Crucible injection device and method for high-temperature alloy casting

Abstract

The invention relates to a crucible material injection device and method for high-temperature alloy casting, and relates to the technical field of crucible machining, the device comprises a workbench and a material injection table, and is characterized in that a stirring box is arranged in the workbench, a discharging hole is formed in the material injection table, a material injection pipe is communicated between the discharging hole and the stirring box, and the stirring box and the material injection pipe are arranged in the workbench. The mold is detachably connected to the injection table, a feeding hole corresponding to the discharging hole is formed in the mold, a feeding hole is formed in the stirring box, the stirring box communicates with a vacuum pump, and a pressurizing assembly is further arranged at the upper end of the stirring box and used for extruding materials in the stirring box out of the discharging hole. The pressure in the stirring box is controlled by controlling the pressurizing assembly, then the extrusion amount of the materials in the stirring box is controlled, the control precision of the amount of the materials injected into the mold is improved, and convenience is high.

Description

Technical Field

[0001] The present invention relates to the technical field of crucible processing, and particularly to a crucible feeding device and a feeding method for casting superalloys at high temperature. Background Art

[0002] In the process of forming a ceramic crucible, first, liquid ceramic materials are placed in a material box. After processing the ceramic materials, the ceramic materials are then injected into a mold. After the ceramic materials are cooled, they can be shaped.

[0003] In the prior art, pressure is applied to the material box to extrude the materials into the mold. It is difficult to control the duration of the applied pressure, which may lead to too much or too little material being injected into the mold, and the control accuracy is poor. Summary of the Invention

[0004] In order to improve the control accuracy of the amount of materials injected into the mold, the present application provides a crucible feeding device and a feeding method for casting superalloys at high temperature.

[0005] In a first aspect, the present application provides a crucible feeding device for casting superalloys at high temperature, adopting the following technical solutions: A crucible feeding device for casting superalloys at high temperature, including a workbench and a feeding table, characterized in that: a stirring tank is arranged inside the workbench, a discharge hole is opened on the feeding table, a feeding pipe is communicated between the discharge hole and the stirring tank, a mold is detachably connected to the feeding table, a feeding hole corresponding to the discharge hole is opened on the mold, a feeding hole is opened on the stirring tank, a vacuum pump is communicated with the stirring tank, and a pressurizing assembly is further arranged at the upper end of the stirring tank for extruding the materials inside the stirring tank to the outside of the discharge hole.

[0006] By adopting the above technical solutions, the materials are injected into the stirring tank through the feeding hole. After injecting the preset amount, the feeding pipe is closed, and then the stirring tank is evacuated by using the vacuum pump to discharge the air bubbles in the materials to the outside of the stirring tank, thereby improving the subsequent material forming effect; the mold is placed on the feeding table, the feeding hole is aligned with the discharge hole, and then the inside of the stirring tank is pressurized by using the pressurizing assembly to extrude the materials inside the stirring tank to the outside of the discharge hole and into the mold. By controlling the pressure in the stirring tank by the pressurizing assembly, the extrusion amount of the materials in the stirring tank is controlled, and thus the control accuracy of the amount of materials injected into the mold is improved, and the convenience is relatively high.

[0007] Optionally, the pressurizing assembly includes a cylinder vertically arranged at the upper end of the mixing tank. Both ends of the cylinder in the length direction are closed. A pressurizing pipe is connected between one end of the cylinder close to the mixing tank and the mixing tank. A piston block slides in the cylinder. The circumference of the piston block fits with the cylinder. A blocking plate for opening and closing the pressurizing pipe is slidably connected in the cylinder. The blocking plate is located above the pressurizing pipe. An air inlet is formed in the cylinder. A gas blocking plate for opening and closing the air inlet is slidably connected to the cylinder.

[0008] By adopting the above technical solution, the pressurizing pipe is closed by using the blocking plate, and then the air inlet is opened. The piston block is manipulated to move away from the mixing tank to suck external gas into the interior of the cylinder. Then, by sliding the gas blocking plate, the air inlet is closed. By sliding the blocking plate, the pressurizing pipe is opened, and then the piston block is manipulated to move towards the mixing tank. The material is extruded into the injection pipe by using air pressure. By controlling the stroke of the piston block, the pressure in the mixing tank can be controlled, and thus the extrusion amount of the material in the mixing tank can be controlled, thereby improving the control accuracy of the amount of material injected into the mold, and the convenience is relatively high.

[0009] Optionally, a limiting ring is arranged in the cylinder. The outside of the limiting ring is fixedly connected to the inner wall of the cylinder. When the piston block moves to the position where it abuts against the limiting ring, it abuts against the limiting ring. The air inlet, the pressurizing pipe, the blocking plate, and the gas blocking plate are all located below the limiting ring.

[0010] By adopting the above technical solution, moving the piston block to the position where it abuts against the limiting ring means that the feeding of one crucible is completed. The structure is simple and the control is convenient.

[0011] Optionally, a hydraulic cylinder is arranged at the end of the cylinder away from the mixing tank. The piston rod of the hydraulic cylinder is fixedly connected to the piston block.

[0012] By adopting the above technical solution, by manipulating the extension and retraction of the piston rod of the hydraulic cylinder, the piston block can be driven to move. The structure is simple and the driving is convenient.

[0013] Optionally, a first gear is rotatably connected in the cylinder. A first rack meshing with the first gear is arranged on one side of the blocking plate in the length direction.

[0014] By adopting the above technical solution, by manipulating the first gear to rotate, the first rack is driven to move, and then the blocking plate is driven to move. The structure is simple and the manipulation is convenient.

[0015] Optionally, a second gear is rotatably connected in the cylinder. A second rack is arranged on the side of the gas blocking plate close to the second gear. The second gear is meshed with the second rack.

[0016] By adopting the above technical solution, the rotation of the second gear can drive the second rack to move, and further drive the air baffle to move. The structure is simple and the operation is convenient.

[0017] Optionally, a third gear is rotatably connected in the air cylinder. When the first rack moves to the position of the third gear, it meshes with the third gear. The nozzle of the pressure pipe is located between the first gear and the third gear. A first bevel gear is coaxially and fixedly connected to the upper end of the third gear, and a second bevel gear is coaxially and fixedly connected to the second gear. The second bevel gear meshes with the first bevel gear.

[0018] By adopting the above technical solution, by operating the first gear to rotate, the first rack can be driven to move, and then the third gear can be driven to rotate, so that the first bevel gear can be driven to rotate, and then the second bevel gear can be driven to rotate, and then the second gear can be driven to rotate. The structure is simple and the driving is convenient.

[0019] Optionally, a first motor is arranged in the air cylinder, and the output shaft of the first motor is coaxially and fixedly connected to the first gear.

[0020] By adopting the above technical solution, by operating the output shaft of the first motor to rotate, the first gear can be driven to rotate. The structure is simple and the driving is convenient.

[0021] In a second aspect, the present application provides a charging method for a crucible used in the casting of superalloys.

[0022] A charging method for a crucible used in the casting of superalloys includes the following steps: S1: Inject materials into the mixing box from the feeding hole. After adding to the preset amount, stop feeding and seal the feeding hole. S2: Turn on the vacuum pump to pump the gas inside the mixing box to the outside, and pump the bubbles contained in the materials to the outside of the mixing box. S3: Open the discharge hole, place a gasket above the discharge hole, place a mold on the gasket, align the feeding hole with the discharge hole, and use a clamping device to clamp the mold on the charging table. S4: Open the pressure pipe, operate the air cylinder to pump air into the mixing box, and use air pressure to discharge the materials from the discharge hole and into the mold. S5: After the materials are shaped, release the fixation of the mold and remove the mold from the charging table.

[0023] In summary, the present application includes at least one of the following beneficial technical effects: 1. Inject the material into the mixing tank through the feeding hole. After injecting the preset amount, close the feeding pipe, and then use a vacuum pump to evacuate the mixing tank to discharge the air bubbles in the material to the outside of the mixing tank, thereby improving the subsequent material forming effect. Place the mold on the injection table, align the feeding hole with the discharging hole, and then use the pressurizing component to pressurize the inside of the mixing tank to squeeze the material inside the mixing tank to the outside of the discharging hole and into the mold. By controlling the pressure in the mixing tank by the pressurizing component, the extrusion amount of the material in the mixing tank can be controlled, thereby improving the control accuracy of the amount of material injected into the mold, with high convenience. 2. Use the blocking plate to close the pressurizing pipe, then open the air inlet, manipulate the piston block to move away from the mixing tank to inhale the external gas into the inside of the air cylinder, and then close the air inlet by sliding the air blocking plate. By sliding the blocking plate, open the pressurizing pipe, and then manipulate the piston block to move towards the mixing tank to squeeze the material into the injection pipe by air pressure. By controlling the stroke of the piston block, the pressure in the mixing tank can be controlled, thereby controlling the extrusion amount of the material in the mixing tank and improving the control accuracy of the amount of material injected into the mold, with high convenience. 3. By manipulating the first gear to rotate, the first rack can be driven to move, and then the third gear can be driven to rotate, thereby driving the first bevel gear to rotate, driving the second bevel gear to rotate, and then driving the second gear to rotate. The structure is simple and the driving is convenient. Description of the Drawings

[0024] Figure 1 It is a schematic diagram of the overall structure of a crucible injection device for casting superalloys.

[0025] Figure 2 It is a schematic cross-sectional view highlighting the internal structure of the air cylinder.

[0026] Figure 3 It is a schematic cross-sectional view highlighting the pressurizing pipe.

[0027] Figure 4 It is a schematic diagram highlighting the air inlet.

[0028] Figure 5 It is Figure 2 An enlarged schematic view of part A in

[0029] Description of reference numerals: 1, workbench; 11, mixing tank; 111, feeding pipe; 112, feeding hole; 113, vacuum pump; 114, second motor; 2, feeding table; 21, discharging hole; 3, mold; 31, feeding hole; 4, pressurizing assembly; 41, air cylinder; 411, pressurizing pipe; 412, blocking plate; 4121, first rack; 413, air inlet; 414, air baffle; 4141, second rack; 415, piston block; 416, limiting ring; 417, hydraulic cylinder; 5, first gear; 51, second gear; 511, second bevel gear; 52, third gear; 521, first bevel gear; 53, first motor. Detailed implementation manners

[0030] The following further elaborates on this application in conjunction with all the attached drawings.

[0031] The embodiment of this application discloses a crucible feeding device for superalloy casting.

[0032] Referring to Figure 1 and Figure 2 , a crucible feeding device for superalloy casting includes a workbench 1 and a feeding table 2, and is characterized in that: a mixing tank 11 is arranged inside the workbench 1, a discharging hole 21 is opened on the feeding table 2, a feeding pipe 111 is communicated between the discharging hole 21 and the mixing tank 11, a mold 3 is detachably connected to the feeding table 2, a feeding hole 31 corresponding to the discharging hole 21 is opened on the mold 3, and a feeding hole 112 is opened on the mixing tank 11.

[0033] Referring to Figure 3 and Figure 4 , the mixing tank 11 is communicated with a vacuum pump 113, and a pressurizing assembly 4 is further arranged at the upper end of the mixing tank 11 for squeezing the material inside the mixing tank 11 outside the discharging hole 21. By injecting the material into the mixing tank 11, then using the vacuum pump 113 to extract the gas inside the mixing tank 11, the air bubbles in the material are discharged, and then the pressurizing assembly 4 can be operated to pressurize the mixing tank 11, and the material is extruded into the mold 3 outside the discharging hole 21, completing the injection of the material into the mold 3.

[0034] Referring to Figure 2 and Figure 3 , the material is injected from the feeding hole 112, and the material flows to the inside of the mixing tank 11. A heating device is arranged inside the mixing tank 11 for improving the fluidity of the material in the mixing tank 11. After adding the material to the preset amount, stop feeding and seal the feeding hole 112.

[0035] Among them, the heating device can be a resistance wire heating tube or other heating devices, as long as it can heat the inside of the mixing tank 11. It is prior art and will not be elaborated too much in this embodiment.

[0036] Refer to Figure 2 and Figure 3 At the upper end of the mixing tank 11, a second motor 114 is provided. A stirring rod is provided on the output shaft of the second motor 114. The stirring rod extends into the interior of the mixing tank 11. Stirring blades are provided on the circumferential direction of the stirring rod for stirring the materials, thereby improving the fluidity of the materials.

[0037] Refer to Figure 3 and Figure 4 Operate the vacuum pump 113 to start, evacuate the inside of the mixing tank 11, extract the gas inside the mixing tank 11, and discharge the bubbles in the materials, thereby improving the quality of the subsequent crucible products.

[0038] Refer to Figure 3 and Figure 4 On the material injection table 2, a clamping device for fixing the mold 3 is provided to fix the mold 3 on the material injection table 2. The clamping device is a prior art and will not be elaborated too much in this embodiment.

[0039] Refer to Figures 3 to 5 Pressurize the inside of the mixing tank 11 by using the pressurizing assembly 4; the pressurizing assembly 4 includes a cylinder 41 vertically arranged at the upper end of the mixing tank 11. Both ends in the length direction of the cylinder 41 are closed. A pressurizing pipe 411 is connected between one end of the cylinder 41 close to the mixing tank 11 and the mixing tank 11. A piston block 415 slides in the cylinder 41. The circumference of the piston block 415 fits with the cylinder 41. A blocking plate 412 for opening and closing the pressurizing pipe 411 is slidably connected in the cylinder 41. The blocking plate 412 is located above the pressurizing pipe 411. An air inlet 413 is opened on the cylinder 41. A gas blocking plate 414 for opening and closing the air inlet 413 is slidably connected to the cylinder 41. Before pressurization, first close the pressurizing pipe 411 by using the blocking plate 412.

[0040] Refer to Figures 3 to 5 A hydraulic cylinder 417 is provided at one end of the cylinder 41 away from the mixing tank 11. The piston rod of the hydraulic cylinder 417 is fixedly connected to the piston block 415. By operating the piston rod of the hydraulic cylinder 417 to retract, the piston block 415 is driven to move in a direction away from the mixing tank 11; after moving to a preset position, the air inlet 413 can be closed and the pressurizing pipe 411 can be opened.

[0041] Refer to Figures 3 to 5, a first gear 5 is rotatably connected inside the air cylinder 41. On one side in the length direction of the gear shifting plate 412, a first rack 4121 meshing with the first gear 5 is provided. A second gear 51 is rotatably connected inside the air cylinder 41. On the side of the air blocking plate 414 close to the second gear 51, a second rack 4141 is arranged. The second gear 51 is meshed with the second rack 4141. A third gear 52 is rotatably connected inside the air cylinder 41. When the first rack 4121 moves to the position of the third gear 52, it meshes with the third gear 52. The nozzle of the pressure pipe 411 is located between the first gear 5 and the third gear 52. At the upper end of the third gear 52, a first bevel gear 521 is coaxially and fixedly connected. On the second gear 51, a second bevel gear 511 is coaxially and fixedly connected. The second bevel gear 511 meshes with the first bevel gear 521. A first motor 53 is arranged inside the air cylinder 41. The output shaft of the first motor 53 is coaxially and fixedly connected with the first gear 5; Refer to Figures 3 to 5 , by operating the rotation of the output shaft of the first motor 53, the first gear 5 is driven to rotate, then the first rack 4121 and the gear shifting plate 412 are driven to move, then the third gear 52 is driven to rotate, then the first bevel gear 521 is driven to rotate, then the second bevel gear 511 is driven to rotate, then the second gear 51 is driven to rotate, then the second rack 4141 and the air blocking plate 414 are driven to move. The air inlet 413 is blocked by the air blocking plate 414 to complete the sealing of the air inlet 413, and the first rack 4121 disengages from the third gear 52; continue to operate the first gear 5 to rotate, drive the first rack 4121 and the gear shifting plate 412 to move, and open the nozzle of the pressure pipe 411. At this time, the air cylinder 41 is communicated with the stirring tank 11, and the pressurization can start.

[0042] Refer to Figures 3 to 5 , operate the piston rod of the hydraulic cylinder 417 to extend, then drive the piston to move. Under the pressure of the piston, the gas flows into the inside of the stirring tank 11. As the pressure in the stirring tank 11 becomes higher, the materials in the stirring tank 11 flow to the outside of the discharge hole 21 (refer to Figure 2 ) and are squeezed into the inside of the mold 3.

[0043] Refer to Figures 3 to 5 , a limiting ring 416 is arranged inside the air cylinder 41. The outside of the limiting ring 416 is fixedly connected with the inner wall of the air cylinder 41. When the piston block 415 moves to the limiting ring 416, it abuts against the limiting ring 416. The air inlet 413, the pressure pipe 411, the gear shifting plate 412, and the air blocking plate 414 are all located below the limiting ring 416. As the piston block 415 moves to the position abutting against the limiting ring 416, it means that the feeding of one crucible is completed.

[0044] Refer to Figures 3 to 5 , after the materials are shaped, remove the mold 3 from the feeding table 2 and cut off the solidified materials at the feeding port.

[0045] Referring to Figures 3 to 5 , after placing the next mold 3 on the injection table 2, before injecting material into the next mold 3, the drive motor is manipulated again to start rotating the first gear 5, thereby driving the first rack 4121 and the gear plate 412 to move. The gear plate 412 blocks the pressure pipe 411. When the first rack 4121 moves to the position of the third gear 52, it drives the third gear 52, the first bevel gear 521, the second bevel gear 511, and the second gear 51 to rotate. During the movement of the gear plate 412, the pressure pipe 411 remains in a closed state. As the second gear 51 rotates, it drives the second rack 4141 and the air baffle 414 to move, exposing the air inlet 413, and air can enter the air cylinder 41. Then, after the piston block 415 is restored, the gear plate 412 can be restored to pressurize the mixing tank 11.

[0046] The embodiment of the present application also discloses a feeding method for a crucible used in superalloy casting, including the following steps: S1: Inject materials into the mixing tank 11 through the feeding hole 112. After adding to the preset amount, stop feeding and seal the feeding hole 112; S2: Turn on the vacuum pump 113 to pump the gas inside the mixing tank 11 to the outside, and pump the bubbles contained in the materials to the outside of the mixing tank 11; S3: Open the discharge hole 21, place a gasket at the upper end of the discharge hole 21, place the mold 3 on the gasket, align the feeding hole 31 with the discharge hole 21, and use the clamping device to clamp the mold 3 on the injection table 2; S4: Open the pressure pipe 411, manipulate the air cylinder 41 to pump air into the mixing tank 11, and use air pressure to discharge the materials from the discharge hole 21 and enter the mold 3; S5: After the materials are shaped, release the fixation of the mold 3 and remove the mold 3 from the injection table.

[0047] The above are all the preferred embodiments of the present application. The protection scope of the present application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A crucible injection device for high temperature alloy casting, comprising a workbench (1) and an injection platform (2), characterized in that: The workbench (1) is provided with a stirring box (11), the injection platform (2) is provided with a discharge hole (21), and a injection pipe (111) is connected between the discharge hole (21) and the stirring box (11). The mold (3) is detachably connected to the injection platform (2), and the mold (3) is provided with a feed hole (31) corresponding to the discharge hole (21). The stirring box (11) is provided with a feed hole (112), and the stirring box (11) is connected with a vacuum pump (113). A pressurizing component (4) is also provided at the upper end of the stirring box (11) for squeezing the material inside the stirring box (11) to the outside of the discharge hole (21).

2. The crucible filling device for high temperature alloy casting according to claim 1, characterized in that: The pressurizing component (4) comprises an air cylinder (41) vertically arranged at the upper end of the mixing box (11), both ends of the air cylinder (41) in the length direction are closed, one end of the air cylinder (41) close to the mixing box (11) is connected to the mixing box (11) by a pressurizing pipe (411), a piston block (415) is slidably arranged in the air cylinder (41), the circumference of the piston block (415) is in contact with the air cylinder (41), a shift plate (412) for opening and closing the pressurizing pipe (411) is slidably connected in the air cylinder (41), and the shift plate (412) is located above the pressurizing pipe (411), an air inlet (413) is opened on the air cylinder (41), and an air baffle plate (414) for opening and closing the air inlet (413) is slidably connected to the air cylinder (41).

3. The crucible filling device for high temperature alloy casting according to claim 2, characterized in that: A limiting ring (416) is arranged inside the gas cylinder (41), and the outside of the limiting ring (416) is fixedly connected to the inner wall of the gas cylinder (41). When the piston block (415) moves to the limiting ring (416), it abuts against the limiting ring (416), and the air inlet (413), the pressure tube (411), the shift plate (412), and the air baffle plate (414) are all located below the limiting ring (416).

4. The crucible filling device for high temperature alloy casting according to claim 2, characterized in that: A hydraulic cylinder (417) is provided at one end of the air cylinder (41) away from the mixing box (11), and a piston rod of the hydraulic cylinder (417) is fixedly connected to a piston block (415).

5. The crucible filling device for high temperature alloy casting according to claim 2, characterized in that: A gear (5) is rotatably connected inside the air cylinder (41), and a rack (4121) meshing with the gear (5) is provided on one side of the shift plate (412) in the length direction.

6. The crucible filling device for high temperature alloy casting according to claim 2, characterized in that: The air cylinder (41) is rotatably connected with a second gear (51), and a second rack (4141) is arranged on one side of the air baffle plate (414) close to the second gear (51), and the second gear (51) is meshed with the second rack (4141).

7. The crucible filling device for high temperature alloy casting according to claim 5, characterized in that: The air cylinder (41) is rotatably connected with gear three (52), and the rack one (4121) meshes with gear three (52) when it moves to the position of gear three (52). The pipe mouth of the pressure tube (411) is located between gear one (5) and gear three (52). The upper end of gear three (52) is coaxially fixedly connected with bevel gear one (521), and gear two (51) is coaxially fixedly connected with bevel gear two (511), and bevel gear two (511) and bevel gear one (521) are meshed with each other.

8. The crucible filling device for high temperature alloy casting according to claim 2, characterized in that: A motor 1 (53) is arranged inside the air cylinder (41), and an output shaft of the motor 1 (53) is coaxially fixedly connected to the gear 1 (5).

9. A method for injecting material into a crucible for high temperature alloy casting, characterized in that: Using the crucible injection device for high-temperature alloy casting as claimed in claim 8 to inject material into the mold (3) comprises the following steps: S1: injecting material into the mixing box (11) from the feeding hole (112), and after adding a preset amount, stopping the injection and sealing the feeding hole (112); S2: Turn on the vacuum pump (113) to pump the gas inside the mixing box (11) to the outside, and pump the bubbles contained in the material to the outside of the mixing box (11); S3: opening the discharge hole (21), placing a gasket above the discharge hole (21), placing the mold (3) on the gasket, aligning the feed hole (31) with the discharge hole (21), and clamping the mold (3) on the injection platform (2) using a clamping device; S4: Open the pressure tube (411), operate the air cylinder (41) to pump air into the mixing box (11), and use the air pressure to discharge the material from the discharge hole (21) and enter the mold (3); S5: After the material is shaped, the mold (3) is released and the mold (3) is removed from the injection station.

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