the shaping device 2 to suck the waste gas in the secondary die cavity, the quality of the aluminum alloy forgings is improved, the air and the waste gas in the die cavity of the die casting device 1 are sucked by the suction device 3, the number of air holes formed on the top surface of the solid aluminum alloy due to the air and the waste gas is reduced, and the precision and the quality of the finished product solid aluminum alloy side window frame are improved.

[0036] As a preferred solution, further, as Figure 2 and Figure 4As shown, the die casting device 1 comprises a support platform 11, a four-legged support 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, a injection mechanism 111 and a holding furnace 112. The support platform 11 is used to support the top connecting component, and the support platform 11 has a certain stability for the top connecting component. The four-legged support 12 is arranged at the top left end of the support platform 11. The four-legged support 12 improves the height of the top connecting component, so as to better cooperate with the electric push rod 31 and provide a certain operation space for the electric push rod 31. The lower mold 13 is arranged at the top of the four-legged support 12. The top of the lower mold 13 is provided with a positioning pin 14 at each corner. The L-shaped support plate 15 is arranged at the left end close to 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 arranged at the front end center of the inner wall top surface of the L-shaped support plate 15. The upper mold 17 is arranged at the driving end of the hydraulic push rod 16. The hydraulic push rod 16 can drive the upper mold 17 to move up and down. The pin hole 110 is four in number and is arranged at the bottom surface of the upper mold 17 at each corner. The four pin holes 110 are matched with 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 accurate during the mold closing process, so that the cavity sealing performance is 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 penetrates into the inner cavity of the side gate 18. The injection mechanism 111 can press the high-temperature molten aluminum alloy into the cavity of the upper mold 17 and the lower mold 13 at a certain speed and pressure. The holding furnace 112 is arranged in the top end of the injection mechanism 111. The inner cavity of the holding furnace 112 penetrates into the injection mechanism 111. The holding furnace 112 is used to store high-temperature molten aluminum alloy and has a certain heat preservation effect before the high-temperature molten aluminum alloy enters the cavity.

[0037] As a preferred solution, further, as shown in Figure 2 and Figure 3 The upper mold 17 comprises 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 arranged at the driving end of the hydraulic push rod 16. The mold connecting plate 172 is two in number and is arranged symmetrically at the front and rear center of the outer wall of the mold plate 171. The two mold connecting plates 172 are used for the connection and fixation of the mold plate 171 and the mold frame 173. The mold frame 173 is sleeved on 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. The left center of the outer wall of the mold frame 173 is provided with a left-right penetrating side gate 18. The right center of the outer wall of the mold frame 173 is provided with a left-right penetrating suction hole 19.

[0038] As a preferred solution, further, as shown inFigure 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.

[0039] 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.

[0040] 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 comprises: an electric push rod 31, a support plate 32, an identification sensor 33, an air suction pump 34, a high-temperature-resistant telescopic suction pipe 35, an arc block 36, a sealing block 37, and a second driving device 38. The electric push rod 31 is arranged at the center of the right end of the top surface of the support platform 11, and has a certain self-locking capability, and the support plate 32 has a certain stability. The support plate 32 is arranged at the pushing end of the electric push rod 31. The identification sensor 33 is arranged at the center of the left end of the top surface of the support plate 32, and is electrically connected with the electric push rod 31. The identification sensor 33 is used for identifying the mold frame 173, thereby providing a power source signal for the electric push rod 31, so that the support plate 32 maintains the same height position relationship with the mold frame 173. The air suction pump 34 is arranged at the center of the right end of the top surface of the support plate 32. The high-temperature-resistant telescopic suction pipe 35 is arranged at the suction end of the air suction pump 34, and the left end of the high-temperature-resistant telescopic suction pipe 35 is embedded in the right end of the suction hole 19. The high-temperature-resistant telescopic suction pipe 35 can be telescopic, and the material of the high-temperature-resistant telescopic suction pipe 35 has high-temperature resistance. The outer wall of the high-temperature-resistant telescopic suction pipe 35 can seal the suction hole 19, prevent air from entering the cavity of the upper mold 17 and the lower mold 13, and improve the finished product quality of the finished aluminum alloy ship cabin window. The arc block 36 is symmetrical and arranged at the upper and lower ends of the left side of the high-temperature-resistant telescopic suction pipe 35. There is a certain distance between the two arc blocks 36, and the space between the two arc blocks 36 is an opening for extracting air and waste gas. The sealing block 37 is arranged at the left end of the outer wall of the two arc blocks 36, and is embedded in the left end of the suction hole 19. The sealing block 37 can be limited to move left and right in the suction hole 19. The sealing block 37 has a certain high-temperature resistance, and is used for sealing the suction hole 19. The second driving device 38 is arranged at the top surface of the rear left corner of the support plate 32, and the moving end of the second driving device 38 is embedded in the high-temperature-resistant telescopic suction pipe 35 and connected and fixed with one end of the sealing block 37. The second driving device 38 can drive the sealing block 37 to move left and right in the suction hole 19.

[0041] As a preferred solution, further, as Figure 12 、 Figure 13 、 Figure 14 、 Figure 15 and Figure 16As shown, the second driving device 38 comprises: 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 arranged at the left end center of the top surface of the support plate 32 through a second bearing. The second brake motor 382 is arranged at the left end center of the bottom surface of the support plate 32, and the rotating end of the second brake motor 382 is fixedly connected with the second gear 381. The second brake motor 382 can drive the second gear 381 to rotate, and the second brake motor 382 has a certain self-locking capability. The second rack 383 is arranged at the left corner of the rear end of the top surface of the support plate 32, and the second rack 383 is in mesh with the second brake motor 382. The limiting block 384 is sleeved on the left end outer wall close to the second rack 383, and the second brake motor 382 can be limited to move left and right in the limiting block 384. The limiting block 384 not only has a limiting effect on the second rack 383, but also has a certain bearing effect on the second rack 383. The L-shaped rod 385 is arranged on the top surface of the left end of the second rack 383, and the top end of the L-shaped rod 385 extends into the high-temperature-resistant telescopic suction pipe 35 through the center outer wall of the high-temperature-resistant telescopic suction pipe 35. The L-shaped rod 385 and the penetrating end of the high-temperature-resistant telescopic suction pipe 35 are in a sealed state, and the L-shaped rod 385 has a certain supporting effect on the moving rod 386, so that the moving rod 386 operates stably. The moving rod 386 is arranged at the top end of the L-shaped rod 385, and the moving rod 386 is located in the center of the high-temperature-resistant telescopic suction pipe 35. The left end of the moving rod 386 is fixedly connected with the right end of the sealing block 37. The second brake motor 382 drives the second gear 381 to rotate, drives the second rack 383, and makes the L-shaped rod 385 limited to move left and right, so as to drive the sealing block 37 to move left and right in the suction hole 19 and the cavity of the upper mold 17 through the moving rod 386. The second driving device 38 can operate without affecting the extraction of air and exhaust gas, and the second driving device 38 can seal and operate in the cavity of the upper mold 17 and the lower mold 13.

[0042] The detailed connection means is a known technology in the art. The working principle and process are mainly introduced below.

[0043] Preparation before die casting, mold closing and initial sealing and air extraction:

[0044] Based on the support platform 11, the four-legged support 12 at the left end of the top surface supports the lower mold 13 to ensure the stability of the mold. The L-shaped support plate 15 at the left end of the rear side provides fixed support for the hydraulic push rod 16. The hydraulic push rod 16 drives the upper mold 17 at the 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 fitted with the positioning pins 14 at the four corners of the top surface of the lower mold 13, and the mold closing is completed.

[0045] After the mold is closed, the mold plate 171 of the upper mold 17, the mold connecting plate 172 symmetrical in front and back, the mold frame 173 of the ring sleeve connecting plate, and the subsequent embedded pressure frame 22 jointly constitute a closed cavity to avoid leakage of molten aluminum alloy or infiltration of external air; 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 a waste gas suction channel;

[0046] The electric push rod 31 at the right end of the top surface of the support platform 11 pushes the support plate 32 at the top end to move, and 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 and then feeds back a signal to the electric push rod 31, so that the support plate 32 and the mold frame 173 are height-matched to ensure the alignment of the subsequent air extraction assembly.

[0047] The air suction pump 34 at the right end of the top surface of the support plate 32 is started, the high-temperature-resistant telescopic suction pipe 35 at the left end of the suction end is embedded into the right end of the suction hole 19, and the arc blocks 36 at the left side of the top and bottom ends of the high-temperature-resistant telescopic suction pipe 35 support the sealing blocks 37, so that the sealing blocks 37 are embedded into the left end of the suction hole 19; at this time, the second driving device 38 is started: the second brake motor 382 at the left end of the bottom surface of the support plate 32 drives the second gear 381 at the rotating end to rotate, the second gear 381 is engaged with the second rack 383 at the left corner of the rear end of the support plate 32, the second rack 383 is driven to move leftward in the limiting block 384, and then the L-shaped rod 385 at the top surface of the left end of the second rack 383 and the moving rod 386 penetrating through the high-temperature-resistant telescopic suction pipe 35 push the sealing blocks 37 into the cavity, and the air suction pump 34 extracts the initial residual air in the cavity, and after the initial air extraction is completed, the second brake motor 382 is reversed to reset the sealing blocks 37 into the suction hole 19 to close the cavity.

[0048] In the die casting stage, the molten aluminum alloy is injected and cooled:

[0049] The injection mechanism 111 embedded in the left end of the side gate 18 is started, the heat preservation furnace 112 at the top of the injection mechanism 111 delivers high-temperature molten aluminum alloy to the injection mechanism 111 (the heat preservation furnace maintains the molten state of the aluminum alloy to avoid premature solidification), and the injection mechanism 111 pressurizes and injects the molten aluminum alloy into the closed cavity through the side gate 18 at a set pressure and speed until the cavity is filled with aluminum alloy;

[0050] The cooling system of the upper mold 17 and the lower mold 13 is started to cool the molten aluminum alloy in the cavity; as the temperature decreases, the aluminum alloy gradually changes from a liquid state to a semi-solid state, and the volume of the aluminum alloy shrinks in this process, a small space is generated at the top of the cavity, and waste gas (such as air and aluminum alloy volatile gas) is generated, which needs to be extracted and shaped in the subsequent secondary air extraction.

[0051] Precise shaping and secondary air extraction:

[0052] The compression frame 22 of the shaping device 2 is embedded between the mold plate 171 and the mold frame 173, and the high-temperature-resistant infrared temperature sensor 23 at the bottom right end of the compression frame 22 detects the temperature of the aluminum alloy in real time. When the aluminum alloy reaches a semi-solid state (has a plastic softness and is not completely solidified), a signal is sent to the two sets of first driving assemblies 21;

[0053] The two sets of first driving assemblies 21 are started synchronously, the first brake motor 213 at the rear side of the support block 211 at the top left and right ends of the mold plate 171 drives the first gear 212 at the rotating end to rotate, the first gear 212 is engaged with the first rack 214 at the top of the compression frame 22, and the compression frame 22 is moved downward between the mold plate 171 and the mold frame 173 to fill the top space caused by the shrinkage of the aluminum alloy, thereby achieving precise shaping and top flattening of the semi-solid aluminum alloy, and ensuring the size accuracy and surface flatness of the finished product.

[0054] Secondary air extraction: The waste gas generated during the shrinkage of the semi-solid aluminum alloy will cause pores in the finished product. At this time, the suction device 3 is started again: the second brake motor 382 of the second driving device 38 drives the second gear 381 and the second rack 383 to move again, the sealing block 37 is pushed into the cavity again through the L-shaped rod 385 and the moving rod 386, and the air suction pump 34 synchronously extracts the shrinkage waste gas in the cavity. After the secondary air extraction, the sealing block 37 is reset, the waste gas in the cavity is completely removed, and pores are avoided on the top surface of the finished product.

[0055] Finished product forming: After the secondary air extraction and shaping are completed, the cooling system of the upper mold 17 and the lower mold 13 continues 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 driving assembly 21 drives the compression frame 22 to reset upward, the cavity is opened, the shaped ship aluminum alloy porthole frame is taken out, and one cycle of die casting is completed.

[0056] Although embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application 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, It includes: Die casting device (1) can be cast to molten aluminum alloy; Shaping device (2) is arranged in the middle of the die casting device (1) and extends upward for a part, the shaping device (2) can cooperate with the die casting device (1) to shape and flatten the top of the semi-solid aluminum alloy; Suction device (3) is arranged in the center of the right end of the middle of the die casting device (1), and the suction device (3) can cooperate with the die casting device (1) and the shaping 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 shaping device (2) to suck the exhaust gas in the secondary cavity, and the quality of the aluminum alloy forging is improved; The die casting device (1) comprises: Support platform (11) for supporting the top connected parts; Four leg (12) is arranged on the top left end of the support platform (11); Lower mold (13) is arranged on the top of the four leg (12), and the top of the lower mold (13) is provided with positioning pin (14) at four corners; L-shaped support plate (15) is arranged on the left end close to the rear side of the outer wall of the support platform (11); Hydraulic push rod (16) is arranged at the front end center of the inner wall top surface of the L-shaped support plate (15); Upper mold (17) is arranged on the pushing end of the hydraulic push rod (16); Pin hole (110) is arranged at four corners of the bottom surface of the upper mold (17), and four pin holes (110) are matched with four positioning pins (14); 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) penetrates into the inner cavity of the side gate (18); Heat preservation furnace (112) is arranged in one end of the top of the injection mechanism (111), and the inner cavity of the heat preservation furnace (112) penetrates into the injection mechanism (111); The suction device (3) comprises: Electric push rod (31) is arranged at the right end center of the top surface of the support platform (11); Support plate (32) is arranged on the pushing end of the electric push rod (31); Identification sensor (33) is arranged at the left end center of the top surface of the support plate (32), and the identification sensor (33) is electrically connected with the electric push rod (31); Air suction pump (34) is arranged at the right end center of the top surface of the support plate (32); High temperature resistant telescopic suction tube (35) is arranged 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); Arc block (36) is arranged at the upper and lower ends of the left side of the high temperature resistant telescopic suction tube (35); Sealing block (37) is arranged on the left end of the outer wall of the two arc blocks (36), the sealing block (37) is embedded in the left end of the suction hole (19), and the sealing block (37) can be limited to move left and right in the suction hole (19); Second drive device (38) is arranged at the top surface rear end left corner of the support plate (32), and the moving end of the second drive device (38) is embedded in the high-temperature-resistant telescopic suction tube (35) and connected and fixed with one end of the sealing block (37), the second drive device (38) can drive the sealing block (37) to move left and right in the suction hole (19); The second drive device (38) comprises: Second gear (381) is arranged at the left end center of the top surface of the support plate (32) through the second bearing; Second brake motor (382) is arranged at the left end center of the bottom surface of the support plate (32), and the rotating end of the second brake motor (382) is connected and fixed with the second gear (381), the second brake motor (382) can drive the second gear (381) to rotate; Second rack (383) is arranged at the top surface rear end left corner of the support plate (32), and the second rack (383) is engaged with the second brake motor (382); Limiting block (384) is sleeved on the left end outer wall close to the second rack (383), and the second brake motor (382) can be limited to move left and right in the limiting block (384); L-shaped rod (385) is arranged at the left end top surface of the second rack (383), and the top end of the L-shaped rod (385) extends through the center outer wall of the high-temperature-resistant telescopic suction tube (35) to the high-temperature-resistant telescopic suction tube (35); Moving rod (386) is arranged at the top end of the L-shaped rod (385), and the moving rod (386) is located in the center of the high-temperature-resistant telescopic suction tube (35), and the left end of the moving rod (386) is connected and fixed with the right end of the sealing block (37).

2. The die casting apparatus for a die cast aluminum alloy forging for a ship according to claim 1, characterized by The upper mold (17) comprises: Mold plate (171) is arranged at the pushing end of the hydraulic push rod (16); Mold connecting plate (172) is two, which is symmetrically arranged at the front and rear center of the outer wall of the mold plate (171); Mold frame (173) is annularly sleeved on the outer wall of the two mold connecting plates (172), and the left center of the outer wall of the mold frame (173) is provided with a side gate (18) penetrating left and right, and the right center of the outer wall of the mold frame (173) is provided with a suction hole (19) penetrating left and right.

3. The die casting apparatus for a die cast aluminum alloy forging for a ship according to claim 2, characterized by The plastic device (2) comprises: First drive assembly (21) is two groups, which are symmetrically arranged at the left and right end centers of the top surface of the mold plate (171); Pressing frame (22) is arranged at the moving end of the two groups of first drive assemblies (21), and the pressing frame (22) is embedded between the mold plate (171) and the mold frame (173); High-temperature-resistant infrared temperature sensor (23) is embedded in the right end center of the bottom surface of the pressing frame (22).

4. The die casting apparatus for die casting an aluminum alloy forging for a ship according to claim 3, characterized by The first drive assembly (21) can drive the pressing frame (22) to move up and down between the mold plate (171) and the mold frame (173).

5. A die casting apparatus for die casting an aluminum alloy forging for a ship according to claim 4, characterized in that, The first drive assembly (21) comprises: Supporting block (211) is arranged at one end center of the top surface of the mold plate (171); A first gear (212) is arranged at the center of the front side of the outer wall of the support block (211) through a first bearing; A first brake motor (213) is arranged at the center of the back side of the outer wall of the support block (211), the rotating end of the first brake motor (213) is fixedly connected with the back end center of the first gear (212), the first brake motor (213) can drive the first gear (212) to rotate, and the first brake motor (213) is electrically connected with the high-temperature-resistant infrared temperature sensor (23); A first rack (214) is arranged at one end of the top surface of the pressing frame (22), one end of the first rack (214) is meshed with the first gear (212), and the first brake motor (213) can drive the first gear (212) to rotate and drive the first rack (214) to move up and down to limit the movement of the pressing frame (22).

6. A die casting apparatus for die casting an aluminum alloy forging for a ship according to claim 5, characterized in that, The second brake motor (382) drives the second gear (381) to rotate and drives the second rack (383) to move left and right to limit the movement of the L-shaped rod (385), so as to drive the sealing block (37) to move left and right in the suction hole (19) and the cavity of the upper mold (17) through the moving rod (386).

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