A sand box sealing structure and a sand blowing box including this structure

Abstract

The present application discloses a sand box sealing structure, which relates to the technical field of investment precision casting. It includes a sealing cover adapted to the opening of the box body. One end of any side wall of the sealing cover in the horizontal direction close to the box body is penetrated with a wax pattern inlet and outlet. A sealing plate is arranged at the wax pattern inlet and outlet of the sealing cover in a lifting manner, and a driving member for driving the sealing plate to lift is arranged on the sealing cover; a upper baffle is arranged under the sealing plate in a lifting manner, an avoidance groove is opened on the lower end surface of the upper baffle, and a power member for driving the upper baffle to lift is arranged on the sealing plate. The present application has the effects of reducing the sand being blown out of the box body, improving the cleanliness of the workshop and saving sand materials.

Description

Technical Field

[0001] This application relates to the technical field of investment casting, and particularly relates to a sand box sealing structure and a sand blowing box including this structure. Background Art

[0002] The lost wax casting method, also known as investment casting, is a precision casting method for metal objects. Wax is used to make the pattern of the mold to be formed. Then, high-temperature refractory slurry is poured onto the surface of the wax pattern, and fine sand is scattered on the surface of the slurry. This process is repeated several times to form a complete mold shell. After drying, it is baked at high temperature to make the wax flow out, forming a mold shell. Then, the molten metal is poured into the mold shell. After cooling and hardening, the shell is removed and polished to obtain the required metal product.

[0003] In the related industry, a sand blowing machine includes a box body with an opening on the upper side. An air inlet nozzle is communicated and opened on the lower side of the box body. The air inlet nozzle is communicated with an external air blowing device through an air inlet pipe. A double-layer steel wire mesh is horizontally and fixedly laid in the box body, and sand is placed in the box body above the wire mesh. At the same time, referring to Figure 1 , the wax pattern includes a wax pattern body 100 and a wax pattern clamping part 200. The wax pattern clamping part 200 is usually a cylindrical strip structure. When it is necessary to wrap sand on the surface of the wax pattern, the staff starts the air blowing device. The air blowing device blows air to the lower side of the wire mesh in the box body through the air inlet pipe, so that the sand in the box body is blown up by the air from bottom to top. Then, a manipulator is used to clamp the wax pattern clamping part 200 dipped with slurry, and the wax pattern body 100 is extended from the upper opening of the sand blowing box into the sand blowing box. Subsequently, the wax pattern body 100 is rotated so that the sand is evenly attached to the slurry, thereby completing the sand sticking operation of the wax pattern.

[0004] Regarding the above related technology, the inventor believes that when sticking sand on the wax pattern, the air blowing device is likely to blow the sand out of the box body, resulting in an unguaranteed sanitary environment in the workshop, and there are areas for improvement. Summary of the Invention

[0005] In order to improve the problem that sand is likely to leak out of the sand blowing box during the sand sticking process of the wax pattern and improve the sanitary environment of the workshop, this application provides a sand box sealing structure and a sand blowing box including this structure.

[0006] In a first aspect, a sand box sealing structure provided by this application adopts the following technical solution:

[0007] A sand box sealing structure includes a sealing cover adapted to the opening of the box body. One end of any side wall of the sealing cover close to the box body is penetrated and provided with a wax pattern inlet and outlet. A sealing plate is covered at the wax pattern inlet and outlet of the sealing cover. The sealing plate is arranged to move up and down. A driving member for driving the sealing plate to move up and down is arranged on the sealing cover.

[0008] By adopting the above technical solution, when performing the wax mold sticking sand operation, the robot clamps the wax mold clamping part and extends the wax mold body into the box from the wax mold inlet and outlet; then, the driving part drives the sealing plate to move downward, thereby reducing the size of the wax mold inlet and outlet, thereby reducing the occurrence of sand being blown out of the box after the blowing device is started, thereby effectively reducing the waste of sand and effectively improving the cleanliness of the workshop.

[0009] Preferably, the lower end surface of the sealing plate is provided with an avoidance groove for avoiding the wax pattern clamping part.

[0010] By adopting the above technical solution, in actual use, the manipulator clamps the end of the wax mold clamping part that is away from the wax mold body and extends the wax mold body into the box body; after the sealing plate is lowered to completely cover the wax mold inlet and outlet, the wax mold clamping part is embedded in the avoidance groove; when the manipulator rotates the wax mold, the outer circular surface of the wax mold clamping part slides relative to the inner wall of the avoidance groove; the avoidance groove is used to avoid the wax mold clamping part, further reducing the gap between the sealing cover and the box opening after the sealing cover covers the box opening, thereby helping to further reduce the occurrence of sand being blown out of the box.

[0011] Preferably, an upper baffle is provided on the lower side of the sealing plate for lifting, the avoidance groove is opened on the lower end surface of the upper baffle, and a power part for driving the upper baffle to lift is provided on the sealing plate.

[0012] By adopting the above technical solution, the avoidance groove is opened on the upper baffle. In actual use, the staff selects an upper baffle with an avoidance groove of appropriate size according to the different sizes of the wax molds to be sand-bonded, and installs it on the sealing plate to carry out the corresponding wax mold sand-bonding operation; so that the same sealing box can meet the sand-bonding operation requirements of wax molds of different sizes, which helps to improve the applicability of the sand box sealing structure.

[0013] Preferably, guide rods are provided on both sides of the sealing plate in the direction of movement of the baffle, and the length direction of any guide rod is parallel to the movement direction of the upper baffle; the side walls of the baffle corresponding to the corresponding guide rods are formed with sliders, and any guide rod passes through the slider and slides with the corresponding slider along its own length direction.

[0014] By adopting the above technical solution, the lifting and lowering movement of the upper baffle is guided by the sliding cooperation of the guide rod and the corresponding slider, which helps to improve the stability of the sliding movement of the upper baffle, thereby improving the accuracy of the wax pattern clamping part embedded in the avoidance groove.

[0015] Preferably, a transparent window is provided on the horizontal side panel of the sealing cover.

[0016] By adopting the above technical solution, a transparent window is opened on the side plate in the horizontal direction of the sealing cover, which is convenient for the staff to monitor the progress of the wax pattern sand sticking operation in the box in real time, so as to adjust the wax pattern sand sticking operation in time.

[0017] In a second aspect, the present application provides a sand brushing box including a sand box sealing structure, and the following technical solution is adopted:

[0018] A sand brushing box including a sand box sealing structure includes a sand brushing box body. A lower retaining piece is provided on the side wall of the sand brushing box body corresponding to the sealing plate in the horizontal direction. The lower retaining piece and the upper retaining piece are arranged correspondingly. A limiting groove is opened corresponding to the avoidance groove at the upper end of the lower retaining piece.

[0019] By adopting the above technical solution, during actual use, the staff first inserts the clamping part of the wax mold into the limiting groove. Then, the power member drives the upper retaining piece to descend, so that the upper retaining piece abuts against the upper surface of the wax pattern clamping part, and finally the wax pattern clamping part is clamped between the limiting groove and the avoidance groove; by opening the limiting groove, it is convenient for the staff to position the wax pattern clamping part between the box body and the sealing cover, thereby improving the accuracy of embedding the wax pattern clamping part into the avoidance groove.

[0020] Preferably, a guiding groove is opened on the sand brushing box body corresponding to the limiting groove. The length direction of the guiding groove is parallel to the movement direction of the upper retaining piece; the lower retaining piece is arranged to move up and down, and the movement direction of the lower retaining piece is collinear with the movement direction of the upper retaining piece. The side of the lower retaining piece close to the sand brushing box body is slidably matched with the side wall of the sand brushing box; an elastic member for driving the lower retaining piece to rise is provided on the sand brushing box body.

[0021] By adopting the above technical solution, after the wax pattern clamping part is placed in the limiting groove, the driving member drives the sealing plate to descend until the inner walls of the avoidance groove and the limiting groove clamp the wax pattern clamping part; then, the power member drives the upper retaining piece to descend. While the upper retaining piece descends, it drives the lower retaining piece to slide downward along the same straight line. The lower retaining piece compresses the elastic member, and the wax pattern clamping part slides along the inner wall of the guiding groove at the same time until the wax mold contacts the sand floating up and down in the box body; subsequently, the manipulator rotates the wax pattern clamping part, so that the wax mold in the box body rotates synchronously, so that the surface of the wax mold is evenly wrapped with the corresponding sand, thereby completing the wax pattern sand sticking operation; then, the power member drives the upper retaining piece to rise, the upper retaining piece falls off the lower retaining piece, and the elastic member recovers deformation and releases elasticity, thereby pushing the lower retaining piece to move upward and reset; by pushing the lower retaining piece to descend synchronously by the upper retaining piece, it is convenient for the wax mold to extend into the box body under the condition that the sealing cover and the box body are sealed, effectively improving the convenience of sticking sand on the wax mold.

[0022] Preferably, sliding rods are arranged on both sides of the sand brushing box body in the width direction of the lower baffle. The length direction of any one of the sliding rods is parallel to the movement direction of the lower baffle. A clamping block is formed on the side wall of the lower baffle corresponding to any one of the guiding rods. Any one of the guiding rods penetrates through the corresponding clamping block along its own length direction and is in sliding fit with the corresponding clamping block.

[0023] By adopting the above technical solution, the lower baffle is installed on the sand brushing box body by means of the sliding fit between the sliding rod and the corresponding clamping block. The installation structure is simple and convenient for manufacturing the sand brushing box. At the same time, the sliding rod is used to guide the lifting movement of the lower baffle, which helps to improve the smoothness of the sliding movement of the lower baffle, and thus reduces the occurrence of the lower baffle being stuck.

[0024] Preferably, the elastic member includes a spring coaxially sleeved on any one of the sliding rods, and the spring is located below any one of the clamping blocks.

[0025] By adopting the above technical solution, during actual operation, when the upper baffle descends, it pushes the lower baffle to move downward synchronously. When the lower baffle moves, it compresses the spring. After the wax pattern sand sticking operation is completed, the power member drives the upper baffle to move upward, so that the upper baffle falls off the lower baffle. At the same time, the spring restores its deformation and releases elasticity, thereby pushing the lower baffle to move upward until it returns to its original position. Using the spring to drive the lower baffle to rise, the driving structure is simple and helps to save the production cost of the enterprise.

[0026] In summary, the present application includes at least one of the following beneficial technical effects:

[0027] By covering the opening of the box body with a sealing cover and opening a wax pattern inlet and outlet on the lower side of the sealing cover, the wax pattern extends into the box body from the wax pattern inlet and outlet. By movably arranging a sealing plate at the wax pattern inlet and outlet to cover the wax pattern inlet and outlet. At the same time, an upper baffle is arranged under the sealing plate, and an avoidance groove is opened on the lower end surface of the upper baffle, so that the sealing between the sealing cover and the box body is as good as possible, effectively reducing the situation of sand being blown out of the box body, reducing the waste of sand, and at the same time effectively improving the cleanliness of the working workshop;

[0028] By providing a transparent window on the sealing cover, it helps to improve the convenience for the staff to monitor the real-time status of the wax pattern sand sticking operation in the box body, so as to facilitate the staff to timely adjust the placement state of the wax pattern and the corresponding equipment, and helps to ensure the normal progress of the wax pattern sand sticking operation;

[0029] By using the lower baffle slidably arranged on the sand brushing box and the spring sleeved on the sliding rod, in cooperation with the sealing cover, it effectively improves the convenience for the wax pattern to extend into the corresponding sand sticking station in the sand brushing box. At the same time, the overall structure of the sand brushing box is simple, which helps to save the production cost of the enterprise. Description of the Drawings

[0030] Figure 1It is an axonometric schematic diagram mainly showing the overall structure of the wax pattern in the related art.

[0031] Figure 2 It is an axonometric schematic diagram mainly showing the overall structure of the sand box sealing structure in the embodiment of the present application.

[0032] Figure 3 It is Figure 2 An enlarged view of part A in , mainly used to show the opening position of the avoidance groove.

[0033] Figure 4 It is an axonometric schematic diagram mainly showing the overall structure of the sand blowing box body in the embodiment of the present application.

[0034] Figure 5 It is Figure 4 An enlarged view of part B in , mainly used to show the opening position of the limiting groove.

[0035] Reference numerals: 1, sealing cover; 11, wax pattern inlet and outlet; 12, guide rod; 13, transparent window; 2, sealing plate; 21, upper baffle; 211, avoidance groove; 212, connecting piece; 213, slider; 22, guide block; 23, mounting plate; 231, guide rod; 3, driving member; 31, driving cylinder; 4, power member; 41, power cylinder; 5, sand blowing box body; 51, plugging plate; 511, guiding groove; 52, mounting groove; 53, sliding rod; 6, lower baffle; 61, limiting groove; 62, clamping block; 7, elastic member; 71, spring; 100, wax pattern body; 200, wax pattern clamping part. Detailed implementation manners

[0036] The following will Figure 2-5 be further described in detail with reference to the attached

[0037] The embodiment of the present application discloses a sand box sealing structure.

[0038] Referring to Figure 2 and Figure 3 , a sand box sealing structure includes a sealing cover 1 for covering the opening of the box body. One end of any side wall of the sealing cover 1 in the horizontal direction close to the box body is provided with a wax pattern inlet and outlet 11. A sealing plate 2 is arranged to lift and lower at the wax pattern inlet and outlet 11 of the sealing cover 1, and a driving member 3 for driving the lifting and lowering of the sealing plate 2 is arranged on the sealing cover 1; a plurality of upper baffles 21 are arranged at intervals along the horizontal direction on the lower side of the sealing plate 2, and any one of the upper baffles 21 is arranged to lift and lower, and the moving direction of any one of the upper baffles 21 is parallel to the moving direction of the sealing plate 2. A power member 4 for driving the corresponding upper baffle 21 to lift and lower is arranged on the sealing plate 2 corresponding to any one of the upper baffles 21; moreover, an avoidance groove 211 for avoiding the wax pattern clamping part 200 is opened on the lower end surface of any one of the upper baffles 21.

[0039] When actually performing the operation of sticking sand on the wax pattern, the manipulator clamps the wax pattern clamping part 200 and inserts the wax pattern body 100 into the box body from the wax pattern inlet and outlet 11; then, the wax pattern clamping part 200 is placed at a position corresponding to any avoidance groove 211 on the edge of the opening of the box body; after that, the driving member 3 drives the sealing plate 2 to descend to cover the wax pattern inlet and outlet 11, and the power member 4 simultaneously drives the corresponding upper baffle 21 to descend until the wax pattern clamping part 200 is embedded in the avoidance groove 211, so as to realize the sealing of the opening of the box body; subsequently, the staff starts the air blowing device, and the air blowing device blows up the sand on the upper side of the double-layer steel wire screen of the box body through the air inlet pipe; then, the manipulator rotates the wax pattern clamping part 200, and the wax pattern clamping part 200 drives the wax pattern body 100 to rotate, so that the sand is evenly wrapped on the surface of the wax pattern body 100.

[0040] Specifically, the driving member 3 includes a driving cylinder 31. The cylinder body of the driving cylinder 31 is fixed on the sealing cover 1 on the upper side of the sealing plate 2. The telescopic direction of the piston rod of the driving cylinder 31 is parallel to the movement direction of the sealing plate 2, and the end of the piston rod of the driving cylinder 31 is hinged to the middle position of the sealing plate 2; the sealing plate 2 is rectangularly arranged, and guide rods 12 are installed at the edges of the sealing cover 1 on both sides of the horizontal direction of the sealing plate 2. The sealing plate 2 is provided with guide blocks 22 corresponding to the guide rods 12. Any one of the guide rods 12 penetrates through the guide block 22 along its own length direction and is slidably matched with the guide block 22; on the one hand, the guide rod 12 is used to ensure the firm installation of the sealing plate 2 on the sealing cover 1; on the other hand, it is used to guide the movement direction of the sealing plate 2, so as to improve the stability of the driving cylinder 31 driving the sealing plate 2 to move.

[0041] In this embodiment of the present application, two upper baffles 21 are spaced apart on the sealing plate 2; mounting plates 23 are provided on the sealing plate 2 corresponding to any one of the upper baffles 21, and the corresponding upper baffles 21 are all mounted on the side of the mounting plate 23 facing away from the sealing plate 2, and any one of the mounting plates 23 is fixedly connected to the sealing plate 2 by bolts; when the size of the wax pattern to be coated with sand changes, the staff screws the corresponding bolts to remove the mounting plate 23 and the baffle mounted thereon from the sealing plate 2, and replace the mounting plate 23 with a suitable size avoidance groove 211 to meet the sand coating requirements of wax patterns of different sizes. At the same time, the power member 4 includes a power cylinder 41 mounted on the sealing plate 2 above the corresponding upper baffle 21. The cylinder body of any one of the power cylinders 41 is fixedly connected to the sealing plate 2. The telescopic direction of the piston rod of any one of the power cylinders 41 is parallel to the movement direction of the upper baffle 21, and the end of the piston rod of any one of the power cylinders 41 is fixedly connected corresponding to the upper baffle 21; at the same time, to ensure the stability of the lifting movement of the upper baffle 21, guide rods 231 are provided on the mounting plates 23 on both sides of the upper baffle 21 in its movement direction. The length direction of any one of the guide rods 231 is parallel to the movement direction of the upper baffle 21; a connecting piece 212 is fixed on the upper side of the upper baffle 21. Sliders 213 are formed on the edge of the connecting piece 212 corresponding to any one of the guide rods 231. Any one of the guide rods 231 penetrates through the corresponding slider 213 along its length direction and is slidably matched with the corresponding slider .

[0042] Moreover, to facilitate the staff to observe the actual state of the wax pattern sand coating operation in the box in real time, in this embodiment of the present application, transparent windows 13 are opened on both side plates of the sealing cover 1 adjacent to the side plate with the sealing plate 2 in the horizontal direction.

[0043] Refer to Figure 4 and Figure 5 In addition, referring to and , this embodiment of the present application also discloses a sand brushing box including a sand box sealing structure, which includes a sand brushing box body 5. The sealing cover 1 is fixedly covered at the opening of the sand brushing box body 5. A lower baffle 6 is arranged in a lifting manner on the side wall of the sand brushing box body 5 corresponding to the sealing plate 2 in the horizontal direction. The lower baffle 6 is arranged corresponding to the upper baffle 21, and the movement direction of the lower baffle 6 is collinear with the movement direction of the upper baffle 21. A limiting groove 61 is opened on the upper end surface of the lower baffle 6 corresponding to the avoidance groove 211; a guiding groove 511 is opened on the sand brushing box body 5 corresponding to the limiting groove 61, and the length direction of the guiding groove 511 is parallel to the movement direction of the upper baffle 21.

[0044] During actual use, the manipulator grips one end of the wax pattern clamping part 200 that faces away from the wax pattern body 100, and inserts the wax pattern body 100 into the sand blowing box body 5 through the wax pattern inlet / outlet 11 on the sealing cover 1. At the same time, the wax pattern clamping part 200 is embedded in the limiting groove 61. Then, the driving cylinder 31 drives the sealing plate 2 to descend and cover the wax pattern inlet / outlet 11. The power cylinder 41 is started, driving the upper sealing plate 2 to descend, so that the inner walls of the avoidance groove 211 and the limiting groove 61 are pressed against the wax pattern clamping part 200. After that, the piston rod of the power cylinder 41 continues to extend, pushing the lower baffle 6 to move downward along the same straight line, and at the same time making the wax pattern clamping part 200 slide along the inner wall of the guiding groove 511. At the same time, the upper baffle 21 seals the upper end of the guiding groove 511 located in the avoidance groove 211, and the lower baffle 6 seals the lower end of the limiting groove 61 located in the avoidance groove 211, so as to maintain the sealing of the sand blowing box body 5.

[0045] Specifically, referring to Figure 5 , an installation groove 52 is formed in the sand blowing box body 5 at a position corresponding to the lower baffle in the horizontal direction. A sealing plate 51 is fixedly covered in the sand blowing box body 5 corresponding to the installation groove 52, and the guiding groove 511 is formed on the sealing plate 51. The lower baffle 6 is arranged in the installation groove 52. Slide rods 53 are arranged on both sides of the lower baffle 6 in the moving direction in the installation groove 52. The length direction of any one of the slide rods 53 is parallel to the moving direction of the lower baffle 6. A clamping block 62 is formed on the side wall of the lower baffle 6 corresponding to any one of the slide rods 53. Any one of the slide rods 53 penetrates through the corresponding clamping block 62 along its own length direction and is in sliding fit with the corresponding clamping block 62.

[0046] At the same time, to facilitate the reset of the lower baffle 6, an elastic member 7 is arranged at a position of any one of the slide rods 53 below the corresponding clamping block 62. In this embodiment of the present application, the elastic member 7 includes a spring 71 coaxially sleeved on any one of the slide rods 53.

[0047] When the upper baffle 21 pushes the lower baffle 6 to move downward, the clamping blocks 62 on the lower baffle 6 all slide relative to the slide rods 53 along the length direction of the slide rods 53. At the same time, the lower baffle 6 presses the corresponding spring 71. After the wax pattern is sanded, the upper baffle 21 rises and disengages from the lower baffle 6. The lower baffle 6 no longer applies pressure to the spring 71. The spring 71 recovers its deformation and releases its elasticity, thereby pushing the lower baffle 6 to move upward to realize the reset of the lower baffle 6.

[0048] The implementation principle of a sanding box with a sand box sealing structure in an embodiment of this application is as follows: When performing the operation of sticking sand on the wax pattern, the manipulator clamps the wax pattern clamping part 200, inserts the wax pattern body 100 into the box body through the wax pattern inlet and outlet 11, and the wax pattern clamping part 200 is placed on the limiting groove 61; then, the piston rod of the driving cylinder 31 extends, driving the sealing plate 2 to move downward to cover the wax pattern inlet and outlet 11; at the same time, the piston rod of the power cylinder 41 also extends, driving the upper retaining piece 21 to descend, so that the avoidance groove 211 is engaged with the limiting groove 61 to clamp the wax pattern clamping part 200; after that, the piston rod of the power cylinder 41 continues to extend, the upper retaining piece 21 pushes the lower retaining piece 6 downward, and the lower retaining piece 6 squeezes the spring 71, so that the wax pattern clamping part 200 slides relative to the inner wall of the guiding groove 511 until the wax pattern body 100 contacts the sand in the sanding box body 5; subsequently, the manipulator rotates the wax pattern clamping part 200, and the wax pattern clamping part 200 drives the wax pattern body 100 to rotate, so that the sand uniformly wraps around the surface of the wax pattern body 100.

[0049] After the operation of sticking sand on the wax pattern is completed, the piston rod of the power cylinder 41 contracts, driving the upper retaining piece 21 to rise, so that the upper retaining piece 21 disengages from the lower retaining piece 6, and the lower retaining piece 6 no longer applies pressure to the spring 71. The spring 71 restores deformation and releases elasticity, thereby pushing the lower retaining piece 6 upward to achieve the reset of the lower retaining piece 6; then, the driving cylinder 31 drives the sealing plate 2 to rise, the wax pattern inlet and outlet 11 is opened, and the manipulator drives the wax pattern body 100 to be taken out of the sanding box body 5, thus completing the operation of sticking sand on the wax pattern.

[0050] By adopting this method, the opening of the sanding box body 5 is covered by the sealing cover 1, effectively reducing the occurrence of sand being blown out of the sanding box body 5, saving sand materials, and effectively ensuring the cleanliness of the working workshop.

[0051] The above are all the preferred embodiments of this application, and the protection scope of this application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A sand box sealing structure, characterized in that: It includes a sealing cover (1) adapted to the opening of the box body. One end of any side wall of the sealing cover (1) in the horizontal direction close to the box body is provided with a wax pattern inlet and outlet (11). A sealing plate (2) is sleeved at the wax pattern inlet and outlet (11) of the sealing cover (1), and the sealing plate (2) is arranged to move up and down; a driving member (3) for driving the sealing plate (2) to move up and down is arranged on the sealing cover (1); A relief groove (211) for avoiding the wax pattern clamping part (200) is formed on the lower end surface of the sealing plate (2); an upper baffle (21) is arranged to move up and down on the lower side of the sealing plate (2), and the relief groove (211) is formed on the lower end surface of the upper baffle (21). A power member (4) for driving the upper baffle (21) to move up and down is arranged on the sealing plate (2); Guide rods (231) are arranged on both sides of the sealing plate (2) in the moving direction of the upper baffle (21). The length direction of any one of the guide rods (231) is parallel to the moving direction of the upper baffle (21); sliding blocks (213) are arranged on the side walls of the upper baffle (21) corresponding to the corresponding guide rods (231), and any one of the guide rods (231) passes through the sliding blocks (213) and is slidably matched with the corresponding sliding blocks (213) along its own length direction; a transparent window (13) is formed on the side plate of the sealing cover (1) in the horizontal direction.

2. A sand-scraping box comprising a sand box sealing structure, characterized in that: It includes the sand box sealing structure as described in claim 1, and further includes a sand blowing box body (5). A lower baffle (6) is arranged on the side wall of the sand blowing box body (5) in the horizontal direction corresponding to the sealing plate (2). The lower baffle (6) is arranged corresponding to the upper baffle (21), and a limiting groove (61) is formed at the upper end of the lower baffle (6) corresponding to the relief groove (211).

3. A sand fettling box comprising a sand box sealing structure according to claim 2, characterized in that: A guiding groove (511) is formed on the sand blowing box body (5) corresponding to the limiting groove (61). The length direction of the guiding groove (511) is parallel to the moving direction of the upper baffle (21); the lower baffle (6) is arranged to move up and down, and the moving direction of the lower baffle (6) is collinear with the moving direction of the upper baffle (21). The side of the lower baffle (6) close to the sand blowing box body (5) is slidably matched with the side wall of the sand blowing box body (5); an elastic member (7) for driving the lower baffle (6) to rise is arranged on the sand blowing box body (5).

4. A sand-sweeping box including a sand box sealing structure according to claim 3, characterized in that: Slide rods (53) are arranged on both sides of the sand blowing box body (5) in the width direction of the lower baffle (6). The length direction of any one of the slide rods (53) is parallel to the moving direction of the lower baffle (6). A clamping block (62) is formed on the side wall of the lower baffle (6) corresponding to any one of the slide rods (53). Any one of the slide rods (53) passes through the corresponding clamping block (62) along its own length direction and is slidably matched with the corresponding clamping block (62).

5. A sand-sweeping box comprising a sand box sealing structure according to claim 4, characterized in that: The elastic member (7) includes a spring (71) coaxially sleeved on any one of the slide rods (53), and the spring (71) is located below any one of the clamping blocks (62).

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