Salt core for piston with special shape

Abstract

The utility model discloses a salt core for a piston in a special shape, which relates to the technical field of salt cores and comprises a salt core main body which is in a circular ring shape and is provided with a plurality of grooves. The salt core further comprises a piston main body, an oil passing path is arranged on the piston main body, and the salt core main body is arranged in the oil passing path; after the piston is manufactured, the salt core main body can be easily removed through a water dissolving method, and the grooves are additionally formed in the salt core main body, so that gas can be stored when the piston main body is cast, the exhaust performance during casting is improved, and the problem that the gas cannot be exhausted easily due to the fact that the salt core main body is too smooth is solved. The two salt core positioning blocks are arranged on the piston body, the casting defects of cold shut, air holes and the like of a piston product are avoided, the two positioning pieces are made of metal pieces and matched with the oil inlet hole and the oil outlet hole, when casting of the piston body is completed, the two salt core positioning blocks are taken down, the oil inlet hole and the oil outlet hole are formed, and the piston forming effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of salt cores, and particularly relates to a salt core for a piston with a special shape. Background Art

[0002] In the design and manufacturing process of pistons, the application of salt cores is an important technological innovation. Salt cores, mainly made of salt materials such as sodium chloride or potassium chloride, have excellent thermal stability and chemical stability, which gives them unique advantages in piston manufacturing.

[0003] In the production process of pistons, salt cores are used as the inner cores of molds to form complex cavity structures inside the pistons. Due to the high thermal stability of salt cores, they can maintain a stable shape in high-temperature environments, ensuring the accuracy of the piston cavity structure. At the same time, the chemical stability of salt cores makes them not easily react with surrounding materials during the manufacturing process, thus guaranteeing the quality and reliability of the pistons. In addition, salt cores also have the characteristics of being easy to process and remove. After the piston is manufactured, the salt core can be easily removed by a simple water dissolution method, avoiding the stress and surface damage that may be caused by traditional machining methods. This makes the piston manufacturing process more simple and efficient, reducing production costs.

[0004] When the existing salt cores are used in piston manufacturing, the gas on them is not easily discharged, and casting defects such as cold shuts and pores are likely to form in the piston products. Therefore, we provide a salt core for a piston with a special shape. Summary of the Utility Model

[0005] The technical problem solved by the utility model is: when the existing salt cores are used in piston manufacturing, the gas on them is not easily discharged, and cold shuts and pores are likely to form in the piston products.

[0006] The utility model can be realized through the following technical solutions: a salt core for a piston with a special shape, including a salt core main body, the salt core main body is in an annular shape, and a plurality of grooves are provided on the salt core main body.

[0007] A further technical improvement of the utility model lies in: it further includes a piston main body, a fuel passage is provided on the piston main body, and the salt core main body is arranged in the fuel passage.

[0008] A further technical improvement of the utility model lies in: two positioning parts are provided on the salt core main body, and the two positioning parts are evenly arranged on one side of the salt core main body. Oil inlet holes and oil outlet holes adapted to the two positioning parts are provided on the piston main body, and both the oil inlet holes and the oil outlet holes are communicated with the fuel passage.

[0009] A further technical improvement of the present utility model lies in that: each positioning member includes a salt core positioning block, and two salt core positioning blocks are evenly arranged on one side of the salt core body, and the two salt core positioning blocks are respectively adapted to the oil inlet hole and the oil outlet hole.

[0010] A further technical improvement of the present utility model lies in that: an upper arc surface is provided on one side of the salt core body, an upper arc groove is also provided on the oil passage, and the upper arc surface is adapted to the upper arc groove.

[0011] A further technical improvement of the present utility model lies in that: a lower arc surface is provided on the other side of the salt core body, a lower arc groove adapted thereto is also provided on the oil passage, and the lower arc surface is arranged opposite to the upper arc surface.

[0012] Compared with the prior art, the present utility model has the following beneficial effects:

[0013] (1) The salt core body is used as the inner core of the piston body mold to form an annular cavity structure inside the piston body, that is, the oil passage. Since the salt core has high thermal stability, it can maintain a stable shape in a high-temperature environment, ensuring the accuracy of the piston oil passage. At the same time, the chemical stability of the salt core makes it not easily chemically react with the surrounding materials during the manufacturing process, thus ensuring the quality and reliability of the piston. In addition, after the piston is manufactured, the salt core body can be easily removed by the water dissolution method. Multiple grooves are added outside the salt core body, so that gas can be stored during the casting of the piston body, increasing the exhaust performance during casting. Avoiding that if the salt core body is too smooth, it will cause poor gas discharge and avoid casting defects such as cold shuts and air holes in the piston product;

[0014] (2) The two positioning members are composed of metal parts, and the two positioning members are adapted to the oil inlet hole and the oil outlet hole. During the casting process of the piston body, the salt core positioning blocks composed of the two metal parts can support the salt core body, ensuring the stability of the formed oil passage. When the piston body casting is completed, the two salt core positioning blocks are removed to form the oil inlet hole and the oil outlet hole. The upper arc surface and the lower arc surface provided on the salt core body can make the upper arc groove and the lower arc groove formed on the oil passage during the piston forming process. The upper arc groove and the lower arc groove can improve the smoothness of the oil flow in the oil passage of the piston during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] For the convenience of those skilled in the art to understand, the present utility model will be further described below with reference to the accompanying drawings.

[0016] Figure 1 is a schematic structural diagram of the salt core body of the present utility model;

[0017] Figure 2 is a schematic structural diagram of the piston body of the present utility model;

[0018] Figure 3 Another perspective sectional view of the salt core body of the present utility model;

[0019] Figure 4 Another perspective sectional view of the piston body of the present utility model.

[0020] In the figure: 1, salt core body; 2, groove; 3, oil passage; 4, positioning member; 401, salt core positioning block; 5, oil inlet hole; 6, oil outlet hole; 7, upper arc surface; 8, lower arc surface; 9, upper arc groove; 10, lower arc groove; 11, piston body. Detailed implementation manners

[0021] To further elaborate on the technical means and effects adopted by the present utility model to achieve the predetermined utility model purpose, the following, in conjunction with the drawings and preferred embodiments, details the specific implementation manners, structures, features and their effects of the present utility model as follows.

[0022] Please refer to Figures 1 - 4 As shown, the present utility model provides a salt core for a piston with a special shape; it includes a salt core body 1, the salt core body 1 is in an annular shape, and a plurality of grooves 2 are provided on the salt core body 1; it also includes a piston body 11, an oil passage 3 is provided on the piston body 11, and the salt core body 1 is arranged in the oil passage 3; the salt core body 1 is used as the inner core of the mold of the piston body 11 to form an annular cavity structure inside the piston body 11, that is, the oil passage 3. Since the salt core has high thermal stability, it can maintain a stable shape in a high-temperature environment to ensure the accuracy of the piston oil passage 3. At the same time, the chemical stability of the salt core makes it not easily chemically react with the surrounding materials during the manufacturing process, thus ensuring the quality and reliability of the piston. In addition, after the piston is manufactured, the salt core body 1 can be easily removed by the water dissolution method. Moreover, a plurality of grooves 2 are added to the salt core body 1, so that gas can be stored during the casting of the piston body 11, increasing the exhaust performance during casting. It is avoided that if the salt core body 1 is too smooth, it will cause poor gas discharge, and casting defects such as cold shuts and porosity in the piston product are avoided.

[0023] There are two positioning members 4 provided on the salt core body 1, and the two positioning members 4 are evenly arranged on one side of the salt core body 1. An oil inlet hole 5 and an oil outlet hole 6 adapted to the two positioning members 4 are provided on the piston body 11, and both the oil inlet hole 5 and the oil outlet hole 6 communicate with the oil passage 3. Each positioning member 4 includes a salt core positioning block 401. The two salt core positioning blocks 401 are evenly arranged on one side of the salt core body 1, and the two salt core positioning blocks 401 are respectively adapted to the oil inlet hole 5 and the oil outlet hole 6. The two positioning members 4 are made of metal parts. During the casting process of the piston body 11, the salt core positioning blocks 401 composed of the two metal parts can support the salt core body 1, and the two positioning members 4 are adapted to the oil inlet hole 5 and the oil outlet hole 6. When the piston body 11 is cast, the two salt core positioning blocks 401 are removed to form the oil inlet hole 5 and the oil outlet hole 6.

[0024] An upper arc surface 7 is provided on one side of the salt core body 1, and an upper arc groove 9 is also provided on the oil passage 3, and the upper arc surface 7 is adapted to the upper arc groove 9. A lower arc surface 8 is provided on the other side of the salt core body 1, and a lower arc groove 10 adapted to it is also provided on the oil passage 3, and the lower arc surface 8 is arranged opposite to the upper arc surface 7. The upper arc surface 7 and the lower arc surface 8 provided on the salt core body 1 can enable the upper arc groove 9 and the lower arc groove 10 to be formed on the oil passage 3 during piston forming. The upper arc groove 9 and the lower arc groove 10 can improve the smoothness of oil flow when the oil passage 3 of the piston is in use.

[0025] When the present utility model is in use, the salt core body 1 is used as the inner core of the piston body 11 mold to form the annular cavity structure inside the piston body 11, that is, the oil passage 3. Since the salt core has high thermal stability, it can maintain a stable shape in a high-temperature environment, ensuring the accuracy of the piston oil passage 3. At the same time, the chemical stability of the salt core makes it not easy to chemically react with the surrounding materials during the manufacturing process, thus ensuring the quality and reliability of the piston. In addition, after the piston is manufactured, the salt core body 1 can be easily removed by the water dissolution method. Multiple grooves 2 are added to the salt core body 1, so that gas can be stored during the casting of the piston body 11, increasing the exhaust performance during casting. This avoids the situation that if the salt core body 1 is too smooth, the gas is not easy to discharge, and avoids casting defects such as cold shuts and pores in the piston product.

[0026] The two positioning members 4 are made of metal parts, and the two positioning members 4 are adapted to the oil inlet hole 5 and the oil outlet hole 6. When the piston body 11 is cast, the two salt core positioning blocks 401 are removed to form the oil inlet hole 5 and the oil outlet hole 6. The upper arc surface 7 and the lower arc surface 8 provided on the salt core body 1 can enable the upper arc groove 9 and the lower arc groove 10 to be formed on the oil passage 3 during piston forming. The upper arc groove 9 and the lower arc groove 10 can improve the smoothness of oil flow when the oil passage 3 of the piston is in use.

[0027] As described above, it is only the preferred embodiment of the present utility model, and there is no restriction on the present utility model in any form. Although the present utility model has been disclosed above with the preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications to equivalent embodiments of equivalent changes by using the above-disclosed technical content within the scope of the technical solution of the present utility model. However, as long as it does not depart from the content of the technical solution of the present utility model, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. A salt core for a piston with a special shape, characterized in that, It includes a salt core body (1), the salt core body (1) is annular, and a plurality of grooves (2) are provided on the salt core body (1); It further includes a piston body (11), an oil passage (3) is provided on the piston body (11), and the salt core body (1) is arranged in the oil passage (3); Two positioning members (4) are provided on the salt core body (1), and the two positioning members (4) are evenly arranged on one side of the salt core body (1). An oil inlet hole (5) and an oil outlet hole (6) adapted to the two positioning members (4) are provided on the piston body (11), and both the oil inlet hole (5) and the oil outlet hole (6) are communicated with the oil passage (3); Each positioning member (4) includes a salt core positioning block (401), the two salt core positioning blocks (401) are evenly arranged on one side of the salt core body (1), and the two salt core positioning blocks (401) are respectively adapted to the oil inlet hole (5) and the oil outlet hole (6); An upper arc surface (7) is provided on one side of the salt core body (1), an upper arc groove (9) is also provided on the oil passage (3), and the upper arc surface (7) is adapted to the upper arc groove (9).

2. The salt core for a piston with a special shape according to claim 1, characterized in that, A lower arc surface (8) is provided on the other side of the salt core body (1), a lower arc groove (10) adapted thereto is also provided on the oil passage (3), and the lower arc surface (8) is arranged opposite to the upper arc surface (7).

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