Locally inlaid combined sand core

Abstract

The utility model discloses a partial inlay combined sand core which comprises a sand core main body and a partition plate piece which is fixedly connected with the sand core main body, the partition plate piece is made of ceramsite with higher hardness so as to avoid the reduction of the strength of the part caused by thinner wall thickness, and meanwhile, the sand core main body is made of silica sand with lower cost, so that the manufacturing cost of the sand core main body is not changed; according to the utility model, the partition plate part is made of a material with higher cost, so that the manufacturing cost can be reduced while the strength of the part, which is easy to break, of the sand core is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sand cores. Background Art

[0002] Current water-jacketed cores have complex local shapes and thin walls in some areas, resulting in low core strength and easy breakage. Furthermore, during the molten iron pouring process, molten iron easily seeps into the core, causing sintering or veining, which can lead to product failure. To prevent sintering caused by localized molten iron infiltration due to thin walls, the existing technology requires the use of jelly sand for solidification and molding of the core. Compared to ordinary silica sand, jelly sand is more expensive. Therefore, considering the material cost and the loss of sand core scrap, the use of jelly sand for core production is more expensive.

[0003] Therefore, a new technical solution is needed to solve the above problems. Utility Model Content

[0004] In order to solve the problems caused by the prior art, the utility model provides a partially inlaid composite sand core, which is used to improve the strength of the easily broken part of the sand core while reducing the manufacturing cost.

[0005] To achieve the above-mentioned purpose, the partially inlaid composite sand core provided by the present invention can adopt the following technical solutions:

[0006] A partially inlaid composite sand core comprises a sand core body and a plurality of partition members; the sand core body comprises a plurality of inner walls forming a plurality of cavities, adjacent cavities are interconnected, and the connection point has a triangular inner wall protruding from both sides of the sand core body into the connection point, and a connected gap is formed between the two triangular inner walls; each partition member is installed below the gap, and the partition member comprises two ends with a triangular cross-section and a connecting plate connecting the two ends, the two ends are fixed one-to-one to the bottom of the two triangular inner walls, and the connecting plate is located below the gap; the hardness of the partition member is greater than the hardness of the sand core body.

[0007] Furthermore, the partition member is made of quartz sand.

[0008] Furthermore, the sand core body is silica sand.

[0009] Furthermore, the sand core body includes four side-by-side cavities, wherein the two cavities at the two ends are C-shaped cavities in cross section, and the two cavities in the middle are cavities with gaps at both ends.

[0010] Furthermore, the side surface of the end portion of the partition member is an arc-shaped surface, and the surface of the triangular inner wall is also an arc-shaped surface and is connected to the side surface of the end portion with the same curvature.

[0011] Beneficial effect: The partially inlaid composite sand core provided by the present invention disassembles the structure originally solidified and formed in one piece in the prior art, so that the partition parts use a material with higher hardness to avoid the reduction in strength of this part due to the thin wall thickness (the thinner part is the connecting plate part of the partition part), that is, the material strength is improved by this part to improve the structural strength. At the same time, the sand core body can also use the material in the prior art, such as silica sand, so that the manufacturing cost of the sand core body remains unchanged. Compared with the form of integral molding and solidification of the entire sand core using a higher material (for example, gem sand as a whole), since the manufacturing cost of the sand core body remains unchanged, only the partition part uses a higher cost material, which can improve the strength of the part of the sand core that is easy to break, and can also reduce the manufacturing cost.

[0012] The partially inlaid composite sand core provided by the utility model can also adopt the following technical solutions:

[0013] A partially inlaid composite sand core, characterized in that it includes a sand core body and several partition members; the sand core body includes several inner walls forming several cavities, adjacent cavities are connected to each other, and the connecting part has triangular inner walls protruding from both sides of the sand core body into the connecting part, and a connected gap is formed between the two triangular inner walls; each partition member is installed below the gap, and the partition member includes two ends with a triangular cross-section and a connecting plate connecting the two ends, the two ends are fixed one by one to the bottom of the two triangular inner walls, and the connecting plate is located below the gap; the material of the partition member is gem sand.

[0014] Furthermore, the sand core body is silica sand.

[0015] Beneficial effect: The partially inlaid composite sand core provided by the present invention disassembles the structure originally solidified and formed in one piece in the prior art, so that the partition parts use gem sand with higher hardness to avoid the reduction in strength of this part due to the thin wall thickness. At the same time, the main body of the sand core is still made of low-cost silica sand, so that the manufacturing cost of the main body of the sand core remains unchanged. Compared with the form of integral molding and solidification of the entire sand core using a higher material (for example, gem sand as a whole), since the manufacturing cost of the main body of the sand core remains unchanged, only the partition part uses a higher-cost material, which can improve the strength of the part of the sand core that is easy to break while also reducing the manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional diagram of a partially inlaid composite sand core in the present utility model;

[0017] Figure 2 A three-dimensional diagram of a partition member. DETAILED DESCRIPTION

[0018] The present invention is further illustrated below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the following specific implementation methods are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the present invention, modifications of various equivalent forms of the present invention by those skilled in the art all fall within the scope defined by the claims attached to this application.

[0019] See also Figure 1 As shown, the utility model discloses a partially inlaid composite sand core, which includes a sand core body 1 and a plurality of partition members 2.

[0020] The sand core body 1 includes several inner walls forming a plurality of cavities 3. Adjacent cavities 3 are interconnected, and the connection point has a triangular inner wall 4 protruding from both sides of the sand core body 1 into the connection point. A connected gap 5 is formed between the two triangular inner walls 4. The sand core body 1 includes four side-by-side cavities 3. The two cavities at the two ends have a C-shaped cross-section, and the two cavities in the middle have gaps at both ends.

[0021] Please combine Figure 1 and Figure 2 As shown, each partition member 2 is mounted below the gap 5. The partition member 2 includes two ends 6 with a triangular cross-section and a connecting plate 7 connecting the two ends 6. The two ends 6 are fixed to the bottom of the two triangular inner walls 4 in a one-to-one correspondence, and the connecting plate 7 is located below the gap 5. The side surfaces of the ends 6 are curved, and the surface of the triangular inner walls 4 is also curved, and they are connected to the side surfaces of the ends 6 with the same curvature.

[0022] In this embodiment, the integral sand core is divided into a core body 1 and several partitions 2. The partitions 2, serving as complex, thin-walled sections, are produced separately using specialized sand. These are then placed inside the core box and filled with ordinary silica sand, which solidifies to form the integral sand core. This ensures the formation of complex, thin-walled sections while preventing sintering caused by the infiltration of molten iron into the thin sections.

[0023] In this embodiment, to ensure the hardness of the partition member 2 is greater than that of the core body, the partition member is made of jewel sand, while the core body 1 is made of silica sand. Although silica sand is less hard than jewel sand, since the core body 1 has no thin sections, silica sand can achieve the required strength, and its cost is also lower than that of jewel sand. Furthermore, making the partition member 2 out of jewel sand increases its strength and reduces the overall core waste rate, allowing for a greater number of core recycling cycles and further reducing costs.

Claims

1. A partially inlaid composite sand core, characterized in that: It includes a sand core body and several partition members; the sand core body includes several inner walls forming several cavities, and the adjacent cavities are connected to each other, and the connecting part has triangular inner walls protruding from both sides of the sand core body to the connecting part, and a connected gap is formed between the two triangular inner walls; each partition member is installed below the gap, and the partition member includes two ends with a triangular cross-section and a connecting plate connecting the two ends, and the two ends are fixed one by one to the bottom of the two triangular inner walls, and the connecting plate is located below the gap; the hardness of the partition member is greater than the hardness of the sand core body.

2. The partially inlaid composite sand core according to claim 1, characterized in that: The material of the partition is pearl sand.

3. The partially inlaid composite sand core according to claim 2, characterized in that: The sand core body is silica sand.

4. The partially inlaid composite sand core according to claim 1, 2 or 3, characterized in that: The sand core body includes four side-by-side cavities, wherein the two cavities located at the two ends are C-shaped cavities in cross section, and the two cavities located in the middle are cavities with gaps at both ends.

5. The partially inlaid composite sand core according to claim 4, characterized in that: The side surface of the end portion of the partition member is an arc-shaped surface, and the surface of the triangular inner wall is also an arc-shaped surface and is connected to the side surface of the end portion with the same curvature.

6. A partially inlaid composite sand core, characterized in that: It includes a sand core body and several partition members; the sand core body includes several inner walls forming several cavities, and the adjacent cavities are connected to each other, and the connecting part has triangular inner walls protruding from both sides of the sand core body to the connecting part, and a connected gap is formed between the two triangular inner walls; each partition member is installed below the gap, and the partition member includes two ends with a triangular cross-section and a connecting plate connecting the two ends, and the two ends are fixed one by one to the bottom of the two triangular inner walls, and the connecting plate is located below the gap; the material of the partition member is gem sand.

7. The partially inlaid composite sand core according to claim 6, characterized in that: The sand core body is silica sand.

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