A low pressure casting machine for the production of large thin-walled parts

Abstract

The present invention relates to a low-pressure casting machine for the production of large thin-walled parts, including a frame, on which an exhaust mechanism, a movable mold mechanism, a casting platform, a holding furnace mechanism, a demoulding mechanism and a hydraulic mechanism are installed, the casting platform is located in the middle of the frame, and the movable mold mechanism is located above the casting platform, and the holding furnace mechanism is located below the casting platform, and the movable mold mechanism is installed on the frame through an auxiliary guide device, and is lifted and lowered along the auxiliary guide device. The present invention can be 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.

Description

Technical Field

[0001] The invention 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, and 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 insulation 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 a variety of mold switching production, 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 during mold opening, convenience of furnace changing, manual operability, etc. Therefore, the present invention is proposed. Summary of the invention

[0003] In view of the above-mentioned technical problems of the prior art, the purpose of the present invention 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, and 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 object, the present invention is achieved through the following technical solutions:

[0005] A low-pressure casting machine for producing large thin-walled parts comprises a frame, on which an exhaust mechanism, a movable mold mechanism, a casting platform, a holding furnace mechanism, a demoulding mechanism and a hydraulic mechanism are installed, 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 is lifted and lowered along the auxiliary guide device; the demoulding mechanism comprises an ejector, the ejector comprises a mounting plate, a driving oil cylinder and a guide column are provided on the mounting plate, and a push rod connecting plate is provided below the mounting plate, a push rod is installed below the push rod connecting plate, and the guide column passes through the push rod connecting plate; the holding furnace mechanism comprises a crucible holding furnace and a holding furnace lifting mechanism installed on the frame, the crucible holding furnace is connected to the holding furnace lifting mechanism, and is lifted and lowered along the holding furnace lifting mechanism, and a multi-hole furnace cover is provided above the crucible holding furnace, and a furnace exhaust device, an air inlet and outlet filling device and an automatic electrical quick plug device are provided on the outer side of the crucible holding furnace.

[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, and a lubrication gear is provided below the synchronization gear. 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 device 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 flipping drive 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 four corners of the moving template.

[0008] A guide sleeve is sleeved on the guide column.

[0009] The heat preservation furnace lifting mechanism is provided with a lifting self-locking induction device.

[0010] The low-pressure casting machine is connected to a cooling mechanism through a pipeline, and the pipeline is installed on a drag chain, and the drag chain is installed above the frame; a mold temperature control system and an automatic cooling docking mechanism are installed on the frame, and the automatic cooling 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.

[0011] The frame is provided with a mold negative pressure extraction device and a material receiving mechanism, the material receiving mechanism comprises a rotating arm, and a material receiving tray is provided on the rotating arm.

[0012] 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 a 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.

[0013] The low-pressure casting machine for producing large thin-walled parts of the present invention has the following beneficial effects:

[0014] 1. The present invention is compatible with a variety of molds for switching production, and has a sufficiently large mold opening and closing capacity, and can adapt to the production of large mold cavities and large-area aluminum alloy products.

[0015] 2. The movable mold mechanism in the present invention 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 device to ensure the parallelism during the opening and closing process of the mold. The data is monitored in real time to increase the position accuracy of the product parting surface.

[0016] 3. The present invention is provided with a mold temperature control system. The mold can be operated after being loaded through the mold loading trolley, and no manual intervention is required for the docking of water, electricity and other energy pipelines. The insulation furnace mechanism is provided with an automatic electrical quick-plug mechanism. After the equipment is connected to the furnace changing trolley, the furnace can be quickly changed to ensure uninterrupted production of the equipment. It is compatible with the equipment expansion function and meets the joint production of multiple large-scale equipment, forming an automated operation of the entire line, greatly improving the production efficiency of large-scale aluminum alloy castings. At the same time, it has a high degree of automation, and only one person is required to carry out production operations, which greatly reduces the intensity of manual operation and saves labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0018] Figure 2 It is a rear view structural schematic diagram of the present invention;

[0019] Figure 3 It is a schematic diagram of the installation position relationship of the ejection device in the present invention;

[0020] Figure 4 It is a structural schematic diagram of the movable mold synchronization mechanism in the present invention;

[0021] Figure 5 It is a structural schematic diagram of the movable mold parallelism detection structure in the present invention;

[0022] Figure 6 It is a structural schematic diagram of the movable mold turning mechanism in the present invention;

[0023] Figure 7 and 8 It is a structural schematic diagram of the ejection device in the present invention;

[0024] Fig. 9 It is a structural schematic diagram of the cooling automatic docking mechanism in the present invention;

[0025] Fig.10 It is a structural schematic diagram of the two-stage telescopic water return device in the present invention;

[0026] Fig.11 It is a structural schematic diagram of the casting platform in the present invention;

[0027] Among them, 1 is a frame, 2 is a casting platform, 3 is a moving template, 4 is a transmission shaft, 5 is a synchronous gear, 6 is a lubrication gear, 7 is a synchronous rack, 8 is a guide column, 9 is a displacement sensor, 10 is a sensor induction block, 11 is a flip drive cylinder, 12 is a hinge, 13 is a locking mechanism, 14 is a mounting plate, 15 is a drive cylinder, 16 is a guide column, 17 is a push rod connecting plate, 18 is a push rod, 19 is a guide sleeve, 20 is a crucible insulation furnace, 21 is an insulation furnace lifting mechanism, 22 is a multi-hole furnace cover, 23 is an auxiliary guide device, 24 is a furnace exhaust device, 25 is an air intake and exhaust filling device, 26 is an automatic electrical quick plug device, 27 is a lifting self-locking induction device, 28 is a pipeline , 29 is a cooling mechanism, 30 is a drag chain, 31 is a mold temperature control system, 32 is a cooling automatic docking mechanism, 33 is a water inlet block on the equipment side, 34 is a water inlet block on the mold side, 35 is a sealing ring pressure plate, 36 is a pressure plate positioning pin, 37 is a sealing ring, 38 is a rotating arm, 39 is a receiving tray, 40 is a water vapor separation device, 41 is an exhaust device, 42 is a two-level telescopic water return device, 43 is a lower mold water return tank, 44 is a two-level telescopic drain pipe, 45 is a telescopic fault-tolerant device, 46 is a storage pressure relief water tank, 47 is a water vapor separation cylinder, 48 is a movable mold mechanism, 49 is an ejection device, 50 is a mold negative pressure extraction device, 51 is a fixed threaded sleeve, 52 is a flip shaft, and 53 is a lock core. DETAILED DESCRIPTION

[0028] The present invention is further described below in conjunction with specific embodiments, but the protection scope of the present invention is not limited thereto.

[0029] like Figure 1-11 As shown, the low-pressure casting machine for producing large thin-walled parts of the present invention includes a frame 1, on which are installed an exhaust mechanism, a movable mold mechanism 48, a casting platform 2, a holding furnace mechanism, a demolding 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 26.

[0030] 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. While increasing the force, it is very convenient to disassemble and solves the problem of difficult replacement of threads.

[0031] 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 30, and the drag chain 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.

[0032] As a preferred embodiment, the movable mold mechanism 48 in 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 transmission shaft 4 installed on both sides of the movable mold plate 3, a synchronization gear 5 is provided at both ends of the transmission shaft 4, a lubrication gear 6 is provided below the synchronization gear 5, and a synchronization rack 7 is provided on the frame 1, and the synchronization gear 5 and the lubrication gear 6 are both meshed with the synchronization rack 7. The movable mold synchronization mechanism is subjected to mechanical synchronization, and the synchronization of the equipment when opening the mold is rigidly corrected through the rigidity of the connection and unloading structure; the movable mold synchronization mechanism is formed by the gear rack installed on the four corners of the movable mold plate 3, and the synchronization effect is achieved through the rigid connection between the four gears, ensuring that the four corners of the movable mold plate 3 are on the same horizontal line at the moment of opening the movable mold. The movable mold parallelism detection device includes a guide column 8 installed above the movable mold plate 3, and the guide columns 8 are 4, and the four guide columns 8 are respectively located at the four corners of the movable mold plate 3. A displacement sensor 9 is provided on the guide column 8, and a sensor sensing block 10 is provided on the displacement sensor 9. It is equivalent to being composed of 4 groups of displacement sensors. 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.

[0033] Further, the movable mold flipping mechanism in the present invention includes a flipping drive oil cylinder 11 and a hinge 12 connected to the movable mold plate 3, a flip shaft 52 is connected to the hinge 12, the flip shaft 52 is connected to the flipping drive oil cylinder 11, a locking mechanism 13 is provided on one side of the flipping drive oil cylinder 11, and a lock core 53 is provided on the movable mold plate 3. The movable mold flipping mechanism drives the movable mold plate 3 to flip through the two flipping drive oil cylinders 11, driving the mold installed on the movable mold plate 3 to rotate together. After the maintenance is completed, the movable mold plate 3 returns to a horizontal position, and the two lock cores 53 on the movable mold plate 3 enter the locking mechanism 13 to fix and lock the mold, which greatly reduces the difficulty of mold operation and facilitates user operation and maintenance.

[0034] Preferably, the demoulding mechanism in the present invention includes an ejection device 49, which includes a mounting plate 14, on which a driving cylinder 15 and a guide column 16 are provided, and a guide sleeve 19 is sleeved on the guide column 16. A push rod connecting plate 17 is provided below the mounting plate 14, and a push rod 18 is installed below the push rod connecting plate 17, and the guide column 16 passes through the push rod connecting plate 17. The demoulding mechanism is equipped with double cylinder ejection to meet the ejection of wide-body castings; and there are 12 push rods 18, which are detachable and freely adjustable in length, and the corresponding height is adjusted according to different molds; the push rod 18 is installed on the push rod connecting plate 17, and the push rod connecting plate 17 is guided by 6 guide columns 16 to ensure smooth and reliable ejection.

[0035] The demoulding mechanism in the present invention is used to eject the product from the mold after the mold is opened. After the casting is completed, the casting is opened with the movable mold mechanism 48 driven by the movable mold of the equipment, and the driving cylinder 15 drives the ejector rod 18 to eject downward, ejecting the product from the movable mold mechanism 48 to complete the product casting production.

[0036] The holding furnace mechanism of the present invention includes a crucible holding furnace 20 and a holding furnace lifting mechanism 21 installed on a frame 1. The crucible holding furnace 20 is connected to the holding furnace lifting mechanism 21 and is lifted and lowered 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 plug device 26 are provided on the outside of the crucible holding furnace 20.

[0037] In the crucible inside the aluminum liquid storage and insulation furnace, there is a heating resistor belt on the outer ring of the crucible, which controls the temperature of the aluminum liquid in the crucible by heating the resistor belt; an insulation layer is designed on the outer side of the resistance belt, which stores heat, keeps the furnace temperature stable, and saves heating energy. During production, the crucible insulation furnace 20 lifts the liquid riser pipe mouth to the bottom of the mold feed port through the insulation furnace lifting mechanism 21, aligns and fits, fills the crucible insulation furnace 20 with dry compressed air, and allows the aluminum liquid to enter the mold cavity for filling and pressure-maintaining production; by arranging the liquid riser pipes at different intervals, the casting production of various products can be achieved.

[0038] The crucible insulation furnace 20 in the present invention adopts multiple layers of various insulation materials, and achieves the best insulation performance and 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 waste heat of the exhaust gas heats and insulates the heat storage device, and the waste heat is recycled to achieve energy saving effect.

[0039] The frame 1 is provided with a mold negative pressure extraction device 50 and a material receiving mechanism, the material receiving mechanism includes a rotating arm 38, and a material receiving tray 39 is installed on the rotating arm 38. The exhaust mechanism includes a water vapor separation device 40, an exhaust device 41, a secondary telescopic water return device 42, and a lower mold water return tank 43. The secondary telescopic water return device 42 includes a secondary telescopic drainage pipe 44 installed on the frame 1, the secondary telescopic drainage pipe 44 is connected to a telescopic fault-tolerant device 45, the telescopic fault-tolerant device 45 is connected to a storage pressure relief water tank 46 through a pipeline, and a water vapor separation cylinder 47 is connected above the storage pressure relief water tank 46.

[0040] 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 is free of jamming, wear and other problems during movement and contraction.

[0041] When in use, after the molten metal solution is added to the crucible insulation furnace 20, the insulation furnace lifting mechanism 21 lifts the crucible insulation furnace 20 to the top of the multi-hole furnace cover 22, and the liquid riser is connected to the mold. The air inlet and outlet filling device 25 presses dry air into the furnace body cavity of the crucible insulation furnace 20, so that the metal solution is pressed into the mold cavity through the pipeline connected to the mold for production. After the production is completed, after the upper mold turning mechanism is opened, the product ejection device 49 ejects the product and drops it into the product receiving tray 39, and then the receiving tray 39 receives the product and then unloads the product to complete the cycle.

[0042] The above embodiments are only used to explain the inventive concept of the present invention, rather than to limit the protection of the rights of the present invention. Any non-substantial changes to the present invention using this concept shall fall within the protection scope 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, and 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 is lifted and lowered along the auxiliary guide device; the demoulding mechanism includes an ejector device, and the ejector device includes a mounting plate, a driving cylinder and a guide column are provided on the mounting plate, and a push rod connecting plate is provided below the mounting plate, a push rod is installed below the push rod connecting plate, and the guide column passes through the push rod connecting plate; the The insulation furnace mechanism includes a crucible insulation furnace and an insulation furnace lifting mechanism installed on a frame, the crucible insulation furnace is connected to the insulation furnace lifting mechanism, and rises and falls along the insulation furnace lifting mechanism, and a multi-porous furnace cover is provided above the crucible insulation 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 insulation furnace; a mold temperature control system and a cooling automatic docking mechanism are installed on the frame, and the cooling automatic docking mechanism includes an equipment side water inlet block and a mold side water inlet block, 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.

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 and a movable mold parallelism detection mechanism; the movable mold parallelism detection mechanism includes a guide column installed above the movable mold plate, the guide column is provided with a displacement sensor, and the displacement sensor is provided with a sensor sensing block.

3. The low pressure casting machine for producing large thin-walled parts according to claim 1, characterized in that: The movable mold mechanism also includes a movable mold synchronization 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, and a lubrication gear is provided below the synchronization gear. 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 flipping mechanism includes a flipping drive cylinder and a hinge connected to the movable mold plate, a flipping shaft is connected to the hinge, and the flipping shaft is connected to the flipping drive cylinder, and a locking mechanism is provided on one side of the flipping drive cylinder.

4. 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 four corners of the moving template.

5. The low pressure casting machine for producing large thin-walled parts according to claim 1, 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 heat preservation furnace lifting mechanism is provided with a lifting self-locking induction device.

7. 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 via a pipeline, the pipeline is installed on a drag chain, and the drag chain is installed above the frame.

8. The low pressure casting machine for producing large thin-walled parts according to claim 7, characterized in that: The frame is provided with a mold negative pressure extraction device and a material receiving mechanism, the material receiving mechanism comprises a rotating arm, and a material receiving tray is provided on the rotating arm.

9. 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 a 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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