Rapid die casting equipment for aluminum alloy die castings

Abstract

The invention discloses rapid die casting equipment for aluminum alloy die castings, which comprises a die casting table, a fixed table, a fixed die table and a movable die table, the fixed table and the fixed die table are fixedly mounted on two sides above the die casting table, the movable die table is positioned between the fixed table and the fixed die table and is movably arranged on the die casting table, and a movable die and a fixed die are fixedly mounted on one side of each of the movable die table and the fixed die table. And a die-casting pipe is fixedly connected to one side of the fixed die table in a penetrating manner. After a die-casting rod is attached to a fixed die, an aluminum alloy solution needed by feeding is injected into the thick position of a die cavity through a feeding pressing rod under the action of water pressure, during normal feeding, a second pump quantitatively sucks out cooling water through a second connecting pipe, the first pump operates at a constant speed to push the feeding pressing rod to move at a constant speed, uniform feeding is achieved, and if a shrinkage cavity or shrinkage porosity is detected, the second pump operates at a constant speed to push the feeding pressing rod to move at a constant speed. And the second pump reduces the operation speed, increases the feeding pressure, prevents shrinkage cavities or shrinkage porosity caused by volume shrinkage when the aluminum alloy solution is cooled and formed, improves the density of castings, and further improves the quality of the castings.

Description

Technical Field

[0001] The present invention relates to the field of processing of aluminum alloy die-castings, and particularly to a rapid die-casting device for aluminum alloy die-castings. Background Technique

[0002] Due to advantages such as light weight, high strength, and good corrosion resistance, aluminum alloy die-castings are widely used in many fields such as automobiles, aerospace, and electronics. With the rapid development of various industries, the demand for aluminum alloy die-castings not only increases significantly in quantity, but also higher requirements are put forward in terms of production efficiency. The rapid die-casting device for aluminum alloy die-castings can quickly inject the molten aluminum alloy into the mold cavity under high pressure, fill every fine part of the mold, and form a die-casting that is consistent with the mold cavity after cooling and solidification.

[0003] When cooling and forming the aluminum alloy solution in a large aluminum alloy die-casting mold, since the shrinkage rate of thermal expansion and contraction is more obvious at the thicker positions during the die-casting cooling of aluminum alloy, volume shrinkage will occur at the thicker positions during the solidification process of aluminum alloy. If there is not enough molten metal to supplement, it will lead to problems such as shrinkage cavities or shrinkage porosity in the aluminum alloy solution at the thicker positions during solidification shrinkage, thereby reducing the quality of the casting.

[0004] Therefore, a rapid die-casting device for aluminum alloy die-castings is proposed. Summary of the Invention

[0005] The purpose of the present invention is to provide a rapid die-casting device for aluminum alloy die-castings to solve the problem that volume shrinkage occurs at the thicker positions during the solidification process of aluminum alloy as mentioned in the above background technique. If there is not enough molten metal to supplement, it will lead to shrinkage cavities or shrinkage porosity in the aluminum alloy solution at the thicker positions during solidification shrinkage.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] A rapid die-casting device for aluminum alloy die-castings, comprising a die-casting table, fixed tables and a fixed die table fixedly installed on both sides above the die-casting table, and a movable die table movably arranged on the die-casting table between the fixed table and the fixed die table. A movable die and a fixed die are fixedly installed on one side of the movable die table and the fixed die table respectively. A die-casting pipe is fixedly and penetratingly connected to one side of the fixed die table. A die-casting rod is fitted and movably installed inside the die-casting pipe. A hydraulic cavity is provided inside the die-casting rod. Through holes communicating with the hydraulic cavity are provided on one side and the outside of the die-casting rod. At least one shrinkage compensation groove is provided on the other side inside the die-casting rod, and the shrinkage compensation grooves communicate with the hydraulic cavity. A shrinkage compensation pressure rod is fitted and movably installed inside the die-casting rod. A shrinkage compensation head is provided on the other side of the shrinkage compensation pressure rod, and the shrinkage compensation head is fitted and movably installed on the other side inside the die-casting rod. At least one telescopic rod is fixedly installed at equal intervals on one side of the shrinkage compensation head, and the telescopic rods are all fitted and movably installed inside the shrinkage compensation grooves. A support table is fixedly installed on one side of the fixed die table. A pump one is fixedly installed on one side of the support table. The die-casting pipe penetrates through the inside of the support table and is connected to the pump one in a communicating manner. A pump two is provided below the middle of the die-casting table. A three-way pipe is nested and fixedly installed on one side of the pump two. A connecting pipe two is connected to one side of the three-way pipe in a communicating manner, and the connecting pipe two is connected to the die-casting pipe in a communicating manner.

[0008] In the above solution, preferably: A material guiding joint is fixedly installed on one side of the die-casting pipe. A driving plate is fixedly installed at the bottom of the material guiding joint. Two symmetrical connecting rods are fitted and movably installed on one side of the driving plate. A driving gear is provided inside the driving plate and is meshed with one of the connecting rods. A connecting plate is fixedly installed on one side of the connecting rod. A positioning sleeve plate is fixedly installed on one side of the connecting plate.

[0009] In the above solution, preferably: A material guiding pipe is connected to the upper part of the material guiding joint in a penetrating manner. A feeding port is provided above one side of the die-casting pipe and below the material guiding pipe. The connecting plate is arranged between the feeding port and the material guiding pipe. A positioning sleeve plate paired with the feeding port is fixedly installed on one side of the connecting plate. A heating table for heating is provided on the back of the die-casting table. A melting furnace is fixedly installed above the heating table. The material guiding pipe penetrates through the middle position of the melting furnace.

[0010] In the above solution, preferably: Fixing rods are fixedly installed at the four corners of the fixed table and the fixed die table, and the fixing rods penetrate through the four corners of the movable die table. A driving machine is fixedly installed on one side of the fixed table. An electric push rod in transmission connection with the driving machine is fitted and installed in the middle of the fixed table, and one side of the electric push rod is fixedly connected to the movable die table.

[0011] In the above solution, preferably: The other side of the pump two is connected to a water cooler below the die-casting table in a communicating manner. A connecting pipe one is connected between the water cooler and the pump one in a communicating manner.

[0012] In the above solution, preferably: one side of the water chiller is connected through a heat exchange pipe one for conveying cooling water, and the heat exchange pipe one is installed through the upper part of the moving die and the fixed die. The lower parts of the moving die and the fixed die are both connected through a heat exchange pipe two, and the heat exchange pipe two is connected through a three-way pipe.

[0013] In the above solution, preferably: a solvent-based release agent that can be used as an ultrasonic coupling agent is sprayed inside the moving die and the fixed die, and ultrasonic probes are installed inside both the moving die and the fixed die. Channels for the circulation of cooling water are provided inside the moving die and the fixed die, and the heat exchange pipe one and the heat exchange pipe two are connected through the channels for the circulation of cooling water. At least one air hole is provided inside both the moving die and the fixed die, and an air extraction mechanism that is fitted and fixedly installed in the air hole and is connected through the channel is provided.

[0014] In the above solution, preferably: the air extraction mechanism includes an air passage partition plate and an airtight head that is fitted and movable inside the air hole. The air passage partition plate has a porous structure, and a hollow air suction pipe is fixedly installed above the air passage partition plate. A spring member is provided outside the air suction pipe, and both ends of the spring member are fixedly connected to the air passage partition plate and the airtight head respectively.

[0015] In the above solution, preferably: through holes are provided on the outer sides of the material guiding joint, the die casting pipe, and the die casting rod, and the connecting pipe two passes through the through hole on the material guiding joint and is fitted and fixedly installed inside the through hole on the die casting pipe. The through hole on the outer side of the die casting rod is connected through the through hole on the die casting pipe to the connecting pipe two.

[0016] The present invention provides a rapid die casting device for aluminum alloy die castings, having the following technical key points and beneficial effects:

[0017] 1. By designing structures such as a feeding rod, a feeding head, and a telescopic rod, after the aluminum alloy solution is injected into the die casting pipe, the pump one is started, and the water pressure is used to push the die casting rod and the feeding rod to move synchronously, and the aluminum alloy solution is pressed into the mold cavity. At the same time, the cooling water enters the hydraulic cavity and the telescopic groove through the through hole of the die casting rod, and the telescopic rod is pushed to make the feeding head extend. When the die casting rod fits with the fixed die, the feeding rod injects the aluminum alloy solution required for feeding into the thicker position of the mold cavity under the action of water pressure. During normal feeding, the pump two quantitatively sucks out the cooling water through the connecting pipe two, and the pump one operates at a constant speed to push the feeding rod to move at a constant speed to achieve uniform feeding. If shrinkage holes or shrinkage porosity are detected, the pump two reduces the operating rate and increases the feeding pressure to prevent shrinkage holes or shrinkage porosity from being formed due to volume shrinkage when the aluminum alloy solution cools and solidifies, improving the density of the casting and thus improving the quality of the casting.

[0018] 2. By designing structures such as an airtight head, an air suction pipe, and a spring member, after the moving die and the stationary die are closed, the second pump operates to generate suction, creating a negative pressure in the channels of the moving die and the stationary die. At this time, the gas generates suction on the airtight head through the air passage partition and the air suction pipe, causing the airtight head to compress the spring member and contract inward until it fits against the air suction pipe, opening the air hole. The second pump can then suck the air in the mold cavity. When the air in the mold cavity is pumped to a vacuum state, the second pump stops operating, and the airtight head blocks the air hole under the elastic action of the spring member. This process effectively avoids airtight blockage in smaller cavities due to the inability to discharge gas when injecting aluminum alloy solution, ensuring the smooth filling of the aluminum alloy solution and improving the structural integrity and quality of the casting.

[0019] 3. By designing structures such as a material guiding joint, an opening and closing plate, and a connecting rod, by driving the rotation of the driving gear in the driving plate, the driving gear meshes with one of the connecting rods, causing the connecting rod to perform a circular motion around the center point of the material guiding joint, and the connecting rod retracts into the driving plate. At this time, the opening and closing plate cancels the blockage of the material guiding pipe and the feeding port, and at the same time, the positioning sleeve plate is located between the material guiding pipe and the feeding port to surround the feeding port, enabling the middle-section aluminum alloy solution in the material guiding pipe to flow into the die casting pipe for filling, thus facilitating the use of aluminum alloy solution for charging the die casting pipe.

[0020] 4. By designing structures such as a material guiding pipe, a heating table, and a melting furnace, the operator places the required aluminum alloy raw materials in the melting furnace. Through the operation of the heating table, the heating equipment inside generates heat energy to heat the melting furnace. As the temperature rises, the aluminum alloy raw materials in the melting furnace gradually melt into a liquid die casting table. Since the middle-section aluminum alloy solution in the melting furnace has fewer impurities and is connected to the material guiding pipe, the middle-section aluminum alloy solution in the melting furnace is selected for use to reduce the impurities in the aluminum alloy solution and improve the forming quality of the mold. Brief Description of the Drawings

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0022] Figure 2 It is a schematic diagram of the back structure of the die casting table in the present invention.

[0023] Figure 3 It is a schematic diagram of the bottom structure of the moving die table and the stationary die table in the present invention.

[0024] Figure 4 It is a schematic sectional view of the connection structure between the die casting pipe and the stationary die table in the present invention.

[0025] Figure 5 It is a schematic diagram of the connection structure between the first heat exchange pipe and the second heat exchange pipe in the present invention.

[0026] Figure 6This is a schematic diagram of the split structure of the die-casting rod and die-casting tube in the present invention.

[0027] Figure 7 This is a schematic diagram of the split structure of the drive plate and the material guiding joint in the present invention.

[0028] Figure 8 This is a schematic cross-sectional view of a partial structure of the die-casting tube in the present invention.

[0029] Figure 9 For the present invention Figure 5 A schematic enlarged view of the partial structure at A in the present invention.

[0030] Figure 10 This is a schematic plan view of the air extraction mechanism in the present invention.

[0031] In the figure: 1. Die-casting table; 2. Fixed table; 3. Moving die table; 4. Fixed die table; 401. Support table; 5. Fixed rod; 6. Driving machine; 601. Electric push rod; 7. Heating table; 8. Melting furnace; 801. Material guiding pipe; 802. Material guiding joint; 803. Opening and closing plate; 804. Connecting rod; 805. Driving plate; 806. Alignment sleeve plate; 9. Pump 1; 10. Connecting pipe 1; 11. Moving die; 12. Fixed die; 13. Die-casting tube; 1301. Die-casting rod; 13011. Hydraulic cavity; 13012. Telescopic groove; 1302. Compensating pressure rod; 1303. Compensating head; 13031. Telescopic rod; 1304. Feed inlet; 14. Water cooler; 1401. Heat exchange pipe 1; 1402. Heat exchange pipe 2; 15. Connecting pipe 2; 16. Three-way pipe; 17. Pump 2; 18. Air extraction mechanism; 1801. Air passage partition; 1802. Air suction pipe; 1803. Spring part; 1804. Airtight head; 19. Through hole. Detailed implementation manners

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0033] Please refer to Figures 1 to 10 , the present invention provides a technical solution for a rapid die-casting device for aluminum alloy die-castings:

[0034] A rapid die-casting device for aluminum alloy die-castings, comprising a die-casting table 1, fixed tables 2 and a fixed die table 4 fixedly installed on both sides above the die-casting table 1, and a movable die table 3 movably arranged on the die-casting table 1 between the fixed tables 2 and the fixed die table 4. Movable dies 11 and fixed dies 12 are fixedly installed on one side of the movable die table 3 and the fixed die table 4 respectively. A die-casting pipe 13 is fixedly and penetratingly connected to one side of the fixed die table 4. A die-casting rod 1301 is fitted and movably installed inside the die-casting pipe 13, and a hydraulic cavity 13011 is provided inside the die-casting rod 1301. Through holes 19 are provided on one side and the outside of the die-casting rod 1301 and are all connected to the hydraulic cavity 13011 in a penetrating manner. At least one shrinkage compensation groove 13012 is provided on the other side inside the die-casting rod 1301, and the shrinkage compensation grooves 13012 are all connected to the hydraulic cavity 13011 in a penetrating manner. A shrinkage compensation pressure rod 1302 is fitted and movably installed inside the die-casting rod 1301. A shrinkage compensation head 1303 is provided on the other side of the shrinkage compensation pressure rod 1302, and the shrinkage compensation head 1303 is fitted and movably installed on the other side inside the die-casting rod 1301. At least one telescopic rod 13031 is fixedly installed at equal intervals on one side of the shrinkage compensation head 1303, and the telescopic rods 13031 are all fitted and movably installed inside the shrinkage compensation grooves 13012. A support table 401 is fixedly installed on one side of the fixed die table 4. A first pump 9 is fixedly installed on one side of the support table 401, and the die-casting pipe 13 passes through and is connected to the first pump 9 in a penetrating manner inside the support table 401. A second pump 17 is provided below the middle of the die-casting table 1, and a three-way pipe 16 is nested and fixedly installed on one side of the second pump 17. A second connecting pipe 15 is connected to one side of the three-way pipe 16 in a penetrating manner, and the second connecting pipe 15 is connected to the die-casting pipe 13 in a penetrating manner;

[0035] As an embodiment of the present invention, as Figures 1 to 8 shown, a solvent-based release agent that can be used as an ultrasonic coupling agent is sprayed inside the movable die 11 and the fixed die 12, and ultrasonic probes are installed inside both the movable die 11 and the fixed die 12. Through holes 19 are provided on the outside of the material guiding joint 802, the die-casting pipe 13 and the die-casting rod 1301, and the second connecting pipe 15 passes through and is fixedly installed in the through hole 19 on the die-casting pipe 13 where the material guiding joint 802 is fitted. The through hole 19 on the outside of the die-casting rod 1301 is connected to the second connecting pipe 15 through the through hole 19 on the die-casting pipe 13;

[0036] During operation, after the aluminum alloy solution is filled into the die casting pipe 13, the end face on one side of the initial position of the feeding rod 1302 in the die casting rod 1301 remains flush. By starting the first pump 9, the cooling water after heat exchange at the end of the near heat exchange pipe two 1402 in the water cooler 14 is transported from the first connecting pipe 10 into the die casting pipe 13. When the frictional force between the die casting pipe 13 and the die casting rod 1301 is greater than the frictional force between the die casting rod 1301 and the feeding rod 1302, under the water pressure generated by the first pump 9 filling the cooling water into the die casting pipe 13, the die casting rod 1301 and the feeding rod 1302 are pushed to move synchronously towards the fixed die 12. At this time, the aluminum alloy solution filled in the die casting pipe 13 is pressed into the mold cavity formed by the moving die 11 and the fixed die 12 under the movement of the die casting rod 1301. And the feeding head 1303 enters the telescopic groove 13012 through the through hole 19 on one side of the die casting rod 1301 and the hydraulic cavity 13011 by the cooling water, so as to push the telescopic rod 13031, making the feeding head 1303 extend out of the end face on the other side of the die casting rod 1301. When the end face on the other side of the die casting rod 1301 fits with the fixed die 12, the feeding head 1303 penetrates through the fixed die 12 to the middle of the thicker position in the mold cavity. Since the end face on the other side of the die casting rod 1301 is limited and stops moving after fitting with the fixed die 12, at this time, the water pressure generated by the operation of the first pump 9 acts on one side of the feeding rod 1302, and then pushes the feeding rod 1302 to move in the die casting rod 1301, so as to inject the aluminum alloy solution required for feeding in the feeding head 1303 and the die casting rod 1301 on the other side of the feeding rod 1302 into the thicker position of the mold cavity;

[0037] After the die casting table 1 on the other side end face of the die casting rod 1301 fits with the fixed die 12 to fill the mold cavity with the aluminum alloy solution by die casting, at this time the second pump 17 starts to operate, so that the cooled cooling water in the water cooler 14 circulates in the channels in the moving die 11 and the fixed die 12 through the heat exchange pipe one 1401 and the heat exchange pipe two 1402, and then the aluminum alloy solution in the mold cavity is gradually cooled and formed. The ultrasonic probes in the moving die 11 and the fixed die 12 cooperate with the ultrasonic detector to detect the gradually cooled and formed aluminum alloy model in real time. When the aluminum alloy model is gradually cooled and formed, its outer side to the inner side is distributed with solid, solid-liquid coexistence and aluminum alloy solution. Under the ultrasonic detector, the signal characteristics of its solid state region are: the waveform baseline is stable and the bottom wave is clearly visible. If there are shrinkage porosity or shrinkage cavity conditions inside, the signal characteristics of the defect are that the echo shows multi-peak superposition signal echo and high-amplitude single-peak narrow pulse echo; the signal characteristics of the solid-liquid coexistence region under the acoustic impedance difference formed at the interface between the primary grains and the liquid phase are: the ultrasonic waves are reflected and scattered at the grain boundaries, and the waveform shows a multi-peak superposition characteristic; the signal characteristics of the liquid region are that the atoms in the liquid aluminum alloy are arranged disorderly, and when the ultrasonic waves propagate, the energy decays rapidly due to thermal motion and viscous resistance, and the sound velocity is relatively low, and the signal characteristics are: low-amplitude, wide-frequency clutter;

[0038] Under normal feeding operation conditions, the feeding pressure rod 1302 is pushed to move inside the die-casting rod 1301 by hydraulic pressure, so that the aluminum alloy solution required for feeding inside the feeding head 1303 and inside the die-casting rod 1301 on the other side of the feeding pressure rod 1302 is injected into the thicker position of the mold cavity. At this time, the second pump 17 is communicated with the through hole 19 outside the die-casting rod 1301 through the second connecting pipe 15 to quantitatively suck out the cooling water injected into the hydraulic cavity 13011 and the telescopic groove 13012 on one side of the die-casting rod 1301. At the same time, under the uniform operation of the first pump 9, the cooling water is quantitatively discharged under the action of hydraulic pressure through the through holes 19 arranged on one side and the outside of the die-casting rod 1301. Since the first pump 9 operates uniformly, the feeding pressure rod 1302 is pushed to move uniformly, so as to uniformly push the aluminum alloy solution required for feeding inside the feeding head 1303 and inside the die-casting rod 1301 on the other side of the feeding pressure rod 1302 into the thicker position of the mold cavity. At this time, when the mold cavity is filled with the aluminum alloy solution, the hydraulic pressure of the feeding aluminum alloy solution on the other side of the feeding head 1303 is used to push the feeding head 1303 to contract into the die-casting rod 1301, and the telescopic rods 13031 on one side of the feeding head 1303 quantitatively discharge the cooling water in the telescopic groove 13012. Then, normal feeding is realized through the quantitative discharge of the three of them;

[0039] If there are shrinkage cavities or porosity in the aluminum alloy solution during the gradual cooling and forming process, the echo signals of the shrinkage cavities or porosity in the solid region are detected as multi-peak superposition signals or high-amplitude single-peak signals. At this time, the ultrasonic detector transmits the signals to the second pump 17, and the signal is processed and intervened by the processing unit of the second pump 17, so that the processing unit transmits the signal for reducing the operating rate of the second pump 17 to the control unit therein. At this time, the cooling water is quantitatively discharged under the action of hydraulic pressure through the through holes 19 arranged on one side and the outside of the die-casting rod 1301, and the flow rate discharged through the other two is reduced. The hydraulic pressure of the cooling water in the telescopic groove 13012 increases the pressure acting on the telescopic rod 13031, and at the same time, the pressure acting on one end face of the feeding pressure rod 1302 increases. Furthermore, the hydraulic pressure of the feeding aluminum alloy solution on the other side of the feeding head 1303 and the hydraulic pressure of the gradually formed solution in the mold cavity are increased. When the operating rate of the second pump 17 is reduced, the cooling and forming efficiency of the model in the mold cavity is reduced. When the aluminum alloy solution fed under high pressure detects the echo signal of shrinkage cavity or porosity by ultrasonic wave, it is instantaneously pressurized and supplemented by the feeding pressure rod 1302, thereby preventing the formation of shrinkage cavities or porosity due to volume shrinkage when the aluminum alloy solution gradually forms.

[0040] As an embodiment of the present invention, such as Figures 2 to 10As shown, a material guide joint 802 is fixedly installed on one side of the die casting tube 13, and a driving plate 805 is fixedly installed on the bottom of the material guide joint 802. Two symmetrical connecting rods 804 are movably installed on one side of the driving plate 805, and a driving gear is provided inside the driving plate 805 to mesh with one of the connecting rods 804. An opening and closing plate 803 is fixedly installed on one side of the connecting rod 804, and an alignment sleeve plate 806 is fixedly installed on one side of the opening and closing plate 803. A material guide pipe 801 is connected through the die casting table 1, a feed port 1304 located below the material guide pipe 801 is provided on one side of the die casting tube 13, and an opening and closing plate 803 is arranged between the feed port 1304 and the material guide pipe 801, and a positioning sleeve plate 806 matched with the feed port 1304 is fixedly installed on one side of the opening and closing plate 803, a heating table 7 for heating is provided on the back of the die casting table 1, a furnace 8 is fixedly installed above the heating table 7, and the material guide pipe 801 is installed through the middle position of the furnace 8;

[0041] During operation, the staff places the required aluminum alloy raw materials in the furnace 8, and through the operation of the heating table 7, the heating equipment inside it generates heat energy to heat the furnace 8. As the temperature rises, the aluminum alloy raw materials in the furnace 8 gradually melt into a liquid die-casting table 1. Since the aluminum alloy solution in the middle section of the furnace 8 has fewer impurities, it is connected with the guide pipe 801, and then the aluminum alloy solution in the middle section of the furnace 8 is selected for use. When the mold cavity is in a vacuum negative pressure state and the aluminum alloy solution is ready, the driving gear in the driving plate 805 is driven to rotate, and the driving gear is meshed with one of the connecting rods 804, so that the connecting rod 804 revolves around the guide pipe. The center point of the joint 802 moves in a circle, so that the connecting rod 804 is retracted into the driving plate 805. At this time, the opening and closing plate 803 cancels the blockage of the guide tube 801 and the feed port 1304. At the same time, the positioning sleeve 806 is located between the guide tube 801 and the feed port 1304 to enclose the feed port 1304, so that the middle section of the aluminum alloy solution in the guide tube 801 is filled and flows into the die-casting tube 13. When the aluminum alloy solution is filled into the die-casting tube 13, the driving gear operates in the reverse direction, so that the opening and closing plate 803 re-seals the guide tube 801 and the feed port 1304, so that the die-casting tube 13 can be filled with the aluminum alloy solution.

[0042] As an embodiment of the present invention, Figures 1 to 3 As shown, the four corners of the fixed table 2 and the fixed die table 4 are fixedly installed with fixed rods 5, and the fixed rods 5 are arranged through the four corners of the movable die table 3, a driving machine 6 is fixedly installed on one side of the fixed table 2, and an electric push rod 601 connected to the driving machine 6 is embedded in the middle of the fixed table 2, and one side of the electric push rod 601 is fixedly connected to the movable die table 3;

[0043] During operation, the drive motor 6 is powered on and starts. The motor inside it outputs power, and through the transmission device, the electric push rod 601 starts to work. The electric push rod 601 converts the rotational motion of the drive motor 6 into linear motion, pushing the moving die table 3 away from the fixed die table 4 along the direction of the fixed rod 5. When the moving die table 3 moves, the fixed rod 5 guides and supports the moving die table 3 to ensure its stability during movement. Furthermore, the moving die 11 and the fixed die 12 on the moving die table 3 and the fixed die table 4 are brought into contact and sealed for mold closing. The moving die 11 and the fixed die 12 form a cavity for injecting and filling aluminum alloy solution after mold closing. When the casting solidifies, the drive motor 6 drives the electric push rod 601 to retract, driving the moving die table 3 to separate from the fixed die table 4. At this time, the operator uses the clamping device to clamp the formed mold out of the moving die 11 and the fixed die 12, thus realizing the mold removal process.

[0044] As an embodiment of the present invention, as Figures 1 to 5 shown, on the other side of the second pump 17, there is a water cooler 14 connected through penetration and located below the die casting table 1. There is a first connecting pipe 10 connected through penetration between the water cooler 14 and the first pump 9. On one side of the water cooler 14, there is a first heat exchange pipe 1401 for transporting cooling water, and the first heat exchange pipe 1401 is installed through penetration above the moving die 11 and the fixed die 12. Below the moving die 11 and the fixed die 12, there are second heat exchange pipes 1402 connected through penetration, and the second heat exchange pipes 1402 are both connected to the three-way pipe 16 through penetration. Inside the moving die 11 and the fixed die 12, there are channels for the circulation of cooling water, and the first heat exchange pipe 1401 and the second heat exchange pipes 1402 are connected through penetration by the channels for the circulation of cooling water;

[0045] During operation, after the aluminum alloy solution is injected into the cavity formed by the moving die 11 and the fixed die 12, the operation of the second pump 17 generates suction on one side of the three-way pipe 16. At the same time, the valve between the first heat exchange pipe 1401 and the water cooler 14 is electrically controlled to open. At this time, the cooling water in the water cooler 14 realizes negative pressure circulating flow through the first heat exchange pipe 1401, the channels in the moving die 11 and the fixed die 12, and the second heat exchange pipes 1402. The cooling water circulates in the channels in the moving die 11 and the fixed die 12 and exchanges heat with the aluminum alloy solution, and then flows back into the water cooler 14. Through the cooling and heat dissipation device in the water cooler 14, the heat-exchanged water is cooled down. Through the sequential circulation of the cooling water, the mold in the cavity gradually solidifies and forms.

[0046] As an embodiment of the present invention, as Figure 9 and Figure 10As shown, at least one air hole is provided inside both the moving die 11 and the fixed die 12, and an air extraction mechanism 18 that is in through connection with the channel is fixedly installed by fitting inside the air hole. The air extraction mechanism 18 includes an air passage partition plate 1801 and an airtight head 1804 that is fitted and movable inside the air hole. The air passage partition plate 1801 has a porous structure, and an air suction pipe 1802 that is hollow inside is fixedly installed above the air passage partition plate 1801. A spring member 1803 is provided outside the air suction pipe 1802, and both ends of the spring member 1803 are fixedly connected to the air passage partition plate 1801 and the airtight head 1804 respectively;

[0047] During operation, when the moving die 11 and the fixed die 12 are closed, the valve between the water cooler 14 and the first heat exchange pipe 1401 remains closed. At this time, under the suction of the second pump 17, the cooling water in the channels of the moving die 11 and the fixed die 12 is sucked out through the three-way pipe 16 and the second heat exchange pipe 1402, generating a negative pressure. Since the through holes 19 on the outer side of the die casting rod 1301 and the through holes 19 on the die casting pipe 13 are not aligned at this time, the liquid in the hydraulic cavity 13011 will not be affected through the second connecting pipe 15 under the suction of the second pump 17. When a negative pressure is generated in the channel, since the air extraction mechanism 18 in the air hole is in through connection with the channel, the gas generates a suction force on the airtight head 1804 through the air passage partition plate 1801 and the air suction pipe 1802, causing the airtight head 1804 to contract inward from the air hole and compress the spring member 1803. When the airtight head 1804 contracts inward from the air hole to fit with the air suction pipe 1802, under the continuous suction force and the fit with the airtight head 1804, the air pressure inside the air suction pipe 1802 is less than the air pressure outside, further causing the airtight head 1804 to continuously fit with the air suction pipe 1802, keeping the air hole open. Thus, the suction force generated by the second pump 17 sucks the air in the mold cavity. The extracted gas is sent into the water cooler 14 through the second pump 17 and discharged through the opening on the water cooler 14. When the air in the mold cavity is sucked to a vacuum, the second pump 17 stops operating, and the air pressure in the channels of the moving die 11 and the fixed die 12 returns to balance. At this time, the airtight head 1804 plugs the air hole under the elastic action of the spring member 1803, thereby preventing the aluminum alloy solution from forming an airtight blockage in the smaller cavities when injected into the mold cavity, and avoiding the gas in the smaller cavities being unable to be discharged to form an airtight blockage and reducing the structural integrity of the aluminum alloy die casting.

[0048] Working principle: After the drive machine 6 is powered on and started, the internal motor of it will generate power output. This power is transmitted through the transmission device, and then drives the electric push rod 601 to start operating. The function of the electric push rod 601 is to convert the rotational motion of the drive machine 6 into a linear motion, and push the moving die table 3 to move along the direction of the fixed rod 5, so as to move away from the fixed die table 4. During the movement of the moving die table 3, the fixed rod 5 provides guiding support to ensure the stability of the movement of the moving die table 3. In this way, the moving die 11 and the fixed die 12 on the moving die table 3 and the fixed die table 4 are closely attached and sealed for the mold closing operation. After the mold closing is completed, the moving die 11 and the fixed die 12 jointly form a mold cavity for injecting and filling aluminum alloy solution;

[0049] After the moving die 11 and the fixed die 12 are closed, the valve between the water cooler 14 and the first heat exchange pipe 1401 remains closed. At this time, with the suction of the second pump 17, through the three-way pipe 16 and the second heat exchange pipe 1402, the cooling water in the channels of the moving die 11 and the fixed die 12 is pumped out, so as to form a negative pressure in the channels. When the negative pressure is formed, the gas exerts a suction force on the airtight head 1804 through the air passage partition 1801 and the air suction pipe 1802, causing the airtight head 1804 to contract inward and compress the spring member 1803. When the airtight head 1804 contracts to fit tightly with the air suction pipe 1802, the air pressure inside the air suction pipe 1802 is lower than the external air pressure, so that the airtight head 1804 continuously keeps tightly fitting with the air suction pipe 1802, thus keeping the air hole in an open state. In this way, the suction force generated by the second pump 17 can effectively suck the air in the mold cavity. The sucked gas is then sent into the water cooler 14 and discharged through the opening on it. When the air in the mold cavity is completely sucked to the vacuum state, the second pump 17 stops working, and the air pressure in the channels of the moving die 11 and the fixed die 12 returns to balance. At this time, the airtight head 1804 plugs the air hole under the elastic action of the spring member 1803, effectively preventing the aluminum alloy solution from forming an airtight blockage when injecting into the smaller cavities in the mold cavity, avoiding the airtight blockage problem caused by the inability of the gas to be discharged, and thus ensuring the structural integrity of the aluminum alloy die casting;

[0050] Under the operation of the heating stage 7, the heating device inside it generates heat energy to heat the melting furnace 8. As the temperature gradually rises, the aluminum alloy raw material in the melting furnace 8 begins to melt into a liquid state. Through the connection of the material guiding pipe 801, the aluminum alloy solution in the melting furnace 8 can be selected for use. When a vacuum negative pressure state is formed in the mold cavity and the aluminum alloy solution is ready, the driving gear in the driving plate 805 starts to rotate. The driving gear meshes with the connecting rod 804, causing the connecting rod 804 to perform a circular motion around the center point of the material guiding joint 802, and then driving the connecting rod 804 to retract into the driving plate 805. At this time, the opening and closing plate 803 cancels the blockage of the material guiding pipe 801 and the feeding port 1304. At the same time, the positioning sleeve plate 806 is located between the material guiding pipe 801 and the feeding port 1304 to surround the feeding port 1304. In this way, the aluminum alloy solution in the material guiding pipe 801 can smoothly fill and flow into the die casting pipe 13. When the aluminum alloy solution is completely filled into the die casting pipe 13, through the reverse operation of the driving gear, the opening and closing plate 803 seals the material guiding pipe 801 and the feeding port 1304 again, thus completing the filling process of the aluminum alloy solution in the die casting pipe 13;

[0051] When the aluminum alloy solution is injected into the mold cavity composed of the moving mold 11 and the fixed mold 12, the second pump 17 is started to apply suction to the three-way pipe 16 on one side. At the same time, the valve between the first heat exchange pipe 1401 and the water cooler 14 is opened. At this time, the cooling water in the water cooler 14 circulates in a negative pressure through the first heat exchange pipe 1401, the channels in the moving mold 11 and the fixed mold 12, and the second heat exchange pipe 1402. The cooling water circulates in the channels in the moving mold 11 and the fixed mold 12 and exchanges heat with the aluminum alloy solution, and then flows back to the water cooler 14. Through the cooling and heat dissipation device in the water cooler 14, the heat-exchanged water is cooled down. Through the continuous circulation of the cooling water, the mold in the mold cavity gradually solidifies and forms;

[0052] After the aluminum alloy solution is injected into the die casting pipe 13, one end face on the side of the initial position of the feeding pressure rod 1302 is flush with the die casting rod 1301. After starting the first pump 9, the cooling water in the water cooler 14, after heat exchange at the end of the near heat exchange pipe two 1402, is transported to the die casting pipe 13 through the first connecting pipe 10. Since the frictional force between the die casting pipe 13 and the die casting rod 1301 is greater than the frictional force between the die casting rod 1301 and the feeding pressure rod 1302, the water pressure generated by the first pump 9 transporting the cooling water to the die casting pipe 13 pushes the die casting rod 1301 and the feeding pressure rod 1302 to move synchronously towards the fixed die 12. At this time, the aluminum alloy solution filled in the die casting pipe 13 is pressed into the mold cavity formed by the moving die 11 and the fixed die 12 under the movement of the die casting rod 1301. The feeding head 1303 enters the telescopic groove 13012 through the through hole 19 on one side of the die casting rod 1301 and the hydraulic cavity 13011, and pushes the telescopic rod 13031, causing the feeding head 1303 to extend out of the other end face of the die casting rod 1301. When the other end face of the die casting rod 1301 is in close contact with the fixed die 12, the feeding head 1303 penetrates the fixed die 12 and is located at the center of the thicker position in the mold cavity. At this time, the water pressure generated by the first pump 9 acts on one side of the feeding pressure rod 1302, pushing the feeding pressure rod 1302 to move within the die casting rod 1301, and injecting the aluminum alloy solution required in the feeding head 1303 and in the die casting rod 1301 on the other side of the feeding pressure rod 1302 into the thicker position of the mold cavity;

[0053] During the standard feeding operation, the water pressure drives the feeding pressure rod 1302 to move within the die casting rod 1301, injecting the aluminum alloy solution required in the feeding head 1303 and in the die casting rod 1301 on the other side of the feeding pressure rod 1302 into the thicker part of the mold cavity. At the same time, the second pump 17 is connected to the through hole 19 on the outside of the die casting rod 1301 through the second connecting pipe 15 to quantitatively suck out the cooling water in the hydraulic cavity 13011 and the telescopic groove 13012; under the stable operation of the first pump 9, the cooling water passes through the through holes 19 on one side and the outside of the die casting rod 1301, and is quantitatively discharged under the hydraulic action, thereby pushing the feeding pressure rod 1302 to move at a stable speed, ensuring that the aluminum alloy solution required in the feeding head 1303 and in the die casting rod 1301 on the other side of the feeding pressure rod 1302 is evenly injected into the thicker part of the mold cavity. At this time, the mold cavity is filled with the aluminum alloy solution, and the fed aluminum alloy solution generates a hydraulic pressure on the other side of the feeding head 1303, pushing the feeding head 1303 to contract into the die casting rod 1301. The telescopic rod 13031 on one side of the feeding head 1303 quantitatively discharges the cooling water in the telescopic groove 13012, and a normal feeding process is achieved through the quantitative discharges of the three;

[0054] If shrinkage cavities or porosity occur during the gradual cooling and forming process of the aluminum alloy solution, the echo signals of the shrinkage cavities or porosity in the solid region are manifested as multi-peak superimposed signals or high-amplitude single-peak signals. At this time, the ultrasonic detector transmits the signals to the second pump 17. The processing unit of the second pump 17 processes and intervenes in the signals, reduces the operating rate of the second pump 17, and transmits the signals to the control unit. At this time, the cooling water is quantitatively discharged under hydraulic pressure through the through holes 19 on one side and the outside of the die-casting rod 1301. The flow rate discharged through the other two is reduced, the hydraulic pressure of the cooling water in the telescopic groove 13012 acting on the telescopic rod 13031 increases, and at the same time, the pressure acting on one end face of the feeding pressure rod 1302 increases, thereby increasing the hydraulic pressure of the feeding aluminum alloy solution on the other side of the feeding head 1303 and the hydraulic pressure of the gradually formed solution in the mold cavity. When the operating rate of the second pump 17 decreases, the cooling and forming efficiency of the model in the mold cavity decreases. When the aluminum alloy solution fed under high pressure detects the echo signal of shrinkage cavities or porosity by ultrasonic waves, it is instantaneously pressurized and supplemented by the feeding pressure rod 1302, thereby preventing shrinkage cavities or porosity from being formed due to volume shrinkage when the aluminum alloy solution is gradually formed;

[0055] After the casting solidifies, the drive 6 drives the electric push rod 601 to retract, driving the moving mold table 3 to separate from the fixed mold table 4. At this time, the staff uses the clamping device to clamp the forming mold out of the moving mold 11 and the fixed mold 12, completing the mold removal process.

[0056] It should be noted that the material guide pipe 801, the die-casting pipe 13, the die-casting rod 1301, the feeding pressure rod 1302, and the feeding head 1303 are all metal materials with poor thermal conductivity. The ultrasonic probes in the moving mold 11 and the fixed mold 12 are all accessories on the ultrasonic detector, and the model of the ultrasonic detector can be TUK-950.

[0057] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A rapid die-casting device for aluminum alloy die-casting parts, comprising a die-casting table (1), a fixed table (2) and a fixed die table (4) fixedly mounted on both sides above the die-casting table (1), and a movable die table (3) movably arranged on the die-casting table (1) between the fixed table (2) and the fixed die table (4), wherein a movable die (11) and a fixed die (12) are fixedly mounted on one side of the movable die table (3) and the fixed die table (4), and a die-casting pipe (13) is fixedly connected to one side of the fixed die table (4), characterized in that: The die-casting tube (13) is provided with a die-casting rod (1301) in an movably engaged manner inside the die-casting tube (13), and a hydraulic chamber (13011) is provided inside the die-casting rod (1301). One side and the outer side of the die-casting rod (1301) are provided with through holes (19) that are connected to the hydraulic chamber (13011). The other side of the die-casting rod (1301) is provided with at least one telescopic groove (13012), and the telescopic grooves (13012) are connected to the hydraulic chamber (13011). A shrinkage compensating rod (1302) is provided with an movably engaged manner inside the die-casting rod (1301), and a shrinkage compensating head (1303) is provided on the other side of the die-casting rod (1301). The shrinkage compensating head (1303) is movably engaged with the other side of the die-casting rod (1301). The shrinkage compensation head (1303) is provided with at least one telescopic rod (13031) fixedly installed at an equal distance on one side, and the telescopic rods (13031) are all movably installed in the telescopic groove (13012); a support platform (401) is fixedly installed on one side of the fixed mold platform (4); a pump machine 1 (9) is fixedly installed on one side of the support platform (401); a die-casting pipe (13) is installed through the inside of the support platform (401) and is connected to the pump machine 1 (9); a pump machine 2 (17) is provided at the lower middle of the die-casting platform (1); a three-way pipe (16) is fixedly installed on one side of the pump machine 2 (17); a connecting pipe 2 (15) is connected to one side of the three-way pipe (16); and the connecting pipe 2 (15) is connected to the die-casting pipe (13).

2. The rapid die-casting equipment for aluminum alloy die-casting according to claim 1, characterized in that: A material guide joint (802) is fixedly mounted on one side of the die-cast tube (13), and a driving plate (805) is fixedly mounted on the bottom of the material guide joint (802); two symmetrical connecting rods (804) are movably mounted on one side of the driving plate (805), and a driving gear is provided inside the driving plate (805) and is meshed and connected with one of the connecting rods (804); an opening and closing plate (803) is fixedly mounted on one side of the connecting rod (804), and an alignment sleeve plate (806) is fixedly mounted on one side of the opening and closing plate (803).

3. The rapid die-casting equipment for aluminum alloy die-casting according to claim 2, characterized in that: A material guide pipe (801) is connected to the top of the material guide joint (802), a feed port (1304) located below the material guide pipe (801) is provided on the top of one side of the die casting tube (13), and an opening and closing plate (803) is arranged between the feed port (1304) and the material guide pipe (801), a positioning sleeve plate (806) matched with the feed port (1304) is fixedly installed on one side of the opening and closing plate (803), a heating table (7) for heating is provided on the back of the die casting table (1), a furnace (8) is fixedly installed on the top of the heating table (7), and the material guide pipe (801) is installed through the middle position of the furnace (8).

4. The rapid die-casting equipment for aluminum alloy die-casting according to claim 1, characterized in that: The four corners of the fixed platform (2) and the fixed die platform (4) are fixedly mounted with fixed rods (5), and the fixed rods (5) are arranged to pass through the four corners of the movable die platform (3); a driving machine (6) is fixedly mounted on one side of the fixed platform (2); an electric push rod (601) drivingly connected to the driving machine (6) is embedded in the middle of the fixed platform (2), and one side of the electric push rod (601) is fixedly connected to the movable die platform (3).

5. The rapid die-casting equipment for aluminum alloy die-casting according to claim 1, characterized in that: The other side of the second pump (17) is connected to a water cooler (14) located below the die-casting table (1), and a connecting pipe (10) is connected between the water cooler (14) and the first pump (9).

6. The rapid die-casting equipment for aluminum alloy die-casting according to claim 5, characterized in that: One side of the water cooler (14) is connected to a heat exchange tube 1 (1401) for conveying cooling water, and the heat exchange tube 1 (1401) is installed above the movable mold (11) and the fixed mold (12). The lower parts of the movable mold (11) and the fixed mold (12) are connected to heat exchange tube 2 (1402), and the heat exchange tube 2 (1402) is connected to the three-way pipe (16).

7. The rapid die-casting equipment for aluminum alloy die-casting according to claim 1, characterized in that: The interior of the movable mold (11) and the fixed mold (12) is sprayed with a solvent-type mold release agent that can be used as an ultrasonic coupling agent, and the interior of the movable mold (11) and the fixed mold (12) are both equipped with ultrasonic probes. The interior of the movable mold (11) and the fixed mold (12) is provided with a channel for cooling water circulation, and the heat exchange tube 1 (1401) and the heat exchange tube 2 (1402) are connected through the channel for cooling water circulation. The interior of the movable mold (11) and the fixed mold (12) is provided with at least one air hole, and an exhaust mechanism (18) connected to the channel is fixedly installed in the air hole.

8. The rapid die-casting equipment for aluminum alloy die-casting according to claim 7, characterized in that: The air extraction mechanism (18) comprises an air-venting baffle (1801) and an air-tight head (1804) engaged and movable in the air hole; the air-venting baffle (1801) is a porous structure, and a hollow air suction pipe (1802) is fixedly installed above the air-venting baffle (1801); a spring member (1803) is provided on the outer side of the air suction pipe (1802), and the two ends of the spring member (1803) are respectively fixedly connected to the air-venting baffle (1801) and the air-tight head (1804).

9. The rapid die-casting equipment for aluminum alloy die-casting according to claim 2, characterized in that: The outer sides of the material guide joint (802), the die-cast tube (13) and the die-cast rod (1301) are all provided with through holes (19), and the second connecting tube (15) is arranged to penetrate the material guide joint (802) and be embedded and fixedly installed in the through hole (19) on the die-cast tube (13), and the through hole (19) on the outer side of the die-cast rod (1301) is connected to the second connecting tube (15) through the through hole (19) on the die-cast tube (13).

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