Sand mixer for coated sand production

Abstract

The utility model relates to the technical field of film coated sand production equipment, disclose a kind of sand mixer for film coated sand production, including motor and tank body, tank body upper side is fixedly connected with tank cover, tank cover middle upper side is fixedly connected with auxiliary plate, rotation assembly is provided in the auxiliary plate, motor is provided in the tank cover rear side upper end, the auxiliary plate right side outer wall is fixedly connected with protection plate, the tank cover right side outer wall is fixedly connected with guide frame, the guide frame is internally provided with feeding assembly, the auxiliary plate is connected with thin transmission rod by fixed component, the thin transmission rod lower side outer wall is fixedly connected with connecting rod, the connecting rod outer wall is rotatably connected with roll wheel. In the utility model, double transmission rod same speed reverse rotation drives roll wheel, scraper and guide plate to work cooperatively, reduces mixing dead angle, improves mixing uniformity and efficiency;Simultaneously realize the intermittent addition of filling tank by using sprocket drive to add additive, ensure precision, utilization, make production more stable and efficient.

Description

Technical Field

[0001] This utility model relates to the technical field of coated sand production equipment, and in particular to a sand mixer for coated sand production. Background Technology

[0002] In the foundry industry, coated sand is widely used in the production of castings in the automotive, machinery, and aerospace industries due to its excellent collapsibility, fluidity, and surface finish. The sand mixer, as the core equipment in coated sand production, primarily functions to thoroughly mix quartz sand with additives such as thermosetting resins and hexamethylenetetramine to form a uniform coated sand mixture. Therefore, its performance directly affects the quality stability of the coated sand. Currently, existing sand mixers have certain limitations in use. Regarding material mixing, traditional equipment often uses a single-unit compaction structure. Because the movement trajectory of the compaction components is relatively fixed, material residue easily accumulates on the inner wall of the tank due to adhesion, and material in the edge areas of the tank is difficult to fully agitate, easily forming mixing dead zones and resulting in poor uniformity of sand mixing. Regarding additive addition, existing equipment mostly relies on manual control or simple mechanical structures for addition, making it difficult to achieve quantitative and regular intermittent addition. If too much additive is added at once, it can easily cause localized aggregation, increasing the difficulty of mixing; if the addition rhythm is inappropriate, it will affect the sufficiency of the reaction between the sand and the additive, thereby reducing production efficiency.

[0003] In response to this technical problem, this application proposes a sand mixer for producing coated sand. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a sand mixer for coated sand production. The mixer features dual drive rods that rotate in opposite directions at the same speed, driving the rolling roller, scraper, and guide plate to work together, reducing dead zones in the mixing process, and improving the uniformity and efficiency of mixing. At the same time, the invention utilizes sprocket transmission to enable intermittent addition of additives in the filling tank, ensuring accuracy and utilization rate, and making production more stable and efficient.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a sand mixer for producing coated sand, comprising a motor and a tank body. A tank cover is fixedly connected to the upper side of the tank body. An auxiliary plate is fixedly connected to the upper middle side of the tank cover. A rotating assembly is installed inside the auxiliary plate. A motor is installed at the upper rear end of the tank cover. A protective plate is fixedly connected to the outer right side of the auxiliary plate. A guide frame is fixedly connected to the outer right side of the tank cover. A feeding assembly is installed inside the guide frame. A thin transmission rod is connected to the auxiliary plate through a fixed assembly. A connecting rod is fixedly connected to the lower outer side of the thin transmission rod. A rolling wheel is rotatably connected to the outer wall of the connecting rod. A tank bottom plate is fixedly connected to the bottom end of the tank body. A rotating plate is slidably connected inside the bottom plate on the right side. A support is fixedly connected to the bottom end of the tank bottom plate.

[0006] Furthermore, the rotating assembly includes a connecting frame fixedly connected inside the auxiliary plate, a second bevel gear rotatably connected to the upper side of the connecting frame, a first bevel gear rotatably connected to the lower side of the connecting frame, a third bevel gear rotatably connected to the right side of the connecting frame, and the outer wall of the third bevel gear fixedly connected to the rotating end of the motor.

[0007] Furthermore, the feeding assembly includes a funnel fixedly connected to the upper outer wall of the guide frame, a filling tank slidably connected inside the guide frame, a flip cover rotatably connected to the bottom end of the filling tank, a reciprocating screw rotatably connected to the left side of the guide frame, and the outer wall of the filling tank sleeved on the outer wall of the reciprocating screw.

[0008] Furthermore, a thin transmission rod is fixedly connected to the lower side of the second bevel gear, and a thick transmission rod is fixedly connected to the lower end of the first bevel gear. The outer wall of the thin transmission rod is rotatably connected to the inside of the thick transmission rod.

[0009] Furthermore, a fixing rod is fixedly connected to the outer wall of the coarse transmission rod, and a scraper is fixedly connected to the right end of the fixing rod.

[0010] Furthermore, an auxiliary rod is fixedly connected to the outer wall of the right side of the fixed rod, and a guide plate is fixedly connected to the lower side of the auxiliary rod.

[0011] Furthermore, a first sprocket is fixedly connected to the rotating end of the motor, a chain is meshed with the outer wall of the first sprocket, a second sprocket is meshed with the inner wall of the right side of the chain, and the outer wall of the second sprocket is fixedly connected to the left end of the reciprocating lead screw.

[0012] Furthermore, a feeding port is provided on the right side of the can lid, and the outer wall of the feeding port is located on the left side of the guide frame.

[0013] This utility model has the following beneficial effects: In this invention, multiple operations are coordinated through the linkage of bevel gear sets. The motor drives the third bevel gear to rotate, synchronously driving the upper and lower bevel gear sets, which in turn drive the fine and coarse transmission rods respectively. The fine transmission rod drives the crushing wheel to crush the material, while the coarse transmission rod drives the scraper and guide plate. The scraper cleans the adhering material from the tank wall, and the guide plate guides the material from the edges to the center. More importantly, the two transmission rods rotate at the same speed but in opposite directions, which not only enhances the relative motion between materials but also eliminates the dead zones of traditional single-wheel mixing, resulting in more uniform sand mixing and significantly improving mixing efficiency.

[0014] In this invention, a motor drives a reciprocating screw via a sprocket transmission, causing the filling tank to move back and forth. When moving to the right, it receives additives from the funnel; when moving to the left, it quantitatively adds additives into the tank through the feeding port, achieving intermittent addition. This design avoids the mixing problems caused by excessive one-time addition, accelerates the blending speed, and the long plate structure of the filling tank effectively prevents material from falling out. This ensures addition accuracy and improves material utilization, making the entire production process more stable and efficient. Attached Figure Description

[0015] Figure 1 This is a perspective view of a sand mixer for producing coated sand according to the present invention. Figure 2 This is a schematic diagram of the guide plate structure of a sand mixer for producing coated sand according to the present invention; Figure 3 This is a schematic diagram of the sprocket structure of a sand mixer for producing coated sand according to the present invention; Figure 4 This is a schematic diagram of the reciprocating screw structure of a sand mixer for producing coated sand, as proposed in this utility model.

[0016] Legend: 1. Motor; 2. Funnel; 3. Auxiliary plate; 4. Tank lid; 5. Protective plate; 6. Tank body; 7. Support; 8. Fixing rod; 9. Scraper; 10. Guide plate; 11. Tank bottom plate; 12. Rolling wheel; 13. Rotating plate; 14. First sprocket; 15. Second sprocket; 16. Chain; 17. First bevel gear; 18. Coarse transmission rod; 19. Fine transmission rod; 20. Second bevel gear; 21. Third bevel gear; 22. Guide frame; 23. Feed port; 24. Filling tank; 25. Reciprocating screw. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Reference Figures 2-4This utility model provides an embodiment of a sand mixer for producing coated sand, comprising a motor 1 and a tank 6. A tank cover 4 is fixedly connected to the upper side of the tank 6. An auxiliary plate 3 is fixedly connected to the upper middle side of the tank cover 4. A connecting frame is provided inside the auxiliary plate 3. A second bevel gear 20 is rotatably connected to the upper side of the connecting frame. A first bevel gear 17 is rotatably connected to the lower side of the connecting frame. A third bevel gear 21 is rotatably connected to the right side of the connecting frame. The outer wall of the third bevel gear 21 is fixedly connected to the rotating end of the motor 1. The motor 1 is provided at the upper rear end of the tank cover 4. A protective plate 5 is fixedly connected to the outer right side of the auxiliary plate 3. A guide frame 22 is fixedly connected to the outer right side of the tank cover 4. A funnel 2 is provided inside the guide frame 22. A filling tank 24 is slidably connected inside the guide frame 22. A flip-top is rotatably connected to the bottom end of the filling tank 24. A reciprocating screw 25 is rotatably connected to the left side of the guide frame 22. The outer wall of the filling tank 24 is sleeved on the outer wall of the reciprocating screw 25. The auxiliary plate 3 is connected to a thin transmission rod 19 via a fixed assembly. A connecting rod is fixedly connected to the lower outer wall of the thin transmission rod 19. A rolling wheel 12 is rotatably connected to the outer wall of the connecting rod. A tank bottom plate 11 is fixedly connected to the bottom of the tank body 6. A rotating plate 13 is slidably connected inside the right side tank bottom plate 11. A support 7 is fixedly connected to the bottom of the tank bottom plate 11.

[0019] Specifically, traditional structures often use a single grinding wheel 12, which can easily create dead zones during mixing and cause sand to adhere to the inner wall of the tank 6. Additionally, thermosetting resins and hexamethylenetetramine are added during mixing to help coat the internal quartz sand; however, adding too much of these can make mixing difficult. First, the motor 1 drives the third bevel gear 21 to rotate, which in turn rotates the upper second bevel gear 20 and the lower first bevel gear 17. The second bevel gear 20 drives the fine transmission rod 19 to rotate, which in turn rotates the grinding wheel 12, thus crushing the quartz sand mixture. The first bevel gear 17 drives the coarse transmission rod 18 to rotate, which in turn rotates the fixing rod 8 on the lower outer wall, causing the outer scraper 9 to rotate and clean the adhering material from the inside of the tank 6. The lower guide plate 10 guides the sand from the outside to move inward during rotation, where it is squeezed and mixed by the inner grinding wheel 12. Furthermore, the fine transmission rod 19 rotates at the same speed but in the opposite direction to the coarse transmission rod 18, which reduces adhesion to the inner wall and avoids problems such as dead zones during mixing. The starting motor 1 also drives the first sprocket 14 to rotate, thereby driving the chain 16 and the second sprocket 15 to rotate, which in turn drives the reciprocating screw 25 to rotate inside the guide frame 22. This causes the filling tank 24 inside to move left and right. When the filling tank 24 moves to the right, it can receive the material inside the funnel 2. When it moves to the left, the lower flap rotates, and the material inside can enter the tank 6 through the feed port 23. This allows for the quantitative addition of additives. Intermittent addition can improve the mixing speed. The filling tank 24 has a long plate on the right side, which can prevent the material in the upper funnel 2 from falling when it slides to the left. The rotating plate 13 on the lower side is rotatably connected to the bottom plate 11 of the tank, and its opening and closing can be controlled to release the product inside.

[0020] Reference Figure 1 , Figure 3 and Figure 4 A thin transmission rod 19 is fixedly connected to the lower side of the second bevel gear 20, and a thick transmission rod 18 is fixedly connected to the lower end of the first bevel gear 17. The outer wall of the thin transmission rod 19 is rotatably connected to the inside of the thick transmission rod 18. A fixing rod 8 is fixedly connected to the outer wall of the thick transmission rod 18, and a scraper 9 is fixedly connected to the right end of the fixing rod 8. An auxiliary rod is fixedly connected to the outer wall of the right side of the fixing rod 8, and a guide plate 10 is fixedly connected to the lower side of the auxiliary rod. A first sprocket 14 is fixedly connected to the rotating end of the motor 1. A chain 16 is meshed with the outer wall of the first sprocket 14, and a second sprocket 15 is meshed with the inner wall of the right side of the chain 16. The outer wall of the second sprocket 15 is fixedly connected to the left end of the reciprocating screw 25. A feeding port 23 is opened on the right side of the can cover 4, and the outer wall of the feeding port 23 is located on the left side of the guide frame 22.

[0021] Specifically, a thin transmission rod 19 is fixedly connected to the lower side of the second bevel gear 20, and a coarse transmission rod 18 is fixedly connected to the lower end of the first bevel gear 17. The outer wall of the thin transmission rod 19 is rotatably connected inside the coarse transmission rod 18. This nested rotatable connection structure provides a basis for the thin transmission rod 19 and the coarse transmission rod 18 to rotate in opposite directions at the same speed, which can enhance the overall mixing. A fixing rod 8 is fixedly connected to the outer wall of the coarse transmission rod 18, and a scraper 9 is fixedly connected to the right end of the fixing rod 8. When the scraper 9 rotates with the coarse transmission rod 18, it can scrape off the sand adhering to the inner wall of the tank 6 to avoid material residue. An auxiliary rod is fixedly connected to the outer wall of the right side of the fixing rod 8, and a guide plate 10 is fixedly connected to the lower side of the auxiliary rod. During the rotation, the guide plate 10 can guide the sand on the outside of the tank 6 to move inward, ensuring that the sand can be fully squeezed and mixed by the inner grinding wheel 12. A first sprocket 14 is fixedly connected to the rotating end of motor 1. A chain 16 is meshed with the outer wall of the first sprocket 14. A second sprocket 15 is meshed with the inner wall of the right side of the chain 16. The outer wall of the second sprocket 15 is fixedly connected to the left end of the reciprocating screw 25, forming a sprocket transmission mechanism that can transmit the power of motor 1 to the reciprocating screw 25 to drive it to rotate. A feeding port 23 is provided on the right side of the can cover 4. The outer wall of the feeding port 23 is located on the left side of the guide frame 22, serving as a channel for additives to enter the can 6. When the filling can 24 moves to the left side, the additives inside it can be accurately fed into the can 6 through the feeding port 23.

[0022] Working principle: After starting the motor 1, its rotating end drives the third bevel gear 21 to rotate. Since the third bevel gear 21 meshes with the second bevel gear 20 and the first bevel gear 17 on the connecting frame, it drives the second bevel gear 20 and the first bevel gear 17 to rotate synchronously. Among them, the second bevel gear 20 drives the thin transmission rod 19 fixedly connected to the lower side to rotate. The thin transmission rod 19 drives the crushing wheel 12 to rotate through the connecting rod, realizing the crushing and stirring of the quartz sand mixture in the tank 6. The first bevel gear 17 drives the coarse transmission rod 18 fixedly connected to the lower end to rotate, so that the fixed rod 8 on the outer wall of the coarse transmission rod 18 rotates accordingly. The scraper 9 at the right end of the fixed rod 8 rotates synchronously, which can scrape off the sand material attached to the inner wall of the tank 6 to avoid material residue. At the same time, when the fixed rod 8 is connected to the guide plate 10 through the auxiliary rod, it can guide the sand material on the outside of the tank 6 to move inward, ensuring that the sand material is fully squeezed and stirred by the crushing wheel 12 on the inner side. It is worth noting that the fine transmission rod 19 and the coarse transmission rod 18 rotate at the same speed but in opposite directions, effectively reducing the dead zone of mixing and the problem of adhesion to the inner wall. At the same time, the rotating end of the motor 1 also drives the first sprocket 14 to rotate, and the first sprocket 14 drives the second sprocket 15 to rotate through the chain 16, which in turn drives the reciprocating screw 25 to rotate in the guide frame 22, causing the filling tank 24, which is slidably connected inside the guide frame 22, to move left and right: when the filling tank 24 moves to the right, it can receive the additive in the funnel 2; when it moves to the left, the flip-top at its bottom rotates, and the additive inside enters the tank body 6 through the feed port 23 on the right side of the tank cover 4, realizing the quantitative and intermittent addition of the additive, which not only improves the mixing speed, but also prevents the material in the funnel 2 from falling out during the movement due to the long plate structure on the right side of the filling tank 24. Finally, the coated sand, which has been fully crushed, stirred and uniformly added with additives, can be discharged through the rotating plate 13 slidably connected on the tank bottom plate 11. The whole process is completed under the stable support of the support 7.

[0023] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A sand mixer for producing coated sand, comprising a motor (1) and a tank (6), characterized in that: A can lid (4) is fixedly connected to the upper side of the tank body (6). An auxiliary plate (3) is fixedly connected to the upper middle side of the can lid (4). A rotating component is provided inside the auxiliary plate (3). A motor (1) is provided at the upper rear side of the can lid (4). A protective plate (5) is fixedly connected to the outer right side of the auxiliary plate (3). A guide frame (22) is fixedly connected to the outer right side of the can lid (4). A feeding component is provided inside the guide frame (22). A thin transmission rod (19) is connected to the auxiliary plate (3) through a fixed component. A connecting rod is fixedly connected to the lower outer side of the thin transmission rod (19). A rolling wheel (12) is rotatably connected to the outer wall of the connecting rod. A tank bottom plate (11) is fixedly connected to the bottom end of the tank body (6). A rotating plate (13) is slidably connected inside the tank bottom plate (11) on the right side. A support (7) is fixedly connected to the bottom end of the tank bottom plate (11).

2. The sand mixer for producing coated sand according to claim 1, characterized in that: The rotating assembly includes a connecting frame fixedly connected inside the auxiliary plate (3). A second bevel gear (20) is rotatably connected to the upper side of the connecting frame, a first bevel gear (17) is rotatably connected to the lower side of the connecting frame, and a third bevel gear (21) is rotatably connected to the right side of the connecting frame. The outer wall of the third bevel gear (21) is fixedly connected to the rotating end of the motor (1).

3. The sand mixer for producing coated sand according to claim 1, characterized in that: The feeding assembly includes a funnel (2) fixedly connected to the upper outer wall of the guide frame (22), a filling tank (24) slidably connected inside the guide frame (22), a flip cover rotatably connected to the bottom end of the filling tank (24), a reciprocating screw (25) rotatably connected to the left side of the guide frame (22), and the outer wall of the filling tank (24) is sleeved on the outer wall of the reciprocating screw (25).

4. A sand mixer for producing coated sand according to claim 2, characterized in that: A thin transmission rod (19) is fixedly connected to the lower side of the second bevel gear (20), and a thick transmission rod (18) is fixedly connected to the lower end of the first bevel gear (17). The outer wall of the thin transmission rod (19) is rotatably connected to the inside of the thick transmission rod (18).

5. A sand mixer for producing coated sand according to claim 4, characterized in that: The outer wall of the coarse transmission rod (18) is fixedly connected to a fixing rod (8), and a scraper (9) is fixedly connected to the right end of the fixing rod (8).

6. A sand mixer for producing coated sand according to claim 5, characterized in that: An auxiliary rod is fixedly connected to the outer right side of the fixed rod (8), and a guide plate (10) is fixedly connected to the lower side of the auxiliary rod.

7. A sand mixer for producing coated sand according to claim 3, characterized in that: The rotating end of the motor (1) is fixedly connected to a first sprocket (14), and a chain (16) is meshed with the outer wall of the first sprocket (14). A second sprocket (15) is meshed with the inner wall of the right side of the chain (16), and the outer wall of the second sprocket (15) is fixedly connected to the left end of the reciprocating screw (25).

8. A sand mixer for producing coated sand according to claim 1, characterized in that: The can lid (4) has a feeding port (23) on the right side, and the outer wall of the feeding port (23) is located on the left side of the guide frame (22).

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