Sand box fastening device for casting

Abstract

The utility model belongs to the technical field of sand box casting, and particularly relates to a sand box fastening device for casting, which comprises an upper box and a lower box, four corners of a box body of the upper box are respectively provided with a first bolt hole penetrating from top to bottom, and four corners of a box body of the lower box are respectively provided with a second bolt hole penetrating from top to bottom; the first bolt holes and the second bolt holes are in one-to-one butt joint, and screw rods used for connecting the upper box and the lower box into a whole are assembled in the first bolt holes and the second bolt holes. A U-shaped limiting plate is further included. The limiting plate is tightly attached to the outer wall of the upper box and the outer wall of the lower box. Two limiting blocks are symmetrically arranged on the inner wall of the limiting plate, through holes are formed in the limiting blocks, and the two screw rods located on the same side are connected into the through holes of the limiting blocks correspondingly. According to the device, the screw can be quickly disassembled and assembled, the procedure of completely disassembling a nut and a gasket is reduced, and the working efficiency is improved; and the sand box is limited and fixed by connecting the limiting plate through the screw rod, so that the mold closing precision and the pressing effect of the upper and lower box bodies are ensured.

Description

Technical Field

[0001] This utility model belongs to the field of sand box casting technology, and in particular relates to a sand box fastening device for casting. Background Technology

[0002] Casting is a common production and processing method in the machinery industry, and molds are required in the casting process.

[0003] Sand molds are a commonly used type of casting mold, generally consisting of an upper mold and a lower mold, or simply an upper box and a lower box. After sand casting is completed, the upper and lower boxes need to be closed and pressed together. In the industry, heavy objects are often used to press the upper and lower boxes together to press the mold, but this method is often limited and inconvenient due to the difficulty in moving heavy objects and the limited number of available materials. Another method uses screws to connect the upper and lower boxes, but this is complex, requiring the screws to be removed from or installed into the through-holes in the sand box each time, reducing work efficiency. Furthermore, when using screws to connect the sand box, the upper and lower boxes may move during sand box handling and casting, resulting in less than ideal mold closing accuracy and pressing effect. Utility Model Content

[0004] In view of the technical problems existing in the background art, this utility model provides a sand box fastening device for casting.

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

[0006] A sand box fastening device for casting includes an upper box and a lower box, which are fitted together to form a sand box. The upper box has four through-hole bolt holes at its four corners, and the lower box has two through-hole bolt holes at its four corners. One side of each through-hole extends through the side of the upper box, and one side of each through-hole extends through the side of the lower box. The through-holes are connected one-to-one, and threaded rods are installed in each through-hole to connect the upper and lower boxes as a single unit. The device also includes a U-shaped limiting plate, which is fitted tightly against the outer walls of both the upper and lower boxes. Two symmetrically arranged limiting blocks are positioned on the inner wall of the limiting plate, each containing a through hole. Two threaded rods located on the same side are connected to the through holes of the limiting blocks.

[0007] Optionally, the bottom end of the upper box is provided with a limiting groove 1 communicating with bolt hole 1, and the upper end of the lower box is provided with a limiting groove 2 communicating with bolt hole 2. The limiting groove 1 and the limiting groove 2 are connected; the limiting block is fitted in the limiting groove 1 and the limiting groove 2.

[0008] Optionally, the upper end of the upper box is provided with an annular groove 1 communicating with bolt hole 1, and the bottom end of the lower box is provided with an annular groove 2 communicating with bolt hole 2. A gasket 1 is provided in the annular groove 1, and a gasket 2 is provided in the annular groove 2. Both gasket 1 and gasket 2 are sleeved on the screw.

[0009] Optionally, one end of the screw is provided with a hexagonal bolt head, and the bottom end of the lower box is provided with a limiting groove three that communicates with the annular groove two. The internal contour of the limiting groove three is set to a polygonal shape, and the hexagonal bolt head is fitted in the limiting groove three. One side of the limiting groove three is provided to penetrate the side of the lower box.

[0010] Optionally, the bottom end of the lower box is provided with several notches that are connected to the limiting groove.

[0011] Optionally, a locking nut is fitted onto the screw, and the locking nut is tightly fitted onto the upper end face of the upper box.

[0012] Optionally, the cross-sections of the first bolt hole and the second bolt hole are configured as U-shaped.

[0013] This utility model has the following advantages and beneficial effects:

[0014] The sand box fastening device of this utility model allows for quick installation and removal of the screw. By having four through-hole bolt holes at the four corners of the upper box and four through-hole bolt holes at the four corners of the lower box, the screw can be installed or removed directly from the side of the box. This structure reduces the need for complete disassembly of nuts and washers, improving work efficiency. Secondly, the limiting plate connected to the screw is fitted onto the outer wall of the contact surface between the upper and lower boxes, thus limiting and fixing the box. This connection structure, using the screw and limiting plate to limit and fix the sand box, ensures stable connection of the box during sand box handling and casting, guaranteeing the mold closing accuracy and clamping effect of the upper and lower boxes. Attached Figure Description

[0015] Figure 1 This is one of the structural diagrams of a casting sand box fastening device in a utility model.

[0016] Figure 2 This is the second structural diagram of the casting sand box fastening device in the utility model.

[0017] Figure 3 for Figure 1 A magnified view of a portion of point a;

[0018] Figure 4 for Figure 2 A magnified view of a section at point b in the middle;

[0019] Figure 5This is one of the schematic diagrams showing the installation of the upper and lower casting boxes in a utility model.

[0020] Figure 6 This is the second schematic diagram of the installation of the upper and lower casting boxes in a utility model.

[0021] Figure 7 for Figure 5 A magnified view of a section at point c in the middle;

[0022] Figure 8 for Figure 5 Top view;

[0023] Figure 9 for Figure 6 A bottom view;

[0024] Figure 10 This is a connection structure diagram of the screw and the limiting plate in the utility model;

[0025] Figure 11 This is a structural diagram of the screw in the utility model;

[0026] Figure 12 This is a structural diagram of the limiting plate in the utility model.

[0027] Attached reference numerals: 1-Upper box, 11-Bolt hole one, 12-Annular groove one, 13-Limiting groove one, 2-Lower box, 21-Bolt hole two, 22-Annular groove two, 23-Limiting groove three, 24-Notch, 25-Limiting groove two, 3-Screw, 31-Hex bolt head 31, 32-Washer two, 33-Washer one, 34-Locking nut, 4-Limiting plate, 41-Limiting block, 42-Through hole. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0030] Example

[0031] like Figures 1-12As shown, a sand box fastening device for casting includes an upper box 1 and a lower box 2, which are fitted together to form a sand box. The upper box 1 has four through-holes 11 at its four corners, and the lower box 2 has two through-holes 21 at its four corners. One side of the first bolt hole 11 extends through the side of the upper box 1, and one side of the second bolt hole 21 extends through the side of the lower box 2. When the upper box 1 and lower box 2 are installed, the first bolt hole 11 and the second bolt hole 21 are aligned one-to-one, and a threaded rod 3 is fitted into the first bolt hole 11 and the second bolt hole 21 to connect the upper box 1 and the lower box 2 as a whole. The threaded rod 3 can be directly installed from the sides of the upper box 1 and the lower box 2 into the first bolt hole 11 and the second bolt hole 21 without needing to be inserted from top to bottom, and without needing to completely remove the locking nut 34 on the threaded rod 3 before disassembling and reassembling the threaded rod 3. It also includes a U-shaped limiting plate 4, the shape of which is the same as the shape of the sand box. The limiting plate 4 is set tightly against the outer wall of the upper box 1 and the lower box 2. Two limiting blocks 41 are symmetrically arranged on the inner wall of the limiting plate 4. The limiting blocks 41 are provided with through holes 42, and two screws 3 located on the same side are respectively connected to the through holes 42 of the limiting blocks 41. Locking nuts 34 are fitted on the screws 3 and are set tightly against the upper end face of the upper box 1.

[0032] The sand box fastening device of this utility model allows for quick installation and removal of the screw rod 3. Through bolt holes 11 extending downwards are provided at the four corners of the upper box 1, and through bolt holes 21 extending downwards are provided at the four corners of the lower box 2. This allows the screw rod 3 to be installed or removed directly from the side of the box. This structure reduces the need for complete disassembly of the nuts and washers, improving work efficiency. Secondly, the limiting plate 4 connected to the screw rod 3 is fitted onto the outer wall of the contact surface between the upper box 1 and the lower box 2, thus limiting and fixing the box. This connection structure, using the screw rod 3 connected to the limiting plate 4 to limit and fix the sand box, ensures stable connection of the box during sand box handling and casting, guaranteeing the mold closing accuracy and clamping effect of the upper and lower boxes.

[0033] Reference Figure 1 In this utility model, only one limiting plate 4 is provided, which is set on one side of the sand box structure. Of course, two limiting plates 4 can also be provided, which are symmetrically set on both sides of the sand box structure to completely wrap the sand box structure and achieve a better limiting and fixing effect.

[0034] like Figures 1-12As shown, furthermore, the bottom end of the upper box 1 is provided with a limiting groove 13 communicating with bolt hole 11, and the upper end of the lower box 2 is provided with a limiting groove 25 communicating with bolt hole 21. The limiting groove 13 and the limiting groove 25 are connected; the limiting block 41 is fitted in the limiting groove 13 and the limiting groove 25. Through the cooperation of the limiting block 41 with the limiting groove 13 and the limiting groove 25, the positioning and installation of the limiting plate 4, the upper box 1 and the lower box 2 are realized.

[0035] like Figures 1-12 As shown, the upper end of the upper box 1 is provided with an annular groove 12 that communicates with the bolt hole 11, and the bottom end of the lower box 2 is provided with an annular groove 22 that communicates with the bolt hole 21. A gasket 33 is provided in the annular groove 12, and a gasket 32 ​​is provided in the annular groove 22. Both the gasket 33 and the gasket 32 ​​are fitted onto the screw 3. In this structure, washer 33 is placed in annular groove 12 and washer 32 is placed in annular groove 22. When the locking nut 34 is tightened, the entire screw 3 is completely restricted and cannot be disengaged from bolt hole 11 and bolt hole 21, thereby increasing the connection firmness of the side-grooved screw 3 installation structure. When it is necessary to disassemble the screw 3, simply loosen the locking nut 34, move washer 33 and washer 32 so that washer 33 leaves annular groove 12 and washer 32 leaves annular groove 22, and the screw 3 and locking nut 34 can be taken out from the side of bolt hole 11 and bolt hole 21.

[0036] like Figures 1-12 As shown, furthermore, one end of the screw 3 is provided with a hexagonal bolt head 31, and the bottom end of the lower box 2 is provided with a limiting groove 3 23 that communicates with the annular groove 22. The internal contour of the limiting groove 3 23 is set in a polygonal shape, and the hexagonal bolt head 31 is fitted in the limiting groove 3 23. One side of the limiting groove 3 23 extends through the side of the lower box 2. The design of the limiting groove 3 23 allows the hexagonal bolt head 31 to be placed in the limiting groove 3 23 when the screw 3 is installed directly from the side. At the same time, the inner wall of the limiting groove 3 23 is polygonal, which cooperates with the hexagonal bolt head 31. After the hexagonal bolt head 31 is installed in the limiting groove 3 23, the screw 3 cannot rotate, thus facilitating the operation of tightening or loosening the locking nut 34.

[0037] like Figures 1-12 As shown, furthermore, the bottom end of the lower box 2 is provided with several notches 24 that communicate with the limiting groove 23. The screw 3 can be retracted downward into the notches 24, which facilitates the assembly and disassembly of the screw 3.

[0038] like Figures 1-12 As shown, the cross-sections of bolt hole 11 and bolt hole 21 are U-shaped.

[0039] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A sand box fastening device for casting, comprising an upper box and a lower box, wherein the upper box and the lower box are fitted together to form a sand box, characterized in that: The upper box has four through bolt holes at its four corners, and the lower box has two through bolt holes at its four corners. One side of each bolt hole extends through the side of the upper box, and one side of each bolt hole extends through the side of the lower box. The bolt holes are connected one to one, and bolts for connecting the upper and lower boxes together are installed in the bolt holes. It also includes a U-shaped limiting plate, which is set close to the outer wall of the upper box and the lower box; two limiting blocks are symmetrically arranged on the inner wall of the limiting plate, and through holes are provided in the limiting blocks, wherein two screws located on the same side are respectively connected to the through holes of the limiting blocks.

2. The casting sand box fastening device according to claim 1, characterized in that: The bottom end of the upper box is provided with a limiting groove 1 that communicates with bolt hole 1, and the upper end of the lower box is provided with a limiting groove 2 that communicates with bolt hole 2. The limiting groove 1 and the limiting groove 2 are connected; the limiting block is fitted in the limiting groove 1 and the limiting groove 2.

3. The casting sand box fastening device according to claim 1, characterized in that: The upper end of the upper box is provided with an annular groove 1 that communicates with bolt hole 1, and the bottom end of the lower box is provided with an annular groove 2 that communicates with bolt hole 2. A gasket 1 is provided in the annular groove 1, and a gasket 2 is provided in the annular groove 2. Both gasket 1 and gasket 2 are sleeved on the screw rod.

4. The casting sand box fastening device according to claim 3, characterized in that: One end of the screw is provided with a hexagonal bolt head, and the bottom end of the lower box is provided with a limiting groove three that communicates with the annular groove two. The internal contour of the limiting groove three is set as a polygon. The hexagonal bolt head is fitted in the limiting groove three. One side of the limiting groove three is provided to penetrate the side of the lower box.

5. The casting sand box fastening device according to claim 4, characterized in that: The bottom of the lower box has several notches that are connected to the limiting groove.

6. The casting sand box fastening device according to claim 4, characterized in that: A locking nut is fitted onto the screw, and the locking nut is tightly fitted onto the upper end face of the upper box.

7. The casting sand box fastening device according to claim 1, characterized in that: The cross-sections of bolt hole one and bolt hole two are U-shaped.

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