Sand unloading mechanism at bottom of evanescent mode casting sand box

Abstract

The utility model provides a sand unloading mechanism at the bottom of an evanescent mode casting sand box, and relates to the technical field of evanescent mode casting. The evanescent mode casting sand box bottom sand unloading mechanism comprises two supporting frames. According to the evanescent mode casting sand box bottom sand unloading mechanism, a driving motor drives one first chain wheel to rotate, then one first chain drives one second chain wheel to rotate, one third chain wheel is made to rotate, the second chain drives the other third chain wheel to rotate, and the other second chain wheel is made to rotate; then the other first chain drives the other first chain wheel to rotate, the two first chain wheels can drive two reciprocating lead screws to rotate correspondingly, so that two moving blocks are driven to ascend and descend, a cleaning frame is driven to move through two L-shaped connecting plates and two vertical plates, and residual sand in the sand box body is scraped; and the sand box body can be effectively cleaned only by arranging one power source, so that the production cost is effectively reduced, and the practicability is improved.

Description

Technical Field

[0001] The utility model relates to a sand unloading mechanism, in particular to a sand unloading mechanism at the bottom of a lost foam casting sand box, belonging to the technical field of lost foam casting. Background Art

[0002] Lost foam casting is a solid casting method that uses a foam plastic mold with binderless molding sand combined with vacuum technology. It is a new casting method that combines foam models with similar size and shape to the casting into a model cluster, brushes refractory coating and dries it, buries it in dry quartz sand and vibrates it to shape it, and pours it under negative pressure to vaporize the model, so that the liquid metal occupies the model position and forms a casting after solidification and cooling.

[0003] CN219052859U discloses a sand unloading mechanism for a lost foam casting sand box, comprising a base, a double-axis motor fixedly connected to the bottom of the base, two output ends of the double-axis motor respectively fixedly connected to a gear, a sand box slidably connected to one side of the base, two sides of the sand box meshing with the outer surface of the gear, four corners of the sand box respectively fixedly connected to an electric telescopic rod, and the output ends of the four electric telescopic rods fixedly connected to a cleaning frame.

[0004] Although there are many benefits in the above scheme, there are also the following defects: 1. After the sand unloading is completed, when the sand box is cleaned, multiple power sources are used to drive the cleaning frame for cleaning, which requires high production costs and reduces the practicality of the device; 2. When unloading sand, the raw materials will fall directly from the base through the movement of the sand box, which is easy to generate a certain amount of dust, which is harmful to the health of the staff and the use effect is not very good. Utility Model Content

[0005] 1. Technical issues to be solved

[0006] The purpose of the utility model is to provide a lost foam casting sand box bottom unloading mechanism in order to solve the above-mentioned problem, so as to solve the problem that when cleaning the sand box in the prior art, multiple power sources are used to drive the cleaning frame for cleaning, which requires high production costs and reduces the practicability of the device.

[0007] (II) Technical solution

[0008] The utility model is realized by the following technical scheme: a sand unloading mechanism at the bottom of a lost foam casting sand box, comprising two support frames, a bottom plate fixedly installed between the two support frames, a sand box body slidably installed between the two support frames, the sand box body is arranged on the top of the bottom plate and in sliding contact with the bottom plate, a cleaning structure is arranged on the outside of the sand box body, the cleaning structure comprises two fixed frames, the two fixed frames are respectively fixedly installed on both sides of the sand box body, a reciprocating screw rod is rotatably installed on the inner side of the fixed frame, a moving block is connected to the outer side of the reciprocating screw rod through a nut pair, the moving block is arranged on the inner side of the fixed frame and in sliding contact with the fixed frame, an L-shaped connecting plate is fixedly installed on one side of the moving block, a vertical plate is fixedly installed on one side of the L-shaped connecting plate, a cleaning frame is fixedly installed on the bottom of the two vertical plates, the cleaning frame is arranged on the inner side of the sand box body and in sliding contact with the sand box body, and the sand box body is hollow in design up and down, so that the sand box can drive the raw material on the bottom plate to move to one side of the bottom plate when moving horizontally and then fall down to complete the sand unloading.

[0009] Preferably, one end of the moving block passes through the fixed frame and is fixedly installed with a No. 1 sprocket, two placement plates are fixedly installed on one side of the sand box body, and a No. 2 sprocket is rotatably installed on the top of the placement plate. A No. 1 chain is sleeved on the outer sides of the No. 1 sprocket and the No. 2 sprocket, and the No. 1 sprocket and the No. 2 sprocket are connected by transmission via the No. 1 chain.

[0010] Preferably, a No. 3 sprocket is fixedly mounted on the top of the No. 2 sprocket, a No. 2 chain is sleeved on the outer sides of the two No. 3 sprockets, and the two No. 3 sprockets are connected by transmission via the No. 2 chain.

[0011] Preferably, an L-shaped support plate is fixedly installed on the top of the sand box body, a drive motor is fixedly installed on the top of the L-shaped support plate, and an output end of the drive motor passes through the L-shaped support plate and is fixedly connected to one of the No. 1 sprockets.

[0012] Preferably, racks are fixedly installed on both sides of the sand box body, respectively passing through two support frames; gears are rotatably installed on one side of the two support frames; the two racks are respectively meshed with two gears; a connecting shaft is rotatably installed between the two support frames; both ends of the connecting shaft respectively pass through the two support frames and are respectively fixedly connected to the two gears; a placing frame is fixedly installed on one side of one of the support frames; a forward and reverse motor is fixedly installed on one side of the placing frame; the output end of the forward and reverse motor passes through the placing frame and is fixedly connected to one of the gears.

[0013] Preferably, a buffer structure is arranged between the two support frames, and the buffer structure includes a rotating shaft, two fixed seats and two limit blocks. The rotating shaft is rotatably installed between the two support frames, and a buffer plate is fixedly installed on the outer side of the rotating shaft. The two fixed seats are respectively fixedly installed on one side of the two support frames, and two arc-shaped limit columns are fixedly installed on one side of the buffer plate. An arc spring is fixedly installed between the fixed seat and the buffer plate, and the two limit blocks are respectively fixedly installed on one side of the two support frames. The arcs of the arc springs and the arc-shaped limit columns are both arranged with the rotating shaft as the center. The two limit blocks can limit the buffer plate to prevent the buffer plate from rotating too much under the elastic action of the two arc springs, thereby preventing the buffer plate from falling onto the buffer plate when blanking.

[0014] Preferably, the fixed seat is provided with a sliding groove, and the two arc-shaped limit columns are respectively arranged inside the two sliding grooves and respectively in sliding contact with the two fixed seats. The arc-shaped limit columns can limit the arc spring to prevent the arc spring from being deformed and twisted due to long-term use.

[0015] The utility model provides a lost foam casting sand box bottom unloading mechanism, which has the following beneficial effects:

[0016] 1. The bottom sand unloading mechanism of the lost foam casting sand box drives one of the No. 1 sprockets to rotate through a driving motor, and then drives one of the No. 2 sprockets to rotate through one of the No. 1 chains, so that one of the No. 3 sprockets rotates, and then drives another No. 3 sprocket to rotate through the No. 2 chain, so that another No. 2 sprocket rotates, and then drives another No. 1 sprocket to rotate through another No. 1 chain. The two No. 1 sprockets will respectively drive two reciprocating screws to rotate, thereby driving two moving blocks to perform lifting movements, and driving the cleaning frame to move through two L-shaped connecting plates and two vertical plates to scrape off the residual sand inside the sand box body. Only one power source needs to be set to effectively clean the sand box body, which effectively reduces production costs and improves practicality.

[0017] 2. The sand unloading mechanism at the bottom of the lost foam casting sand box, through the gravity effect of the raw materials and the elastic action of two arc springs, the raw materials falling on the buffer plate will slowly press the buffer plate down, causing its angle to change, so that it slides down from the buffer plate and falls into the collection box, effectively preventing the impact of the direct fall of the raw materials from generating dust that causes certain harm to the health of the workers, thereby improving the use effect of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is a cross-sectional view of the overall structure of the utility model;

[0020] Figure 3 This is a schematic diagram of the cleaning structure of the utility model;

[0021] Figure 4 For this utility model Figure 3 A-section structure enlarged view

[0022] Figure 5 For this utility model Figure 3 A magnified view of the structure of part B;

[0023] Figure 6 It is a schematic diagram of the buffer structure of the utility model.

[0024]

Main component symbol description

[0025] 1. Support frame; 2. Bottom plate; 3. Sand box body; 4. Rack; 5. Gear; 6. Connecting shaft; 7. Placement frame; 8. Forward and reverse motor; 9. Fixed frame; 10. Reciprocating screw; 11. Moving block; 12. L-shaped connecting plate; 13. Vertical plate; 14. Cleaning frame; 15. Sprocket No. 1; 16. L-shaped support plate; 17. Driving motor; 18. Chain No. 1; 19. Sprocket No. 2; 20. Placement plate; 21. Sprocket No. 3; 22. Chain No. 2; 23. Rotating shaft; 24. Buffer plate; 25. Fixed seat; 26. Arc limit column; 27. Arc spring; 28. Limit block. DETAILED DESCRIPTION

[0026] The utility model embodiment provides a sand unloading mechanism at the bottom of a lost foam casting sand box.

[0027] See also Figure 1-6 , including two support frames 1, a bottom plate 2 is fixedly installed between the two support frames 1, a sand box body 3 is slidably installed between the two support frames 1, the sand box body 3 is arranged on the top of the bottom plate 2 and in sliding contact with the bottom plate 2, and a cleaning structure is arranged on the outside of the sand box body 3, and the cleaning structure includes two fixed frames 9, the two fixed frames 9 are respectively fixedly installed on both sides of the sand box body 3, a reciprocating screw rod 10 is rotatably installed on the inner side of the fixed frame 9, and a moving block 11 is connected to the outer side of the reciprocating screw rod 10 through a nut pair, the moving block 11 is arranged on the inner side of the fixed frame 9 and in sliding contact with the fixed frame 9, an L-shaped connecting plate 12 is fixedly installed on one side of the moving block 11, a vertical plate 13 is fixedly installed on one side of the L-shaped connecting plate 12, and a cleaning frame 14 is fixedly installed on the bottom of the two vertical plates 13, and the cleaning frame 14 is arranged on the inner side of the sand box body 3 and in sliding contact with the sand box body 3.

[0028] In this embodiment, one end of the moving block 11 passes through the fixed frame 9 and is fixedly installed with a No. 1 sprocket 15. Two placement plates 20 are fixedly installed on one side of the sand box body 3. A No. 2 sprocket 19 is rotatably installed on the top of the placement plate 20. A No. 1 chain 18 is sleeved on the outer side of the No. 1 sprocket 15 and the No. 2 sprocket 19. The No. 1 sprocket 15 and the No. 2 sprocket 19 are connected by transmission through the No. 1 chain 18.

[0029] In this embodiment, a third sprocket 21 is fixedly mounted on the top of the second sprocket 19 , a second chain 22 is sleeved on the outer sides of the two third sprockets 21 , and the two third sprockets 21 are transmission-connected via the second chain 22 .

[0030] In this embodiment, an L-shaped support plate 16 is fixedly installed on the top of the sand box body 3, and a drive motor 17 is fixedly installed on the top of the L-shaped support plate 16. The output end of the drive motor 17 passes through the L-shaped support plate 16 and is fixedly connected to one of the No. 1 sprockets 15.

[0031] In this embodiment, racks 4 are fixedly installed on both sides of the sand box body 3, respectively passing through two support frames 1. Gears 5 are rotatably installed on one side of the two support frames 1. The two racks 4 are respectively meshed with the two gears 5. A connecting shaft 6 is rotatably installed between the two support frames 1. The two ends of the connecting shaft 6 respectively pass through the two support frames 1 and are respectively fixedly connected to the two gears 5. A placing frame 7 is fixedly installed on one side of one of the support frames 1, and a forward and reverse motor 8 is fixedly installed on one side of the placing frame 7. The output end of the forward and reverse motor 8 passes through the placing frame 7 and is fixedly connected to one of the gears 5.

[0032] In this embodiment, a buffer structure is arranged between the two support frames 1, and the buffer structure includes a rotating shaft 23, two fixed seats 25 and two limit blocks 28. The rotating shaft 23 is rotatably installed between the two support frames 1, and a buffer plate 24 is fixedly installed on the outer side of the rotating shaft 23. The two fixed seats 25 are respectively fixedly installed on one side of the two support frames 1, and two arc-shaped limit columns 26 are fixedly installed on one side of the buffer plate 24. An arc spring 27 is fixedly installed between the fixed seat 25 and the buffer plate 24, and the two limit blocks 28 are respectively fixedly installed on one side of the two support frames 1.

[0033] In this embodiment, the fixing seat 25 is provided with a sliding groove, and two arc-shaped limiting columns 26 are respectively disposed inside the two sliding grooves and are respectively in sliding contact with the two fixing seats 25 .

[0034] It should be noted that the utility model is a sand unloading mechanism for the bottom of a lost foam casting sand box. When unloading sand, a collection box is placed between the two support frames 1 and below the buffer plate 24, and the forward and reverse motors 8 are started. The model of the forward and reverse motors 8 is not described in detail, and the adapted equipment shall prevail. The forward and reverse motors 8 will drive one of the gears 5 to rotate, and then drive the other gear 5 to rotate through the connecting shaft 6, thereby driving the two racks 4 to mesh and move, to drive the sand box body 3 to move, and drive the raw materials on the top of the bottom plate 2 to fall from one side of the bottom plate 2, and the fallen raw materials will fall to the top of the buffer plate 24, and then through the gravity effect of the raw materials and the elastic effect of the two arc springs 27, the raw materials falling on the buffer plate 24 will slowly press the buffer plate 24 down, causing its angle to change, thereby sliding down from the buffer plate 24 and falling into the collection box, effectively preventing the impact of the direct fall of the raw materials from generating dust that causes certain harm to the health of the staff, and improving the use effect of the device;

[0035] When the sand unloading is completed, the sand box body 3 is cleaned, and the driving motor 17 is started. The model of the driving motor 17 is not described in detail, and it shall be subject to the adapted equipment. The driving motor 17 will drive one of the No. 1 sprockets 15 to rotate, and then drive one of the No. 2 sprockets 19 to rotate through one of the No. 1 chains 18, so that one of the No. 3 sprockets 21 is rotated, and then the other No. 3 sprocket 21 is driven to rotate through the No. 2 chain 22, so that the other No. 2 sprocket 19 is rotated, and then the other No. 1 sprocket 15 is driven to rotate through another No. 1 chain 18. The two No. 1 sprockets 15 will respectively drive the two reciprocating screw rods 10 to rotate, thereby driving the two moving blocks 11 to perform lifting movements, and drive the cleaning frame 14 to move through the two L-shaped connecting plates 12 and the two vertical plates 13 to scrape off the residual sand inside the sand box body 3. Only one power source needs to be set to effectively clean the sand box body 3, which effectively reduces the production cost and improves the practicality.

[0036] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A sand unloading mechanism for a lost foam casting sand box bottom, comprising two support frames (1), characterized in that: A bottom plate (2) is fixedly installed between the two support frames (1), a sand box body (3) is slidably installed between the two support frames (1), the sand box body (3) is arranged on the top of the bottom plate (2) and is in sliding contact with the bottom plate (2), a cleaning structure is arranged on the outside of the sand box body (3), and the cleaning structure includes two fixed frames (9), the two fixed frames (9) are respectively fixedly installed on both sides of the sand box body (3), and a reciprocating screw rod (10) is rotatably installed on the inner side of the fixed frame (9), and the reciprocating screw rod (10) is rotatably installed on the inner side of the fixed frame (9). The outer side of the multifilament rod (10) is connected with a moving block (11) through a nut pair, the moving block (11) is arranged on the inner side of the fixed frame (9) and is in sliding contact with the fixed frame (9), an L-shaped connecting plate (12) is fixedly installed on one side of the moving block (11), a vertical plate (13) is fixedly installed on one side of the L-shaped connecting plate (12), a cleaning frame (14) is fixedly installed at the bottom of the two vertical plates (13), and the cleaning frame (14) is arranged on the inner side of the sand box body (3) and is in sliding contact with the sand box body (3).

2. The lost foam casting sand box bottom unloading mechanism according to claim 1, characterized in that: One end of the moving block (11) passes through the fixed frame (9) and is fixedly mounted with a No. 1 sprocket (15); one side of the sand box body (3) is fixedly mounted with two placement plates (20); a No. 2 sprocket (19) is rotatably mounted on the top of the placement plate (20); a No. 1 chain (18) is sleeved on the outer sides of the No. 1 sprocket (15) and the No. 2 sprocket (19); the No. 1 sprocket (15) and the No. 2 sprocket (19) are connected in transmission via the No. 1 chain (18).

3. The sand unloading mechanism at the bottom of the lost foam casting sand box according to claim 2, characterized in that: A third sprocket (21) is fixedly mounted on the top of the second sprocket (19), a second chain (22) is sleeved on the outer sides of the two third sprockets (21), and the two third sprockets (21) are connected in transmission via the second chain (22).

4. The sand unloading mechanism for lost foam casting sand box bottom according to claim 1, characterized in that: An L-shaped support plate (16) is fixedly installed on the top of the sand box body (3), and a driving motor (17) is fixedly installed on the top of the L-shaped support plate (16). The output end of the driving motor (17) passes through the L-shaped support plate (16) and is fixedly connected to one of the first sprockets (15).

5. The sand unloading mechanism at the bottom of the lost foam casting sand box according to claim 1, characterized in that: Racks (4) are fixedly installed on both sides of the sand box body (3) through the two support frames (1), and gears (5) are rotatably installed on one side of the two support frames (1). The two racks (4) are respectively meshed with the two gears (5). A connecting shaft (6) is rotatably installed between the two support frames (1), and the two ends of the connecting shaft (6) respectively penetrate the two support frames (1) and are respectively fixedly connected to the two gears (5). A placement frame (7) is fixedly installed on one side of one of the support frames (1), and a forward and reverse motor (8) is fixedly installed on one side of the placement frame (7), and the output end of the forward and reverse motor (8) penetrates the placement frame (7) and is fixedly connected to one of the gears (5).

6. The sand unloading mechanism at the bottom of the lost foam casting sand box according to claim 1, characterized in that: A buffer structure is arranged between the two support frames (1), and the buffer structure comprises a rotating shaft (23), two fixed seats (25) and two limit blocks (28); the rotating shaft (23) is rotatably mounted between the two support frames (1); a buffer plate (24) is fixedly mounted on the outer side of the rotating shaft (23); the two fixed seats (25) are respectively fixedly mounted on one side of the two support frames (1); two arc-shaped limit columns (26) are fixedly mounted on one side of the buffer plate (24); an arc-shaped spring (27) is fixedly mounted between the fixed seat (25) and the buffer plate (24); and the two limit blocks (28) are respectively fixedly mounted on one side of the two support frames (1).

7. The sand unloading mechanism at the bottom of the lost foam casting sand box according to claim 6, characterized in that: The fixing seat (25) is provided with a sliding groove, and the two arc-shaped limiting columns (26) are respectively arranged inside the two sliding grooves and are respectively in sliding contact with the two fixing seats (25).

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