Sand mould casting mixer

Abstract

The application discloses a sand mold casting stirrer and relates to the technical field of casting, and the technical scheme is as follows: a bottom plate is internally fixedly embedded with a stirring box, the top of the stirring box is provided as an open top, the top of the stirring box is provided with a connecting plate, the bottom of the connecting plate is fixedly connected with a U-shaped frame, the connecting plate is internally embedded with a rotating shaft one, and the bottom end of the rotating shaft one penetrates through the U-shaped frame and extends into the stirring box, the beneficial effects of the application are as follows: when the rotating shaft one rotates, the rotating disc can also rotate, then under the action of the connecting rod one, the connecting rod two, the pull rod, the square rod one and the spring one, the piston one can continuously move left and right, then under the action of the pipeline two, the pipeline three, the pipeline one and other components, the rotating shaft one can add water to the raw materials once every rotation, the device has the function of adding water for many times in small amounts, and water adding by workers is not needed in the stirring process, so that the labor intensity of workers can be reduced.

Description

Technical Field

[0001] This invention relates to the field of casting technology, and more specifically to a sand casting mixer. Background Technology

[0002] Casting is one of the earliest metal heat treatment processes mastered by mankind, and molding sand is the main raw material in sand casting. Molding sand can be divided into clay sand, water glass sand, cement sand, resin sand, etc., depending on the binder used. Among them, clay sand is the most widely used. Clay sand is made of natural silica sand, clay, additives and water. Clay sand needs to be mixed with a mixer during manufacturing.

[0003] Existing mixers only have the function of mixing and do not have the function of adding water to the raw materials in small amounts multiple times. This means that water needs to be added manually to the raw materials multiple times during the mixing process. The function is incomplete and the manual labor intensity is high. Therefore, it needs to be improved.

[0004] Therefore, it is necessary to invent a sand casting mixer. Summary of the Invention

[0005] Therefore, the present invention provides a sand casting mixer to solve the problems in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a sand casting mixer, comprising a base plate, a mixing chamber fixedly embedded inside the base plate, the top of the mixing chamber being open, a connecting plate being provided on the top of the mixing chamber, a U-shaped frame being fixedly connected to the bottom of the connecting plate, a rotating shaft I being embedded inside the connecting plate, the bottom end of the rotating shaft I penetrating the U-shaped frame and extending into the mixing chamber, a stirring rod being fixedly sleeved on the outside of the rotating shaft I, and levers being fixedly connected to both sides of the stirring rod, the levers being in contact with the inner wall of the mixing chamber, a motor being fixedly connected to the bottom inner wall of the U-shaped frame, a rotating shaft II being fixedly connected to the output shaft of the motor, the top end of the rotating shaft II being connected to the bottom of the connecting plate, a drive assembly being provided between the rotating shaft II and the rotating shaft I, a connecting plate being provided on the top of the connecting plate, the rotating shaft I penetrating the connecting plate, the rotating shaft I being hollow, three pipes I being fixedly embedded on both the front and rear sides of the rotating shaft I, the pipes I being located inside the mixing chamber, rubber pads being fixedly connected inside each of the six pipes I, and cross grooves being opened inside the rubber pads, the connecting... A housing is fixedly connected to the top of the plate. A rotating shaft passes through the housing and is connected to it via a sealed bearing. The rotating shaft has four evenly distributed circular through slots located inside the housing. A box is fixedly connected to the top of the connecting plate, located on one side of the housing. A piston is located inside the box. A square rod is embedded on one side of the box, with one end fixedly connected to one side of the piston. A turntable is fixedly connected to the top of the rotating shaft, and a connecting rod is fixedly connected to the top of the turntable. A square rod is fixedly connected to a connecting rod 2 at its top. A pull rod is sleeved on the outside of the connecting rod 1 and the connecting rod 2. A spring 1 is fixedly connected to the other side of the piston 1, and one end of the spring 1 is fixedly connected to the inner wall of the other side of the housing 1. A pipe 2 is fixedly embedded in the inner side of the housing 1. A one-way valve 1 is provided on the outside of the pipe 2. A water tank is fixedly connected to the top of the bottom plate. A pipe 3 is fixedly embedded in the rear side of the housing 1. One end of the pipe 3 extends into the inside of the water tank. A one-way valve 2 is provided on the outside of the pipe 3. An auxiliary component is provided on the top of the bottom plate.

[0007] Preferably, the lever is slidably connected to the mixing tank, the piston is slidably connected to the tank body, the square rod is slidably connected to the tank body, and the pull rod is connected to connecting rod one and connecting rod two via bearings.

[0008] Preferably, the drive assembly includes two sprockets and a chain. The two sprockets are respectively fixedly sleeved on the outside of the first rotating shaft and the second rotating shaft. The chain is sleeved on the outside of the two sprockets. The two sprockets are connected by a chain drive. A stabilizing block is fixedly connected to the rear side of the connecting plate. The third pipe passes through the stabilizing block and is fixedly connected to it.

[0009] Preferably, the auxiliary component includes two housings, both of which are fixedly connected to the inner side of the connecting plate and the connecting plate. Each housing has a piston, and each housing has a square rod embedded in its inner side. The outer ends of the square rods are fixedly connected to the inner sides of the pistons. An elliptical wheel is fixedly sleeved on the outside of the rotating shaft, and the elliptical wheel is embedded in the inner ends of the two square rods. The pistons are slidably connected to the housings, the square rods are slidably connected to the housings, and the elliptical wheel is slidably connected to the square rods.

[0010] Preferably, two housings are fixedly connected to the top of the base plate. The two housings are fixedly connected to both sides of the mixing tank. Each housing is equipped with a piston. Each housing is also equipped with a push rod at the top, with both ends of the push rod fixedly connected to the piston and the connecting plate, respectively. Each housing is also equipped with a flexible hose on its outer side. One end of each flexible hose is fixedly embedded on one side of the two housings. The piston is slidably connected to the housing and the push rod is slidably connected to the housing. Each piston is also equipped with a spring on one side, with one end of the spring fixedly connected to the inner wall of the housing.

[0011] Preferably, each of the two square rods has a positioning block fixedly connected to its bottom, and the top of the connecting plate has two positioning grooves. The two positioning blocks are respectively embedded in the two positioning grooves and slidably connected thereto. Each of the two box bodies has a limiting block fixedly connected to its outer side, and a limiting rod is slidably embedded inside each of the two limiting blocks. The two limiting rods are fixedly connected to the bottom of the connecting plate.

[0012] Preferably, a discharge pipe is fixedly embedded at the bottom of the mixing tank, and a switch valve is provided outside the discharge pipe. A pipe is fixedly embedded on one side of the water tank, and a switch valve is provided outside the pipe.

[0013] Preferably, support legs are fixedly connected to the four corners of the bottom of the base plate.

[0014] Preferably, the first rotating shaft is connected to the connecting plate, the connecting plate, and the U-shaped frame via bearings, and the second rotating shaft is connected to the connecting plate via bearings.

[0015] The beneficial effects of this invention are:

[0016] 1. This invention uses a motor to rotate a rotating shaft, which in turn drives the stirring rod and the lever to rotate. This stirs the raw materials inside the stirring rod. Simultaneously, the rotation of the rotating shaft causes the turntable to rotate. Under the action of connecting rod 1, connecting rod 2, pull rod, square rod 1, and spring 1, the piston 1 moves continuously left and right. Then, under the action of pipes 2, 3, and 1, water is added to the raw materials once for each rotation of the rotating shaft. Thus, this device has the function of adding water in small amounts multiple times, eliminating the need for manual water addition during the stirring process and reducing the labor intensity.

[0017] 2. By designing an auxiliary component, this invention allows the auxiliary component to operate while the rotating shaft is rotating. The operation of the auxiliary component causes the connecting plate to move up and down continuously, thereby causing the components on the connecting plate to move up and down continuously. This allows the rotating shaft, stirring rod, and lever to move up and down during stirring, thus increasing the quality of stirring and ensuring that the raw materials are fully mixed, thereby guaranteeing the quality of the finished product. Attached Figure Description

[0018] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0019] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a front sectional view provided by the present invention;

[0022] Figure 3 Provided by the present invention Figure 2 Enlarged view of point A in the image;

[0023] Figure 4 A perspective view of the components such as the rotating shaft, stirring rod, lever, and housing provided by the present invention;

[0024] Figure 5 Provided by the present invention Figure 4 Enlarged view of point B in the image;

[0025] Figure 6 An exploded perspective view of the pipe and rubber pad provided by the present invention;

[0026] Figure 7 The rear-view perspective view provided for this invention;

[0027] Figure 8 Provided by the present invention Figure 7 Enlarged view of point C in the image;

[0028] In the diagram: 1. Base plate, 2. Mixing tank, 3. Connecting plate, 4. U-shaped frame, 5. Rotating shaft one, 6. Mixing rod, 7. Paddle lever, 8. Motor, 9. Rotating shaft two, 10. Connecting plate, 11. Pipe one, 12. Rubber pad, 13. Shell, 14. Box one, 15. Piston one, 16. Square rod one, 17. Turntable, 18. Connecting rod one, 19. Connecting rod two, 20. Pull rod, 21. Spring one, 22. Pipe two, 23. One-way valve one, 24. Water tank, 25. Pipe three, 26. One-way valve two, 27. Sprocket, 28. Chain, 29. Stabilizing block, 30. Box two, 31. Piston two, 32. Square rod two, 33. Elliptical wheel, 34. Box three, 35. Piston three, 36. Hose, 37. Spring two, 38. Positioning block, 39. Limiting block, 40. Limiting rod, 41. Discharge pipe, 42. Switch valve one, 43. Pipe four, 44. Switch valve two, 45. Push rod. Detailed Implementation

[0029] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0030] See attached document Figure 1 -Appendix Figure 8The present invention provides a sand casting mixer, comprising a base plate 1, a mixing tank 2 fixedly embedded inside the base plate 1, the top of the mixing tank 2 being open, a connecting plate 3 at the top of the mixing tank 2, a U-shaped frame 4 fixedly connected to the bottom of the connecting plate 3, a first rotating shaft 5 embedded inside the connecting plate 3, the bottom end of the first rotating shaft 5 passing through the U-shaped frame 4 and extending into the mixing tank 2, a stirring rod 6 fixedly sleeved on the outside of the first rotating shaft 5, and levers 7 fixedly connected to both sides of the stirring rod 6, the levers 7 fitting against the inner wall of the mixing tank 2, a motor 8 fixedly connected to the bottom inner wall of the U-shaped frame 4, and a second rotating shaft 9 fixedly connected to the output shaft of the motor 8. The top end is connected to the bottom of the connecting plate 3. A drive assembly is provided between the second rotating shaft 9 and the first rotating shaft 5. A connecting plate 10 is provided on the top of the connecting plate 3. The first rotating shaft 5 passes through the connecting plate 10. The first rotating shaft 5 is hollow. Three pipes 11 are fixedly embedded on both the front and rear sides of the first rotating shaft 5 and the pipes 11 are located inside the mixing tank 2. Rubber pads 12 are fixedly connected inside each of the six pipes 11, and the rubber pads 12 have cross grooves inside. A shell 13 is fixedly connected to the top of the connecting plate 10. The first rotating shaft 5 passes through the shell 13 and is connected to it through a sealed bearing. Four through grooves are evenly distributed in a circular shape on the first rotating shaft 5. The through slot is located inside the housing 13. A box 14 is fixedly connected to the top of the connecting plate 10. The box 14 is located on one side of the housing 13. A piston 15 is provided inside the box 14. A square rod 16 is embedded on one side of the box 14. One end of the square rod 16 is fixedly connected to one side of the piston 15. A turntable 17 is fixedly connected to the top of the rotating shaft 15. A connecting rod 18 is fixedly connected to the top of the turntable 17. A connecting rod 29 is fixedly connected to the top of the square rod 16. A pull rod 20 is sleeved on the outside of the connecting rod 18 and the connecting rod 29. A spring 21 is fixedly connected to the other side of the piston 15, and one end of the spring 21 is connected to the box 15. The inner wall of the other side of the body 14 is fixedly connected. The inner side of the body 14 and the shell 13 is fixedly embedded with the pipe 22. The outside of the pipe 22 is provided with the one-way valve 23. The top of the bottom plate 1 is fixedly connected with the water tank 24. The rear side of the body 14 is fixedly embedded with the pipe 35. One end of the pipe 325 extends into the inside of the water tank 24. The outside of the pipe 325 is provided with the one-way valve 26. The top of the bottom plate 1 is provided with the auxiliary components. The lever 7 is slidably connected with the mixing box 2. The piston 15 is slidably connected with the body 14. The square rod 16 is slidably connected with the body 14. The pull rod 20 is connected to the connecting rod 18 and the connecting rod 29 through the bearing.

[0031] In this embodiment, the operation of motor 8 can rotate shaft 5, thereby driving the stirring rod 6 and lever 7 to rotate. This stirs the raw materials inside the stirring rod 6. At the same time, the rotation of shaft 5 can also rotate turntable 17. Then, under the action of connecting rod 18, connecting rod 29, pull rod 20, square rod 16 and spring 21, piston 15 can move left and right continuously. Then, under the action of pipe 22, pipe 325, pipe 11 and other components, water can be added to the raw materials once for each rotation of shaft 5.

[0032] To achieve the purpose of transmission, the device adopts the following technical solution: the drive assembly includes two sprockets 27 and a chain 28. The two sprockets 27 are fixedly sleeved on the outside of the rotating shaft 1 5 and the rotating shaft 2 9, respectively. The chain 28 is sleeved on the outside of the two sprockets 27. The two sprockets 27 are driven and connected by the chain 28. A stabilizing block 29 is fixedly connected to the rear side of the connecting plate 3. The pipe 3 25 passes through the stabilizing block 29 and is fixedly connected to it. The design of the chain 28 can make the rotating shaft 1 5 and the rotating shaft 2 9 rotate simultaneously.

[0033] To improve the mixing quality, the device employs the following technical solution: The auxiliary components include two housings 30, both fixedly connected to the inner sides of the connecting plate 3 and the connecting plate 10. Each housing 30 contains a piston 31, and each housing 30 has a square rod 32 embedded within it. The outer ends of the square rods 32 are fixedly connected to the inner sides of the pistons 31. An elliptical wheel 33 is fixedly fitted onto the outside of the rotating shaft 5, and the elliptical wheel 33 is embedded within the inner ends of the two square rods 32. Inside, piston 2 31 is slidably connected to housing 2 30, square rod 2 32 is slidably connected to housing 2 30, and elliptical wheel 33 is slidably connected to square rod 2 32. Two housings 34 are fixedly connected to the top of the base plate 1, and are respectively fixedly connected to both sides of the mixing tank 2. Piston 35 is installed inside each of the two housings 34. Push rods 45 are embedded in the top of each of the two housings 34, and both ends of the push rods 45 are fixedly connected to piston 35 and connecting plate 3, respectively. Flexible hoses 36 are fixedly embedded in the outer sides of each of the two housings 2 30. One end of the hose 36 is fixedly embedded in one side of each of the two boxes 34. The piston 35 is slidably connected to the box 34. The push rod 45 is slidably connected to the box 34. One side of each of the two pistons 31 is fixedly connected to a spring 37, and one end of the spring 37 is fixedly connected to the inner wall of the box 30. The bottom of each of the two square rods 32 is fixedly connected to a positioning block 38. The top of the connecting plate 3 has two positioning grooves. The two positioning blocks 38 are respectively embedded in the two positioning grooves and slidably connected to them. The outer side of each of the two boxes 34 is fixedly connected to a limit block 39. The two limit blocks 39 are slidably embedded in the two limit rods 40. The two limit rods 40 are fixedly connected to the bottom of the connecting plate 3. An auxiliary component is designed so that when the rotating shaft 5 rotates, the auxiliary component can also work. When the auxiliary component works, the connecting plate 3 can move up and down continuously, so that the components on the connecting plate 3 can move up and down continuously. In this way, when stirring, the rotating shaft 5, the stirring rod 6 and the lever 7 can move up and down, thus increasing the stirring quality during the stirring process.

[0034] In order to achieve the purpose of material discharge, the device adopts the following technical solution: a discharge pipe 41 is fixedly embedded at the bottom of the mixing tank 2, and a switch valve 42 is provided outside the discharge pipe 41. A pipe 43 is fixedly embedded on one side of the water tank 24, and a switch valve 44 is provided outside the pipe 43. The discharge pipe 41 is designed to discharge the finished product, and the pipe 43 can discharge the water in the water tank 24.

[0035] To achieve the purpose of support, the device adopts the following technical solution: support legs are fixedly connected to the four corners of the bottom of the base plate 1, and the support legs can support the device.

[0036] In order to reduce wear, the device adopts the following technical solution: the first rotating shaft 5 is connected to the connecting plate 3, the connecting plate 10 and the U-shaped frame 4 through bearings, and the second rotating shaft 9 is connected to the connecting plate 3 through bearings. The bearing connection can reduce wear.

[0037] The usage process of this invention is as follows: When using this invention, various raw materials are added to the mixing tank 2, and then water is added to the water tank 24. Subsequently, the motor 8 is controlled to work, and the motor 8 drives the rotating shaft 29 to rotate. The rotation of the rotating shaft 29 drives the chain 28 to rotate, and the rotation of the chain 28 drives the rotating shaft 15 to rotate. The rotation of the rotating shaft 15 causes the stirring rod 6 and the lever 7 to rotate, thereby stirring various raw materials. The rotation of the rotating shaft 15 also causes the turntable 17 to rotate. Since the pull rod 20 is movable with the connecting rod 18 and the connecting rod 29 through bearings, the rotation of the turntable 17 under the action of the pull rod 20 and the spring 21 causes the square rod 16 and the piston 15 to move left and right continuously. When the piston 15 moves to the left, under the action of the pipe 3 25 and the one-way valve 26, the water tank 2 is filled with water. Water from section 4 is drawn into the housing 14. When piston 15 moves to the right, the water is squeezed into housing 13 by pipe 22 and check valve 23. This cycle continuously fills housing 13 with water. The water then enters rotating shaft 5 through the through groove and is finally sprayed out through multiple pipes 11. Each pipe 11 is equipped with a rubber pad 12. Each time water is filled into housing 13, the pressure causes the rubber pad 12 to split into four pieces, and the water is sprayed into the raw material. Rotating disc 17 once causes piston 15 to move left and right once. This allows water to be added to the raw material once every time rotating shaft 5 rotates. Thus, this device has the function of adding water in small amounts multiple times. During the stirring process, manual water addition is not required, which can reduce the labor intensity.

[0038] The rotation of the rotating shaft 5 also causes the elliptical wheel 33 to rotate. Since the elliptical wheel 33 is in contact with and slidably connected to the two square rods 32, and under the limiting action of the positioning block 38 and the rebound action of the spring 37, the rotation of the elliptical wheel 33 causes the square rods 32 to move left and right continuously, thereby causing the piston 31 to move left and right continuously. Then, under the action of the two hoses 36, the air in the housing 34 and housing 2 30 can flow back and forth, thereby realizing the continuous up and down movement of the piston 35 and the push rod 45. This allows the connecting plate 3 to move up and down continuously, thereby causing the components on the connecting plate 3 to move up and down continuously. In this way, during the stirring process, the rotating shaft 5, the stirring rod 6, and the lever 7 can move up and down, thereby increasing the stirring quality and ensuring that the raw materials are fully mixed. This ensures the quality of the finished product. After the stirring is completed, the control valve 42 is opened, and the finished product can be taken out through the discharge pipe 41.

[0039] The above are merely preferred embodiments of the present invention. Any person skilled in the art may modify the present invention or modify it into an equivalent technical solution using the technical solutions described above. Therefore, any simple modifications or equivalent substitutions made based on the technical solutions of the present invention are within the scope of protection claimed by the present invention.

Claims

1. A sand mould foundry mixer comprising a base plate (1), characterised in that: The bottom plate (1) is fixedly embedded with a stirring box (2), the top of the stirring box (2) is provided as an open top, the top of the stirring box (2) is provided with a connecting plate (3), the bottom of the connecting plate (3) is fixedly connected with a U-shaped frame (4), the inside of the connecting plate (3) is embedded with a rotating shaft (5), the bottom end of the rotating shaft (5) penetrates through the U-shaped frame (4) and extends into the inside of the stirring box (2), the outside of the rotating shaft (5) is fixedly sleeved with a stirring rod (6), the two sides of the stirring rod (6) are fixedly connected with a lever (7), the lever (7) is attached to the inner wall of the stirring box (2), the bottom inner wall of the U-shaped frame (4) is fixedly connected with a motor (8), the output shaft of the motor (8) is fixedly connected with a rotating shaft (9), the top end of the rotating shaft (9) is connected with the bottom of the connecting plate (3), a driving assembly is arranged between the rotating shaft (9) and the rotating shaft (5), the top of the connecting plate (3) is provided with a connecting plate (10), the rotating shaft (5) penetrates through the connecting plate (10), the rotating shaft (5) is provided as a hollow shape, three pipe (11) are fixedly embedded on the front and rear sides of the rotating shaft (5) and the pipe (11) is located in the inside of the stirring box (2), six pipe (11) are fixedly connected with a rubber pad (12) and a cross groove is formed in the inside of the rubber pad (12), the top of the connecting plate (10) is fixedly connected with a shell (13), the rotating shaft (5) penetrates through the shell (13) and is connected therewith through a sealing bearing, four penetrating grooves are formed on the rotating shaft (5) and are evenly distributed in a circumferential shape, the top of the connecting plate (10) is fixedly connected with a box (14), the box (14) is located on one side of the shell (13), a piston (15) is arranged in the inside of the box (14), a square rod (16) is embedded on one side of the box (14), one end of the square rod (16) is fixedly connected with one side of the piston (15), a rotating disc (17) is fixedly connected with the top end of the rotating shaft (5), a connecting rod (18) is fixedly connected with the top of the rotating disc (17), a connecting rod (19) is fixedly connected with the top of the square rod (16), a pull rod (20) is sleeved with the outside of the connecting rod (18) and the connecting rod (19), the other side of the piston (15) is fixedly connected with a spring (21) and one end of the spring (21) is fixedly connected with the other side inner wall of the box (14), a pipe (22) is fixedly embedded in the inside of the box (14) and the shell (13), a one-way valve (23) is arranged on the outside of the pipe (22), a water tank (24) is fixedly connected with the top of the bottom plate (1), a pipe (25) is fixedly embedded on the rear side of the box (14), one end of the pipe (25) extends into the inside of the water tank (24), a one-way valve (26) is arranged on the outside of the pipe (25), an auxiliary assembly is arranged on the top of the bottom plate (1). The driving assembly comprises two chain wheels (27) and a chain (28), the two chain wheels (27) are fixedly sleeved outside the rotating shafts (5) and (9) respectively, the chain (28) is sleeved outside the two chain wheels (27), the two chain wheels (27) are drivingly connected through the chain (28), and the rear side of the connecting plate (3) is fixedly connected with a stable block (29).

2. A sand-moulded mixer according to claim 1, characterised in that: The stirring box (2) is slidably connected with the shifting rod (7), the box (14) is slidably connected with the piston (15), the box (14) is slidably connected with the square rod (16), and the connecting rod (18) and the connecting rod (19) are connected with the shifting rod (20) through bearings.

3. A sand-mold casting mixer according to claim 1, characterized in that: The auxiliary assembly comprises two box (30), two box (30) are fixedly connected in the connecting plate (3) and the connecting plate (10) inside, two box (30) are provided with piston (31) inside, two box (30) are embedded with square rod (32) inside, two square rod (32) are fixedly connected with two piston (31) inside respectively, the rotating shaft (5) is fixedly sleeved with an oval wheel (33) outside, the oval wheel (33) is embedded in the inner end of the two square rod (32) inside, the piston (31) is slidably connected with the box (30), the square rod (32) is slidably connected with the box (30), and the oval wheel (33) is slidably connected with the square rod (32).

4. A sand moIded mixer according to claim 3 wherein: The bottom plate (1) is fixedly connected with two box (34) on the top, two box (34) are fixedly connected on both sides of the stirring box (2) respectively, two box (34) are provided with piston (35) inside, two box (34) are embedded with push rod (45) on the top and the push rod (45) is fixedly connected with the piston (35) and the connecting plate (3) respectively, two box (30) are fixedly embedded with hose (36) outside, one end of two hose (36) is fixedly embedded in one side of two box (34) respectively, the piston (35) is slidably connected with the box (34), the push rod (45) is slidably connected with the box (34), and one side of two piston (31) is fixedly connected with spring (37) and the other end of the spring (37) is fixedly connected with the inner wall of the box (30).

5. A sand-moulded mixer according to claim 4, characterised in that: Two square rod (32) are fixedly connected with positioning block (38) on the bottom, two positioning grooves are formed in the top of the connecting plate (3), two positioning blocks (38) are embedded in the two positioning grooves respectively and are slidably connected with the two positioning grooves, two limiting blocks (39) are fixedly connected outside two box (34), two limiting rods (40) are slidably embedded in the limiting blocks (39) inside, and two limiting rods (40) are fixedly connected on the bottom of the connecting plate (3).

6. A sand-mold casting mixer according to claim 1, characterized in that: The bottom of the stirring box (2) is fixedly embedded with a discharge pipe (41), the outside of the discharge pipe (41) is provided with an opening and closing valve I (42), one side of the water tank (24) is fixedly embedded with a pipeline IV (43), and the outside of the pipeline IV (43) is provided with an opening and closing valve II (44).

7. A sand-mold casting mixer according to claim 1, characterized in that: The bottom plate (1) is fixedly connected with supporting legs at four corners.

8. A sand-mold casting mixer according to claim 1, characterized in that: The rotating shaft I (5) is connected with the connecting plate (10), the U-shaped frame (4) and the connecting plate (3) through bearings, and the rotating shaft II (9) is connected with the connecting plate (3) through a bearing.

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