Sand mixer

Abstract

A sand mixer comprises a sand mixer body, a stirring shaft, a stirring plate, a discharge port, supporting legs and a supporting seat. The stirring shaft is arranged at the bottom of the sand mixer body and circumferentially extends to form a plurality of stirring plates for stirring materials. The discharge port is located on one side of the bottom of the machine body and allows stirred materials to flow out. The supporting legs are arranged on the supporting base and divided into a fixed set and a telescopic set which are located on the two sides of the discharging opening respectively. After stirring is completed, the telescopic set supporting legs drive the machine body to incline, so that the inner bottom inclines downwards from the side away from the discharging opening, and materials can flow out rapidly. Through the grouping design of the supporting legs, automatic inclination after stirring is achieved, and the discharging efficiency is improved.

Description

Technical Field

[0001] This utility model relates to a mixing device, and more particularly to a sand mixer. Background Technology

[0002] Sand mixers are widely used in the foundry industry, primarily to uniformly mix molding sand, binders, and additives to meet the performance requirements of sand molds in the casting process. During operation, operators add various raw materials to the mixer's cylinder in proportion, where they are mixed by a stirring device. Traditional sand mixers typically employ a horizontal cylindrical structure with internal stirring rods or blades, relying on rotation to achieve uniform mixing. After mixing, the mixed sand is discharged by tilting the machine or using a screw conveyor for use in subsequent molding processes.

[0003] Chinese patent document CN215917150U discloses a sand mixer, including a sand mixer body. A stirring rod that can rotate within the sand mixer body and is horizontally arranged on its axis is provided. One end of the stirring rod is provided with an inclined tilting block, and the side of the tilting block closer to the stirring rod is lower than the side of the tilting block away from the stirring rod.

[0004] While the above-mentioned solution improves the mixing effect through the design of the tilting block, its sand mixer body still has a fixed cylindrical structure, relying mainly on the passive pushing of sand during unloading. This design has a significant drawback: because the bottom of the cylinder is curved and there is no active discharge mechanism, some sand tends to remain inside the cylinder and cannot be completely discharged. This not only leads to material waste but may also affect the quality of the next batch of mixed sand, increasing the difficulty and workload of cleaning and maintenance. Utility Model Content

[0005] In view of the shortcomings of the existing technology, this utility model provides a sand mixer that is more conducive to dumping materials.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A sand mixer includes a mixing body, a stirring shaft at the bottom of the mixing body, a plurality of stirring plates extending circumferentially from the stirring shaft, and the stirring plates rotating circumferentially under the drive of the stirring shaft to stir the material in the mixing body. A discharge port for the stirred material to flow into the mixing body is provided on one side of the bottom of the mixing body. A plurality of support legs are provided at the bottom of the mixing body, and a support seat is provided at the bottom of the mixing body to support the mixing body. The plurality of support legs are all provided on the support seat. The plurality of support legs are divided into a fixed group provided near the discharge port and a telescopic group provided on the opposite side of the fixed group. After the stirring is completed, the support legs of the telescopic group can drive the mixing body on that side to rise so that the bottom of the mixing body is inclined downward from the side away from the discharge port towards the discharge port.

[0007] The beneficial effects of this invention are as follows: By dividing the support legs into a fixed group and a telescopic group, and using the telescopic group's support legs to tilt the mixer body after mixing, an inclined structure is formed at the bottom of the mixer body, facilitating the rapid flow of mixed material from the discharge port. This design not only improves discharge efficiency but also reduces material residue, avoiding the hassle of manual cleaning. Furthermore, the support base design effectively enhances the overall stability of the mixer body and reduces vibration during operation. As a preferred approach, an anti-stick coating can be applied to the inner wall of the mixer body to further reduce material adhesion and improve discharge efficiency; simultaneously, rubber pads are placed at the bottom of the support base to further increase friction on the ground and prevent slippage during tipping.

[0008] Furthermore, each of the support legs of the telescopic assembly is equipped with a telescopic cylinder, which is fixed inside the support leg and its top rod is connected to the support base.

[0009] By incorporating telescopic cylinders within the support legs of the telescopic assembly, the sand mixer achieves automated tilting, enabling unloading without additional manual intervention. The telescopic cylinders are simple in structure and easy to control, allowing for precise adjustment of the mixer's tilt angle to accommodate different material unloading requirements. Furthermore, the design of fixing the telescopic cylinders inside the support legs saves space, enhances the overall structural compactness, and reduces the possibility of external interference. As a preferred approach, a buffer pad can be added between the telescopic cylinder's push rod and the support base to reduce the impact force generated during telescopic movement, extending the equipment's lifespan. Additionally, the stroke range of the telescopic cylinders can be customized according to the dimensions of the sand mixer to meet the needs of different specifications.

[0010] Furthermore, each of the fixed support legs is provided with an auxiliary support leg that is inclined downwards towards the ground. When the sand mixer body pours materials, the auxiliary support leg and the bottom surface of the fixed support leg are simultaneously pressed against the ground.

[0011] By adding auxiliary support legs to the fixed support legs, additional support points are provided when the sand mixer body tilts, significantly improving the stability of the equipment and preventing the risk of tipping over due to a shift in the center of gravity. The auxiliary support legs, working together with the fixed support legs, form a stable triangular support structure, ensuring the equipment remains balanced during unloading. Furthermore, the design of the auxiliary support legs also distributes some weight, reducing the stress on the fixed support legs and extending their service life. As a preferred method, adjustable-height anchor bolts can be installed at the bottom of the auxiliary support legs to adjust the equipment's level on uneven ground, further improving its adaptability and stability. Simultaneously, the angle of the auxiliary support legs can be fine-tuned according to actual needs to optimize the support effect.

[0012] Furthermore, the support legs of the telescopic group and the support legs of the fixed group are symmetrically distributed on both sides of the center of the sand mixer body.

[0013] The symmetrical design ensures more even stress distribution on the sand mixer body during tilting, preventing structural deformation or damage caused by excessive stress on one side. The symmetrically distributed support legs effectively distribute the weight of the sand mixer body, improving the overall rigidity and vibration resistance of the equipment. Furthermore, this layout simplifies installation and commissioning, reducing maintenance costs. As a preferred option, ball joints can be installed at the connection between the top of the support legs and the sand mixer body to allow for some angle variation, accommodating minor displacements during tilting and further enhancing the stability and reliability of the equipment. Simultaneously, the symmetrical design facilitates subsequent modular expansion, such as adding more support legs or additional functional components.

[0014] Furthermore, the support base is provided with an annular railing on the side facing the sand mixer body, the annular railing is provided with a notch for the discharge port to extend out, and several reinforcing rods are provided between the annular railing and the support base.

[0015] By installing a ring-shaped railing on the support base, not only is it protective, preventing foreign objects from entering the bottom of the sand mixer and affecting its operation, but it also enhances the overall strength and rigidity of the support base, reducing vibration and noise during equipment operation. The reinforcing bar design between the ring-shaped railing and the support base further improves structural stability, ensuring the equipment maintains good performance even after prolonged use. Furthermore, the notch design on the ring-shaped railing is strategically placed to avoid interfering with the discharge port. As a preferred approach, an anti-corrosion coating can be applied to the outside of the ring-shaped railing to improve its corrosion resistance and extend its service life. Simultaneously, the number and placement of the reinforcing bars can be optimized according to the size and weight of the sand mixer to achieve the best support effect and material utilization. Attached Figure Description

[0016] Figure 1 This is an isometric view of an embodiment of the present utility model;

[0017] Figure 2 This is a partial sectional view of the interior of the sand mixer body according to an embodiment of the present invention. Detailed Implementation

[0018] This utility model embodiment provides a sand mixer, such as... Figure 1-2As shown: The sand mixer includes a mixing body 1. A stirring shaft 11 is installed at the bottom inside the mixing body 1, and several stirring plates 111 extend circumferentially along the stirring shaft 11. These stirring plates 111 can rotate under the drive of the stirring shaft 11, thereby stirring the material inside the mixing body 1. A discharge port 12 is also provided on one side of the bottom of the mixing body 1 for discharging the stirred material. The bottom of the mixing body 1 is fixed to the ground by several support legs 2, which are mounted on a support base 3.

[0019] The support legs 2 are divided into two groups: a fixed group 21 on the side closer to the discharge port 12 and a telescopic group 22 on the side farther from the discharge port 12. The support legs 2 of the fixed group 21 are directly fixed to the support base 3, while the support legs 2 of the telescopic group 22 are equipped with telescopic cylinders 22. The push rod 221 of the telescopic cylinder 22 is connected to the support base 3, which can drive the support legs 2 of the telescopic group 22 to move up and down. After mixing is completed, the telescopic cylinder 221 is activated, pushing the support legs 2 of the telescopic group 22 to rise, thereby making the bottom of the sand mixer body 1 tilted downwards from the side farther from the discharge port 12 towards the discharge port 12, so that the material can flow out from the discharge port 12.

[0020] To enhance the stability of the sand mixer 1 when dumping materials, auxiliary support legs 211 are also provided on the support legs 2 of the fixed assembly 21. These auxiliary support legs 211 are arranged inclined downwards towards the ground. When the sand mixer 1 dumps materials, the bottom surfaces of the auxiliary support legs 211 and the support legs 2 of the fixed assembly 21 simultaneously contact the ground, providing auxiliary support. In addition, the support legs 2 of the telescopic assembly 22 and the support legs 2 of the fixed assembly 21 are symmetrically distributed on both sides of the center of the sand mixer 1, ensuring the balance of the entire equipment.

[0021] A ring-shaped railing 31 is also provided on the side of the support base 3 facing the sand mixer body 1. A notch 311 is opened on the ring-shaped railing 31 for the discharge port 12 to extend out. The ring-shaped railing 31 is connected to the support base 3 by several reinforcing rods 32 to improve the strength and stability of the overall structure.

[0022] The working principle of this sand mixer is as follows: During normal mixing, the support legs 2 of the telescopic group 22 remain in their initial positions, the mixer body 1 is horizontal, and the mixing shaft 11 drives the mixing plate 111 to rotate, thoroughly mixing the material. After mixing is complete, the telescopic cylinder 221 is activated, pushing the support legs 2 of the telescopic group 22 upwards, causing the bottom of the mixer body 1 to tilt. Under gravity, the material automatically flows to the discharge port 12 and is discharged. Simultaneously, the mixing shaft 11 can continue to drive the mixing plate 111 to rotate at a lower angle, quickly discharging the mixed material from inside the mixer body 1. During this process, the support legs 2 of the fixed group 21 and the auxiliary support legs 21 mounted on them work together to ensure the stability of the mixer body 1.

[0023] As a preferred embodiment, one end of the support leg 2 of the telescopic assembly 22 is fixed to the ground.

[0024] As a preferred embodiment, the side of the auxiliary support leg 211 facing the ground is inclined, and the inclination angle is parallel to the ground after the support leg 2 of the telescopic assembly 22 lifts the sand mixer body 1.

[0025] The above embodiments are merely one preferred embodiment of the present utility model. Ordinary changes and substitutions made by those skilled in the art within the scope of the present utility model's technical solution are all included within the protection scope of the present utility model.

Claims

1. A sand mixer, comprising a mixing body, a stirring shaft disposed at the bottom of the mixing body, a plurality of stirring plates extending circumferentially from the stirring shaft, the stirring plates rotating circumferentially under the drive of the stirring shaft to stir the material inside the mixing body, a discharge port for the stirred material to flow into the mixing body being disposed on one side of the bottom of the mixing body, and a plurality of support legs disposed at the bottom of the mixing body, characterized in that: It also includes a support base set at the bottom of the sand mixer body to support the sand mixer body. Several of the support legs are set on the support base. The several support legs are divided into a fixed group set near the discharge port and a telescopic group set on the opposite side of the fixed group. After the mixing is completed, the support legs of the telescopic group can drive the sand mixer body on that side to rise so that the bottom of the sand mixer body is inclined downward from the side away from the discharge port towards the discharge port side.

2. The sand mixer according to claim 1, characterized in that: Each support leg of the telescopic assembly is equipped with a telescopic cylinder, which is fixed inside the support leg and its top rod is connected to the support base.

3. The sand mixer according to claim 2, characterized in that: Each of the fixed support legs is equipped with an auxiliary support leg that is inclined downwards towards the ground. When the sand mixer body pours materials, the auxiliary support leg and the bottom surface of the fixed support leg simultaneously abut against the ground.

4. The sand mixer according to claim 3, characterized in that: The support legs of the telescopic group and the support legs of the fixed group are symmetrically distributed on both sides of the center of the sand mixer body.

5. The sand mixer according to claim 1, characterized in that: The support base is provided with an annular railing on the side facing the sand mixer body. The annular railing has a notch for the discharge port to extend out. Several reinforcing rods are provided between the annular railing and the support base.

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