Conjoined low-pressure three-tank furnace

Abstract

The application discloses a connected low-pressure three-tank furnace, and relates to the technical field of casting equipment. The connected low-pressure three-tank furnace comprises a holding chamber for containing and heating aluminum liquid; two pressurizing chambers symmetrically distributed on the two sides of the holding chamber; a liquid-stopping valve mechanism arranged in a separation area between the holding chamber and each pressurizing chamber; a pressurizing assembly corresponding to the pressurizing chamber and used for applying pressure to the aluminum liquid in the pressurizing chamber; and two liquid outlet chambers connected with the corresponding pressurizing chambers respectively and used for delivering the aluminum liquid to a die-casting equipment. In the open state, the liquid-stopping valve mechanism allows the aluminum liquid in the holding chamber to flow into the pressurizing chamber, and in the closed state, the liquid-stopping valve mechanism seals and isolates the holding chamber from the pressurizing chamber, so that the pressurizing chamber can be independently pressurized. The connected low-pressure three-tank furnace solves the technical problem of low production efficiency of the existing holding furnace.

Description

Technical Field

[0001] This invention relates to the field of casting equipment technology, and in particular to an integrated low-pressure three-slot furnace. Background Technology

[0002] Currently, the holding furnaces widely used in low-pressure casting are mostly single-chamber structures or traditional crucible furnaces, which present significant technical bottlenecks. On the one hand, when adding material ("water") or degassing the molten aluminum, the die-casting operation must be paused, making continuous production impossible and severely impacting production efficiency. Especially in the production of high-requirement castings, frequent interruptions in degassing and liquid supply make it difficult to maintain the purity of the molten aluminum. On the other hand, single-chamber structures make it difficult to coordinate the liquid supply of multiple die-casting machines, resulting in low equipment utilization and high procurement costs.

[0003] Therefore, how to provide an integrated low-pressure three-slot furnace to improve production efficiency is a technical problem that needs to be solved by those skilled in the art. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide an integrated low-pressure three-slot furnace, which effectively solves the technical problem of low production efficiency of existing heat preservation furnaces.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A three-cell integrated low-pressure furnace, the three-cell integrated low-pressure furnace comprising: A holding chamber used to contain and heat molten aluminum; Two pressurized chambers are symmetrically distributed on both sides of the holding chamber; A stop valve mechanism is disposed in the partition area between the holding chamber and each of the pressurizing chambers; A pressurizing component is installed on the pressurizing chamber to apply pressure to the molten aluminum inside the pressurizing chamber; Two liquid outlet chambers are respectively connected to the corresponding pressurization chambers and are used to deliver molten aluminum to the die-casting equipment; The stop valve mechanism allows molten aluminum in the holding chamber to flow into the pressurizing chamber when it is open, and seals and isolates the holding chamber from the pressurizing chamber when it is closed, so that the pressurizing chamber can be pressurized independently.

[0006] Preferably, the stop valve mechanism includes: A connector is fixed to the furnace cover of the holding chamber; A liquid stop seat is fixedly installed at the bottom of the furnace chamber of the holding chamber, and its interior is provided with a flow channel communicating with the pressurization chamber; A stop bar is movably inserted into the stop seat and is used to cooperate with the stop seat to open or block the flow channel; A drive assembly, mounted on the connector and connected to the stop bar, is used to drive the stop bar to move up and down in the vertical direction to control the opening and closing of the flow channel.

[0007] Preferably, the driving component includes a lifting cylinder, the driving end of which is connected to the stop bar via a connecting shaft, for driving the stop bar to move up and down.

[0008] Preferably, the drive assembly further includes a rotary cylinder, the output end of which is connected to a rotating component. The rotating component is driven by the connecting shaft and is used to drive the stop bar to rotate around the axis after it descends to the position, so as to achieve a tight seal with the stop seat.

[0009] Preferably, a leveling component is provided between the connector and the furnace cover of the holding chamber.

[0010] Preferably, the pressurization assembly includes a pressurization cover that is sealed and installed on the top of the pressurization chamber, and the pressurization cover is provided with a compressed gas port for introducing compressed gas.

[0011] Preferably, the pressure cover is further provided with a liquid level electrode interface, which is configured with a common electrode, a liquid level upper limit electrode and a liquid level upper limit electrode, wherein the length of the liquid level upper limit electrode is less than the length of the liquid level upper limit electrode.

[0012] Preferably, the holding chamber and the pressurizing chamber are each equipped with an independent heater and an independent temperature control unit.

[0013] Preferably, the cross-sectional area of ​​the two pressurized chambers is smaller than the cross-sectional area of ​​the holding chamber.

[0014] Preferably, the holding chamber is equipped with a degassing rod, and the top of the degassing rod is provided with an inert gas interface. Compared with the above-mentioned background technology, the integrated low-pressure three-slot furnace provided by this application has the following significant advantages over the prior art: Because the holding chamber and the pressurizing chamber are physically isolated, the feeding and degassing operations of the aluminum liquid are carried out independently in the holding chamber, without affecting the supply of liquid to the die-casting equipment from the pressurizing chamber. Even during the feeding or deep degassing process, liquid can still be continuously supplied to one or two die-casting machines, solving the problem of production stoppage caused by process interruption in traditional furnace types and improving production efficiency.

[0015] Maintaining continuous inert gas degassing in the room ensures that the hydrogen content and inclusion levels in the molten aluminum remain at an optimal level.

[0016] Because the cross-sectional area of ​​the pressurizing chamber is smaller than that of the holding chamber, the pressure-exposed area of ​​the molten aluminum during the pressurization process is significantly reduced. On the one hand, the smaller pressure-exposed area reduces the contact area between the molten aluminum and the compressed gas, thereby effectively inhibiting the oxidation of the molten aluminum. On the other hand, to achieve the same liquid lifting height, the volume and amount of compressed gas required are greatly reduced. The reduction in gas consumption not only saves gas source consumption but also reduces the heat carried away by the discharge of a large amount of high-temperature gas, which helps to maintain the stability of the molten aluminum temperature and further ensures the quality of the castings.

[0017] The two pressurization chambers are symmetrically arranged and can alternately, synchronously or on demand supply liquid to multiple die-casting equipment, realizing the "one furnace, multiple machines" configuration and saving equipment procurement and floor space. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0019] Figure 1 This is a front view of a three-slot, low-pressure furnace provided in an embodiment of the present invention. Figure 2 This is a top view of the integrated low-pressure three-slot furnace provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the stop valve mechanism provided in an embodiment of the present invention; Figure 4 This is a top view of the pressure cap structure provided in an embodiment of the present invention; Figure 5 This is a front view of the pressure cap structure provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of the vertical layout of the integrated low-pressure three-slot furnace provided in an embodiment of the present invention; Figure 7 This is a schematic diagram of the inclined layout of the integrated low-pressure three-slot furnace provided in an embodiment of the present invention.

[0020] in: 1-Holding chamber, 2-Pressure chamber, 3-Stop valve mechanism, 4-Discharge chamber, 5-Pressure cover, 6-Compressed gas interface, 7-Liquid level electrode interface, 8-Heater, 9-Degassing rod; 31-Connector, 32-Liquid stop seat, 33-Liquid stop bar, 34-Lifting cylinder, 35-Connecting shaft, 36-Rotating cylinder, 37-Rotating component, 38-Leveling component; 71-Common electrode, 72-Liquid level upper limit electrode, 73-Liquid level upper limit electrode; 91-Inert gas interface. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] Example 1: See Figures 1-5 This application provides an integrated low-pressure three-slot furnace, comprising a furnace body divided into a holding chamber 1 for containing and heating molten aluminum; two pressure chambers 2 symmetrically distributed on both sides of the holding chamber 1 and two outlet chambers 4 connected to the corresponding pressure chambers 2 for conveying molten aluminum to die-casting equipment; a stop valve mechanism 3 disposed in the partition area between the holding chamber 1 and each pressure chamber 2; and a pressure assembly correspondingly installed on the pressure chamber 2 for applying pressure to the molten aluminum in the pressure chamber 2; wherein, the stop valve mechanism 3, in the open state, allows the molten aluminum in the holding chamber 1 to flow into the pressure chamber 2, and in the closed state, seals and isolates the holding chamber 1 from the pressure chamber 2, so that the pressure chamber 2 can be independently pressurized.

[0024] Specifically, this application includes a furnace body with an integral structure, inside which are integrated a holding chamber 1, two pressurizing chambers 2, and two liquid outlet chambers 4. Each pressurizing chamber 2 and its corresponding liquid outlet chamber 4 are designed as a single unit, sharing a sidewall within the furnace body to form a connected, integrated chamber. The two pressurizing chambers 2 and their corresponding liquid outlet chambers 4 are symmetrically arranged on the left and right sides of the holding chamber 1, side-by-side along the horizontal direction.

[0025] The holding chamber 1 is used to contain and continuously heat the molten aluminum, maintaining it in a suitable molten state for casting. Two pressure chambers 2 are symmetrically distributed on the left and right sides of the holding chamber 1, respectively, to receive the molten aluminum from the holding chamber 1 and apply controllable pressure to the molten aluminum inside. Two outlet chambers 4 are respectively connected to the bottom of the corresponding pressure chamber 2, and their outlet ends are connected to the die casting equipment through the liquid riser pipe, which is used to stably transport the pressurized molten aluminum to the die casting machine for forming operations.

[0026] The integrated low-pressure three-tank furnace also includes a liquid stop valve mechanism 3, which is located at the bottom of the partition area between the holding chamber 1 and each pressure chamber 2, and is used to control the flow of molten aluminum from the holding chamber 1 to the pressure chamber 2. At the same time, a pressure assembly is installed on the top of each pressure chamber 2, which is used to introduce compressed gas into the pressure chamber 2, thereby applying pressure to the molten aluminum therein.

[0027] Specifically, the stop valve mechanism 3 has two working states: open and closed. In the open state, the aluminum liquid in the holding chamber 1 can flow into the corresponding pressurizing chamber 2 through the stop valve mechanism 3. In the closed state, the stop valve mechanism 3 completely seals and isolates the holding chamber 1 and the pressurizing chamber 2, so that either pressurizing chamber 2 can independently perform pressurization operation without affecting the process parameters of the aluminum liquid in the holding chamber 1.

[0028] Based on the above embodiments, the stop valve mechanism 3 includes: a connector 31, fixed to the furnace cover of the holding chamber 1; a stop seat 32, fixedly disposed at the bottom of the furnace of the holding chamber 1, with a vertically penetrating flow channel communicating with the pressurization chamber 2 inside; a stop rod 33, movably inserted into the stop seat 32, used to cooperate with the stop seat 32 to open or block the flow channel; and a drive assembly, installed on the connector 31 and connected to the stop rod 33, used to drive the stop rod 33 to rise and fall in the vertical direction to control the opening and closing of the flow channel.

[0029] The connector 31 is fixedly installed on the furnace cover of the holding chamber 1 as a support base for the drive assembly, and is connected to the furnace cover through a heat insulation structure to reduce the impact of high-temperature heat radiation on the drive components.

[0030] The liquid stop seat 32 is fixedly installed at the bottom of the furnace of the holding chamber 1. It is made of high-temperature resistant and aluminum liquid erosion resistant materials such as high-purity corundum or silicon carbide composite material. A flow channel is provided in the interior along the vertical direction. The lower end of the flow channel is connected to the pressure chamber 2 on the corresponding side, and the upper end opens towards the inner cavity of the holding chamber 1, forming the only passage for aluminum liquid to flow from the holding chamber 1 to the pressure chamber 2.

[0031] The liquid stop bar 33 is made of heat-resistant alloy or ceramic material and is movably inserted into the flow channel of the liquid stop seat 32, with its outer diameter matching the inner wall of the flow channel. When the liquid stop bar 33 rises, the flow channel opens, allowing molten aluminum to flow into the pressurization chamber 2; when the liquid stop bar 33 descends and is fully inserted into the liquid stop seat 32, the flow channel is blocked, achieving physical isolation between the holding chamber 1 and the pressurization chamber 2.

[0032] The drive assembly is mounted on the connector 31 and is used to drive the stop bar 33 to move up and down in the vertical direction, thereby controlling the opening and closing of the flow channel.

[0033] Based on the above embodiments, the drive assembly includes a lifting cylinder 34, the drive end of which is connected to the liquid stop bar 33 via a connecting shaft 35, for driving the liquid stop bar 33 to perform lifting and lowering movements.

[0034] Specifically, the lifting cylinder 34 is installed on the connector 31. The driving end of the lifting cylinder 34, such as the piston rod, is fixedly connected to the upper end of the stop rod 33 through the connecting shaft 35. It is used to drive the stop rod 33 to move up and down in the vertical direction, thereby opening or closing the flow channel inside the stop seat 32. The connecting shaft 35 is installed through the connecting seat on the connector 31.

[0035] Specifically, when the lifting cylinder 34 rises, it drives the liquid stop bar 33 to rise through the connecting shaft 35, thereby opening the flow channel and allowing the aluminum liquid to flow from the holding chamber 1 into the pressurizing chamber 2; when the lifting cylinder 34 falls, the liquid stop bar 33 is inserted downward into the liquid stop seat 32 to block the flow channel and complete the isolation.

[0036] To adapt to the high-temperature working environment, the connecting shaft 35 is made of heat-resistant alloy material, and a heat insulation sleeve or water-cooled sealing device is provided at the position where it passes through the furnace cover to prevent the heat inside the furnace from being transferred to the lifting cylinder 34, so as to ensure stable operation.

[0037] Based on the above embodiments, the drive assembly also includes a rotary cylinder 36, the output end of which is connected to a rotary component 37. The rotary component 37 is driven by the connecting shaft 35 and is used to drive the stop bar 33 to rotate around the axis after it is lowered into place, so as to achieve a tight seal with the stop seat 32.

[0038] Specifically, the output end of the rotary cylinder 36 is connected to a rotating component 37, which is in a transmission engagement with the connecting shaft 35. This rotating component 37 transmits the angular displacement output by the rotary cylinder 36 to the connecting shaft 35, thereby driving the stop rod 33 to rotate around its axis. The transmission engagement structure can employ a keyway or spline structure. For example, axial spline teeth can be provided on the outer circumference of the connecting shaft 35, and a matching spline groove can be provided in the inner hole of the rotating component 37. When the two are engaged, the connecting shaft 35 can slide freely axially while transmitting rotational torque, thus accommodating the combined requirements of lifting and rotating motions.

[0039] During operation, the rotary cylinder 36 is activated only after the lifting cylinder 34 has completed its descent stroke and the stop bar 33 has fully inserted into the stop seat 32. The rotary component 37 drives the connecting shaft 35 and the stop bar 33 to rotate by a preset angle, such as 15-45°, so that the lower sealing surface of the stop bar 33 forms a tight seal with the stop seat 32. Because the lifting and rotating actions are performed step-by-step in time, and the transmission structure allows for decoupling of axial sliding and circumferential transmission, the rotary component 37 is in a non-driven follow-up state when the lifting cylinder 34 is working, and will not interfere with its lifting motion.

[0040] The rotational action causes the sealing surface at the lower end of the stop rod 33, such as a conical surface, spherical surface, or plane, to be relatively misaligned and pressed against the corresponding sealing surface inside the stop seat 32, thereby forming a reliable line contact or surface contact seal, effectively preventing the backflow of aluminum liquid or leakage of compressed gas during pressurization.

[0041] Based on the above embodiments, a leveling component 38 is provided between the connector 31 and the furnace cover of the holding chamber 1. Specifically, the leveling component 38 includes at least two adjusting studs, which are fixedly mounted on the upper surface of the furnace cover of the holding chamber 1. A horizontal mounting plate is provided at the bottom of the connector 31, with corresponding through holes on the horizontal mounting plate. The adjusting studs pass through the through holes and are fixed and finely adjusted by two sets of locking nuts or one locking nut in conjunction with an adjusting nut. By tightening the adjusting nuts, the local height of the connector 31 at each stud can be independently adjusted to ensure that the liquid stop bar 33 connected below it remains coaxially aligned with the liquid stop seat 32 at the bottom of the furnace.

[0042] Based on the above embodiments, the pressurization assembly includes a pressurization cover 5 that is sealed and installed on the top of the pressurization chamber 2, and the pressurization cover 5 is provided with a compressed gas interface 6 for introducing compressed gas.

[0043] Specifically, the pressure cover 5 is tightly connected to the furnace opening of the pressure chamber 2 through a high-temperature resistant sealing structure such as a metal spiral wound gasket or a ceramic fiber sealing ring, ensuring that the gas inside the furnace does not leak during the pressurization process and maintaining a stable liquid pressure. The pressure cover 5 is provided with a compressed gas interface 6 for introducing compressed gas. The compressed gas interface 6 is connected to an external gas source pipeline for accurately introducing dry and clean compressed air or inert gas such as nitrogen into the pressure chamber 2 to apply controllable pressure to the aluminum liquid.

[0044] Furthermore, the pressure cap 5 can also be integrated with an exhaust port and a pressure sensor port to facilitate pressure regulation and overpressure relief.

[0045] Based on the above embodiments, the pressure cover 5 is also provided with a liquid level electrode interface 7. The liquid level electrode interface 7 is equipped with a common electrode 71, a liquid level upper limit electrode 72 and a liquid level upper limit electrode 73. The length of the liquid level upper limit electrode 73 is less than the length of the liquid level upper limit electrode 72.

[0046] Specifically, as the molten aluminum is injected, the liquid level gradually rises. When the liquid level contacts the lower end of the upper limit electrode 72, the molten aluminum connects the upper limit electrode 72 and the common electrode 71. The control unit detects this connection signal and immediately determines that the liquid level has reached the process setting value. Then, it closes the stop valve mechanism 3 and stops the replenishment. At this time, the liquid level is between the upper limit electrode 72 and the upper limit electrode 73, which is within the normal operating range.

[0047] If the molten aluminum continues to rise due to a malfunction of the stop valve mechanism 3, the liquid level will rise further and contact the upper limit electrode 73. At this time, the upper limit electrode 73 will be connected to the common electrode 71, immediately triggering an audible and visual alarm to alert the operator and prompt them to intervene.

[0048] Based on the above embodiments, the holding chamber 1 and the pressurizing chamber 2 are each equipped with an independent heater 8 and an independent temperature control unit.

[0049] Specifically, the heater 8 can be a silicon carbide rod or a silicon molybdenum rod. The heater 8 in the holding chamber 1 is mainly used to maintain the aluminum liquid at a stable holding temperature for a long time to ensure the fluidity of the melt and the degassing effect. The heater 8 in the pressurizing chamber 2 is used to compensate for the heat loss after the aluminum liquid flows in and to ensure that the temperature fluctuation of the aluminum liquid during the pressurization process is controlled within the allowable range of the process.

[0050] Each chamber's temperature control unit includes temperature sensors such as thermocouples or infrared temperature probes, a controller, and a power adjustment module. It can collect the temperature inside the chamber in real time and independently adjust the output power of the corresponding heater 8 to achieve closed-loop temperature control.

[0051] Based on the above embodiment, the cross-sectional area of ​​the two pressurized chambers 2 is smaller than the cross-sectional area of ​​the holding chamber 1; the holding chamber 1 is provided with a degassing rod 9, and the top of the degassing rod 9 is provided with an inert gas interface 91.

[0052] In other words, the cross-sectional areas of both pressurizing chambers 2 are smaller than those of the holding chamber 1, thus significantly reducing the gas volume. Since the height of the molten aluminum rise is directly proportional to the pressurizing gas pressure, the pressurizing gas pressure is the same when the molten aluminum rises to the same height. The amount of compressed gas required for the same pressurization pressure is related to the gas volume; therefore, the smaller cross-sectional area of ​​the pressurizing chamber 2 can significantly reduce the gas volume, thereby reducing the consumption of compressed gas at the same rise height and reducing the risk of molten aluminum oxidation and gas entrapment caused by gas disturbance. Simultaneously, the smaller chamber volume also helps to improve the rise response speed and pressure control accuracy, which is beneficial for obtaining dense, high-quality castings.

[0053] Furthermore, a degassing rod 9 is installed inside the holding chamber 1 to continuously purify the melt during the aluminum molten heat treatment process. The degassing rod 9 is inserted vertically from the furnace cover to near the bottom of the holding chamber 1, and its top is equipped with an inert gas interface 91 for connecting to an external high-purity nitrogen or argon gas source. During operation, the inert gas enters the aluminum molten metal through the internal channel of the degassing rod 9 and rises in the form of tiny bubbles. Utilizing the principle of partial pressure difference, it adsorbs and removes dissolved hydrogen and non-metallic inclusions from the aluminum molten metal, effectively reducing the gas content and impurity content of the melt and improving the internal quality of subsequent die-cast products.

[0054] Furthermore, an integrated low-pressure three-slot furnace also includes a control unit, which is a programmable logic controller. The control unit is connected to the stop valve mechanism 3, the lifting cylinder 34, the rotating cylinder 36, the heater 8, the temperature control sensor, the liquid level electrode, the gas control valve of the pressurization component, and the pressure sensor signal, respectively, for centralized monitoring and control of the entire furnace operation process.

[0055] Example 2: See Figure 6 The difference between this embodiment and embodiment 1 is that the two pressurized chambers 2 and their respective corresponding liquid outlet chambers 4 are arranged in a vertically symmetrical manner on the left and right sides of the holding chamber 1.

[0056] Example 3: See Figure 7 The difference between this embodiment and embodiment 1 is that the two pressurized chambers 2 and their respective corresponding liquid outlet chambers 4 are arranged in an inclined and symmetrical manner on the left and right sides of the holding chamber 1.

[0057] The working process of the integrated low-pressure three-cell furnace in this application is as follows: Molten aluminum is pre-filled into chamber 1 and heated to the required holding temperature by its independent heater 8. Simultaneously, an inert gas such as nitrogen or argon is continuously introduced through the degassing rod 9 to perform online degassing treatment on the molten aluminum.

[0058] When the die-casting equipment issues a permission to replenish the pressure chamber, the control unit activates the corresponding left or right side stop valve mechanism 3, and the lifting cylinder 34 drives the stop bar 33 to rise, opening the flow channel in the stop seat 32; the aluminum liquid flows from the holding chamber 1 into the target pressure chamber 2; the liquid level upper limit electrode 72 monitors the height of the aluminum liquid in the pressure chamber 2 in real time, and when the liquid level reaches the set upper limit, the stop valve mechanism 3 is automatically closed to stop the liquid inflow.

[0059] When the die-casting equipment issues a liquid supply request, the control unit confirms that the stop valve mechanism 3 is closed and the holding chamber 1 and the pressurizing chamber 2 are completely sealed and isolated. Then, the pressurizing component introduces compressed gas with controllable pressure, which can be air or inert gas, into the top of the pressurizing chamber 2 through the compressed gas interface 6. Since the cross-sectional area of ​​the pressurizing chamber 2 is smaller than that of the holding chamber 1, the pressure-bearing area is small, the gas consumption is low, and the risk of oxidation is significantly reduced. Under pressure, the aluminum liquid is stably transported to the die-casting machine through the liquid outlet chamber 4 and the riser pipe to complete the filling and pressure holding.

[0060] While pressurizing and supplying liquid in one pressure chamber 2, the other side can simultaneously perform liquid feeding, heat preservation, or standby; keeping the degassing and feeding operations in chamber 1 unaffected, truly realizing continuous production of "degassing, feeding, and die casting simultaneously". The two pressure chambers 2 can work alternately, or supply liquid to multiple die casting equipment at the same time, improving equipment utilization and production cycle.

[0061] After die casting is completed, the pressure chamber 2 is depressurized, and the liquid stop valve mechanism 3 remains closed, waiting for the next liquid replenishment command in the pressure chamber before entering the next working cycle.

[0062] The integrated low-pressure three-slot furnace provided in this application has the following significant advantages compared to the prior art: Because the holding chamber and the pressurizing chamber are physically isolated, the feeding and degassing of aluminum liquid are carried out independently in the holding chamber, without affecting the supply of liquid to the die-casting equipment from the pressurizing chamber. Even during the feeding or deep degassing process, liquid can still be continuously supplied to one or two die-casting machines, solving the problem of production stoppage caused by process interruption in traditional furnace types.

[0063] The room is designed to maintain continuous inert gas degassing to ensure that the hydrogen content and inclusion levels in the molten aluminum remain at an optimal level. Meanwhile, the outlet chamber is equipped with an independent temperature control system to effectively compensate for heat loss during the liquid-lifting process, thereby improving the internal quality and forming consistency of the castings.

[0064] Because the cross-sectional area of ​​the pressurizing chamber is smaller than that of the holding chamber, the pressure-exposed area of ​​the molten aluminum during the pressurization process is significantly reduced. On the one hand, the smaller pressure-exposed area reduces the contact area between the molten aluminum and the compressed gas, thereby effectively inhibiting the oxidation of the molten aluminum. On the other hand, to achieve the same liquid lifting height, the volume and amount of compressed gas required are greatly reduced. The reduction in gas consumption not only saves gas source consumption but also reduces the heat carried away by the discharge of a large amount of high-temperature gas, which helps to maintain the stability of the molten aluminum temperature and further ensures the quality of the castings.

[0065] The two pressurization chambers are symmetrically arranged and can alternately, synchronously or on demand supply liquid to multiple die-casting equipment, realizing the "one furnace, multiple machines" configuration and saving equipment procurement and floor space.

[0066] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0067] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A one-piece low-pressure three-slot furnace, characterized in that, The integrated low-pressure three-slot furnace includes: The holding chamber (1) is used to contain and heat the molten aluminum; Two pressurized chambers (2) are symmetrically distributed on both sides of the holding chamber (1); A stop valve mechanism (3) is provided in the partition area between the holding chamber (1) and each of the pressurizing chambers (2); A pressurizing component is installed on the pressurizing chamber (2) to apply pressure to the molten aluminum in the pressurizing chamber (2); Two liquid outlet chambers (4) are respectively connected to the corresponding pressurization chambers (2) for conveying aluminum liquid to the die-casting equipment; The stop valve mechanism (3) allows the molten aluminum in the holding chamber (1) to flow into the pressurizing chamber (2) when it is open, and seals and isolates the holding chamber (1) from the pressurizing chamber (2) when it is closed, so that the pressurizing chamber (2) can be pressurized independently.

2. The integrated low-pressure three-slot furnace according to claim 1, characterized in that, The stop valve mechanism (3) includes: The connector (31) is fixed to the furnace cover of the holding chamber (1); A stop-liquid seat (32) is fixedly installed at the bottom of the furnace of the holding chamber (1), and its interior is provided with a flow channel communicating with the pressurization chamber (2); A stop bar (33) is movably inserted into the stop seat (32) and is used to cooperate with the stop seat (32) to open or block the flow channel; The drive component is installed on the connector (31) and connected to the stop bar (33) to drive the stop bar (33) to move up and down in the vertical direction to control the opening and closing of the flow channel.

3. The integrated low-pressure three-slot furnace according to claim 2, characterized in that, The drive assembly includes a lifting cylinder (34), the drive end of which is connected to the stop bar (33) via a connecting shaft (35) for driving the stop bar (33) to move up and down.

4. The integrated low-pressure three-slot furnace according to claim 3, characterized in that, The drive assembly also includes a rotary cylinder (36), the output end of which is connected to a rotating component (37). The rotating component (37) is driven to cooperate with the connecting shaft (35) to drive the stop bar (33) to rotate around the axis after it is lowered into place, so as to achieve a tight seal with the stop seat (32).

5. The integrated low-pressure three-slot furnace according to claim 3, characterized in that, A leveling component (38) is provided between the connector (31) and the furnace cover of the retaining chamber (1).

6. The integrated low-pressure three-slot furnace according to claim 2, characterized in that, The pressurization assembly includes a pressurization cover (5) that is sealed and installed on the top of the pressurization chamber (2), and the pressurization cover (5) is provided with a compressed gas port (6) for introducing compressed gas.

7. The integrated low-pressure three-slot furnace according to claim 6, characterized in that, The pressure cover (5) is also provided with a liquid level electrode interface (7), which is equipped with a common electrode (71), a liquid level upper limit electrode (72) and a liquid level upper limit electrode (73). The length of the liquid level upper limit electrode (73) is less than the length of the liquid level upper limit electrode (72).

8. The integrated low-pressure three-slot furnace according to claim 7, characterized in that, The holding chamber (1) and the pressurizing chamber (2) are each equipped with an independent heater (8) and an independent temperature control unit.

9. The integrated low-pressure three-slot furnace according to claim 8, characterized in that, The cross-sectional area of ​​the two pressurized chambers (2) is smaller than that of the retaining chamber (1).

10. The integrated low-pressure three-slot furnace according to claim 9, characterized in that, The holding chamber (1) is provided with a degassing rod (9), and the top of the degassing rod (9) is provided with an inert gas interface (91).

Images