Casting sand mixing stirrer

Abstract

The utility model belongs to the technical field of sand mixers, and particularly relates to a casting sand mixing stirrer which comprises a stirring barrel, a sand mixing device, a sand mixing device, a sand mixing device and a sand mixing device, the stirring barrel comprises an upper barrel body and a lower barrel body, and a feeding hopper is arranged on one side of the upper barrel body; the filtering mechanism is arranged between the upper barrel body and the lower barrel body and is used for filtering the materials; the stirring mechanism is arranged in the stirring cylinder and used for stirring materials in the upper cylinder body and the lower cylinder body, and the stirring directions of the materials in the upper cylinder body and the lower cylinder body are opposite; and a mixing agent quantifying cylinder is arranged on the other side of the upper cylinder body. The stirring mechanism has the beneficial effects that the material stirring directions of the stirring mechanism in the upper barrel body and the lower barrel body are opposite, and the reverse stirring design further enhances the stirring effect, so that the materials can reach a uniform state more quickly.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of sand mixers, in particular to a foundry sand mixing and stirring machine. BACKGROUND

[0002] The foundry sand mixing and stirring machine, commonly known as a sand mixer, is a main equipment for mixing and preparing foundry sand. It can uniformly mix raw sand, binders and other additives to produce high-quality sand molds that meet the needs of casting production. The working principle of the sand mixer is mainly achieved through mixing and stirring. During the mixing process, the stirring blades or paddles inside the sand mixer rotate at high speed, generating strong shearing force and impact force, which allows various materials to fully contact and mix uniformly. Specifically, the stirrer generally adopts a spiral shape or rotating blades, which are driven by a motor and transmission system to rotate at a certain speed and direction, thereby achieving the mixing and stirring of materials.

[0003] Patent No. CN220968897U discloses a sanding agent mixing and stirring machine, which includes a feed hopper, an upper stirring tank, a filter pipe, a lower stirring tank and a mixing agent dosing cylinder. The upper stirring tank is connected to the lower stirring tank through the filter pipe. The inside of the upper stirring tank is provided with an upper stirring rod, and the inside of the lower stirring tank is provided with a lower stirring rod. The upper stirring tank is provided with a guide chute and a mixing agent dosing cylinder on the two sides and upper corners, respectively. The top of the guide chute is provided with a feed hopper.

[0004] The above-mentioned patent sets up an upper stirring tank and a lower stirring tank, and respectively sets up an upper stirring rod and a lower stirring rod in the upper stirring tank and the lower stirring tank, so as to carry out secondary mixing and stirring treatment on the sanding agent. Although the treatment effect can be improved, the two stirring rods are connected through a shaft coupling, and the stirring directions are the same, which leads to a single stirring effect and needs to be improved. SUMMARY

[0005] The purpose of the present application is to provide a foundry sand mixing and stirring machine that can solve the above problems.

[0006] The purpose of the present application is to provide a foundry sand mixing and stirring machine, which comprises:

[0007] The stirring cylinder comprises an upper cylinder body and a lower cylinder body. The side of the upper cylinder body is provided with a feed hopper.

[0008] The filter mechanism is arranged between the upper cylinder body and the lower cylinder body, and is used for filtering the materials.

[0009] The stirring mechanism is arranged in the stirring cylinder, and is used for stirring the materials in the upper cylinder body and the lower cylinder body. The stirring directions of the materials in the upper cylinder body and the lower cylinder body are opposite.

[0010] The other side of the upper cylinder body is provided with a mixing agent dosing cylinder.

[0011] The casting sand mixing and stirring machine has the advantages that the upper cylinder and the lower cylinder are arranged, and the stirring mechanisms are arranged in the two cylinders respectively, so that the secondary stirring treatment of the materials is realized, the split stirring design increases the stirring levels, and the materials can be mixed more fully. The stirring directions of the stirring mechanisms in the upper cylinder and the lower cylinder are opposite, the reverse stirring design further enhances the stirring effect, and the materials can reach the uniform state more quickly. The filter mechanism arranged between the upper cylinder and the lower cylinder effectively filters the materials, removes the impurities and particles in the materials, improves the purity and quality of the materials, and effectively controls the fine particles generated in the stirring process, so that the problem of affecting the sand mixing effect due to the too large or too small particles is avoided.

[0012] The mixing agent quantitative cylinder arranged on the other side of the upper cylinder realizes the accurate metering and quantitative addition of the mixing agent, improves the utilization rate of the mixing agent, ensures the accuracy of the sand mixing ratio, and guarantees the quality of the casting. Due to the synergistic effect of the stirring mechanism, the filter mechanism and the quantitative cylinder, the materials in the sand mixing process can be mixed, filtered and quantitatively added more fully, so that the uniformity and quality of the sand mixing are improved, a good foundation is provided for the subsequent casting process, and the quality and production efficiency of the casting are ensured.

[0013] Further, the stirring mechanism comprises:

[0014] The mounting ring is arranged in the filter mechanism, and the center of the mounting ring is provided with a mounting seat through the connecting rod;

[0015] The first stirring rod is arranged in the upper cylinder;

[0016] The second stirring rod is arranged in the lower cylinder;

[0017] The driver is arranged at the top of the upper cylinder and is connected with the second stirring rod;

[0018] The cooperation assembly is arranged in the mounting seat and is used for connecting the first stirring rod and the second stirring rod.

[0019] The mounting ring is arranged in the filtering mechanism, and the center thereof is connected with the mounting base through the connecting rod, which not only ensures the stable installation of the stirring mechanism in the stirring barrel, but also provides necessary structural support for the reverse stirring of the first stirring rod and the second stirring rod. The mounting base is provided with a matching assembly for connecting the first stirring rod and the second stirring rod, so that the two stirring rods can realize synchronous but reverse stirring actions under the driving of the driver. The first stirring rod is arranged in the upper barrel body, and the second stirring rod is arranged in the lower barrel body. When the driver is started, it drives the two stirring rods to stir simultaneously through the matching assembly. Due to the arrangement of the matching assembly, the stirring directions of the first stirring rod and the second stirring rod are opposite, so that the materials can be more fully mixed and dispersed.

[0020] The driver is arranged at the top of the upper barrel body and is directly connected with the second stirring rod, which not only simplifies the transmission mechanism, reduces the complexity and manufacturing cost of the equipment, but also enables the driver to more effectively drive the second stirring rod to stir. At the same time, since the driver is located at the top of the upper barrel body, the maintenance and repair of the equipment are more convenient.

[0021] Further, the matching assembly comprises:

[0022] The mounting cavity is arranged in the mounting base;

[0023] The hollow slot is arranged in the first stirring rod and penetrates through the first stirring rod, and the second stirring rod penetrates from the upper barrel body to the lower barrel body through the hollow slot;

[0024] The rotating seat is arranged in the mounting cavity, the top of the rotating seat is connected with the first stirring rod, and the center of the rotating seat is provided with a through hole for the second stirring rod to pass through;

[0025] The connecting assembly is arranged on the second stirring rod;

[0026] The second stirring rod is connected with the rotating seat through the connecting assembly, and the first stirring rod is driven to rotate through the connecting assembly and the rotating seat.

[0027] The mounting cavity is arranged in the mounting base to provide mounting space for the rotating seat. The top of the rotating seat is connected with the first stirring rod, which ensures that the first stirring rod can be stably installed in the stirring barrel and can receive power from the driver through the rotating seat. The center of the rotating seat is provided with a through hole for the second stirring rod to pass through, so that the second stirring rod can smoothly pass through the first stirring rod and extend into the lower barrel body. The hollow slot is arranged in the first stirring rod and penetrates through the entire first stirring rod, which not only provides a passage for the second stirring rod to pass through the first stirring rod, but also ensures that the second stirring rod can freely perform stirring actions in the lower barrel body. At the same time, the existence of the hollow slot also reduces the weight of the first stirring rod, so that the stirring mechanism as a whole is more light and flexible.

[0028] The connecting assembly is arranged on the second stirring rod and connected with the rotating seat, so that the second stirring rod and the rotating seat rotate synchronously, thereby ensuring that the first stirring rod and the second stirring rod can simultaneously perform stirring actions. When the driver is started, power is transmitted to the rotating seat through the second stirring rod and the connecting assembly, thereby driving the first stirring rod to perform stirring actions. The matching assembly enables the first stirring rod and the second stirring rod to perform synchronous but reverse stirring actions, thereby improving the stability and durability of the stirring mechanism and significantly improving the uniformity and efficiency of sand mixing.

[0029] Further, the connecting assembly comprises:

[0030] The main gear is arranged outside the second stirring rod and located in the mounting cavity.

[0031] The gear ring is arranged in the rotating seat.

[0032] The auxiliary gear is arranged in the mounting cavity and located between the main gear and the gear ring.

[0033] The auxiliary gear is meshed with the gear ring and the main gear.

[0034] The main gear is arranged outside the second stirring rod and located in the mounting cavity, for transmitting power from the driver to the auxiliary gear. The auxiliary gear is arranged in the mounting cavity and located between the main gear and the gear ring, and through meshing with the main gear and the gear ring, power transmission and direction conversion are achieved. The gear ring is arranged in the rotating seat and meshed with the auxiliary gear. When the auxiliary gear rotates, it drives the gear ring to rotate synchronously, thereby driving the rotating seat and the first stirring rod to perform stirring actions. When the driver is started, the second stirring rod rotates and transmits power to the main gear on the second stirring rod. When the main gear rotates, it meshes with the auxiliary gear and drives it to rotate. Since the auxiliary gear is simultaneously meshed with the gear ring, when the auxiliary gear rotates, it drives the gear ring to rotate in the opposite direction. The rotation of the gear ring drives the rotating seat and the first stirring rod connected thereto to perform stirring actions. And due to the meshing relationship between the gear ring and the auxiliary gear, the rotation direction of the first stirring rod is opposite to that of the second stirring rod.

[0035] Through the above design, the connecting assembly enables the second stirring rod and the first stirring rod to perform synchronous but reverse stirring actions, which can promote the shearing and collision between materials, help the dispersion and mixing of materials, and thereby improve the quality of sand mixing.

[0036] Further, the auxiliary gear is arranged in the mounting cavity through the rotating shaft, and the number of auxiliary gears is at least three.

[0037] The adoption of at least three pinions can disperse the torque and load borne by a single pinion, thereby enhancing the stability and durability of the stirring mechanism. The meshing of multiple pinions can also reduce the wear and noise between the pinions and improve the overall performance of the stirring mechanism. The increase in the number of pinions makes the power transmission during stirring more stable and uniform, thereby improving the uniformity and efficiency of stirring.

[0038] Further, the filtering mechanism comprises:

[0039] A sleeve is arranged between the upper cylinder and the lower cylinder, and the inner wall of the sleeve is connected with the mounting ring.

[0040] A filter screen is arranged on the connecting rod.

[0041] The center of the filter screen is provided with a positioning ring for mounting the mounting seat, and the mounting seat is located on the positioning ring.

[0042] The sleeve is arranged between the upper cylinder and the lower cylinder, and the inner wall of the sleeve is connected with the mounting ring, thereby ensuring the stable installation of the filtering mechanism in the stirring cylinder and providing necessary support for the arrangement of the filter screen. The filter screen is arranged on the connecting rod, the connecting rod is connected with the mounting ring, and the filter screen and the connecting rod are detachably connected, thereby facilitating the replacement of the filter screen. The center of the filter screen is provided with a positioning ring, the positioning ring provides a mounting position for the mounting seat, and the mounting seat is located on the positioning ring and connected with the positioning ring.

[0043] The application has the following beneficial effects:

[0044] 1. The stirring direction of the stirring mechanism in the upper cylinder and the lower cylinder is opposite, and the reverse stirring design further enhances the stirring effect, so that the material can reach a uniform state more quickly.

[0045] 2. The filtering mechanism arranged between the upper cylinder and the lower cylinder effectively filters the material, removes impurities and particles in the material, improves the purity and quality of the material, and effectively controls the fine particles generated during stirring, thereby avoiding the problem of affecting the sand mixing effect due to too large or too small particles.

[0046] 3. The connecting assembly realizes the synchronous but reverse stirring action of the second stirring rod and the first stirring rod, can promote the shearing and collision between the materials, is helpful for the dispersion and mixing of the materials, and thereby improves the quality of sand mixing. BRIEF DESCRIPTION OF DRAWINGS

[0047] Figure 1 is a structural schematic view of the utility model;

[0048] Figure 2 is a structural schematic view of the stirring mechanism of the utility model;

[0049] Figure 3 is a sectional view of the stirring mechanism of the utility model;

[0050] Figure 4 is a sectional view of the cooperation assembly of the utility model.

[0051] In the drawing, reference signs are: 100, stirring drum; 110, upper drum body; 120, lower drum body; 130, feeding hopper; 140, mixing agent dosing cylinder; 200, filtering mechanism; 210, sleeve; 220, filter screen; 230, positioning ring; 300, stirring mechanism; 310, mounting ring; 320, mounting seat; 330, first stirring rod; 340, second stirring rod; 350, driver; 400, cooperation assembly; 410, mounting cavity; 420, hollow groove; 430, rotating seat; 431, through hole; 450, connecting assembly; 451, main gear; 452, gear ring; 453, auxiliary gear. DETAILED DESCRIPTION

[0052] The technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art belong to the scope of protection of the present application.

[0053] The terms "first", "second", and the like in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are usually a class, and are not limited to the number of objects, for example, the first object can be one or more. In addition, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / ", generally indicates that the front and rear associated objects are in a "or" relationship.

[0054] The foundry sand mixing and stirring machine provided by the embodiments of the present application will be described in detail below in combination with the drawings and specific embodiments and application scenarios.

[0055] Embodiment 1:

[0056] As Figure 1 shown, the present application provides a foundry sand mixing and stirring machine, which can solve the above problems.

[0057] The purpose of the present application is to provide a foundry sand mixing and stirring machine, comprising:

[0058] The stirring barrel 100 comprises an upper barrel body 110, a lower barrel body 120, and a feeding hopper 130 arranged on one side of the upper barrel body 110.

[0059] The filtering mechanism 200 is arranged between the upper barrel body 110 and the lower barrel body 120, and is used for filtering the material.

[0060] The stirring mechanism 300 is arranged in the stirring barrel 100, and is used for stirring the material in the upper barrel body 110 and the lower barrel body 120, and the stirring directions of the material in the upper barrel body 110 and the lower barrel body 120 are opposite.

[0061] The other side of the upper barrel body 110 is provided with a mixing agent metering cylinder 140.

[0062] In some embodiments of the present application, as shown in Figure 1 The above-described cast sand mixing and stirring machine is used, the upper barrel body 110 and the lower barrel body 120 are arranged, and the stirring mechanism 300 is arranged in the two barrel bodies, so that the secondary stirring treatment of the material is realized, the split stirring design increases the stirring level, and the material can be more fully mixed. The stirring directions of the material in the upper barrel body 110 and the lower barrel body 120 by the stirring mechanism 300 are opposite, the reverse stirring design further enhances the stirring effect, and the material can reach a uniform state more quickly. The filtering mechanism 200 arranged between the upper barrel body 110 and the lower barrel body 120 effectively filters the material, removes impurities and particles in the material, improves the purity and quality of the material, and the existence of the filtering mechanism 200 also effectively controls the fine particles generated in the stirring process, avoiding the problem that the mixing sand effect is affected by the too large or too small particles.

[0063] The mixing agent metering cylinder 140 arranged on the other side of the upper barrel body 110 realizes accurate metering and quantitative addition of the mixing agent, improves the utilization rate of the mixing agent, ensures the accuracy of the sand mixing ratio, and guarantees the quality of the castings. Due to the synergistic effect of the stirring mechanism 300, the filtering mechanism 200 and the metering cylinder, the material in the sand mixing process can be more fully mixed, filtered and quantitatively added, thereby improving the uniformity and quality of the sand mixing, providing a good foundation for the subsequent casting process, and ensuring the quality and production efficiency of the castings.

[0064] Embodiment 2:

[0065] The cast sand mixing and stirring machine provided in the embodiments of the present application comprises the following technical features in addition to the above technical features.

[0066] As shown in Figures 1 to 3 The stirring mechanism 300 comprises:

[0067] The mounting ring 310 is arranged in the filtering mechanism 200, and the center of the mounting ring 310 is provided with the mounting seat 320 through a connecting rod;

[0068] The first stirring rod 330 is arranged in the upper cylinder body 110;

[0069] The second stirring rod 340 is arranged in the lower cylinder body 120;

[0070] The driver 350 is arranged at the top of the upper cylinder body 110 and connected with the second stirring rod 340;

[0071] The matching assembly 400 is further included, and the matching assembly 400 is arranged in the mounting seat 320 and used for connecting the first stirring rod 330 and the second stirring rod 340.

[0072] In the embodiment of the application, the mounting ring 310 is arranged in the filtering mechanism 200, and the center of the mounting ring 310 is provided with the mounting seat 320 through a connecting rod, which not only ensures the stable installation of the stirring mechanism 300 in the stirring barrel 100, but also provides necessary structural support for the reverse stirring of the first stirring rod 330 and the second stirring rod 340. The matching assembly 400 is arranged in the mounting seat 320 and used for connecting the first stirring rod 330 and the second stirring rod 340, so that the two stirring rods can realize synchronous but reverse stirring actions under the driving of the driver 350. The first stirring rod 330 is arranged in the upper cylinder body 110, and the second stirring rod 340 is arranged in the lower cylinder body 120. When the driver 350 is started, it drives the two stirring rods to stir at the same time through the matching assembly 400. Due to the arrangement of the matching assembly 400, the stirring directions of the first stirring rod 330 and the second stirring rod 340 are opposite, so that the materials can be more fully mixed and dispersed.

[0073] The driver 350 is arranged at the top of the upper cylinder body 110 and directly connected with the second stirring rod 340, which not only simplifies the transmission mechanism and reduces the complexity and manufacturing cost of the equipment, but also enables the driver 350 to more effectively drive the second stirring rod 340 to stir. At the same time, since the driver 350 is located at the top of the upper cylinder body 110, the maintenance and repair of the equipment are more convenient.

[0074] Embodiment 3:

[0075] The casting sand mixing and stirring machine provided in the embodiment of the application further includes the following technical features in addition to the above technical features.

[0076] As shown in Figure 2 to Figure 4 The matching assembly 400 includes:

[0077] The mounting cavity 410 is arranged in the mounting seat 320;

[0078] The hollow slot 420 is arranged in the first stirring rod 330 and penetrates the first stirring rod 330, and the second stirring rod 340 penetrates the upper barrel 110 to the lower barrel 120 through the hollow slot 420;

[0079] The rotating seat 430 is arranged in the mounting cavity 410, the top of the rotating seat 430 is connected with the first stirring rod 330, and a through hole 431 penetrating the center of the rotating seat 430 is arranged.

[0080] The connecting assembly 450 is arranged on the second stirring rod 340.

[0081] The second stirring rod 340 is connected with the rotating seat 430 through the connecting assembly 450, and the first stirring rod 330 is driven to rotate through the connecting assembly 450 and the rotating seat 430.

[0082] In the embodiment of the present application, the mounting cavity 410 is arranged in the mounting seat 320 to provide a mounting space for the rotating seat 430. The top of the rotating seat 430 is connected with the first stirring rod 330, so that the first stirring rod 330 can be stably mounted in the stirring barrel 100 and can receive power from the driver 350 through the rotating seat 430. The through hole 431 penetrating the center of the rotating seat 430 is arranged, so that the second stirring rod 340 can smoothly penetrate the first stirring rod 330 and extend into the lower barrel 120. The hollow slot 420 is arranged in the first stirring rod 330 and penetrates the entire first stirring rod 330, which not only provides a channel for the second stirring rod 340 to penetrate the first stirring rod 330, but also ensures that the second stirring rod 340 can freely perform stirring action in the lower barrel 120. At the same time, the existence of the hollow slot 420 also reduces the weight of the first stirring rod 330, so that the whole stirring mechanism 300 is more portable and flexible.

[0083] The connecting assembly 450 is arranged on the second stirring rod 340 and connected with the rotating seat 430, so that the second stirring rod 340 and the rotating seat 430 can synchronously rotate, thereby ensuring that the first stirring rod 330 and the second stirring rod 340 can simultaneously perform stirring action. When the driver 350 is started, power is transmitted to the rotating seat 430 through the second stirring rod 340 and the connecting assembly 450, so that the first stirring rod 330 is driven to perform stirring action. The cooperating assembly 400 realizes the synchronous but reverse stirring action of the first stirring rod 330 and the second stirring rod 340, which not only improves the stability and durability of the stirring mechanism 300, but also significantly improves the uniformity and efficiency of sand mixing.

[0084] Embodiment 4:

[0085] The casting sand mixing machine provided in the embodiment of the present application not only includes the above technical features, but also includes the following technical features.

[0086] As Figures 2 to 4 shown, the connecting assembly 450 comprises:

[0087] a main gear 451, disposed outside the second stirring rod 340 and in the mounting cavity 410;

[0088] a gear ring 452, disposed in the rotating seat 430;

[0089] a secondary gear 453, disposed in the mounting cavity 410 and between the main gear 451 and the gear ring 452;

[0090] wherein the secondary gear 453 is engaged with the gear ring 452 and the main gear 451.

[0091] In the embodiments of the present application, the main gear 451 is disposed outside the second stirring rod 340 and in the mounting cavity 410, for transmitting power from the driver 350 to the secondary gear 453. The secondary gear 453 is disposed in the mounting cavity 410 and between the main gear 451 and the gear ring 452, and through the engagement with the main gear 451 and the gear ring 452, the transmission of power and the conversion of direction are realized. The gear ring 452 is disposed in the rotating seat 430 and engaged with the secondary gear 453. When the secondary gear 453 rotates, it will drive the gear ring 452 to rotate synchronously, thereby driving the rotating seat 430 and the first stirring rod 330 to perform stirring action. When the driver 350 is started, it will drive the second stirring rod 340 to rotate and transmit power to the main gear 451 on the second stirring rod 340. When the main gear 451 rotates, it will engage with the secondary gear 453 and drive it to rotate. Since the secondary gear 453 is engaged with the gear ring 452 at the same time, when the secondary gear 453 rotates, it will drive the gear ring 452 to rotate in the opposite direction. The rotation of the gear ring 452 will drive the rotating seat 430 and the first stirring rod 330 connected thereto to perform stirring action. And due to the engagement relationship between the gear ring 452 and the secondary gear 453, the rotation direction of the first stirring rod 330 is opposite to that of the second stirring rod 340.

[0092] Through the above design, the connecting assembly 450 realizes the synchronous but reverse stirring action of the second stirring rod 340 and the first stirring rod 330, which can promote the shearing and collision between materials, help the dispersion and mixing of materials, and thus improve the quality of sand mixing.

[0093] Further, the secondary gear 453 is disposed in the mounting cavity 410 through a rotating shaft, and the number of the secondary gear 453 is at least three.

[0094] In some embodiments of the present application, the adoption of at least three pinions 453 can disperse the torque and load borne by a single gear, thereby enhancing the stability and durability of the stirring mechanism 300. Moreover, the meshing of multiple pinions 453 can also reduce the wear and noise between gears, improving the overall performance of the stirring mechanism 300. The increase in the number of pinions 453 makes the power transmission during stirring more stable and uniform, improving the uniformity and efficiency of stirring.

[0095] Embodiment 5:

[0096] The casting sand mixing and stirring machine provided in the embodiments of the present application, in addition to comprising the technical features described above, further comprises the following technical features.

[0097] As shown in Figure 1 the filtering mechanism 200 comprises:

[0098] a sleeve 210 arranged between the upper cylinder body 110 and the lower cylinder body 120, the inner wall of the sleeve 210 being connected with the mounting ring 310;

[0099] a filter screen 220 arranged on the connecting rod;

[0100] The center of the filter screen 220 is provided with a positioning ring 230 for mounting the mounting seat 320, and the mounting seat 320 is located on the positioning ring 230.

[0101] In the embodiments of the present application, the sleeve 210 is arranged between the upper cylinder body 110 and the lower cylinder body 120, and the inner wall of the sleeve 210 is connected with the mounting ring 310, which ensures the stable installation of the filtering mechanism 200 in the stirring cylinder 100 and provides necessary support for the arrangement of the filter screen 220. The filter screen 220 is arranged on the connecting rod, and the connecting rod is connected with the mounting ring 310. Moreover, the filter screen 220 is detachably connected with the connecting rod, which facilitates the replacement of the filter screen 220. The center of the filter screen 220 is provided with the positioning ring 230, which provides a mounting position for the mounting seat 320, and the mounting seat 320 is located on the positioning ring 230 and connected with the positioning ring 230.

[0102] It should be noted that, in the present document, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the presence of additional identical elements in the process, method, article, or apparatus that comprises the element. Furthermore, it is to be understood that the method and apparatus of the present application can be carried out by someone other than the person named in the independent claims, and that the scope of the independent claims is not limited to the person named in the independent claims. In addition, it should be noted that the scope of the method and apparatus of the present application is not limited to performing the functions in the order shown or discussed, but can also include performing the functions in a substantially simultaneous manner or in a reverse order, for example, the described method can be performed in an order different from that described, and various steps can be added, omitted, or combined. In addition, features described with reference to certain examples can be combined in other examples.

[0103] The embodiments of the present application are described above with reference to the accompanying drawings, but the present application is not limited to the specific embodiments described above, which are merely illustrative and not restrictive, and a person of ordinary skill in the art can make many forms under the inspiration of the present application without departing from the purpose of the present application and the scope protected by the claims.

Claims

1. A foundry sand mixer for casting, characterized by: The application relates to a mixing and filtering device. The device comprises a mixing barrel (100) comprising an upper barrel body (110) and a lower barrel body (120), wherein one side of the upper barrel body (110) is provided with a feeding hopper (130); a filtering mechanism (200) arranged between the upper barrel body (110) and the lower barrel body (120) and used for filtering materials; a mixing mechanism (300) arranged in the mixing barrel (100) and used for mixing materials in the upper barrel body (110) and the lower barrel body (120) in opposite directions; wherein the other side of the upper barrel body (110) is provided with a mixing agent metering barrel (140).

2. A foundry sand mixer according to claim 1, characterised in that: The mixing mechanism (300) comprises: a mounting ring (310) arranged in the filtering mechanism (200) and provided with a mounting seat (320) in the center through a connecting rod; a first mixing rod (330) arranged in the upper barrel body (110); a second mixing rod (340) arranged in the lower barrel body (120); a driver (350) arranged at the top of the upper barrel body (110) and connected with the second mixing rod (340); wherein a matching assembly (400) is further arranged in the mounting seat (320) and used for connecting the first mixing rod (330) and the second mixing rod (340).

3. A foundry sand mixer according to claim 2, wherein: The matching assembly (400) comprises: a mounting cavity (410) arranged in the mounting seat (320); a hollow groove (420) arranged in the first mixing rod (330) and penetrating through the first mixing rod (330), and the second mixing rod (340) penetrating from the upper barrel body (110) to the lower barrel body (120) through the hollow groove (420); a rotating seat (430) arranged in the mounting cavity (410) and connected with the first mixing rod (330) at the top, and provided with a through hole (431) in the center for the second mixing rod (340) to pass through; a connecting assembly (450) arranged on the second mixing rod (340); wherein the second mixing rod (340) is connected with the rotating seat (430) through the connecting assembly (450) and drives the first mixing rod (330) to rotate through the connecting assembly (450) and the rotating seat (430).

4. A foundry sand mixer according to claim 3, wherein: The connecting assembly (450) comprises: a main gear (451) arranged outside the second mixing rod (340) and in the mounting cavity (410); a gear ring (452) arranged in the rotating seat (430); a secondary gear (453) arranged in the mounting cavity (410) and located between the main gear (451) and the gear ring (452); wherein the secondary gear (453) is engaged with the gear ring (452) and the main gear (451).

5. A foundry sand mixer according to claim 4, wherein: The secondary gear (453) is arranged in the mounting cavity (410) through a rotating shaft, and the number of the secondary gears (453) is at least three.

6. A foundry sand mixer according to claim 5, wherein: The filtering mechanism (200) comprises: a sleeve (210) arranged between the upper barrel body (110) and the lower barrel body (120) and connected with the mounting ring (310) on the inner wall; a filtering screen (220) arranged on the connecting rod; The filter screen (220) is provided with a positioning ring (230) in the center for mounting a mounting seat (320), and the mounting seat (320) is located on the positioning ring (230).

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