Low-pressure casting machine for large thin-wall part production

Abstract

The utility model relates to a low-pressure casting machine for producing a large thin-walled workpiece, which comprises a rack, an exhaust mechanism, a movable mold mechanism, a casting platform, a holding furnace mechanism, a demolding mechanism and a hydraulic mechanism are mounted on the rack, and the casting platform is positioned in the middle of the rack. The movable mold mechanism is located above the casting platform, the heat preservation furnace mechanism is located below the casting platform, and the movable mold mechanism is installed on the machine frame through an auxiliary guiding device and ascends and descends along the auxiliary guiding device. The die switching mechanism can be compatible with various dies for switching production, has enough die opening and closing capacity, and can be suitable for production of large-die-cavity and large-area aluminum alloy products; and the mold opening stability, the furnace changing convenience, the manual operability and the like are greatly improved.

Description

Technical Field

[0001] The utility model relates to a low-pressure casting machine, in particular to a low-pressure casting machine used for producing large thin-walled parts, and belongs to the technical field of casting equipment. Background Art

[0002] Low-pressure casting machine is a general-purpose equipment for low-pressure casting of aluminum alloys, which can be widely used in the production of aluminum alloy castings in automobiles, motorcycles, instruments, textile machinery and aerospace industries. The low-pressure casting machine is composed of a main machine, a hydraulic system, a molten pool holding furnace, a liquid surface pressurizing device, an electrical control system and a mold cooling system. The low-pressure casting machine in the prior art is not compatible with the production of multiple mold switching, and its versatility is far from enough. In particular, the opening and closing ability is poor, which is not friendly enough for the production of large mold cavities and large-area aluminum alloy products. In addition, the low-pressure casting machine in the prior art needs to be further improved in terms of stability when opening the mold, convenience of changing furnaces, manual operability and other aspects. Therefore, the present utility model is proposed. Utility Model Content

[0003] In response to the above-mentioned technical problems of the prior art, the purpose of the present utility model is to provide a low-pressure casting machine for the production of large thin-walled parts, which is compatible with a variety of molds for switching production, and at the same time has a sufficiently large mold opening and closing capacity, which can adapt to the production of large mold cavities and large-area aluminum alloy products; and has greatly improved in mold opening stability, furnace changing convenience, manual operability and other aspects.

[0004] To achieve the above-mentioned purpose, the present invention is realized through the following technical solutions:

[0005] A low-pressure casting machine for producing large thin-walled parts includes a frame, on which are mounted an exhaust mechanism, a movable mold mechanism, a casting platform, a holding furnace mechanism, a demoulding mechanism, and a hydraulic mechanism. The casting platform is located in the middle of the frame, the movable mold mechanism is located above the casting platform, and the holding furnace mechanism is located below the casting platform. The movable mold mechanism is mounted on the frame via an auxiliary guide device and rises and falls along the auxiliary guide device.

[0006] The movable mold mechanism includes a movable mold plate, a movable mold synchronization mechanism, a movable mold parallelism detection mechanism and a movable mold flipping mechanism; the movable mold synchronization mechanism includes a transmission shaft installed on both sides of the movable mold plate, and synchronization gears are provided at both ends of the transmission shaft. A lubrication gear is provided below the synchronization gear, and a synchronization rack is provided on the frame, and the synchronization gear and the lubrication gear are both engaged with the synchronization rack; the movable mold parallelism detection mechanism includes a guide column installed above the movable mold plate, and a displacement sensor is provided on the guide column, and a sensor sensing block is provided on the displacement sensor; the movable mold flipping mechanism includes a flip driving cylinder and a hinge connected to the movable mold plate, and a flip shaft is connected to the hinge, and the flip shaft is connected to the flip driving cylinder, and a locking mechanism is provided on one side of the flip driving cylinder.

[0007] There are four guide pillars, which are respectively located at the four corners of the movable template.

[0008] The demoulding mechanism includes an ejection device, which includes a mounting plate. A push rod connecting plate driven by a driving cylinder is provided below the mounting plate. Several push rods are provided below the push rod connecting plate. A guide column is provided below the mounting plate. The guide column passes through the push rod connecting plate, and the push rod connecting plate rises and falls along the guide column.

[0009] A guide sleeve is sleeved on the guide column.

[0010] The holding furnace mechanism includes a crucible holding furnace and a holding furnace lifting mechanism installed on a frame. The crucible holding furnace is connected to the holding furnace lifting mechanism and rises and falls along the holding furnace lifting mechanism. A multi-porous furnace cover is provided above the crucible holding furnace, and a furnace exhaust device, an air intake and exhaust filling device and an automatic electrical quick plug device are provided on the outside of the crucible holding furnace.

[0011] The holding furnace lifting mechanism is provided with a lifting self-locking induction device.

[0012] The low-pressure casting machine is connected to a cooling mechanism through a pipeline, and the pipeline is installed on the drag chain 2, and the drag chain 2 is installed above the frame; the frame is installed with a mold temperature control system and a cooling automatic docking mechanism, and the cooling automatic docking mechanism includes an equipment side water inlet block and a mold side water inlet block, and a sealing ring pressure plate is provided between the equipment side water inlet block and the mold side water inlet block, and the equipment side water inlet block is provided with a pressure plate positioning pin and a sealing ring.

[0013] A mold negative pressure device and a material receiving mechanism are installed on the frame. The material receiving mechanism includes a rotating arm, and a material receiving tray is installed on the rotating arm.

[0014] The exhaust mechanism includes a water vapor separation device, an exhaust device, a secondary telescopic water return device and a lower mold return water tank. The secondary telescopic water return device includes a secondary telescopic drainage pipe installed on the frame. The secondary telescopic drainage pipe is connected to a telescopic fault-tolerant device. The telescopic fault-tolerant device is connected to a storage pressure relief water tank through a pipeline. A water vapor separation cylinder is connected above the storage pressure relief water tank.

[0015] The low-pressure casting machine for producing large thin-walled parts has the following beneficial effects:

[0016] 1. The utility model is compatible with a variety of molds for switching production, and has a sufficiently large mold opening and closing capacity, which can adapt to the production of large mold cavities and large-area aluminum alloy products.

[0017] 2. The movable mold mechanism in the utility model is equipped with an auxiliary guiding device to maintain the stability of the equipment when opening the mold. The top of the frame is equipped with a movable mold parallelism detection mechanism to ensure the parallelism of the mold during opening and closing. The data is monitored in real time to increase the position accuracy of the product parting surface.

[0018] 3. This utility model is equipped with a mold temperature control system. The mold can be put into operation after being loaded via the mold loading trolley, eliminating the need for manual intervention to connect water, electricity, and other energy pipelines. The holding furnace mechanism is equipped with an automatic electrical quick-connect mechanism. After the equipment is connected to the furnace-changing trolley, furnaces can be quickly changed, ensuring uninterrupted production. It is compatible with equipment expansion functions and can meet the needs of multiple large-scale equipment for joint production, forming an automated operation line. This greatly improves the production efficiency of large-scale aluminum alloy castings. At the same time, it has a high degree of automation, requiring only one person to carry out production operations, greatly reducing the intensity of manual operation and saving labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0020] Figure 2 This is a rear view structural diagram of the utility model;

[0021] Figure 3 This is a schematic diagram of the installation position relationship of the ejection device in the present utility model;

[0022] Figure 4 It is a structural diagram of the movable mold synchronization mechanism in the present utility model;

[0023] Figure 5 It is a structural diagram of the movable mold parallelism detection mechanism in the present utility model;

[0024] Figure 6 It is a structural diagram of the movable mold turning mechanism in the present utility model;

[0025] Figure 7 and8 It is a structural schematic diagram of the ejection device in the utility model;

[0026] Figure 9 It is a schematic diagram of the cross-sectional structure of the ejection device;

[0027] Figure 10 Schematic diagram of the positional relationship between the guide post and the guide sleeve;

[0028] Figure 11 It is a structural diagram of the anti-loosening mechanism;

[0029] Figure 12 This is a schematic structural diagram of the cooling automatic docking mechanism in the present invention;

[0030] Figure 13 This is a schematic structural diagram of the two-stage telescopic water return device in the present utility model;

[0031] Figure 14 It is a structural schematic diagram of the casting platform in the utility model;

[0032] Figure 15 It is a three-dimensional schematic diagram of the automatic electrical quick-connect device in the present utility model;

[0033] Figure 16 This is a structural diagram of the quick-connect female component of the automatic electrical quick-connect device in the present invention after removing the protective cover and the female socket;

[0034] Figure 17 This is a front view of the quick-plug male component of the automatic electrical quick-plug device in the present utility model;

[0035] Figure 18 for Figure 17 Right view;

[0036] Figure 19 This is a front view of the quick-connect female component of the automatic electrical quick-connect device in the present invention;

[0037] Figure 20 for Figure 19 Right view;

[0038] Figure 21 This is a structural diagram of the thermocouple male plug and the thermocouple female socket matching when the quick-insert female component and the quick-insert male component are inserted together;

[0039] Figure 22 It is a structural diagram of the pressure feedback plug and the intake and exhaust plug of the clamp pot insulation furnace matching with the pressure feedback jack and the intake and exhaust jack of the clamp pot insulation furnace;

[0040] Figure 23This is a structural diagram of the lifting mechanism of the holding furnace in the present utility model;

[0041] Figure 24 This is a schematic structural diagram of the furnace exhaust device in the present utility model;

[0042] Figure 25 It is a structural diagram of the air intake and exhaust filling device in the present invention;

[0043] Among them, 1 is the frame, 2 is the casting platform, 3 is the dynamic platen, 4 is the transmission shaft, 5 is the synchronous gear, 6 is the lubrication gear, 7 is the synchronous rack, 8 is the guide column, 9 is the displacement sensor, 10 is the sensor block, 11 is the flip drive cylinder, 12 is the hinge, 13 is the locking mechanism, 14 is the mounting plate, 15 is the drive cylinder, 16 is the guide column, 17 is the ejector connecting plate, 18 is the ejector, 19 is the guide sleeve, 20 is the crucible holding furnace, 21 211 is the lifting mechanism of the holding furnace, 212 is the angle gauge, 213 is the transmission shaft, 214 is the turbine synchronous lifter, 215 is the displacement sensor, 22 is the multi-hole furnace cover, 23 is the auxiliary guide device, 24 is the furnace exhaust device, 241 is the furnace exhaust port, 242 is the exhaust valve, 243 is the muffler, 25 is the air intake and exhaust filling device, 251 is the furnace air intake, 252 is the air intake pressure reducing valve, and 253 is the air intake filter.26 is an automatic electrical quick-plug device, 261 is a quick-plug male component, 2611 is a male bracket, 2612 is a male socket, 26121 is a male socket plate, 26122 is a male upper stopper, 26123 is a male lower stopper, 26124 is a male left pressure block, 26125 is a male right pressure block, 26126 is a male screw, 26127 is a spring, 26128 is a male bakelite board, 261281 is a male bakelite board left slide, 261282 is a male bakelite board right slide, 2612a is a guide sleeve, 2612b is a thermocouple male plug, 2612c is a knife switch plug, 26 12d is the pressure feedback plug of the clamp pot insulation furnace, 2612e is the intake and exhaust plug of the clamp pot insulation furnace, 262 is the quick-insert mother assembly, 2621 is the mother bracket, 2622 is the mother guide block, 26221 is the middle slide, 26222 is the side slide, 262a is the mother socket, 262a1 is the mother socket frame, 262a2 is the mother upper pressure block, 262a3 is the mother lower pressure block, 262a4 is the mother left stopper, 262a5 is the mother right stopper, 262a6 is the mother bakelite, 262a7 is the mother left spring, 262a8 is the mother right spring, 262a9 is the mother left limit screw , 262a10 is the female right limit screw, 262aa is the guide rod, 262ab is the thermocouple female socket, 262ac is the knife head switch socket, 262ad is the pressure feedback jack of the clamp pot insulation furnace, 262ae is the air inlet and outlet jack of the clamp pot insulation furnace, 262b is the protective cover, 2623 is the drag chain, 2624 is the component mounting seat, 2625 is the side pulley, 2626 is the middle pulley, 27 is the lifting self-locking sensing device, 28 is the pipeline, 29 is the cooling mechanism, 30 is the drag chain 2, 31 is the mold temperature control system, 32 is the cooling automatic docking mechanism, 33 is the water inlet block on the equipment side, 34 is the mold side The water inlet block, 35 is the sealing ring pressure plate, 36 is the pressure plate positioning pin, 37 is the sealing ring, 38 is the rotating arm, 39 is the receiving tray, 40 is the water vapor separation device, 41 is the exhaust device, 42 is the secondary telescopic return water device, 43 is the lower mold return water tank, 44 is the secondary telescopic drain pipe, 45 is the telescopic fault tolerance device, 46 is the storage pressure relief water tank, 47 is the water vapor separation cylinder, 48 is the movable mold mechanism, 49 is the ejection device, 50 is the mold negative pressure extraction device, 51 is the fixed threaded sleeve, 52 is the tilting shaft, 53 is the lock core, 54 is the oil cylinder output shaft, 55 is the oil cylinder flange, 56 is the anti-loosening bolt, and 57 is the tensioning gasket. DETAILED DESCRIPTION

[0044] The present invention will be further described below with reference to specific embodiments, but the protection scope of the present invention is not limited thereto.

[0045] like Figure 1-14As shown, the utility model is a low-pressure casting machine for the production of large thin-walled parts, including a frame 1, on which are installed an exhaust mechanism, a movable mold mechanism 48, a casting platform 2, a holding furnace mechanism, a demoulding mechanism and a hydraulic mechanism. The casting platform 2 is located in the middle of the frame 1, and the movable mold mechanism 48 is located above the casting platform 2, and the holding furnace mechanism is located below the casting platform 2. The movable mold mechanism 48 is installed on the frame 1 through an auxiliary guide device 23 and rises and falls along the auxiliary guide device 23.

[0046] The casting platform 2 in the present invention is provided with a fixed threaded sleeve 51 , which is fixed from the bottom of the casting platform 2 . This increases the force and is very convenient to disassemble, thus solving the problem of difficult thread replacement.

[0047] The low-pressure casting machine of the present invention is connected to a cooling mechanism 29 through a pipeline 28, and the pipeline 28 is installed on a drag chain 2 30, and the drag chain 2 30 is installed above the frame 1; a mold temperature control system 31 and a cooling automatic docking mechanism 32 are installed on the frame 1, and the cooling automatic docking mechanism 32 includes an equipment side water inlet block 33 and a mold side water inlet block 34, and a sealing ring pressure plate 35 is provided between the equipment side water inlet block 33 and the mold side water inlet block 34, and the equipment side water inlet block 33 is provided with a pressure plate positioning pin 36 and a sealing ring 37, which greatly improves the mold switching efficiency of the equipment, thereby improving the production capacity.

[0048] Preferably, the movable mold mechanism 48 of the present invention includes a movable mold plate 3, a movable mold synchronization mechanism, a movable mold parallelism detection mechanism, and a movable mold flipping mechanism. The movable mold synchronization mechanism includes a drive shaft 4 mounted on both sides of the movable mold plate 3. Synchronous gears 5 are provided at both ends of the drive shaft 4. A lubrication gear 6 is provided below the synchronous gear 5. A synchronous rack 7 is provided on the frame 1. Both the synchronous gear 5 and the lubrication gear 6 engage with the synchronous rack 7. The movable mold synchronization mechanism is mechanically synchronized and, through the rigidity of the connecting and unloading structure, rigidly corrects the synchronization of the equipment during mold opening. The movable mold synchronization mechanism is composed of gears and racks mounted on the four corners of the movable mold plate 3. The rigid connection between the four gears achieves synchronization, ensuring that the four corners of the movable mold plate 3 are aligned at the same horizontal line at the moment of opening. The movable mold parallelism detection mechanism includes four guide posts 8 mounted above the movable mold plate 3, one at each corner of the movable mold plate 3. Displacement sensors 9 are provided on the guide posts 8, each of which is equipped with a sensor block 10. It is equivalent to being composed of 4 groups of displacement sensors, and the 4 guide pillars 8 drive the dynamic template 3 to move; the sensor sensing block 10 detects the moving distance on each guide pillar 8, and the 4 displacement sensors 9 read the values ​​in real time to ensure that the lifting distance of each corner is consistent, ensuring the parallelism of the template opening.

[0049] Furthermore, the movable mold flipping mechanism of the present invention includes a flip-driving oil cylinder 11 and a hinge 12 connected to the movable platen 3. The hinge 12 is connected to a flip shaft 52, which is connected to the flip-driving oil cylinder 11. A locking mechanism 13 is provided on one side of the flip-driving oil cylinder 11, and a lock core 53 is provided on the movable platen 3. The movable mold flipping mechanism drives the movable platen 3 to flip via the two flip-driving oil cylinders 11, driving the mold mounted on the movable platen 3 to rotate together. After maintenance is completed, the movable platen 3 returns to a horizontal position, and the two lock cores 53 on the movable platen 3 enter the locking mechanism 13 to securely lock the mold, greatly reducing the difficulty of mold operation and facilitating user operation and maintenance.

[0050] Preferably, the demolding mechanism of the present invention includes an ejection device 49. The ejection device 49 includes a push rod connecting plate 17 driven by a driving cylinder 15, disposed below the mounting plate 14. The driving cylinder 15 is provided with a cylinder output shaft 54, which is connected to the push rod connecting plate 17. A cylinder flange 55 is provided between the driving cylinder 15 and the push rod connecting plate 17. Several push rods 18 are disposed below the push rod connecting plate 17. A guide column 16 is disposed below the mounting plate 14. The ends of the guide columns 16 are provided with guide sleeves 19. There are six guide columns 16, which are disposed on both sides of the mounting plate 14 and the push rod connecting plate 17, respectively. There are twelve push rods 18, which are distributed around the periphery of the push rod connecting plate 17. The guide columns 16 pass through the push rod connecting plate 17, and the push rod connecting plate 17 rises and falls along the guide columns 16.

[0051] Furthermore, an anti-loosening mechanism is provided at the connection between the ejector rod 18 and the ejector rod connecting plate 17. The anti-loosening mechanism can be an anti-loosening bolt 56, and a tensioning gasket 57 is provided at the connection between the anti-loosening bolt 56 and the ejector rod connecting plate 17. There are two drive cylinders 15, which are arranged side by side on the mounting plate 14, and a double-cylinder ejection method is adopted to meet the ejection requirements of wide-body castings. The ejector rod 18 is detachable and its length can be freely adjusted. The corresponding height can be adjusted according to different molds. The ejector rod 18 is installed on the ejector rod connecting plate 17, and the ejector rod connecting plate 17 is guided by six guide columns 16 to ensure smooth and reliable ejection.

[0052] When in use, the ejection mechanism is installed on the movable template 3, and the ejector rod 18 passes through the movable template 3. After the casting is completed, the ejector rod connecting plate 17 is driven by the oil cylinder 15, so that the ejector rod connecting plate 17 moves up and down guided by the guide column 16, thereby driving the ejector rod 18 to push downward, thereby achieving the goal of ejecting the product from the mold, and the operation is convenient, and the ejection is smooth and reliable.

[0053] The holding furnace mechanism of the present invention includes a crucible holding furnace 20 and a holding furnace lifting mechanism 21 mounted on a frame 1. The crucible holding furnace 20 is connected to the holding furnace lifting mechanism 21 and rises and falls along the holding furnace lifting mechanism 21. The holding furnace lifting mechanism 21 is provided with a lifting self-locking induction device 27. A multi-porous furnace cover 22 is provided above the crucible holding furnace 20, and a furnace exhaust device 24, an air intake and exhaust filling device 25, and an automatic electrical quick-connect device 26 are provided on the outside of the crucible holding furnace 20.

[0054] Automatic electrical quick-insertion device 26 wherein as Figures 15 to 22 As shown, it includes a quick-plug male component 261 and a quick-plug female component 262. The quick-plug male component 261 is composed of a male bracket 2611 and a male socket 2612 fixed together. The structure of the quick-plug female component 262 is: a female guide rail block 2622 is fixed on the female bracket 2621, a middle slide groove 26221 is formed in the middle of the female guide rail block 2622, and side slide grooves 26222 are formed on both sides of the female guide rail block 2622. The component mounting seat 2624 is a grooved plate, and a middle slide groove 26221 is installed on the component mounting seat 2624. The upper pulley 2626 and the side pulley 2625, the component mounting seat 2624 are inserted into the mother guide rail block 2622, the side pulley 2625 is inserted into the side slide groove 26222 and moves linearly along the side slide groove 26222, the middle pulley 2626 is inserted into the middle slide groove 26221 and moves linearly along the middle slide groove 26221, the mother socket 262a is fixed on the component mounting seat 2624; one end of the drag chain 2623 is fixed to the mother bracket 2621, and the other end is fixed to the mother socket 262a.

[0055] The structure of the male socket 2612 is as follows: the male socket plate 26121 is fixed to the male bracket 2611, the male bracket 2611 is fixed to the clamp pot insulation furnace 20, the upper and lower ends of the male socket plate 26121 are respectively fixed with a male upper stopper 26122 and a male lower stopper 26123 by screws, the left and right ends of the male socket plate 26121 are respectively fixed with a male left pressure block 26124 and a male right pressure block 26125 by screws, the left and right ends of the male bakelite board 26128 are respectively formed with a male bakelite left slide 261281 and a male bakelite right slide 261282, and the male bakelite board 26128 is placed in the middle of the male socket plate 26121 , the male left pressure block 26124 and the male right pressure block 26125 are respectively inserted into the left slide 261281 and the right slide 261282 of the male bakelite board; the male upper stopper 26122 and the male lower stopper 26123 are both screwed with a male screw 26126, and the spring 26127 is inserted into the male screw 26126. One end of the upper spring 26127 presses on the upper end surface of the male bakelite board 26128, and the other end presses on the male upper stopper 26122. One end of the lower spring 26127 presses on the lower end surface of the male bakelite board 26128, and the other end presses on the male lower stopper 26123. The male bakelite board 26128 is fixed There is a guide sleeve 2612a and a number of male plugs; the structure of the female socket 262a is: the upper and lower ends of the female socket frame 262a1 are respectively fixed by screws with a female upper pressure block 262a2 and a female lower pressure block 262a3, the left and right ends of the female socket frame 262a1 are respectively fixed by screws with a female left block 262a4 and a female right block 262a5, the upper and lower ends of the female bakelite 262a6 are respectively pressed on the lower part of the female upper pressure block 262a2 and the female lower pressure block 262a3, the female upper pressure block 262a2 and the female lower pressure block 262a3 are both angle iron-shaped, and one end of the female left spring 262a7 is pressed on the left end surface of the female bakelite 262a6 The mother stage right limit screw 262a9 is screwed on the mother stage left stopper 262a4 and its front end faces the left end face of the mother stage bakelite board 262a6. The mother stage right limit screw 262a10 is screwed on the mother stage right stopper 262a5 and its front end faces the right end face of the mother stage bakelite board 262a6. A guide rod 262aa and several mother stage socket plug-in components are fixed on the mother stage bakelite board 262a6. The guide rod 262aa is opposite to the guide sleeve 2612a.

[0056] Several male plugs are thermocouple male plug 2612b, knife head switch plug 2612c, clamp pot insulation furnace pressure feedback plug 2612d and clamp pot insulation furnace air inlet and exhaust plug 2612e; several female socket mating components are thermocouple female socket 262ab, knife head switch socket 262ac, clamp pot insulation furnace pressure feedback jack 262ad and clamp pot insulation furnace air inlet and exhaust jack 262ae; the thermocouple male plug 2612b, knife head switch plug 2612c, clamp pot insulation furnace pressure feedback plug 2612d and clamp pot insulation furnace air inlet and exhaust plug 2612e are respectively opposite to the thermocouple female socket 262ab, knife head switch socket 262ac, clamp pot insulation furnace pressure feedback jack 262ad and clamp pot insulation furnace air inlet and exhaust jack 262ae.

[0057] The male bracket 2611 is formed on the tong pot holding furnace 20, while the female bracket 2621 is fixed to the frame 1. The front end of the guide rod 262aa is spherical, and the front portion of the guide rod 262aa gradually decreases from right to left. The female socket frame 262a1 is screwed to the component mounting base 2624. The protective cover 262b is also screwed to the mounting base 2624 and the female socket frame 262a1, covering the female socket 262a.

[0058] The working principle of the automatic electrical quick-plug device 26 of the present invention is as follows: one end of the drag chain 2623 is fixed to the female bracket 2621, and the other end is fixed to the female socket 262a; by fixing the position of the drag chain 2623, the female socket 262a can be positioned opposite to the male socket 2612. When the male socket 2612 is inserted into the female socket 262a, the guide rod 262aa is inserted into the guide sleeve 2612a, and the male bakelite board 26128 has a certain degree of mobility on the male socket board 26121. At the same time, the female bakelite board 262a6 is in the The female socket frame 262a1 has a certain degree of mobility, and the guide rod 262aa and the guide sleeve 2612a will guide the male bakelite board 26128 and the male socket board 26121 to be completely and accurately aligned, so that the thermocouple male plug 2612b, the knife switch plug 2612c, the clamp pot insulation furnace pressure feedback plug 2612d and the clamp pot insulation furnace air inlet and exhaust plug 2612e are accurately inserted into the thermocouple female socket 262ab, the knife switch socket 262ac, the clamp pot insulation furnace pressure feedback jack 262ad and the clamp pot insulation furnace air inlet and exhaust jack 262ae respectively.

[0059] In addition, the holding furnace lifting mechanism 21 of the present invention includes a lifting drive motor 211, which drives a transmission shaft 213. A turbine synchronous lifter 214 is provided on the transmission shaft 213, and a corner device 212 is provided at the end of the transmission shaft 213. The operation of the lifting drive motor 211 ultimately drives the turbine synchronous lifter 214 to operate, thereby realizing the lifting and lowering of the crucible holding furnace 20, and the height and synchronization are sensed by the displacement sensor 215, such as Figure 23 The furnace exhaust device 24 includes a furnace exhaust port 241, which is connected to a check valve 242. The exhaust of the furnace exhaust port 241 is achieved by controlling the check valve 242, and the noise is controlled by the muffler 243. Figure 24 The air intake and exhaust filling device 25 includes a furnace air intake 251, which is connected to an air intake pressure reducing valve 252 and an air intake filter 253. Figure 25 shown.

[0060] The crucible inside the molten aluminum storage and holding furnace has a heating resistor band on its outer ring, which generates heat to control the temperature of the molten aluminum in the crucible. An insulation layer is designed around the outer edge of the resistance band, storing heat to maintain a stable furnace temperature and save heating energy. During production, the crucible holding furnace 20 uses the furnace lifting mechanism 21 to raise the liquid riser nozzle to the bottom feed port of the mold, aligning it with the mold. Dry compressed air is then introduced into the crucible holding furnace 20, forcing the molten aluminum into the mold cavity for filling and pressure-maintaining production. By arranging the liquid riser tubes at varying spacings, a variety of casting products can be produced.

[0061] The crucible insulation furnace 20 in the present invention adopts multiple layers of various insulation materials, and achieves the best insulation performance and the insulation energy-saving effect through the appropriate combination of insulation cotton modules, fiberboards, and nano-boards; it is equipped with a filling heat storage device. Before the compressed air enters the furnace body, the heat storage device transfers the residual heat to the dry air for heating. When exhausting, the residual heat of the exhaust gas heats and insulates the heat storage device, and the residual heat is recycled to achieve energy-saving effect.

[0062] Mounted on the frame 1 are a mold vacuum pumping device 50 and a material receiving mechanism. The receiving mechanism includes a rotating arm 38, on which is mounted a material receiving tray 39. The exhaust mechanism comprises a water vapor separation device 40, an exhaust device 41, a two-stage telescopic water return device 42, and a lower mold water return tank 43. The two-stage telescopic water return device 42 comprises a two-stage telescopic drain pipe 44 mounted on the frame 1. This pipe is connected to a telescopic fault-tolerant device 45, which is connected via a pipe to a storage and pressure relief water tank 46. A water vapor separation cylinder 47 is connected above the storage and pressure relief water tank 46.

[0063] After the circulating water is used up, it is discharged into the storage pressure relief water tank 46, where water vapor separation is achieved, and the steam is discharged through the upper water vapor separation cylinder 47 to reduce the pressure in the pipeline. The cooling water enters the secondary telescopic drain pipe 44 through the pipeline and is discharged into the external equipment collection device for circulation. The secondary telescopic drain pipe 44 is connected by a telescopic fault-tolerant device 45, which can ensure that the secondary telescopic drain pipe 44 has no problems such as jamming and wear during movement and contraction.

[0064] During operation, after the molten metal solution is added to the crucible holding furnace 20, the furnace lifting mechanism 21 raises the crucible holding furnace 20 until the liquid riser port at the top of the multi-porous furnace cover 22 is connected to the mold. The air intake and exhaust filling device 25 then presses dry air into the furnace cavity of the crucible holding furnace 20, forcing the metal solution into the mold cavity through the pipe connected to the mold for production. After production is completed, the upper mold flipping mechanism opens, and the product ejection device 49 ejects the product onto the product receiving tray 39. The receiving tray 39 then receives the product and unloads it, completing the cycle.

[0065] The above embodiments are only used to illustrate the inventive concept of the present invention, and are not intended to limit the protection of the present invention. Any non-substantial changes to the present invention using this concept should fall within the scope of protection of the present invention.

Claims

1. A low-pressure casting machine for producing large thin-walled parts, comprising a frame, characterized in that: The frame is equipped with an exhaust mechanism, a movable mold mechanism, a casting platform, a holding furnace mechanism, a demoulding mechanism and a hydraulic mechanism. The casting platform is located in the middle of the frame, the movable mold mechanism is located above the casting platform, and the holding furnace mechanism is located below the casting platform. The movable mold mechanism is installed on the frame through an auxiliary guide device and rises and falls along the auxiliary guide device.

2. The low-pressure casting machine for producing large thin-walled parts according to claim 1, characterized in that: The movable mold mechanism includes a movable mold plate, a movable mold synchronization mechanism, a movable mold parallelism detection mechanism and a movable mold flipping mechanism; the movable mold synchronization mechanism includes a transmission shaft installed on both sides of the movable mold plate, and synchronization gears are provided at both ends of the transmission shaft. A lubrication gear is provided below the synchronization gear, and a synchronization rack is provided on the frame, and the synchronization gear and the lubrication gear are both engaged with the synchronization rack; the movable mold parallelism detection mechanism includes a guide column installed above the movable mold plate, and a displacement sensor is provided on the guide column, and a sensor sensing block is provided on the displacement sensor; the movable mold flipping mechanism includes a flip driving cylinder and a hinge connected to the movable mold plate, and a flip shaft is connected to the hinge, and the flip shaft is connected to the flip driving cylinder, and a locking mechanism is provided on one side of the flip driving cylinder.

3. The low-pressure casting machine for producing large thin-walled parts according to claim 2, characterized in that: There are four guide pillars, which are respectively located at the four corners of the movable template.

4. The low-pressure casting machine for producing large thin-walled parts according to claim 1, characterized in that: The demoulding mechanism includes an ejection device, which includes a mounting plate. A push rod connecting plate driven by a driving cylinder is provided below the mounting plate. Several push rods are provided below the push rod connecting plate. A guide column is provided below the mounting plate. The guide column passes through the push rod connecting plate, and the push rod connecting plate rises and falls along the guide column.

5. The low-pressure casting machine for producing large thin-walled parts according to claim 4, characterized in that: A guide sleeve is sleeved on the guide column.

6. The low-pressure casting machine for producing large thin-walled parts according to claim 1, characterized in that: The holding furnace mechanism includes a crucible holding furnace and a holding furnace lifting mechanism installed on a frame. The crucible holding furnace is connected to the holding furnace lifting mechanism and rises and falls along the holding furnace lifting mechanism. A multi-porous furnace cover is provided above the crucible holding furnace, and a furnace exhaust device, an air intake and exhaust filling device and an automatic electrical quick plug device are provided on the outside of the crucible holding furnace.

7. The low-pressure casting machine for producing large thin-walled parts according to claim 6, characterized in that: The holding furnace lifting mechanism is provided with a lifting self-locking induction device.

8. The low-pressure casting machine for producing large thin-walled parts according to claim 1, characterized in that: The low-pressure casting machine is connected to a cooling mechanism through a pipeline, and the pipeline is installed on the drag chain 2, and the drag chain 2 is installed above the frame; the frame is installed with a mold temperature control system and a cooling automatic docking mechanism, and the cooling automatic docking mechanism includes an equipment side water inlet block and a mold side water inlet block, and a sealing ring pressure plate is provided between the equipment side water inlet block and the mold side water inlet block, and the equipment side water inlet block is provided with a pressure plate positioning pin and a sealing ring.

9. The low-pressure casting machine for producing large thin-walled parts according to claim 8, characterized in that: A mold negative pressure device and a material receiving mechanism are installed on the frame. The material receiving mechanism includes a rotating arm, and a material receiving tray is installed on the rotating arm.

10. The low-pressure casting machine for producing large thin-walled parts according to claim 1, characterized in that: The exhaust mechanism includes a water vapor separation device, an exhaust device, a secondary telescopic water return device and a lower mold return water tank. The secondary telescopic water return device includes a secondary telescopic drainage pipe installed on the frame. The secondary telescopic drainage pipe is connected to a telescopic fault-tolerant device. The telescopic fault-tolerant device is connected to a storage pressure relief water tank through a pipeline. A water vapor separation cylinder is connected above the storage pressure relief water tank.

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