Rapid cooling facility for sand box

Abstract

The utility model relates to a quick cooling facility for a sand box, which comprises a cooling part, a casting and the sand box, the cooling part comprises cooling sand and a cooling pipe, the cooling sand and the casting are arranged in the sand box, and the cooling pipe is buried in the cooling sand and arranged around the casting. The cooling device has the effects that the cooling speed of a casting in the sand box is increased, sectional temperature control cooling can be realized, and additional power equipment is not needed.

Description

Technical Field

[0001] The utility model relates to the technical field of cast iron cooling, in particular to a rapid cooling facility for a sand box. Background Art

[0002] The foundry industry is one of the country's basic industries, and its products involve military, civil, aerospace, railway, automobile, power equipment, infrastructure, and various industrial and agricultural machinery manufacturing. Castings are referred to as castings, which are divided into non-ferrous castings and ferrous castings. Ferrous castings are further divided into cast iron castings and steel castings.

[0003] Sand boxes are often used in the production of castings. According to the type of sand, casting is often divided into green sand, resin sand, iron mold covered sand, V-method molding, etc. Among them, green sand has its own unique characteristics, such as low cost and easy large-scale automated molding production. However, green sand also has its own disadvantages. First, the cooling speed is slow. The green sand sand box cooling can only rely on the heat conduction of the sand box to gradually dissipate the heat in the sand mold. Secondly, the green sand sand box is often small, and the space for placing the chiller is limited. For castings with slightly complex structures, it is very difficult to place the chiller during process design. Thirdly, the chiller usually contacts the casting, so the surface of the casting will be rough and ugly, and a chill layer will be formed. These chill layers have higher hardness, which often leads to uneven hardness and affects the processing performance. These problems are not only common to green sand, but also to small sand boxes. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a rapid cooling facility for a sand box. The utility model has the effects of accelerating the cooling speed of castings in the sand box, realizing segmented temperature-controlled cooling and not requiring the addition of additional power equipment. It is simple and practical, can replace traditional chillers, save costs, and thus improve the defects and problems on the surface of castings caused by the use of chillers.

[0005] The above utility model object of the utility model is achieved through the following technical solutions:

[0006] A rapid cooling facility for a sand box comprises a cooling part, a casting and a sand box, wherein the cooling part comprises cooling sand and a cooling pipe, the cooling sand and the casting are arranged inside the sand box, and the cooling pipe is buried in the cooling sand and arranged around the casting.

[0007] As a further technical solution of the utility model: the sand box is a vertical type divided sand box, in which the cooling pipe includes a vertical divided cooling pipe and a first extended air pipe, one end of the first extended air pipe is coplanarly connected with the vertical divided cooling pipe, and the other end of the first extended air pipe extends to the outside of the vertical type divided sand box;

[0008] The vertical parting sand box is divided into a vertical parting left sand box and a vertical parting right sand box with a vertical parting cooling pipe as a boundary.

[0009] As a further technical solution of the utility model: a first air outlet cover is installed at one end of the first extended air pipe away from the vertical split cooling pipe, and a first air inlet cover is installed at the end of the vertical split cooling pipe away from the first extended air pipe.

[0010] As a further technical solution of the utility model: the first air inlet cover comprises a first baffle, a first stop bolt and a first rotating shaft, the first rotating shaft is rotatably connected to the outer wall of the vertical sand dividing box, and the first baffle is fixedly connected to the side wall of the first rotating shaft through a second connecting rod;

[0011] When the first baffle is in a horizontal state, one end of the first stop bolt is fixedly connected to the outer wall of the vertical sand dividing box and is located below the first connecting rod to limit the rotation of the first connecting rod.

[0012] As a further technical solution of the utility model: the vertical parting cooling pipes are provided in two pieces, the two vertical parting cooling pipes are respectively provided around the casting, and the two vertical parting cooling pipes are provided symmetrically with respect to the central axis of the vertical parting sand box.

[0013] In addition, the present invention also provides a rapid cooling facility for a sand box, wherein the sand box is a horizontally split sand box, in which the cooling pipe comprises a horizontally split cooling pipe and a second extended air pipe, one end of the second extended air pipe is connected to the horizontally split cooling pipe, and the other end of the second extended air pipe extends to the outside of the horizontally split sand box;

[0014] The horizontal parting sand box is divided into a horizontal parting upper sand box and a horizontal parting lower sand box with the horizontal parting cooling pipe as a boundary.

[0015] As a further technical solution of the utility model: a second air outlet cover is installed at one end of the second extended air pipe away from the horizontally split cooling pipe, and a second air inlet cover is installed at the end of the vertically split cooling pipe away from the second extended air pipe.

[0016] As a further technical solution of the utility model: the second air inlet cover comprises a second baffle, a second stop bolt and a second rotating shaft, the second rotating shaft is rotatably connected to the outer wall of the horizontal parting sand box, and the second baffle is fixedly connected to the side wall of the second rotating shaft through a second connecting rod;

[0017] When the second baffle is in a horizontal state, one end of the second stop bolt is fixedly connected to the outer wall of the horizontal parting sand box and is located below the second connecting rod to limit the rotation of the second connecting rod.

[0018] As a further technical solution of the utility model: the horizontal parting cooling pipes are provided in two pieces, the two horizontal parting cooling pipes are respectively arranged around the casting, and the two horizontal parting cooling pipes are arranged symmetrically with respect to the central axis of the horizontal parting sand box.

[0019] The horizontal split cooling pipe is connected with a vertical pipe, the vertical pipe is perpendicular to the plane of the horizontal split cooling pipe, and one end of the vertical pipe away from the horizontal split cooling pipe is connected to the second extended air pipe.

[0020] As a further technical solution of the utility model: the distance between the cooling pipe and the surface of the casting is 2-10 mm, and the distance between the cooling pipe and the surface of the casting at the position where the pipe is about to leave the surface of the casting and turn upward is less than 5 mm.

[0021] In summary, the present invention includes at least one of the following beneficial technical effects:

[0022] 1. By adopting this casting cooling device, especially its cooling pipe and extended air pipe design, the traditional chilling iron method can be replaced. This design speeds up the cooling of the casting in the sand box because the cooling pipe can effectively take away the heat around the casting. This not only improves the surface quality of the casting, but also reduces the surface defects that may be caused by the use of traditional chilling iron, such as cold shut and shrinkage. More importantly, this cooling method can be carried out continuously without being limited by the heat capacity of the chilling iron, thus ensuring the quality stability of the casting throughout the cooling process.

[0023] 2. Another significant advantage of this technical solution is that it can achieve segmented temperature-controlled cooling. In the high-temperature zone, rapid cooling is used to refine the grains and structure, thereby improving the material properties of the casting. In the low-temperature zone, slow cooling is used to eliminate internal stress and reduce the risk of cracks or deformation of the casting caused by rapid cooling. This segmented temperature control method also helps to reduce the subsequent aging time of the casting and improve production efficiency. Overall, this temperature control method not only optimizes the material properties of the casting, but also improves the overall quality and durability of the product.

[0024] 3. This technical solution is simple and practical. It does not require the addition of additional power equipment. It only achieves effective cooling of castings through reasonable structural design and physical principles (such as the chimney effect). This simplicity not only reduces the complexity and maintenance costs of the equipment, but also makes this technical solution easy to implement and promote in production environments of all sizes. By reducing dependence on traditional cold iron and saving additional energy consumption, this technical solution significantly reduces production costs, while improving production efficiency and product quality, bringing economic benefits to the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a cross-sectional view of the first embodiment of the utility model;

[0026] Figure 2 This is an internal structure analysis diagram of the first embodiment of the utility model;

[0027] Figure 3 For the first embodiment of the utility model Figure 2 A partial enlarged schematic diagram of part A;

[0028] Figure 4 It is a cross-sectional view of the second embodiment of the utility model;

[0029] Figure 5 This is an internal structure analysis diagram of the second embodiment of the utility model;

[0030] Figure 6 For the second embodiment of the utility model Figure 5 A partial enlarged schematic diagram of part B;

[0031] Figure markings: 11, vertical parting sand box; 111, vertical parting left sand box; 112, vertical parting right sand box; 21, vertical parting cooling pipe; 31, first extended air pipe; 41, first air outlet cover; 51, first air inlet cover; 511, first baffle; 512, first stop bolt; 513, first rotating shaft; 514, first connecting rod; 12, horizontal parting sand box; 121, horizontal parting upper sand box; 122, horizontal parting lower sand box; 22, horizontal parting cooling pipe; 32, second extended air pipe; 42, second air outlet cover; 52, second air inlet cover; 521, second baffle; 522, second stop bolt; 523, second rotating shaft; 524, second connecting rod, 61 vertical pipe. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application; obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application without making creative work are within the scope of protection of the present application.

[0033] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0034] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0035] Embodiment 1:

[0036] Reference Figure 1 The utility model discloses a rapid cooling facility for a sand box, comprising a cooling unit, a casting and a vertical sand box 11. In this embodiment, the vertical sand box 11 is in a rectangular shape, the cooling unit comprises cooling sand and a cooling pipe, the cooling sand and the casting are arranged inside the sand box, the cooling pipe is buried in the cooling sand and arranged around the casting.

[0037] Reference Figure 2 The cooling pipe includes a vertical parting cooling pipe 21 and a first extended air pipe 31. One end of the first extended air pipe 31 is in coplanar communication with the vertical parting cooling pipe 21, and the other end of the first extended air pipe 31 extends to the outside of the vertical parting sand box 11. The vertical parting sand box 11 is divided into a vertical parting left sand box 111 and a vertical parting right sand box 112 with the vertical parting cooling pipe 21 as the boundary.

[0038] When the molten metal is poured into the vertical mold sand box 11, the temperature of the vertical mold sand box 11 instantly rises to more than 1000°C, and the temperature of the molding sand on the surface of the casting will also instantly rise, forming a dry sand area. The air temperature in the vertical mold cooling pipe 21 will also rise sharply synchronously, but the air temperature in the first extended air pipe 31 is still at room temperature. The temperature difference of the air on both sides brings a pressure difference, thus forming a chimney effect. The air will automatically be sucked in from the air inlet and discharged from the exhaust hole, discharging the heat in the vertical mold sand box 11, continuously reducing the temperature of the vertical mold cooling pipe 21, and then reducing the temperature of the dry sand area on the surface of the casting, accelerating the cooling of the casting.

[0039] The vertical mold splitting flask 11 is divided into a vertical mold splitting left flask 111 and a vertical mold splitting right flask 112 with the vertical mold splitting cooling pipe 21 as a boundary.

[0040] A first air outlet cover 41 is installed at one end of the first extended air pipe 31 away from the vertical split cooling pipe 21 , and a first air inlet cover 51 is installed at the end of the vertical split cooling pipe 21 away from the first extended air pipe 31 .

[0041] Reference Figure 3 The first air inlet cover 51 includes a first baffle 511, a first stop bolt 512 and a first rotating shaft 513. The first rotating shaft 513 is rotatably connected to the outer wall of the vertical sand box 11. The first baffle 511 is fixedly connected to the side wall of the first rotating shaft 513 through a first connecting rod 514. When the first baffle 511 is in a horizontal state, one end of the first stop bolt 512 is connected to the outer wall of the sand box and is located below the first connecting rod 514 to limit the rotation of the first connecting rod 514.

[0042] The above technical solution is connected to the outer wall of the vertical sand box 11 through one end of the first stop bolt 512 to limit the rotation of the first connecting rod 514, thereby opening or closing the air inlet. When the air inlet needs to be opened, the first rotating shaft 513 is rotated to place the first baffle 511 in a horizontal direction. At this time, the first stop bolt 512 will block the first baffle 511 to prevent it from rotating due to gravity or other external forces, ensuring that the air inlet remains open. One end of the first stop bolt 512 can be fixedly connected to the outer wall of the vertical sand box 11, or it can be movably connected to the outer wall of the vertical sand box 11. When one end of the first stop bolt 512 is movably connected to the outer wall of the vertical sand dividing box 11, the first stop bolt 512 is removed. At this time, the first baffle 511 will naturally sag under the action of gravity to close the air inlet. When one end of the first stop bolt 512 can be fixedly connected to the outer wall of the vertical sand dividing box 11, the first rotating shaft 513 is rotated counterclockwise to place the first baffle 511 in a vertical direction to close the air inlet and prevent air circulation, thereby realizing flexible control of the air inlet switch.

[0043] After the temperature of the vertical sand box 11 drops to a certain level, the first air inlet cover 41 is closed and the first air outlet cover 51 is covered. As the air temperature in the cooling pipe continues to drop, the air pressure therein decreases, and under the action of the external atmospheric pressure, the first air inlet cover 41 and the first air outlet cover 51 will be completely sealed, the air in the cooling pipe will stop circulating, and the entire vertical sand box 11 will begin to cool naturally.

[0044] Two vertical parting cooling pipes 21 are provided, and the two vertical parting cooling pipes 21 are respectively provided around the casting. The two vertical parting cooling pipes 21 are provided symmetrically with respect to the central axis of the vertical parting sand box 11. The vertical parting cooling pipes 21 can be divided into different sections according to the different shapes of the casting and surround the casting. This design ensures the uniformity and high efficiency of the cooling effect.

[0045] In this embodiment, the distance between the cooling pipe and the surface of the casting is 2-10 mm, and the distance between the cooling pipe and the surface of the casting at the position where the pipe is about to leave the surface of the casting and turn upward is less than 5 mm. The temperature difference between the first extended air pipe 31 and the external gas becomes larger. Under the action of the external atmospheric pressure, the gas in the driving pipe is accelerated to flow in from the air inlet and out from the air outlet, thereby accelerating the cooling speed of the casting.

[0046] The vertically divided cooling pipe 21 is made of a steel pipe, and the first extended air pipe 31 is made of a refractory material, which is a ceramic pipe or a glass fiber pipe.

[0047] The steel pipe used in the above technical solution has good high temperature resistance, high strength, pressure resistance and thermal conductivity. Castings often generate a lot of heat during the production process, and the cooling device needs to be able to withstand high temperature environments. The high temperature resistance of the steel pipe enables it to maintain stable performance at high temperatures and ensure the cooling effect. In addition, the steel pipe has high strength and good pressure resistance, which can withstand the pressure inside the cooling system and the load of the external environment, ensuring the safe operation of the cooling device. Moreover, the thermal conductivity of steel is relatively good, which can quickly transfer the heat generated by the casting and improve the cooling efficiency.

[0048] Embodiment 2:

[0049] Reference Figure 4 and Figure 5 , which is the second embodiment of the utility model, and the difference from the first embodiment is that the sand box is a horizontal parting sand box 12. In the horizontal parting sand box 12, the cooling pipe includes a horizontal parting cooling pipe 22 and a second extended air pipe 32. The horizontal parting cooling pipe 22 is horizontally arranged, one end of the second extended air pipe 32 is communicated with the horizontal parting cooling pipe 22, and the other end of the second extended air pipe 32 extends to the outside of the horizontal parting sand box 12. The horizontal parting sand box 12 is divided into a horizontal parting upper sand box 121 and a horizontal parting lower sand box 122 with the horizontal parting cooling pipe 22 as the boundary.

[0050] A second air outlet cover 42 is installed at one end of the second extended air pipe 32 away from the horizontal split cooling pipe 22 , and a second air inlet cover 52 is installed at the end of the horizontal split cooling pipe 22 away from the second extended air pipe 32 .

[0051] Reference Figure 6 The second air inlet cover 52 includes a second baffle 521, a second stop bolt 522 and a second rotating shaft 523. The second rotating shaft 523 is rotatably connected to the outer wall of the horizontal parting sand box 12. The second baffle 521 is fixedly connected to the side wall of the second rotating shaft 523 through a second connecting rod 524. When the second baffle 521 is in a horizontal state, one end of the second stop bolt 522 is connected to the outer wall of the horizontal parting sand box 12 and is located below the second connecting rod 524 to limit the rotation of the second connecting rod 524.

[0052] Two horizontal parting cooling pipes 22 are provided, and the two horizontal parting cooling pipes 22 are respectively provided around the casting, and the two horizontal parting cooling pipes 22 are provided symmetrically with respect to the central axis of the horizontal parting sand box 12 .

[0053] Reference Figure 5 The horizontal split cooling pipe 22 is connected to a vertical pipe 61 , and the vertical pipe 61 is perpendicular to the plane of the horizontal split cooling pipe 22 . One end of the vertical pipe 61 away from the horizontal split cooling pipe 22 is connected to the second extended air pipe 32 .

[0054] In general, the second embodiment provides a casting cooling solution that adapts to different scenarios and needs by adjusting the arrangement of the horizontal parting sand box 12 and the horizontal parting cooling pipe 22 and optimizing the design of the air inlet and the air outlet. This design also uses natural principles such as the chimney effect to accelerate the cooling process of the casting, thereby improving production efficiency and product quality.

[0055] The embodiments of this specific implementation method are all preferred embodiments of the utility model, and are not intended to limit the protection scope of the utility model. Therefore, all equivalent changes made based on the structure, shape, and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A rapid cooling facility for a sand box, characterized in that: It comprises a cooling part, a casting and a sand box. The cooling part comprises cooling sand and a cooling pipe. The cooling sand and the casting are arranged inside the sand box. The cooling pipe is buried in the cooling sand and arranged around the casting.

2. A rapid cooling facility for a sand box according to claim 1, characterized in that: The sand box is a vertical sand box (11), in which the cooling pipe comprises a vertical split cooling pipe (21) and a first extended air pipe (31), one end of the first extended air pipe (31) is connected to the vertical split cooling pipe (21) and communicates with each other in the same plane, and the other end of the first extended air pipe (31) extends to the outside of the vertical sand box (11); The vertical mold splitting sand box (11) is divided into a vertical mold splitting left sand box (111) and a vertical mold splitting right sand box (112) with the vertical mold splitting cooling pipe (21) as a boundary.

3. A rapid cooling facility for a sand box according to claim 2, characterized in that: A first air outlet cover (41) is installed at one end of the first extended air pipe (31) away from the vertical split cooling pipe (21), and a first air inlet cover (51) is installed at the end of the vertical split cooling pipe (21) away from the first extended air pipe (31).

4. A rapid cooling facility for a sand box according to claim 3, characterized in that: The first air inlet cover (51) comprises a first baffle (511), a first stop bolt (512) and a first rotating shaft (513); the first rotating shaft (513) is rotatably connected to the outer wall of the vertical sand dividing box (11); the first baffle (511) is fixedly connected to the side wall of the first rotating shaft (513) via a first connecting rod (514); When the first baffle (511) is in a horizontal state, one end of the first stop bolt (512) is connected to the outer wall of the vertical sand dividing box (11) and is located below the first connecting rod (514) to limit the rotation of the first connecting rod (514).

5. The rapid cooling facility for a sand box according to claim 2, characterized in that: The two vertical mold splitting cooling pipes (21) are arranged in two numbers, and the two vertical mold splitting cooling pipes (21) are arranged around the casting respectively, and the two vertical mold splitting cooling pipes (21) are arranged symmetrically with respect to the central axis of the vertical mold splitting sand box (11).

6. A rapid cooling facility for a sand box according to claim 2, characterized in that: The sand box is a horizontal parting sand box (12), in which the cooling pipe comprises a horizontal parting cooling pipe (22) and a second extended air pipe (32), one end of the second extended air pipe (32) is connected to and communicates with the horizontal parting cooling pipe (22), and the other end of the second extended air pipe (32) extends to the outside of the horizontal parting sand box (12); The horizontal parting sand box (12) is divided into a horizontal parting upper sand box (121) and a horizontal parting lower sand box (122) by the horizontal parting cooling pipe (22).

7. A rapid cooling facility for a sand box according to claim 6, characterized in that: A second air outlet cover (42) is installed at one end of the second extended air pipe (32) away from the horizontal split cooling pipe (22), and a second air inlet cover (52) is installed at the end of the vertical split cooling pipe (21) away from the second extended air pipe (32).

8. A rapid cooling facility for a sand box according to claim 7, characterized in that: The second air inlet cover (52) comprises a second baffle (521), a second stop bolt (522) and a second rotating shaft (523); the second rotating shaft (523) is rotatably connected to the outer wall of the horizontal parting sand box (12); the second baffle (521) is fixedly connected to the side wall of the second rotating shaft (523) via a second connecting rod (524); When the second baffle (521) is in a horizontal state, one end of the second stop bolt (522) is connected to the outer wall of the horizontal parting sand box (12) and is located below the second connecting rod (524) to limit the rotation of the second connecting rod (524).

9. The rapid cooling facility for a flask according to claim 6, characterized in that: The horizontal parting cooling pipes (22) are provided in two pieces, and the two horizontal parting cooling pipes (22) are respectively arranged around the casting, and the two horizontal parting cooling pipes (22) are arranged symmetrically with respect to the central axis of the horizontal parting sand box (12); The horizontal split cooling pipe (22) is connected to a vertical pipe (61), the vertical pipe (61) is perpendicular to the plane of the horizontal split cooling pipe (22), and one end of the vertical pipe (61) away from the horizontal split cooling pipe (22) is connected to the second extended air pipe (32).

10. A rapid cooling facility for a sand box according to any one of claims 1 to 9, characterized in that: The distance between the cooling pipe and the surface of the casting is 2-10 mm, and the distance between the cooling pipe and the surface of the casting at the position where the pipe is about to leave the surface of the casting and turn upward is less than 5 mm.

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