Sand box for lost foam casting

Abstract

The utility model discloses a sand box for lost foam casting in the field of sand boxes, which comprises a sand box main body, a hydraulic cylinder is mounted in the middle of the lower surface of the sand box main body, an output rod of the hydraulic cylinder faces upwards and penetrates through the inner surface and the outer surface of the corresponding position of the bottom of the sand box main body, and a movable plate is fixed at the upper end of the output rod of the hydraulic cylinder in the sand box main body. A frame-shaped sealing gasket is fixed to the outer side of the movable plate, a matched blocking cover covers the top of the sand box body, and inclined plates are rotationally mounted at the tops of the peripheral surfaces of the sand box body, so that in the using process, an evanescent mode needing to be embedded in molding sand in the sand box body can be conveniently placed, and the use efficiency is improved. And a casting formed in the sand box main body can be conveniently taken out, so that the working efficiency of casting and processing the casting in the sand box main body can be ensured, and the sand box main body can be conveniently used.

Description

Technical Field

[0001] The utility model relates to the field of sand boxes, in particular to a sand box for lost foam casting. Background Technique

[0002] Lost foam casting, also known as full-mold casting or evaporative pattern casting, is a casting method that uses a foam plastic pattern to replace the traditional wooden or metal pattern for molding, and then pours under negative pressure to make the pattern gasify and disappear to obtain the casting. Lost foam casting is an advanced casting process and a new process with almost no machining allowance and precise forming.

[0003] Lost foam casting does not require mold removal, has no parting surface, and no sand cores. Therefore, the casting has no flash, burr, and draft angle, and reduces the dimensional error caused by the combination of sand cores. The sand box is a container used to hold molding sand and patterns during the casting process. The shape and size of the box body are determined according to the size and shape of the casting, and it is generally a cuboid or cube.

[0004] However, when the existing sand box is in use, it is not conducive to placing the lost foam patterns that need to be buried in the molding sand in the sand box, and it is not convenient to take out the castings after casting, which will affect the working efficiency of casting and processing the castings, and is not conducive to the use of the lost foam casting sand box.

[0005] Therefore, we propose a sand box for lost foam casting. Content of the Utility Model

[0006] The purpose of the utility model is to provide a sand box for lost foam casting to solve the problems raised in the above background technique.

[0007] To achieve the above purpose, the utility model provides the following technical solutions:

[0008] A sand box for lost foam casting includes a sand box main body. A hydraulic cylinder is installed in the middle of the lower surface of the sand box main body. The output rod of the hydraulic cylinder faces upward and penetrates through the inner and outer surfaces of the corresponding position at the bottom of the sand box main body. The upper end of the output rod of the hydraulic cylinder is fixed with a moving plate inside the sand box main body. A frame-shaped sealing gasket is fixed on the outside of the moving plate. The outer surface of the frame-shaped sealing gasket is in a matching and fitting state with the corresponding position on the inner surface of the sand box main body. A matching cover is provided on the top of the sand box main body. Diagonal plates are rotatably installed at the top of the four surrounding surfaces of the sand box main body. When the diagonal plates are rotated to tilt upward, the diagonal plates are in a matching and splicing state.

[0009] As a further scheme of the utility model: Both ends of the bottom of the outer surface of the diagonal plate away from the sand box main body are jointly installed with rotating hinges with the corresponding positions on the outer surface of the sand box main body. Stopper blocks are slidably installed vertically in the middle of the four surrounding surfaces of the sand box main body.

[0010] By adopting the above technical solution: the setting of the rotating hinge helps to rotatably install the inclined plate and the sand box body.

[0011] As a further solution of the present utility model: the top of the stopper is in an inclined state, and the top of the stopper is in a state of being matched and attached to the corresponding position at the bottom of the corresponding inclined plate. Fixing plates are fixed in the middle of the lower side of the peripheral surface of the sand box body.

[0012] By adopting the above technical solution: the setting of the sand box body can fix and limit the fixing plate.

[0013] As a further solution of the present utility model: the fixing plates are all in a horizontal state, and screws are threadedly inserted vertically in the middle of the fixing plates. The screws are all in a vertical state, and rotating rods are fixed on the upper end surfaces of the screws.

[0014] By adopting the above technical solution: the setting of the fixing plate can limit the screw, which is convenient for using the screw.

[0015] As a further solution of the present utility model: the outer ring surfaces of the rotating rods are rotatably connected to the middle parts of the lower ends of the corresponding stoppers through bearings, and rotating blocks are fixed on the lower end surfaces of the screws.

[0016] By adopting the above technical solution: the setting of the rotating block helps to rotate the screw.

[0017] As a further solution of the present utility model: support legs are fixed at the four corners of the lower surface of the sand box body. The support legs are all in a vertical state. Limit rods are fixed in the middle of the four weeks of the lower surface of the moving plate. The limit rods are all in a vertical state, and the limit rods all penetrate the inner surface and the outer surface of the corresponding position on the sand box body.

[0018] By adopting the above technical solution: the setting of the support legs can support and limit the sand box body.

[0019] As a further solution of the present utility model: a sealing block is fixed on the upper surface of the sand box body. The sealing block is in a frame shape, and a slot matching the sealing block is provided at the edge part of the lower surface of the cover.

[0020] By adopting the above technical solution: the setting of the sealing block can limit and seal between the sand box body and the cover.

[0021] As a further solution of the present utility model: the top of the sand box body is in an open state, the cover is in a horizontal state, and a handle is fixed in the middle of the upper surface of the cover.

[0022] By adopting the above technical solution: the setting of the handle helps to pick up and place the cover, so as to facilitate the use of the cover.

[0023] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0024] In the present utility model, the output rod of the hydraulic cylinder can drive the moving plate and the frame-shaped gasket to move in the vertical direction. The moving plate and the frame-shaped gasket can drive the molding sand and the lost foam to move in the vertical direction. When in use, it helps to place the lost foam that needs to be buried in the molding sand in the main sand box body, and can conveniently take out the castings after casting in the main sand box body, which helps to ensure the working efficiency of casting and processing the castings in the main sand box body, so as to facilitate the use of the main sand box body.

[0025] 2. In the present utility model, the frame-shaped gasket can seal between the main sand box body and the moving plate, which can prevent the molding sand from leaking. The main sand box body can limit the moving plate through the limiting rod, which helps to stably move the moving plate. When the screw moves downward, it can drive the stopper to move downward through the rotating rod. When the stopper moves downward, the blocking and supporting of the inclined plate will be cancelled, and the inclined plate will rotate downward along the main sand box body through the rotating hinge, so as to discharge the molding sand on the upper side of the inclined plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic structural view of the present utility model;

[0027] Figure 2 is a schematic structural view of the fixing plate of the present utility model;

[0028] Figure 3 is a schematic structural view of the screw of the present utility model;

[0029] Figure 4 is a schematic structural view of the stopper of the present utility model.

[0030] In the figure: 1. Main sand box body; 2. Support leg; 3. Hydraulic cylinder; 4. Moving plate; 5. Frame-shaped gasket; 6. Limiting rod; 7. Cover; 8. Sealing block; 9. Handle; 10. Inclined plate; 11. Rotating hinge; 12. Fixing plate; 13. Screw; 14. Rotating block; 15. Rotating rod; 16. Stopper. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0032] Please refer to Figures 1 to 4 In the embodiment of the present utility model, a sand box for lost foam casting includes a sand box main body 1. A hydraulic cylinder 3 is installed in the middle of the lower surface of the sand box main body 1. The output rod of the hydraulic cylinder 3 faces upward and penetrates through the inner surface and the outer surface at the corresponding position at the bottom of the sand box main body 1. A moving plate 4 is fixed at the upper end of the output rod of the hydraulic cylinder 3 inside the sand box main body 1. A frame-shaped sealing gasket 5 is fixed on the outer side of the moving plate 4. The outer surface of the frame-shaped sealing gasket 5 is in a matching and fitting state with the corresponding position on the inner surface of the sand box main body 1. A matching cover 7 is provided on the top of the sand box main body 1. Sloping plates 10 are rotatably installed at the top of the peripheral surfaces of the sand box main body 1. When the sloping plates 10 are rotated to tilt upward, the sloping plates 10 are in a matching and splicing state. The output rod of the hydraulic cylinder 3 can drive the moving plate 4 and the frame-shaped sealing gasket 5 to move in the vertical direction. The moving plate 4 and the frame-shaped sealing gasket 5 can drive the molding sand and the lost foam to move in the vertical direction. When in use, it helps to place the lost foam that needs to be buried in the molding sand in the sand box main body 1, and can conveniently take out the castings after casting in the sand box main body 1, which helps to ensure the working efficiency of casting and processing the castings in the sand box main body 1, so as to facilitate the use of the sand box main body 1.

[0033] Among them, at both ends of the bottom of the surface of the sloping plate 10 away from the sand box main body 1, a rotating hinge 11 is jointly installed with the corresponding position on the outer surface of the sand box main body 1. Blocks 16 are slidably installed vertically in the middle of the peripheral surfaces of the sand box main body 1. The rotating hinge 11 helps to rotatably install the sloping plate 10 and the sand box main body 1; the top of the block 16 is in an inclined plane state, and the top of the block 16 is in a matching and fitting state with the corresponding position at the bottom of the corresponding sloping plate 10. Fixing plates 12 are fixed in the middle of the lower sides of the peripheral surfaces of the sand box main body 1. The sand box main body 1 can fix and limit the fixing plates 12; the fixing plates 12 are all in a horizontal state, and screw rods 13 are threadedly inserted vertically in the middle of the fixing plates 12. The screw rods 13 are all in a vertical state, and rotating rods 15 are fixed on the upper end surfaces of the screw rods 13. The fixing plates 12 can limit the screw rods 13, which is convenient for using the screw rods 13.

[0034] The outer ring surfaces of the rotating rods 15 are rotatably connected to the middle of the lower ends of the corresponding blocks 16 through bearings. Rotating blocks 14 are fixed on the lower end surfaces of the screw rods 13. The rotating blocks 14 help to rotate the screw rods 13; Support legs 2 are fixed at the four corners of the lower surface of the sand box main body 1. The support legs 2 are all in a vertical state. Limit rods 6 are fixed in the middle of the four weeks of the lower surface of the moving plate 4. The limit rods 6 are all in a vertical state. The limit rods 6 penetrate through the inner surface and the outer surface at the corresponding positions of the sand box main body 1. The support legs 2 can support and limit the sand box main body 1.

[0035] A sealing block 8 is fixed on the upper surface of the sand box body 1. The sealing block 8 is in a frame shape. A matching notch is provided at the edge part of the lower surface of the cover 7 corresponding to the sealing block 8. The sealing block 8 can limit and seal between the sand box body 1 and the cover 7. The top of the sand box body 1 is in an open state. The cover 7 is in a horizontal state. A handle 9 is fixed in the middle of the upper surface of the cover 7. The handle 9 helps to take and place the cover 7, so as to facilitate the use of the cover 7.

[0036] The working principle of the present utility model is as follows: During use, the support legs 2 are stably placed at the position where they need to be used, which helps to stably use the support legs 2. The support legs 2 can support and limit the sand box body 1 and various components assembled on the sand box body 1, facilitating the stable use of the sand box body 1 and various components assembled on the sand box body 1. The sand box body 1 can support and limit the fixed plate 12 and various components assembled on the fixed plate 12, which helps to stably use the fixed plate 12 and various components assembled on the fixed plate 12.

[0037] The cover 7 is removed through the handle 9, so that the cover 7 no longer blocks the top of the sand box body 1, making the top of the sand box body 1 in an open state. Further, the hydraulic cylinder 3 on the sand box body 1 is opened. The sand box body 1 can fix and limit the hydraulic cylinder 3, facilitating the stable use of the hydraulic cylinder 3. In the open state of the hydraulic cylinder 3, the output rod of the hydraulic cylinder 3 can drive the moving plate 4 to move upward. When the moving plate 4 moves upward, it can drive the limiting rod 6 to move along the sand box body 1. The sand box body 1 can limit the moving plate 4 through the limiting rod 6, which helps to stably move the moving plate 4. When the moving plate 4 moves to the top inside the sand box body 1, molding sand is further placed on the upper side of the moving plate 4 inside the sand box body 1, and the lost foam pattern is placed on the upper side of the molding sand on the moving plate 4. Further, the hydraulic cylinder 3 drives the moving plate 4 to move downward step by step, and the molding sand is gradually filled into the outside of the lost foam pattern inside the sand box body 1 following the downward movement of the moving plate 4, so as to bury the lost foam pattern in the molding sand.

[0038] Further, pour the melted metal solution into the expendable mold. After pouring the metal solution, cover the sealing block 8 on the top of the sand box body 1 with the baffle 7 through the handle 9. The sealing block 8 can seal and position between the sand box body 1 and the baffle 7, which helps to cast and form the casting. After the casting is formed, when the casting needs to be taken out, remove the baffle 7 through the handle 9 and open the hydraulic cylinder 3 on the sand box body 1. The output rod of the hydraulic cylinder 3 can drive the moving plate 4 to move upward. When the moving plate 4 moves upward, it can drive the frame-shaped sealing gasket 5 to move upward. The frame-shaped sealing gasket 5 can seal between the sand box body 1 and the moving plate 4, and can prevent the molding sand from leaking, so that the moving plate 4 and the frame-shaped sealing gasket 5 can drive the molding sand and the formed casting to move upward.

[0039] After the moving plate 4 and the frame-shaped sealing gasket 5 move to the top inside the sand box body 1, the moving plate 4 and the frame-shaped sealing gasket 5 can push the molding sand out of the sand box body 1, causing the molding sand to be pushed to the upper side of the inclined plate 10 and exposing the casting on the upper side of the moving plate 4, so as to facilitate the removal of the casting. Further, place the subsequent expendable mold correspondingly on the upper side of the molding sand on the moving plate 4, and make the moving plate 4 move downward through the hydraulic cylinder 3. When the moving plate 4 moves downward, it will drive the expendable mold to move downward, and make the molding sand on the upper side of the inclined plate 10 gradually enter the sand box body 1, so as to facilitate the uniform burial of the expendable mold by the molding sand and help to recycle the use of the molding sand.

[0040] When the molding sand needs to be discharged, after the moving plate 4 and the frame-shaped sealing gasket 5 push the molding sand to the upper side of the inclined plate 10, further rotate the rotating block 14. When the rotating block 14 rotates, it can drive the screw rod 13 to rotate. When the screw rod 13 rotates, it will move downward along the fixedly connected fixing plate 12 with threads. When the screw rod 13 rotates, it will drive the rotating rod 15 to rotate along the block 16. When the screw rod 13 moves downward, it can drive the block 16 to move downward through the rotating rod 15. When the block 16 moves downward, it will cancel the blocking and support of the block 16 on the inclined plate 10, and the inclined plate 10 will rotate downward along the sand box body 1 through the rotating hinge 11, so as to discharge the molding sand on the upper side of the inclined plate 10.

[0041] During the use process, it helps to place the expendable mold that needs to be buried in the molding sand in the sand box body 1, can conveniently take out the casting formed in the sand box body 1, helps to ensure the working efficiency of casting and processing the casting in the sand box body 1, and is convenient for using the sand box body 1.

[0042] The above are only the preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution of the present utility model and its inventive concept, makes equivalent substitutions or changes, and should be covered within the protection scope of the present utility model.

Claims

1. A sand box for lost foam casting, comprising a sand box body (1), characterized in that: A hydraulic cylinder (3) is installed in the middle of the lower surface of the sand box body (1), the output rod of the hydraulic cylinder (3) faces upward and penetrates the inner surface and the outer surface of the corresponding position of the bottom of the sand box body (1), the upper end of the output rod of the hydraulic cylinder (3) is located in the sand box body (1), and a movable plate (4) is fixed therein, and a frame-type sealing gasket (5) is fixed to the outer side of the movable plate (4), and the outer surface of the frame-type sealing gasket (5) and the corresponding position of the inner surface of the sand box body (1) are in a matching and fitting state, the top cover of the sand box body (1) is provided with a matching baffle cover (7), and the top of the four sides of the sand box body (1) are rotatably installed with inclined plates (10), and when the inclined plates (10) are rotated to tilt upward, the inclined plates (10) are in a matching and fitting state.

2. The lost foam casting sand box according to claim 1, characterized in that: Rotating hinges (11) are installed between the two ends of the bottom of the surface of the side of the inclined plate (10) away from the sand box body (1) and the corresponding positions on the outer surface of the sand box body (1), and stoppers (16) are installed in the middle of the surrounding surfaces of the sand box body (1) in a vertically slidable manner.

3. The lost foam casting sand box according to claim 2, characterized in that: The top of the stopper (16) is in an inclined state, and the top of the stopper (16) is matched and fitted with the corresponding position of the bottom of the corresponding inclined plate (10). The middle part of the lower side of the surface of the sand box body (1) is fixed with a fixing plate (12).

4. The lost foam casting sand box according to claim 3, characterized in that: The fixing plates (12) are all in a horizontal state, a screw rod (13) is threadedly inserted in the middle of the fixing plates (12) in a vertical direction, the screw rods (13) are all in a vertical state, and a rotating rod (15) is fixed to the upper end surface of the screw rods (13).

5. The lost foam casting sand box according to claim 4, characterized in that: The outer annular surfaces of the rotating rods (15) are rotatably connected to the middle portion of the lower end of the corresponding stopper (16) via a bearing, and the lower end surface of the screw rods (13) is fixed with a rotating block (14).

6. The lost foam casting sand box according to claim 5, characterized in that: Support legs (2) are fixed at the four corners of the lower surface of the sand box body (1), and the support legs (2) are in a vertical state. Limit rods (6) are fixed in the middle of the four sides of the lower surface of the movable plate (4), and the limit rods (6) are in a vertical state. The limit rods (6) penetrate the inner surface and the outer surface of the corresponding position on the sand box body (1).

7. The lost foam casting sand box according to claim 6, characterized in that: A sealing block (8) is fixed on the upper surface of the sand box body (1), the sealing block (8) is frame-shaped, and a matching notch is provided at the edge portion of the lower surface of the retaining cover (7) corresponding to the sealing block (8).

8. The lost foam casting sand box according to claim 7, characterized in that: The top of the sand box body (1) is in an open state, the cover (7) is in a horizontal state, and a handle (9) is fixed in the middle of the upper surface of the cover (7).

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