CN112893807B - Low-pressure casting machine - Google Patents
Low-pressure casting machine Download PDFInfo
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- CN112893807B CN112893807B CN202110098609.7A CN202110098609A CN112893807B CN 112893807 B CN112893807 B CN 112893807B CN 202110098609 A CN202110098609 A CN 202110098609A CN 112893807 B CN112893807 B CN 112893807B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D18/00—Pressure casting; Vacuum casting
- B22D18/04—Low pressure casting, i.e. making use of pressures up to a few bars to fill the mould
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Abstract
The utility model relates to a low pressure casting machine, which comprises a frame, be provided with holding furnace and air compressor machine in the frame, be provided with the stalk in the holding furnace, be provided with adjustment mechanism in the holding furnace, adjustment mechanism includes pressure cylinder body and one-way subassembly, the pressure cylinder body install in the holding furnace and with the holding furnace between form sealed chamber, the stalk penetrates sealed intracavity, one-way subassembly is installed on the pressure cylinder body and is made the one-way inflow of liquid sealed intracavity, the air compressor machine communicates with the inside in sealed chamber. The load of the air compressor is reduced, so that the service life of the air compressor is prolonged; meanwhile, the service life of the casting is prolonged; the service life of the pressure cylinder body is prolonged, and the time for stopping and maintaining the low-pressure casting machine is reduced, so that the production efficiency of the low-pressure casting machine is improved.
Description
Technical Field
The application relates to the technical field of low-pressure casting machines, in particular to a low-pressure casting machine.
Background
The low-pressure casting machine is general equipment for low-pressure casting of aluminum alloy, and can be widely applied to the production of aluminum alloy castings in automobiles, motorcycles, instruments, textile machinery and aerospace industries.
In the related technology, the low-pressure casting machine comprises a frame, wherein a mold, a hydraulic system connected with the mold, a molten pool type heat preservation furnace positioned below the mold, an air compressor and the like are arranged on the frame in a sliding manner, and a liquid lifting pipe communicated with a mold cavity is fixedly arranged in the heat preservation furnace; when an aluminum alloy casting is cast, compressed gas is introduced into the heat preservation furnace by the air compressor, the pressure of the gas acts on the liquid level of the molten aluminum, so that the molten aluminum in the heat preservation furnace is stably filled in a cavity of the mold along the liquid lifting pipe, and the molten aluminum in the cavity is solidified and molded under higher pressure; then the air compressor releases the pressure of the gas in the heat preservation furnace, and the aluminum water which is not solidified in the liquid lifting pipe falls back into the heat preservation furnace under the action of gravity; and the hydraulic system lifts the mold and the formed aluminum alloy casting and separates the aluminum alloy casting, so that the casting of the aluminum alloy casting is completed.
With respect to the related art among the above, the inventors consider that the following drawbacks exist: when the air compressor presses the filtrate in the heat preservation furnace into the cavity, because the volume of the inner cavity of the heat preservation furnace is large, a large amount of compressed gas needs to be introduced into the heat preservation furnace by the air compressor, so that the load of the air compressor is large, the service life of the air compressor is shortened, and the low-pressure casting machine needs to be stopped when the air compressor is maintained or replaced, so that the production efficiency of the low-pressure casting machine is reduced.
Disclosure of Invention
In order to prolong the service life of the air compressor and improve the production efficiency of the low-pressure casting machine, the application provides the low-pressure casting machine.
The application provides a low pressure casting machine adopts following technical scheme:
the low-pressure casting machine comprises a frame, wherein a heat preservation furnace and an air compressor are arranged on the frame, a liquid lifting pipe is arranged in the heat preservation furnace, an adjusting mechanism is arranged in the heat preservation furnace and comprises a pressure cylinder body and a one-way assembly, the pressure cylinder body is installed in the heat preservation furnace and forms a sealed cavity with the heat preservation furnace, the liquid lifting pipe penetrates into the sealed cavity, the one-way assembly is installed on the pressure cylinder body and enables liquid to flow into the sealed cavity in a one-way mode, and the air compressor is communicated with the inside of the sealed cavity.
By adopting the technical scheme, when an aluminum alloy casting is cast, aluminum liquid in the heat preservation furnace enters the sealing cavity between the pressure cylinder body and the heat preservation furnace through the one-way assembly, the air compressor injects compressed gas into the sealing cavity, and because the volume of the pressure cylinder body is smaller than that of the heat preservation furnace, the air pressure in the sealing cavity can be quickly increased and the aluminum liquid is pressed into the liquid lifting pipe, so that the load of the air compressor is reduced, and the service life of the air compressor is prolonged; meanwhile, the aluminum liquid can be tightly pressed into the liquid lifting pipe by the larger air pressure in the sealing cavity, so that the gas content in the casting is reduced, the compactness of the casting is improved, and the service life of the casting is prolonged; because the volume of the pressure cylinder body is smaller, less gas is filled into the pressure cylinder body, so that the aluminum liquid can be pressed into the liquid lifting pipe, the pressure on the pressure cylinder body is smaller, and the stress change of the pressure cylinder body is reduced, thereby prolonging the service life of the pressure cylinder body, reducing the shutdown and maintenance time of the low-pressure casting machine, and improving the production efficiency of the low-pressure casting machine.
Optionally, a liquid inlet groove is formed in the outer side wall of the pressure cylinder body, a liquid outlet groove is formed in the inner side wall of the pressure cylinder body, and a through hole communicated with the liquid outlet groove is formed in the groove side wall of the liquid inlet groove; the one-way assembly comprises a piston column, a plunger rod and a plunger spring, the piston column is slidably mounted in the liquid inlet groove, the plunger rod is slidably mounted in the liquid outlet groove, the plunger spring is mounted on the plunger rod and connected with the side wall of the liquid outlet groove, the plunger rod seals the through hole under the action of the plunger spring, and the piston column is connected with the plunger rod under the pushing of liquid in the heat preservation furnace and pushes the plunger rod to open the through hole.
By adopting the technical scheme, the aluminum liquid in the heat preservation furnace flows into the liquid inlet groove under the action of gravity, the aluminum liquid is contacted with the piston column and pushes the piston column to move, the piston column overcomes the elasticity of the plunger spring and pushes the plunger rod to move, and the plunger rod opens the through hole, so that the aluminum liquid enters the liquid outlet groove through the through hole and flows into the sealing cavity; when the air compressor feeds compressed air into the sealing cavity, the air pressure in the sealing cavity is increased, the air pushes the aluminum liquid to flow back into the liquid outlet groove and reduces the force of the aluminum liquid acting on the piston column, so that the elastic force of the plunger spring pushes the plunger rod to move and the plunger rod closes the through hole, the plunger rod is tightly pressed in the through hole under the action of the air and the plunger spring, the pressure cylinder body keeps one-way circulation, and the air and the aluminum liquid in the sealing cavity can not flow out of the pressure cylinder body.
Optionally, a gas injection channel communicated with the sealed cavity is formed in the side wall of the heat preservation furnace, the gas injection channel is spiral, and the gas injection channel is connected with an air compressor.
By adopting the technical scheme, the temperature of the gas introduced into the pressure cylinder body by the air compressor is lower, so that the temperature of the aluminum liquid in the pressure cylinder body is reduced, the liquidity of the aluminum liquid after the aluminum liquid enters the liquid lifting pipe is reduced, and flaws easily exist in a casting, so that the quality of the casting is reduced, the heat preservation furnace needs to continuously heat the aluminum liquid, and the energy consumption of the low-pressure casting machine is increased; the gas injection passageway spiral encircles the heat preservation stove, and the air compressor machine lets in the gas injection passageway and can constantly absorb the heat that the heat preservation stove distributed out, makes the temperature of gas rise to can reduce the difference in temperature between gas and the aluminium liquid, reduce the heat preservation stove and carry out the frequency of heating to aluminium liquid, thereby reduced the energy consumption of low pressure casting machine.
Optionally, an air inlet channel communicated with the air injection channel is formed in the upper wall of the pressure cylinder body; the groove side wall of the liquid outlet groove is provided with a sliding groove communicated with the air inlet channel, the plunger rod is installed in the sliding groove in a sliding mode, the plunger spring is connected with the groove bottom of the sliding groove, and the plunger rod seals the through hole under the action of the air compressor and the plunger spring.
By adopting the technical scheme, the air introduced into the air injection channel by the air compressor enters the sealing cavity through the air inlet channel, the air inlet channel is positioned on the upper wall of the pressure cylinder body, and the probability of the aluminum liquid entering the air inlet channel can be reduced after the aluminum liquid enters the pressure cylinder body, so that the probability of the aluminum liquid blocking the air inlet channel is reduced; after the air compressor injects gas into the sealing cavity, the gas enters the sliding groove and acts on the plunger rod, so that the plunger rod seals the through hole under the action of the gas and the plunger spring, the sensitivity of the plunger rod is increased, and the probability that the aluminum liquid in the sealing cavity flows back to the holding furnace again is reduced.
Optionally, a sealing element is arranged on the side wall of the pressure cylinder body, the sealing element includes a sealing block, a sealing spring and an adjusting rod, the sealing block is slidably mounted in the air inlet channel, the sealing spring is mounted on the sealing block and connected with the side wall of the air inlet channel, an adjusting cavity communicated with the sealing cavity is formed in the side wall of the pressure cylinder body, the adjusting cavity is communicated with the air inlet channel, the adjusting rod is slidably mounted in the adjusting cavity and connected with the sealing block, and the sealing block seals the air inlet channel under the action of the sealing spring; the sealing block delays and seals the air inlet channel under the action of the adjusting rod.
By adopting the technical scheme, when the air compressor injects air into the sealing cavity, the air overcomes the elasticity of the sealing spring and pushes the sealing block and the adjusting rod to move, so that the sealing block opens the air inlet channel, and the air can enter the sealing cavity; during the air compressor machine pressure release, sealing spring promotes sealed piece and adjusts the pole and removes, the atmospheric pressure of adjusting the intracavity is the same with the atmospheric pressure of sealed intracavity, high-pressure gas supports the regulation pole, it supports sealed piece to adjust the pole, make inlet channel still be in the open mode, the compressed gas of sealed intracavity passes through inlet channel and discharges, make the atmospheric pressure of sealed intracavity reduce, make sealing spring overcome the atmospheric pressure of adjusting the intracavity and promote the closing plate and adjust the pole and remove, thereby close inlet channel, aluminium liquid has further reduced the probability that aluminium liquid got into inlet channel.
Optionally, the connecting groove has been seted up on the inner wall of heat preservation stove, the tank bottom and the gas injection passageway intercommunication of connecting groove, pressure cylinder body threaded connection is in the connecting groove, pressure cylinder body and stalk threaded connection, threaded connection has fixing bolt on the stalk, fixing bolt is connected with pressure cylinder body.
By adopting the technical scheme, the pressure cylinder body and the liquid lifting pipe are detachably arranged in the heat preservation furnace, after the pressure cylinder body and the liquid lifting pipe are used for a long time, the pressure cylinder body and the liquid lifting pipe can be detached from the heat preservation furnace for maintenance and replacement, the connecting groove is communicated with the gas injection channel, so that the gas inlet channel and the gas injection channel do not need to be aligned when the pressure cylinder body is arranged in the heat preservation furnace, and the time required by the installation and alignment of the pressure cylinder body is reduced; the fixing bolt is arranged on the lift pipe and is abutted against the pressure cylinder body, so that the stability of the installation of the lift pipe is improved.
Optionally, a lifting assembly is arranged on the rack and comprises a sealing plate, a lifting cylinder and a positioning piece, the sealing plate is installed on the rack in a sliding mode, the lifting cylinder is installed on the rack and connected with the sealing plate, the sealing plate seals the heat preservation furnace under the action of the lifting cylinder, the liquid lifting pipe is connected with the sealing plate in a sliding mode, and the positioning piece is installed on the sealing plate and connected with the liquid lifting pipe.
By adopting the technical scheme, when the pressure cylinder body is replaced and maintained, the lifting cylinder drives the sealing plate to vertically move, so that the sealing plate is separated from the heat preservation furnace, and the pressure cylinder body and the liquid lifting pipe can be maintained; after the overhaul is accomplished, lift cylinder pulling closing plate seals the heat preservation stove to can reduce the loss of heat in the heat preservation stove, can reduce the atmospheric pressure loss in the heat preservation stove simultaneously, the setting element can be fixed a position and fix the position between stalk and the closing plate, makes the connection between stalk and the closing plate stable.
Optionally, the positioning element includes a positioning plate and a positioning block, the positioning plate is installed on the lift pipe, the positioning block is installed on the upper end face of the positioning plate, a clamping groove is formed in the lower end face of the sealing plate, the sealing plate is connected with the positioning plate under the action of the lifting cylinder, and the positioning block is clamped in the clamping groove.
Through adopting above-mentioned technical scheme, when the closing plate will keep warm the stove and seal, locating piece joint in the draw-in groove of the lateral wall butt of locating plate on the stalk and closing plate on the locating plate has reduced the relative displacement between locating plate and the closing plate to make the stalk stable with being connected of closing plate.
Optionally, the sealing plate is detachably provided with a lower die, and a lower cavity communicated with the lift tube is formed in the side wall of the lower die; the sealing plate is provided with a driving cylinder, the driving cylinder is detachably provided with an upper die, an upper cavity matched with a lower cavity is formed in the side wall of the upper die, and the upper die is connected with the lower die under the action of the driving cylinder.
Through adopting above-mentioned technical scheme, it slides and is close to the lower mould to drive actuating cylinder drive mould, make epicoele and cavity of resorption cooperation form the cavity, after the atmospheric pressure in the sealed intracavity rises, in the stalk of liquid is impressed the aluminium liquid in the pressure cylinder body, aluminium liquid passes through in the stalk gets into the cavity, the air compressor machine continues to inject gas into to the sealed intracavity, make the aluminium liquid in the sealed intracavity constantly get into in the stalk, make the aluminium liquid in the cavity compress tightly, gaseous content in the aluminium liquid has been reduced, thereby the compactness of foundry goods has been improved, lower mould and last mould detachable install on the closing plate, thereby can change different lower moulds and last mould according to the production needs.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the load of the air compressor is reduced through the arrangement of the adjusting mechanism, so that the service life of the air compressor is prolonged; the compactness of the casting is improved, and the service life of the casting is prolonged; meanwhile, the service life of the pressure cylinder body is prolonged, and the shutdown maintenance time of the low-pressure casting machine is reduced, so that the production efficiency of the low-pressure casting machine is improved.
2. Through the arrangement of the gas injection channel, the temperature difference between gas and the aluminum liquid is reduced, and the heating frequency of the heat preserving furnace to the aluminum liquid is reduced, so that the energy consumption of the low-pressure casting machine is reduced.
3. Through the arrangement of the sliding groove, the sensitivity of the plunger rod is increased, and the probability that the aluminum liquid in the sealed cavity flows back to the heat preservation furnace again is reduced.
4. Through the arrangement of the air inlet channel and the sealing element, the probability that the aluminum liquid enters the air inlet channel is reduced when the air compressor releases the pressure, so that the probability that the aluminum liquid blocks the air inlet channel is reduced.
5. Through the arrangement of the connecting grooves and the fixing bolts, the pressure cylinder body and the lift pipe are detachably arranged in the heat preservation furnace, the time required for installing and aligning the pressure cylinder body is shortened, and meanwhile, the stability of installing the lift pipe is improved.
Drawings
FIG. 1 is a schematic perspective view of the present application;
FIG. 2 is a schematic partial perspective view of the adjustment mechanism of the present application with the holding furnace and pressure cylinder partially cut away to show internal structure;
FIG. 3 is a partial perspective view of the pressure cylinder of the present application, partially cut away to show internal structure;
FIG. 4 is a partial perspective view of the seal of the present application with the pressure cylinder partially cut away to show internal structure;
FIG. 5 is an enlarged schematic view of portion A of FIG. 4;
FIG. 6 is a partial perspective view of the unidirectional assembly of the present application with the pressure cylinder partially cut away to show internal structure;
fig. 7 is a partial perspective view of the lift assembly of the present application with the seal plate, lower die and upper die partially cut away to show internal structure.
Reference numerals are as follows: 100. a frame; 110. an air compressor; 200. a holding furnace; 210. a gas injection channel; 220. connecting grooves; 221. a vent channel; 300. an adjustment mechanism; 310. a pressure cylinder; 311. a liquid inlet hole; 312. fixing a column; 313. a liquid inlet tank; 314. a liquid outlet groove; 315. a through hole; 316. controlling the liquid path; 317. a sliding groove; 320. sealing the cavity; 330. an air intake passage; 331. a chute; 340. a seal member; 341. a sealing block; 342. a seal spring; 343. adjusting a rod; 344. a slider; 351. an adjustment chamber; 352. an adjustment groove; 400. a unidirectional component; 410. a piston post; 420. a plunger rod; 430. a plunger spring; 510. a riser tube; 511. mounting holes; 512. fixing the bolt; 610. a sealing plate; 611. positioning a groove; 612. a slide hole; 613. a card slot; 620. a lifting cylinder; 630. a positioning member; 631. positioning a plate; 632. positioning blocks; 711. a first bolt; 712. a lower die; 713. a lower cavity; 721. a support bar; 722. a fixing plate; 732. a driving cylinder; 742. an upper die; 743. an upper chamber.
Detailed Description
The present application is described in further detail below with reference to figures 1-7.
Referring to fig. 1 and 2, the low-pressure casting machine comprises a rectangular frame 100, wherein a circular holding furnace 200 is fixedly arranged on the frame 100, a gas injection channel 210 is arranged in the side wall of the holding furnace 200, and the gas injection channel 210 is spiral and surrounds the holding furnace 200; the lower end of the inner wall of the holding furnace 200 is provided with an annular connecting groove 220, the connecting groove 220 is coaxial with the holding furnace 200, the bottom of the connecting groove 220 is coaxially provided with an annular vent groove 221, and the vent groove 221 is communicated with the gas injection channel 210.
Referring to fig. 1 and 2, an air compressor 110 is fixedly disposed on an upper end surface of the frame 100, an upper end of the gas injection channel 210 is connected to the air compressor 110, so that the air compressor 110 injects compressed gas into the gas injection channel 210, and the other end of the gas injection channel 210 is communicated with the vent groove 221, so that the compressed gas enters the vent groove 221.
Referring to fig. 2 and 3, an adjusting mechanism 300 is arranged in the holding furnace 200, the adjusting mechanism 300 includes a pressure cylinder 310 and two one-way assemblies 400, the pressure cylinder 310 is in a circular truncated cone shape, a thread is arranged on the outer side wall of the pressure cylinder 310, the pressure cylinder 310 is coaxially and threadedly connected in the connecting groove 220, and a sealed cavity 320 is formed between the pressure cylinder 310 and the holding furnace 200.
Referring to fig. 3, the air inlet channels 330 are formed in two opposite side walls of the pressure cylinder 310, the air inlet channels 330 are vertical, the upper ends of the air inlet channels 330 extend to the upper wall of the pressure cylinder 310 and are communicated with the sealed cavity 320, and the lower ends of the air inlet channels 330 penetrate the pressure cylinder 310 downward, so that the air inlet channels 330 are communicated with the vent grooves 221.
Referring to fig. 3 and 4, a sealing member 340 is provided on a side wall of an upper end of the air intake passage 330.
Referring to fig. 4 and 5, the sealing member 340 includes a sealing block 341, a sealing spring 342, and an adjustment lever 343; the sealing block 341 is circular, the sealing block 341 is coaxially and horizontally slidably mounted in the air inlet passage 330, the sealing spring 342 is mounted in the air inlet passage 330, one end of the sealing spring 342 is fixedly connected with the side wall at the upper end of the air inlet passage 330, and the other end of the sealing spring 342 is fixedly connected with the side wall of the sealing block 341.
Referring to fig. 5, a rectangular sliding chute 331 is formed on a side wall of the air inlet channel 330, the sliding chute 331 is horizontal, a sliding block 344 in sliding fit with the sliding chute 331 is fixedly arranged on a side wall of the sealing block 341, a horizontal adjusting cavity 351 is formed on a side wall of the sliding chute 331, the adjusting cavity 351 is cylindrical, an adjusting groove 352 is formed on a side wall of the adjusting cavity 351 far away from the sliding chute 331, the adjusting groove 352 vertically and downwardly penetrates through the pressure cylinder 310 and is communicated with the sealing cavity 320, the adjusting rod 343 is horizontally slidably mounted in the adjusting cavity 351, the adjusting rod 343 horizontally penetrates through the adjusting cavity 351 and is fixedly connected with a side wall of the sliding block 344, the sealing block 341 seals a connecting port of the air inlet channel 330 and the sealing cavity 320 under the elastic force of the sealing spring 342, and when the air pressure in the sealing cavity 320 is relatively high, the sealing block 341 delays closing the inlet passage 330 by the adjusting rod 343, so that the gas in the sealing chamber 320 is discharged out of the pressure cylinder 310 through the inlet passage 330.
Referring to fig. 3 and 6, two opposite side walls of the pressure cylinder 310 are provided with a cylindrical liquid inlet hole 311, the liquid inlet hole 311 is communicated with the sealing cavity 320, the pressure cylinder 310 is provided with two cylindrical fixing columns 312, the fixing columns 312 are formed by splicing two semi-cylinders, the two fixing columns 312 are respectively in threaded connection with the two liquid inlet holes 311, and the two one-way assemblies 400 are respectively installed on the two fixing columns 312.
Referring to fig. 6, a cylindrical liquid inlet groove 313 is formed in a side wall of the fixed column 312, which is away from the sealing cavity 320, the liquid inlet groove 313 is coaxial with the fixed column 312, a rectangular liquid outlet groove 314 is formed in a side wall of the fixed column 312, which faces the sealing cavity 320, a through hole 315 communicated with the liquid inlet groove 313 is formed in a side wall of the liquid outlet groove 314, a control liquid path 316 is formed in a side wall of the liquid inlet groove 313, and the control liquid path 316 is communicated with the through hole 315; the side wall of the liquid outlet tank 314 is provided with a sliding groove 317, and the sliding groove 317 is communicated with the air inlet channel 330.
Referring to fig. 6, the one-way assembly 400 includes a piston column 410, a plunger rod 420 and a plunger spring 430, the piston column 410 is slidably mounted in the control liquid path 316, the plunger rod 420 is slidably mounted in the sliding groove 317, the plunger spring 430 is mounted in the sliding groove 317, one end of the plunger spring 430 is fixedly connected to the side wall of the plunger rod 420, and the other end of the plunger spring 430 abuts against the bottom of the sliding groove 317; the plunger rod 420 seals the through hole 315 under the pushing action of the air compressor 110 and the plunger spring 430; the piston column 410 moves in the control fluid path 316 and abuts against the sidewall of the plunger rod 420, and the plunger rod 420 opens the through hole 315 by the pushing of the piston column 410.
Referring to fig. 2 and 3, the upper end surface of the pressure cylinder 310 is provided with a mounting hole 511, the mounting hole 511 is communicated with the sealed cavity 320, the pressure cylinder 310 is provided with a lift pipe 510, the lift pipe 510 is coaxially screwed in the mounting hole 511, so that the lower end of the lift pipe 510 vertically penetrates into the sealed cavity 320; the lift pipe 510 is threadedly coupled with a fixing bolt 512, and the fixing bolt 512 is tightly pressed against the upper end surface of the pressure cylinder 310, thereby fixing the lift pipe 510 to the pressure cylinder 310.
Referring to fig. 1 and 2, a lifting assembly is arranged on the frame 100, and the lifting assembly includes a sealing plate 610, four lifting cylinders 620 and a positioning member 630, wherein the four lifting cylinders 620 are respectively vertically and fixedly connected to four corners of the frame 100, so that the four lifting cylinders 620 surround the holding furnace 200; the sealing plate 610 is rectangular, four corners of the sealing plate 610 are fixedly connected with piston rods of the four lifting cylinders 620 respectively, so that the sealing plate 610 is horizontal and located above the holding furnace 200, and the sealing plate 610 seals a feeding port of the holding furnace 200 under the driving of the lifting cylinders 620.
Referring to fig. 7, the lower end surface of the sealing plate 610 is provided with a cylindrical positioning groove 611, the bottom of the positioning groove 611 is coaxially provided with a sliding hole 612, and the bottom of the positioning groove 611 is coaxially provided with a clamping groove 613; locating piece 630 includes locating plate 631 and locating piece 632, locating plate 631 is circularly, the coaxial fixed connection of locating plate 631 is on stalk 510, locating plate 631 is located the below of closing plate 610, locating piece 632 is the ring form and locating piece 632's cross-section is triangle-shaped, the coaxial fixed mounting of locating piece 632 is at the up end of locating plate 631, when the pan feeding mouth of closing plate 610 sealed holding furnace 200, locating plate 631 joint is in constant head tank 611, locating piece 632 joint is in draw-in groove 613, and the upper end of stalk 510 upwards passes slide opening 612.
Referring to fig. 7, the upper end surface of the sealing plate 610 is provided with a first bolt 711 and a rectangular lower mold 712, the lower mold 712 is fixedly connected to the upper end surface of the sealing plate 610 through the first bolt 711, a rectangular lower cavity 713 is formed in the upper end surface of the lower mold 712, and the upper end of the lift pipe 510 penetrates upward into the lower cavity 713; the upper end surface of the sealing plate 610 is vertically and fixedly provided with four supporting rods 721, the four supporting rods 721 surround the lower die 712, a rectangular fixing plate 722 is horizontally and fixedly arranged on the supporting rods 721, and the four supporting rods 721 are respectively connected with four corners of the fixing plate 722.
Referring to fig. 7, a driving cylinder 732 is vertically and fixedly disposed on an upper end surface of the fixing plate 722, a piston rod of the driving cylinder 732 penetrates the fixing plate 722 downward, a second bolt and an upper die 742 are fixedly disposed on the piston rod of the driving cylinder 732, the upper die 742 is fixedly connected to the piston rod of the driving cylinder 732 through the second bolt, an upper cavity 743 is disposed on a lower end surface of the upper die 742, the upper cavity 743 is matched with the lower cavity 713, and the upper die 742 and the lower die 712 are abutted against each other under the pushing action of the driving cylinder 732.
The working principle of the low-pressure casting machine in the embodiment of the application is as follows:
when the low-pressure casting machine produces aluminum alloy castings, aluminum liquid is added into the heat preservation furnace 200, when the aluminum liquid in the heat preservation furnace 200 is in contact with the pressure cylinder body 310, the aluminum liquid enters the liquid inlet groove 313 under the action of gravity, the aluminum liquid in the liquid inlet groove 313 simultaneously enters the control liquid path 316, the aluminum liquid pushes the piston column 410 to move under the action of gravity, the piston column 410 is pushed by the aluminum liquid in the control liquid path 316 to be abutted against the side wall of the plunger rod 420, the piston column 410 overcomes the elastic force of the plunger spring 430 and pushes the plunger rod 420 to move, and therefore the plunger rod 420 opens the through hole 315.
After the through hole 315 is opened, the aluminum liquid in the liquid inlet groove 313 passes through the through hole 315 and enters the liquid outlet groove 314, so that the aluminum liquid enters the sealed cavity 320, after the sealed cavity 320 is filled with the aluminum liquid, the air compressor 110 is started, the air compressor 110 injects compressed gas into the gas injection channel 210, the gas enters the vent groove 221 through the gas injection channel 210 and then enters the gas inlet channel 330, the gas overcomes the elastic force of the sealing spring 342 and pushes the sealing block 341 to move, the joint of the gas inlet channel 330 and the sealed cavity 320 is opened, and the compressed gas enters the sealed cavity 320.
After the pressure in the sealed cavity 320 is increased, the gas enters the sliding groove 317 and pushes the plunger rod 420 to move, and the plunger rod 420 seals the through hole 315 under the pushing of the air compressor 110 and the plunger spring 430, so that the aluminum liquid in the sealed cavity 320 cannot flow out of the pressure cylinder 310.
After the pressure in the sealed cavity 320 is increased, the aluminum liquid enters the riser tube 510 and enters between the cavities formed by the lower cavity 713 and the upper cavity 743 through the riser tube 510, the pressure in the sealed cavity 320 is continuously increased, and the aluminum liquid entering between the lower cavity 713 and the upper cavity 743 evacuates the gas in the lower cavity 713 and the gas in the upper cavity 743, so that the compactness of the aluminum alloy casting is improved.
After the aluminum alloy casting is condensed, the air compressor 110 releases pressure, air in the sealed cavity 320 is discharged outwards through the air inlet channel 330, so that the pressure in the sealed cavity 320 is reduced, when the pressure in the sealed cavity 320 is reduced, the pressure in the adjusting cavity 351 is reduced synchronously, the elastic force of the sealing spring 342 overcomes the force of the pressure acting on the adjusting rod 343, the sealing spring 342 pushes the sealing plate 610 and the adjusting rod 343 to move, the connecting part of the air inlet channel 330 and the sealed cavity 320 is sealed by the sealing plate 610, and therefore the probability that aluminum liquid enters the air inlet channel 330 is reduced.
The driving cylinder 732 pulls the upper mold 742 away from the lower mold 712, so that the upper mold 742 drives the solidified aluminum alloy casting away from the lower cavity 713, and the casting is separated from the upper cavity 743, and thus the casting can be continuously produced.
When aluminum liquid is solidified in the lift tube 510 and the pressure cylinder body 310, the lifting cylinder 620 pushes the sealing plate 610 upwards to separate the sealing plate 610 from the holding furnace 200, and the pressure cylinder body 310 and the lift tube 510 are detached from the holding furnace 200, thereby facilitating maintenance and replacement of the pressure cylinder body 310 and the lift tube 510.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (5)
1. A low-pressure casting machine comprises a machine frame (100), wherein a holding furnace (200) and an air compressor (110) are arranged on the machine frame (100), a liquid lifting pipe (510) is arranged in the holding furnace (200), and the low-pressure casting machine is characterized in that: an adjusting mechanism (300) is arranged in the heat preservation furnace (200), the adjusting mechanism (300) comprises a pressure cylinder body (310) and a one-way assembly (400), the pressure cylinder body (310) is installed in the heat preservation furnace (200) and forms a sealed cavity (320) with the heat preservation furnace (200), the liquid lifting pipe (510) penetrates into the sealed cavity (320), the one-way assembly (400) is installed on the pressure cylinder body (310) and enables liquid to flow into the sealed cavity (320) in a one-way mode, and the air compressor (110) is communicated with the inside of the sealed cavity (320); a liquid inlet groove (313) is formed in the outer side wall of the pressure cylinder body (310), a liquid outlet groove (314) is formed in the inner side wall of the pressure cylinder body (310), and a through hole (315) communicated with the liquid outlet groove (314) is formed in the groove side wall of the liquid inlet groove (313); the one-way assembly (400) comprises a piston column (410), a plunger rod (420) and a plunger spring (430), the piston column (410) is slidably mounted in the liquid inlet groove (313), the plunger rod (420) is slidably mounted in the liquid outlet groove (314), the plunger spring (430) is mounted on the plunger rod (420) and connected with the groove side wall of the liquid outlet groove (314), the plunger rod (420) seals the through hole (315) under the action of the plunger spring (430), and the piston column (410) is connected with the plunger rod (420) under the pushing of liquid in the heat preservation furnace (200) and pushes the plunger rod (420) to open the through hole (315); a gas injection channel (210) communicated with the sealed cavity (320) is formed in the side wall of the heat preservation furnace (200), the gas injection channel (210) is spiral, and the gas injection channel (210) is connected with an air compressor (110); an air inlet channel (330) communicated with the air injection channel (210) is formed in the upper wall of the pressure cylinder body (310); a sliding groove (317) communicated with the air inlet channel (330) is formed in the side wall of the liquid outlet groove (314), the plunger rod (420) is slidably mounted in the sliding groove (317), the plunger spring (430) is connected with the bottom of the sliding groove (317), and the plunger rod (420) seals the through hole (315) under the action of the air compressor (110) and the plunger spring (430); a sealing element (340) is arranged on the side wall of the pressure cylinder body (310), the sealing element (340) comprises a sealing block (341), a sealing spring (342) and an adjusting rod (343), the sealing block (341) is installed in the air inlet channel (330) in a sliding manner, the sealing spring (342) is installed on the sealing block (341) and connected with the side wall of the air inlet channel (330), an adjusting cavity (351) communicated with the sealing cavity (320) is formed in the side wall of the pressure cylinder body (310), the adjusting cavity (351) is communicated with the air inlet channel (330), the adjusting rod (343) is installed in the adjusting cavity (351) in a sliding manner and connected with the sealing block (341), and the sealing block (341) seals the air inlet channel (330) under the action of the sealing spring (342); the sealing block (341) delays to close the air inlet channel (330) under the action of the adjusting rod (343).
2. A low pressure casting machine according to claim 1, characterized in that: connecting groove (220) have been seted up on the inner wall of heat preservation stove (200), the tank bottom and gas injection passageway (210) intercommunication of connecting groove (220), pressure cylinder body (310) threaded connection is in connecting groove (220), pressure cylinder body (310) and stalk (510) threaded connection, threaded connection has fixing bolt (512) on stalk (510), fixing bolt (512) are connected with pressure cylinder body (310).
3. A low pressure casting machine according to claim 1, characterized in that: be provided with lifting unit on frame (100), lifting unit includes closing plate (610), lift cylinder (620) and setting element (630), closing plate (610) slides and installs in frame (100), lift cylinder (620) are installed in frame (100) and are connected with closing plate (610), closing plate (610) seals holding furnace (200) under the effect of lift cylinder (620), stalk (510) slide with closing plate (610) and are connected, setting element (630) are installed on closing plate (610) and are connected with stalk (510).
4. A low-pressure casting machine according to claim 3, characterized in that: locating piece (630) includes locating plate (631) and locating piece (632), install on stalk (510) locating plate (631), the up end at locating plate (631) is installed in locating piece (632), draw-in groove (613) have been seted up to the lower terminal surface of closing plate (610), closing plate (610) are connected with locating plate (631) under lift cylinder (620)'s effect, locating piece (632) joint is in draw-in groove (613).
5. A low pressure casting machine according to claim 3, wherein: the sealing plate (610) is detachably provided with a lower die (712), and the side wall of the lower die (712) is provided with a lower cavity (713) communicated with the riser tube (510); the sealing plate (610) is provided with a driving cylinder (732), an upper die (742) is detachably arranged on the driving cylinder (732), the side wall of the upper die (742) is provided with an upper cavity (743) matched with the lower cavity (713), and the upper die (742) is connected with the lower die (712) under the action of the driving cylinder (732).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110098609.7A CN112893807B (en) | 2021-01-25 | 2021-01-25 | Low-pressure casting machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110098609.7A CN112893807B (en) | 2021-01-25 | 2021-01-25 | Low-pressure casting machine |
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| CN112893807A CN112893807A (en) | 2021-06-04 |
| CN112893807B true CN112893807B (en) | 2022-07-08 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115805302B (en) * | 2022-11-29 | 2023-07-18 | 滁州金诺实业有限公司 | Sealing structure of low-pressure casting furnace |
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| CN2569948Y (en) * | 2002-09-30 | 2003-09-03 | 福州华镁新技术开发有限公司 | Magnesium alloy low-pressure die-casting machine |
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| DE102011056985A1 (en) * | 2011-12-23 | 2013-06-27 | Martinrea Honsel Germany Gmbh | Casting device for casting cylinder crankcases according to the low-pressure method |
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| CN110270539A (en) * | 2019-04-30 | 2019-09-24 | 宁波恒帅微电机有限公司 | The washer of automatic liquid-spraying and air blowing |
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| CN2569948Y (en) * | 2002-09-30 | 2003-09-03 | 福州华镁新技术开发有限公司 | Magnesium alloy low-pressure die-casting machine |
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| DE102011056985A1 (en) * | 2011-12-23 | 2013-06-27 | Martinrea Honsel Germany Gmbh | Casting device for casting cylinder crankcases according to the low-pressure method |
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| CN112893807A (en) | 2021-06-04 |
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