Metal mold casting mold with upper mold having water cooling structure

Abstract

The utility model discloses a metal type foundry mould with upper die has water cooling structure belongs to metal type foundry mould field, including the mould and water cooling ring structure by bottom die and upper die are formed, the upper die includes upper die main part, the part that needs to carry out cooling in the upper die main part is provided with water cooling ring structure, the water cooling ring structure includes the annular water cooling tank of being arranged in the upper die main part and the water cooling upper ring of being covered in the annular water cooling tank top and with the upper die main part is connected as an organic whole, the utility model discloses the part that needs annular cooling is designed as the upper die main part independently, the rest part adopts the inlay block combination, realizes the accurate cooling of local area and does not influence the whole, through setting up the annular water cooling tank in the upper die main part and is equipped with the water cooling upper ring, constitutes the closed cooling water channel, makes the cooling water complete circulation, realizes the annular cooling of even stable of specified area, this structure has promoted the product forming quality, avoided the leakage risk of traditional welding water cooling ring.

Description

Technical Field

[0001] This utility model relates to the field of metal mold casting technology, and in particular to a metal mold casting mold with a water-cooling structure in the upper mold. Background Technology

[0002] Metal mold casting is a process that uses metal molds to form molten metal. The design of its cooling system directly affects the quality of the casting, production efficiency, and operational safety. During mold cooling, targeted cooling of localized high-temperature areas of the casting is typically required to control the solidification process, reduce defects, and improve production efficiency. Cooling methods mainly include point cooling, localized insert cooling, and through-hole water cooling structures. Water cooling systems are often placed in areas less sensitive to leakage risks, such as the bottom mold or side molds. However, for critical components such as the upper mold, especially in scenarios requiring circumferential cooling, the structural design and leakage prevention requirements are particularly stringent. Especially in low-pressure casting, leakage of cooling water can lead to contact between molten aluminum and an explosion, seriously threatening production safety.

[0003] Currently, cooling methods for metal molds mainly rely on point cooling and small-scale localized cooling. Common techniques include embedding point cooling pipes in the mold, or machining inlet, outlet, and through holes using inserts, and sealing one end by plugging or welding to form a localized circulating water channel. These structures are mostly used in bottom or side molds because leakage has a relatively small impact on the production process. However, for the ring-shaped cooling requirement of the upper mold, existing technologies lack mature solutions. Occasionally, a split water-cooling ring structure has been attempted, which combines and welds together an upper and lower water-cooling ring to form a ring-shaped water-cooling groove, and then fixes it to the mold body with bolts. Although this structure can theoretically achieve ring-shaped cooling, it depends on the welding process and has insufficient structural stability.

[0004] The existing annular cooling structure for the upper mold has significant drawbacks: First, the upper and lower parts of the water-cooling ring are connected by welding. Under the long-term high temperature and cyclic thermal stress of the mold, the weld is prone to cracking, causing cooling water to leak from the water-cooling tank. Leaking water may flow into the mold cavity, especially in low-pressure casting, where it may come into contact with the molten aluminum below, potentially causing serious safety accidents such as explosions. Second, once the weld cracks, the annular cooling effect fails, leading to localized temperature runaway in the mold, affecting the uniformity of casting solidification and the quality of the finished product. Furthermore, the existing welded structure is difficult to maintain and has low reliability, failing to meet the high standards of sealing and safety required for low-pressure casting, thus limiting the application of annular cooling technology in high-risk scenarios. Utility Model Content

[0005] The technical problem this utility model aims to solve is to provide a metal casting mold with a water-cooling structure in the upper mold. The part requiring annular cooling is independently designed as the upper mold body, while the remaining parts are combined with inserts to achieve precise cooling of local areas without affecting the overall structure. By setting an annular water-cooling groove in the upper mold body and equipping it with a water-cooling upper ring, a closed cooling water channel is formed, allowing the cooling water to circulate completely and achieving uniform and stable annular cooling of the designated area. This structure improves the product molding quality and avoids the leakage risk of traditional welded water-cooling rings.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: A metal casting mold with a water-cooled upper mold includes a mold consisting of a bottom mold and an upper mold, and a water-cooling ring structure. The upper mold includes an upper mold body, and the parts of the upper mold body that need to be cooled are provided with a water-cooling ring structure. The water-cooling ring structure includes an annular water-cooling groove formed in the upper mold body and a water-cooling upper ring that covers the annular water-cooling groove and is integrally connected to the upper mold body.

[0007] A further improvement of this utility model is that inserts are set in areas where cooling is not required.

[0008] A further improvement of the present invention is that the insert includes an outer insert of the upper mold body and an intermediate insert of the upper mold body.

[0009] A further improvement of this utility model is that: the upper ring of the water cooling system is provided with an inlet for an external cooling water inlet pipe and an outlet for an external cooling water outlet pipe; the annular water cooling tank is provided with a baffle to separate the water flow path between the inlet and the outlet.

[0010] A further improvement of this utility model is that the partition and the upper mold body are integrally formed.

[0011] A further improvement of this utility model is that the water-cooled upper ring is embedded in the annular water-cooled groove, and the two sides of the water-cooled upper ring are welded to the upper mold body by full welding to form a circumferential weld.

[0012] A further improvement of this utility model is that: the upper surface of the water-cooled upper ring is lower than the upper surface of the upper mold body, an overflow groove is formed on the upper surface of the water-cooled upper ring, and an overflow port communicating with the overflow groove is opened on the upper surface of the upper mold body to guide possible leakage water to the outside of the mold.

[0013] A further improvement of this utility model is that: the water-cooling upper ring has a cross-shaped cross-section ring structure, and its lower end shape matches the annular water-cooling groove; the upper end of the water-cooling upper ring divides the overflow groove into an inner overflow groove and an outer overflow groove; an overflow channel is provided between the inner overflow groove and the outer overflow groove.

[0014] A further improvement of this utility model is that the overflow port is located at the lowest position on the upper mold body.

[0015] The technological advancements achieved by this utility model due to the adoption of the above technical solution are as follows: 1. This utility model forms a closed, integrated, and highly efficient cooling channel by opening an annular water-cooling groove in the key parts requiring cooling inside the upper mold body and covering it with a water-cooling upper ring. This achieves directional and forced cooling of specific high-temperature areas of the mold (usually the top of the cavity or hot spots), significantly accelerating the solidification speed of these areas. This is beneficial for refining the casting grains, improving mechanical properties, shortening the overall casting cycle, and increasing production efficiency. By directly embedding the cooling system inside the mold body, compared to external cooling pipes, space is saved, the mold structure is made more compact, and interference problems that may be caused by external pipes are avoided. The annular water channel design allows the cooling water to flow around the hot area, providing a relatively uniform cooling effect, which helps to reduce casting defects (such as shrinkage cavities, porosity, and hot cracks) and internal stress caused by uneven cooling.

[0016] 2. This utility model uses inserts in non-critical cooling areas or vulnerable parts, so that only the inserts need to be replaced after they wear out or are damaged, without replacing the entire upper mold body, which greatly reduces maintenance costs and difficulty. The upper mold body can be made of materials with good comprehensive performance, while the inserts can be made of more suitable materials according to the functional requirements of their specific locations (such as wear resistance and heat resistance), so as to achieve optimized material configuration and cost control. By replacing inserts of different shapes or sizes, it can adapt to changes in product structure to a certain extent, improving the versatility and flexibility of the mold.

[0017] 3. This utility model divides the insert into an outer insert and an inner insert, clearly defining the division between the cooling area (the area where the water cooling ring is located) and the non-cooling area (the outer and inner insert areas), making the cooling design objectives clearer; the upper mold structure is modularized into a main cooling area and a replaceable insert area (peripheral and central), simplifying the manufacturing, assembly and maintenance process; the inner insert is especially often used to handle complex structural areas such as deep cavities or ejector pin holes in molds.

[0018] 4. This utility model has clearly defined inlet and outlet water inlets, which facilitates connection to an external cooling system and enables the circulation of cooling water. The internal baffle structure forces the cooling water to flow around the annular water cooling tank in a full circle (or along a designated long path), rather than flowing directly from the inlet to the outlet via a short circuit. By extending the flow path and time of the cooling water in the hot zone, the cooling water can fully absorb the heat from the mold, greatly improving the heat exchange efficiency and the uniformity of the cooling effect.

[0019] 5. This utility model integrates the partition with the upper mold body, resulting in better mechanical strength. It avoids problems such as assembly gaps, loosening, or poor sealing that may occur when the partition is inserted as a separate part. It fundamentally eliminates the risk of cooling water leakage at the partition and improves the sealing reliability and service life of the cooling system.

[0020] 6. In this utility model, the water-cooled upper ring is fully welded on both sides after being embedded in the upper mold body. The "full welding" (i.e., continuous and complete weld seam) ensures that the connection between the water-cooled upper ring and the upper mold body is completely filled with solder, forming a high-strength and high-sealing permanent connection. It can effectively withstand the water pressure of the cooling water and prevent the cooling water from leaking from the joint surface into the mold cavity or other parts. Its reliability is far higher than that of the sealing ring or local spot welding.

[0021] 7. This utility model, through the unique design of the overflow trough and overflow outlet structure, ensures that when the internal water channel leaks due to some reason (such as weld cracking), the cooling water will first overflow into the pre-designed overflow trough, and then be guided to the outside of the mold through the overflow outlet. This effectively prevents the risk of explosion ("backfire") that may be caused by high-temperature cooling water seeping into the mold cavity and coming into contact with high-temperature molten metal. It also avoids water leakage onto the equipment causing corrosion or electrical failure. Operators can also promptly detect and deal with problems by observing whether water is flowing out of the overflow outlet.

[0022] 8. The water-cooling upper ring of this utility model adopts a cross-shaped cross-section ring structure, with its lower end matching the annular water-cooling tank. It can be naturally inserted and automatically centered without complex tooling or repeated adjustments, ensuring that the width of the inner and outer overflow tanks is consistent. It has high installation accuracy, is simple to operate, and is not easily displaced during welding. The cross-shaped cross-section has strong resistance to bending and torsion, and is not easily deformed during hoisting and transportation. After welding, it becomes a rigid support ring connecting the inner and outer structures, improving overall stability and load-bearing capacity. Only two annular welds are required, resulting in low heat input and deformation risk. The overflow tank is naturally divided into inner and outer sides, allowing for preliminary identification of the fault location in case of leakage. All leaked water is discharged through a common overflow port. This structure significantly reduces positioning, welding, and inspection time, simplifies the assembly and welding process, reduces the number of parts and welds, has good rigidity and structural stability, and is low in cost and durable.

[0023] 9. This utility model places the overflow outlet at the lowest point, conforming to the principle that liquids naturally flow to lower places due to gravity. This ensures that leaked water accumulated in the overflow tank can be completely and smoothly drained without residue, preventing water leakage due to gravity. Water accumulation can affect sealing tests or cause secondary damage. 10. This utility model has a simple and reliable structure, is easy to maintain, has a long service life, and can significantly reduce equipment maintenance costs and production downtime. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of a metal casting mold structure with a ring-shaped water-cooling structure provided in an embodiment of this utility model; Figure 2 This is a partial top view of the water-cooled upper ring welded to the upper mold body according to an embodiment of this utility model; The components are as follows: 1. Upper mold body; 2. Upper mold outer insert; 3. Upper mold middle insert; 4. Annular water cooling tank; 5. Water cooling upper ring; 6. Weld; 7. Water inlet; 8. Water outlet; 9. Outer overflow tank; 10. Inner overflow tank; 11. Overflow channel; 12. Overflow outlet; 13. Partition; 14. Bottom mold; 15. Cavity. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments: like Figure 1 As shown, a metal casting mold with a water-cooled upper mold includes a mold composed of a bottom mold 14 and an upper mold and a water-cooling ring structure. The cavity between the upper mold and the bottom mold 14 is a cavity 15. The upper mold includes an upper mold body 1. The parts of the upper mold body 1 that need to be cooled are provided with a water-cooling ring structure. The water-cooling ring structure includes an annular water-cooling groove 4 opened in the upper mold body 1 and a water-cooling upper ring 5 that covers the annular water-cooling groove 4 and is integrated with the upper mold body 1.

[0026] Furthermore, inserts are installed in areas where cooling is not required. Only the inserts need to be replaced when they wear out or become damaged, eliminating the need to replace the entire upper mold body, significantly reducing maintenance costs and complexity.

[0027] Furthermore, the insert includes an outer upper mold insert 2 assembled on the outside of the upper mold body 1 and an intermediate upper mold insert 3 assembled in the middle of the upper mold body 1. The outer upper mold insert 2 and the intermediate upper mold insert 3 are fixed to the upper mold body 1 by bolt connection.

[0028] Furthermore, such as Figure 2 As shown, the upper ring 5 of the water cooling system is provided with an inlet 7 for an external cooling water inlet pipe and an outlet 8 for an external cooling water outlet pipe; the annular water cooling tank 4 is provided with a baffle 13 inside to separate the water flow path between the inlet 7 and the outlet 8.

[0029] Furthermore, the partition 13 and the upper mold body 1 are integrally formed.

[0030] Furthermore, such as Figure 1 As shown, the water-cooled upper ring 5 is embedded on the annular water-cooled groove 4, and the two sides of the water-cooled upper ring 5 are welded to the upper mold body 1 by full welding to form a surrounding weld 6.

[0031] Furthermore, such as Figure 1 As shown, the upper surface of the water-cooled upper ring 5 is lower than the upper surface of the upper mold body 1, and an overflow groove is formed on the upper surface of the water-cooled upper ring 5. The upper surface of the upper mold body 1 also has an overflow port 12 that communicates with the overflow groove to guide possible leakage water to outside the mold.

[0032] Furthermore, such as Figure 1 ,like Figure 2 As shown, the water-cooled upper ring 5 has a cross-shaped cross-section ring structure, and its lower end shape matches the annular water-cooling tank 4; the upper end of the water-cooled upper ring 5 divides the overflow tank into an inner overflow tank 9 and an outer overflow tank 10; an overflow channel 11 is provided between the inner overflow tank 9 and the outer overflow tank 10.

[0033] Furthermore, such as Figure 2 As shown, the overflow port 12 is located at the lowest position on the upper mold body 1.

[0034] During normal mold operation, cooling water enters through inlet 7, circulates within the annular water-cooling tank 4, and then exits through outlet 8, achieving annular cooling of specific areas of the mold. When a crack appears in the weld 6 between the upper water-cooling ring 5 and the upper mold body 1, causing leakage, the leaked water will drain to the outside of the mold through overflow outlet 12, preventing water from flowing into the cavity 15 or the molten aluminum. Overflow outlet 12 serves as a leakage monitoring and protection mechanism.

[0035] In summary, this invention separates the part of the mold that requires annular cooling into a single upper mold section, while the remaining structures of the upper mold are made into inserts that are mounted on the upper mold body. This structure can achieve localized cooling of the mold without affecting other parts of the upper mold, thus achieving localized cooling while facilitating maintenance and replacement. This structure ensures that even if the weld fails and cracks and leaks, localized annular cooling of the mold can still be achieved, ensuring safe production and preventing product molding from being affected. This effectively solves the problems existing in the prior art.

Claims

1. A metal casting mold with a water-cooled upper mold, comprising a mold and a water-cooling ring structure consisting of a bottom mold (14) and an upper mold, characterized in that: The upper mold includes an upper mold body (1), and a water cooling ring structure is provided in the part of the upper mold body (1) that needs to be cooled. The water cooling ring structure includes an annular water cooling groove (4) opened in the upper mold body (1) and a water cooling upper ring (5) that is connected to the upper mold body (1) and covers the annular water cooling groove (4).

2. A metal casting mold with a water-cooled upper mold according to claim 1, characterized in that: Install inserts in areas where cooling is not required.

3. A metal casting mold with a water-cooled upper mold according to claim 2, characterized in that: The inserts include an outer upper mold insert (2) assembled on the outside of the upper mold body (1) and an intermediate upper mold insert (3) assembled in the middle of the upper mold body (1).

4. A metal casting mold with a water-cooled upper mold according to claim 1, characterized in that: The water-cooled upper ring (5) is provided with an inlet (7) for an external cooling water inlet pipe and an outlet (8) for an external cooling water outlet pipe; the annular water-cooled tank (4) is provided with a baffle (13) inside to separate the water flow path between the inlet (7) and the outlet (8).

5. A metal casting mold with a water-cooled upper mold according to claim 4, characterized in that: The partition (13) and the upper mold body (1) are integrally formed.

6. A metal casting mold with a water-cooled upper mold according to claim 1, characterized in that: The water-cooled upper ring (5) is embedded on the annular water-cooled groove (4), and the two sides of the water-cooled upper ring (5) are welded to the upper mold body (1) by full welding to form a surrounding weld (6).

7. A metal casting mold with a water-cooled upper mold according to claim 6, characterized in that: The upper surface of the water-cooled upper ring (5) is lower than the upper surface of the upper mold body (1), and an overflow groove is formed on the upper surface of the water-cooled upper ring (5). The upper surface of the upper mold body (1) is also provided with an overflow port (12) that communicates with the overflow groove to guide possible leakage to the outside of the mold.

8. A metal casting mold with a water-cooled upper mold according to claim 7, characterized in that: The water-cooled upper ring (5) has a cross-shaped cross-section ring structure, and its lower end shape matches the annular water-cooled tank (4); the upper end of the water-cooled upper ring (5) divides the overflow tank into an inner overflow tank (9) and an outer overflow tank (10); an overflow channel (11) is provided between the inner overflow tank (9) and the outer overflow tank (10).

9. A metal casting mold with a water-cooled upper mold according to claim 7 or 8, characterized in that: The overflow outlet (12) is located at the lowest position on the upper mold body (1).

Images