A lifting sand box for a sand mold 3D printer

Abstract

This invention discloses a lifting sand box for a sand mold 3D printer, comprising a box body, a top frame fixedly installed on the top of the box body, two first screws movably sleeved inside one side of the top frame, and two second screws movably sleeved inside the other side of the top frame. A sprocket is fixedly sleeved on the outer side of the top of each of the two first and second screws, and a chain is sleeved on the outer side of the sprocket. A motor is installed at the top of each of the two second screws. Through an air pump, when sand cleaning inside the box becomes difficult, the air pump's input end draws airflow from the guide plate and the bottom box through a connecting pipe and a vent, facilitating the creation of negative pressure. This makes the sand flow through the feed pipe more efficient. The airflow then flows through a U-shaped pipe into the bottom of the internal partition of the box, applying positive pressure to the sand that needs to be discharged, facilitating its ejection. This increases cleaning efficiency and cleanliness, resulting in good overall performance and reducing the labor intensity of operators.

Description

Technical Field

[0001] This invention belongs to the field of 3D sand mold printing technology, specifically relating to a lifting sand box for a sand mold 3D printer. Background Technology

[0002] Sand molds are casting cavities made of raw sand, binders, and other auxiliary materials during the casting production process. 3D printing technology, a type of rapid prototyping technology, is a technique that uses digital model files as a basis and employs powdered metals or plastics and other bondable materials to construct objects by stacking them layer by layer. Compared to traditional sand mold manufacturing processes, 3D printing technology has higher work efficiency; this has made the desire to apply 3D printing technology to the field of sand casting increasingly urgent.

[0003] In the process of 3D printing sand molds, in order to facilitate the operation of 3D printing, the sand box of the lifting sand box will have residual sand falling from the gap of the lifting platform after printing or during printing, which affects the cleanliness of the working environment. The cleaning of waste sand is done manually, which is inefficient. At the same time, it is not convenient to collect, thus causing inconvenience. Based on this, we propose a lifting sand box for sand mold 3D printers. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the present invention aims to provide a lifting sand box for a sand mold 3D printer, which solves the problems of residual sand in the sand box, and the inefficiency and inconvenience of manually cleaning up waste sand.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a lifting sand box for a sand mold 3D printer, comprising a box body, a top frame fixedly installed on the top of the box body, two first screws movably sleeved inside one side of the top frame, and two second screws movably sleeved inside the other side of the top frame, sprockets fixedly sleeved on the outer sides of the top ends of the two first screws and the second screws, and chains sleeved on the outer sides of the sprockets, motors mounted on the top ends of the two second screws, transmission wheels fixedly installed on the top ends of the two second screws away from the motors and the top ends of the first screws, and transmission belts sleeved on the outer sides of the transmission wheels, threaded cylinders threadedly connected to the outer sides of the two first screws and the second screws, partitions fixedly installed on the outer sides of the threaded cylinders, sealing cone rings fixedly installed on the top of the threaded cylinders, sealing frames fixedly installed on the outer sides of the partitions, sealing cone strips fixedly installed on the top and bottom of the sealing frames, and a plurality of feeding pipes connected to the bottom of the partitions. The tube is equipped with a second solenoid valve. A base box is fixedly installed at the bottom of the box. Mounting plates are fixedly installed on the outer sides of the top and bottom of the base box. A guide plate is fixedly installed inside the base box. A side door is movably installed on one side of the base box. A discharge pipe is connected to the bottom of the box. An electric valve is installed inside the discharge pipe. An air pump is fixedly installed at the bottom of the inner cavity of the base box. The input end of the air pump is connected to a connecting pipe. Several vent holes are opened inside the other end of the connecting pipe. The output end of the air pump is connected to a U-shaped pipe. A connecting pipe is connected to the top of the connecting pipe and the U-shaped pipe. A fourth solenoid valve is installed inside the connecting pipe. A first solenoid valve is installed at the end of the connecting pipe near the air pump. A third solenoid valve is installed at the end of the U-shaped pipe near the air pump. An external connecting pipe is connected to the outer side of the U-shaped pipe. A valve is installed inside the external connecting pipe. An external solenoid valve is installed inside the end of the U-shaped pipe away from the air pump. A viewing window is provided on one side of the box.

[0006] Preferably, the motor is fixedly mounted on the top of the top frame by a bracket.

[0007] The advantage of adopting the above technical solution is that it facilitates structural stability.

[0008] Preferably, the sealing cone ring is movably sleeved on the outside of the first screw and the second screw.

[0009] By adopting the above technical solution, the advantage is that it increases the sealing effect at the top of the threaded cylinder, which makes it easier to maintain the stability of the structure and its use.

[0010] Preferably, the sealing cone is fixedly installed at the top and bottom of the partition, and the sealing frame and the sealing cone are movably sleeved inside the box.

[0011] The advantage of adopting the above technical solution is that it makes it easier to reduce sand accumulation and has a good overall effect.

[0012] Preferably, both the first screw and the second screw are movably sleeved inside the top frame via bearings, and the bottom ends of both the first screw and the second screw are fixed to the bottom of the inner cavity of the housing via bearing seats.

[0013] The advantages of adopting the above technical solution are that it facilitates transmission and maintains stability, resulting in good performance.

[0014] Preferably, the feed pipes are rectangular and evenly distributed at the bottom of the partition.

[0015] By adopting the above technical solution, the advantage is that the flow is concentrated on the inside of the side door, which facilitates diversion and collection, and the effect is good.

[0016] Preferably, one end of the deflector plate is inclined toward the inside of the side door.

[0017] By adopting the above technical solution, the advantages are improved overall performance, stability, and ease of use.

[0018] Preferably, one end of the connecting pipe is L-shaped, passing through the guide plate and fixedly installed at the top of the bottom chamber cavity, and the end of the U-shaped pipe away from the air pump is connected to the inside of the chamber.

[0019] By adopting the above technical solution, the advantages are increased cleaning efficiency and cleanliness, good overall performance, and reduced labor intensity for operators.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. With the mounting plate in place, the operator first installs the device on the printer. During operation, the motor starts, driving the second screw to rotate. The second screw then rotates via a sprocket and chain drive, which in turn drives the first screw on the other side via a drive wheel and belt. The first screw maintains its rotation via the sprocket and chain, ensuring synchronized rotation of the first and second screws. This applies torque to the threaded cylinder, which, in turn, drives the partition to move up and down within its stable position inside the sleeve housing, adjusting the height for optimal sand mold printing. Simultaneously, the sealing cone ring prevents sand from entering the threaded cylinder, and the sealing cone and frame ensure structural stability, reduce sand leakage, and enhance overall structural stability. This combination of features ensures good performance.

[0022] 2. With the feed pipe in place, when the sand needs to be cleaned after printing, the second solenoid valve inside the feed pipe opens, allowing the sand to flow through the feed pipe to the bottom of the partition. The electric valve is then opened to discharge the sand through the discharge pipe, making it easier to guide the sand to the top of the guide plate. Finally, the sand gathers on the inside of the side door for easy flow, increasing the convenience of flow guidance and collection, and improving the performance.

[0023] 3. When the sand inside the box is difficult to clean, the air pump can be activated. The air pump's input end draws air from the guide plate and the bottom box through the connecting pipe and vent, which facilitates the formation of negative pressure. This makes the sand in the discharge pipe more efficient. Then, the airflow is guided through the U-shaped pipe to the bottom of the internal partition of the box, applying positive pressure to the sand that needs to be discharged, which facilitates the sand to be pushed out. This increases the cleaning efficiency and cleanliness, and the overall effect is good, which helps to reduce the labor intensity of the operators. Attached Figure Description

[0024] Figure 1 This is a front-view stereoscopic appearance structural diagram of the present invention;

[0025] Figure 2 This is a rear-view stereoscopic view of the structure of the present invention;

[0026] Figure 3 This is a schematic diagram of the front cross-sectional structure of the present invention;

[0027] Figure 4 This is a schematic diagram of the right-side cross-sectional structure of the present invention;

[0028] Figure 5 For the present invention Figure 3 Enlarged structural diagram at point A in the middle;

[0029] Figure 6 For the present invention Figure 3 Enlarged structural diagram at point B.

[0030] In the diagram: 1. Housing; 2. Sprocket; 3. First Screw; 4. Second Screw; 5. Motor; 6. Chain; 7. Drive Wheel; 8. Drive Belt; 9. Top Frame; 10. Mounting Plate; 11. Bottom Box; 12. First Solenoid Valve; 13. External Solenoid Valve; 14. Valve; 15. External Connecting Pipe; 16. U-shaped Pipe; 17. Viewing Window; 18. Connecting Pipe; 19. Air Pump; 20. Side Door; 21. Second Solenoid Valve; 22. Third Solenoid Valve; 23. Vent Hole; 24. Discharge Pipe; 25. Guide Plate; 26. Connecting Pipe; 27. Electric Valve; 28. Partition Plate; 29. ​​Discharge Pipe; 30. Sealing Cone; 31. Sealing Cone Ring; 32. Threaded Sleeve; 33. Sealing Frame; 34. Fourth Solenoid Valve. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] like Figures 1-6 As shown, a lifting sand box for a sand mold 3D printer includes a box body 1. A top frame 9 is fixedly installed on the top of the box body 1. Two first screws 3 are movably sleeved inside one side of the top frame 9, and two second screws 4 are movably sleeved inside the other side of the top frame 9. A sprocket 2 is fixedly sleeved on the outer side of the top of each of the two first screws 3 and the two second screws 4. A chain 6 is sleeved on the outer side of the sprocket 2. A motor 5 is installed on the top of each of the two second screws 4. A chain 6 is fixedly installed on the top of each of the two second screws 4 away from the top of the motor 5 and the top of the first screw 3. A transmission wheel 7 is fitted with a transmission belt 8 on its outer side. Threaded cylinders 32 are threadedly connected to the outer sides of both first screws 3 and second screws 4. A partition plate 28 is fixedly installed on the outer side of the threaded cylinder 32. A sealing cone ring 31 is fixedly installed on the top of the threaded cylinder 32. A sealing frame 33 is fixedly installed on the outer side of the partition plate 28. Sealing cone strips 30 are fixedly installed on the top and bottom of the sealing frame 33. Several feed pipes 29 are connected to the bottom of the partition plate 28. A second solenoid valve 21 is installed inside the feed pipe 29. The bottom of the housing 1... A base box 11 is fixedly installed. Mounting plates 10 are fixedly installed on the outer sides of the top and bottom of the base box 11. A guide plate 25 is fixedly installed inside the base box 11. A side door 20 is movably installed on one side of the base box 11. A discharge pipe 24 is connected to the bottom of the box 1. An electric valve 27 is installed inside the discharge pipe 24. An air pump 19 is fixedly installed at the bottom of the inner cavity of the base box 11. A connecting pipe 26 is connected to the input end of the air pump 19. Several vent holes 23 are opened inside the other end of the connecting pipe 26. The output end of the air pump 19 is connected to a U... The top of the U-shaped tube 16, the connecting tube 26, and the U-shaped tube 16 are connected to a connecting tube 18. A fourth solenoid valve 34 is installed inside the connecting tube 18. A first solenoid valve 12 is installed at the end of the connecting tube 26 near the air pump 19. A third solenoid valve 22 is installed at the end of the U-shaped tube 16 near the air pump 19. An external connecting pipe 15 is connected to the outside of the U-shaped tube 16. A valve 14 is installed inside the external connecting pipe 15. An external solenoid valve 13 is installed inside the end of the U-shaped tube 16 away from the air pump 19. A viewing window 17 is provided on one side of the housing 1.

[0033] The working principle of the above technical solution is as follows:

[0034] In use, the operator first installs the device on the printer using the mounting plate 10. Then, during operation, the motor 5 starts and drives the second screw 4 to rotate. After the second screw 4 rotates, it is driven to rotate through the sprocket 2 and chain 6, and through the transmission wheel 7 and transmission belt 8, it drives the first screw 3 on the other side to rotate. The first screw 3 is kept rotating through the sprocket 2 and chain 6, so that the first screw 3 and the second screw 4 rotate synchronously. Then, the thread torque is applied to the inside of the threaded cylinder 32. Through the transmission of the threaded cylinder 32, and in a stable position inside the sleeve box 1 of the partition 28, the partition 28 is moved up and down to adjust the height position, which is convenient for height matching during sand mold printing. At the same time, the sealing cone ring 31 can ensure that sand does not enter the inside of the threaded cylinder 32, and the sealing cone 30 and sealing frame 33 can ensure the stability of the structure, reduce sand leakage, increase the stability of the structure, facilitate mutual cooperation, and have good performance.

[0035] In another implementation scheme, such as Figure 1 and Figure 2 As shown, the motor 5 is fixedly mounted on the top of the top frame 9 by a bracket.

[0036] Motor 5 provides overall support torque and stability, facilitating structural stability.

[0037] In another implementation scheme, such as Figure 5 As shown, the sealing cone ring 31 is movably sleeved on the outside of the first screw 3 and the second screw 4.

[0038] The sealing cone ring 31 is threadedly connected to the first screw 3 and the second screw 4, which increases the sealing effect at the top of the threaded cylinder 32, making it easier to maintain the stability of the structure and its use.

[0039] In another implementation scheme, such as Figures 3-5 As shown, the sealing cone 30 is fixedly installed on the top and bottom of the partition 28, and the sealing frame 33 and the sealing cone 30 are movably sleeved inside the housing 1.

[0040] The sealing cone 30 and sealing frame 33 provide a seal for the outside of the partition 28 and prevent sand from getting into the gaps, which helps to improve the separation effect of the partition 28, reduce the possibility of sand accumulation, and improve the overall performance.

[0041] In another implementation scheme, such as Figures 1-4 As shown, the two first screws 3 and the second screw 4 are movably connected to the inside of the top frame 9 through bearings, and the bottom ends of the two first screws 3 and the second screw 4 are fixed to the bottom of the inner cavity of the housing 1 through bearing seats.

[0042] The first screw 3 and the second screw 4 are mounted on the relative positions of the housing 1 and the top frame 9 via bearings and bearing seats, which facilitates transmission and maintains stability, resulting in good performance.

[0043] In another implementation scheme, such as Figure 3 and Figure 4 As shown, the feed pipes 29 are evenly distributed in a rectangular shape at the bottom of the partition plate 28.

[0044] When sand needs to be cleaned after printing via the feed pipe 29, the second solenoid valve 21 inside the feed pipe 29 opens, allowing the sand to flow through the feed pipe 29 to the bottom of the partition 28. The electric valve 27 is then opened to discharge the sand through the discharge pipe 24, facilitating the flow of the sand to the top of the guide plate 25. Finally, the sand gathers inside the side door 20 for easy flow, increasing the convenience of flow guidance and collection, and resulting in good performance.

[0045] In another implementation scheme, such as Figure 3 As shown, one end of the deflector 25 is inclined toward the inside of the side door 20.

[0046] The side door 20 opens to facilitate the even flow of discharged sand, improving the overall performance and ensuring stability and ease of use.

[0047] In another implementation scheme, such as Figure 3 and Figure 6 As shown, one end of the connecting pipe 26 is L-shaped and passes through the guide plate 25 and is fixedly installed on the top of the inner cavity of the bottom box 11. The end of the U-shaped pipe 16 away from the air pump 19 is connected to the inside of the box 1.

[0048] When cleaning sand inside the housing 1 becomes difficult, the air pump 19 can be activated. The input end of the air pump 19 draws air from the guide plate 25 and the bottom box 11 through the connecting pipe 26 and the vent 23, which facilitates the formation of negative pressure. This makes the sand guided by the discharge pipe 29 more efficient. Then, the airflow is guided through the U-shaped pipe 16 into the bottom of the partition 28 inside the housing 1, which applies positive pressure to the sand that needs to be discharged, making it easier to push the sand out. This increases the cleaning efficiency and cleanliness, and the overall effect is good, which helps to reduce the labor intensity of the operators.

[0049] The working principle and usage process of this invention: In use, the operator first installs the device on the printer using the mounting plate 10. Then, during operation, the motor 5 starts and drives the second screw 4 to rotate. After the second screw 4 rotates, it is driven to rotate through the sprocket 2 and chain 6, and through the transmission wheel 7 and transmission belt 8, it drives the first screw 3 on the other side to rotate. The first screw 3 is kept rotating through the sprocket 2 and chain 6, so that the first screw 3 and the second screw 4 rotate synchronously. Then, the thread torque is applied to the inside of the threaded cylinder 32. Through the transmission of the threaded cylinder 32, and in a stable position inside the sleeve housing 1 of the partition 28, the partition 28 is moved up and down to adjust the height position, which is convenient for height matching during sand mold printing. At the same time, the sealing cone ring 31 can ensure that sand does not enter the inside of the threaded cylinder 32, and the sealing cone 30 and sealing frame 33 can ensure the stability of the structure, reduce sand leakage, increase the stability of the structure, facilitate mutual cooperation, and have good use effect. When sand needs to be cleaned after printing, the second solenoid valve 21 inside the feed pipe 29 opens, allowing sand to flow through the feed pipe 29 to the bottom of the partition 28. The electric valve 27 is opened to discharge the sand through the discharge pipe 24, facilitating the flow of sand to the top of the guide plate 25. Finally, the sand gathers inside the side door 20 for easy flow, increasing the convenience of flow and collection and improving the performance. The air pump 19 can be activated when cleaning sand inside the box 1 becomes difficult. The input end of the air pump 19 draws air from the guide plate 25 and the bottom box 11 through the connecting pipe 26 and the vent 23, creating negative pressure to make the flow of sand through the feed pipe 29 more efficient. Then, the airflow is guided through the U-shaped pipe 16 to the bottom of the partition 28 inside the box 1, applying positive pressure to the sand that needs to be discharged, facilitating the discharge of sand and increasing the cleaning efficiency and cleanliness. The overall performance is good and it helps to reduce the labor intensity of the operators.

[0050] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A lifting sand box for a sand mold 3D printer, comprising a box body (1), characterized in that: A top frame (9) is fixedly installed on the top of the housing (1). Two first screws (3) are movably sleeved inside one side of the top frame (9), and two second screws (4) are movably sleeved inside the other side of the top frame (9). A sprocket (2) is fixedly sleeved on the outer side of the top of each of the two first screws (3) and the two second screws (4). A chain (6) is sleeved on the outer side of the sprocket (2). A motor (5) is installed on the top of each of the two second screws (4). A transmission wheel (7) is fixedly installed on the top of each of the two second screws (4) away from the motor (5) and the top of the first screw (3). A transmission belt (8) is sleeved on the outer side of the transmission wheel (7). The outer sides of the two first screws (3) and the second screw (4) are threaded with threaded cylinders (32). A partition (28) is fixedly installed on the outer side of the threaded cylinder (32). A sealing cone ring (31) is fixedly installed on the top of the threaded cylinder (32). A sealing frame (33) is fixedly installed on the outer side of the partition (28). A sealing cone strip (30) is fixedly installed on the top and bottom of the sealing frame (33). A plurality of feed pipes (29) are connected to the bottom of the partition (28). A second solenoid valve (21) is installed inside the feed pipe (29). A bottom box (11) is fixedly installed on the bottom of the box (1). 1) Mounting plates (10) are fixedly installed on the outer sides of the top and bottom. A guide plate (25) is fixedly installed inside the bottom box (11). A side door (20) is movably installed on one side of the bottom box (11). A discharge pipe (24) is connected to the bottom of the box (1). An electric valve (27) is installed inside the discharge pipe (24). An air pump (19) is fixedly installed at the bottom of the inner cavity of the bottom box (11). A connecting pipe (26) is connected to the input end of the air pump (19). Several vent holes (23) are opened inside the other end of the connecting pipe (26). A U-shaped pipe (16) is connected to the output end of the air pump (19). The top of the tube (26) and the U-shaped tube (16) are connected by a connecting tube (18), and a fourth solenoid valve (34) is installed inside the connecting tube (18). A first solenoid valve (12) is installed at the end of the connecting tube (26) near the air pump (19). A third solenoid valve (22) is installed at the end of the U-shaped tube (16) near the air pump (19). An external pipe (15) is connected to the outside of the U-shaped tube (16). A valve (14) is installed inside the external pipe (15). An external solenoid valve (13) is installed inside the end of the U-shaped tube (16) away from the air pump (19). A viewing window (17) is provided on one side of the housing (1). The sealing cone ring (31) is movably sleeved on the outside of the first screw (3) and the second screw (4); The sealing cone (30) is fixedly installed on the top and bottom of the partition (28), and the sealing frame (33) and the sealing cone (30) are movably sleeved inside the box (1).

2. The lifting sand box of a sand mold 3D printer according to claim 1, characterized in that: The motor (5) is fixedly mounted on the top of the top frame (9) by a bracket.

3. The lifting sand box of a sand mold 3D printer according to claim 1, characterized in that: Both first screws (3) and second screws (4) are movably sleeved inside the top frame (9) through bearings, and the bottom ends of both first screws (3) and second screws (4) are fixed to the bottom of the inner cavity of the housing (1) through bearing seats.

4. The lifting sand box of a sand mold 3D printer according to claim 1, characterized in that: The feed pipe (29) is rectangular and evenly distributed at the bottom of the partition (28).

5. The lifting sand box of a sand mold 3D printer according to claim 1, characterized in that: One end of the deflector (25) is inclined toward the inside of the side door (20).

6. The lifting sand box of a sand mold 3D printer according to claim 1, characterized in that: One end of the connecting pipe (26) is L-shaped and passes through the guide plate (25) and is fixedly installed on the top of the inner cavity of the bottom box (11). The end of the U-shaped pipe (16) away from the air pump (19) is connected to the inside of the box body (1).

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