Die-casting mould for a waterway housing

Abstract

The utility model provides a kind of die casting die of water channel shell belongs to mould technical field, include: upper die and lower die, upper die is provided with feed inlet and feed runner, lower die is provided with mould core and core-pulling assembly, upper die and lower die form cavity after moulding, feed inlet is communicated with cavity by feed runner, by reducing unnecessary bend and turbulent flow area in the flowing process of die casting alloy, the design significantly reduces the resistance and energy loss of metal liquid flow, so that die casting alloy in molten state can rapidly fill the entire cavity in more stable, continuous state, smooth filling path reduces the possibility that gas is rolled into metal flow or trapped in cavity dead angle, thereby significantly reduces the risk of forming blowhole, shrinkage cavity and other defects in casting.

Description

Technical Field

[0001] This utility model belongs to the field of mold technology and relates to a die-casting mold for a waterway shell. Background Technology

[0002] Water channel shells are important structural components widely used in automobiles, home appliances, industrial equipment and other fields. They usually have complex internal flow channels and multiple lateral holes to facilitate the conduction and distribution of coolant or working medium. However, in the current die casting mold technology, there are still many technical challenges for water channel shells with deep cavities, side holes or complex internal cavity structures. For example, complex cavities are prone to air trapping. If the venting is not smooth, it will lead to defects such as porosity and incomplete filling in the casting, affecting its sealing performance and mechanical strength.

[0003] In summary, the existing die-casting molds for waterway shells still have significant shortcomings and room for improvement in achieving high-quality internal forming of castings, especially in eliminating casting defects such as porosity and shrinkage cavities. Summary of the Invention

[0004] The purpose of this utility model is to address the aforementioned problems existing in the prior art by proposing a die-casting mold for a waterway shell, comprising: The upper mold is equipped with a feed inlet and a feed channel; The lower mold is provided with a mold core and a core pulling assembly. The core pulling assembly includes a sliding block and a core pulling driving element. The core pulling driving element is connected to the lower mold, and the sliding block is slidably connected to the lower mold. After the upper mold and the lower mold are closed, a cavity is formed, and the feed port is connected to the cavity through the feed channel; The mold core and the sliding block are provided with venting channels, and the mold core is also provided with a water nozzle overflow groove. The venting channels are connected to the cavity through the water nozzle overflow groove.

[0005] In the die-casting mold of the waterway shell described above, there are four core-pulling assemblies, which are located on the four sides of the lower mold. The core-pulling driving element can drive the sliding block to contact the mold core.

[0006] In the die-casting mold of the waterway shell described above, the lower mold is provided with an exhaust groove, one end of the exhaust channel is connected to the cavity, and the other end of the exhaust channel is connected to the exhaust groove.

[0007] In the die-casting mold of the waterway shell described above, the mold core and the sliding block are also provided with slag pocket grooves, and the exhaust channel is connected to the cavity through the slag pocket grooves.

[0008] In the die-casting mold of the water channel shell described above, the core-pulling assembly further includes a slider seat, and the slider block is connected to the output shaft of the core-pulling drive element through the slider seat.

[0009] The die-casting mold for a waterway shell described above also includes a locking block, which is connected to the upper mold. The slider seat is also provided with a locking buckle. When the upper mold and the lower mold are closed, the surface of the locking block contacts the inner surface of the locking buckle.

[0010] The die-casting mold for a water channel shell described above also includes a high-pressure water cooling channel, which is disposed in the upper mold and the lower mold.

[0011] In the die-casting mold of the water channel shell described above, the high-pressure water cooling channel is perpendicular to the mold core and is used for cooling the inner hole of the water nozzle column.

[0012] In the die-casting mold for a waterway shell described above, the upper mold is further provided with a casting sleeve, which is connected to the feed port.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. By reducing unnecessary bends and turbulent areas in the flow process of the die-casting alloy, this design significantly reduces the resistance and energy loss of the molten metal flow, allowing the molten die-casting alloy to fill the entire cavity more smoothly and continuously. The smooth filling path reduces the possibility of gas being drawn into the metal flow or trapped in dead corners of the cavity. The overflow groove of the nozzle column ensures that the molten metal in the nozzle column area can be filled smoothly, continuously and fully, significantly improving the density and internal quality of this key part, and ultimately achieving the high-quality goal of no pores inside the nozzle column.

[0014] 2. This multi-directional core-pulling structure design greatly expands the molding capability of the mold, enabling the die-casting mold to meet the needs of castings with more complex shapes and more unique structures. Especially for waterway shells or other similar castings with grooves, side holes, irregular curved surfaces or deep cavity structures, traditional single-sided or double-sided core-pulling methods are often difficult to meet their molding requirements. However, the four sets of core-pulling components work together from four directions, which can effectively achieve precise molding of these complex structures.

[0015] 3. This die-casting mold is mainly used for die-casting water channel shells. The water nozzle column, as a critical functional component of the water channel shell, has extremely strict requirements for the internal quality of the casting, especially the absence of defects such as porosity, air bubbles, and slag inclusions. This die-casting mold features a dedicated and targeted overflow groove for the water nozzle column in the mold core, ensuring that the molten metal in the water nozzle column area can be stably, continuously, and fully filled. This significantly improves the density and internal quality of this critical component, ultimately achieving the high-quality goal of a porosity-free water nozzle column. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the mold of this utility model.

[0017] Figure 2 This is a top view of the interior of the mold of this utility model.

[0018] Figure 3 for Figure 2 A magnified view of detail A.

[0019] Figure 4 This is a top view of the mold core of this utility model.

[0020] Figure 5 This is a cross-sectional view of the mold of this utility model.

[0021] In the picture: 1. Upper mold; 11. Inlet; 12. Inlet channel; 2. Lower mold; 21. Mold core; 211. Slag pocket groove; 212. Water nozzle overflow groove; 22. Core pulling assembly; 221. Sliding block; 222. Core pulling drive element; 223. Slider seat; 2231. Anti-lock; 23. Venting groove; 3. Cavity; 4. Venting channel; 5. Anti-lock block; 6. Casting sleeve. Detailed Implementation

[0022] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0023] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0024] Furthermore, in this utility model, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, features defined as "first" or "second" may explicitly or implicitly include at least one of those features. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly and specifically defined.

[0025] In this utility model, unless otherwise explicitly specified and limited, the terms "connection" and "fixation" should be interpreted broadly. For example, "fixation" can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0026] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0027] The specific embodiments described herein are merely illustrative examples of this utility model patent. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or adopt similar methods to replace them, but without departing from the patent of this utility model or exceeding the scope defined by the appended claims.

[0028] like Figures 1-5 As shown, a die-casting mold for a waterway shell includes an upper mold 1 and a lower mold 2.

[0029] The upper mold 1 is provided with a feed inlet 11 and a feed channel 12.

[0030] The lower mold 2 is provided with a mold core 21 and a core pulling assembly 22. The core pulling assembly 22 includes a sliding block 221 and a core pulling driving element 222. The core pulling driving element 222 is connected to the lower mold 2, and the sliding block 221 is slidably connected to the lower mold 2.

[0031] After the upper mold 1 and the lower mold 2 are closed, a cavity 3 is formed, and the feed port 11 is connected to the cavity 3 through the feed channel 12.

[0032] The mold core 21 and the sliding block 221 are provided with an exhaust channel 4. The mold core 21 is also provided with a water nozzle overflow groove 212. The exhaust channel 4 is connected to the cavity 3 through the water nozzle overflow groove 212.

[0033] Specifically, during the die casting process, the molten die casting alloy enters the mold through the inlet 11. The feed channel of the die casting mold has been optimized in its structural layout. The extension direction of the feed channel is basically on the same geometric plane as one side of the outer surface of the final water channel shell. This makes the path of the molten die casting alloy from the inlet 11 to the mold cavity 3 more direct and smooth, effectively avoiding the complex flow channel structure such as multi-angle turns or vertical bends commonly found in traditional designs. The mold core is equipped with an exhaust channel 4 and a water nozzle overflow groove 212. The water nozzle overflow groove 212 is connected to the exhaust channel 4, and the water nozzle overflow groove 4 is set as a cuboid. One side of it is connected to the water nozzle column forming part of the water channel shell. Impurities generated by the molten metal entering the cavity 3 enter the water nozzle overflow groove 212 through the connection.

[0034] In this embodiment, by reducing unnecessary bends and turbulent areas in the flow process of the die-casting alloy, the design significantly reduces the resistance and energy loss of the molten metal flow, enabling the molten die-casting alloy to quickly fill the entire cavity 3 in a more stable and continuous manner. The smooth filling path reduces the possibility of gas being drawn into the metal flow or trapped in dead corners of the cavity 3. The overflow groove 212 of the nozzle column ensures that the molten metal in the nozzle column area can be filled smoothly, continuously, and fully, significantly improving the density and internal quality of this key part, and ultimately achieving the high-quality goal of no pores inside the nozzle column.

[0035] like Figures 1-5 As shown, based on the above embodiment, the number of core-pulling components 22 is four, and the four core-pulling components 22 are located on the four sides of the lower mold 2. The core-pulling driving element 222 can drive the sliding block 221 to contact the mold core 21.

[0036] Specifically, the die-casting mold is equipped with four sets of core-pulling components 22, which converge and close together from four different directions of the mold to the central core 21. These four sets of core-pulling components 22 are coordinated and cooperate with each other in structural design, and can accurately connect when the mold is closed to jointly build a complete and highly compact molded bottom surface.

[0037] In this embodiment, the multi-directional core-pulling structure design greatly expands the molding capability of the mold, enabling the die-casting mold to meet the needs of castings with more complex shapes and more unique structures. In particular, for waterway shells or other similar castings with grooves, side holes, irregular curved surfaces or deep cavity structures, traditional single-sided or double-sided core-pulling methods are often difficult to meet their molding requirements. However, the four sets of core-pulling components 22 work together from four directions, which can effectively achieve precise molding of these complex structures.

[0038] like Figures 1-5As shown, based on the above embodiment, the lower mold 2 is provided with an exhaust groove 23, one end of the exhaust channel 4 is connected to the cavity 3, and the other end of the exhaust channel 4 is connected to the exhaust groove 23.

[0039] Specifically, the die-casting mold structure is provided with a specially designed exhaust channel 4. One end of the exhaust channel 4 is connected to the cavity 3, and the other end is connected to the exhaust groove 23 outside the mold, thus forming a complete exhaust path. It can guide the air inside the cavity 3 to the direction of the exhaust groove 23 in a timely manner, so that the air can be smoothly discharged to the outside of the mold along the exhaust channel 4.

[0040] In this embodiment, the design of the exhaust channel 4 and the exhaust groove 23 not only effectively reduces the air resistance caused by air retention in the cavity 3, but also significantly reduces casting defects such as bubbles, pores, and insufficient filling caused by the inability to expel air in time. Especially in the molding process of complex structures or thin-walled areas, a good exhaust system helps the molten metal to fully fill every detail of the cavity 3, thereby improving the density and surface quality of the casting.

[0041] like Figures 1-5 As shown, based on the above embodiment, the mold core 21 and the sliding block 221 are also provided with slag-filling grooves 211, and the exhaust channel 4 is connected to the cavity 3 through the slag-filling grooves 211.

[0042] Specifically, when the molten die-casting alloy enters the cavity 3, it may carry some gas and impurities, which may cause porosity and impurities inside the casting, affecting the mechanical properties and appearance quality of the casting. The slag-filling groove 211 on the mold core 21 and the sliding block 221 can be used to guide the die-casting alloy with impurities to the slag-filling groove 211, effectively improving the quality of the casting.

[0043] In this embodiment, the slag trough 211 forms a local low-pressure or slow-flow zone through a reasonable geometric shape and positional layout, so that the molten metal carrying gas and impurities preferentially fills this area and is isolated and stored, thereby preventing it from entering the main cavity 3 or key functional parts.

[0044] like Figures 1-5 As shown, based on the above embodiment, the core-pulling assembly 22 further includes a slider seat 223, and the sliding block 221 is connected to the output shaft of the core-pulling drive element 222 through the slider seat 223.

[0045] Specifically, the sliding block 221, as a key component directly involved in mold forming, needs to reciprocate frequently under high temperature and high pressure during operation, and endure severe thermal shock and mechanical friction. Therefore, the sliding block 221 is usually made of special materials with excellent thermal fatigue resistance, good wear resistance, and high strength and toughness. In contrast, the slider seat 223, as an intermediate connecting part between the sliding block 221 and the output shaft of the core pulling drive element 222, has a relatively mild working environment and does not directly contact the high temperature molten die-cast alloy. Therefore, the slider seat 223 is usually made of materials that are lightweight, have good machinability, and are low in cost.

[0046] In this embodiment, the use of a lightweight material for the slider seat 223 not only helps to reduce the weight of the entire core-pulling mechanism, reduce motion inertia, improve response speed and running stability, but also helps to control the overall manufacturing cost of the mold.

[0047] like Figures 1-5 As shown, based on the above embodiment, it also includes a locking block 5, which is connected to the upper mold 1. The slider seat 223 is also provided with a locking buckle 2231. When the upper mold 1 and the lower mold 2 are closed, the surface of the locking block 5 contacts the inner surface of the locking buckle 2231.

[0048] Specifically, the anti-locking block 5 is fixedly connected to the upper mold 1. Its structural design matches the anti-locking buckle 2231 on the slider seat 223. When the die-casting mold performs the mold closing operation, the upper mold 1 and the lower mold 2 gradually close, and the anti-locking block 5 is precisely embedded in the anti-locking buckle 2231 structure on the slider seat 223, forming a stable mechanical engagement relationship.

[0049] In this embodiment, the tight fit between the anti-locking block 5 and the anti-locking buckle 2231 can be further compressed under the action of injection pressure, forming a self-reinforcing reverse locking force. As the injection pressure increases, the contact surface pressure between the anti-locking block 5 and the anti-locking buckle 2231 also increases, making the structure of the entire core-pulling area more stable and effectively suppressing the slight displacement or loosening of the slider or core-pulling assembly 22 under high pressure.

[0050] like Figures 1-5 As shown, based on the above embodiment, a high-pressure water cooling channel is also included, which is disposed in the upper mold 1 and the lower mold 2.

[0051] In this embodiment, the introduction of circulating cooling water into the high-pressure water cooling channel can remove the heat from the molten die-casting alloy, which not only significantly shortens the die-casting cycle and improves production efficiency, but also significantly extends the service life of the mold and reduces maintenance costs.

[0052] like Figures 1-5As shown, based on the above implementation method, the high-pressure water cooling channel is perpendicular to the mold core 21 and is used for cooling the inner hole of the water nozzle column.

[0053] Specifically, the high-pressure water cooling channel is perpendicular to the mold core 21, forming a localized enhanced cooling system for this critical part. As the core functional structure on the water channel shell, if the water nozzle column is not cooled in time, it is very easy to cause the solidification speed of this part to slow down, resulting in defects such as internal shrinkage, pores or thermal stress cracking, which seriously affects its sealing performance and structural strength.

[0054] In this embodiment, the high-pressure cooling channel can pass through the inner hole of the water nozzle column, and can quickly absorb and remove a large amount of heat conducted by the mold material near the water nozzle column and its slag pack 211, significantly accelerating the heat dissipation rate in this area, and achieving directional and efficient cooling of the water nozzle column forming part.

[0055] like Figures 1-5 As shown, based on the above embodiment, the upper mold 1 is also provided with a casting sleeve, which is connected to the feed port 11.

[0056] In this embodiment, the casting sleeve 6 is installed inside the feed port 11 of the upper mold 1. When the die casting cycle begins, the molten die casting alloy is sprayed into the casting sleeve by the die casting machine, and then smoothly introduced into the mold through the feed port 11, and finally filled into the cavity 3. The casting sleeve 6 can effectively protect the upper mold 1 body and prevent the high temperature molten metal from directly impacting the mold base, thereby extending the overall service life of the mold.

Claims

1. A die-casting mold for a waterway shell, characterized in that, include: The upper mold is equipped with a feed inlet and a feed channel; The lower mold is provided with a mold core and a core pulling assembly. The core pulling assembly includes a sliding block and a core pulling driving element. The core pulling driving element is connected to the lower mold, and the sliding block is slidably connected to the lower mold. After the upper mold and the lower mold are closed, a cavity is formed, and the feed port is connected to the cavity through the feed channel; The mold core and the sliding block are provided with venting channels, and the mold core is also provided with a water nozzle overflow groove. The venting channels are connected to the cavity through the water nozzle overflow groove.

2. The die-casting mold for a waterway shell as described in claim 1, characterized in that: The number of core-pulling components is four, and the four core-pulling components are located on the four sides of the lower mold. The core-pulling driving element can drive the sliding block to contact the mold core.

3. The die-casting mold for a waterway shell as described in claim 1, characterized in that: The lower mold is provided with an exhaust groove, one end of the exhaust channel is connected to the cavity, and the other end of the exhaust channel is connected to the exhaust groove.

4. The die-casting mold for a waterway shell as described in claim 3, characterized in that: The mold core and the sliding block are also provided with slag pockets, and the venting channel is connected to the cavity through the slag pockets.

5. The die-casting mold for a waterway shell as described in claim 1, characterized in that: The core-pulling assembly also includes a slider seat, and the slider is connected to the output shaft of the core-pulling drive element through the slider seat.

6. The die-casting mold for a waterway shell as described in claim 5, characterized in that: It also includes a locking block, which is connected to the upper mold. The slider seat is also provided with a locking buckle. When the upper mold and the lower mold are closed, the surface of the locking block contacts the inner surface of the locking buckle.

7. The die-casting mold for a waterway shell as described in claim 1, characterized in that: It also includes a high-pressure water cooling channel, which is disposed in the upper mold and the lower mold.

8. The die-casting mold for a waterway shell as described in claim 7, characterized in that: The high-pressure water cooling channel is perpendicular to the mold core and is used for cooling the inner hole of the water nozzle column.

9. The die-casting mold for a waterway shell as described in claim 1, characterized in that: The upper mold is also provided with a casting sleeve, which is connected to the feed port.

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