Die-casting die

Abstract

The utility model discloses a die-casting die which comprises a fixed die mounting plate and a movable die mounting plate, a fixed die body is fixed on the fixed die mounting plate, a movable die body is fixed on the movable die mounting plate, a male die is arranged on the surface of the movable die body, and a female die is arranged on the surface of the fixed die body. The movable die body and the fixed die body are pressed to enable the male die and the female die to be closed to form a cavity, air channels are formed in the movable die body and the fixed die body and located on the outer side of the cavity, one end of each air channel is connected with a cold air inlet, one end of each air channel is connected with a cold air outlet, and a vortex cooler is installed at each cold air inlet. The cold end outlet of the vortex cooler is connected with the cold air inlet, the air inlet end of the vortex cooler is connected with the compressed air source, the air channels are evenly distributed in the movable die body and the fixed die body and located on the outer sides of the male die and the female die, and the air channels are communicated with one another.

Description

Technical Field

[0001] The utility model belongs to the technical field of mold cooling, and particularly relates to a die-casting mold. Background Art

[0002] A die-casting mold is a tool for casting metal parts, and is a tool for completing the die-casting process on a special die-casting forging machine. The basic die-casting process is as follows: the molten metal is first cast into the mold cavity at a low speed or a high speed. The mold has a movable cavity surface, which is pressurized and forged during the cooling process of the molten metal, eliminating the shrinkage cavity and porosity defects of the blank, and also making the internal structure of the blank reach the broken grains in the forged state.

[0003] During the die-casting production process, the high-temperature molten metal solution is pressed into the mold cavity and cooled and formed through heat exchange with the mold. The die-casting mold needs to absorb heat and dissipate heat through space. The mold temperature gradually rises during the die-casting process, affecting the quality of the casting and the service life of the mold. Therefore, it is crucial to maintain a constant mold temperature. Currently, the cooling methods include extending the die-casting cycle, spraying mold release agent or coolant, and opening cooling water channels in the mold. Among them, extending the cycle reduces production efficiency, and the spraying effect is limited. Therefore, water cooling is the main method. Chillers are mostly used for cooling abroad, with high temperature control accuracy; tap water is used in China, with poor temperature control accuracy. Although direct water cooling of the mold has a good effect, since water directly contacts the mold to form heat exchange, it has a great thermal shock to the mold, and very fine micro-cracks are easily formed inside the mold. If the micro-cracks penetrate to the mold surface, it will affect the quality of the casting and the service life of the mold. Therefore, the utility model proposes a die-casting mold, and the internal cooling structure thereof can efficiently perform heat exchange operations, thereby accelerating the cooling and forming speed of the die-casting part.

[0004] In view of the problems in the related art, no effective solution has been proposed yet. Content of the Utility Model

[0005] To achieve the above object, the utility model provides the following technical solution: A die-casting mold includes a fixed mold mounting plate and a movable mold mounting plate. A fixed mold body is fixed on the fixed mold mounting plate, and a movable mold body is fixed on the movable mold mounting plate. A convex mold is arranged on the surface of the movable mold body, and a concave mold is arranged on the surface of the fixed mold body. The movable mold body and the fixed mold body are pressed together so that the convex mold and the concave mold are closed to form a cavity. Air passage channels are arranged on the outer sides of the cavity inside the movable mold body and the fixed mold body. One end of each air passage channel is connected to a cold air inlet, and the other end of each air passage channel is connected to a cold air outlet. An eddy current cooler is installed at the cold air inlet. The cold end outlet of the eddy current cooler is connected to the cold air inlet, and the air inlet end of the eddy current cooler is connected to a compressed air source.

[0006] As a preferred technical solution of the present utility model, the gas path channels are evenly distributed inside the moving die body and the fixed die body on the outer sides of the punch and the die cavity, and the gas path channels are interconnected with each other.

[0007] As a preferred technical solution of the present utility model, the gas path channels of the moving die body and the fixed die body are connected and communicated, and the cold end outlet of the eddy current cooler is connected to the cold air inlet at one end of the gas path channel of the fixed die body.

[0008] As a preferred technical solution of the present utility model, a flow dividing channel is connected to the end of the gas path channel of the fixed die body near the cold air inlet, the port of the flow dividing channel corresponds to the cold air inlet of the moving die body, and a sealing ring is fixed at the port of the flow dividing channel.

[0009] As a preferred technical solution of the present utility model, a heat conduction pipe is connected to the hot end outlet of the eddy current cooler.

[0010] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0011] By arranging gas path channels on the outer side of the cavity formed after the convex and concave dies of the moving and fixed dies are closed, and assembling an eddy current cooler at the cold air inlet of the gas path channels, the cooling system of the die-casting mold is constructed. By continuously inputting compressed air into the eddy current cooler and making full use of the unique refrigeration mechanism of the eddy current cooler, the efficient cooling of the air flow is realized. Subsequently, the cold air after the cooling treatment is smoothly introduced into the mold interior to efficiently perform the heat exchange operation, thereby significantly accelerating the cooling and forming speed of the die-cast part. Compared with the die-casting mold with a traditional water cooling structure, the present utility model shows significant advantages in improving production efficiency, optimizing the quality of the castings, and prolonging the service life of the mold. Description of the Drawings

[0012] The drawings are used to provide a further understanding of the present utility model, and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model, and do not constitute a limitation to the present utility model. In the drawings:

[0013] Figure 1 is a schematic cross-sectional structure diagram of the fixed die body and the moving die body of the present utility model;

[0014] Figure 2 is an enlarged structure diagram of part A in the present utility model;

[0015] In the figure: 1, fixed die mounting plate; 2, moving die mounting plate; 3, fixed die body; 4, moving die body; 5, punch; 6, die cavity; 7, cavity; 8, gas path channel; 9, cold air inlet; 10, cold air outlet; 11, eddy current cooler; 12, flow dividing channel; 13, sealing ring; 14, heat conduction pipe. Detailed implementation mode

[0016] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0017] Embodiment

[0018] Please refer to Figure 1-2 , the present invention provides the following technical solutions: a die-casting mold, including a fixed mold mounting plate 1 and a moving mold mounting plate 2. A fixed mold body 3 is fixed on the fixed mold mounting plate 1, and a moving mold body 4 is fixed on the moving mold mounting plate 2. A convex mold 5 is arranged on the surface of the moving mold body 4, and a concave mold 6 is arranged on the surface of the fixed mold body 3. The moving mold body 4 and the fixed mold body 3 are pressed together so that the convex mold 5 and the concave mold 6 are closed to form a cavity 7. Air passage channels 8 are arranged on the insides of the moving mold body 4 and the fixed mold body 3 outside the cavity 7. The air passage channels 8 are evenly distributed on the insides of the moving mold body 4 and the fixed mold body 3 outside the convex mold 5 and the concave mold 6, and the air passage channels 8 are communicated with each other. One end of the air passage channel 8 is connected to a cold air inlet 9, and one end of the air passage channel 8 is connected to a cold air outlet 10. An eddy current cooler 11 is installed at the cold air inlet 9. The cold end outlet of the eddy current cooler 11 is connected to the cold air inlet 9, and the air inlet end of the eddy current cooler 11 is connected to a compressed air source

[0019] A die-casting mold includes a fixed mold mounting plate 1 and a movable mold mounting plate 2. The fixed mold mounting plate 1 is equipped with a fixed mold body 3, and the movable mold mounting plate 2 is equipped with a movable mold body 4. On the surface of the movable mold body 4, a convex mold 5 is configured, and on the surface of the fixed mold body 3, a concave mold 6 is provided. When the movable mold body 4 and the fixed mold body 3 are closely combined, the convex mold 5 and the concave mold 6 will close to form a complete cavity 7. To achieve an efficient cooling effect, air passage channels 8 are provided inside the movable mold body 4 and the fixed mold body 3 at positions outside the cavity 7. The air passage channels 8 are evenly distributed and are located outside the convex mold 5 and the concave mold 6 to ensure the uniformity and efficiency of the cooling effect. At the same time, these air passage channels 8 are interconnected to ensure the smooth flow of the cooling gas. A cold air inlet 9 is provided at one end of the air passage channel 8, and a cold air outlet 10 is configured at the other end to facilitate the inflow and outflow of the air flow. To ensure the simplicity of the cold air source structure and improve the cooling effect, a vortex cooler 11 is installed at the cold air inlet 9. The cold end outlet of the vortex cooler 11 is directly connected to the cold air inlet 9, and its air inlet end is connected to a compressed air source. Through the action of the vortex cooler 11, the compressed air can be converted into cold air and introduced into the air passage channel 8 through the cold air inlet 9, thereby efficiently cooling the mold.

[0020] To facilitate the simultaneous cooling of the movable and fixed molds, in this embodiment, as a preferred technical solution of the present invention, the air passage channels 8 of the movable mold body 4 and the fixed mold body 3 are connected. The cold end outlet of the vortex cooler 11 is connected to the cold air inlet 9 at one end of the air passage channel 8 of the fixed mold body 3. An end of the air passage channel 8 of the fixed mold body 3 near the cold air inlet 9 is connected with a diversion channel 12. The port of the diversion channel 12 corresponds to the cold air inlet 9 of the movable mold body 4, and a sealing ring 13 is fixed at the port of the diversion channel 12.

[0021] To facilitate the recycling of the waste heat generated by the vortex cooler 11, a heat conduction tube 14 is used to divert it to the molten metal. In this embodiment, as a preferred technical solution of the present invention, the hot end outlet of the vortex cooler 11 is connected with a heat conduction tube 14.

[0022] In this embodiment, the vortex cooler 11 is a known technology that has been publicly available and widely used in daily life. Its working principle is that compressed air with a certain pressure enters the nozzle of the vortex tube and expands and accelerates. When the accelerated air flow enters a cylindrical vortex generator, the rotating air flow enters the inside of the heat pipe along the heat pipe wall. The air flow inside the heat pipe undergoes energy separation after vortex exchange, and the air flow is divided into two air flows, one is a hot air flow and the other is a cold air flow.

[0023] In summary, by means of the above technical solutions of the present utility model, during use, the moving die body 4 is fixed on the moving die mounting plate 2 of the die casting machine and moves with the moving die mounting plate 2 to close with the fixed die body 3 to form a cavity 7. The liquid metal fills the cavity 7 under high pressure through the sprue on the fixed die body 3. At the same time, compressed air is introduced into the air inlet end of the eddy current cooler 11, and the eddy current effect is generated by the compressed air in the eddy current cooler 11, thereby realizing the cooling of the gas. The cooled gas enters the gas path channel 8 inside the fixed die body 3 from the cold air inlet 9 of the fixed die body 3. After the cold air enters the gas path channel 8 of the fixed die body 3, it is shunted to the gas path channel 8 inside the moving die body 4 through the shunt channel 12 on one side. The cold air exchanges heat with the respective molds, thereby realizing the cooling of the die-casting parts. The gas path channel 8 of the present utility model can be designed conformally according to the structural characteristics of the shape of the cavity 7 to ensure rapid cooling as close as possible to the mold surface.

[0024] Finally, it should be noted that in the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "setting", "connection", "fixation", "swivel connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. It can be the internal communication of two components or the interaction relationship between two components. Unless otherwise clearly defined, for those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0025] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A die-casting mold, comprising a stationary mold mounting plate (1) and a moving mold mounting plate (2), a stationary mold body (3) is fixed on the stationary mold mounting plate (1), and a moving mold body (4) is fixed on the moving mold mounting plate (2), characterized in that: A punch (5) is provided on the surface of the moving die body (4), and a die cavity (6) is provided on the surface of the fixed die body (3). The moving die body (4) and the fixed die body (3) are pressed together so that the punch (5) and the die cavity (6) are closed to form a cavity (7). Air passage channels (8) are provided on the outer sides of the moving die body (4) and the fixed die body (3) inside the cavity (7). One end of the air passage channel (8) is connected to a cold air inlet (9), and one end of the air passage channel (8) is connected to a cold air outlet (10). An eddy current cooler (11) is installed at the cold air inlet (9). The cold end outlet of the eddy current cooler (11) is connected to the cold air inlet (9), and the air inlet end of the eddy current cooler (11) is connected to a compressed air source.

2. A die-casting mold according to claim 1, characterized in that: The air passage channels (8) are evenly distributed on the outer sides of the moving die body (4) and the fixed die body (3) inside the punch (5) and the die cavity (6), and the air passage channels (8) communicate with each other.

3. A die-casting mold according to claim 2, characterized in that: The air passage channels (8) of the moving die body (4) and the fixed die body (3) are connected, and the cold end outlet of the eddy current cooler (11) is connected to the cold air inlet (9) at one end of the air passage channel (8) of the fixed die body (3).

4. A die-casting mold according to claim 3, characterized in that: The end of the air passage channel (8) of the fixed die body (3) near the cold air inlet (9) is connected to a diversion channel (12). The port of the diversion channel (12) corresponds to the cold air inlet (9) of the moving die body (4), and a sealing ring (13) is fixed at the port of the diversion channel (12).

5. A die-casting mold according to claim 3, characterized in that: The hot end outlet of the eddy current cooler (11) is connected to a heat conduction pipe (14).

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