Sand box structure for casting processing of castings

Abstract

The utility model discloses a sand box structure is used in foundry processing of casting, including pit, lower box and upper box, be provided with lower box in pit, be provided with upper box at the top of lower box, be provided with the axle pole eye at the center of upper box, be provided with lower part cavity in lower box, be provided with inner core in lower part cavity, be provided with the locating plate at the top surface of inner core, be provided with the locating hole in the center of locating plate, and the locating hole is concentric with axle pole eye, pit. The utility model discloses adopt the mode of locating plate and axle pole eye intercoordination to carry out the closing of box, has guaranteed the alignment accuracy of upper and lower box higher, avoided the cumulative error in traditional cross line method, can realize the closing of box of higher accuracy, has greatly shortened the closing of box time, thereby has promoted the overall quality of casting.

Description

Technical Field

[0001] This utility model relates to a sand box, and more particularly to a sand box structure for casting processing, belonging to the field of casting technology. Background Technology

[0002] In the casting process, mold assembly is the precise combination and fixation of the upper sand mold (upper mold box) and lower sand mold (lower mold box) to form a complete casting cavity. Therefore, mold assembly is a crucial step in casting, directly affecting the quality of the casting and the yield rate. The traditional mold assembly method generally uses the "cross-marking" method. Although this method is simple and easy to operate, it has a certain cumulative error, with an accuracy of about 3-5mm. Improper mold assembly can easily lead to the following problems: ① Misalignment: The upper and lower mold cavities are not aligned, resulting in misalignment of the casting; ② Flash (burrs): Poor sealing of the parting surface causes molten metal to leak and form excess thin flakes; ③ Porosity: Poor venting causes gas to accumulate in the mold cavity; ④ Sand holes: Sand particles fall into the mold cavity during mold assembly, contaminating the casting. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a sand box structure for casting processing, which improves the efficiency and accuracy of box assembly, reduces human error, and ensures the smooth progress of the subsequent pouring process.

[0004] The technical solution adopted by this utility model to solve the technical problem is as follows:

[0005] A sand box structure for casting processing includes a pit, a lower box, and an upper box. The lower box is located inside the pit, and the upper box is located above the lower box. A shaft eye is located at the center of the upper box. A lower cavity is located inside the lower box, and an inner core is located inside the lower cavity. A positioning plate is located on the top surface of the inner core, and a positioning hole is located at the center of the positioning plate. The positioning hole is concentric with the shaft eye and the pit.

[0006] The lower box is concentric with the pit.

[0007] The diameter of the positioning hole is the same as the diameter of the shaft eye.

[0008] The upper box has an upper cavity, and the lower box and the upper box are combined to form a complete cavity inside.

[0009] The positive and beneficial effects of this utility model are:

[0010] 1. This utility model uses a positioning plate and axle eye to cooperate in the assembly of the mold, which ensures higher alignment accuracy between the upper and lower molds, avoids the cumulative error in the traditional crosshair method, and can achieve higher precision assembly to meet the requirements of high precision castings.

[0011] 2. In this utility model, the lower box and the pit are concentric. When using it, first adjust the position of the positioning plate so that the center hole of the positioning plate is concentric with the pit. Then, the upper box is placed on the lower box so that the position of the upper box shaft eye corresponds to the upper and lower positioning hole of the positioning plate. This completes the box closing operation, greatly shortens the box closing time, and thus improves the overall quality of the casting. Attached Figure Description

[0012] Fig. 1 This is a schematic diagram of the structure of this utility model;

[0013] Fig. 2 This is a schematic diagram of the positioning plate of this utility model.

[0014] Among them: 1-pit, 2-lower box, 3-upper box, 4-shaft eye, 5-inner core, 6-positioning plate, 7-positioning hole. Detailed Implementation

[0015] The present invention will be further explained and described below with reference to the accompanying drawings:

[0016] Example, Participation Figs. 1-2 A sand box structure for casting processing includes a pit 1, a lower box 2 and an upper box. The lower box 2 is set inside the pit 1, and the upper box 3 is set above the lower box 2. A shaft eye 4 is set at the center of the upper box 3. A lower cavity is set inside the lower box 2. An inner core 5 is set inside the lower cavity. A positioning plate 6 is set on the top surface of the inner core 5. A positioning hole 7 is set at the center of the positioning plate 6. The positioning hole 7 is concentric with the shaft eye 4 and the pit 1 respectively.

[0017] Lower box 2 is concentric with pit 1.

[0018] The diameter of the positioning hole 7 is the same as the diameter of the shaft eye 4.

[0019] An upper cavity is provided inside the upper box 3. The lower box 2 and the upper box 3 are combined together to form a complete cavity inside.

[0020] In the above description, the upper box has an upper cavity, and the lower box has a lower cavity. When the upper box and the lower box are combined, they form a complete cavity structure.

[0021] In the above description, the device is constructed by separately shaping the upper and lower boxes.

[0022] In the above description, the positioning plate is made of plywood.

[0023] In the above description, the upper box has a shaft eye at its center.

[0024] Working principle:

[0025] ① First, use the axle scraper to rotate once in the pit to scrape out the shape of the lower box;

[0026] ② Lower the inner core into the pit and align it with the lower core head;

[0027] ③ Make a positioning plate with a hole in the middle using plywood, place it on the inner core 2, and ensure that the positioning hole on the positioning plate is concentric with the pit and that the diameter of the positioning hole is the same as that of the shaft.

[0028] ④ When the upper box is scraped with the axle scraper, an axle hole will be left in the center;

[0029] ⑤ When closing the boxes, simply align the shaft eye 4 of the upper box with the positioning hole of the lower box;

[0030] ⑥ After the box is assembled, the required complete cavity is formed.

[0031] This invention employs a positioning plate and axle eye working together to close the mold, ensuring higher alignment accuracy between the upper and lower molds. This avoids the cumulative errors of the traditional crosshair method, enabling higher precision mold closing, significantly shortening the mold closing time, and thus improving the overall quality of the casting.

Claims

1. A sand box structure for casting processing, comprising a pit (1), a lower box (2) and an upper box (3), characterized in that: The pit (1) is provided with a lower box (2), and an upper box (3) is provided above the lower box (2). A shaft eye (4) is provided at the center of the upper box (3). The lower box (2) is provided with a lower cavity. An inner core (5) is provided in the lower cavity. A positioning plate (6) is provided on the top surface of the inner core (5). A positioning hole (7) is provided at the center of the positioning plate (6). The positioning hole (7) is concentric with the shaft eye (4) and the pit (1).

2. The sand box structure for casting processing according to claim 1, characterized in that: The lower box (2) is concentric with the pit (1).

3. The sand box structure for casting processing according to claim 1, characterized in that: The diameter of the positioning hole (7) is the same as the diameter of the shaft eye (4).

4. The sand box structure for casting processing according to claim 1, characterized in that: The upper box (3) is provided with an upper cavity, and the lower box (2) and the upper box (3) are combined together to form a complete cavity inside.

5. The sand box structure for casting processing according to claim 1, characterized in that: The positioning plate (6) is made of plywood.

6. The sand box structure for casting processing according to claim 1, characterized in that: The upper box (3) is provided with a shaft eye (4) at its center.

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