A precision die-casting mold core structure with rapid heat dissipation

Abstract

This utility model discloses a precision die-casting mold core structure with rapid heat dissipation, including a core body. The core body has a spiral cooling channel inside, with its inlet and outlet located at opposite ends. The core body also contains a temperature sensor and at least one phase change material (PCM) cavity, located within the spiral cooling channel and filled with PCM material. The dual-layer composite structure balances thermal conductivity and heat resistance. The spiral cooling channel, combined with turbulence protrusions, enhances heat exchange efficiency. The PCM cavity stabilizes its temperature through latent heat regulation, and heat dissipation fins assist natural convection, forming a multi-dimensional heat dissipation system that significantly improves the heat dissipation rate. The temperature sensor and control system work together to achieve intelligent temperature control, reducing energy waste.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, specifically to a precision die-casting mold core structure with rapid heat dissipation. Background Technology

[0002] In precision die casting production, the mold core, as a key component that comes into direct contact with the high-temperature molten metal, directly affects the casting quality and production efficiency. Existing mold core structures generally suffer from insufficient heat dissipation efficiency: traditional cooling channels are mostly straight lines or simple curves, resulting in limited contact area with the mold core. This leads to laminar flow of the coolant, resulting in low heat exchange efficiency. Furthermore, the lack of effective auxiliary heat dissipation methods makes it difficult to address localized high-temperature accumulation, leading to uneven temperature distribution within the mold core and a tendency for thermal stress deformation. Utility Model Content

[0003] In order to overcome the shortcomings of existing technical solutions, this utility model provides a precision die-casting mold core structure with rapid heat dissipation, which can effectively solve the problems mentioned in the background art.

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

[0005] A precision die-casting mold core structure with rapid heat dissipation includes a core body, a spiral cooling channel inside the core body, the inlet and outlet of the spiral cooling channel being located at opposite ends of the core body, a temperature sensor and at least one phase change material cavity inside the core body, the phase change material cavity being located within the spiral cooling channel and filled with phase change material;

[0006] The core body is a double-layer composite structure, comprising an inner high thermal conductivity layer and an outer heat-resistant layer. The high thermal conductivity layer is made of copper alloy, and the heat-resistant layer is made of mold steel. The high thermal conductivity layer is completely enclosed within the heat-resistant layer.

[0007] As a further description of the above technical solution, the spiral cooling channel has a spiral spacing of 5-10mm and a channel diameter of 3-8mm, and the axis of the spiral cooling channel coincides with the axis of the mold core body.

[0008] As a further description of the above technical solution, the phase change material cavity is an annular structure, arranged around the spiral cooling channel, and the inner wall of the phase change material cavity is spaced 2-5mm apart from the outer wall of the spiral cooling channel.

[0009] As a further description of the above technical solution, a detachable cooling module is provided on the top of the mold core body. The cooling module includes a cooling pipe and a connector. One end of the cooling pipe is connected to the inlet of the spiral cooling channel, and the other end is connected to an external cooling system through the connector.

[0010] As a further description of the above technical solution, a sealing ring is provided at the end of the connector, and the sealing ring is nested at the inlet.

[0011] As a further description of the above technical solution, multiple heat dissipation fins are evenly distributed on the outer side wall of the mold core body. The height of the heat dissipation fins is 10-20mm and the thickness is 2-5mm. The heat dissipation fins are integrally formed with the mold core body.

[0012] As a further description of the above technical solution, the temperature sensor is located between the spiral cooling channel and the phase change material cavity, and the signal output terminal of the temperature sensor is connected to an external control system.

[0013] As a further description of the above technical solution, the inner wall of the spiral cooling channel is provided with turbulence protrusions, the turbulence protrusions are triangular in structure, and the turbulence protrusions are evenly distributed along the axial direction of the spiral cooling channel.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] The present invention provides a precision die-casting mold core structure with rapid heat dissipation, which has at least one of the following beneficial effects during use:

[0016] The dual-layer composite structure balances thermal conductivity and heat resistance. A spiral cooling channel combined with turbulence-enhancing protrusions improves heat exchange efficiency. The phase change material cavity stabilizes the temperature through latent heat regulation, and heat dissipation fins assist natural convection, forming a multi-dimensional heat dissipation system that significantly improves the heat dissipation rate. A temperature sensor and control system work together to achieve intelligent temperature control, reducing energy waste. The detachable cooling module and sealing ring design facilitate maintenance, prevent leaks, and offer strong adaptability. The overall structure reduces core temperature fluctuations and thermal stress, improves casting accuracy and surface quality, extends mold life, and reduces production costs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the first overall structure of a precision die-casting mold core structure for rapid heat dissipation according to the present invention;

[0018] Figure 2 This is a schematic diagram of the second integral structure of a precision die-casting mold core structure for rapid heat dissipation according to the present invention;

[0019] Figure 3 This is a side view of the core structure of a precision die-casting mold with rapid heat dissipation according to the present invention.

[0020] Figure 4 This is a first perspective structural diagram of a precision die-casting mold core structure for rapid heat dissipation according to the present invention;

[0021] Figure 5 This is a second perspective view of the core structure of a precision die-casting mold for rapid heat dissipation according to the present invention.

[0022] Numbering on the map:

[0023] 1. Mold core body; 2. Spiral cooling channel; 3. Heat dissipation fins; 4. Cooling module; 5. Double-layer composite structure; 6. Inlet; 7. Cooling pipe; 8. Connector; 9. Outlet; 10. High thermal conductivity layer; 11. Heat-resistant layer; 12. Sealing ring; 13. Phase change material cavity; 14. Turbulence protrusion; 15. Temperature sensor. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] like Figure 1-5 As shown, this utility model provides a precision die-casting mold core structure for rapid heat dissipation, including a core body 1. The core body 1 has a spiral cooling channel 2 inside, with the inlet 6 and outlet 9 of the spiral cooling channel 2 located at both ends of the core body 1. The core body 1 has a temperature sensor 15 and at least one phase change material cavity 13 inside, with the phase change material cavity 13 located inside the spiral cooling channel 2 and filled with phase change material.

[0026] The core body 1 is a double-layer composite structure 5. The core body 1 includes an inner high thermal conductivity layer 10 and an outer heat-resistant layer 11. The high thermal conductivity layer 10 is made of copper alloy material, and the heat-resistant layer 11 is made of mold steel material. The high thermal conductivity layer 10 is completely wrapped inside the heat-resistant layer 11.

[0027] During the precision die casting process, the core body 1 generates a large amount of heat when it comes into contact with the high-temperature molten liquid. At this time, the inner high thermal conductivity layer 10 of the core body 1, thanks to the excellent thermal conductivity of copper alloy, quickly conducts the heat from the contact area to the entire inner layer; while the outer heat-resistant layer 11, with the high strength characteristics of mold steel, ensures that the core maintains structural stability under high temperature and high pressure conditions and avoids deformation.

[0028] After heat is conducted to the inner layer, the spiral cooling channel 2 begins to function. The external cooling system, through the cooling module 4 at the top of the mold core body 1, delivers coolant via cooling pipes 7 and connectors 8 to the inlet 6 of the spiral cooling channel 2. The coolant flows along the spiral path, and its spiral structure increases the contact area and contact time with the high thermal conductivity layer 10, enabling it to fully absorb heat. At the same time, the turbulence protrusions 14 on the inner wall of the channel create turbulence in the coolant, enhancing the convective heat transfer efficiency. The coolant, after absorbing heat, is discharged from the outlet 9, completing the initial heat transfer.

[0029] Surrounding the spiral cooling channel 2, an annular phase change material cavity 13 further assists in heat dissipation. When the local temperature of the mold core rises, the phase change material in the phase change material cavity 13 absorbs heat and undergoes a phase change (such as changing from solid to liquid), rapidly reducing the surrounding temperature through latent heat exchange; when the temperature drops, the phase change material releases heat and undergoes a reverse phase change, maintaining the mold core temperature stability and mitigating temperature fluctuations.

[0030] Furthermore, the heat dissipation fins 3 on the outer wall of the core body 1 increase the contact area with air, dissipating some heat to the surrounding environment through natural convection, thus supplementing the effects of liquid cooling and phase change heat dissipation. Temperature sensor 15 monitors the temperature between the spiral cooling channel 2 and the phase change material cavity 13 in real time and transmits the signal to an external control system. The system adjusts parameters such as coolant flow rate based on the temperature data to achieve precise temperature control. The detachable design of the cooling module 4 facilitates maintenance, while the sealing ring 12 prevents coolant leakage and ensures the stability of the cooling system.

[0031] Furthermore, the spiral cooling channel 2 has a spiral spacing of 5-10 mm and a channel diameter of 3-8 mm, and the axis of the spiral cooling channel 2 coincides with the axis of the mold core body 1. The parameters of the spiral cooling channel 2 (spiral spacing 5-10 mm, diameter 3-8 mm) have been optimized to ensure heat dissipation efficiency while avoiding excessively dense channels that could affect the strength of the mold core.

[0032] Furthermore, the phase change material cavity 13 has an annular structure, surrounding the spiral cooling channel 2, and the inner wall of the phase change material cavity 13 is spaced 2-5mm from the outer wall of the spiral cooling channel 2. This 2-5mm spacing between the phase change material cavity 13 and the cooling channel ensures that the phase change material can effectively absorb heat from the surrounding area while preventing mutual interference. The detachable cooling module 4 facilitates future maintenance and replacement, and the sealing ring 12 solves the coolant leakage problem, improving the practicality of the structure.

[0033] Furthermore, the top of the mold core body 1 is equipped with a detachable cooling module 4. The cooling module 4 includes a cooling pipe 7 and a connector 8. One end of the cooling pipe 7 is connected to the inlet 6 of the spiral cooling channel 2, and the other end is connected to an external cooling system via the connector 8. A sealing ring 12 is provided at the end of the connector 8, and the sealing ring 12 is nested at the inlet 6. The design of the detachable cooling module 4 facilitates maintenance and replacement, and the sealing ring 12 prevents coolant leakage, improving practicality.

[0034] Furthermore, multiple heat dissipation fins 3 are evenly distributed on the outer wall of the mold core body 1. The height of the heat dissipation fins 3 is 10-20mm, the thickness is 2-5mm, and the heat dissipation fins 3 are integrally formed with the mold core body 1. The heat dissipation fins 3 achieve heat dissipation through natural convection, reducing reliance on liquid cooling systems and further reducing energy consumption.

[0035] Furthermore, the temperature sensor 15 is located between the spiral cooling channel 2 and the phase change material cavity 13, and the signal output terminal of the temperature sensor 15 is connected to an external control system. The temperature sensor 15, in conjunction with the external control system, can adjust cooling parameters according to real-time temperature, avoiding energy waste caused by over-cooling and achieving intelligent temperature control.

[0036] Furthermore, the inner wall of the spiral cooling channel 2 is provided with turbulence protrusions 14. These turbulence protrusions 14 have a triangular structure and are evenly distributed along the axial direction of the spiral cooling channel 2. The mounting base design at the bottom of the mold core allows for easy connection with other parts of the mold, making it suitable for different types of die-casting equipment. The triangular structure of the turbulence protrusions 14 enhances the turbulence effect of the coolant, significantly improving heat exchange efficiency compared to traditional smooth channels, and its simple structure makes it easy to manufacture.

[0037] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A precision die casting mold core structure with fast heat dissipation, characterized in that: The device includes a mold core body, which has a spiral cooling channel inside. The inlet and outlet of the spiral cooling channel are located at the two ends of the mold core body, respectively. The mold core body also has a temperature sensor and at least one phase change material cavity inside. The phase change material cavity is located inside the spiral cooling channel and is filled with phase change material. The core body is a double-layer composite structure, comprising an inner high thermal conductivity layer and an outer heat-resistant layer. The high thermal conductivity layer is made of copper alloy, and the heat-resistant layer is made of mold steel. The high thermal conductivity layer is completely enclosed within the heat-resistant layer.

2. The precision die casting mold core structure of claim 1, wherein: The spiral cooling channel has a spiral spacing of 5-10mm and a channel diameter of 3-8mm, and the axis of the spiral cooling channel coincides with the axis of the mold core body.

3. The precision die casting mold core structure of fast heat dissipation according to claim 1, characterized in that: The phase change material cavity is an annular structure, arranged around a spiral cooling channel, and the inner wall of the phase change material cavity is spaced 2-5mm apart from the outer wall of the spiral cooling channel.

4. The precision die casting mold core structure of claim 1, wherein: The top of the mold core body is provided with a detachable cooling module. The cooling module includes a cooling pipe and a connector. One end of the cooling pipe is connected to the inlet of the spiral cooling channel, and the other end is connected to an external cooling system through the connector.

5. The precision die casting mold core structure of claim 4, wherein: The connector end is provided with a sealing ring, which is nested at the inlet.

6. The precision die casting mold core structure of claim 1, wherein: Multiple heat dissipation fins are evenly distributed on the outer side wall of the mold core body. The height of the heat dissipation fins is 10-20mm and the thickness is 2-5mm. The heat dissipation fins are integrally formed with the mold core body.

7. The precision die casting mold core structure of claim 1, wherein: The temperature sensor is located between the spiral cooling channel and the phase change material cavity, and the signal output terminal of the temperature sensor is connected to the external control system.

8. The precision die casting mold core structure of claim 1, wherein: The inner wall of the spiral cooling channel is provided with turbulence protrusions, which are triangular in structure and are evenly distributed along the axial direction of the spiral cooling channel.

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