Double-station low-pressure casting machine capable of rapidly changing furnace

Abstract

The invention discloses a double-station rapid furnace changing low-pressure casting machine, and relates to the technical field of low-pressure casting machines. A heat preservation channel communicating with a molten aluminum heat preservation box is arranged at the bottom of the molten aluminum heat preservation box, a first liquid rising pipe set communicates with the heat preservation channel through a horizontal flow guide pipe, a drainage outlet aligned to the horizontal flow guide pipe is formed in the peripheral side face of a drainage pipeline, and a drainage inlet communicating with an inner cavity of the molten aluminum heat preservation box is formed above the drainage outlet. The air pressure lifting part is used for pressing aluminum liquid in the drainage pipeline into the horizontal flow guide pipe, a backflow buffer area is arranged between the bottom in the drainage pipeline and the horizontal flow guide pipe, a first through hole is formed in the second liquid rising pipe set, and when the second liquid rising pipe set is communicated with the flow guide pipe set, the first through hole is communicated with the horizontal flow guide pipe. In the low-pressure casting production process, the production efficiency of the whole low-pressure casting machine can be greatly improved through the two molten aluminum conveying mechanisms which alternately work, and continuous production of cast products is achieved under the condition that the low-pressure casting machine is not stopped.

Description

Technical Field

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

[0002] A low-pressure casting machine is a mechanical device that uses dry compressed gas at a relatively low pressure to die-cast the liquid metal in a holding furnace into the mold cavity through a riser tube, and then cools and solidifies it under a certain pressure to produce casting products. In the field of lightweight production of wheels and automobile chassis, low-pressure casting machines are often required to produce thin-walled aluminum shell products.

[0003] The production efficiency of a low-pressure casting machine is closely related to the rhythm and time of transferring molten aluminum from the holding furnace. When the efficiency of transferring molten aluminum from the holding furnace to the mold cavity is improved, the casting production efficiency of the entire low-pressure casting machine will inevitably be greatly improved. Traditional single-station casting methods often require the low-pressure casting machine to be shut down when replenishing molten aluminum in the holding furnace. After the molten aluminum is replenished, the low-pressure casting machine can resume normal production. This single-station casting method greatly reduces casting production efficiency. Summary of the Invention

[0004] The purpose of the present invention is to provide a double-station rapid furnace change low-pressure casting machine, which solves the problem of low casting production efficiency caused by the existing single-station casting method through the specific structural design of the casting mechanism, aluminum liquid insulation component, drainage component, pouring air control component, lifting and conducting component and linkage component.

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions: the present invention is a double-station fast furnace-changing low-pressure casting machine, including a casting mechanism and a double-station furnace-changing structure; the casting mechanism includes a casting molding cavity composed of a lower mold and an upper mold, and the casting molding cavity is provided with a guide pipe group connected to it on the circumference; the double-station furnace-changing structure includes two aluminum liquid conveying mechanisms, the aluminum liquid conveying mechanism includes an aluminum liquid insulation component, the aluminum liquid insulation component includes an aluminum liquid insulation box, the bottom of the aluminum liquid insulation box is provided with an insulation channel connected to it, and a plurality of first liquid rising pipe groups are evenly distributed on the circumference of the insulation channel, and the first liquid rising pipe group is connected to the insulation channel through a horizontal guide pipe; the drainage component includes an extension distribution A drainage pipe is arranged in the insulation channel, and a drainage outlet is provided on the side surface of the drainage pipe, which is aligned with the horizontal guide pipe. A drainage inlet is provided above the drainage outlet and is connected to the inner cavity of the aluminum liquid insulation box; a pouring air control component, the pouring air control component includes an air pressure lifting part that is fitted in the drainage pipe and can be elastically reset. The air pressure lifting part is used to press the aluminum liquid in the drainage pipe into the horizontal guide pipe. A reflux buffer zone is provided between the bottom of the drainage pipe and the horizontal guide pipe; a lifting and conducting component, the lifting and conducting component includes a second liquid rising pipe group that is slidably fitted in the first liquid rising pipe group, and a first conducting hole is provided on the second liquid rising pipe group. When the second liquid rising pipe group is connected with the guide pipe group, the first conducting hole is connected with the horizontal guide pipe.

[0006] In some embodiments, the casting mechanism includes a furnace changing control component; wherein, the furnace changing control component includes a furnace changing control frame, a furnace changing control shaft is rotatably arranged on the inner side of the furnace changing control frame, a furnace changing control motor connected to the furnace changing control shaft is provided on one side of the furnace changing control frame, 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 also includes a casting control component; wherein, the casting control component includes a casting supporting frame fixed on the furnace change control frame, a casting supporting platform is fixed on the inner side of the casting supporting frame, a lower mold is installed on the top of the casting supporting platform, and the output end of the first hydraulic cylinder installed on the top of the casting supporting frame is connected to the upper mold, and the guide pipe group is composed of a number of special-shaped guide pipes arranged in a circumferential direction, one end of the special-shaped guide pipe is connected to the inner cavity of the lower mold, and the other end of the special-shaped guide pipe is installed in the mounting hole on the casting supporting platform.

[0008] In some embodiments, the double-station furnace changing structure also includes a linkage component arranged 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 threadedly matched, and 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 also includes a reciprocating movable frame slidably connected to the furnace changing guide rail, the support frame and the reciprocating movable frames on both sides of the support frame are connected by fasteners, and the top of the reciprocating movable frame is respectively installed with an insulation box and a support seat, the aluminum liquid insulation box is installed on the top of the insulation box, and the insulation channel is arranged inside the insulation box. The first rising pipe group consists of a first rising pipe and a first return pipe, the first rising pipe is installed between the reciprocating movable frame and the aluminum liquid insulation box, the first return pipe is installed at the bottom of the aluminum liquid insulation box, and the first rising pipe and the first return pipe are connected through a first through hole, and the first rising pipe is connected to the corresponding horizontal guide pipe.

[0010] In some embodiments, the drainage assembly also includes a sealed cover installed on the top of the aluminum liquid insulation box and tightly attached to the top of the first reflux pipe. The drainage pipe is fixedly installed on the bottom of the sealed cover. A plurality of second through holes are provided in an annular array on the top of the sealed cover. A central mounting port connected to the drainage pipe is provided on the top of the sealed cover.

[0011] In some embodiments, the pouring air control assembly also includes a sealing seat installed on the top of the sealing cover and tightly fitted with the central mounting port, a pouring air control tube connected to the inner cavity of the drainage pipe is installed on the sealing seat, and a pressure relief valve is installed on the air relief pipe installed on the pouring air control tube, the air supply equipment installed on the top of the support seat is connected to the pouring air control tube, the air pressure lifting part includes an aluminum liquid pressurizing part that slides in the drainage pipe, a sealing tube that cooperates with the inner wall of the drainage pipe is fixed on the top of the aluminum liquid pressurizing part, a limiting guide tube is fixed on the inner wall of the sealing tube, a limiting guide rod that slides with the corresponding limiting guide tube is fixed on the bottom of the sealing seat, and the aluminum liquid pressurizing part and the sealing seat are connected by an elastic element.

[0012] In some embodiments, the second rising tube group includes a second rising tube that is slidably fitted on the inner wall of the first rising tube, a second return tube is fixedly sleeved on the peripheral side of the second rising tube, the second return tube is slidably fitted on the inner wall of the first return tube, the peripheral side of the second return tube is slidably fitted on the inner wall of the second through hole, the peripheral side of the second rising tube is slidably fitted on the inner wall of the first through hole, and the first conducting hole is arranged on the second rising tube and is connected to its inner cavity.

[0013] In some embodiments, an aluminum liquid input hole communicating with the inner cavity of the first reflux pipe is provided on the peripheral side surface, an aluminum liquid input cavity is provided in the wall of the second reflux pipe, a second conducting hole communicating with the aluminum liquid input cavity is provided on the peripheral side surface of the second reflux pipe, a second hydraulic cylinder is installed on the top of the support seat, and the output end of the second hydraulic cylinder is connected to a lifting seat, a hollow conveying ring coaxial with the aluminum liquid insulation box is fixed on one side of the lifting seat, the hollow conveying ring is communicated with the aluminum liquid input cavity through an aluminum liquid conveying pipe, a sealing portion is fixed on the top of the second reflux pipe, and an aluminum liquid input seat communicating with the inner cavity of the second reflux pipe is fixed on the peripheral side surface of the hollow conveying ring.

[0014] In some embodiments, a cold air generator is installed on the top of the casting support platform, a first refrigeration cavity is opened in the wall of the lower mold, the cold air generator and the first refrigeration cavity are connected through a cold air input pipe, a cold air output pipe connected to the first refrigeration cavity is installed on the side surface of the lower mold, a second refrigeration cavity is provided inside the upper mold, a plurality of exhaust holes connected to the second refrigeration cavity are opened on the top of the upper mold, a cold air conducting pipe connected to the second refrigeration cavity is provided in an annular array on the upper mold, and a cold air conducting port connected to the first refrigeration cavity is opened on the top of the lower mold.

[0015] The present invention has the following beneficial effects: 1. The present invention arranges a reciprocating double-station furnace-changing structure on the casting mechanism, and both furnace-changing stations on the double-station furnace-changing structure are provided with aluminum liquid conveying mechanisms. By alternating the operation 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 by the alternating operation of the two aluminum liquid conveying mechanisms during the low-pressure casting production process, thereby achieving continuous production of casting products without stopping the low-pressure casting machine.

[0016] 2. The present invention sets a reflux buffer zone between the bottom of the drainage pipe and the horizontal guide pipe, and provides a buffer reflux pipe on the side surface of the insulation channel close to the bottom. 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 side surface of the drainage pipe. After the aluminum liquid in the aluminum liquid insulation box is completely transported to the inside of the casting molding cavity, the small amount of aluminum liquid remaining in each special-shaped guide pipe and the second rising pipe flows back downward and flows back into the reflux buffer zone through the first conducting hole, the horizontal guide pipe and the buffer reflux pipe. At this time, there is no residual aluminum liquid in the second rising pipe, which can effectively avoid the solidification blockage problem caused by the direct contact between the residual aluminum liquid in the second rising pipe and the external space.

[0017] 3. In the present invention, when the second conducting hole on the second return pipe is aligned with the aluminum liquid input hole, the first conducting hole is still located 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 equipment. When the first conducting hole on the second rising pipe is connected to the horizontal guide pipe, the aluminum liquid can be transported to the casting and molding cavity by controlling the up and down reciprocating movement of the air pressure lifting part through air pressure. The coordinated use of the first rising pipe group and the second rising pipe group can not only realize the upstream transportation of aluminum liquid to the casting and molding cavity, but also realize the downstream transfer of aluminum liquid to the aluminum liquid insulation box.

[0018] 4. In the present invention, after the upper mold and the lower mold are closed, the various cold air conducting pipes on the upper mold are respectively connected to the cold air conducting ports on the lower mold. After the pouring of aluminum liquid inside the casting molding cavity is completed, a cold air flow is continuously transported to the first refrigeration cavity through the cold air generator and the cold air input pipe. Part of the cold air flow entering the first refrigeration cavity is discharged along the cold air output pipe, and the other part enters the second refrigeration cavity through the cold air conducting port and the cold air conducting pipe, and is then discharged from the various exhaust holes. In this process, the outer wall of the cast product is cooled by the cold air flow flowing through the first refrigeration cavity, and the inner wall of the cast product is cooled by the cold air flow flowing through the second refrigeration cavity. In this way, the cooling efficiency of the cast product can be greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 It is a structural schematic diagram of the double-station rapid furnace change low-pressure casting machine in the present invention.

[0021] Figure 2 for Figure 1 side view of the structure.

[0022] Figure 3 It is a structural schematic diagram of the casting mechanism in the present invention.

[0023] Figure 4 for Figure 3 Schematic diagram of part of the structure.

[0024] Figure 5 for Figure 4 Longitudinal structural cross-section view.

[0025] Figure 6 It is a structural diagram of the linkage component in the present invention.

[0026] Figure 7 It is a structural schematic diagram of the aluminum liquid conveying mechanism in the present invention.

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

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

[0029] Figure 10 Schematic diagram of the structure of the drainage component in the present invention.

[0030] Figure 11 It is a structural schematic diagram of the pouring gas control component in the present invention.

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

[0032] Figure 13 It is a structural schematic diagram of the lifting and conducting component in the present invention.

[0033] Figure 14 It is a structural cross-sectional view of the lifting conductive component in the present invention.

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

[0035] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0036] 1-casting mechanism, 101-lower mold, 102-upper mold, 103-furnace change control frame, 104-furnace change control shaft, 105-furnace change control motor, 106-furnace change guide rail, 107-limit channel, 108-casting support frame, 109-casting support platform, 110-first hydraulic cylinder, 111-special-shaped guide pipe, 112-cold air generator, 113-first refrigeration chamber, 114-cold air inlet pipe, 115 -cold air output pipe, 116-second refrigeration chamber, 117-exhaust hole, 118-cold air conduction pipe, 2-double-station furnace change 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 sleeve box, 406-support seat, 407-first liquid rising pipe, 408-first reflux pipe, 409-first through hole, 4 10-aluminum liquid input hole, 5-drainage component, 501-drainage pipe, 502-drainage outlet, 503-drainage inlet, 504-sealed cover, 505-second through hole, 506-center installation port, 6-pouring air control component, 601-sealing seat, 602-pouring air control pipe, 603-air relief pipe, 604-pressure relief valve, 605-gas supply equipment, 606-aluminum liquid pressurized parts, 607-sealing pipe, 608-limiting guide rod , 609-elastic element, 7-lifting conduction component, 701-first conduction hole, 702-second liquid lifting pipe, 703-second reflux pipe, 704-aluminum liquid input chamber, 705-second conduction 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 component, 801-linkage base, 802-support frame. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0038] For specific embodiment 1, please refer to Figure 1-15The present invention is a double-station rapid furnace-changing low-pressure casting machine, comprising a casting mechanism 1 and a double-station furnace-changing structure 2; the casting mechanism 1 comprises a casting molding cavity composed of a lower mold 101 and an upper mold 102, and a guide pipe group connected to the casting molding cavity is provided on the periphery of the casting molding cavity; the double-station furnace-changing structure 2 comprises two aluminum liquid conveying mechanisms 3, the aluminum liquid conveying mechanism 3 comprises an aluminum liquid insulation component 4, a drainage component 5, a pouring air control component 6 and a lifting and connecting component 7; the aluminum liquid insulation component 4 comprises an aluminum liquid insulation box 401, and the bottom of the aluminum liquid insulation box 401 is provided with an insulation channel 402 connected to the box, and a plurality of first liquid rising pipe groups are uniformly distributed around the insulation channel 402, and the first liquid rising pipe group is connected to the insulation channel 402 through a horizontal guide pipe 403; the drainage component 5 comprises an aluminum liquid extending and fitting in the insulation channel 4 02, a drainage pipe 501 is provided on the side surface of the drainage pipe 501 with a drainage outlet 502 aligned with the horizontal guide pipe 403, and a drainage inlet 503 connected to the inner cavity of the aluminum liquid insulation box 401 is provided above the drainage outlet 502; the pouring air control component 6 includes an air pressure lifting part that is fitted in the drainage pipe 501 and can be elastically reset. The air pressure lifting part is used to press the aluminum liquid in the drainage pipe 501 into the horizontal guide pipe 403, and a reflux buffer zone is provided between the bottom of the drainage pipe 501 and the horizontal guide pipe 403; the lifting and conducting component 7 includes a second liquid rising pipe group that is slidably fitted in the first liquid rising pipe group, and the second liquid rising pipe group is provided with a first conducting hole 701. When the second liquid rising pipe group is connected with the guide pipe group, the first conducting hole 701 is connected with the horizontal guide pipe 403.

[0039] In some embodiments, as Figure 2 、 Figure 3 、 Figure 4 and Figure 5 As shown, 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 provided 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 joint action of the furnace changing control motor 105 and the furnace changing control shaft 104, the horizontal reciprocating motion of the double-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 component; wherein the casting control component includes a casting carrier frame 108 fixed on the furnace change control frame 103, a casting carrier platform 109 is fixed inside the casting carrier frame 108, a lower mold 101 is installed on the top of the casting carrier platform 109 (the lower mold 101 and the casting carrier platform 109 are detachably connected), and the output end of the first hydraulic cylinder 110 installed on the top of the casting carrier frame 108 is connected to the upper mold 102 (the upper mold 102 is connected to the upper mold 102). The output ends of the first hydraulic cylinder 110 are also detachably connected), and the guide tube group consists of a number of special-shaped guide tubes 111 arranged in a circumferential direction. One end of the special-shaped guide tube 111 is connected to the inner cavity of the lower mold 101, and the other end of the special-shaped guide tube 111 is installed in the mounting hole on the casting support platform 109 (that is, the lower end of the special-shaped guide tube 111 is tightly inserted into the mounting hole on the casting support platform 109 to ensure that each special-shaped guide tube 111 is driven away from the casting support platform 109 when the lower mold 101 is removed).

[0041] In some embodiments, as Figure 2 and Figure 6 As shown, the double-station furnace changing structure 2 also includes a linkage component 8 arranged between the two aluminum liquid conveying mechanisms 3, and the linkage component 8 includes a linkage base 801 that slides with the limiting channel 107, and the linkage base 801 is sleeved on the furnace changing control shaft 104 and the two are threadedly matched. 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). The furnace changing control motor 105 controls the forward and reverse rotation of the furnace changing control shaft 104, and the aluminum liquid conveying mechanisms 3 on the two furnace changing stations can be driven to move horizontally back and forth under the action of the linkage component 8.

[0042] In some embodiments, as Figure 9As shown, the aluminum liquid insulation component 4 also includes a reciprocating movable frame 404 that is slidably connected to the furnace changing guide rail 106, and the support frame 802 is connected to the reciprocating movable frames 404 on both sides by fasteners. The top of the reciprocating movable frame 404 is respectively installed with an insulation box 405 and a support seat 406. The aluminum liquid insulation box 401 is installed on the top of the insulation box 405, and the insulation channel 402 is arranged inside the insulation box 405 (it should be noted that a buffer return pipe is provided on the side of the insulation channel 402 near the bottom, and the top of the buffer return pipe is connected to the horizontal guide pipe 403. At the same time, a reflux hole connected to the buffer return pipe is provided on the side of the drainage pipe 501, and the reflux hole is close to the bottom of the drainage pipe 501. The first rising pipe group is composed of a first rising pipe 407 and a first return pipe 408. The first rising pipe 407 is installed between the reciprocating 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 rising pipe 407 and the first return pipe 408 are connected through a first through hole 409. The first rising pipe 407 is connected to the corresponding horizontal guide pipe 403. A temperature control device for insulating the insulation box 405 and the aluminum liquid insulation box 401 is provided on the reciprocating frame 404. The aluminum liquid in the aluminum liquid insulation box 401 and the inner cavity of the insulation box 405 are insulated by the temperature control device.

[0043] In some embodiments, 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 tightly attached to the top of the first reflux pipe 408. The drainage pipe 501 is fixedly installed at the bottom of the sealed cover 504. A plurality of second through holes 505 are provided in a circumferential array on the top of the sealed cover 504. A central mounting port 506 communicating with the drainage pipe 501 is provided on the top of the sealed cover 504.

[0044] Furthermore, the pouring air control assembly 6 also includes a sealing seat 601 (an insulating seat may be selected) mounted on the top of the sealing cover 504 and tightly fitted with the central mounting port 506. A pouring air control pipe 602 communicating with the inner cavity of the drainage pipe 501 is mounted on the sealing seat 601. A pressure relief valve 604 (a solenoid valve may be selected) is mounted on the air relief pipe 603 mounted on the pouring air control pipe 602. The air supply device 605 mounted on the top of the support seat 406 is connected to the pouring air control pipe 602. The air pressure lifting portion includes a sliding fit. The aluminum liquid pressurizing member 606 in the drainage pipe 501 has a sealing tube 607 fixed on the top thereof, which cooperates with the inner wall of the drainage pipe 501. A limiting guide tube is fixed on the inner wall of the sealing tube 607. A limiting guide rod 608 is fixed on the bottom of the sealing seat 601, which slides with the corresponding limiting guide tube. The aluminum liquid pressurizing member 606 and the sealing seat 601 are connected by an elastic element 609. In the initial state, the aluminum liquid pressurizing member 606 is close to the top of the drainage inlet 503 (such as Figure 8 As shown), the aluminum liquid in the aluminum liquid insulation box 401 flows into the interior of the drainage pipe 501 through the drainage inlet 503, and then flows into the horizontal guide pipe 403 through the drainage outlet 502.

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

[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, and the aluminum liquid conveying mechanism 3 on the right furnace changing station is on the right side of the casting station. An aluminum liquid transfer device is provided on the right furnace changing station (it belongs to the conventional aluminum liquid transfer device in the field of low-pressure casting equipment in the actual production process, so it is not described in detail here). A certain amount of aluminum liquid is transferred to the aluminum liquid insulation box 401 through the aluminum liquid transfer device on the right (the amount of aluminum liquid transferred to the aluminum liquid insulation box 401 in a single time can be set according to actual production needs. The amount of molten aluminum transferred can be set as a single pouring amount or a multiple pouring amount, which is determined specifically according to the model of the casting to be produced. In this embodiment, the amount of molten aluminum transferred can be set as a single pouring amount). Subsequently, the furnace changing control motor 105 controls the furnace changing control shaft 104 to rotate, and under the action of the linkage component 8, the molten aluminum conveying mechanism 3 on the two furnace changing stations is driven to move synchronously to the left until the molten aluminum conveying mechanism 3 on the right furnace changing station moves to the bottom of the casting station, and the molten aluminum conveying mechanism 3 on the left furnace changing station moves to the left of the casting station.

[0047] Then, the upper mold 102 is controlled by the first hydraulic cylinder 110 to move downward to the set position. At this time, the upper mold 102 is just closed with the lower mold 101. The bottom of the upper mold 102 is tightly attached to the bottom of the lower mold 101, and the sealing plate at the top of the upper mold 102 is tightly attached to the top of the lower mold 101. When the upper mold 102 and the lower mold 101 are closed, a casting molding cavity is formed. Then, each second riser pipe group is controlled to move upward to the set position. At this time, the top of the second riser pipe group is tightly attached to the bottom of the casting carrier 109 and is connected to the corresponding special-shaped guide pipe 111. The first guide hole 701 on the second riser pipe 702 is connected to the horizontal guide pipe 403. Then, the air is transported to the inner cavity of the drainage pipe 501 through the air supply equipment 605 and the pouring air control pipe 602. Air is supplied, and the downward movement of the air pressure lifting part is realized through air pressure control. During the downward movement of the air pressure lifting part, the aluminum liquid in the drainage pipe 501 is hydraulically pumped into the horizontal guide pipe 403, and then enters the second liquid rising pipe 702 through the first conducting hole 701 and flows into the casting and molding cavity along the second liquid rising pipe 702 and the special-shaped guide pipe 111. After a certain amount of aluminum liquid in the drainage pipe 501 is hydraulically pumped into the casting and molding cavity through the air pressure lifting part, the pressure relief valve 604 on the air release pipe 603 is controlled to open to realize the pressure relief of the inner cavity of the drainage pipe 501. After the pressure relief is completed, the pressure relief valve 604 on the air release pipe 603 is controlled to close. The control system controls the number of up and down movements of the air pressure lifting part according to the set program to transport the aluminum liquid in the aluminum liquid insulation box 401 to the casting and molding cavity.

[0048] After the aluminum liquid in the aluminum liquid insulation box 401 is completely transported to the inside of the casting molding cavity, the gas supply device 605 is controlled to be closed and the pressure relief of the inner cavity of the drainage pipe 501 is completed, so that the air pressure lifting part returns to the initial position, and the small amount of aluminum liquid remaining in the circumferentially arranged various special-shaped guide pipes 111 and the second liquid rising pipe 702 flows back downward and flows back into the reflux buffer zone through the first conducting hole 701, the horizontal guide pipe 403 and the buffer reflux pipe. At this time, there is no residual aluminum liquid in the second liquid rising pipe 702, and then the reset is completed by controlling the downward movement of each second liquid rising pipe group (the first conducting hole 701 is now back to the position below the horizontal guide pipe 403), and then the casting molding cavity is continuously cooled and solidified. During the process of aluminum liquid gas pressure pouring and cooling and solidification, the aluminum liquid transfer unit on the left furnace changing station is used. The transfer equipment transfers the same volume of molten aluminum to the molten aluminum insulation box 401 on the left. After the casting product is cooled and solidified, the upper mold 102 is controlled by the first hydraulic cylinder 110 to move upward to complete the reset. At this time, the upper mold 102 is completely separated from the lower mold 101 to achieve demoulding. Then, the casting product in the lower mold 101 is taken out by the automatic robotic arm, and 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 molten aluminum conveying mechanism 3 on the two furnace changing stations is driven to move synchronously to the right until the molten aluminum conveying mechanism 3 on the left furnace changing station moves to the bottom of the casting station, and the molten aluminum conveying mechanism 3 on the right furnace changing station moves to the right of the casting station. Subsequently, the mass production of casting products can be realized in succession according to the same control method as above.

[0049] Specific embodiment 2, based on specific embodiment 1, as Figure 9 and Figure 13 As shown, the first reflux pipe 408 is provided with an aluminum liquid input hole 410 communicating with its inner cavity on its side surface, an aluminum liquid input cavity 704 is provided in the wall of the second reflux pipe 703, and a second conducting hole 705 communicating with the aluminum liquid input cavity 704 is provided on the side surface of the second reflux pipe 703. A second hydraulic cylinder 706 is installed on the top of the support seat 406, and 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 communicated with the aluminum liquid input cavity 704 through an aluminum liquid conveying pipe 709. A sealing portion 710 is fixed on the top of the second reflux pipe 703, and an aluminum liquid input seat 711 connected to its inner cavity is fixed on the side surface of the hollow conveying ring 708. When the hollow conveying ring 708 is controlled to move upward by the second hydraulic cylinder 706, the second liquid rising pipe groups that move upward synchronously gradually approach the casting support platform 109 until the sealing portion 710 on each second liquid rising pipe group is tightly attached to the bottom of the casting support platform 109. At this time, the top of each second liquid rising pipe 702 is tightly inserted into the corresponding special-shaped guide pipe 111, thereby realizing the connection between the second liquid rising pipe 702 and the corresponding special-shaped guide pipe 111.

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

[0051] Specific embodiment 3, based on specific embodiment 2, as Figure 4 and Figure 5As shown, a cold air generator 112 (a conventional device in the prior art, which will not be described in detail here) is installed on the top of the casting carrier 109, a first refrigeration cavity 113 is provided in the wall of the lower mold 101, the cold air generator 112 and the first refrigeration cavity 113 are connected via a cold air input pipe 114, a cold air output pipe 115 connected to the first refrigeration cavity 113 is installed on the side of the lower mold 101, a second refrigeration cavity 116 is provided inside the upper mold 102, a plurality of exhaust holes 117 connected to the second refrigeration cavity 116 are provided on the top of the upper mold 102, a cold air conducting pipe 118 connected to the second refrigeration cavity 116 is provided in an annular array on the upper mold 102, and a cold air conducting port connected to the first refrigeration cavity 113 is provided on the top of the lower mold 101; when the upper mold 102 and the lower mold are connected, the cold air After 101 is closed, the various cold air conducting pipes 118 on the upper mold 102 are respectively connected to the cold air conducting ports on the lower mold 101. After the pouring of the molten aluminum inside the casting molding cavity is completed, a cold air flow is continuously transported to the first refrigeration cavity 113 through the cold air generator 112 and the cold air input pipe 114. A part of the cold air flow entering the first refrigeration cavity 113 is discharged along the cold air output pipe 115, and the other part enters the second refrigeration cavity 116 through the cold air conducting port and the cold air conducting pipe 118, and is then discharged from the various exhaust holes 117. In this process, the outer wall of the cast product is cooled by the cold air flow flowing through the first refrigeration cavity 113, and the inner wall of the cast product is cooled by the cold air flow flowing through the second refrigeration cavity 116. In this way, the cooling efficiency of the cast product can be greatly improved.

[0052] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these 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 any one or more embodiments or examples.

[0053] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A dual-station rapid furnace change low-pressure casting machine, characterized in that: The invention comprises a casting mechanism (1) and a double-station furnace-changing structure (2); the casting mechanism (1) comprises a casting and molding cavity composed of a lower mold (101) and an upper mold (102); a guide pipe group communicating with the casting and molding cavity is provided on the periphery of the casting and molding cavity; the double-station furnace-changing structure (2) comprises two aluminum liquid conveying mechanisms (3), and the aluminum liquid conveying mechanisms (3) comprise: A molten aluminum insulation component (4), the molten aluminum insulation component (4) comprising an molten aluminum insulation box (401), a molten aluminum insulation box (401) having an insulation channel (402) in communication therewith provided at its bottom, a plurality of first liquid rising pipe groups uniformly distributed around the insulation channel (402), the first liquid rising pipe groups being in communication with the insulation channel (402) via a horizontal flow guide pipe (403); A drainage assembly (5), the drainage assembly (5) comprising a drainage pipe (501) extending and fitting within the heat preservation channel (402), a drainage outlet (502) aligned with the horizontal guide pipe (403) being provided on a peripheral side of the drainage pipe (501), and a drainage inlet (503) communicating with the inner cavity of the aluminum liquid heat preservation box (401) being provided above the drainage outlet (502); A pouring air control assembly (6), the pouring air control assembly (6) comprising an air pressure lifting portion fitted in a drainage pipe (501) and capable of elastic reset, the air pressure lifting portion being used to press aluminum liquid in the drainage pipe (501) into a horizontal drainage pipe (403), a reflux buffer zone being provided between the bottom of the drainage pipe (501) and the horizontal drainage pipe (403); A lifting and conducting assembly (7), comprising a second lifting pipe group slidingly fitted in the first lifting pipe group, the second lifting pipe group being provided with a first conducting hole (701), and when the second lifting pipe group is connected to the flow guide pipe group, the first conducting hole (701) is connected to the horizontal flow guide pipe (403).

2. A dual-station rapid furnace change low-pressure casting machine according to claim 1, characterized in that: 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 provided 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).

3. The dual-station rapid furnace change low-pressure casting machine according to claim 2, characterized in that: The casting mechanism (1) further includes a casting control assembly; wherein the casting control assembly includes a casting bearing frame (108) fixed on a furnace change control frame (103); a casting bearing platform (109) is fixed inside the casting bearing frame (108); a lower mold (101) is installed on the top of the casting bearing platform (109); an output end of a first hydraulic cylinder (110) installed on the top of the casting bearing frame (108) is connected to an upper mold (102); the guide pipe group is composed of a plurality of special-shaped guide pipes (111) arranged in an annular direction; one end of the special-shaped guide pipe (111) is connected to the inner cavity of the lower mold (101); and the other end of the special-shaped guide pipe (111) is installed in a mounting hole on the casting bearing platform (109).

4. The dual-station rapid furnace change low-pressure casting machine according to claim 3, characterized in that: The double-station furnace-changing structure (2) further comprises a linkage assembly (8) arranged between the two aluminum liquid conveying mechanisms (3), the linkage assembly (8) comprising a linkage base (801) that is slidably engaged with the limiting channel (107), the linkage base (801) being sleeved on the furnace-changing control shaft (104) and the two being threadedly engaged, and a support frame (802) fixed to the linkage base (801) is provided between the furnace-changing guide rails (106).

5. The dual-station rapid furnace change low-pressure casting machine according to claim 4, characterized in that: The aluminum liquid insulation component (4) further comprises a reciprocating frame (404) slidably connected to the furnace changing guide rail (106), the support frame (802) and the reciprocating frames (404) on both sides thereof are connected via fasteners, a thermal insulation box (405) and a support seat (406) are respectively installed on the top of the reciprocating frame (404), the aluminum liquid insulation box (401) is installed on the top of the thermal insulation box (405), and the thermal insulation channel (402) is arranged inside the thermal insulation box (405). The first rising pipe group consists of a first rising pipe (407) and a first return pipe (408), wherein the first rising pipe (407) is installed between the reciprocating frame (404) and the aluminum liquid insulation box (401), and the first return pipe (408) is installed at the bottom of the aluminum liquid insulation box (401), and the first rising pipe (407) and the first return pipe (408) are connected through a first through hole (409), and the first rising pipe (407) is connected to the corresponding horizontal guide pipe (403).

6. The dual-station rapid furnace change low-pressure casting machine according to claim 5, characterized in that: The drainage assembly (5) further comprises a sealed cover (504) mounted 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 mounted on the bottom of the sealed cover (504); a plurality of second through holes (505) are provided in an annular array on the top of the sealed cover (504); and a central mounting opening (506) is provided on the top of the sealed cover (504) and is in communication with the drainage pipe (501).

7. The dual-station rapid furnace change low-pressure casting machine according to claim 6, characterized in that: The pouring air control assembly (6) further comprises a sealing seat (601) mounted on the top of the sealing cover (504) and tightly matched with the central mounting port (506); a pouring air control pipe (602) communicating with the inner cavity of the drainage pipe (501) is mounted on the sealing seat (601); a pressure relief valve (604) is mounted on the air relief pipe (603) mounted on the pouring air control pipe (602); an air supply device (605) mounted on the top of the support seat (406) is connected to the pouring air control pipe (602); The air pressure lifting part includes an aluminum liquid pressurizing part (606) that is slidably engaged in the drainage pipe (501), a sealing tube (607) that is engaged with the inner wall of the drainage pipe (501) is fixed on the top of the aluminum liquid pressurizing part (606), a limiting conduit is fixed on the inner wall of the sealing tube (607), a limiting guide rod (608) that is slidably engaged with the corresponding limiting conduit is fixed on the bottom of the sealing seat (601), and the aluminum liquid pressurizing part (606) and the sealing seat (601) are connected via an elastic element (609).

8. The dual-station rapid furnace-changing low-pressure casting machine according to claim 7, characterized in that: The second liquid rising pipe group comprises a second liquid rising pipe (702) that is slidably fitted on the inner wall of the first liquid rising pipe (407); a second return pipe (703) is fixedly sleeved on the peripheral side of the second liquid rising pipe (702); the second return pipe (703) is slidably fitted on the inner wall of the first return pipe (408); the peripheral side of the second return pipe (703) is slidably fitted on the inner wall of the second through hole (505); the peripheral side of the second liquid rising pipe (702) is slidably fitted on the inner wall of the first through hole (409); the first conducting hole (701) is provided on the second liquid rising pipe (702) and is in communication with its inner cavity.

9. The dual-station rapid furnace-changing low-pressure casting machine according to claim 8, characterized in that: The first reflux pipe (408) is provided with an aluminum liquid input hole (410) in communication with its inner cavity on the peripheral side surface, an aluminum liquid input cavity (704) is provided in the wall of the second reflux pipe (703), and a second conducting hole (705) in communication with the aluminum liquid input cavity (704) is provided on the peripheral side surface of the second reflux pipe (703). A second hydraulic cylinder (706) is installed on the top of the support seat (406), and 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), and the hollow conveying ring (708) is connected to the aluminum liquid input cavity (704) through the aluminum liquid conveying pipe (709). A sealing portion (710) is fixed on the top of the second reflux pipe (703), and an aluminum liquid input seat (711) in communication with its inner cavity is fixed on the peripheral side surface of the hollow conveying ring (708).

10. The dual-station rapid furnace change 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 cavity (113) is opened in the wall of the lower mold (101), the cold air generator (112) and the first refrigeration cavity (113) are connected through a cold air input pipe (114), a cold air output pipe (115) connected to the first refrigeration cavity (113) is installed on the peripheral side of the lower mold (101), a second refrigeration cavity (116) is provided inside the upper mold (102), a plurality of exhaust holes (117) connected to the second refrigeration cavity (116) are opened on the top of the upper mold (102), a cold air conduction pipe (118) connected to the second refrigeration cavity (116) is provided in an annular array on the upper mold (102), and a cold air conduction port connected to the first refrigeration cavity (113) is opened on the top of the lower mold (101).

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