Anti-deformation tool for evanescent mode large flat plate type casting and sand box for casting mold

Abstract

The utility model provides an evanescent mode large flat plate type casting anti-deformation tool and a sand box for a casting mold, and the evanescent mode large flat plate type casting anti-deformation tool is arranged in the sand box and comprises two supporting pipes and a plurality of connecting pipes; the two supporting pipes are arranged in the sand box in parallel, and the supporting pipes are vertically arranged; the multiple connecting pipes are arranged at intervals in the vertical direction, the two ends of each connecting pipe are attached to and fixedly connected with the peripheral faces of the two supporting pipes respectively, the pipe body positioning faces of the multiple connecting pipes abut against the same side of a mold, and the multiple connecting pipes are matched to form a main body positioning face. According to the anti-deformation tool for the evanescent mode large flat plate type casting, the supporting pipes are arranged in the sand box, the connecting pipes are installed on the same side faces of the two supporting pipes, the multiple connecting pipes jointly form a main body positioning face, the main body positioning face is matched with filled dry sand to horizontally position a casting mold, and the casting quality of a cast iron flat plate is guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of lost foam casting technology, specifically relating to a tooling for preventing deformation of large flat lost foam castings and a sand box for casting molds. Background Technology

[0002] Lost foam casting is a novel casting method that involves bonding and assembling paraffin or foam models similar in size and shape to the casting into a model cluster. After being coated with refractory paint and dried, the cluster is embedded in dry quartz sand and vibrated to create the model. Under negative pressure, the casting is poured in, causing the model to vaporize and the liquid metal to occupy the model's position. After solidification and cooling, the casting is formed. This process eliminates the need for mold removal, parting lines, and sand cores, resulting in castings free of flash, burrs, and draft angles. It also reduces dimensional errors caused by core assembly, significantly decreasing machining costs and time.

[0003] In the existing technology, large-size cast iron plates are generally manufactured using lost foam casting. Due to their flat structure and low rigidity, large plate molds are prone to bending deformation under gravity when upright. During the dry sand filling process, the vibration of the dry sand will cause the mold to be squeezed and further deformed, resulting in dimensional deviations in the mold cavity of the subsequent casting, affecting the geometric accuracy of the casting, and causing defects in the formed cast iron plate, thus affecting the production quality of the cast iron plate. Utility Model Content

[0004] This utility model provides a tooling for preventing deformation of large flat castings using lost foam casting and a sand box for casting molds, aiming to solve the technical problem in the prior art that the mold is easily deformed when casting cast iron flat plates using lost foam casting, which affects the casting quality.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] Firstly, a deformation-preventing fixture for large flat-plate lost foam castings is provided, which is installed inside a sand box and includes:

[0007] Two support pipes are arranged parallel to each other inside the sand box, and the support pipes are arranged vertically; and

[0008] Multiple connecting pipes are provided, with their long axes parallel to the horizontal direction. The multiple connecting pipes are spaced apart in the vertical direction. The two ends of each connecting pipe are respectively attached to and fixedly connected to the outer peripheral surfaces of two supporting pipes. The side of the connecting pipe facing away from the supporting pipe is the pipe body positioning surface. The pipe body positioning surfaces of the multiple connecting pipes all abut against the same side of the casting mold. The pipe body positioning surfaces of the multiple connecting pipes cooperate to form the main positioning surface.

[0009] In conjunction with the first aspect, in one possible implementation, the connecting pipe includes multiple installation pipes connected end to end in a horizontal direction, with the two installation pipes at both ends respectively attached and fixedly connected to the corresponding support pipe.

[0010] In conjunction with the first aspect, in one possible implementation, the connecting pipe further includes a plurality of fasteners that connect two adjacent mounting pipes and cause the axes of the two adjacent mounting pipes to overlap.

[0011] In conjunction with the first aspect, in one possible implementation, the fixing member is a shaft tube, the inner walls of both ends of the mounting tube are respectively provided with internal thread sleeves with opposite directions of rotation, both ends of the shaft tube are respectively provided with external threads, and both ends of the shaft tube are respectively threadedly engaged with two adjacent internal thread sleeves.

[0012] In conjunction with the first aspect, in one possible implementation, both of the supporting tubes are rectangular tubes, and the opposite sides of the two supporting tubes are parallel to each other.

[0013] The mounting tube is a rectangular tube, and the side of the mounting tube is attached to the side of the support tube.

[0014] In conjunction with the first aspect, in one possible implementation, the anti-deformation tooling for the lost foam large flat casting further includes a winding tape, and the support tube and the connecting tube are bound and fixed together by the winding tape.

[0015] In conjunction with the first aspect, in one possible implementation, a horizontal rod is provided at the bottom of the inside of the support tube, the long axis of the horizontal rod is perpendicular to the long axis of the support tube, and the horizontal rod is connected to the bottom of the sand box so that the axis of the support tube is parallel to the vertical direction.

[0016] The anti-deformation fixture for large flat castings using lost foam casting provided by this utility model, compared with the prior art, utilizes support pipes set inside the sand box, with connecting pipes installed on the same side of two support pipes. Multiple connecting pipes together form the main positioning surface. The main positioning surface limits the casting mold from one side. The worker first fills the casting mold with dry sand from the side away from the connecting pipe. After the dry sand is filled, the casting mold is pushed in a horizontal direction close to the connecting pipe. The main positioning surface and the filled dry sand cooperate to horizontally position the casting mold. When the casting mold is filled with dry sand on the side close to the connecting pipe, the casting mold will not be moved by the impact of the dry sand, improving the stability of the casting mold, avoiding deformation of the casting mold, and ensuring the casting quality of the cast iron flat plate.

[0017] Secondly, a sand box for casting molds is provided, comprising:

[0018] The sand box body has a pouring port at the top;

[0019] As described in any of the above possible implementations, a lost foam casting anti-deformation fixture for large flat plate castings is disposed within the sand box body. The main positioning surface divides the sand box body into a first cavity and a second cavity along its vertical plane. The casting mold is disposed in the first cavity, and the main positioning surface of the casting mold anti-deformation assembly is fitted to the casting mold.

[0020] Dry sand is filled in the first cavity and the second cavity, with the height of the dry sand in the first cavity being higher than the height of the dry sand in the second cavity.

[0021] In conjunction with the second aspect, in one possible implementation, the sand box for casting molds further includes a pneumatic vibrator disposed on the outer periphery of the sand box body to vibrate the dry sand in the first cavity and the second cavity.

[0022] In conjunction with the second aspect, in one possible implementation, the horizontal distance between the axes of the two support tubes within the anti-deformation tooling for the large flat casting in the lost foam casting is greater than the horizontal length of the mold.

[0023] The sand box for casting molds provided by this utility model, compared with the prior art, utilizes support pipes set inside the sand box, with connecting pipes installed on the same side of two support pipes. Multiple connecting pipes together form a main positioning surface. This main positioning surface limits the casting mold from one side. The worker first fills the casting mold with dry sand from the side away from the connecting pipes. After filling, the dry sand pushes the casting mold horizontally near the connecting pipes. The main positioning surface, in conjunction with the filled dry sand, horizontally positions the casting mold. When filling the casting mold with dry sand near the connecting pipes, the casting mold will not be moved by the impact of the dry sand, improving the stability of the casting mold, preventing deformation, and ensuring the casting quality of the cast iron plate. The dry sand height in the first cavity is higher than that in the second cavity. The dry sand in the first cavity can always push the casting mold against the main positioning surface, ensuring that the casting mold will not deform and improving the molding effect. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of a lost foam casting large flat plate anti-deformation tooling provided in an embodiment of the present invention;

[0026] Figure 2This is a front view of a lost foam casting large flat plate anti-deformation tooling provided in another embodiment of the present invention;

[0027] Figure 3 for Figure 2 Assembly diagram of the mounting pipes and fasteners used in the process;

[0028] Figure 4 This is a schematic diagram of the sand filling structure of a sand box for casting molds used in another embodiment of the present invention, wherein the main body of the sand box is a cross-sectional view;

[0029] Figure 5 This is a cross-sectional view of a sand box for casting molds used in another embodiment of the present invention;

[0030] Figure 6 This is a rear cross-sectional view of a sand box for casting molds used in another embodiment of the present invention.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1. Support pipe;

[0033] 2. Connecting pipe; 21. Mounting pipe; 22. Fastener;

[0034] 3. Wrapping tape;

[0035] 4. Horizontal bar;

[0036] 5. Sandbox body; 51. First cavity; 52. Second cavity;

[0037] 6. Dry sand;

[0038] 7. Casting molds. Detailed Implementation

[0039] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0040] 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 a part of the embodiments of this application, and not all of them. The following description of at least one exemplary embodiment is actually illustrative only and is in no way intended to limit this application or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0041] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0042] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0043] It should be noted that the terms "length," "width," "height," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "head," and "tail," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing the invention 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, and therefore should not be construed as a limitation on the utility model. The directional terms "inner" and "outer" refer to the inside or outside relative to the outline of each component itself.

[0044] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "linking," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0045] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways, and the spatial relative descriptions used herein will be interpreted accordingly.

[0046] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Additionally, "multiple" and "several" mean two or more, unless otherwise explicitly specified.

[0047] Please refer to the following: Figures 1 to 6 The present invention describes the anti-deformation fixture for large flat lost foam castings provided by this utility model. The anti-deformation fixture for large flat lost foam castings is installed inside a sand box and includes two support pipes 1 and multiple connecting pipes 2. The two support pipes 1 are arranged parallel to each other in the sand box, with the support pipes 1 arranged vertically. The long axis of the connecting pipes 2 is parallel to the horizontal direction, and the multiple connecting pipes 2 are spaced apart along the vertical direction. The two ends of each connecting pipe 2 are respectively attached to and fixedly connected to the outer circumferential surfaces of the two support pipes 1. The side of the connecting pipe 2 facing away from the support pipe 1 is the pipe body positioning surface. The pipe body positioning surfaces of the multiple connecting pipes 2 all abut against the same side of the casting mold 7, and the pipe body positioning surfaces of the multiple connecting pipes 2 cooperate to form the main positioning surface.

[0048] Preferably, there are two connecting pipes 2, which are spaced apart in the vertical direction. The two connecting pipes 2 and the two supporting pipes 1 cooperate to form a grid structure to enhance the structural support stability.

[0049] Generally, 2-5 connecting pipes are installed.

[0050] It should be noted that the working principle of the anti-deformation tooling for large flat castings in lost foam casting is as follows: the main positioning surface fits against the casting mold 7 on one side. Sand is first filled on the side of the casting mold 7 away from the main positioning surface. The sand layer squeezes the casting mold 7, and the casting mold 7 is limited by the main positioning surface. The casting mold 7 is squeezed by the sand layer and the main positioning surface to prevent the casting mold 7 from deforming.

[0051] The anti-deformation fixture for large flat castings in the lost foam casting method provided in this embodiment, compared with the prior art, utilizes support pipes 1 set in the sand box, with connecting pipes 2 installed on the same side of two support pipes 1. Multiple connecting pipes 2 together form the main positioning surface. The main positioning surface limits the casting mold 7 from one side. The worker first fills the casting mold 7 with dry sand 6 from the side away from the connecting pipe 2. After the dry sand 6 is filled, the casting mold 7 is pushed in the horizontal direction close to the connecting pipe 2. The main positioning surface and the filled dry sand 6 cooperate to horizontally position the casting mold 7. When the casting mold 7 is filled with dry sand 6 on the side close to the connecting pipe 2, the casting mold 7 will not be moved by the impact of the dry sand 6, which improves the stability of the casting mold 7, avoids the deformation of the casting mold 7, and ensures the casting quality of the cast iron flat plate.

[0052] In some embodiments, see Figure 2 The connecting pipe 2 comprises multiple horizontally connected mounting pipes 21. Two mounting pipes 21 at each end are respectively attached to and fixedly connected to the corresponding support pipe 1. The multiple mounting pipes 21 connected end-to-end form the connecting pipe 2. The modular assembly design facilitates transportation and replacement; employees can transport the pipes in sections and assemble them at designated locations, improving the convenience of transportation and assembly. The axial length of the connecting pipe 2 can be changed by adjusting the number of mounting pipes 21, facilitating the connection between the connecting pipe 2 and the support pipe 1. Replacement is convenient; if one mounting pipe 21 is damaged, the damaged mounting pipe 21 can be replaced individually, saving on operating costs.

[0053] In some embodiments, see Figure 2 and Figure 3 The connecting pipe 2 also includes multiple fasteners 22, which connect two adjacent mounting pipes 21 and make the axes of the two adjacent mounting pipes 21 overlap. The fasteners 22 can connect two mounting pipes 21 together, improve the assembly stability of the two adjacent mounting pipes 21, improve the structural strength of the connecting pipe 2, increase the stability of the main positioning surface, and stably support the casting mold 7 during the sand filling process.

[0054] In some embodiments, see Figure 3The fixing component 22 is a shaft tube, and the inner walls of both ends of the mounting tube 21 are respectively provided with internally threaded sleeves with opposite directions of rotation. Both ends of the shaft tube are respectively provided with external threads, and both ends of the shaft tube are respectively threaded into two adjacent internally threaded sleeves. The threaded assembly can increase the structural stability of the fixing component 22 and the mounting tube 21. By screwing the mounting tube 21, it can be quickly installed and removed from the fixing component 22, thus speeding up the installation efficiency.

[0055] In practice, the outer circumference of the internal threaded sleeve conforms to the inner wall of the mounting tube 21, and the outer circumference of the internal threaded sleeve is square to ensure the connection stability between the mounting tube 21 and the internal threaded sleeve.

[0056] In some embodiments, see Figure 1 Both support tubes 1 are rectangular tubes, and their opposite sides are parallel to each other. The mounting tube 21 is also rectangular, with its side surface fitting against the side surface of the support tube 1. This rectangular structure increases the contact area between the support tube 1 and the mounting tube 21, improving the structural stability of the connection. The mounting tubes 21 are installed on the same side of the support tube 1, and the sides of multiple mounting tubes 21 furthest from the support tube 1 are located on the same side, increasing the stability of the main positioning surface.

[0057] In some embodiments, see Figure 1 and Figure 2 The anti-deformation fixture for large flat castings in lost foam casting also includes a winding tape 3, which is used to bind and fix the support tube 1 and the connecting tube 2 together. The winding tape 3 can connect the support tube 1 and the connecting tube 2 together by binding, and it is easy to disassemble.

[0058] In practice, the wrapping tape 3 is an adhesive tape.

[0059] In some embodiments, see Figure 1 and Figure 2 A horizontal rod 4 is installed at the bottom of the support tube 1. The long axis of the horizontal rod 4 is perpendicular to the long axis of the support tube 1. The horizontal rod 4 is connected to the bottom of the sand box so that the axis of the support tube 1 is parallel to the vertical direction. The horizontal rod 4 and the support tube 1 are perpendicular to each other. When the horizontal rod 4 is installed at the bottom of the sand box, the axis of the support tube 1 is stably parallel to the vertical direction, increasing the stability of use.

[0060] In practice, multiple horizontal bars 4 are provided, and the multiple horizontal bars 4 are arranged radially around the axis of the support tube 1 to limit the support tube 1 from all directions.

[0061] Based on the same inventive concept, see [reference] Figures 4 to 6This application also provides a sand box for casting molds, comprising a sand box body 5, a lost foam large flat plate type casting anti-deformation fixture as described in any of the above embodiments, and dry sand 6. The top of the sand box body 5 has a pouring port; the lost foam large flat plate type casting anti-deformation fixture is disposed inside the sand box body 5, and the main positioning surface divides the sand box body 5 into a first cavity 51 and a second cavity 52 along its vertical plane. The casting mold 7 is disposed in the first cavity 51, and the main positioning surface of the casting mold anti-deformation assembly is in contact with the casting mold 7; the dry sand 6 fills the first cavity 51 and the second cavity 52, and the height of the dry sand 6 in the first cavity 51 is higher than the height of the dry sand 6 in the second cavity 52.

[0062] Compared with the prior art, the sand box for casting molds provided in this embodiment utilizes support pipes 1 set inside the sand box, with connecting pipes 2 installed on the same side of two support pipes 1. Multiple connecting pipes 2 together form the main positioning surface. The main positioning surface limits the casting mold 7 from one side. The worker first fills the casting mold 7 with dry sand 6 from the side away from the connecting pipe 2. After the dry sand 6 is filled, it pushes the casting mold 7 in a horizontal direction close to the connecting pipe 2. The main positioning surface and the filled dry sand 6 cooperate to horizontally position the casting mold 7. When the casting mold 7 is filled with dry sand 6 on the side close to the connecting pipe 2, the casting mold 7 will not be moved by the impact of the dry sand 6, improving the stability of the casting mold 7, avoiding deformation of the casting mold 7, and ensuring the casting quality of the cast iron plate. The height of the dry sand 6 in the first cavity 51 is higher than the height of the dry sand 6 in the second cavity 52. ​​The dry sand 6 in the first cavity 51 can always push the casting mold 7 to abut against the main positioning surface, ensuring that the casting mold 7 will not deform and improving the molding effect.

[0063] It should be noted that dry sand 6 is filled into the sand box body 5, see reference. Figure 5 .

[0064] In some embodiments, the sand box for casting molds further includes a pneumatic vibrator, which is disposed on the outer periphery of the sand box body 5 to vibrate the dry sand 6 in the first cavity 51 and the second cavity 52. ​​The pneumatic vibrator can vibrate the sand box body 5 to assist in the filling of the dry sand 6 and facilitate the compaction of the dry sand 6.

[0065] In practice, the pneumatic vibrator can be implemented using a three-dimensional vibration platform.

[0066] In some embodiments, the horizontal distance between the axes of the two support pipes 1 in the anti-deformation tooling for large flat castings in lost foam casting is greater than the horizontal length of the mold. The horizontal distance between the two support pipes 1 is greater than the horizontal length of the casting mold 7, so that the length of the main positioning surface exceeds the horizontal length of the casting mold 7. This allows the main positioning surface of the connecting pipe 2 to stably contact one side of the casting mold 7, increasing its stability in use.

[0067] It should be noted that the horizontal distance between the two support pipes 1 refers to the distance between the axes of the two support pipes 1.

[0068] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A deformation prevention tooling for lost foam large flat castings, which is arranged in a sand box, and is characterized in that, Comprising: Two support pipes, which are arranged in parallel in the sand box, and the support pipes are arranged vertically; And Multiple connecting pipes, the long axis of the connecting pipes is parallel to the horizontal direction, the multiple connecting pipes are arranged at intervals in the vertical direction, both ends of each connecting pipe are respectively abutted against and fixedly connected to the outer peripheral surfaces of the two support pipes, the side surface of the connecting pipe背离 the support pipe is the pipe body positioning surface, and the pipe body positioning surfaces of the multiple connecting pipes are all abutted against the same side of the casting mold, and the pipe body positioning surfaces of the multiple connecting pipes cooperate to form a main body positioning surface.

2. The anti-deformation tooling for lost foam large flat castings according to claim 1, wherein The connecting pipe includes multiple mounting pipes that are connected end to end in the horizontal direction, and the two mounting pipes located at both ends are respectively abutted against and fixedly connected to the corresponding support pipes.

3. The anti-deformation tooling for lost foam large flat castings according to claim 2, wherein The connecting pipe further includes multiple fixing members, and the fixing members connect two adjacent mounting pipes and make the axes of the two adjacent mounting pipes overlap.

4. The anti-deformation tooling for lost foam large flat castings according to claim 3, wherein The fixing member is a shaft pipe, the inner walls of both ends of the mounting pipe are respectively provided with internally threaded sleeves with opposite helix directions, the two ends of the shaft pipe are respectively provided with external threads, and the two ends of the shaft pipe are respectively in threaded fit with the two adjacent internally threaded sleeves.

5. The anti-deformation tooling for lost foam large flat castings according to claim 2, wherein Both of the two support pipes are rectangular pipes, and the opposite sides of the two support pipes are parallel to each other; The mounting pipe is a rectangular pipe, and the side surface of the mounting pipe is abutted against the side surface of the support pipe.

6. The anti-deformation tooling for lost foam large flat castings as described in claim 1, wherein The anti-deformation tooling for lost foam large flat castings further includes a winding belt, and the support pipe and the connecting pipe are bundled and fixed through the winding belt.

7. The anti-deformation tooling for lost foam large flat castings according to claim 1, wherein A horizontal rod is provided at the bottom end inside the support pipe, the long axis of the horizontal rod is perpendicular to the long axis of the support pipe, and the horizontal rod is connected to the bottom of the sand box so that the axis of the support pipe is parallel to the vertical direction.

8. A sand box for a casting mold, characterized in that Comprising: A sand box body, with a pouring port opened at the top; The anti-deformation tooling for lost foam large flat castings according to any one of claims 1-7 above, which is arranged inside the sand box body, the main body positioning surface divides the sand box body into a first cavity and a second cavity along the vertical plane where it is located, the casting mold is arranged in the first cavity, and the main body positioning surface in the anti-deformation assembly of the casting mold is abutted against the casting mold; and Dry sand, which is filled in the first cavity and the second cavity, and the height of the dry sand in the first cavity is higher than the height of the dry sand in the second cavity.

9. The sand box for a casting mold according to claim 8, wherein, The sand box for the casting mold further includes a pneumatic vibrator, and the pneumatic vibrator is arranged on the outer periphery of the sand box body to vibrate the dry sand in the first cavity and the second cavity.

10. The sand box for a casting mold according to claim 8, wherein, The horizontal distance between the axes of the two support pipes in the anti-deformation tooling for lost foam large flat castings is greater than the horizontal length of the casting mold.

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