Automatic slurry dipping device for silica sol shell manufacturing for valve casting

Abstract

The utility model relates to a silica sol shell-making automatic slurry dipping device for valve casting, which comprises a case, a slurry dipping machine, a sand spraying machine and a wax mould, the slurry dipping machine and the sand spraying machine are distributed on the left side and the right side of the case, a first servo motor is mounted in the case, a first rotating shaft is arranged at the side output end of the first servo motor, a reduction gearbox is mounted in the case, and a second rotating shaft is arranged at the side output end of the second servo motor. A first bearing is installed on the top of the machine box. A rotating frame is fixedly connected to the side surface of the main shaft. An electric cylinder is installed on the side edge of the rotating frame. A fixing plate is installed at the bottom of the electric cylinder. A second servo motor is installed at the bottom of the fixing plate. The bottom output end of the second servo motor is provided with a third rotating shaft, the bottom of the third rotating shaft is fixedly connected with a placing frame, the top of the wax mold is provided with a mold frame, manual operation is reduced, manpower is saved, slurry dipping and sand spraying are coordinated, the shell making requirement is met, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of valve casting, in particular to an automatic slurry dipping device for silica sol shell making in valve casting. Background Technique

[0002] The commonly used precision casting in the valve industry is investment casting. The medium-temperature wax silica sol shell-making process in investment casting is suitable for producing precision parts with small surface roughness values and high dimensional accuracy, and has become the mainstream process and is widely used. Investment casting, also known as lost-wax casting, usually coats several layers of refractory materials on the surface of the wax pattern. After it hardens and dries, the wax pattern inside is melted away to make a mold shell, which is then calcined and then poured to obtain a casting. The utility model patent with the application number CN202220952345.7 discloses an automatic slurry dipping device for silica sol shell making, including a device main body. A placing cylinder is fixedly connected to the left bottom inside the device main body. A stirring rod is rotatably connected to the inner cavity of the placing cylinder. The middle of the bottom of the device main body is fixedly connected with a motor. The output end of the motor penetrates through the bottom of the device main body. The output end of the motor is drivingly connected to the bottom of the stirring rod through a first belt pulley assembly. And a sealing ring is fixed at the connection of the first belt pulley assembly and the placing cylinder. A vortex chamber is fixedly connected to the right bottom inside the device main body. The output end of the motor is connected to the vortex chamber through a second belt pulley assembly. A hot gas delivery pipe is fixedly connected to the left side of the top of the vortex chamber. And the hot gas delivery pipe is communicated with the upper end of the right side of the placing cylinder. A cold gas delivery pipe is fixedly connected to the lower left side of the vortex chamber; A collecting plate is fixedly connected to the right side inside the device main body. And the bottom of the collecting plate is fixedly connected to the bottom of the device main body. A baffle is fixedly connected to the right side of the collecting plate. And a closed space is formed below the baffle and the collecting plate. The cold gas delivery pipe penetrates through the right bottom of the collecting plate and is communicated with the closed space; The collecting plate includes a plate body. A plurality of collecting grooves are opened on the top of the plate body. A collecting groove is fixedly connected to the right side of the plurality of collecting grooves. And the plurality of collecting grooves are communicated with the collecting groove. A convex plate is arranged on the top of the plate body and between the two plate bodies. And electric heating wires are arranged inside the plurality of convex plates; A sliding seat is fixedly connected to the right bottom of the inner cavity of the device main body. A collecting box is slidably connected to the top of the sliding seat. And the top of the collecting box is communicated with the collecting groove. And the cold gas delivery pipe penetrates through the inside of the sliding seat; A plurality of ventilation holes are opened below the right side of the device main body. A liquid inlet is fixedly connected to the upper left side of the placing cylinder. A liquid discharge port is fixedly connected to the lower left side of the placing cylinder; A cross plate is fixedly connected to the top inside the device main body. Slide ways are fixedly connected to the front and rear of the bottom of the cross plate. Hydraulic components are slidably connected to the front and rear two slide ways. Mechanical claws are fixedly connected to the bottoms of the two hydraulic components. And the mechanical claws are existing mature technologies; An observation window is opened above the front side of the device main body. A control panel is fixedly connected to the lower front side of the device main body. A pull-open door is hinged to the front side of the device main body and on the right side of the control panel. However, the entire process lacks sand spraying operation, and cooling and air drying are carried out separately after slurry dipping, which is difficult to meet the needs of shell making. Content of the Utility Model

[0003] The utility model aims to solve the problems existing in the above-mentioned prior art, and provides an automatic slurry dipping device for silica sol shell making in valve casting, which can reduce manual operation, save labor, coordinate the operations of slurry dipping and sand spraying, meet the needs of shell making and improve the operation efficiency.

[0004] The technical solution adopted by the present utility model to solve its technical problems: This automatic slurry dipping device for silica sol shell making in valve casting includes a machine case, a slurry dipping machine, a sand spraying machine, and a wax pattern. The slurry dipping machine and the sand spraying machine are distributed on the left and right sides of the machine case. A first servo motor is installed inside the machine case. A first rotating shaft is provided at the side output end of the first servo motor. A speed reducer is installed inside the machine case. The first rotating shaft reaches inside the speed reducer. A second rotating shaft is provided at the top output end of the speed reducer. A coupling is provided at the top of the second rotating shaft. A main shaft is provided at the top of the coupling. A first bearing is installed on the top of the machine case. The inner ring of the first bearing is connected to the main shaft. A rotating frame is fixedly connected to the side surface of the main shaft. Two electric cylinders are installed on the side of the rotating frame. A fixing plate is installed at the bottom of the electric cylinders. A second servo motor is installed at the bottom of the fixing plate. A third rotating shaft is provided at the bottom output end of the second servo motor. A placing rack is fixedly connected to the bottom of the third rotating shaft. A mold frame is provided at the top of the wax pattern. The mold frame is installed at the bottom of the placing rack. There are two wax patterns, two mold frames, two placing racks, two second servo motors, and two fixing plates respectively. The two wax patterns are respectively directly above the slurry dipping machine and the sand spraying machine. The wax pattern and the mold frame are integral parts. The two mold frames are respectively installed at the bottoms of the two placing racks. When one of the wax patterns is directly above the slurry dipping machine, the corresponding electric cylinder extends and runs, driving the fixing plate, the second servo motor, the placing rack, the mold frame, and the wax pattern to move downward. The wax pattern is submerged in the slurry containing silica sol in the slurry dipping machine. The second servo motor is started in due course. The third rotating shaft, the placing rack, the mold frame, and the wax pattern rotate slowly in the forward and reverse directions synchronously, making the slurry dipping process uniform. The electric cylinder contracts and runs, driving the wax pattern to move upward. The wax pattern disengages from the inside of the slurry dipping machine. When the surface of the wax pattern no longer drips slurry or drips a small amount of slurry, the first servo motor runs. The first rotating shaft acts on the speed reducer. The second rotating shaft of the speed reducer acts on the coupling and the main shaft. The main shaft rotates 180 degrees. The rotating frame, the electric cylinder, the fixing plate, the second servo motor, the placing rack, the mold frame, and the wax pattern rotate 180 degrees synchronously. The wax pattern with slurry adheres to and rotates to be directly above the sand spraying machine. The electric cylinder extends and runs. The wax pattern with slurry reaches inside the sand spraying machine for sand spraying. At the same time, the other wax pattern is performing the slurry dipping operation. After the sand spraying is completed, the electric cylinder contracts and runs. After the electric cylinder stops, the mold frame and the molded part that has completed slurry dipping and sand spraying are taken down together and placed elsewhere for air drying. A new mold frame and wax pattern are reinstalled. The first servo motor runs again. The other wax pattern with slurry reaches the sand spraying machine for sand spraying. The third wax pattern reinstalled is performing the slurry dipping operation. This process repeats continuously. The whole process reduces manual operation and saves labor. The slurry dipping and sand spraying are coordinated in operation, meeting the needs of shell making and improving the operation efficiency.

[0005] For further improvement, the main shaft is at the center position between the two electric cylinders. The distances from the two electric cylinders to the main shaft are equal. The center of gravity of the rotating frame is inside the main shaft. The weights on the left and right sides of the main shaft are equal, enhancing the balance of the main shaft and the rotating frame.

[0006] For further improvement, the rotating frame is kept horizontal, and the main shaft is perpendicular to the rotating frame, ensuring that the two wax molds rotate at the same height and avoiding differences in height positions.

[0007] For further improvement, a reinforcing plate is fixedly connected inside the chassis. A second bearing is arranged inside the reinforcing plate, and the inner ring of the second bearing is connected to the main shaft. The reinforcing plate and the second bearing increase the strength between the main shaft and the chassis, further improving the support effect.

[0008] For further improvement, a clamping groove is formed on the front side of the placement rack. A clamping block is fixedly connected to the top of the mold rack, and the clamping block is inserted into the clamping groove. Two extension blocks are fixedly connected to the front side of the placement rack. The two extension blocks provide effective positioning. The mold rack is quickly installed by using the clamping block and the clamping groove, with simple operation and labor saving. The mold rack is easily removed, saving time.

[0009] For further improvement, a hand-tightening bolt is arranged on the side of the placement rack. A through hole is formed on the side of the placement rack, and a threaded groove is formed on the side of the clamping block. The hand-tightening bolt is threadedly connected to the threaded groove through the through hole. The clamping block is fixed in the clamping groove by using the hand-tightening bolt, so that the mold rack and the wax mold are fixed at the bottom of the placement rack, increasing safety and preventing the clamping block from being disengaged from the clamping groove due to force.

[0010] For further improvement, a guide post is fixedly connected to the top of the fixing plate. A guide sleeve is arranged at the bottom of the rotating frame. An activity hole is formed at the top of the rotating frame, and the guide sleeve communicates with the activity hole. The guide post moves inside the guide sleeve and the activity hole. The guide post and the guide sleeve interact, effectively restricting the electric cylinder during the extension and contraction process. The fixing plate, the second servo motor, the placement rack, the mold rack and the wax mold remain perpendicular during the up and down movement, reducing shaking and deviation.

[0011] For further improvement, there are four guide posts. One fixing plate is connected to two guide posts. The two guide posts are distributed on the left and right sides of the electric cylinder. The distances from the electric cylinder to the two guide posts are equal, and the acting forces of the two guide posts are equal. The balanced acting forces of the two guide posts further improve the stability.

[0012] The beneficial effects of the utility model are:

[0013] 1. With the wax mold and the mold base being an integral part, the two mold bases are respectively installed at the bottoms of the two placement racks. One of the wax molds is directly above the slurry dipping machine, and the corresponding electric cylinder extends to drive the fixed plate, the second servo motor, the placement rack, the mold base, and the wax mold to move downward. The wax mold is submerged in the slurry containing silica sol in the slurry dipping machine. The second servo motor is started in due course, and the third rotating shaft, the placement rack, the mold base, and the wax mold rotate slowly in the forward and reverse directions synchronously, making the slurry dipping process uniform. The electric cylinder contracts to drive the wax mold to move upward, and the wax mold disengages from the inside of the slurry dipping machine. When the surface of the wax mold no longer drips slurry or drips only a small amount of slurry, the first servo motor operates. The first rotating shaft acts on the speed reducer, and the second rotating shaft of the speed reducer acts on the coupling and the main shaft. The main shaft rotates 180 degrees, and the rotating frame, the electric cylinder, the fixed plate, the second servo motor, the placement rack, the mold base, and the wax mold rotate 180 degrees synchronously. The wax mold with slurry adheres to and rotates to move to directly above the sand spraying machine. The electric cylinder extends to make the wax mold with slurry reach the inside of the sand spraying machine for sand spraying. At the same time, the other wax mold is performing the slurry dipping operation. After the sand spraying is completed, the electric cylinder contracts. After the electric cylinder stops, the mold base and the mold parts that have completed the slurry dipping and sand spraying are removed together and placed elsewhere for air drying. A new mold base and wax mold are reinstalled. The first servo motor operates again, and the other wax mold with slurry reaches the sand spraying machine for sand spraying. The reinstalled third wax mold is performing the slurry dipping operation. This process repeats continuously, reducing manual operation and saving labor. The slurry dipping and sand spraying are coordinated to meet the needs of shell making and improve work efficiency.

[0014] 2. Effective positioning is provided through two extension blocks. The mold base is quickly installed using the clamping block and the clamping groove, with simple operation and labor saving. The mold base is easily removed, saving time. The clamping block is fixed in the clamping groove by hand-tightening bolts, so that the mold base and the wax mold are fixed at the bottom of the placement rack, increasing and decreasing safety to avoid the clamping block being forced to disengage from the clamping groove.

[0015] 3. Through the interaction between the guide post and the guide sleeve, the electric cylinder is effectively restricted during the extension and contraction processes. The fixed plate, the second servo motor, the placement rack, the mold base, and the wax mold remain vertical during the up and down movement, reducing shaking and deviation. The distances from the electric cylinder to the two guide posts are equal, and the acting forces of the two guide posts are equal. The balanced acting forces of the two guide posts further improve stability. Description of the Drawings

[0016] Figure 1 is the structural schematic diagram of the present utility model;

[0017] Figure 2 is the Figure 1 enlarged view at A in

[0018] Figure 3 is the Figure 1 enlarged view at B in

[0019] Figure 4 is the front structural view of the present utility model;

[0020] Figure 5 of the present utility model Figure 4 is the enlarged view at position C;

[0021] Figure 6 is the left structural view of the present utility model;

[0022] Figure 7 of the present utility model Figure 6 is the enlarged view at position D;

[0023] Figure 8 is the activity display diagram of the hand-tightening bolt of the present utility model.

[0024] Explanation of reference numerals: 1, chassis; 2, slurry applicator; 3, sand sprayer; 4, wax mold; 5, first servo motor; 6, first rotating shaft; 7, speed reducer; 8, second rotating shaft; 9, coupling; 10, main shaft; 11, first bearing; 12, rotating frame; 13, electric cylinder; 14, fixing plate; 15, second servo motor; 16, third rotating shaft; 17, placing rack; 18, mold rack; 19, reinforcing plate; 20, second bearing; 21, card slot; 22, card block; 23, extension block; 24, hand-tightening bolt; 25, through hole; 26, thread groove; 27, guide post; 28, guide sleeve; 29, activity hole. Detailed implementation manners

[0025] The following is further described in conjunction with the attached Figures 1-8 drawings for this embodiment:

[0026] As Figures 1-8As shown in the figure: In this embodiment, an automatic slurry dipping device for silica sol shell making in valve casting includes a chassis 1, a slurry dipping machine 2, a sand spraying machine 3 and a wax mold 4. The slurry dipping machine 2 and the sand spraying machine 3 are distributed on the left and right sides of the chassis 1. A first servo motor 5 is installed inside the chassis 1. A first rotating shaft 6 is provided at the side output end of the first servo motor 5. A speed reducer 7 is installed inside the chassis 1. The first rotating shaft 6 reaches inside the speed reducer 7. A second rotating shaft 8 is provided at the top output end of the speed reducer 7. A coupling 9 is provided at the top of the second rotating shaft 8. A main shaft 10 is provided at the top of the coupling 9. A first bearing 11 is installed on the top of the chassis 1. The inner ring of the first bearing 11 is connected to the main shaft 10. A rotating frame 12 is fixedly connected to the side surface of the main shaft 10. Two electric cylinders 13 are installed on the side of the rotating frame 12. A fixing plate 14 is installed at the bottom of the electric cylinder 13. A second servo motor 15 is installed at the bottom of the fixing plate 14. A third rotating shaft 16 is provided at the bottom output end of the second servo motor 15. A placing rack 17 is fixedly connected to the bottom of the third rotating shaft 16. A mold frame 18 is provided at the top of the wax mold 4. The mold frame 18 is installed at the bottom of the placing rack 17. There are two wax molds 4, two mold frames 18, two placing racks 17, two second servo motors 15 and two fixing plates 14 respectively. The two wax molds 4 are respectively directly above the slurry dipping machine 2 and the sand spraying machine 3. The main shaft 10 is at the center position between the two electric cylinders 13. The distances from the two electric cylinders 13 to the main shaft 10 are equal. The rotating frame 12 is kept horizontal. The main shaft 10 is perpendicular to the rotating frame 12. A reinforcing plate 19 is fixedly connected inside the chassis 1. A second bearing 20 is provided inside the reinforcing plate 19. The inner ring of the second bearing 20 is connected to the main shaft 10.

[0027] As Figure 2 、 Figure 7 and Figure 8 shown: A clamping groove 21 is formed on the front side of the placing rack 17. A clamping block 22 is fixedly connected to the top of the mold frame 18. The clamping block 22 is inserted into the clamping groove 21. Two extension blocks 23 are fixedly connected to the front side of the placing rack 17. A hand-tightening bolt 24 is provided on the side of the placing rack 17. A through hole 25 is formed on the side of the placing rack 17. A threaded groove 26 is formed on the side of the clamping block 22. The hand-tightening bolt 24 is threadedly connected to the threaded groove 26 through the through hole 25.

[0028] As Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 6 shown: Guide columns 27 are fixedly connected to the top of the fixing plate 14. Guide sleeves 28 are provided at the bottom of the rotating frame 12. An activity hole 29 is formed at the top of the rotating frame 12. The guide sleeve 28 communicates with the activity hole 29. The guide columns 27 move inside the guide sleeve 28 and the activity hole 29. There are four guide columns 27. One fixing plate 14 is connected to two guide columns 27. The two guide columns 27 are distributed on the left and right sides of the electric cylinder 13.

[0029] When the utility model is in use: the wax pattern 4 and the mold frame 18 are integral parts. Lift or raise the integral part of the wax pattern 4 and the mold frame 18. The column of the mold frame 18 passes between the two extension blocks 23. The clamping block 22 reaches the tops of the two extension blocks 23 first. Hold the placement rack 17 and the mold frame 18 with both hands respectively, and push the clamping block 22 forward to reach the inside of the card slot 21. Obtain the hand-tightening bolt 24. The hand-tightening bolt 24 passes through the through hole 25, and the hand-tightening bolt 24 is threadedly connected with the thread groove 26, so that the clamping block 22 is fixed in the card slot 21, and the mold frame 18 and the wax pattern 4 are fixed at the bottom of the placement rack 17. Refer to this operation to complete the installation of the two mold frames 18 at the bottom of the two placement racks 17 respectively. One of the wax patterns 4 is directly above the slurry dipping machine 2, and the corresponding electric cylinder 13 extends and operates, driving the fixed plate 14, the second servo motor 15, the placement rack 17, the mold frame 18 and the wax pattern 4 to move downward. The guide post 27 and the guide sleeve 28 interact with each other, and the electric cylinder 13 is effectively restricted during the extension process. The fixed plate 14, the second servo motor 15, the placement rack 17, the mold frame 18 and the wax pattern 4 remain vertical during the downward movement, reducing shaking and offset. The wax pattern 4 is submerged in the slurry containing silica sol in the slurry dipping machine 2. Appropriately start the second servo motor 15, and the third rotating shaft 16, the placement rack 17, the mold frame 18 and the wax pattern 4 rotate slowly forward and backward synchronously, making the slurry dipping process uniform. The electric cylinder 13 contracts and operates, driving the wax pattern 4 to move upward. The wax pattern 4 disengages from the inside of the slurry dipping machine 2. When the surface of the wax pattern 4 no longer drips slurry or drips a small amount of slurry, the first servo motor 5 operates. The first rotating shaft 6 acts on the speed reducer 7, and the second rotating shaft 8 of the speed reducer 7 acts on the coupling 9 and the main shaft 10. The main shaft 10 rotates 180 degrees. The rotating frame 12, the electric cylinder 13, the fixed plate 14, the second servo motor 15, the placement rack 17, the mold frame 18 and the wax pattern 4 rotate 180 degrees synchronously. The wax pattern 4 with slurry reaches directly above the sand spraying machine 3. The electric cylinder 13 extends and operates, and the wax pattern 4 with slurry reaches the inside of the sand spraying machine 3 for sand spraying. At the same time, another wax pattern 4 is performing the slurry dipping operation. After the sand spraying is completed, the electric cylinder 13 contracts and operates. After the electric cylinder 13 stops, unscrew the hand-tightening bolt 24. Hold the placement rack 17 and the mold frame 18 with both hands respectively, and pull out the clamping block 22 from the card slot 21, and remove the mold frame 18 and the molded part that has completed slurry dipping and sand spraying together, and place them elsewhere for air drying. Reinstall the new mold frame 18 and wax pattern 4. The first servo motor 5 operates again, and another wax pattern 4 with slurry reaches the sand spraying machine 3 for sand spraying. The third reinstalled wax pattern 4 is performing the slurry dipping operation. This process is repeated in a cycle. The whole process reduces manual operation and saves manpower. The slurry dipping and sand spraying are coordinated to meet the needs of shell making and improve work efficiency.

[0030] Although the present utility model has been illustrated and described by reference to the preferred embodiments, those skilled in the art should understand that various changes in form and details may be made within the scope of the claims.

Claims

1. An automatic slurry dipping device for silica sol shell making in valve casting, comprising a machine case (1), a slurry dipping machine (2), a sand spraying machine (3) and a wax pattern (4), characterized in that: The slurry dipping machine (2) and the sand spraying machine (3) are distributed on the left and right sides of the chassis (1). A first servo motor (5) is installed inside the chassis (1). A first rotating shaft (6) is provided at the side output end of the first servo motor (5). A speed reducer (7) is installed inside the chassis (1). The first rotating shaft (6) reaches inside the speed reducer (7). A second rotating shaft (8) is provided at the top output end of the speed reducer (7). A coupling (9) is provided at the top of the second rotating shaft (8). A main shaft (10) is provided at the top of the coupling (9). A first bearing (11) is installed on the top of the chassis (1). The inner ring of the first bearing (11) is connected to the main shaft (10). A rotating frame (12) is fixedly connected to the side surface of the main shaft (10). Electric cylinders (13) are installed on the side of the rotating frame (12). There are two electric cylinders (13). A fixing plate (14) is installed at the bottom of the electric cylinders (13). A second servo motor (15) is installed at the bottom of the fixing plate (14). A third rotating shaft (16) is provided at the bottom output end of the second servo motor (15). A placing rack (17) is fixedly connected to the bottom of the third rotating shaft (16). A mold frame (18) is provided at the top of the wax mold (4). The mold frame (18) is installed at the bottom of the placing rack (17). There are two wax molds (4), two mold frames (18), two placing racks (17), two second servo motors (15) and two fixing plates (14) respectively. The two wax molds (4) are respectively directly above the slurry dipping machine (2) and the sand spraying machine (3).

2. The automatic slurry dipping device for silica sol shell making in valve casting according to claim 1, wherein: The main shaft (10) is at the central position between the two electric cylinders (13), and the distances from the two electric cylinders (13) to the main shaft (10) are equal.

3. An automatic slurry dipping device for silica sol shell making in valve casting according to claim 1, characterized in that: The rotating frame (12) is kept horizontal, and the main shaft (10) is perpendicular to the rotating frame (12).

4. The automatic slurry dipping device for silica sol shell making in valve casting according to claim 1, characterized in that: A reinforcing plate (19) is fixedly connected inside the chassis (1). A second bearing (20) is provided inside the reinforcing plate (19). The inner ring of the second bearing (20) is connected to the main shaft (10).

5. The automatic slurry dipping device for silica sol shell making in valve casting according to claim 1, characterized in that: A clamping groove (21) is formed at the front side of the placing rack (17). A clamping block (22) is fixedly connected to the top of the mold frame (18). The clamping block (22) is inserted into the clamping groove (21). Extension blocks (23) are fixedly connected to the front side of the placing rack (17). There are two extension blocks (23).

6. The automatic slurry dipping device for silica sol shell making in valve casting according to claim 5, characterized in that: A hand-tightening bolt (24) is provided at the side of the placing rack (17). A through hole (25) is formed at the side of the placing rack (17). A threaded groove (26) is formed at the side of the clamping block (22). The hand-tightening bolt (24) is threadedly connected to the threaded groove (26) through the through hole (25).

7. An automatic slurry dipping device for silica sol shell making in valve casting according to claim 1, characterized in that: A guide post (27) is fixedly connected to the top of the fixing plate (14). A guide sleeve (28) is provided at the bottom of the rotating frame (12). An activity hole (29) is formed at the top of the rotating frame (12). The guide sleeve (28) communicates with the activity hole (29). The guide post (27) moves inside the guide sleeve (28) and the activity hole (29).

8. An automatic slurry dipping device for silica sol shell making in valve casting according to claim 7, characterized in that: There are four guide posts (27). One fixing plate (14) is connected to two guide posts (27), and the two guide posts (27) are distributed on the left and right sides of the electric cylinder (13).

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