Automatic die-casting device and die-casting method for aluminum shell of automobile receiver-drier

Abstract

The invention discloses an automatic die-casting device and method for an aluminum shell of an automobile receiver-drier, the die-casting device comprises a lower die and an upper die capable of forming a die cavity with the lower die, the bottom of the lower die is provided with a heat preservation furnace, and the lower die is internally provided with a liquid injection opening for molten metal to enter the cavity. A liquid lifting pipe with the top end communicated with the liquid injection opening is arranged in the heat preservation furnace, a valve piece in linkage with the upper mold is arranged between the liquid lifting pipe and the liquid injection opening, the valve piece is provided with a gateway capable of being closed, the two ends of the gateway are communicated with the liquid lifting pipe and the liquid injection opening respectively, the gateway is opened after mold closing, and the gateway is closed after mold splitting. The valve piece linked with the upper die is arranged between the liquid rising pipe and the lower die, so that the valve piece is communicated with the liquid rising pipe and the valve cavity during die assembly, the valve piece is closed during die splitting, and the problem that an oxidation film appears on the liquid level of molten metal in the liquid rising pipe due to the fact that air enters the liquid rising pipe is solved.

Description

Technical Field

[0001] The invention relates to the technical field of casting, and in particular to an automatic die-casting device and a die-casting method for an aluminum shell of an automobile liquid storage dryer. Background Art

[0002] Low-pressure casting is a method of filling the mold cavity with liquid metal under pressure to form a casting. The process of low-pressure casting is as follows: dry compressed air is introduced into a closed insulation furnace, and the molten metal in the insulation furnace rises along the riser under gas pressure and enters the mold cavity through the gate. The gas pressure in the insulation furnace is maintained until the molten metal in the mold cavity is completely solidified to form a casting. Then the pressure in the insulation furnace is released, so that the unsolidified molten metal in the riser flows back to the insulation furnace, and then the pressure of the clamping device on the top of the mold is released to take out the casting.

[0003] After the casting is taken out, the riser tube is circulated with air through the cavity, and air will enter the riser tube and contact the molten metal in the riser tube. At high temperatures, the molten metal is very easy to undergo oxidation reaction with oxygen. An oxide film will form on the surface of the molten metal, which may affect the fluidity of the molten metal and the quality of the casting during the subsequent casting process. The oxide film or oxide may be brought into the cavity, resulting in defects such as inclusions and pores on the surface of the casting, affecting the mechanical properties and appearance quality of the casting. The oxide film or oxide may accumulate on the inner wall of the riser tube, gradually causing the riser tube to be blocked, affecting the normal flow of the molten metal. The oxidized molten metal may not be used again, resulting in a waste of molten metal. The oxidation of the molten metal will change its fluidity and filling properties, resulting in an unstable casting process and affecting the consistency of the casting. Summary of the invention

[0004] In view of the problems existing in the prior art, an automated die-casting device and die-casting method for the aluminum shell of an automobile liquid storage dryer are provided. A valve member linked to an upper mold is arranged between a riser pipe and a lower mold, so that the valve member connects the riser pipe and the valve cavity when the mold is closed, and the valve member is closed when the mold is opened, thereby solving the problem of air entering the riser pipe and causing an oxide film to appear on the surface of the molten metal in the riser pipe.

[0005] In order to solve the problems of the prior art, the present invention provides an automated die-casting device for an aluminum shell of an automobile liquid storage dryer, comprising a lower mold and an upper mold capable of forming a mold cavity with the lower mold, a heat preservation furnace is arranged at the bottom of the lower mold, a liquid injection port for metal liquid to enter the cavity is arranged in the lower mold, a liquid riser is arranged at the top end of the liquid riser connected with the liquid injection port, a valve member linked to the upper mold is arranged between the liquid riser and the liquid injection port, the valve member has a closable gate, both ends of the gate are respectively connected with the liquid riser and the liquid injection port, the gate is opened after the mold is closed, and the gate is closed after the mold is separated; the gate has fixed channels distributed along the circumference of the liquid riser and a movable channel capable of conducting with the fixed channels, when the movable channel is in a connected state with the fixed channel, the gate is opened; when the movable channel is in a non-connected state with the fixed channel, the gate is closed.

[0006] Preferably, the fixed channel and the movable channel both extend in a direction parallel to the axis of the riser tube, and the molten metal passes through the fixed channel and the movable channel in sequence from the riser tube and then enters the mold cavity.

[0007] Preferably, the valve component includes a fixed seat and a movable seat, the fixed seat is fixedly arranged at the top of the rising tube, the fixed channel is distributed in the fixed seat, the movable seat is rotatably arranged at the top of the fixed seat and forms a linkage with the upper mold, and the movable channel is distributed on the movable seat; when the upper mold and the lower mold are separated, the movable seat rotates relative to the fixed seat to make the movable channel and the fixed channel staggered.

[0008] Preferably, the fixed seat has a lower recess extending into the riser tube, the fixed channel is distributed in the lower recess along the circumference of the riser tube, the movable seat has an upper recess extending into the inner cavity of the lower recess and loosely matched therewith, and the movable channel is distributed in the upper recess along the circumference of the riser tube.

[0009] Preferably, a linkage assembly for linking the upper mold and the movable seat is provided in the lower mold, and the linkage assembly includes a trigger member arranged at the top of the upper mold and capable of abutting against the upper mold, and an actuator arranged at the bottom of the upper mold and transmission connected to the movable seat. When the upper mold abuts against the trigger member and the mold is closed, the actuator can drive the movable seat to rotate on the fixed seat to connect the fixed channel and the movable channel.

[0010] Preferably, the trigger member includes a trigger rod which slides longitudinally through the lower mold, the trigger rod is elastically connected to the lower mold, and in an initial state, the top end of the trigger rod is higher than the mating surface of the lower mold; the actuator includes an actuator ring which is slidably arranged at the bottom of the lower mold along the axial direction of the liquid lifting tube, and the trigger rod is connected to the actuator ring; the inner periphery of the actuator ring is provided with an actuator cylinder extending downward, and the actuator cylinder is provided with an arc-shaped driving groove coaxial with the actuator cylinder, and the outer circumferential surface of the movable member is provided with a guide pin which slides with the arc-shaped driving groove.

[0011] Preferably, a conducting tube extending downward into the upper recess is provided at the bottom end of the liquid injection port, a sealing ring coaxial therewith is provided on the outer circumferential surface of the conducting tube, and the sealing ring abuts against the top end of the movable seat.

[0012] Preferably, the lower mold is also provided with a push rod which slides through the lower mold in the vertical direction. In the closed mold state, the top of the push rod is flush with the cavity. In the open mold state, the execution ring abuts the push rod and makes the top of the push rod higher than the bottom surface of the cavity.

[0013] An automatic die-casting method for an aluminum shell of an automobile liquid storage dryer, using an automatic die-casting device for an aluminum shell of an automobile liquid storage dryer, includes the following steps: Step 1: After the upper mold and the lower mold are closed, the valve channel of the valve component is connected to the liquid riser and the cavity; Step 2: Inject gas into the holding furnace, so that the molten metal in the riser rises and fills the cavity, and the gas pressure in the holding furnace is maintained until the molten metal in the cavity is completely solidified to form a casting; Step three, release the pressure in the holding furnace, and the unsolidified molten metal in the riser flows back to the holding furnace. After the mold is separated, the valve channel of the valve part is closed, and the casting is taken out.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The present application solves the problem of oxide film formation on the surface of molten metal due to air entering the riser tube by setting a valve member linked to the upper mold between the riser tube and the lower mold to accurately control the communication state between the riser tube and the valve cavity. During the mold closing process, the valve member automatically opens through a linkage assembly connected to the upper mold transmission to ensure that the passage between the riser tube and the valve cavity is unobstructed, allowing the molten metal to flow smoothly into the mold cavity; and during mold separation, the valve member closes the gate and cuts off the connection between the riser tube and the valve cavity, effectively preventing external air from entering the riser tube, thereby avoiding oxidation caused by the surface of the molten metal being exposed to the air. The surface quality of the aluminum liquid is significantly improved, the problem of affecting the quality of the casting due to the formation of an oxide film is avoided, and the stability and fluidity of the molten metal during the casting process are ensured.

[0015] In the present application, a combination of fixed channels and movable channels is used to effectively prevent large-volume metal slag in the molten metal from entering the mold cavity with the molten metal, thereby ensuring the quality of the casting, avoiding casting defects caused by the mixing of metal slag, such as holes, inclusions, etc., and ensuring the uniformity of the internal structure and surface quality of the casting.

[0016] In the present application, the fixed channel and the movable channel are both extended in a direction parallel to the axis of the riser tube, and the molten metal enters the mold cavity after passing through the fixed channel and the movable channel in sequence from the riser tube. This can reduce the sudden change in flow direction. In this case, the molten metal will not produce a large velocity gradient and direction change due to the sudden change in the direction of the channel, thereby effectively reducing the probability of turbulence. The molten metal can smoothly fill the mold cavity and improve the quality of the casting. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a stereoscopic diagram of an automatic die-casting device for an aluminum shell of an automobile liquid storage dryer of the present invention.

[0018] Figure 2 The invention discloses a stereoscopic cross-sectional view of an automatic die-casting device for an aluminum shell of an automobile liquid storage dryer.

[0019] Figure 3 The invention discloses a cross-sectional view of an automatic die-casting device for an aluminum shell of an automobile liquid storage dryer.

[0020] Figure 4 yes Figure 3 A partial enlarged view of point A.

[0021] Figure 5 The present invention is a stereoscopic diagram of a lower die in an automated die-casting device for an aluminum housing of an automobile liquid storage dryer.

[0022] Figure 6 It is a stereoscopic diagram of a linkage assembly in an automatic die-casting device for an aluminum shell of an automobile liquid storage dryer of the present invention.

[0023] Figure 7 The present invention is a stereoscopic diagram of a conducting pipe in an automatic die-casting device for an aluminum shell of an automobile liquid storage dryer.

[0024] Figure 8 The present invention is a three-dimensional exploded view of a valve member in an automatic die-casting device for an aluminum housing of an automobile liquid storage dryer.

[0025] Fig. 9 The present invention is a stereoscopic diagram of a triggering member in an automatic die-casting device for an aluminum housing of an automobile liquid storage dryer.

[0026] Fig.10 It is a three-dimensional view of the aluminum housing of the automotive liquid storage dryer.

[0027] The numbers in the figure are: 1, lower mold; 11, liquid injection port; 12, guide tube; 121, sealing ring; 13, ejector rod; 131, positioning ring; 14, lower elastic element; 2, upper mold; 3, valve member; 31, fixed seat; 311, fixed channel; 32, movable seat; 321, movable channel; 322, arc-shaped positioning groove; 4, insulation furnace; 5, liquid riser; 51, flange ring; 52, connecting pin; 61, frame; 62, fixed mold seat; 63, movable mold seat; 64, hydraulic cylinder; 71, trigger rod; 72, limit ring; 73, upper elastic element; 74, execution ring; 741, execution cylinder; 742, arc-shaped drive groove; 75, guide pin. DETAILED DESCRIPTION

[0028] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0029] Fig.10 The figure shows a stereoscopic view of the aluminum shell of the automotive liquid storage dryer to be processed. Figure 1 , Figure 2 and Figure 3 As shown, this embodiment provides an automated die-casting device for an aluminum shell of an automobile liquid storage dryer, comprising a lower mold 1 and an upper mold 2 that can form a mold cavity with the lower mold 1, a heat preservation furnace 4 is arranged at the bottom of the lower mold 1, and a liquid injection port 11 is provided in the lower mold 1 for supplying molten metal to the cavity, a riser 5 whose top is connected to the liquid injection port 11 is arranged in the heat preservation furnace 4, a valve member 3 linked to the upper mold 2 is arranged between the riser 5 and the liquid injection port 11, and the valve member 3 has a closable gate, and both ends of the gate are respectively connected to the riser 5 and the liquid injection port 11, the gate is opened after the mold is closed, and the gate is closed after the mold is separated.

[0030] It also includes a frame 61 and a fixed mold base 62 and a movable mold base 63 arranged on the frame 61, and the lower mold 1 is fixedly arranged on the fixed mold base 62. The insulation furnace 4 is arranged at the bottom of the fixed mold base 62. The upper mold 2 is arranged at the bottom end of the movable mold base 63, and a hydraulic cylinder 64 is arranged at the top of the frame 61. The output rod of the hydraulic cylinder 64 is fixedly connected to the movable mold base 63. The hydraulic cylinder 64 drives the movable mold base 63 to move up and down to realize the mold closing and parting operations. The hydraulic system adopts closed-loop control to ensure the precise adjustment of the mold closing force and the parting speed to meet different process requirements.

[0031] In the mold closing state, the gate is opened, and the molten metal enters the mold cavity through the riser tube 5 and the injection port 11; in the mold opening state, the gate is closed, effectively blocking external air from entering the riser tube 5 and preventing the formation of an oxide film on the surface of the molten metal in the riser tube 5.

[0032] The valve member 3 is provided to control the connection and closing of the liquid riser 5 and the liquid injection port 11 , thereby effectively preventing air from entering the liquid riser 5 .

[0033] like Figure 4 and Figure 8 As shown, the gate has a fixed channel 311 distributed along the circumference of the riser 5 and a movable channel 321 that can be connected to the fixed channel 311. When the movable channel 321 and the fixed channel 311 are in a connected state, the gate is opened; when the movable channel 321 and the fixed channel 311 are in a non-connected state, the gate is closed.

[0034] The gate system is composed of fixed channels 311 evenly distributed along the circumference of the riser 5, and movable channels 321 that can establish a conductive relationship with the fixed channels 311. When the movable channels 321 are connected to the fixed channels 311, the gate is opened, and the molten metal can flow from the riser 5 into the cavity through this communication path. In this working mode, through the passage formed by the fixed channels 311 and the movable channels 321, the molten metal enters the cavity in an orderly manner under the action of gravity or external pressure.

[0035] When the movable channel 321 is in a non-connected state with the fixed channel 311, the gate is closed to block air from entering the riser tube 5 to oxidize the molten metal in the riser tube 5. The combination of the fixed channel 311 and the movable channel 321 effectively prevents the large-volume metal slag in the molten metal from entering the mold cavity along with the molten metal.

[0036] like Figure 8 As shown, the fixed channel 311 and the movable channel 321 both extend in a direction parallel to the axis of the riser tube 5 , and the molten metal passes through the fixed channel 311 and the movable channel 321 in sequence from the riser tube 5 and then enters the mold cavity.

[0037] When the molten metal flows in the riser 5, the fixed channel 311 and the movable channel 321 extending parallel to the axial direction of the riser 5 can make the molten metal transition more smoothly. If the channel direction is consistent with the initial flow direction of the molten metal, the sudden change of the flow direction can be reduced. In this case, the molten metal will not produce a large velocity gradient and direction change due to the sudden change in the direction of the channel, thereby effectively reducing the probability of turbulence. Turbulence can cause particles inside the molten metal to collide and mix with each other, consume energy and may involve gas, and this parallel design can make the molten metal flow in a more laminar state, which helps to stabilize the flow rate.

[0038] For example, in the low-pressure casting process, turbulent flow can easily cause the molten metal to swirl in the mold cavity, entraining air to form pore defects. However, stable laminar flow can make the molten metal fill the mold cavity smoothly and improve the quality of the casting.

[0039] The parallel arrangement of the fixed channel 311 and the movable channel 321 with the axis of the riser tube 5 makes the flow path of the molten metal relatively regular. When the flow path of the molten metal is regular, the flow rate changes relatively smoothly and the pressure fluctuation is reduced accordingly.

[0040] like Figure 4 and Figure 8 As shown, the valve member 3 includes a fixed seat 31 and a movable seat 32. The fixed seat 31 is fixedly arranged at the top of the riser 5. The fixed channel 311 is distributed in the fixed seat 31. The movable seat 32 is rotatably arranged at the top of the fixed seat 31 and forms a linkage with the upper mold 2. The movable channel 321 is distributed on the movable seat 32. When the upper mold 2 and the lower mold 1 are separated, the movable seat 32 rotates relative to the fixed seat 31 to make the movable channel 321 staggered with the fixed channel 311.

[0041] The valve member 3 is mainly composed of a fixed seat 31 and a movable seat 32. The fixed seat 31 is firmly mounted on the top of the riser 5, and the fixed channels 311 are regularly distributed in the internal structure of the fixed seat 31. The movable seat 32 is rotatably arranged on the top of the fixed seat 31, and forms a linkage mechanism with the upper mold 2, and the movable channels 321 are orderly distributed on the movable seat 32.

[0042] When the upper mold 2 and the lower mold 1 are in the working state of parting operation, the movable seat 32 will rotate relative to the fixed seat 31. This rotation process makes the movable channel 321 and the fixed channel 311 form a staggered state in spatial position, thereby changing the connection state of the fluid channel.

[0043] When the upper mold 2 and the lower mold 1 are in the working condition of the mold closing operation, the movable seat 32 will produce a rotational movement relative to the fixed seat 31. This rotation process makes the movable channel 321 and the fixed channel 311 connected in space, thereby changing the connection state of the fluid channel.

[0044] like Figure 4 As shown, the fixed seat 31 has a lower recess extending into the riser tube 5, the fixed channel 311 is distributed in the lower recess along the circumference of the riser tube 5, the movable seat 32 has an upper recess extending into the inner cavity of the lower recess and gap-matched therewith, and the movable channel 321 is distributed in the upper recess along the circumference of the riser tube 5.

[0045] The fixing seat 31 has a concave portion extending downward and penetrating into the internal space of the riser tube 5. The concave portion forms a concave area of ​​a certain depth in the axial direction of the riser tube 5, providing a spatial structure for the convergence and transmission of the fluid. The fixed channels 311 are distributed in the internal structure of the concave portion in a uniform and orderly layout according to the circumferential direction of the riser tube 5. It is ensured that when the fluid flows out from the inside of the riser tube 5, a uniform and stable diversion effect can be achieved through the fixed channels 311, thereby providing stable fluid input conditions for subsequent process.

[0046] The movable seat 32 correspondingly has an upper recessed portion that is recessed upward and extends into the inner cavity of the lower recessed portion, and a clearance fit relationship is established between the upper recessed portion and the lower recessed portion. This intermittent fit can ensure the relative freedom of movement between the two when the movable seat 32 performs a specific movement, and ensure that a certain sealing performance is maintained in the fitting area to prevent fluid leakage. The movable channels 321 are also reasonably and regularly distributed in the upper recessed portion according to the circumferential direction of the riser 5. This distribution method echoes the layout of the fixed channels 311. When the movable seat 32 and the fixed seat 31 undergo relative movement, the relative position change between the movable channels 321 and the fixed channels 311 can accurately control the conduction and blocking states of the fluid channel, thereby achieving precise regulation of the fluid flow rate and flow direction.

[0047] like Figure 5 , Figure 6 , Figure 7 , Fig. 9 As shown, a linkage assembly for linking the upper mold 2 and the movable seat 32 is provided in the lower mold 1, and the linkage assembly includes a trigger member arranged at the top of the upper mold 2 and capable of abutting against the upper mold 2, and an actuator arranged at the bottom of the upper mold 2 and transmission connected to the movable seat 32. When the upper mold 2 abuts against the trigger member and the molds are closed, the actuator can drive the movable seat 32 to rotate on the fixed seat 31 to connect the fixed channel 311 and the movable channel 321.

[0048] The trigger is set at the top of the upper mold 2, and its structural design ensures that it can form a close and reliable abutment relationship with the corresponding part of the upper mold 2. During the mechanical movement process, the trigger can cooperate with the upper mold 2 when the mold is closed. When the mold closing process is started, the upper mold 2 moves down along the predetermined motion trajectory and abuts against the trigger, and the trigger can drive the mechanical instructions of the actuator to move. The actuator is arranged at the bottom of the upper mold 2 and establishes a stable transmission connection with the movable seat 32. When the actuator receives power from the trigger, it drives the movable seat 32 to rotate on the fixed seat 31. As the movable seat 32 rotates, the movable channels 321 distributed thereon gradually approach the fixed channels 311 on the fixed seat 31 in spatial position and finally achieve communication, thereby providing a smooth flow path for the subsequent process fluid and meeting the strict requirements for the fluid conduction state in the process.

[0049] like Figure 4 and Fig. 9 As shown, the trigger member includes a trigger rod 71 which slides longitudinally through the lower mold 1, the trigger rod 71 is elastically connected to the lower mold 1, and in the initial state, the top of the trigger rod 71 is higher than the mating surface of the lower mold 1; the actuator includes an actuator ring 74 which is slidably arranged at the bottom of the lower mold 1 along the axial direction of the liquid riser 5, and the trigger rod 71 is connected to the actuator ring 74; the inner periphery of the actuator ring 74 is provided with an actuator cylinder 741 extending downward, and the actuator cylinder 741 is provided with an arc-shaped driving groove 742 coaxial therewith, and the outer circumferential surface of the movable member is provided with a guide pin 75 which slides with the arc-shaped driving groove 742.

[0050] The top of the lower mold 1 is provided with an upper blind hole extending in the vertical direction. The top of the trigger rod 71 extends into the upper blind hole and is provided with a limit ring 72. An upper elastic element 73 is provided between the limit ring 72 and the bottom end of the upper blind hole.

[0051] When the mold closing process starts, the upper mold 2 follows the preset motion trajectory and moves downward in the vertical direction at a uniform speed toward the lower mold 1. During this process, the bottom end of the upper mold 2 abuts against the top end of the trigger rod 71. As the upper mold 2 continues to move downward, the trigger rod 71 begins to overcome the elastic restoring force applied by the upper elastic element 73. The upper elastic element 73 ensures that the trigger rod 71 stably maintains a position where the top end is higher than the clamping surface of the lower mold 1 in the initial state, and when it is subjected to the pressure of the upper mold 2, it can achieve smooth and stable longitudinal displacement by virtue of the elastic deformation of the spring. In the process of the trigger rod 71 overcoming the elastic force and moving downward, the trigger rod 71 reliably transmits its own longitudinal displacement to the actuator ring 74, driving the actuator ring 74 to move downward synchronously along the axial direction of the liquid riser 5. The actuator cylinder 741, which is closely connected to the actuator ring 74, also moves downward synchronously. The arc-shaped driving groove 742 on the actuator cylinder 741 is in sliding cooperation with the guide pin 75. In the process of the actuator cylinder 741 moving downward, the motion trajectory of the guide pin 75 is gradually transformed from simple linear motion to circular motion around the axis of the riser 5 under the constraint and guidance of the arc-shaped driving groove 742. The linear motion of the actuator ring 74 and the actuator cylinder 741 is accurately converted into the rotational motion of the movable seat 32 around the fixed seat 31. As the movable seat 32 rotates to a specific angle relative to the fixed seat 31, the movable channels 321 distributed on the movable seat 32 and the fixed channels 311 on the fixed seat 31 are precisely connected and connected in space. At this time, under the action of external pressure, the molten metal in the riser 5 can smoothly pass through the fixed channels 311 and the movable channels 321 in turn and be pressed into the mold cavity, providing sufficient material supply for the molding of the casting. When the casting process is completed and the mold separation process is entered, the trigger rod 71 begins to reset upward along the original path under the elastic restoring force released by the previously compressed upper elastic element 73. The elastic potential energy stored in the upper elastic element 73 is quickly converted into the mechanical energy of the trigger rod 71 at this time, pushing the trigger rod 71 to move upward. Due to the stable connection between the trigger rod 71 and the execution ring 74, the execution ring 74 and the execution cylinder 741 move upward synchronously. During the upward displacement of the execution cylinder 741. Under the constraint of the arc-shaped driving groove 742, the guide pin 75 rotates in the opposite direction along the axis of the riser 5, driving the movable seat 32 to rotate synchronously in the opposite direction, so that the movable channel 321 and the fixed channel 311 gradually intersect until the two are completely staggered. This action effectively blocks the passage between the cavity and the riser 5, preventing the outside air from entering the riser 5 through the cavity after the casting is taken out, thereby preventing the high-temperature molten metal in the riser 5 from oxidizing with the air, ensuring the quality and purity of the molten metal, and providing a reliable material basis for the subsequent casting process.

[0052] like Figure 4 and Figure 8 As shown, a conducting tube 12 extending downward to the upper recess is disposed at the bottom end of the liquid injection port 11 , and a sealing ring 121 coaxial therewith is disposed on the outer circumferential surface of the conducting tube 12 , and the sealing ring 121 abuts against the top end of the movable seat 32 .

[0053] A flange ring 51 is provided at the top end of the riser tube 5, and connecting pins 52 are provided on the flange ring 51 along its circumference. An arc-shaped positioning groove 322 distributed along its circumference and coaxial with the movable seat 32 is provided. The connecting pin 52 penetrates the flange ring 51, the fixed seat 31, the arc-shaped positioning groove 322 and the sealing ring 121 from bottom to top.

[0054] During system operation, the sealing ring 121 is in close contact with the top surface of the movable seat 32, and through its own elastic deformation, forms a reliable sealing barrier in the contact area between the two, effectively preventing the leakage of molten metal during the transmission process, ensuring the sealing and stability of the molten metal transmission during the casting process, and preventing the loss of molten metal due to leakage and the pollution of the surrounding working environment.

[0055] The movable seat 32 is provided with arc-shaped positioning grooves 322 which are evenly distributed along the circumferential direction and coaxial with the movable seat 32. During the assembly process, the connecting pin 52 passes through the flange ring 51, the fixed seat 31, the arc-shaped positioning groove 322 and the sealing ring 121 from bottom to top. The guiding effect of the arc-shaped positioning groove 322 limits the rotation angle and movement trajectory of the movable seat 32, which provides reliable mechanical positioning guarantee for the precise matching between the movable seat 32 and the fixed seat 31 during the mold closing and mold parting process, and the accurate connection and blocking of the movable channel 321 and the fixed channel 311, further improving the operation stability and reliability of the entire casting process system.

[0056] like Figure 4 As shown, the lower mold 1 is also provided with a push rod 13 that slides through the lower mold 1 in the vertical direction. In the closed mold state, the top of the push rod 13 is flush with the cavity. In the open mold state, the execution ring 74 abuts against the push rod 13 and makes the top of the push rod 13 higher than the bottom surface of the cavity.

[0057] The bottom end of the lower mold 1 is provided with a lower blind hole that penetrates into the cavity, the top end of the push rod 13 penetrates the top end of the lower blind hole and extends into the cavity, the push rod 13 is provided with a positioning ring 131 located in the lower blind hole, a lower elastic element 14 is provided between the positioning ring 131 and the top end of the lower blind hole, and the fixed mold seat 62 is provided with a through hole with a diameter smaller than the positioning ring 131, and the bottom end of the push rod 13 penetrates the through hole and slides with it.

[0058] As a component that directly acts on the casting, the top of the ejector pin 13 is kept flush with the cavity in the mold closing state. This design ensures that the ejector pin 13 will not interfere with the filling of the molten metal and the molding of the casting during the casting process. When the mold separation operation is started, the execution ring 74 abuts against the ejector pin 13, providing an upward driving force for the ejector pin 13. Under the action of this driving force, the ejector pin 13 overcomes the elastic force of the lower elastic element 14 and lifts the casting located in the cavity upward in the vertical direction. The accuracy and stability of this lifting action are crucial to prevent the casting from being damaged during the demolding process.

[0059] The lower elastic element 14 can prevent the push rod 13 from being stuck in the lower blind hole, thereby driving the positioning ring 131 to reset.

[0060] An automatic die-casting method for an aluminum shell of an automobile liquid storage dryer, using an automatic die-casting device for an aluminum shell of an automobile liquid storage dryer, comprises the following steps: Step 1: After the upper mold 2 and the lower mold 1 are closed, the valve channel of the valve member 3 is connected to the liquid riser 5 and the cavity; Step 2: inject gas into the holding furnace 4, the molten metal in the riser 5 rises and fills the cavity, and the air pressure in the holding furnace 4 is maintained until the molten metal in the cavity is completely solidified to form a casting; Step 3: release the pressure in the holding furnace 4, and the unsolidified molten metal in the riser 5 flows back to the holding furnace 4. After the mold is separated, the valve channel of the valve member 3 is closed, and the casting is taken out.

[0061] The above embodiments only express one or several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the protection scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. An automated die-casting device for an aluminum housing of an automobile liquid storage dryer, comprising a lower die and an upper die, wherein a heat preservation furnace is provided at the bottom of the lower die, a liquid injection port is provided in the lower die for the metal liquid to enter the cavity, and a liquid riser is provided in the heat preservation furnace, the top of the liquid riser being connected to the liquid injection port, characterized in that: A valve member linked to the upper mold is provided between the liquid riser and the liquid injection port, the valve member having a closable gate, the two ends of the gate being respectively connected to the liquid riser and the liquid injection port, the gate being opened after the mold is closed, and being closed after the mold is separated; The gate has fixed channels distributed along the circumference of the riser and movable channels that can communicate with the fixed channels. When the movable channels are in a connected state with the fixed channels, the gate is opened; when the movable channels are in a non-connected state with the fixed channels, the gate is closed. The fixed channel and the movable channel both extend in a direction parallel to the axis of the riser tube, and the molten metal passes through the fixed channel and the movable channel in sequence from the riser tube and then enters the mold cavity.

2. The automatic die-casting device for aluminum housing of automobile liquid storage dryer according to claim 1, characterized in that: The valve component includes a fixed seat and a movable seat, the fixed seat is fixedly arranged at the top of the liquid riser, the fixed channels are distributed in the fixed seat, the movable seat is rotatably arranged at the top of the fixed seat and forms a linkage with the upper mold, and the movable channels are distributed on the movable seat; when the upper mold and the lower mold are separated, the movable seat rotates relative to the fixed seat to make the movable channels and the fixed channels staggered.

3. The automatic die-casting device for aluminum housing of automobile liquid storage dryer according to claim 2, characterized in that: The fixed seat has a lower recess extending into the riser tube, and the fixed channel is distributed in the lower recess along the circumference of the riser tube. The movable seat has an upper recess extending into the inner cavity of the lower recess and loosely matched with the lower recess, and the movable channel is distributed in the upper recess along the circumference of the riser tube.

4. The automatic die-casting device for aluminum housing of automobile liquid storage dryer according to claim 3, characterized in that: A linkage assembly for linking the upper mold and the movable seat is provided in the lower mold. The linkage assembly includes a trigger member arranged at the top of the upper mold and capable of abutting against the upper mold, and an actuator arranged at the bottom of the upper mold and transmission connected to the movable seat. When the upper mold abuts against the trigger member and the mold is closed, the actuator can drive the movable seat to rotate on the fixed seat to connect the fixed channel and the movable channel.

5. The automatic die-casting device for aluminum housing of automobile liquid storage dryer according to claim 4, characterized in that: The trigger member includes a trigger rod that slides longitudinally through the lower mold, the trigger rod is elastically connected to the lower mold, and in an initial state, the top end of the trigger rod is higher than the mating surface of the lower mold; the actuator includes an actuator ring that is slidably arranged at the bottom of the lower mold along the axial direction of the liquid riser, and the trigger rod is connected to the actuator ring; the inner circumference of the actuator ring is provided with an actuator cylinder extending downward, and the actuator cylinder is provided with an arc-shaped driving groove coaxial with the actuator cylinder, and the outer circumferential surface of the movable part is provided with a guide pin that slides with the arc-shaped driving groove.

6. The automatic die-casting device for aluminum housing of automobile liquid storage dryer according to claim 4, characterized in that: A conducting tube extending downward into the upper recess is arranged at the bottom end of the liquid injection port, and a sealing ring coaxial with the conducting tube is arranged on the outer circumferential surface of the conducting tube, and the sealing ring abuts against the top end of the movable seat.

7. The automatic die-casting device for aluminum housing of automobile liquid storage dryer according to claim 5, characterized in that: The lower mold is also provided with a push rod that slides through the lower mold in the vertical direction. In the closed mold state, the top of the push rod is flush with the cavity. In the open mold state, the execution ring abuts the push rod and makes the top of the push rod higher than the bottom surface of the cavity.

8. An automated die-casting method for an aluminum housing of an automobile liquid storage dryer, characterized in that: The automatic die-casting device for aluminum housing of an automobile liquid storage dryer according to any one of claims 1 to 7 comprises the following steps: Step 1: After the upper mold and the lower mold are closed, the valve channel of the valve component is connected to the liquid riser and the cavity; Step 2: Inject gas into the holding furnace, so that the molten metal in the riser rises and fills the cavity, and the gas pressure in the holding furnace is maintained until the molten metal in the cavity is completely solidified to form a casting; Step three, release the pressure in the holding furnace, and the unsolidified molten metal in the riser flows back to the holding furnace. After the mold is separated, the valve channel of the valve part is closed, and the casting is taken out.

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