Casting sand mixing device

Abstract

The utility model relates to the field of casting equipment, in particular to a sand mixing device for casting. The device comprises a base, a mixing barrel, an air cylinder, a stirring mechanism and a motor. Two rectangular fixing blocks are symmetrically arranged on the base, the outer walls of the two sides of the mixing barrel are hinged to the fixing blocks through a first connecting rod and a second connecting rod, the cylinder body end of the air cylinder is hinged to the side edge of the base, the piston rod end is hinged to the midpoint of the first connecting rod, and the air cylinder stretches to drive the mixing barrel to topple. The stirring mechanism comprises a horizontal stirring shaft, connecting rod assemblies and arc-shaped stirring blades, the two ends of the stirring shaft penetrate through the side wall of the mixing barrel, the connecting rod assemblies are equidistantly distributed along the shaft, the arc-shaped stirring blades are fixed to the tail ends of the connecting rods in a spiral line track, and the motor drives the stirring shaft to rotate. The sand mixing device is reasonable in structure, capable of effectively improving the sand mixing uniformity and suitable for sand mixing in the casting industry.

Description

Technical Field

[0001] This application relates to the field of casting production and processing, specifically to a sand mixing device for casting. Background Technology

[0002] In the foundry industry, sand mixing equipment is one of the key pieces of equipment, mainly used to mix different types of sand in a certain proportion to achieve the performance requirements of casting. Traditional sand mixing equipment usually adopts a simple mechanical stirring method, mixing sand materials through rotating blades. However, this method has many shortcomings: firstly, some equipment uses a vertical stirring shaft structure, which has a stirring blind zone, resulting in insufficient mixing uniformity; secondly, the mixing efficiency is low, making it difficult to achieve uniform mixing, leading to unstable quality of cast products. Utility Model Content

[0003] The purpose of this utility model is to provide a sand mixing device for foundry use, so as to solve the problems mentioned in the background art. To achieve the above objective, this application provides the following technical solution: a sand mixing device for foundry use, comprising:

[0004] A base, on which two rectangular fixing blocks are symmetrically arranged;

[0005] The mixing cylinder has its outer walls on both sides hinged to the corresponding fixed blocks via a first connecting rod and a second connecting rod. The two hinge points on the fixed blocks that are connected to the first connecting rod and the second connecting rod are located at opposite ends of the diagonal of the fixed blocks.

[0006] The cylinder has its cylinder body hinged to the side of the base and its piston rod hinged to the midpoint of the first connecting rod. When the cylinder extends or retracts, it drives the mixing cylinder to tilt through the first connecting rod.

[0007] A stirring mechanism includes a horizontal stirring shaft, a connecting rod assembly, and an arc-shaped stirring blade. The two ends of the horizontal stirring shaft pass through the two side walls of the mixing cylinder via bearings. The connecting rod assembly is equidistantly distributed along the axial direction of the horizontal stirring shaft. The connecting rod assembly includes three radial connecting rods evenly distributed circumferentially on the outer wall of the horizontal stirring shaft. The arc-shaped stirring blade is fixed to the radial end of the connecting rod of the adjacent connecting rod assembly along a helical trajectory along the axial direction of the stirring shaft. The bending direction of the arc-shaped stirring blade is consistent with the rotation direction of the stirring shaft.

[0008] An electric motor is installed on the side wall of the mixing cylinder and connected to the horizontal stirring shaft to drive the stirring mechanism to rotate.

[0009] In a preferred embodiment of this technical solution, the fixing block has a notch located within the piston rod movement trajectory plane of the cylinder.

[0010] In a preferred embodiment of this technical solution, at least three sets of the connecting rod assembly are provided.

[0011] In a preferred embodiment of this technical solution, a circumferential misalignment angle of 10-15° is provided between the radial connecting rods of adjacent connecting rod assemblies.

[0012] In a preferred embodiment of this technical solution, the cylinders are hinged to both sides of the mixing cylinder via the first connecting rod on the corresponding side.

[0013] In a preferred embodiment of this technical solution, the top of the mixing cylinder is provided with a feed inlet, and the feed inlet is provided with an openable cover plate, which is connected to the mixing cylinder by a hinge.

[0014] Compared with the prior art, the beneficial effects of this application are:

[0015] By employing a horizontal stirring shaft and arc-shaped stirring blades, the blades are distributed along a spiral trajectory along the shaft axis, ensuring complete coverage of the sand within the mixing cylinder and effectively eliminating blind spots. The curvature of the arc-shaped blades aligns with the rotation direction of the stirring shaft, further enhancing the mixing effect and resulting in more uniform force and movement of the sand during mixing, thus significantly improving mixing uniformity. Furthermore, the cylinder drives the mixing cylinder to tilt, further promoting dynamic mixing of the sand, greatly improving mixing efficiency, shortening mixing time, and increasing production efficiency during unloading. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of a sand mixing device for casting proposed in the embodiments of this application;

[0017] Figure 2 This is a three-dimensional schematic diagram of the internal structure of a sand mixing device for casting proposed in an embodiment of this application;

[0018] Figure 3 This is a three-dimensional schematic diagram of the fixed block;

[0019] In the diagram: 1. Base; 2. Fixing block; 3. Mixing cylinder; 4. First connecting rod; 5. Second connecting rod; 6. Cylinder; 7. Stirring mechanism; 8. Horizontal stirring shaft; 9. Connecting rod assembly; 10. Arc-shaped stirring blade; 11. Connecting rod; 12. Motor; 13. Notch; 14. Feed inlet; 15. Cover plate. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] It should be noted that in the description of this application, the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0022] Furthermore, it should be understood that, for ease of description, the dimensions of the various components shown in the accompanying drawings are not drawn to actual scale; for example, the thickness or width of some layers may be exaggerated relative to other layers.

[0023] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined or described in one figure, it will not need to be discussed or described in detail in the description of the subsequent figures.

[0024] To understand this application, it is necessary to understand its application scenario. In the welding process of many alloy steels, two components are often connected, so it is necessary to fix and fit component A and component B separately at the same time.

[0025] In order to solve the technical problems in the background art, such as Figure 1-3 As shown, this application provides a technical solution: a sand mixing device for casting, characterized as follows:

[0026] The base 1 is the fundamental support component of the entire device, made of high-strength steel to ensure the stability and durability of the device. The base 1 can be platform-shaped or have a support frame-like structure. Two rectangular fixing blocks 2 are symmetrically arranged on the upper surface of the base 1. The mixing cylinder 3 is the main container for holding and mixing foundry sand. Both its outer walls are equipped with first connecting rods 4 and second connecting rods 5, which are hinged to the corresponding fixing blocks 2. Specifically, the two hinge points on the fixing blocks 2 with the first connecting rods 4 and 5 are located at opposite ends of the diagonal of the fixing blocks 2. This arrangement ensures the stability and uniformity of the mixing cylinder 3 during tilting. The cylinder body of the cylinder 6 is hinged to the side of the base 1, while the piston rod is hinged to the midpoint of the first connecting rod 4. When the cylinder 6 extends or retracts, it drives the mixing cylinder 3 to tilt via the first connecting rod 4. Specifically, when cylinder 6 is activated, the piston rod extends, pushing the first connecting rod 4 upward to support the mixing cylinder 3, thus achieving an upright position. When tilting is required, the piston rod of cylinder 6 retracts, and the first connecting rod 4 drives the mixing cylinder 3 to rotate around the hinge point, achieving tilting. The stirring mechanism 7 includes a horizontal stirring shaft 8, connecting rod assemblies 9, and arc-shaped stirring blades 10. The two ends of the horizontal stirring shaft 8 pass through the two side walls of the mixing cylinder 3 via bearings, ensuring smooth rotation of the horizontal stirring shaft 8. The connecting rod assemblies 9 are equidistantly distributed along the axial direction of the horizontal stirring shaft 8, and each assembly 9 includes three radial connecting rods 11 evenly distributed circumferentially on the outer wall of the horizontal stirring shaft 8. The arc-shaped stirring blades 10 are fixed to the ends of the radial connecting rods 11 of adjacent connecting rod assemblies 9 along a helical trajectory along the axial direction of the horizontal stirring shaft 8. The bending direction of the arc-shaped stirring blades 10 is consistent with the rotation direction of the horizontal stirring shaft 8; this design effectively improves stirring efficiency and mixing uniformity. The motor 12 is located on the side wall of the mixing cylinder 3 and connected to the horizontal stirring shaft 8. The motor 12 drives the stirring mechanism 7 to rotate through the transmission device.

[0027] It should be noted that the fixed block 2 has a notch 13, which is located within the plane of the piston rod's movement trajectory in the cylinder 6. This arrangement allows the piston rod to move at the notch 13 when the cylinder 6 extends or retracts, preventing the fixed block 2 from interfering with its movement and improving the overall reliability and ease of operation of the device.

[0028] Furthermore, at least three sets of connecting rod assemblies 9 are provided. When at least three sets of connecting rod assemblies 9 are provided, it can be ensured that during the stirring process, the arc-shaped stirring blades 10 can perform multi-directional and multi-layer agitation and stirring of the casting sand in the mixing cylinder 3. Specifically, the three sets of connecting rod assemblies 9 are located at different positions on the horizontal stirring shaft 8, so that the stirring range covers most of the area of ​​the mixing cylinder 3, thereby ensuring that the casting sand can be fully mixed and avoiding local uneven mixing.

[0029] It should be noted that a circumferential misalignment angle of 10-15° is provided between the radial connecting rods 11 of adjacent connecting rod assemblies 9. This design is based on the optimization of the stirring effect. Inside the mixing cylinder 3, the horizontal stirring shaft 8 is arranged along its axial direction, and the connecting rod assemblies 9 are equidistantly distributed along the axial direction of the horizontal stirring shaft 8. Each connecting rod assembly 9 contains three radial connecting rods 11 evenly distributed circumferentially on the outer wall of the horizontal stirring shaft 8. A circumferential misalignment angle of 10-15° is provided between the radial connecting rods 11 of adjacent connecting rod assemblies 9. This misalignment design allows the arc-shaped stirring blades 10 to generate different stirring trajectories during the stirring process. When the horizontal stirring shaft 8 rotates, the radial connecting rods 11 of adjacent connecting rod assemblies 9, due to the existence of the circumferential misalignment angle, cause the arc-shaped stirring blades 10 to generate different stirring forces and stirring directions on the material during the stirring process. This design can effectively avoid the formation of stirring dead zones during the mixing process, allowing the material to be mixed more fully and uniformly within the mixing cylinder 3.

[0030] It should be noted that cylinders 6 are hinged to both sides of the mixing cylinder 3 via corresponding first connecting rods 4. This design makes the tilting motion of the mixing cylinder 3 more stable and reliable. The advantage of having cylinders 6 on both sides is that the force on the mixing cylinder 3 is more even during tilting, avoiding instability or damage caused by force on one side. For example, when the mixing cylinder 3 is filled with heavy foundry sand, the cylinders 6 on both sides work synchronously, which can smoothly tilt the mixing cylinder 3, ensuring that the material is poured out evenly, while reducing wear and damage to the equipment.

[0031] It is worth noting that the mixing cylinder 3 is equipped with a feed inlet 14 at the top, and an openable cover 15 is provided at the feed inlet 14. The cover 15 is connected to the mixing cylinder 3 by a hinge. This design allows materials to be poured into the feed inlet 14 by opening the cover 15 when adding materials to the mixing cylinder 3, making the operation simple and convenient. The hinged connection between the cover 15 and the mixing cylinder 3 allows the cover 15 to be easily opened and closed, while also ensuring a tight seal with the mixing cylinder 3 when closed, preventing material leakage or external impurities from entering the mixing cylinder 3 during the mixing process.

[0032] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A foundry sand mixing apparatus characterized by, The utility model relates to a kind of mixing machine, including: Base (1), two rectangular fixed blocks (2) are symmetrically arranged on the base (1); Mixing cylinder (3), both sides outer wall is hinged with corresponding side fixed block (2) by first connecting rod (4) and second connecting rod (5), and the two hinge points of first connecting rod (4) and second connecting rod (5) on fixed block (2) are respectively located at the diagonal ends of fixed block (2); Cylinder (6), the side edge of the cylinder body end of cylinder (6) is hinged with base (1), and piston rod end is hinged in midpoint position of first connecting rod (4), and when cylinder (6) is telescopic, first connecting rod (4) drives mixing cylinder (3) to make dumping movement; Stirring mechanism (7), stirring mechanism (7) includes horizontal stirring shaft (8), connecting rod assembly (9) and arc-shaped stirring blade (10), both ends of horizontal stirring shaft (8) are penetrated through both sides wall of mixing cylinder (3) by bearing, connecting rod assembly (9) is equidistantly distributed along the axial direction of horizontal stirring shaft (8), connecting rod assembly (9) includes three radial connecting rods (11) that are evenly distributed on the outer wall of horizontal stirring shaft (8), and arc-shaped stirring blade (10) is fixed to the end of radial connecting rod (11) of adjacent connecting rod assembly (9) along the axial direction of stirring shaft spiral line track, and the bending direction of arc-shaped stirring blade (10) is consistent with the rotation direction of stirring shaft; Motor (12), motor (12) is arranged in the side wall of mixing cylinder (3), and is connected with horizontal stirring shaft (8), drives stirring mechanism (7) to rotate.

2. The foundry sand mixing apparatus of claim 1, wherein Notch (13) is formed in fixed block (2), and the notch (13) is located in the piston rod movement track plane of cylinder (6).

3. The foundry sand mixing apparatus of claim 1, wherein Connecting rod assembly (9) is provided with at least three groups.

4. The foundry sand mixing apparatus of claim 3, wherein The circumferential misalignment angle between the radial connecting rods (11) of adjacent connecting rod assemblies (9) is 10-15°.

5. The foundry sand mixing apparatus of claim 1, wherein Cylinder (6) is hinged on both sides of mixing cylinder (3) by first connecting rod (4) of corresponding side.

6. The foundry sand mixing apparatus of any one of claims 1-5, wherein, Feeding port (14) is arranged on the top of mixing cylinder (3), openable cover plate (15) is arranged at feeding port (14), and cover plate (15) and mixing cylinder (3) are connected by hinge.

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