Aluminum alloy wheel hub liquid casting machine

Abstract

The application discloses an aluminum alloy wheel hub liquid casting machine table, when a side mold is moved to a set position under the action of a driving mechanism, a cooling channel of the side mold and a second cooling cavity of a workbench are sealed through a buoyancy sealing structure, when a top mold is moved to a set position under the action of a lifting mechanism, a top opening mechanism at the upper end of the cooling channel of the side mold opens a one-way valve in a water outlet channel of the top mold, a water cooling cycle is established between a cooling circulation system, a water inlet pipe, a first cooling chamber, the water outlet channel, the cooling channel, a second cooling chamber, a drain pipe and the cooling circulation system, the casting and forming speed of the aluminum alloy wheel hub is realized, the leakage of water in the upper mold during the lifting process can be avoided through the arrangement of the one-way valve, the water in the side mold can be moved after being emptied, and the liquefied aluminum alloy in a transfer furnace can enter the mold under the pressurization of a gas injection pressurizing port, the air content in the liquefied aluminum alloy can be reduced, and the formed aluminum alloy wheel hub has high toughness and high strength.

Description

Technical Field

[0001] The present invention relates to the technical field of wheel hub processing, in particular to a liquefaction casting machine for an aluminum alloy wheel hub. Background Art

[0002] The wheel hub is an automotive component mounted on an axle, supporting the tire. The aluminum alloy wheel manufacturing process involves: melting and refining - casting - cap cutting - punching and deburring - heat treatment - shot blasting - finishing - automated drilling - leak testing - painting - and packaging. The casting process requires an aluminum alloy wheel liquefaction casting machine.

[0003] Existing aluminum alloy wheel liquefaction casting machines include a machine base, a workbench mounted on the base, a mold mounted on the workbench, and a transfer furnace located below the workbench and filled with liquefied aluminum alloy. The transfer furnace is equipped with an air injection and pressurization port that allows air to be squeezed into the mold. The mold includes a bottom mold with a pouring port mounted on the workbench, several side molds, a drive mechanism between the side molds and the workbench, a top mold, and a lifting mechanism between the top mold and the machine base. A wheel hub cavity is formed between the bottom mold, several side molds, and the top mold. For example, patent publication number CN202804141U, published on March 20, 2013, discloses "Low-pressure Casting Equipment for Aluminum Alloy Wheels."

[0004] However, when the liquefied aluminum alloy is formed in the mold, it is formed by natural cooling, which leads to a relatively slow casting speed. At the same time, the temperature of the mold will increase after completing the low-pressure casting, which will eventually affect the casting efficiency of the aluminum alloy wheel hub. Summary of the Invention

[0005] The purpose of the present invention is to provide an aluminum alloy wheel hub liquefaction casting machine, which accelerates the forming speed of the wheel hub by cooling the mold and improves the casting efficiency of the wheel hub.

[0006] The above technical objectives of the present invention are achieved through the following technical solutions: an aluminum alloy wheel hub liquefaction casting machine, comprising a machine base, a workbench arranged on the machine base, a mold arranged on the workbench, a transfer furnace arranged below the workbench and filled with liquefied aluminum alloy, the transfer furnace is provided with an injection pressure port for injecting liquefied aluminum alloy into the mold by air extrusion, the mold comprises a bottom mold arranged on the workbench and having a pouring port, two semicircular side molds, a driving mechanism arranged between the side molds and the workbench, a top mold, and a lifting mechanism arranged between the top mold and the machine base, a wheel hub cavity can be formed between the bottom mold, the two side molds and the top mold, the edge of the top mold is provided with an annular ring that presses against the upper surfaces of the two side molds when the mold is closed, a first cooling chamber is provided in the top mold, and a contact with the first cooling chamber is provided on the top mold. A water inlet pipe communicating with the cavity, a plurality of water outlet channels communicating with the first cooling cavity are arranged on the annular ring, and a one-way valve for closing the water outlet channel in a natural state is arranged in the water outlet channel; a cooling channel communicating with the upper and lower surfaces of the side mold is arranged at the water outlet channel corresponding to the side mold, and the upper end of the cooling channel is provided with a top-opening structure for opening the one-way valve when the mold is in a closed state and preventing water leakage at the connection; a second cooling cavity in an annular shape communicating with the lower end of the cooling channel is arranged in the workbench, a drain pipe communicating with the second cooling cavity is arranged on the side of the workbench, and a buoyancy sealing structure is arranged between the side mold and the workbench to prevent water leakage at the connection between the cooling channel and the second cooling cavity when the side mold moves to a predetermined position; a cooling circulation system is arranged between the water inlet pipe and the drain pipe, which extracts water from the drain pipe, cools it, and transports it to the water inlet pipe.

[0007] By adopting the above scheme, when the side mold moves to the set position under the action of the driving mechanism, the cooling channel of the side mold and the second cooling chamber of the workbench are sealed by a buoyancy sealing structure. When the top mold is moved to the set position under the action of the lifting mechanism, the top opening mechanism at the upper end of the cooling channel of the side mold opens the one-way valve in the water outlet channel of the top mold, and establishes a water cooling cycle between the cooling circulation system-water inlet pipe-first cooling chamber-water outlet channel-cooling channel-second cooling chamber-drain pipe-cooling circulation system to achieve the casting speed of the aluminum alloy wheel hub with added blocks; and the setting of the one-way valve can prevent the water in the upper mold from leaking during the lifting process, and the water in the side mold can be moved after being emptied; at the same time, the liquefied aluminum alloy in the transfer furnace enters the mold under the pressure of the gas injection pressure port, which can reduce the air content in the liquefied aluminum alloy, so that the formed aluminum alloy wheel hub has high toughness and high strength.

[0008] The present invention is further configured as follows: the first cooling chamber includes a first cavity connected to multiple water outlet channels and close to the bottom of the top mold, a second cavity connected to the water inlet pipe and within the range of the first cavity, and the bottom of the second cavity is connected to the first cavity.

[0009] Through the above scheme, in the cooling process of the cooling water in the first cooling chamber to the hub, the cooling water enters the second cavity from the water inlet pipe, enters the first cavity from the bottom of the second cavity, and enters the water outlet channel from the first cavity, so that the cooling water in the first cooling chamber is quickly discharged to ensure the water circulation replacement efficiency in the second cooling chamber.

[0010] Further provided by the application is that the water outlet channel is provided with a partition plate with a central hole, the partition plate is provided with a plurality of water outlet holes arranged in a circumferential array, the one-way valve comprises a valve plate arranged at the upper end of the partition plate, a valve rod arranged on the valve plate and penetrating through the central hole, a anti-loosening nut threadedly connected to the lower end of the valve rod, a compression spring sleeved on the valve rod and abutting against the partition plate and the anti-loosening nut, and a first sealing ring arranged at the edge of the lower surface of the valve plate and abutting against the partition plate and the valve plate under the action of the compression spring to close the water outlet holes.

[0011] Through the above scheme, the first sealing ring abuts against the partition plate and the valve plate under the action of the compression spring to close the water outlet holes, so that the water in the first cooling chamber is not leaked and discharged from the water outlet channel during the lifting of the top die; meanwhile, during the downward movement of the top die to the predetermined position, the top opening structure can overcome the elastic force of the compression spring by applying force to the anti-loosening nut to open the water outlet channel.

[0012] Further provided by the application is that the upper surface of the side die is provided with a threaded hole communicated with the cooling channel, the top opening structure comprises a connecting pipe threadedly connected at the lower end to the threaded hole and embedded at the upper end in the water outlet channel, a plurality of second sealing rings arranged at the circumferential side of the connecting pipe and abutting against the inner wall of the water outlet channel, and a top rod arranged at one end on the inner wall of the connecting pipe and used for opening the one-way valve at the other end.

[0013] Through the above scheme, during the downward movement of the top die to the predetermined position, the top rod can open the one-way valve to open the water outlet channel; meanwhile, the second sealing rings on the upper surface of the connecting pipe can seal the connection to prevent water leakage.

[0014] The present invention is further configured as follows: the upper surface of the workbench is provided with a plurality of connecting channels corresponding to the cooling channels and connected to the second cooling chamber, the inner diameter of the connecting channel is larger than the inner diameter of the cooling channel, the buoyancy sealing structure includes an annular plate arranged in the second cooling chamber, a plurality of through pipes arranged on the upper surface of the annular plate and embedded in the connecting channel, a first float arranged on the annular plate, a third sealing ring arranged on the upper surface of the through pipe and pressed against the lower surface of the side mold and surrounding the cooling channel under the action of the first float, a fourth sealing ring arranged on the annular plate and pressed against the upper surface of the second cooling chamber and surrounding the connecting channel under the action of the first float; when the annular plate and the first float are not floating, the upper end of the through pipe is in the connecting channel.

[0015] By adopting the above scheme, in the process of constructing the water circulation, the water level in the second cooling chamber will first rise slowly. At this time, the water generates buoyancy on the first float, causing the annular ring and the through-tube to move upward, so that the third sealing ring is pressed against the lower surface of the side mold and surrounds the cooling channel, and the fourth sealing ring is pressed against the upper surface of the second cooling chamber and surrounds the connecting channel to achieve sealing of the connection; at the same time, when the mold needs to be opened, the water supply from the water inlet pipe is stopped. When the water in the second cooling chamber is discharged and the water level is lowered, the through-tube moves downward and enters the connecting channel, eliminating the friction with the side mold and avoiding affecting the movement of the side mold.

[0016] The present invention is further configured as follows: the lower end of the cooling channel is in a stepped shape with a smaller upper portion and a larger lower portion; a plurality of connecting channels corresponding to the cooling channels and connected to the second cooling chamber are provided on the upper surface of the workbench; the buoyancy sealing structure includes an annular baffle arranged in the connecting channel and having a plurality of through holes distributed in a circumferential array, an annular sleeve arranged on the annular baffle, an annular sealing gasket arranged on the circumferential side of the annular sleeve, a limiting rod arranged on the lower surface of the annular sleeve and passing through the through holes, and a second float connected to the lower ends of the plurality of limiting rods; when the lower surface of the annular sleeve abuts against the annular baffle, the annular sleeve is embedded in the cooling channel; when the annular sleeve moves upward to the limit state under the action of the second float, the upper surface of the annular sleeve abuts against the stepped surface at the lower end of the cooling channel; and the annular sealing gasket covers the connecting gap between the workbench and the side mold after the abutment.

[0017] By adopting the above scheme, in the process of constructing the water circulation, the water level in the second cooling chamber will slowly rise first, at this time the water generates buoyancy on the second floating body, so that the annular sleeve moves upward to be embedded into the cooling channel, when the annular sleeve moves upward to the limit state under the action of the second floating body, the upper surface of the annular sealing gasket covers the connecting gap between the workbench and the side mold after abutting, so as to realize sealing of the connecting part; at the same time, when it is needed to open the mold, the water supply from the water inlet pipe is stopped, when the water level in the second cooling chamber is lowered due to water discharge, the annular sleeve moves downward and enters the connecting channel, so as to avoid affecting the movement of the side mold.

[0018] Further, the cooling circulation system comprises a circulating water tank, a backwater hose connected between the circulating water tank and the drain pipe, a water inlet hose connected between the circulating water tank and the water inlet pipe, a water pump arranged between the circulating water tank and the water inlet hose, a water cooler, and a condenser connected with the water cooler and immersed in the circulating water tank.

[0019] By adopting the above scheme, the water discharged from the drain pipe enters the circulating water tank and is then delivered into the water inlet pipe by the water pump to form a circulation, and the water cooler and the condenser are arranged to cool and lower the temperature of the water in the circulating water tank, so as to ensure the cooling and temperature-lowering effect on the mold.

[0020] Further, the lifting mechanism comprises a base plate arranged above the base, a plurality of telescopic rods having one end connected to the base plate and the other end penetrating through the base and being connected to the top mold, and a lifting cylinder arranged between the base and the base plate, the top portions of the front side and the rear side of the base are symmetrically provided with fume hoods, the fume hoods are hingedly provided with cover plates for adjusting the air inlet range, and a linkage mechanism for gradually increasing the air inlet range during the lifting of the base plate is arranged between the base plate and the two cover plates.

[0021] By adopting the above scheme, some fume will be generated during the casting and forming of the aluminum alloy hub, and the fume will be discharged along the tiny gap at the connecting part of the mold, at this time the fume can be sucked by the fume hood, and during the opening of the mold, the top mold is first moved upward, at this time the fume in a range will appear, the linkage mechanism is arranged between the base plate and the cover plates of the lifting mechanism, so that the cover plates can be opened to increase the suction range of the fume hood, so as to achieve the suction effect on the fume.

[0022] Further, the air inlet of the fume hood comprises a first opening part downward, a second opening part connected with the first opening part at the lower end and inclined upward toward the direction away from the middle part of the base, and the cover plate can completely cover the second opening part during downward rotation and gradually open the second opening part during upward rotation.

[0023] By adopting the above solution, the first opening can be set to extract the smoke and dust during the aluminum alloy wheel hub forming process; the large-scale smoke and dust generated during the mold opening process can be suctioned through the second opening when the cover is opened.

[0024] The present invention is further configured as follows: the linkage mechanism includes a plurality of directional wheels arranged on the top of the smoke hood, a steel cable with one end arranged on the base plate and the other end passing around the directional wheels and connected to the cover plate; when the lifting mechanism drives the top mold to move downward so that the mold is in a closed state, the cover plate is just in a state of covering the second opening.

[0025] By adopting the above solution, when the lifting mechanism drives the top mold to move upward, the base plate moves upward, and the cover plate can be gradually opened by setting the directional wheels and steel cables to increase the suction range of the smoke hood. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a structural diagram of Example 1;

[0027] Figure 2 It is a schematic diagram of the partial structure of the workbench and mold in Example 1;

[0028] Figure 3 yes Figure 2 A local enlarged view at point A;

[0029] Figure 4 yes Figure 2 A partial enlarged view of position B in the middle;

[0030] Figure 5 is a schematic structural diagram of the cooling circulation system in Example 1;

[0031] Figure 6 It is a schematic diagram of the local structure of the buoyancy sealing structure in Example 2.

[0032] Figure 3

[0033] Figure numerals: 1, machine base; 2, workbench; 21, second cooling chamber; 22, drain pipe; 23, buoyancy sealing structure; 231, annular plate; 232, through pipe; 233, first float; 234, third sealing ring; 235, fourth sealing ring; 236, annular partition; 237, annular sleeve; 238, annular sealing gasket; 239, limiting rod; 2310, second float; 24, connecting channel; 31, bottom mold; 32, side mold; 321, cooling channel; 322, top opening structure; 3221, connecting pipe; 3222, second sealing ring; 3223, ejector rod; 323, threaded hole; 33, driving mechanism; 34, top mold; 341, annular ring; 342, first cooling chamber; 3421, first cavity; 3422 , second cavity; 343, water inlet pipe; 344, water outlet channel; 345, one-way valve; 3451, valve plate; 3452, valve stem; 3453, anti-slip nut; 3454, compression spring; 3455, first sealing ring; 346, partition plate; 3461, center hole; 3462, water outlet; 35, lifting mechanism; 351, base plate; 352, telescopic rod; 353, lifting cylinder; 4, transfer furnace; 41, gas injection and pressurization port; 5, cooling circulation system; 51, circulating water tank; 52, return hose; 53, water inlet hose; 54, water pump; 55, water chiller; 56, condenser; 6, smoke hood; 61, cover plate; 62, first opening; 63, second opening; 7, linkage mechanism; 71, directional wheel; 72, steel cable. DETAILED DESCRIPTION

[0034] The present invention will be further described in detail below with reference to the accompanying drawings.

[0035] Example 1: A liquefied casting machine for an aluminum alloy wheel hub, such as Figure 1 and Figure 2 As shown, the mold comprises a base 1, a workbench 2 mounted on the base 1, a mold mounted on the workbench 2, and a transfer furnace 4 located below the workbench 2 and filled with liquefied aluminum alloy. The transfer furnace 4 is provided with an air injection and pressurization port 41 for injecting the liquefied aluminum alloy into the mold by extruding air. The mold comprises a bottom mold 31 with a pouring port, mounted on the workbench 2, two semicircular side molds 32, a drive mechanism 33 disposed between the side molds 32 and the workbench 2, a top mold 34, and a lifting mechanism 35 disposed between the top mold 34 and the base 1. A hub cavity is formed between the bottom mold 31, the two side molds 32, and the top mold 34.

[0036] like Figure 1 and Figure 2As shown, the edge of the top mold 34 is provided with an annular ring 341 that presses against the upper surfaces of the two side molds 32 when the mold is closed. A first cooling chamber 342 is provided within the top mold 34. A water inlet pipe 343 is provided on the top mold 34, which communicates with the first cooling chamber 342. The annular ring 341 is provided with multiple water outlet channels 344 that communicate with the first cooling chamber 342. The water outlet channels 344 are provided with one-way valves 345 that seal the water outlet channels 344 in a natural state. Cooling channels 321 are provided at the corresponding locations of the side molds 32, connecting the upper and lower surfaces of the side molds 32. The upper end of the cooling channel 321 is provided with a push-open structure 322 that pushes open the one-way valve 345 when the mold is closed and prevents water leakage at the connection. The workbench 2 is provided with an annular second cooling chamber 21 that communicates with the lower end of the cooling channel 321. A drainage pipe 22 is provided on the side of the workbench 2, communicating with the second cooling chamber 21. A buoyant seal 23 is provided between the side mold 32 and the workbench 2 to prevent water leakage at the connection between the cooling channel 321 and the second cooling chamber 21 when the side mold 32 is moved to a predetermined position. A cooling circulation system 5 is provided between the water inlet pipe 343 and the drainage pipe 22, which draws water from the drainage pipe 22, cools it, and then transports it to the water inlet pipe 343.

[0037] like Figure 2 As shown, the first cooling chamber 342 includes a first cavity 3421 that is connected to multiple water outlet channels 344 and close to the bottom of the top mold 34, and a second cavity 3422 that is connected to the water inlet pipe 343 and is within the range of the first cavity 3421. The bottom of the second cavity 3422 is connected to the first cavity 3421.

[0038] like Figure 2 and Figure 3 As shown, a partition plate 346 with a center hole 3461 is provided in the water outlet channel 344, and a plurality of water outlet holes 3462 distributed in a circular array are provided on the partition plate 346. The one-way valve 345 includes a valve plate 3451 arranged at the upper end of the partition plate 346, a valve stem 3452 arranged on the valve plate 3451 and passing through the center hole 3461, an anti-slip nut 3453 threadedly connected to the lower end of the valve stem 3452, a compression spring 3454 sleeved on the valve stem 3452 and pressed between the partition plate and the anti-slip nut 3453, and a first sealing ring 3455 arranged on the edge of the lower surface of the valve plate 3451. Under the action of the compression spring 3454, the first sealing ring 3455 is pressed between the partition plate 346 and the valve plate 3451 to close the water outlet hole 3462.

[0039] like Figure 2 and Figure 3As shown, a threaded hole 323 communicating with the cooling channel 321 is provided on the upper surface of the side mold 32, and the top opening structure 322 includes a connecting pipe 3221 whose lower end is threadedly connected to the threaded hole 323 and whose upper end is used to be embedded in the water outlet channel 344, a plurality of second sealing rings 3222 arranged on the circumference of the connecting pipe 3221 and pressed against the inner wall of the water outlet channel 344, and a push rod 3223 whose one end is arranged on the inner wall of the connecting pipe 3221 and the other end is used to push open the one-way valve 345.

[0040] like Figure 2 and Figure 4 As shown, a plurality of connecting channels 24 corresponding to the cooling channels 321 and connected to the second cooling chamber 21 are provided on the upper surface of the workbench 2. The inner diameter of the connecting channel 24 is larger than the inner diameter of the cooling channel 321. The buoyancy sealing structure 23 includes an annular plate 231 arranged in the second cooling chamber 21, a plurality of through-tubes 232 arranged on the upper surface of the annular plate 231 and embedded in the connecting channel 24, a first float 233 arranged on the annular plate 231, a third sealing ring 234 arranged on the upper surface of the through-tube 232 and pressed against the lower surface of the side mold 32 and surrounding the cooling channel 321 under the action of the first float 233, and a fourth sealing ring 235 arranged on the annular plate 231 and pressed against the upper surface of the second cooling chamber 21 and surrounding the connecting channel 24 under the action of the first float 233. When the annular plate 231 and the first float 233 are not floating, the upper end of the through-tube 232 is in the connecting channel 24.

[0041] like Figure 1 、 Figure 2 and Figure 5 As shown, the cooling circulation system 5 includes a circulating water tank 51, a return hose 52 connecting the drain pipe 22 and the circulating water tank 51, a water inlet hose 53 connecting the water inlet pipe 343 and the circulating water tank 51, a water pump 54 arranged between the circulating water tank 51 and the water inlet hose 53, a water cooler 55, and a condenser 56 connected to the water cooler 55 and immersed in the circulating water tank 51.

[0042] like Figure 1 As shown, the lifting mechanism 35 includes a base plate 351 arranged above the machine base 1, a plurality of telescopic rods 352 with one end connected to the base plate 351 and the other end passing through the machine base 1 and connected to the top mold 34, and a lifting cylinder 353 arranged between the base and the base plate 351. Smoke hoods 6 are symmetrically arranged on the top of the front and rear sides of the machine base 1. A cover plate 61 for adjusting the air inlet range is hingedly provided at the air inlet of the smoke hood 6. A linkage mechanism 7 is provided between the base plate 351 and the two cover plates 61 to gradually increase the air inlet range as the base plate 351 rises.

[0043] like Figure 1As shown, the air inlet of the fume hood 6 includes a first opening part 62 downward, a second opening part 63 connected with the first opening part 62 at the lower end and inclined upward at the upper end toward the direction away from the middle part of the base 1, and the cover plate 61 can completely cover the second opening part 63 during downward rotation and gradually open the second opening part 63 during upward rotation. The linkage mechanism 7 includes a plurality of directional wheels 71 arranged at the top of the fume hood 6, a steel cable 72 arranged at one end on the base plate 351 and connected at the other end on the cover plate 61 after passing around the directional wheels 71, and when the lifting mechanism 35 drives the top mold 34 to move downward so that the mold is in a closed state, the cover plate 61 is just in a state of covering the second opening part 63.

[0044] Effect: When the side mold 32 moves to the set position under the action of the driving mechanism 33, the cooling channel 321 of the side mold 32 and the second cooling cavity of the workbench 2 are sealed by the buoyancy sealing structure 23. When the top mold 34 moves to the set position under the action of the lifting mechanism 35, the top opening mechanism at the upper end of the cooling channel 321 opens the one-way valve 345 in the water outlet channel 344 of the top mold 34, and a water cooling cycle is established between the cooling circulation system 5, the water inlet pipe 343, the first cooling chamber 342, the water outlet channel 344, the cooling channel 321, the second cooling chamber 21, the drain pipe 22 and the cooling circulation system 5, so as to increase the casting and forming speed of the aluminum alloy wheel hub. The setting of the one-way valve 345 can avoid the leakage of water in the top mold during lifting, and the water in the side mold 32 can be moved after being emptied. At the same time, the liquefied aluminum alloy in the transfer furnace 4 enters the mold under the pressure of the gas injection pressure port 41, which can reduce the air content in the liquefied aluminum alloy, so that the formed aluminum alloy wheel hub has high toughness and high strength.

[0045] The first sealing ring 3455 is pressed between the partition plate 346 and the valve plate 3451 under the action of the compression spring 3454 and achieves the sealing of the water outlet hole 3462, so that the water in the first cooling chamber 342 does not leak out of the water outlet passage 344 during the lifting of the top die 34; at the same time, during the downward movement of the top die 34 to the predetermined position, the top opening structure 322 can overcome the elastic force of the compression spring 3454 by applying force to the anti-loose nut 3453, so as to open the water outlet passage 344. During the downward movement of the top die 34 to the predetermined position, the top opening structure 322 can open the one-way valve 345 to open the water outlet passage 344; at the same time, the second sealing ring 3222 on the upper surface of the connecting pipe 3221 can seal the connection to prevent water leakage. During the water circulation process, the water level in the second cooling chamber 21 will slowly rise, at which time the water exerts a buoyant force on the first float 233, causing the annular plate 231 and the through pipe to move upward, so that the third sealing ring 234 is pressed against the lower surface of the side die 32 and surrounds the cooling passage 321, and the fourth sealing ring 235 is pressed against the upper surface of the second cooling chamber 21 and surrounds the connecting passage 24, so as to seal the connection; at the same time, water supply from the water inlet pipe 343 is stopped when the mold needs to be opened, and when the water level in the second cooling chamber 21 decreases due to water discharge, the through pipe moves downward into the connecting passage 24, eliminating the friction force with the side die 32 and avoiding affecting the movement of the side die 32.

[0046] Some smoke will be generated during the casting process of the aluminum alloy wheel hub, and the smoke will be discharged along the tiny gap of the mold connection. At this time, the smoke can be sucked through the smoke hood 6, and at the same time, during the opening of the mold, the top die 34 is first moved upward, at which time a range of smoke will be generated. The linkage mechanism 7 is arranged between the base plate 351 and the cover plate 61 of the lifting mechanism 35, so that the cover plate 61 can be opened to increase the suction range of the smoke hood 6, so as to achieve the suction effect of the smoke.

[0047] Embodiment 2: An aluminum alloy wheel hub liquid casting machine, like Figure 2 、 Figure 4 and Figure 6As shown, the difference from Example 1 is that the lower end of the cooling channel 321 is stepped, with the upper end being smaller and the lower end being larger. The upper surface of the workbench 2 is provided with a plurality of connecting channels 24 corresponding to the cooling channels 321 and connected to the second cooling chamber 21. The buoyancy sealing structure 23 includes an annular baffle 236 provided in the connecting channel 24 and having a plurality of through holes distributed in a circumferential array, an annular sleeve 237 provided on the annular baffle 236, an annular sealing gasket 238 provided on the circumferential side of the annular sleeve 237, and an annular sealing gasket 239 provided on the annular sleeve 230. 7, a limiting rod 239 is provided on the lower surface of the annular sleeve 237 and passes through the through hole, and a second float 2310 is connected to the lower ends of multiple limiting rods 239. When the lower surface of the annular sleeve 237 abuts against the annular partition 236, the annular sleeve 237 is embedded in the cooling channel 321. When the annular sleeve 237 moves upward to the limit state under the action of the second float 2310, the upper surface of the annular sleeve 237 abuts against the stepped surface at the lower end of the cooling channel 321, and the annular sealing gasket 238 covers the connecting gap between the workbench 2 and the side mold 32 after the abutment.

[0048] Implementation effect: During the process of constructing the water circulation, the water level in the second cooling chamber 21 will first rise slowly. At this time, the water generates buoyancy on the second float 2310, causing the annular sleeve 237 to move upward and be embedded in the cooling channel 321. When the annular sleeve 237 moves upward to the limit state under the action of the second float 2310, the upper surface of the annular sleeve 237 contacts the stepped surface at the lower end of the cooling channel 321, and the annular sealing gasket 238 covers the connection gap between the workbench 2 and the side mold 32 after the contact, so as to achieve sealing of the connection; at the same time, when the mold needs to be opened, the water supply from the water inlet pipe 343 is stopped. When the water in the second cooling chamber 21 is discharged and the water level is lowered, the annular sleeve 237 moves downward and enters the connecting channel 24 to avoid affecting the movement of the side mold 32.

[0049] This specific embodiment is merely an explanation of the present invention and is not intended to limit the present invention. After reading this specification, those skilled in the art may make non-creative modifications to this embodiment as needed. However, as long as such modifications are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A liquefied casting machine for an aluminum alloy wheel hub, comprising a machine base (1), a workbench (2) arranged on the machine base (1), a mold arranged on the workbench (2), and a transfer furnace (4) arranged below the workbench (2) and filled with liquefied aluminum alloy, wherein the transfer furnace (4) is provided with an air injection pressurization port (41) for injecting the liquefied aluminum alloy into the mold by air extrusion, the mold comprising a bottom mold (31) arranged on the workbench (2) and having a pouring port, two semicircular side molds (32), a driving mechanism (33) arranged between the side molds (32) and the workbench (2), a top mold (34), and a lifting mechanism (35) arranged between the top mold (34) and the machine base (1), wherein a wheel hub cavity can be formed between the bottom mold (31), the two side molds (32) and the top mold (34), and the machine base (1), wherein: The edge of the top mold (34) is provided with an annular ring (341) which presses against the upper surfaces of the two side molds (32) when the mold is closed. A first cooling chamber (342) is provided in the top mold (34). A water inlet pipe (343) communicating with the first cooling chamber (342) is provided on the top mold (34). A plurality of water outlet channels (344) communicating with the first cooling chamber (342) are provided on the annular ring (341). A one-way valve (345) for closing the water outlet channels (344) in a natural state is provided in the water outlet channels (344). A cooling channel (321) communicating with the upper and lower surfaces of the side mold (32) is provided at a position corresponding to the water outlet channel (344). The upper end of the cooling channel (321) is provided at the mold. A push-open structure (322) is provided for pushing open the one-way valve (345) when in a closed state and preventing water leakage at the connection; a second cooling chamber (21) in an annular shape and communicating with the lower end of the cooling channel (321) is provided in the workbench (2); a drainage pipe (22) communicating with the second cooling chamber (21) is provided on the side of the workbench (2); a buoyancy sealing structure (23) is provided between the side mold (32) and the workbench (2) for preventing water leakage at the connection between the cooling channel (321) and the second cooling chamber (21) when the side mold (32) moves to a predetermined position; and a cooling circulation system (5) is provided between the water inlet pipe (343) and the drainage pipe (22) for pumping water from the drainage pipe (22), cooling the water, and then transporting the water to the water inlet pipe (343).

2. The aluminum alloy wheel liquefaction casting machine according to claim 1, characterized in that: The first cooling chamber (342) comprises a first cavity (3421) communicating with a plurality of water outlet channels (344) and close to the bottom of the top mold (34), and a second cavity (3422) communicating with the water inlet pipe (343) and located within the range of the first cavity (3421); the bottom of the second cavity (3422) is connected to the first cavity (3421).

3. The aluminum alloy wheel liquefaction casting machine according to claim 1, characterized in that: The water outlet channel (344) is provided with a partition plate (346) having a central hole (3461), and the partition plate (346) is provided with a plurality of water outlet holes (3462) distributed in a circumferential array. The one-way valve (345) includes a valve plate (3451) provided on the upper end of the partition plate (346), a valve stem (3452) provided on the valve plate (3451) and passing through the central hole (3461), and a valve threadedly connected to the valve stem (3451). 2) an anti-slip nut (3453) at the lower end, a compression spring (3454) sleeved on the valve stem (3452) and pressed tightly between the partition plate and the anti-slip nut (3453), and a first sealing ring (3455) arranged on the edge of the lower surface of the valve plate (3451), wherein the first sealing ring (3455) is pressed tightly between the partition plate (346) and the valve plate (3451) under the action of the compression spring (3454) to close the water outlet hole (3462).

4. The aluminum alloy wheel liquefaction casting machine according to claim 3, characterized in that: The upper surface of the side mold (32) is provided with a threaded hole (323) communicating with the cooling channel (321); the push-opening structure (322) comprises a connecting pipe (3221) whose lower end is threadedly connected to the threaded hole (323) and whose upper end is used to be embedded in the water outlet channel (344); a plurality of second sealing rings (3222) arranged on the circumference of the connecting pipe (3221) and pressed against the inner wall of the water outlet channel (344); and a push rod (3223) having one end arranged on the inner wall of the connecting pipe (3221) and the other end used to push open the one-way valve (345).

5. The aluminum alloy wheel liquefaction casting machine according to claim 4, characterized in that: The upper surface of the workbench (2) is provided with a plurality of corresponding cooling channels (321) and connecting channels (24) communicating with the second cooling chamber (21), the inner diameter of the connecting channel (24) is larger than the inner diameter of the cooling channel (321), the buoyancy sealing structure (23) comprises an annular plate (231) arranged in the second cooling chamber (21), a plurality of through-tubes (232) arranged on the upper surface of the annular plate (231) and embedded in the connecting channel (24), a first float (233) arranged on the annular plate (231), and a first float (233) arranged on the annular plate (231). A third sealing ring (234) is disposed on the upper surface of the through-tube (232) and pressed against the lower surface of the side mold (32) and surrounding the cooling channel (321) under the action of the first float (233); and a fourth sealing ring (235) is disposed on the annular plate (231) and pressed against the upper surface of the second cooling chamber (21) and surrounding the connecting channel (24) under the action of the first float (233). When the annular plate (231) and the first float (233) are not floating, the upper end of the through-tube (232) is located in the connecting channel (24).

6. The aluminum alloy wheel liquefaction casting machine according to claim 4, characterized in that: The lower end of the cooling channel (321) is in a stepped shape with a smaller upper portion and a larger lower portion. The upper surface of the workbench (2) is provided with a plurality of connecting channels (24) corresponding to the cooling channels (321) and connected to the second cooling chamber (21). The buoyancy sealing structure (23) comprises an annular baffle (236) provided in the connecting channel (24) and having a plurality of through holes distributed in a circumferential array, an annular sleeve (237) provided on the annular baffle (236), an annular sealing gasket (238) provided on the circumferential side of the annular sleeve (237), and a limiting ring (239) provided on the lower surface of the annular sleeve (237) and passing through the through holes. The annular sleeve (237) is provided with a plurality of positioning rods (239) and a second float (2310) connected to the lower ends of the plurality of limiting rods (239). When the lower surface of the annular sleeve (237) contacts the annular partition (236), the annular sleeve (237) is embedded in the cooling channel (321). When the annular sleeve (237) moves upward to the limit state under the action of the second float (2310), the upper surface of the annular sleeve (237) contacts the stepped surface at the lower end of the cooling channel (321). After the annular sealing gasket (238) contacts, it covers the connection gap between the workbench (2) and the side mold (32).

7. The aluminum alloy wheel liquefaction casting machine according to claim 1, characterized in that: The cooling circulation system (5) includes a circulating water tank (51), a return hose (52) connected to a drain pipe (22) and the circulating water tank (51), a water inlet hose (53) connected to a water inlet pipe (343) and the circulating water tank (51), a water pump (54) arranged between the circulating water tank (51) and the water inlet hose (53), a water cooler (55), and a condenser (56) connected to the water cooler (55) and immersed in the circulating water tank (51).

8. The aluminum alloy wheel liquefaction casting machine according to claim 1, characterized in that: The lifting mechanism (35) comprises a base plate (351) arranged above the machine base (1), a plurality of telescopic rods (352) one end of which is connected to the base plate (351) and the other end of which passes through the machine base (1) and is connected to the top mold (34), and a lifting cylinder (353) arranged between the base and the base plate (351). Smoke hoods (6) are symmetrically arranged on the top of the front and rear sides of the machine base (1). A cover plate (61) for adjusting the air inlet range is hingedly arranged at the air inlet of the smoke hood (6). A linkage mechanism (7) is arranged between the base plate (351) and the two cover plates (61) to gradually increase the air inlet range as the base plate (351) rises.

9. The aluminum alloy wheel liquefaction casting machine according to claim 8, characterized in that: The air inlet of the smoke hood (6) comprises a first opening portion (62) facing downward, a second opening portion (63) whose lower end is connected to the first opening portion (62) and whose upper end is inclined upward in a direction away from the middle of the base (1), and the cover plate (61) can completely cover the second opening portion (63) during the downward rotation process and gradually open the second opening portion (63) during the upward rotation process.

10. The aluminum alloy wheel liquefaction casting machine according to claim 9, characterized in that: The linkage mechanism (7) includes a plurality of directional wheels (71) arranged on the top of the smoke hood (6), and a steel cable (72) with one end arranged on the base plate (351) and the other end passing around the directional wheels (71) and connected to the cover plate (61). When the lifting mechanism (35) drives the top mold (34) to move downward so that the mold is in a closed state, the cover plate (61) is just in a state of covering the second opening (63).

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