Double-station quick-change furnace low-pressure casting machine

Abstract

The application discloses a double-station quick-mold-changing low-pressure casting machine and relates to the technical field of low-pressure casting machines. In the application, the bottom of an aluminum liquid holding box is provided with a holding passage in communication with the aluminum liquid holding box, a first liquid lifting pipe group is communicated with the holding passage through a horizontal flow guide pipe, a drainage outlet aligned with the horizontal flow guide pipe is arranged on the peripheral surface of a drainage pipe, a drainage inlet in communication with the inner cavity of the aluminum liquid holding box is arranged above the drainage outlet, an air pressure lifting part is used for pressing the aluminum liquid in the drainage pipe into the horizontal flow guide pipe, a backflow buffer zone is arranged between the inner bottom of the drainage pipe and the horizontal flow guide pipe, and a first through hole is arranged on the second liquid lifting pipe group, so that the first through hole is communicated with the horizontal flow guide pipe when the second liquid lifting pipe group is communicated with the flow guide pipe group. In the low-pressure casting production process, the production efficiency of the whole low-pressure casting machine can be greatly improved through the two aluminum liquid conveying mechanisms working alternately, and the continuous production of the casting products can be realized without stopping the low-pressure casting machine.

Description

Technical Field

[0001] This invention belongs to the technical field of low-pressure casting machines, and in particular relates to a dual-station rapid furnace-changing low-pressure casting machine. Background Technology

[0002] Low-pressure casting machines are mechanical equipment that uses low-pressure dry compressed gas to press liquid metal in a holding furnace through a riser pipe into a mold cavity to fill the mold, and then cool and solidify it under a certain pressure to produce cast products. In the field of lightweight wheel hub and automobile chassis production, low-pressure casting machines are often needed to produce thin-walled aluminum shell products.

[0003] The production efficiency of low-pressure casting machines is closely related to the cycle time and frequency of aluminum molten material delivery from the holding furnace. Improving the efficiency of delivering molten aluminum from the holding furnace to the mold forming cavity will inevitably lead to a significant increase in the overall casting efficiency of the low-pressure casting machine. Traditional single-station casting methods often require stopping the low-pressure casting machine to replenish the molten aluminum in the holding furnace. Normal production can only resume after the replenishment is complete. This single-station casting method greatly reduces casting efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a dual-station rapid furnace-changing low-pressure casting machine. Through the specific structural design of the casting mechanism, aluminum liquid insulation component, flow guiding component, pouring gas control component, lifting and guiding component, and linkage component, the problem of low casting production efficiency caused by the existing single-station casting method is solved.

[0005] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution: The present invention is a dual-station rapid furnace-changing low-pressure casting machine, including a casting mechanism and a dual-station furnace-changing structure; the casting mechanism includes a casting cavity composed of a lower mold and an upper mold, and a group of guide pipes communicating with the casting cavity are provided around the periphery of the casting cavity; the dual-station furnace-changing structure includes two aluminum liquid conveying mechanisms, each aluminum liquid conveying mechanism including an aluminum liquid heat preservation component, the aluminum liquid heat preservation component including an aluminum liquid heat preservation tank, the bottom of the aluminum liquid heat preservation tank being provided with a heat preservation channel communicating with it, and a plurality of first liquid riser pipe groups evenly distributed around the heat preservation channel, the first liquid riser pipe groups being connected to the heat preservation channel through horizontal guide pipes; a flow guiding component, the flow guiding component including an extension distribution... The system includes: a drainage pipe within the insulation channel, with a drainage outlet on its circumferential side aligned with a horizontal guide pipe, and a drainage inlet above the drainage outlet communicating with the inner cavity of the aluminum liquid insulation box; a casting gas control assembly, comprising a pressure lifting part fitted within the drainage pipe and elastically repositionable, used to pressurize aluminum liquid in the drainage pipe into the horizontal guide pipe, with a backflow buffer zone between the bottom of the drainage pipe and the horizontal guide pipe; and a lifting and connecting assembly, comprising a second lifting pipe assembly slidably fitted within a first lifting pipe assembly, with a first connecting hole on the second lifting pipe assembly, the first connecting hole communicating with the horizontal guide pipe when the second lifting pipe assembly is connected to the guide pipe assembly.

[0006] In some embodiments, the casting mechanism includes a furnace changing control assembly; wherein the furnace changing control assembly includes a furnace changing control frame, a furnace changing control shaft is rotatably disposed on the inner side of the furnace changing control frame, a furnace changing control motor connected to the furnace changing control shaft is disposed on one side of the furnace changing control frame, and two furnace changing guide rails are symmetrically fixed on the top of the furnace changing control frame, and a limiting channel is provided between the furnace changing guide rails.

[0007] In some embodiments, the casting mechanism further includes a casting control component; wherein the casting control component includes a casting support frame fixed on a furnace changer control frame, a casting support platform fixed inside the casting support frame, a lower mold mounted on the top of the casting support platform, an upper mold connected to the output end of a first hydraulic cylinder mounted on the top of the casting support frame, and a guide pipe assembly composed of several irregularly shaped guide pipes arranged in a circumferential direction, one end of the irregularly shaped guide pipe communicating with the inner cavity of the lower mold, and the other end of the irregularly shaped guide pipe being installed in a mounting hole on the casting support platform.

[0008] In some embodiments, the dual-station furnace changing structure further includes a linkage component disposed between the two aluminum liquid conveying mechanisms. The linkage component includes a linkage base that slides with the limiting channel. The linkage base is sleeved on the furnace changing control shaft and the two are threaded together. A support frame fixed to the linkage base is provided between the furnace changing guide rails.

[0009] In some embodiments, the aluminum liquid insulation assembly further includes a reciprocating moving frame slidably connected to the furnace changing guide rail. The support frame is connected to the reciprocating moving frames on both sides by fasteners. An insulation box and a support base are respectively installed on the top of the reciprocating moving frame. The aluminum liquid insulation box is installed on the top of the insulation box. The insulation channel is arranged inside the insulation box. The first liquid riser assembly consists of a first liquid riser pipe and a first return pipe. The first liquid riser pipe is installed between the reciprocating moving frame and the aluminum liquid insulation box. The first return pipe is installed at the bottom of the aluminum liquid insulation box. The first liquid riser pipe and the first return pipe are connected through a first through hole. The first liquid riser pipe is connected to a corresponding horizontal guide pipe.

[0010] In some embodiments, the drainage assembly further includes a sealed cover installed on the top of the aluminum liquid insulation box and in close contact with the top of the first return pipe. The drainage pipe is fixedly installed at the bottom of the sealed cover. The top of the sealed cover is provided with a plurality of second through holes arranged in a circumferential array. The top of the sealed cover is provided with a central mounting port communicating with the drainage pipe.

[0011] In some embodiments, the casting gas control assembly further includes a sealing seat installed on the top of the sealed cover and sealed to the central mounting port. A casting gas control pipe communicating with the inner cavity of the drainage pipe is installed on the sealing seat. A pressure relief valve is installed on the vent pipe installed on the casting gas control pipe. An air supply device installed on the top of the support base is connected to the casting gas control pipe. The air pressure lifting part includes an aluminum liquid pressurizing component that slides in the drainage pipe. A sealing pipe that cooperates with the inner wall of the drainage pipe is fixed on the top of the aluminum liquid pressurizing component. A limit guide is fixed on the inner wall of the sealing pipe. A limit guide rod that slides in cooperation with the corresponding limit guide is fixed on the bottom of the sealing seat. The aluminum liquid pressurizing component and the sealing seat are connected by an elastic element.

[0012] In some embodiments, the second riser tube assembly includes a second riser tube that is slidably fitted on the inner wall of the first riser tube, a second return tube that is fixedly sleeved on the peripheral side of the second riser tube, the second return tube that is slidably fitted on the inner wall of the first return tube, the peripheral side of the second return tube that is slidably fitted on the inner wall of the second through hole, the peripheral side of the second riser tube that is slidably fitted on the inner wall of the first through hole, and the first through hole that is disposed on the second riser tube and communicates with its inner cavity.

[0013] In some embodiments, the first reflux pipe has an aluminum liquid inlet hole communicating with its inner cavity on its peripheral side, the second reflux pipe has an aluminum liquid inlet cavity inside its wall, the second reflux pipe has a second through hole communicating with the aluminum liquid inlet cavity on its peripheral side, the support base has a second hydraulic cylinder installed on its top, the output end of the second hydraulic cylinder is connected to a lifting base, a hollow conveying ring coaxial with the aluminum liquid insulation box is fixed on one side of the lifting base, the hollow conveying ring is connected to the aluminum liquid inlet cavity through an aluminum liquid conveying pipe, the second reflux pipe has a sealing part fixed on its top, and the hollow conveying ring has an aluminum liquid inlet seat communicating with its inner cavity fixed on its peripheral side.

[0014] In some embodiments, a cold air generator is installed on the top of the casting support platform, a first refrigeration chamber is formed in the wall of the lower mold, the cold air generator is connected to the first refrigeration chamber through a cold air input pipe, a cold air output pipe connected to the first refrigeration chamber is installed on the peripheral side of the lower mold, a second refrigeration chamber is provided inside the upper mold, a plurality of exhaust holes connected to the second refrigeration chamber are formed on the top of the upper mold, a cold air conduction pipe connected to the second refrigeration chamber is arranged in a circumferential array on the upper mold, and a cold air conduction port connected to the first refrigeration chamber is formed on the top of the lower mold.

[0015] The present invention has the following beneficial effects: 1. The present invention sets a reciprocating double-station furnace changing structure on the casting mechanism. Both furnace changing stations on the double-station furnace changing structure are equipped with aluminum liquid conveying mechanisms. Through the alternating work of the aluminum liquid conveying mechanisms on different furnace changing stations, the production efficiency of the entire low-pressure casting machine can be greatly improved in the low-pressure casting production process, so as to meet the continuous production of casting products without stopping the low-pressure casting machine.

[0016] 2. This invention establishes a reflux buffer zone between the bottom of the drainage pipe and the horizontal guide pipe. A buffer reflux pipe is connected to the bottom of the insulation channel on its periphery. The top of the buffer reflux pipe is connected to the horizontal guide pipe. At the same time, a reflux hole connected to the buffer reflux pipe is provided on the periphery of the drainage pipe. After the aluminum liquid in the aluminum liquid insulation box is completely transported into the casting cavity, the small amount of aluminum liquid remaining in each irregular guide pipe and the second liquid riser flows downward back through the first guide hole, the horizontal guide pipe and the buffer reflux pipe back into the reflux buffer zone. At this time, there is no residual aluminum liquid in the second liquid riser. This effectively avoids the solidification and blockage problem caused by the residual aluminum liquid in the second liquid riser coming into direct contact with the external space.

[0017] 3. When the second through hole on the second return pipe is aligned with the aluminum liquid inlet hole, the first through hole is still below the horizontal guide pipe. A certain amount of aluminum liquid can be transported to the aluminum liquid insulation box through the aluminum liquid transfer device. When the first through hole on the second riser pipe is connected to the horizontal guide pipe, the aluminum liquid can be transported to the casting cavity by controlling the up and down reciprocating motion of the air pressure lifting part. Through the coordinated use of the first riser pipe group and the second riser pipe group, not only can the aluminum liquid be transported upward to the casting cavity, but the aluminum liquid can also be transferred downward to the aluminum liquid insulation box.

[0018] 4. After the upper and lower molds are closed, the cold air pipes on the upper mold are connected to the cold air ports on the lower mold. After the aluminum liquid is poured into the casting cavity, cold air is continuously supplied to the first cooling chamber through the cold air generator and the cold air input pipe. Part of the cold air entering the first cooling chamber is discharged along the cold air output pipe, and the other part enters the second cooling chamber through the cold air port and the cold air pipe, and is then discharged through the various exhaust holes. In this process, the cold air flowing through the first cooling chamber cools the outer wall of the casting product, and at the same time, the cold air flowing through the second cooling chamber cools the inner wall of the casting product, thus greatly improving the cooling efficiency of the casting product. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of the dual-station rapid furnace-changing low-pressure casting machine in this invention.

[0021] Figure 2 for Figure 1 A structural side view.

[0022] Figure 3 This is a schematic diagram of the casting mechanism in this invention.

[0023] Figure 4 for Figure 3 A partial structural diagram.

[0024] Figure 5 for Figure 4 A longitudinal structural sectional view.

[0025] Figure 6 This is a schematic diagram of the linkage component in this invention.

[0026] Figure 7 This is a schematic diagram of the aluminum liquid conveying mechanism in this invention.

[0027] Figure 8 This is a diagram showing the internal structure of the aluminum liquid conveying mechanism in this invention.

[0028] Figure 9 This is a cross-sectional view of the aluminum liquid insulation component in this invention.

[0029] Figure 10 This is a schematic diagram of the drainage component in this invention.

[0030] Figure 11 This is a schematic diagram of the structure of the casting gas control component in this invention.

[0031] Figure 12 This is a cross-sectional view of the gas-controlled casting component in this invention.

[0032] Figure 13 This is a schematic diagram of the lifting and conducting component in this invention.

[0033] Figure 14 This is a cross-sectional view of the lifting and conducting assembly in this invention.

[0034] Figure 15 for Figure 14 Enlarged view of the local structure at point A in the middle.

[0035] The attached diagram lists the components represented by each number as follows:

[0036] 1-Casting mechanism, 101-Lower mold, 102-Upper mold, 103-Furnace changing control frame, 104-Furnace changing control shaft, 105-Furnace changing control motor, 106-Furnace changing guide rail, 107-Limiting channel, 108-Casting support frame, 109-Casting support platform, 110-First hydraulic cylinder, 111-Irregularly shaped guide pipe, 112-Cold gas generator, 113-First refrigeration chamber, 114-Cold gas input pipe, 115 - Cold air output pipe, 116-Second refrigeration chamber, 117-Exhaust port, 118-Cold air conduit pipe, 2-Dual-station furnace changing structure, 3-Aluminum liquid conveying mechanism, 4-Aluminum liquid insulation component, 401-Aluminum liquid insulation box, 402-Insulation channel, 403-Horizontal guide pipe, 404-Reciprocating moving frame, 405-Insulation box, 406-Support base, 407-First liquid riser pipe, 408-First return pipe, 409-First through hole, 4 10-Aluminum liquid inlet port, 5-Drainage assembly, 501-Drainage pipe, 502-Drainage outlet, 503-Drainage inlet, 504-Sealing cover, 505-Second through hole, 506-Center mounting port, 6-Pouring gas control assembly, 601-Sealing seat, 602-Pouring gas control pipe, 603-Vent pipe, 604-Pressure relief valve, 605-Gas supply equipment, 606-Aluminum liquid pressurizing component, 607-Sealing pipe, 608-Limiting guide rod 609-Elastic element, 7-Lifting and guiding assembly, 701-First guiding hole, 702-Second liquid lifting pipe, 703-Second return pipe, 704-Aluminum liquid input chamber, 705-Second guiding hole, 706-Second hydraulic cylinder, 707-Lifting seat, 708-Hollow conveying ring, 709-Aluminum liquid conveying pipe, 710-Sealing part, 711-Aluminum liquid input seat, 8-Linkage assembly, 801-Linkage base, 802-Support frame. Detailed Implementation

[0037] 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.

[0038] For a specific implementation example, please refer to Implementation Example 1. Figure 1-15This invention relates to a dual-station rapid furnace-changing low-pressure casting machine, comprising a casting mechanism 1 and a dual-station furnace-changing structure 2. The casting mechanism 1 includes a casting cavity composed of a lower mold 101 and an upper mold 102, with a flow guide pipe assembly communicating with the casting cavity on its periphery. The dual-station furnace-changing structure 2 includes two aluminum liquid conveying mechanisms 3, each including an aluminum liquid insulation component 4, a flow guide component 5, a casting gas control component 6, and a lifting and guiding component 7. The aluminum liquid insulation component 4 includes an aluminum liquid insulation box 401, with an insulation channel 402 communicating with the bottom of the aluminum liquid insulation box 401. Several first liquid riser pipe assemblies are evenly distributed around the insulation channel 402, and the first liquid riser pipe assemblies are connected to the insulation channel 402 via horizontal flow guide pipes 403. The flow guide component 5 includes components extending and fitting into the insulation channel 402. The 02 includes a drainage pipe 501 with a drainage outlet 502 aligned with the horizontal guide pipe 403 on its circumferential side. Above the drainage outlet 502 is a drainage inlet 503 communicating with the inner cavity of the aluminum liquid insulation box 401. The pouring gas control assembly 6 includes a pneumatic lifting part that fits inside the drainage pipe 501 and can be elastically reset. The pneumatic lifting part is used to pressurize the aluminum liquid in the drainage pipe 501 into the horizontal guide pipe 403. A backflow buffer is provided between the bottom of the drainage pipe 501 and the horizontal guide pipe 403. The lifting and guiding assembly 7 includes a second lifting pipe group that slides inside the first lifting pipe group. The second lifting pipe group is provided with a first guiding hole 701. When the second lifting pipe group is connected to the guide pipe group, the first guiding hole 701 is connected to the horizontal guide pipe 403.

[0039] In some implementation schemes, such as Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the casting mechanism 1 includes a furnace changing control assembly; wherein, the furnace changing control assembly includes a furnace changing control frame 103, a furnace changing control shaft 104 is rotatably arranged inside the furnace changing control frame 103, a furnace changing control motor 105 connected to the furnace changing control shaft 104 is provided on one side of the furnace changing control frame 103, two furnace changing guide rails 106 are symmetrically fixed on the top of the furnace changing control frame 103, and a limiting channel 107 is provided between the furnace changing guide rails 106. Through the combined action of the furnace changing control motor 105 and the furnace changing control shaft 104, the horizontal reciprocating motion of the dual-station furnace changing structure 2 between the two furnace changing guide rails 106 can be realized.

[0040] Furthermore, the casting mechanism 1 also includes a casting control assembly; wherein, the casting control assembly includes a casting support frame 108 fixed on the furnace changer control frame 103, a casting support platform 109 fixed inside the casting support frame 108, a lower mold 101 mounted on the top of the casting support platform 109 (the lower mold 101 and the casting support platform 109 are detachably connected), and an upper mold 102 connected to the output end of a first hydraulic cylinder 110 mounted on the top of the casting support frame 108 (the upper mold 102 and the casting support platform 109 are detachably connected). The output ends of the first hydraulic cylinder 110 are also detachably connected. The guide tube group consists of several irregularly shaped guide tubes 111 arranged in a ring. One end of the irregularly shaped guide tube 111 is connected to the inner cavity of the lower mold 101, and the other end of the irregularly shaped guide tube 111 is installed in the mounting hole on the casting support platform 109 (that is, the lower end of the irregularly shaped guide tube 111 is tightly inserted into the mounting hole on the casting support platform 109 to ensure that each irregularly shaped guide tube 111 is driven to detach from the casting support platform 109 when the lower mold 101 is disassembled).

[0041] In some implementation schemes, such as Figure 2 and Figure 6 As shown, the dual-station furnace changing structure 2 also includes a linkage component 8 located between the two aluminum liquid conveying mechanisms 3. The linkage component 8 includes a linkage base 801 that slides with the limiting channel 107. The linkage base 801 is sleeved on the furnace changing control shaft 104 and the two are threaded together. A support frame 802 fixed to the linkage base 801 is provided between the furnace changing guide rails 106 (that is, the support frame 802 moves along the space between the two furnace changing guide rails 106). By controlling the forward and reverse rotation of the furnace changing control shaft 104 through the furnace changing control motor 105, the aluminum liquid conveying mechanism 3 on the two furnace changing stations can be driven to reciprocate horizontally under the action of the linkage component 8.

[0042] In some implementation schemes, such as Figure 9As shown, the aluminum liquid insulation assembly 4 also includes a reciprocating moving frame 404 slidably connected to the furnace guide rail 106. The support frame 802 is connected to the reciprocating moving frames 404 on both sides by fasteners. An insulation box 405 and a support base 406 are respectively installed on the top of the reciprocating moving frame 404. The aluminum liquid insulation box 401 is installed on the top of the insulation box 405. The insulation channel 402 is set inside the insulation box 405. (It should be noted that a buffer return pipe is connected to the side of the insulation channel 402 near the bottom. The top of the buffer return pipe is connected to the horizontal guide pipe 403. At the same time, a return hole connected to the buffer return pipe is provided on the side of the flow pipe 501. The return hole is close to the bottom of the flow pipe 501.) The arrangement of the components (the return hole and buffer return pipe are not shown in the figure) is as follows: the first liquid riser assembly consists of a first liquid riser 407 and a first return pipe 408. The first liquid riser 407 is installed between the reciprocating moving frame 404 and the aluminum liquid insulation box 401. The first return pipe 408 is installed at the bottom of the aluminum liquid insulation box 401. The first liquid riser 407 and the first return pipe 408 are connected through a first through hole 409. The first liquid riser 407 is connected to the corresponding horizontal guide pipe 403. A temperature control device for heat preservation of the insulation box 405 and the aluminum liquid insulation box 401 is provided on the reciprocating moving frame 404. The aluminum liquid in the aluminum liquid insulation box 401 and the inner cavity of the insulation box 405 are heat-preserved by the temperature control device.

[0043] In some implementation schemes, such as Figure 10 , Figure 11 and Figure 12 As shown, the drainage assembly 5 also includes a sealed cover 504 installed on the top of the aluminum liquid insulation box 401 and closely attached to the top of the first return pipe 408. The drainage pipe 501 is fixedly installed at the bottom of the sealed cover 504. The top of the sealed cover 504 is provided with a plurality of second through holes 505 arranged in a circumferential array. The top of the sealed cover 504 is provided with a central mounting port 506 that communicates with the drainage pipe 501.

[0044] Furthermore, the casting gas control assembly 6 also includes a sealing seat 601 (optionally a heat-insulating seat) installed on the top of the sealing cover 504 and sealingly fitted with the central mounting port 506. A casting gas control pipe 602 communicating with the inner cavity of the drainage pipe 501 is installed on the sealing seat 601. A pressure relief valve 604 (can be a solenoid valve) is installed on the vent pipe 603 installed on the casting gas control pipe 602. An air supply device 605 installed on the top of the support base 406 is connected to the casting gas control pipe 602. The air pressure lifting part includes a sliding fit. An aluminum liquid pressurizing component 606 is installed inside the drainage pipe 501. A sealing pipe 607, which mates with the inner wall of the drainage pipe 501, is fixed to the top of the aluminum liquid pressurizing component 606. A limiting guide tube is fixed to the inner wall of the sealing pipe 607. A limiting guide rod 608, which slides with the corresponding limiting guide tube, is fixed to the bottom of the sealing seat 601. The aluminum liquid pressurizing component 606 and the sealing seat 601 are connected by an elastic element 609. In the initial state, the aluminum liquid pressurizing component 606 is close to the top of the drainage inlet 503 under the action of the elastic element 609 (e.g., ...). Figure 8 As shown, the aluminum liquid in the aluminum liquid insulation box 401 flows by gravity from the inlet 503 into the inside of the inlet pipe 501, and then flows into the horizontal guide pipe 403 from the outlet 502.

[0045] In some implementation schemes, such as Figure 13 As shown, the second riser tube assembly includes a second riser tube 702 that is slidably fitted on the inner wall of the first riser tube 407. A second return tube 703 is fixedly sleeved on the circumferential side of the second riser tube 702. The second return tube 703 is slidably fitted on the inner wall of the first return tube 408. The circumferential side of the second return tube 703 is slidably fitted on the inner wall of the second through hole 505. The circumferential side of the second riser tube 702 is slidably fitted on the inner wall of the first through hole 409. A first through hole 701 is provided on the second riser tube 702 and communicates with its inner cavity (specifically, the internal flow channel of the second riser tube 702 is provided above the first through hole 701 and the two are connected to ensure that the aluminum liquid returning along the second riser tube 702 can completely enter the horizontal guide tube 403 through the first through hole 701, and then flow into the return buffer zone in the drainage pipe 501 from the horizontal guide tube 403, so that no aluminum liquid remains in the second riser tube 702 after the return).

[0046] like Figure 2As shown, in the initial state, the aluminum liquid conveying mechanism 3 on the left furnace changing station is directly below the casting station, while the aluminum liquid conveying mechanism 3 on the right furnace changing station is to the right of the casting station. An aluminum liquid transfer device is installed on the right furnace changing station (this is a conventional aluminum liquid transfer device in the field of low-pressure casting equipment in actual production, so it will not be described in detail here). A certain amount of aluminum liquid is transferred to the aluminum liquid holding tank 401 through the aluminum liquid transfer device on the right (the amount of aluminum liquid transferred to the aluminum liquid holding tank 401 in a single transaction can be set according to actual production needs). The amount of molten aluminum transferred can be set as the amount used for a single pour or the amount used for multiple pours, depending on the specific casting model to be produced. In this embodiment, the amount of molten aluminum transferred can be set as the amount used for a single pour. Then, the furnace change control motor 105 controls the furnace change control shaft 104 to rotate. Under the action of the linkage component 8, the molten aluminum conveying mechanism 3 on the two furnace change stations moves synchronously to the left until the molten aluminum conveying mechanism 3 on the right furnace change station moves to the bottom of the casting station, while the molten aluminum conveying mechanism 3 on the left furnace change station moves to the left side of the casting station.

[0047] Subsequently, the upper mold 102 is moved downward to a set position by the first hydraulic cylinder 110. At this time, the upper mold 102 is closed with the lower mold 101, with the bottom of the upper mold 102 tightly against the bottom of the lower mold 101, and the sealing plate at the top of the upper mold 102 tightly against the top of the lower mold 101. When the upper mold 102 and the lower mold 101 are closed, a casting cavity is formed. Then, the second liquid riser pipe groups are moved upward to a set position by the control. At this time, the top of the second liquid riser pipe group is tightly against the bottom of the casting support platform 109 and is connected to the corresponding irregular guide pipe 111. The first through hole 701 on the second liquid riser pipe 702 is connected to the horizontal guide pipe 403. Then, the gas is supplied to the inner cavity of the drainage pipe 501 through the gas supply device 605 and the casting gas control pipe 602. Air is supplied, and the downward movement of the air pressure lifting unit is achieved through air pressure control. During the downward movement of the air pressure lifting unit, the aluminum in the drainage pipe 501 is forced into the horizontal guide pipe 403, and then enters the second liquid riser pipe 702 through the first guide hole 701 and flows into the casting cavity along the second liquid riser pipe 702 and the irregular guide pipe 111. After a certain amount of aluminum in the drainage pipe 501 is forced into the casting cavity by the air pressure lifting unit, the pressure relief valve 604 on the vent pipe 603 is opened to relieve the pressure in the cavity of the drainage pipe 501. After the pressure relief is completed, the pressure relief valve 604 on the vent pipe 603 is closed. The control system controls the number of times the air pressure lifting unit moves up and down according to the set program to transport the aluminum liquid in the aluminum liquid insulation box 401 to the casting cavity.

[0048] After the molten aluminum in the aluminum insulation box 401 is completely transferred into the casting cavity, the gas supply equipment 605 is shut off and the inner cavity of the drainage pipe 501 is depressurized, causing the gas pressure lifting unit to return to its initial position. The remaining small amount of molten aluminum in the circumferentially arranged irregularly shaped guide pipes 111 and the second liquid riser pipe 702 flows downward and back into the return buffer zone through the first through hole 701, the horizontal guide pipe 403, and the buffer return pipe. At this time, there is no residual molten aluminum in the second liquid riser pipe 702. Then, the second liquid riser pipe group is moved downward to complete the reset (at this time, the first through hole 701 is back below the horizontal guide pipe 403). Subsequently, the casting cavity is continuously cooled and solidified. During the molten aluminum gas pressure pouring and cooling solidification process, the molten aluminum is transferred through the aluminum transfer station on the left side. The transfer equipment transfers aluminum liquid of the same capacity to the left aluminum liquid heat preservation box 401. After the casting product has cooled and solidified, the upper mold 102 is moved upward by the first hydraulic cylinder 110 to complete the reset. At this time, the upper mold 102 is completely separated from the lower mold 101 to achieve demolding. Then, the casting product in the lower mold 101 is taken out by the automatic robotic arm. Then, the furnace changing control motor 105 controls the furnace changing control shaft 104 to rotate in the opposite direction. Under the action of the linkage component 8, the aluminum liquid conveying mechanism 3 on the two furnace changing stations moves synchronously to the right until the aluminum liquid conveying mechanism 3 on the left furnace changing station moves to the bottom of the casting station, and the aluminum liquid conveying mechanism 3 on the right furnace changing station moves to the right side of the casting station. The same control method described above can be used to realize the mass production of casting products.

[0049] Specific embodiment two, based on specific embodiment one, such as Figure 9 and Figure 13 As shown, the first return pipe 408 has an aluminum liquid inlet hole 410 communicating with its inner cavity on its peripheral side. The second return pipe 703 has an aluminum liquid inlet cavity 704 inside its wall. The second return pipe 703 has a second through hole 705 communicating with the aluminum liquid inlet cavity 704 on its peripheral side. A second hydraulic cylinder 706 is installed on the top of the support base 406. The output end of the second hydraulic cylinder 706 is connected to a lifting base 707. A hollow conveying ring 708 coaxial with the aluminum liquid insulation box 401 is fixed on one side of the lifting base 707. The hollow conveying ring 708 is connected to the aluminum liquid inlet cavity 704 through an aluminum liquid conveying pipe 709. The top of the second return pipe 703 is fixed with a sealing part 710, and the hollow conveying ring 708 is fixed with an aluminum liquid input seat 711 that communicates with its inner cavity. During the process of the hollow conveying ring 708 moving upward under the control of the second hydraulic cylinder 706, each of the second liquid riser pipe groups moving upward synchronously gradually approaches the casting support platform 109 until the sealing part 710 on each of the second liquid riser pipe groups is tightly attached to the bottom of the casting support platform 109. At this time, the top of each of the second liquid riser pipes 702 is tightly inserted into the corresponding irregular guide pipe 111, thus realizing the connection between the second liquid riser pipe 702 and the corresponding irregular guide pipe 111.

[0050] When a certain amount of molten aluminum needs to be transferred into the molten aluminum insulation tank 401, the hollow conveying ring 708 and each of the second return pipes 703 are first moved upward synchronously by the second hydraulic cylinder 706 until each of the second return pipes 703 is moved to the set position. At this time, the second through hole 705 on the second return pipe 703 is aligned with the molten aluminum inlet hole 410, while the first through hole 701 is still below the horizontal guide pipe 403 (in the initial state, the vertical distance between the first through hole 701 and the horizontal guide pipe 403 is twice the vertical distance between the second through hole 705 and the molten aluminum inlet hole 410). Then, a certain amount of molten aluminum is transferred from the aluminum inlet tank 401 by the molten aluminum transfer device. The liquid inlet seat 711 is transferred to the interior of the hollow conveying ring 708, and then enters the aluminum liquid inlet chamber 704 on each of the second return pipes 703 through each aluminum liquid conveying pipe 709. The aluminum liquid inlet chamber 704 flows out through the second through hole 705 into the aluminum liquid insulation box 401. In this way, a certain amount of aluminum liquid can be transferred into the inner cavity of the aluminum liquid insulation box 401. After the aluminum liquid transfer is completed, the hollow conveying ring 708 and each of the second return pipes 703 are controlled by the second hydraulic cylinder 706 to move down synchronously to complete the reset. At this time, the first through hole 701 and the second through hole 705 return to the initial position, and the second through hole 705 is misaligned with the aluminum liquid inlet hole 410 again.

[0051] Specific embodiment three, based on specific embodiment two, such as Figure 4 and Figure 5As shown, a cold air generator 112 (a conventional device in the prior art, so it will not be described in detail here) is installed on the top of the casting support platform 109. A first cooling chamber 113 is opened in the wall of the lower mold 101. The cold air generator 112 and the first cooling chamber 113 are connected by a cold air input pipe 114. A cold air output pipe 115 connected to the first cooling chamber 113 is installed on the periphery of the lower mold 101. A second cooling chamber 116 is provided inside the upper mold 102. Several exhaust holes 117 connected to the second cooling chamber 116 are opened on the top of the upper mold 102. Cold air conduction pipes 118 connected to the second cooling chamber 116 are arranged in a circumferential array on the upper mold 102. A cold air conduction port connected to the first cooling chamber 113 is opened on the top of the lower mold 101. The upper mold 102 and the lower mold 101 are connected in a cold air conduction port. After 101 is closed, each of the cold air conduction pipes 118 on the upper mold 102 is connected to the cold air conduction port on the lower mold 101. After the aluminum liquid is poured into the casting cavity, cold air is continuously supplied to the first cooling chamber 113 through the cold air generator 112 and the cold air input pipe 114. Part of the cold air entering the first cooling chamber 113 is discharged along the cold air output pipe 115, and the other part enters the second cooling chamber 116 through the cold air conduction port and the cold air conduction pipe 118, and is then discharged through each exhaust hole 117. In this process, the cold air flowing through the first cooling chamber 113 cools the outer wall of the casting product, and at the same time, the cold air flowing through the second cooling chamber 116 cools the inner wall of the casting product, thus greatly improving the cooling efficiency of the casting product.

[0052] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0053] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A dual-station rapid furnace-changing low-pressure casting machine, characterized in that, It includes a casting mechanism (1) and a dual-station furnace changing structure (2); the casting mechanism (1) includes a casting cavity composed of a lower mold (101) and an upper mold (102), and a guide pipe assembly communicating with the casting cavity is provided on its periphery; the dual-station furnace changing structure (2) includes two aluminum liquid conveying mechanisms (3), and the aluminum liquid conveying mechanism (3) includes: Aluminum liquid insulation component (4), the aluminum liquid insulation component (4) includes aluminum liquid insulation box (401), the bottom of the aluminum liquid insulation box (401) is provided with insulation channel (402) communicating with it, a plurality of first liquid riser groups are evenly distributed around the insulation channel (402), and the first liquid riser groups are connected to the insulation channel (402) through a horizontal guide pipe (403); The drainage assembly (5) includes a drainage pipe (501) extending and fitting within the insulation channel (402). The drainage pipe (501) has a drainage outlet (502) aligned with a horizontal guide pipe (403) on its circumferential side. Above the drainage outlet (502) is a drainage inlet (503) communicating with the inner cavity of the aluminum liquid insulation box (401). The casting gas control assembly (6) includes a gas pressure lifting part that fits in the drainage pipe (501) and can be elastically reset. The gas pressure lifting part is used to pressurize the aluminum in the drainage pipe (501) into the horizontal guide pipe (403). A backflow buffer is provided between the bottom of the drainage pipe (501) and the horizontal guide pipe (403). The lifting and guiding assembly (7) includes a second lifting pipe group that slides within the first lifting pipe group. The second lifting pipe group is provided with a first guiding hole (701). When the second lifting pipe group is connected to the guiding pipe group, the first guiding hole (701) is connected to the horizontal guiding pipe (403).

2. The dual-station rapid furnace-changing low-pressure casting machine according to claim 1, characterized in that, The casting mechanism (1) includes a furnace changing control component; wherein, the furnace changing control component includes a furnace changing control frame (103), a furnace changing control shaft (104) is rotatably arranged inside the furnace changing control frame (103), a furnace changing control motor (105) connected to the furnace changing control shaft (104) is provided on one side of the furnace changing control frame (103), and two furnace changing guide rails (106) are symmetrically fixed on the top of the furnace changing control frame (103), and a limiting channel (107) is provided between the furnace changing guide rails (106).

3. A dual-station rapid furnace-changing low-pressure casting machine according to claim 2, characterized in that, The casting mechanism (1) further includes a casting control component; wherein the casting control component includes a casting support frame (108) fixed on the furnace changer control frame (103), a casting support platform (109) fixed inside the casting support frame (108), a lower mold (101) installed on the top of the casting support platform (109), and an upper mold (102) connected to the output end of a first hydraulic cylinder (110) installed on the top of the casting support frame (108). The guide pipe group is composed of several irregularly shaped guide pipes (111) arranged in a ring. One end of the irregularly shaped guide pipe (111) is connected to the inner cavity of the lower mold (101), and the other end of the irregularly shaped guide pipe (111) is installed in the mounting hole on the casting support platform (109).

4. A dual-station rapid furnace-changing low-pressure casting machine according to claim 3, characterized in that, The dual-station furnace changing structure (2) also includes a linkage assembly (8) located between the two aluminum liquid conveying mechanisms (3). The linkage assembly (8) includes a linkage base (801) that slides with the limiting channel (107). The linkage base (801) is sleeved on the furnace changing control shaft (104) and the two are threaded together. A support frame (802) fixed to the linkage base (801) is provided between the furnace changing guide rails (106).

5. A dual-station rapid furnace-changing low-pressure casting machine according to claim 4, characterized in that, The aluminum liquid insulation assembly (4) further includes a reciprocating moving frame (404) slidably connected to the furnace changing guide rail (106). The support frame (802) is connected to the reciprocating moving frames (404) on both sides by fasteners. An insulation box (405) and a support base (406) are respectively installed on the top of the reciprocating moving frame (404). The aluminum liquid insulation box (401) is installed on the top of the insulation box (405). The insulation channel (402) is set inside the insulation box (405). The first liquid riser assembly consists of a first liquid riser (407) and a first return pipe (408). The first liquid riser (407) is installed between the reciprocating moving frame (404) and the aluminum liquid insulation box (401). The first return pipe (408) is installed at the bottom of the aluminum liquid insulation box (401). The first liquid riser (407) and the first return pipe (408) are connected through a first through hole (409). The first liquid riser (407) is connected to the corresponding horizontal guide pipe (403).

6. A dual-station rapid furnace-changing low-pressure casting machine according to claim 5, characterized in that, The drainage assembly (5) also includes a sealed cover (504) installed on the top of the aluminum liquid insulation box (401) and in close contact with the top of the first return pipe (408). The drainage pipe (501) is fixedly installed at the bottom of the sealed cover (504). The top of the sealed cover (504) is provided with a plurality of second through holes (505) arranged in a circumferential array. The top of the sealed cover (504) is provided with a central mounting port (506) communicating with the drainage pipe (501).

7. A dual-station rapid furnace-changing low-pressure casting machine according to claim 6, characterized in that, The casting gas control assembly (6) further includes a sealing seat (601) installed on the top of the sealing cover (504) and sealed to the central mounting port (506). A casting gas control pipe (602) communicating with the inner cavity of the drainage pipe (501) is installed on the sealing seat (601). A pressure relief valve (604) is installed on a vent pipe (603) installed on the casting gas control pipe (602). An air supply device (605) installed on the top of the support base (406) is connected to the casting gas control pipe (602). The air pressure lifting unit includes an aluminum liquid pressurizing component (606) that slides within the drainage pipe (501). The top of the aluminum liquid pressurizing component (606) is fixed with a sealing pipe (607) that mates with the inner wall of the drainage pipe (501). A limiting guide is fixed to the inner wall of the sealing pipe (607). A limiting guide rod (608) that slides with the corresponding limiting guide is fixed to the bottom of the sealing seat (601). The aluminum liquid pressurizing component (606) and the sealing seat (601) are connected by an elastic element (609).

8. A dual-station rapid furnace-changing low-pressure casting machine according to claim 7, characterized in that, The second riser assembly includes a second riser tube (702) that slides on the inner wall of the first riser tube (407). A second return tube (703) is fixedly sleeved on the periphery of the second riser tube (702). The second return tube (703) slides on the inner wall of the first return tube (408). The periphery of the second return tube (703) slides on the inner wall of the second through hole (505). The periphery of the second riser tube (702) slides on the inner wall of the first through hole (409). The first through hole (701) is provided on the second riser tube (702) and communicates with its inner cavity.

9. A dual-station rapid furnace-changing low-pressure casting machine according to claim 8, characterized in that, The first return pipe (408) has an aluminum liquid inlet hole (410) communicating with its inner cavity on its peripheral side. The second return pipe (703) has an aluminum liquid inlet cavity (704) in its wall. The second return pipe (703) has a second through hole (705) communicating with the aluminum liquid inlet cavity (704) on its peripheral side. The support base (406) is equipped with a second hydraulic cylinder (706) on its top. The output end of the second hydraulic cylinder (706) is connected to a lifting seat (707). A hollow conveying ring (708) coaxial with the aluminum liquid insulation box (401) is fixed on one side of the lifting seat (707). The hollow conveying ring (708) is connected to the aluminum liquid inlet cavity (704) through an aluminum liquid conveying pipe (709). The second return pipe (703) has a sealing part (710) fixed on its top. The hollow conveying ring (708) has an aluminum liquid inlet seat (711) communicating with its inner cavity fixed on its peripheral side.

10. A dual-station rapid furnace-changing low-pressure casting machine according to claim 9, characterized in that, A cold air generator (112) is installed on the top of the casting support platform (109). A first refrigeration chamber (113) is opened in the wall of the lower mold (101). The cold air generator (112) and the first refrigeration chamber (113) are connected by a cold air input pipe (114). A cold air output pipe (115) connected to the first refrigeration chamber (113) is installed on the periphery of the lower mold (101). A second refrigeration chamber (116) is provided inside the upper mold (102). A plurality of exhaust holes (117) connected to the second refrigeration chamber (116) are opened on the top of the upper mold (102). A cold air conduction pipe (118) connected to the second refrigeration chamber (116) is arranged in a circumferential array on the upper mold (102). A cold air conduction port connected to the first refrigeration chamber (113) is opened on the top of the lower mold (101).

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