Pressure-regulating casting device for thin-wall casting

Abstract

The invention belongs to the technical field of low-pressure casting, and particularly relates to a pressure-regulating casting device for thin-wall castings, which comprises a casting table, a lifting upper die mechanism, a heat exchange mechanism and a drawing mechanism, the casting table comprises a crucible, a supporting table and a lower die component, the supporting table is arranged at the top of the crucible, and the lower die component is arranged at the top of the supporting table; the lifting upper die mechanism is arranged on the supporting table; the heat exchange mechanism is connected with the lower die part and comprises air cylinders on the two sides, piston rods, pistons, an air inlet pipe, an exhaust pipe and a heat exchange pipe, the piston rods are arranged at the tops of the air cylinders, the pistons are arranged at the bottoms of the piston rods, high-temperature waste gas is recycled, meanwhile, direct contact between molten liquid and a low-temperature die cavity can be avoided through preheating, and the heat exchange efficiency is improved. And the molten liquid is prevented from instantly curing to form a surface thin shell, subsequent pressure application is facilitated to mold a casting, and the molding quality is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of low-pressure casting, and particularly to a pressure-regulating casting device for thin-walled castings. Background Art

[0002] Low-pressure casting means that the mold is generally placed above a sealed crucible, and compressed air is introduced into the crucible to create a low pressure (0.06 - 0.15 MPa) on the surface of the molten metal, so that the molten metal rises through the riser tube to fill the mold and control solidification. This casting method has good feeding, the castings have a dense structure, and it is easy to cast large thin-walled and complex castings.

[0003] During the low-pressure casting process, it is necessary to inject the melt into the mold cavity and apply pressure to solidify the surface of the melt to form a thin-walled casting. However, when the temperature of the mold itself is relatively low, the outer side of the melt contacts the mold, which will cause the outer surface of the melt to solidify instantly to form a shell. The subsequent pressure application has little effect on the solidified surface shell, affecting the surface forming quality of the thin-walled casting. For this reason, a pressure-regulating casting device for thin-walled castings is proposed. Summary of the Invention

[0004] The purpose of this part is to outline some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this part, as well as in the abstract and title of the present application, to avoid obscuring the purpose of this part, the abstract, and the title. However, such simplifications or omissions shall not be used to limit the scope of the present invention.

[0005] In view of the above and / or problems existing in the current low-pressure casting, the present invention is proposed.

[0006] Therefore, the purpose of the present invention is to provide a pressure-regulating casting device for thin-walled castings, which can realize the recycling of high-temperature waste gas. At the same time, preheating can avoid the direct contact between the melt and the low-temperature mold cavity, prevent the melt from solidifying instantly to form a surface thin shell, facilitate subsequent pressure application to form the casting, and ensure the forming quality.

[0007] To solve the above technical problems, according to one aspect of the present invention, the following technical solutions are provided:

[0008] A pressure-regulating casting device for thin-walled castings, comprising:

[0009] A casting table, including a crucible, a support table, and a lower mold component. The support table is arranged on the top of the crucible, and the lower mold component is arranged on the top of the support table;

[0010] A lifting upper mold mechanism, arranged on the support table;

[0011] A heat exchange mechanism is connected to the lower die component. The heat exchange mechanism includes air cylinders on both sides, piston rods, pistons, inlet pipes, exhaust pipes, and heat exchange pipes. Piston rods are arranged at the tops of the air cylinders, pistons are arranged at the bottoms of the piston rods, inlet pipes and exhaust pipes are arranged at the bottoms of the side walls of the air cylinders, the exhaust pipes are all connected to the heat exchange pipes leading into the lower die component, and one of the inlet pipes is communicated with the inner cavity of the crucible.

[0012] A drawing mechanism is connected between the lifting upper die mechanism and the piston rod.

[0013] As a preferred solution of a pressure regulating casting device for thin-walled castings according to the present invention, the lifting upper die mechanism includes a bracket, a track, a motor, a lead screw, an internally threaded sleeve, an upper die component, and a gripping block. The bottom of the bracket is fixed to the rear side of the top of the support table. A track is arranged on the front side of the bracket. A motor is arranged on the top of the bracket. A lead screw is arranged at the output end of the motor. An internally threaded sleeve is arranged at the lower end of the lead screw. The upper die component is arranged at the bottom of the internally threaded sleeve. The upper die component is slidably connected to the track. Gripping blocks are arranged on both sides of the top of the upper die component.

[0014] As a preferred solution of a pressure regulating casting device for thin-walled castings according to the present invention, the drawing mechanism includes a support connecting rod, a first rack, a first connecting rod, a second connecting rod, a second rack, a transmission shaft, and a gear. The side wall of the upper die component is connected to the support connecting rod. The first rack is arranged at the end of the support connecting rod. The first connecting rod connected to one of the piston rods is arranged beside the first rack. The second connecting rod is connected to the other piston rod. The second rack is arranged at the end of the second connecting rod. The transmission shaft is connected to the crucible. A gear meshing with the first rack and the second rack is arranged at the end of the transmission shaft.

[0015] As a preferred solution of a pressure regulating casting device for thin-walled castings according to the present invention, a liquid storage container is arranged inside the crucible. A feeding pipe is connected between the lower die component and the crucible. A pressure relief pipe is arranged on the right side wall of the crucible. A pressure component is connected to the left side wall of the crucible. The pressure relief pipe is communicated with one of the inlet pipes.

[0016] As a preferred embodiment of a pressure-regulating casting device for thin-walled castings according to the present invention, wherein: a crushing mechanism is provided on the feed pipe, and the crushing mechanism includes a rotating bevel gear, a driving bevel gear, a support plate, a crushing rod, crushing teeth, a fixing ring, and an arc-shaped convex block. The rotating bevel gear is rotatably connected to the outer wall of the feed pipe, a driving bevel gear is provided at one end of the transmission shaft located inside the crucible, the driving bevel gear is meshed with the rotating bevel gear, a uniformly distributed support plate is provided at the bottom of the rotating bevel gear, parallel crushing rods are provided at the bottom of each support plate, crushing teeth are provided at the lower end of the crushing rod, the fixing ring is fixed to the outer wall of the feed pipe, the fixing ring is located below the rotating bevel gear, and uniformly distributed arc-shaped convex blocks are provided on the outer wall of the fixing ring.

[0017] As a preferred embodiment of a pressure-regulating casting device for thin-walled castings according to the present invention, wherein: a knocking mechanism is provided inside the crucible, and the knocking mechanism includes a rotating shaft, a driven bevel gear, a spring, and a knocking head. The rotating shaft is rotatably connected to the bottom of the support table, a driven bevel gear meshed with the rotating bevel gear is provided at the bottom of the rotating shaft, and the knocking head is connected to the outer wall of the rotating shaft through a spring.

[0018] As a preferred embodiment of a pressure-regulating casting device for thin-walled castings according to the present invention, wherein: a demolding mechanism is provided on the top of the support table, and the demolding mechanism includes a slide rail, a slider, a support shaft, a V-shaped clamping plate, a torsion spring, a clamping block, and a hook. The slide rails are fixed on the left and right sides of the bracket, sliders are provided on the slide rails, support shafts are provided at the front ends of the sliders, V-shaped clamping plates are rotatably connected to the support shafts, torsion springs are connected between the V-shaped clamping plates and the support shafts, clamping blocks are provided at the lower ends of the V-shaped clamping plates, and hooks corresponding to the holding blocks are provided at the upper ends of the V-shaped clamping plates.

[0019] As a preferred embodiment of a pressure-regulating casting device for thin-walled castings according to the present invention, wherein: the heat exchange tubes are coiled and buried in the inner wall of the lower die member, and the exhaust ports of the heat exchange tubes face the upper die member.

[0020] When the rotating shaft rotates, the knocking head knocks on the outer wall of the feed pipe.

[0021] As a preferred embodiment of a pressure-regulating casting device for thin-walled castings according to the present invention, wherein: one-way air valves are provided on both the intake pipe and the exhaust pipe.

[0022] Compared with the prior art: In the present invention, high-temperature gas discharged during the pressure relief of the crucible is collected by an air cylinder on one side. When the upper die is closed before die casting, the upper die lifting mechanism descends for closing. During the closing process, the upper die lifting mechanism drives the piston rod of the air cylinder on one side to press down through the pulling mechanism, discharging the high-temperature gas in the air cylinder. The high-temperature gas is introduced into the lower die and then blown onto the upper die to preheat the lower die and the upper die. After die casting, the pulling mechanism drives the air cylinder on the other side to exhaust, and the normal-temperature gas in the other side gas is introduced into the lower die and then blown onto the casting on the upper die to cool the casting, facilitating the taking and placing of the casting, realizing the recycling of high-temperature waste gas. At the same time, preheating can avoid the direct contact between the molten liquid and the low-temperature die cavity, prevent the molten liquid from instantaneously solidifying to form a surface thin shell, facilitate subsequent pressing to form the casting, and ensure the forming quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the present invention will be described in detail below with reference to the drawings and detailed embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. Among them:

[0024] Figure 1 is the axonometric structure schematic diagram of the present invention;

[0025] Figure 2 is the internal connection structure schematic diagram of the crucible of the present invention;

[0026] Figure 3 is the structure schematic diagram of the casting table of the present invention;

[0027] Figure 4 is the structure schematic diagram of the heat exchange mechanism of the present invention;

[0028] Figure 5 is the structure schematic diagram of the pulling mechanism of the present invention;

[0029] Figure 6 is the structure schematic diagram of the knocking mechanism of the present invention;

[0030] Figure 7 is the structure schematic diagram of the demolding mechanism of the present invention.

[0031] In the figure: 100 casting table, 110 crucible, 120 support table, 130 lower die component, 140 liquid storage container, 150 feeding pipe, 160 pressure relief pipe, 170 pressure component, 200 lifting upper die mechanism, 210 bracket, 220 track, 230 motor, 240 lead screw, 250 internal thread sleeve, 260 upper die component, 270 gripping block, 300 heat exchange mechanism, 310 air cylinder, 320 piston rod, 330 piston, 340 intake pipe, 350 exhaust pipe, 360 heat exchange pipe, 370 one-way air valve, 400 pulling mechanism, 410 support connecting rod, 420 first rack, 430 first connecting rod, 440 second connecting rod, 450 second rack, 460 transmission shaft, 470 gear, 500 crushing mechanism, 510 rotating bevel gear, 520 driving bevel gear, 530 support plate, 540 crushing rod, 541 crushing teeth, 550 fixing ring, 560 arc-shaped convex block, 600 knocking mechanism, 610 rotating shaft, 620 driven bevel gear, 630 spring, 640 knocking head, 700 demoulding mechanism, 710 slide rail, 720 slider, 730 support shaft, 740 V-shaped clamping plate, 750 torsion spring, 760 clamping block, 770 hook. Detailed implementation manners

[0032] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the following will describe the detailed implementation manners of the present invention in conjunction with the accompanying drawings.

[0033] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific implementation manners disclosed below.

[0034] Secondly, the present invention will be described in detail with reference to the schematic diagrams. When detailing the embodiments of the present invention, for the convenience of description, the cross-sectional views showing the device structure will be enlarged locally not in accordance with the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention herein. In addition, in actual production, three-dimensional spatial dimensions including length, width and depth should be included.

[0035] In order to make the purpose, technical solutions and advantages of the present invention clearer, the following will further describe the embodiments of the present invention in detail in conjunction with the accompanying drawings.

[0036] The present invention provides a pressure-regulating casting device for thin-walled castings, which realizes the recycling of high-temperature waste gas. At the same time, preheating can avoid the direct contact between the molten liquid and the low-temperature die cavity, prevent the molten liquid from instantly solidifying to form a surface thin shell, facilitate subsequent pressure application to make the casting form, and ensure the forming quality. Please refer to Figures 1 - 7 , including: a casting table 100, a lifting upper die mechanism 200, a heat exchange mechanism 300, and a pulling mechanism 400.

[0037] The casting table 100 includes a crucible 110, a support table 120, and a lower die component 130. The support table 120 is arranged on the top of the crucible 110, and the lower die component 130 is arranged on the top of the support table 120. A liquid storage container 140 is arranged inside the crucible 110. A feeding pipe 150 is connected between the lower die component 130 and the crucible 110. A pressure relief pipe 160 is arranged on the right side wall of the crucible 110, and a pressure component 170 is connected to the left side wall of the crucible 110. The pressure relief pipe 160 is communicated with an intake pipe 340 on one side;

[0038] The pressure component 170 ventilates the crucible 110 to adjust the internal air pressure of the crucible 110. The molten casting liquid in the liquid storage container 140 is pressed by the air pressure, so that the molten liquid enters the mold cavity of the lower die component 130 through the feeding pipe 150 for casting. Then, the air is released and the pressure is relieved through the pressure relief pipe 160, so that the molten liquid flows back into the liquid storage container 140, and the solidified molten liquid in the lower die component 130 forms a thin-walled casting.

[0039] The lifting upper die mechanism 200 is arranged on the support table 120. Specifically, the lifting upper die mechanism 200 includes a bracket 210, a track 220, a motor 230, a lead screw 240, an internally threaded sleeve 250, an upper die component 260, and a gripping block 270. The bottom of the bracket 210 is fixed to the rear side of the top of the support table 120. The track 220 is arranged on the front side of the bracket 210. The motor 230 is arranged on the top of the bracket 210. The output end of the motor 230 is provided with the lead screw 240. The lower end of the lead screw 240 is provided with the internally threaded sleeve 250. The bottom of the internally threaded sleeve 250 is provided with the upper die component 260. The upper die component 260 is slidably connected to the track 220. Gripping blocks 270 are arranged on both sides of the top of the upper die component 260;

[0040] Among them, the internally threaded sleeve 250 is fixedly connected to the upper die component 260. The motor 230 drives the lead screw 240 to rotate to provide the acting force of screw feed, drives the internally threaded sleeve 250 and the upper die component 260 to move, so that the upper die component 260 moves up and down on the track 220. After the upper die component 260 descends, it is combined with the lower die component 130 to form a complete die-casting chamber.

[0041] The heat exchange mechanism 300 is connected to the lower die component 130. The heat exchange mechanism 300 includes air cylinders 310, piston rods 320, pistons 330, intake pipes 340, exhaust pipes 350, and heat exchange pipes 360 on both sides. Piston rods 320 are arranged on the tops of the air cylinders 310. Pistons 330 are arranged at the bottoms of the piston rods 320. Intake pipes 340 and exhaust pipes 350 are arranged at the bottoms of the side walls of the air cylinders 310. The exhaust pipes 350 are all connected to the heat exchange pipes 360 leading into the lower die component 130. One intake pipe 340 is communicated with the inner cavity of the crucible 110;

[0042] Among them, the heat exchange tube 360 is coiled and buried in the inner wall of the lower die component 130, and the exhaust port of the heat exchange tube 360 faces the upper die component 260. The air cylinder 310 is divided into two parts, the front and the rear. The front air cylinder 310 is connected to the crucible 110 to store hot gas, and the rear air cylinder 310 directly stores normal temperature gas. The hot gas discharged after the pressure relief pipe 160 discharges pressure enters the air cylinder 310. The gas in the air cylinder 310 enters the heat exchange tube 360 through the exhaust pipe 350, and the heat exchange tube 360 exchanges heat for the lower die component 130. At the same time, the gas in the heat exchange tube 360 blows towards the upper die component 260.

[0043] The drawing mechanism 400 is connected between the lifting upper die mechanism 200 and the piston rod 320. Specifically, the drawing mechanism 400 includes a support connecting rod 410, a first rack 420, a first connecting rod 430, a second connecting rod 440, a second rack 450, a transmission shaft 460 and a gear 470. The side wall of the upper die component 260 is connected to the support connecting rod 410. The first rack 420 is arranged at the end of the support connecting rod 410. A first connecting rod 430 connected to one side of the piston rod 320 is arranged on the side of the first rack 420. The second connecting rod 440 is connected to the piston rod 320 on the other side. The second rack 450 is arranged at the end of the second connecting rod 440. The transmission shaft 460 is connected to the crucible 110, and a gear 470 meshing with the first rack 420 and the second rack 450 is arranged at the end of the transmission shaft 460.

[0044] Among them, when the upper die component 260 descends, the piston rod 320 of the hot gas cylinder 310 is driven to descend through the support connecting rod 410, the first rack 420 and the first connecting rod 430. The piston rod 320 drives the piston 330 to descend, so that the hot gas in the hot gas cylinder 310 is discharged through the exhaust pipe 350 and the heat exchange tube 360, and the high-temperature gas is introduced into the lower die component 130 and then blows towards the upper die component 260 to preheat the lower die and the upper die.

[0045] When the first rack 420 descends, the second rack 450 is driven to rise through the gear 470. The second rack 450 drives the piston rod 320 to rise through the second connecting rod 440. The piston rod 320 drives the piston 330 to rise, so that the air cylinder 310 inhales air inward through the intake pipe 340. Finally, the piston rods 320 on both sides move in opposite directions, one piston rod 320 rises and the air cylinder 310 inhales air, while the other piston rod 320 descends and the air cylinder 310 exhausts air.

[0046] When the upper die component 260 rises, the hot gas cylinder 310 inhales air, and the normal temperature air cylinder 310 exhausts air. The gas in the normal temperature gas is discharged through the exhaust pipe 350 and the heat exchange tube 360 and blown towards the casting to cool the casting.

[0047] Due to the presence of air bubbles inside the molten liquid, there will be air bubbles in the casting, which will affect the quality of the casting. Therefore, a crushing mechanism 500 is provided on the feed pipe 150. The crushing mechanism 500 includes a rotating bevel gear 510, a driving bevel gear 520, a support plate 530, a crushing rod 540, a crushing tooth 541, a fixing ring 550, and an arc-shaped convex block 560. The rotating bevel gear 510 is rotatably connected to the outer wall of the feed pipe 150. One end of the transmission shaft 460 located inside the crucible 110 is provided with a driving bevel gear 520. The driving bevel gear 520 is meshed with the rotating bevel gear 510. The bottom of the rotating bevel gear 510 is provided with uniformly distributed support plates 530. Parallel crushing rods 540 are provided at the bottoms of the support plates 530. Crushing teeth 541 are provided at the lower ends of the crushing rods 540. The fixing ring 550 is fixed to the outer wall of the feed pipe 150. The fixing ring 550 is located below the rotating bevel gear 510. Uniformly distributed arc-shaped convex blocks 560 are provided on the outer wall of the fixing ring 550;

[0048] Among them, when the gear 470 rotates, it drives the transmission shaft 460 to rotate. The transmission shaft 460 drives the driving bevel gear 520 to rotate. The driving bevel gear 520 drives the rotating bevel gear 510 to rotate. The rotating bevel gear 510 drives the crushing rod 540 to rotate, stirring the molten liquid in the liquid storage container 140. The rotating crushing rod 540 contacts the arc-shaped convex block 560. Under the extrusion of the arc-shaped convex block 560, the crushing rod 540 bends. The bent crushing rod 540 deflects and approaches another crushing rod 540, forming a clamping structure, so that the crushing teeth 541 continuously bite, bursting the air bubbles in the molten liquid, reducing the air bubbles in the molten liquid in the liquid storage container 140, and avoiding the air bubbles from affecting the forming quality of the casting.

[0049] Since there are likely to be air bubbles in the pipeline during the back-and-forth ventilation, a knocking mechanism 600 is provided inside the crucible 110. The knocking mechanism 600 includes a rotating shaft 610, a driven bevel gear 620, a spring 630, and a knocking head 640. The rotating shaft 610 is rotatably connected to the bottom of the support table 120. A driven bevel gear 620 meshed with the rotating bevel gear 510 is provided at the bottom of the rotating shaft 610. The knocking head 640 is connected to the outer wall of the rotating shaft 610 through a spring 630;

[0050] Among them, the rotating bevel gear 510 drives the driven bevel gear 620 to rotate through meshing. The driven bevel gear 620 drives the rotating shaft 610 to rotate. When the rotating shaft 610 rotates, the knocking head 640 knocks on the outer wall of the feed pipe 150 to remove the air bubbles inside the feed pipe 150.

[0051] Since the bottom of the casting is connected to the feeding pipe 150 after the casting is formed, a water inlet connected to the inside of the feeding pipe 150 will be formed at the bottom of the casting, making it difficult to remove the casting. Moreover, the temperature of the formed casting is relatively high and it cannot be manually taken out for demolding. Therefore, a demolding mechanism 700 is provided at the top of the support table 120. The demolding mechanism 700 includes a slide rail 710, a slider 720, a support shaft 730, a V-shaped clamping plate 740, a torsion spring 750, a clamping block 760, and a hook 770. The slide rails 710 are fixed on the left and right sides of the support 210. Sliders 720 are arranged on the slide rails 710. Support shafts 730 are arranged at the front ends of the sliders 720. V-shaped clamping plates 740 are rotatably connected to the support shafts 730. Torsion springs 750 are connected between the V-shaped clamping plates 740 and the support shafts 730. Clamping blocks 760 are arranged at the lower ends of the V-shaped clamping plates 740. Hooks 770 corresponding to the holding blocks 270 are arranged at the upper ends of the V-shaped clamping plates 740;

[0052] Among them, after the upper die member 260 rises, the two ends of the top of the upper die member 260 abut against the upper ends of the V-shaped clamping plates 740, causing the V-shaped clamping plates 740 to rotate. The lower ends of the rotating V-shaped clamping plates 740 approach each other and clamp the casting. Then the upper die member 260 continues to rise, driving the V-shaped clamping plates 740 to rise, so that the V-shaped clamping plates 740 clamp the casting and rise for demolding. During the rising process of the V-shaped clamping plates 740, the sliders 720 slide stably on the slide rails 710.

[0053] One-way air valves 370 are provided on both the intake pipe 340 and the exhaust pipe 350, so that the air flow can only enter the air cylinder 310 from the crucible 110 and is discharged unidirectionally from the air cylinder 310.

[0054] During specific use, the motor 230 drives the lead screw 240 to rotate to provide the acting force for screw feeding, driving the internally threaded sleeve 250 and the upper die component 260 to move, enabling the upper die component 260 to move up and down on the track 220. After the upper die component 260 descends, it is combined with the lower die component 130 to form a complete die-casting chamber. During the descent of the upper die component 260, the piston rod 320 of the hot gas cylinder 310 is driven to descend through the support connecting rod 410, the first rack 420, and the first connecting rod 430. The piston rod 320 drives the piston 330 to descend, causing the hot gas in the hot gas cylinder 310 to be discharged through the exhaust pipe 350 and the heat exchange pipe 360, allowing the high-temperature gas to enter the lower die component 130 and then blow towards the upper die component 260 to preheat the lower die and the upper die. Subsequently, the pressure component 170 ventilates the crucible 110 to adjust the internal air pressure of the crucible 110. The molten casting material in the liquid storage container 140 is pressed by the air pressure, causing the molten material to enter the cavity of the lower die component 130 through the feeding pipe 150 for casting. Then, the pressure is released through the pressure relief pipe 160 to drain the pressure, causing the molten material to flow back into the liquid storage container 140. The solidified molten material in the lower die component 130 forms a thin-walled casting. The hot gas discharged after the pressure is released through the pressure relief pipe 160 enters the cylinder 310 for storage. After the upper die component 260 rises, the two ends of the top of the upper die component 260 abut against the upper ends of the V-shaped clamping plates 740, causing the V-shaped clamping plates 740 to rotate. The lower ends of the rotating V-shaped clamping plates 740 approach each other and clamp the casting. Then, the upper die component 260 continues to rise, driving the V-shaped clamping plates 740 to rise, causing the V-shaped clamping plates 740 to clamp the casting and rise for demoulding. At the same time, when the upper die component 260 rises, the normal-temperature cylinder 310 exhausts air, and the gas in the normal-temperature gas is discharged through the exhaust pipe 350 and the heat exchange pipe 360 and blown towards the casting to cool the casting. When the gear 470 rotates, it drives the transmission shaft 460 to rotate. The transmission shaft 460 drives the driving bevel gear 520 to rotate. The driving bevel gear 520 drives the rotating bevel gear 510 to rotate. The rotating bevel gear 510 drives the crushing rod 540 to rotate to stir the molten material in the liquid storage container 140, causing the bubbles in the molten material to burst and reducing the bubbles in the molten material in the liquid storage container 140. The rotating bevel gear 510 meshes with and drives the driven bevel gear 620 to rotate. The driven bevel gear 620 drives the rotating shaft 610 to rotate. When the rotating shaft 610 rotates, the knocking head 640 knocks on the outer wall of the feeding pipe 150 to remove the bubbles inside the feeding pipe 150, avoiding the influence of the existence of bubbles on the forming quality of the casting.

[0055] Although the present invention has been described above with reference to the embodiments, various modifications thereof can be made and components thereof can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in the present invention can be combined with each other in any way, and the reason for not exhaustively describing the situations of these combinations in this specification is only to save space and resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A pressure regulating casting device for thin-walled castings, characterized in that, Comprising: A casting table (100), including a crucible (110), a support table (120) and a lower die component (130). A support table (120) is arranged on the top of the crucible (110), and a lower die component (130) is arranged on the top of the support table (120); A lifting upper die mechanism (200), arranged on the support table (120); A heat exchange mechanism (300), connected to the lower die component (130). The heat exchange mechanism (300) includes air cylinders (310) on both sides, piston rods (320), pistons (330), intake pipes (340), exhaust pipes (350) and heat exchange pipes (360). Piston rods (320) are arranged on the tops of the air cylinders (310), pistons (330) are arranged at the bottoms of the piston rods (320), intake pipes (340) and exhaust pipes (350) are arranged at the bottoms of the side walls of the air cylinders (310), the exhaust pipes (350) are all connected to the heat exchange pipes (360) leading into the lower die component (130), and one side of the intake pipe (340) is communicated with the inner cavity of the crucible (110); A pulling mechanism (400), connected between the lifting upper die mechanism (200) and the piston rod (320).

2. The pressure regulating casting device for thin-walled castings according to claim 1, characterized in that, The lifting upper die mechanism (200) includes a bracket (210), a track (220), a motor (230), a lead screw (240), an internally threaded sleeve (250), an upper die component (260) and a gripping block (270). The bottom of the bracket (210) is fixed to the rear side of the top of the support table (120), a track (220) is arranged on the front side of the bracket (210), a motor (230) is arranged on the top of the bracket (210), a lead screw (240) is arranged at the output end of the motor (230), an internally threaded sleeve (250) is arranged at the lower end of the lead screw (240), an upper die component (260) is arranged at the bottom of the internally threaded sleeve (250), the upper die component (260) is slidably connected to the track (220), and gripping blocks (270) are arranged on both sides of the top of the upper die component (260).

3. The pressure regulating casting device for thin-walled castings according to claim 2, characterized in that, The pulling mechanism (400) includes a support connecting rod (410), a first rack (420), a first connecting rod (430), a second connecting rod (440), a second rack (450), a transmission shaft (460) and a gear (470). A support connecting rod (410) is connected to the side wall of the upper die component (260), a first rack (420) is arranged at the end of the support connecting rod (410), a first connecting rod (430) connected to one side of the piston rod (320) is arranged on the side of the first rack (420), a second connecting rod (440) is connected to the other side of the piston rod (320), a second rack (450) is arranged at the end of the second connecting rod (440), a transmission shaft (460) is connected to the crucible (110), and a gear (470) meshing with the first rack (420) and the second rack (450) is arranged at the end of the transmission shaft (460).

4. A pressure-regulating casting device for thin-walled castings according to claim 3, characterized in that, A liquid storage container (140) is arranged inside the crucible (110). A feeding pipe (150) is connected between the lower die component (130) and the crucible (110). A pressure relief pipe (160) is arranged on the right side wall of the crucible (110). A pressure component (170) is connected to the left side wall of the crucible (110). The pressure relief pipe (160) is communicated with an air inlet pipe (340) on one side.

5. A pressure regulating casting device for thin-walled castings according to claim 4, characterized in that, A crushing mechanism (500) is arranged on the feeding pipe (150). The crushing mechanism (500) includes a rotating bevel gear (510), a driving bevel gear (520), a support plate (530), a crushing rod (540), crushing teeth (541), a fixing ring (550) and an arc-shaped convex block (560). The rotating bevel gear (510) is rotatably connected to the outer wall of the feeding pipe (150). A driving bevel gear (520) is arranged at one end of the transmission shaft (460) located inside the crucible (110). The driving bevel gear (520) is meshed and connected with the rotating bevel gear (510). Uniformly distributed support plates (530) are arranged at the bottom of the rotating bevel gear (510). Parallel crushing rods (540) are arranged at the bottom of each support plate (530). Crushing teeth (541) are arranged at the lower ends of the crushing rods (540). The fixing ring (550) is fixed on the outer wall of the feeding pipe (150). The fixing ring (550) is located below the rotating bevel gear (510). Uniformly distributed arc-shaped convex blocks (560) are arranged on the outer wall of the fixing ring (550).

6. The pressure regulating casting device for thin-walled castings according to claim 5, characterized in that, A knocking mechanism (600) is arranged inside the crucible (110). The knocking mechanism (600) includes a rotating shaft (610), a driven bevel gear (620), a spring (630) and a knocking head (640). The rotating shaft (610) is rotatably connected to the bottom of the support table (120). A driven bevel gear (620) meshed with the rotating bevel gear (510) is arranged at the bottom of the rotating shaft (610). The knocking head (640) is connected to the outer wall of the rotating shaft (610) through the spring (630).

7. A pressure regulating casting device for thin-walled castings according to claim 2, characterized in that, A demoulding mechanism (700) is arranged on the top of the support table (120). The demoulding mechanism (700) includes slide rails (710), sliders (720), support shafts (730), V-shaped clamping plates (740), torsion springs (750), clamping blocks (760) and hooks (770). The slide rails (710) are fixed on the left and right sides of the bracket (210). Sliders (720) are arranged on the slide rails (710). Support shafts (730) are arranged at the front ends of the sliders (720). V-shaped clamping plates (740) are rotatably connected to the support shafts (730). Torsion springs (750) are connected between the V-shaped clamping plates (740) and the support shafts (730). Clamping blocks (760) are arranged at the lower ends of the V-shaped clamping plates (740). Hooks (770) corresponding to the holding blocks (270) are arranged at the upper ends of the V-shaped clamping plates (740).

8. A pressure regulating casting device for thin-walled castings according to claim 2, characterized in that, The heat exchange pipe (360) is coiled and buried in the inner wall of the lower die component (130). The exhaust port of the heat exchange pipe (360) faces the upper die component (260).

9. A pressure regulating casting device for thin-walled castings according to claim 6, characterized in that, When the rotating shaft (610) rotates, the striking head (640) strikes against the outer wall of the feed pipe (150).

10. A pressure regulating casting device for thin-walled castings according to claim 1, characterized in that, One-way air valves (370) are provided on both the intake pipe (340) and the exhaust pipe (350).

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