Sand box device for negative pressure casting

Abstract

The utility model provides a sand box device for negative pressure casting, which comprises a supporting bottom plate, a sand box body is arranged right above the supporting bottom plate, an auxiliary shaft is rotatably connected to the middle of the top of the supporting bottom plate, a half gear is arranged in the middle of the outer wall of the auxiliary shaft, and the half gear is meshed with a rack. The sand box is reasonable in design, air in the sand box body can be evenly adsorbed through the air bins arranged on the four sides of the inner wall of the sand box body, the air holes are formed between the air bins and the sand box body so that air can be discharged through the air bins, and dry sand in the sand box can be blocked through the blocking structures so that the dry sand can be prevented from being sucked out along with the sand box.

Description

Technical Field

[0001] The utility model mainly relates to the field of negative pressure casting, in particular to a sand box device for negative pressure casting. Background Art

[0002] Negative pressure casting is also called V-method casting. It uses plastic film to seal the sand box and uses a vacuum exhaust system to extract the air in the mold. There is a pressure difference between the inside and outside of the mold, which makes the dry sand dense and forms the required cavity. After core setting, box closing, pouring and vacuuming, the casting solidifies and the negative pressure is released, the molding sand collapses to obtain the casting.

[0003] The inventor discovered the following defects during the operation of the specific embodiment:

[0004] However, when the number of exhaust holes in the sand box is small, the speed at which the vacuum exhaust system extracts air from the sand box decreases, and when the sand blocks the exhaust holes, the amount of extracted gas will also be reduced, reducing the speed at which the sand box casts parts.

[0005] It should be noted that the above contents belong to the technical cognition scope of the inventor. Since the technical contents in this field are vast and too complicated, the above contents of this application do not necessarily constitute prior art. Utility Model Content

[0006] 1. Technical problems to be solved by the utility model:

[0007] The utility model provides a sand box device for negative pressure casting, which is used to solve the technical problems existing in the above-mentioned background technology.

[0008] 2. Technical solution:

[0009] To achieve the above-mentioned purpose, the technical solution provided by the utility model is as follows: a sand box device for negative pressure casting, comprising a sand box body, wherein four sides of the interior of the sand box body are provided with air bins, the inner side of the air bins is provided with air holes, the outer wall of the air bins is provided with a blocking structure, and the bottom of the supporting bottom plate is provided with a rack;

[0010] A supporting bottom plate is provided with a sand box body directly above the supporting bottom plate, an auxiliary shaft is rotatably connected in the middle of the top of the supporting bottom plate, a half gear is provided in the middle of the outer wall of the auxiliary shaft, and the half gear is meshed with a rack.

[0011] Furthermore, mounting rods are arranged on both sides of the top of the supporting base plate, and vibration springs are arranged at both ends of the mounting rods.

[0012] Furthermore, brackets are provided on both sides of the bottom of the sand box body, a sliding hole is opened at one end of the bracket, the sliding hole is slidably connected to the mounting rod, and one end of the vibration spring is connected to the bracket.

[0013] Furthermore, side rods are provided on both sides of the top of the sand box body, the side rod on one side of the supporting bottom plate is internally rotatably connected to a first rotating shaft, a driving motor is provided on one side of the first rotating shaft, the driving motor is connected to the side rods, and a second rotating shaft is provided inside the side rod on the other side of the supporting bottom plate.

[0014] Furthermore, the second rotating shaft is rotatably connected to the side rod, and a planar spiral spring is arranged between the second rotating shaft and the side rod.

[0015] Furthermore, the blocking structure includes a fixing plate, the inner side of which is in contact with the outer wall of the air chamber, and a blocking tube is provided inside the fixing plate, the outer wall of which is in contact with the inner wall of the air vent.

[0016] 3. Beneficial effects:

[0017] Compared with the prior art, the technical solution provided by the utility model has the following beneficial effects:

[0018] The utility model can evenly absorb the air in the sand box body through the air bins arranged on the four sides of the inner wall of the sand box body, and air holes are opened between the air bins and the sand box body so that the gas can be discharged through the air bins, and the blocking structure can block the dry sand in the sand box to prevent the dry sand from being sucked out;

[0019] The top of the sand box body needs to be covered with a plastic film. The drive motor is started, and the drive motor drives the plastic film wrapped around the outer wall of the second rotating shaft to fit the top of the sand box body. Then the air inside the sand box body is extracted so that the plastic film can be adsorbed on the inner wall of the sand box. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0021] Figure 2 It is a three-dimensional cross-sectional structural schematic diagram of the utility model;

[0022] Figure 3 This is a schematic diagram of the three-dimensional structure of the sand box body of the utility model;

[0023] Figure 4 This is a schematic diagram of the three-dimensional structure of the support base plate of the utility model;

[0024] Figure 5 It is a schematic diagram of the three-dimensional structure of the barrier structure of the present utility model.

[0025] Reference numerals:

[0026] 1. Support base plate; 2. Auxiliary shaft; 3. Half gear; 4. Mounting rod; 5. Vibration spring; 6. Sand box body; 7. Bracket; 8. Sliding hole; 9. Rack; 10. Side rod; 11. First rotating axis; 12. Driving motor; 13. Second rotating axis; 14. Planar volute spring; 15. Air vent; 16. Blocking structure; 1601. Fixed plate; 1602. Blocking tube; 17. Air chamber. DETAILED DESCRIPTION

[0027] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "page", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0030] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed", "provided with", "provided on" and the like should be understood in a broad sense, for example, it 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 an indirect connection 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 the present invention can be understood according to specific circumstances. Example

[0031] Refer to the attached Figure 1-5A negative pressure casting sand box device comprises a sand box body 6, wherein the four sides of the sand box body 6 are provided with air chambers 17, the inner side of the air chamber 17 is provided with air holes 15, the outer wall of the air chamber 17 is provided with a blocking structure 16, and the bottom of the supporting bottom plate 1 is provided with a rack 9;

[0032] A support base plate 1 is provided with a sand box body 6 directly above the support base plate 1. An auxiliary shaft 2 is rotatably connected in the middle of the top of the support base plate 1. A half gear 3 is provided in the middle of the outer wall of the auxiliary shaft 2. The half gear 3 is meshed with a rack 9.

[0033] Furthermore, mounting rods 4 are provided on both sides of the top of the supporting base plate 1, and vibration springs 5 ​​are provided at both ends of the mounting rods 4. Brackets 7 are provided on both sides of the bottom of the sand box body 6, and a sliding hole 8 is opened at one end of the bracket 7. The sliding hole 8 is slidably connected to the mounting rod 4, and one end of the vibration spring 5 is connected to the bracket 7. The motor is started, and the motor drives the half gear 3 to rotate through the auxiliary shaft 2, so that the half gear 3 drives the sand box body 6 to move through the rack 9 at the bottom of the sand box body 6, so that the sand box body 6 slides on the top of the mounting rod 4 to squeeze the vibration spring 5, so that the dry sand inside the sand box body 6 can be squeezed against each other, and the air inside the sand box body 6 is quickly discharged.

[0034] Furthermore, side rods 10 are provided on both sides of the top of the sand box body 6, and the side rod 10 on one side of the supporting base plate 1 is internally rotatably connected with a first rotating shaft 11, and a driving motor 12 is provided on one side of the first rotating shaft 11, and the driving motor 12 is connected to the side rod 10, and a second rotating shaft 13 is provided inside the side rod 10 on the other side of the supporting base plate 1, and the second rotating shaft 13 is rotatably connected to the side rod 10, and a planar volute spring 14 is provided between the second rotating shaft 13 and the side rod 10, and a plastic film is provided on the outer wall of the second rotating shaft 13 and the other end is connected to the first rotating shaft 11, and the driving motor 12 is started, and the driving motor 12 drives the unused plastic film to fit with the top of the sand box body 6, thereby realizing automatic adsorption of the plastic film on the top of the sand box body 6.

[0035] Furthermore, the blocking structure 16 includes a fixing plate 1601, the inner side of which is in contact with the outer wall of the air chamber 17, and a blocking tube 1602 is provided inside the fixing plate 1601, and the outer wall of the blocking tube 1602 is in contact with the inner wall of the air vent 15.

[0036] In this embodiment, when it is necessary to produce a part by negative pressure casting, dry sand is put into the interior of the sand box body 6 and molded into the shape of the part, and then the drive motor 12 is started, the drive motor 12 drives the first rotating shaft 11 to rotate, and the plastic film on the outer wall of the first rotating shaft 11 covers the top of the sand box body 6;

[0037] Then start the air pump to extract the air inside the sand box body 6, so that the air inside the sand box body 6 enters the inside of the air warehouse 17 through the blocking pipe 1602 and is discharged, so that the plastic film covers the inside of the dry sand inside the sand box body 6.

[0038] The above-described embodiments only express a certain implementation method of the utility model, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the patent of the utility model shall be based on the attached claims.

Claims

1. A sand box device for negative pressure casting, characterized in that: include A sand box body (6), wherein four sides of the interior of the sand box body (6) are provided with air chambers (17), the inner side of the air chamber (17) is provided with air holes (15), the outer wall of the air chamber (17) is provided with a blocking structure (16), and a rack (9) is provided at the bottom of the supporting bottom plate (1); A supporting bottom plate (1) is provided with a sand box body (6) directly above the supporting bottom plate (1); an auxiliary shaft (2) is rotatably connected in the middle of the top of the supporting bottom plate (1); a half gear (3) is provided in the middle of the outer wall of the auxiliary shaft (2); and the half gear (3) is meshed with a rack (9).

2. A sand box device for negative pressure casting according to claim 1, characterized in that: Mounting rods (4) are arranged on both sides of the top of the supporting base plate (1), and vibration springs (5) are arranged at both ends of the mounting rods (4).

3. A sand box device for negative pressure casting according to claim 2, characterized in that: Brackets (7) are arranged on both sides of the bottom of the sand box body (6), one end of the bracket (7) is provided with a sliding hole (8), the sliding hole (8) is slidably connected to the mounting rod (4), and one end of the vibration spring (5) is connected to the bracket (7).

4. A sand box device for negative pressure casting according to claim 1, characterized in that: Side rods (10) are arranged on both sides of the top of the sand box body (6); a first rotating shaft (11) is rotatably connected inside the side rod (10) on one side of the supporting bottom plate (1); a driving motor (12) is arranged on one side of the first rotating shaft (11); the driving motor (12) is connected to the side rod (10); and a second rotating shaft (13) is arranged inside the side rod (10) on the other side of the supporting bottom plate (1).

5. A sand box device for negative pressure casting according to claim 4, characterized in that: The second rotating shaft (13) is rotatably connected to the side rod (10), and a planar spiral spring (14) is provided between the second rotating shaft (13) and the side rod (10).

6. A sand box device for negative pressure casting according to claim 1, characterized in that: The blocking structure (16) comprises a fixing plate (1601), the inner side of which is in contact with the outer wall of the gas chamber (17); a blocking tube (1602) is arranged inside the fixing plate (1601), and the outer wall of the blocking tube (1602) is in contact with the inner wall of the air vent (15).

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