A radiator die casting mold

Abstract

This application relates to a radiator die-casting mold, belonging to the field of die-casting molding technology. The radiator die-casting mold includes a mold body, a liquid inlet, an overflow well, and a flow guiding assembly. The mold body has a molding cavity inside. The liquid inlet and overflow well are respectively located on opposite sides of the molding cavity and communicate with it. The flow guiding assembly is located inside the overflow well. The flow guiding assembly includes a flow guiding wall and a central venting channel. The flow guiding wall spirals from the outside to the inside to form a spiral flow channel, and the inlet of the spiral flow channel is connected to the inlet of the overflow well. The opening at one end of the central venting channel is located at the top of the center of the spiral flow channel. The spiral flow channel guides the molding liquid flowing from the molding cavity into the overflow well along a spiral trajectory to the central venting channel. During the filling process of the molding liquid, the central venting channel discharges the gas in the overflow well from the top of the center of the spiral flow channel to the outside of the mold body. The radiator die-casting mold provided in this application can guide the flow of molding liquid in the overflow well and prevent impurities from flowing back.

Description

Technical Field

[0001] This application relates to the field of die casting technology, and more specifically, to a radiator die casting mold. Background Technology

[0002] In die casting technology, radiators, as a common heat dissipation element, typically consist of numerous dense, thin-walled heat dissipation fins. This results in an extremely complex, narrow, and deep network of flow channels within the die-casting mold cavity. During the die casting process, molten molding liquid (such as aluminum alloy or zinc alloy) is injected into the cavity at high speed. However, due to the complex geometry of the cavity, the molten molding liquid fills these narrow channels with a high flow rate and large specific surface area, causing the leading edge to cool rapidly and form oxide scale. This oxide scale is then broken into tiny solid inclusions by the subsequent liquid flow. The molding liquid easily carries away impurities such as gas, oxide scale, and debris. If these impurities are not removed in time, they will remain inside the casting, leading to defects such as porosity and shrinkage, severely affecting the mechanical strength, thermal conductivity, and service life of the radiator.

[0003] To collect excess molding fluid and impurities, conventional die-casting molds typically include an overflow well (also known as a slag pocket). However, traditional overflow wells are simply designed cavities connected to the molding cavity, lacking effective flow control and venting mechanisms. During the molding fluid filling process, debris and impurities in the overflow well are easily carried back into the molding cavity by the turbulent or backflowing motion of the molding fluid. These backflowing impurities most often accumulate in the area near the overflow well inlet. Since this area is the end of the filling process, the molding fluid pressure and temperature are already low, and the accumulation of impurities further worsens the feeding conditions in this area, leading to defects such as porosity and voids inside the molded part, severely reducing its density, mechanical strength, and the thermal conductivity of the radiator. Therefore, there is an urgent need for a new type of die-casting mold that can effectively prevent the backflow of impurities. Summary of the Invention

[0004] The purpose of this application is to provide a radiator die-casting mold that can guide the flow of molding liquid in the overflow well and prevent impurities from flowing back, thereby improving the above-mentioned problems.

[0005] This application is achieved through the following technical solution: This application provides a radiator die-casting mold, which includes a mold body, a liquid inlet, an overflow well, and a flow guiding assembly. The mold body has a molding cavity for forming the radiator. The liquid inlet and the overflow well are respectively located on opposite sides of the molding cavity and communicate with the molding cavity. The flow guiding assembly is located inside the overflow well. The flow guiding assembly includes a flow guiding wall and a central exhaust channel. The flow guiding wall spirals from the outside to the inside to form a spiral flow channel, and the inlet of the spiral flow channel is connected to the inlet of the overflow well. The opening at one end of the central exhaust channel is located at the top of the center of the spiral flow channel. The spiral flow channel is configured to guide the molding liquid flowing from the molding cavity into the overflow well along a spiral trajectory to the central exhaust channel. The central exhaust channel is configured to discharge the gas in the overflow well from the top of the center of the spiral flow channel to the outside of the mold body during the filling process of the molding liquid.

[0006] In the technical solution of this application embodiment, the spiral flow channel guides the molding liquid to flow along the spiral trajectory, increasing the flow path and backflow resistance of the molding liquid, reducing the risk of turbulence and backflow, and confining impurities inside the overflow well, preventing them from re-entering the molding cavity, thereby preventing impurity backflow; the connection between the central exhaust channel and the spiral flow channel is located at the top center of the spiral flow channel, using the centrifugal effect of the swirling flow to collect and discharge gas in a timely manner, reducing porosity defects and improving the density of the casting; the flow guiding component provided in this application reduces impurity accumulation and poor feeding at the end of the molding cavity (near the overflow well inlet area) by controlling the flow and exhaust of the molding liquid, thereby improving the mechanical strength, thermal conductivity and service life of the radiator.

[0007] In some embodiments, the upper and lower ends of the guide wall are respectively sealed and abutted against the top and bottom walls of the overflow well.

[0008] In the technical solution of this application embodiment, the sealing abutment structure eliminates possible leakage or bypass flow path, ensuring that all molding liquid entering the overflow well must undergo a complete spiral flow process, enhancing the centrifugal separation effect and ensuring the integrity of the flow path; the sealing abutment structure ensures that gas can only be discharged through the central exhaust channel, avoiding gas from escaping from the edge of the guide wall and interfering with the normal exhaust process, making the exhaust more concentrated and efficient, and enhancing the exhaust stability.

[0009] In some embodiments, the flow guiding assembly further includes a positioning sleeve; the positioning sleeve is sleeved on the outside of the flow guiding wall and is fixedly connected to the flow guiding wall; the outer wall of the positioning sleeve fits against the inner wall of the overflow well to fix the position of the flow guiding assembly.

[0010] In the technical solution of this application embodiment, the guide component is fixed by a positioning sleeve, which prevents the guide wall from shifting or vibrating under the impact of high-speed liquid flow, ensuring the stability of the shape and size of the spiral flow channel, so that the molding liquid always flows along the designed spiral trajectory. The stable spiral flow channel ensures the uniformity and consistency of the centrifugal force field, making the separation effect of impurities such as oxide scale more reliable and predictable. The positioning sleeve also disperses the liquid flow impact force, reduces the stress directly borne by the guide wall, reduces the risk of fatigue damage, and extends the service life of the guide component.

[0011] In some embodiments, a gap is left between the positioning sleeve and the outermost layer of the guide wall, so that this part of the guide wall can undergo elastic deformation towards the positioning sleeve under the impact of the molding liquid.

[0012] In the technical solution of this application embodiment, the elastic deformation of the guide wall absorbs the high-speed impact energy of the molding fluid, reduces the instantaneous impact load on the guide component, and significantly improves the durability of the structure. When the molding fluid pressure fluctuates, the guide wall automatically fine-tunes the flow cross section of the spiral flow channel through elastic deformation, playing a natural pressure stabilizing role and making the spiral flow more stable. By releasing stress through elastic deformation, the guide wall is prevented from plastic deformation or fracture under repeated impacts, thus extending the service life of the mold.

[0013] In some embodiments, an anti-jetting mechanism is also included; the anti-jetting mechanism has an exhaust channel and a cooling channel inside; one end of the exhaust channel is connected to the outlet of the central exhaust channel, and the other end extends to the outside of the mold body; the cooling channel is located adjacent to the exhaust channel, and the two are not connected to each other; the cooling channel is used for the flow of cooling medium.

[0014] In the technical solution of this application embodiment, the anti-jet mechanism provided by this application rapidly cools the molding liquid entering the exhaust channel, causing it to solidify into a solid state before reaching the exhaust channel outlet. This eliminates the safety hazard of high-temperature molten metal spraying out and injuring people, and avoids safety accidents such as burns and fires that may be caused by the accidental spraying of high-temperature molding liquid from the exhaust system, providing important safety protection for the production site. The anti-jet mechanism also prevents the sprayed molding liquid from contaminating or damaging precision equipment such as sensors and hydraulic components around the mold, reducing equipment maintenance costs.

[0015] In some embodiments, a first buffer chamber is provided on the exhaust passage; the inner diameter of the first buffer chamber is larger than the inner diameter of the exhaust passage; a temperature sensor is provided inside the first buffer chamber; the cooling passage is configured to introduce a cooling medium into the first buffer chamber when the internal temperature of the first buffer chamber detected by the temperature sensor exceeds a set threshold.

[0016] In the technical solution of this application embodiment, the anti-jet mechanism only starts cooling when an actual high temperature risk is detected, avoiding the problem of premature blockage of the exhaust channel that may be caused by continuous cooling, while saving cooling resources; the expansion design of the first buffer chamber combined with the rapid cooling mechanism can cope with the sudden large amount of molding liquid entering, ensuring that even if a lot of molding liquid accidentally enters, it will not spray out of the system.

[0017] In some embodiments, the end of the exhaust passage opposite to the central exhaust passage is connected to the negative pressure generating mechanism.

[0018] In the technical solution of this application embodiment, the negative pressure environment forms a directional airflow in the exhaust channel, ensuring that the molding liquid and high-temperature gas can only flow along a predetermined path, eliminating the possibility of reverse spraying; under the action of negative pressure suction, the molding liquid passes through the cooling zone in a thin layer, increasing the contact efficiency with the cooling wall and shortening the solidification time; continuous negative pressure avoids the accumulation of molding liquid mist in the exhaust system, eliminating the risk of sudden blockage that may be caused by excessive local concentration.

[0019] In some embodiments, the diameter of the exhaust passage is smaller than the diameter of the portion where it connects to the central exhaust passage.

[0020] In the technical solution of this application embodiment, the small-diameter exhaust channel increases the contact area and contact time between the molding liquid and the cooling wall, enabling the molding liquid to solidify faster and preventing it from continuing to flow forward and spraying out; the narrow exhaust channel diameter naturally forms a flow resistance barrier, which can effectively block the forward movement of the molding liquid that has not yet fully solidified, giving it time to fully solidify; when the gas carrying the molding liquid mist passes through the narrow channel, the flow rate increases and the pressure decreases, which is conducive to the collision and merging of mist particles and their rapid condensation and solidification under the cooling effect.

[0021] In some embodiments, the exhaust channel is provided with a second buffer cavity, which divides the exhaust channel into a first section and a second section; the first section communicates with the central exhaust channel and is connected to the bottom of the second buffer cavity; the second section extends to the outside of the mold body and is connected to the top of the second buffer cavity.

[0022] In the technical solution of this application embodiment, the bottom air inlet and top exhaust design of the second buffer chamber realizes automatic gas-liquid separation. Even if molding liquid enters and accumulates at the bottom of the second buffer chamber, the gas can still be discharged from the top without obstruction, ensuring the continuous operation of the exhaust system. Utilizing the principle of natural gravity separation, it ensures that molding liquid and metal particles are trapped at the bottom of the second buffer chamber, eliminating the risk of spraying out from the end of the exhaust system. The second buffer chamber breaks the potential conditions for continuous liquid column formation, ensuring that only gas can be discharged through the top outlet, eliminating the possibility of liquid spraying out. As a safe collection container, the second buffer chamber can hold a certain amount of solidified metal, providing a buffer time for maintenance and cleaning, and will not immediately affect the operation of the system.

[0023] In some embodiments, the cross-sectional size of the opening in the second section communicating with the second buffer cavity is set to effectively block the molding liquid from entering.

[0024] In the technical solution of this application embodiment, the opening size of the second section communicating with the second buffer chamber forms a physical screening mechanism, allowing only gas to pass through while effectively blocking the liquid molding liquid, preventing the molding liquid from entering the subsequent exhaust system; while completely blocking the molding liquid, the gas discharge is not affected in any way, ensuring the continuous and effective operation of the exhaust system throughout the die casting process; the opening size of the second section communicating with the second buffer chamber prevents the molding liquid from entering the second exhaust channel, avoiding the blockage problem caused by solidification and accumulation inside the channel, and reducing the system maintenance requirements.

[0025] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 Exploded views of radiator die-casting molds provided in some embodiments of this application; Figure 2 This is a schematic diagram of the internal structure of a radiator die-casting mold provided in some embodiments of this application; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 This is a schematic diagram of the structure of the flow guiding component provided in some embodiments of this application; Figure 5 A top view of a portion of the structure of a radiator die-casting mold provided in some embodiments of this application; Figure 6 for Figure 5 Sectional view at point BB; Figure 7 When a first buffer chamber is provided on the exhaust passage Figure 6 Enlarged view of point C; Figure 8 When a second buffer chamber is provided on the exhaust channel Figure 6 Enlarged view of point C; Figure 9 for Figure 8Enlarged view of point D in the middle.

[0028] Icons: 1-Mold body; 10-Molding cavity; 2-Inlet; 3-Overflow well; 4-Flow guide assembly; 40-Flow guide wall; 41-Spiral flow channel; 42-Central exhaust channel; 43-Positioning sleeve; 5-Anti-jet mechanism; 50-Exhaust channel; 500-First buffer chamber; 5000-Temperature sensor; 501-Second buffer chamber; 502-First section; 503-Second section; 51-Cooling channel. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0030] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0031] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0032] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0033] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0034] In this application, "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0035] According to some embodiments of this application, optionally, such as Figures 1-5 As shown, this application provides a radiator die-casting mold, which includes a mold body 1, a liquid inlet 2, an overflow well 3, and a flow guiding component 4. The mold body 1 has a molding cavity 10 for molding the radiator inside. The liquid inlet 2 and the overflow well 3 are respectively disposed on opposite sides of the molding cavity 10 and communicate with the molding cavity 10. The flow guiding component 4 is disposed inside the overflow well 3. The flow guiding component 4 includes a flow guiding wall 40 and a central exhaust channel 42. The flow guiding wall 40 spirals from the outside to the inside to form a spiral flow channel 41. The inlet of the spiral flow channel 41 is connected to the inlet of the overflow well 3. The opening at one end of the central exhaust channel 42 is located at the top of the center of the spiral flow channel 41. The spiral flow channel 41 is configured to guide the molding liquid flowing from the molding cavity 10 into the overflow well 3 along a spiral trajectory to the central exhaust channel 42. The central exhaust channel 42 is configured to discharge the gas in the overflow well 3 from the top of the center of the spiral flow channel 41 to the outside of the mold body 1 during the filling process of the molding liquid.

[0036] Die casting is a process that uses high pressure to inject molding fluid into a mold cavity to quickly form complex metal parts. The specific process consists of four steps: mold closing, injection, pressure holding and solidification, and mold opening and part removal.

[0037] The molding cavity 10 is the core space in the die-casting mold that directly shapes the final part. The molding liquid fills this space under high pressure and solidifies, ultimately forming a part that is completely consistent with the cavity.

[0038] The liquid inlet 2 is a channel connecting the pressure chamber and the molding cavity 10 of the mold column. It is responsible for smoothly and evenly introducing the molding liquid into the molding cavity 10 and is the starting position for filling the molding cavity 10 with the molding liquid.

[0039] Overflow well 3 (i.e. slag bag) is an auxiliary groove next to the cavity of the mold body. Its function is to collect impurities and gas in the molding liquid, protect the quality of the parts in the main cavity, and is the end of the molding liquid filling the molding cavity 10.

[0040] In the actual die-casting process, molten molding liquid (such as aluminum alloy) is injected at high speed into the molding cavity 10 from the inlet 2, filling the flow channels of the thin-walled heat sink fins of the radiator. When the molding liquid flows to the end of the molding cavity 10, excess molding liquid and impurities such as oxide scale and gas are introduced into the spiral flow channel 41 of the guide assembly 4 through the inlet of the overflow well 3. The guide wall 40 guides the molding liquid to flow towards the center along the spiral trajectory, forming a stable vortex; the gas in the molding liquid is pushed towards the center of the spiral flow channel 41 under centrifugal force and discharged to the outside of the mold body 1 through the opening at the top of the central exhaust channel 42. At the same time, solid impurities (such as oxide scale fragments) are deposited on the outside of the flow channel under centrifugal force of the spiral flow channel 41, preventing backflow with the liquid flow. After filling is completed, the molding liquid solidifies in the overflow well 3, forming waste containing impurities, while the radiator (i.e., the molded part, casting) is removed from the molding cavity 10.

[0041] The spiral flow channel 41 guides the molding liquid along a spiral trajectory, increasing the flow path and backflow resistance of the molding liquid, reducing the risk of turbulence and backflow, and confining impurities inside the overflow well 3, preventing them from re-entering the molding cavity 10, thus preventing impurity backflow. The connection between the central exhaust channel 42 and the spiral flow channel 41 is located at the top center of the spiral flow channel 41. It uses the centrifugal effect of the swirling flow to collect and discharge gas in a timely manner, reducing porosity defects and improving the density of the casting. The flow guiding component 4 provided in this application reduces the accumulation of impurities and poor feeding at the end of the molding cavity 10 (near the inlet area of ​​the overflow well 3) by controlling the flow and exhaust of the molding liquid, thereby improving the mechanical strength, thermal conductivity and service life of the radiator.

[0042] In practice, the spiral angle or number of turns of the guide wall 40 can be adjusted according to the viscosity or flow rate of the molding liquid to optimize the flow control effect, which is suitable for die casting of radiators of different materials.

[0043] According to some embodiments of this application, optionally, the upper and lower ends of the guide wall 40 are sealed and abutted against the top and bottom walls of the overflow well 3, respectively.

[0044] During the die casting process, when the molten molding liquid enters the spiral flow channel 41 from the molding cavity 10 through the overflow well 3 inlet, the upper and lower ends of the guide wall 40 respectively abut against the top and bottom walls of the overflow well 3, ensuring that the molding liquid is completely confined within the spiral flow channel 41. This sealing structure prevents the molding liquid from short-circuiting through the gap between the guide wall 40 and the overflow well 3 wall, forcing all liquid entering the overflow well 3 to flow along the complete spiral path set by the guide wall 40 to the central vent 42. This design allows the molding liquid containing impurities to complete sufficient rotation and settling within the spiral flow channel 41.

[0045] The sealed contact structure eliminates possible leakage or bypass flow paths, ensuring that all molding fluid entering the overflow well 3 must undergo a complete spiral flow process, enhancing the centrifugal separation effect and ensuring the integrity of the flow path; the sealed contact structure ensures that gas can only be discharged through the central exhaust channel 42, preventing gas from escaping from the edge of the guide wall 40 and interfering with the normal exhaust process, making the exhaust more concentrated and efficient, and enhancing the exhaust stability.

[0046] In the specific implementation process, sealing ring grooves can be set at the upper and lower ends of the guide wall 40, and high-temperature resistant sealing materials can be installed to further improve the sealing reliability and service life between the guide wall 40 and the overflow well 3.

[0047] According to some embodiments of this application, optionally, such as Figures 3-4 As shown, the flow guiding assembly 4 also includes a positioning sleeve 43; the positioning sleeve 43 is sleeved on the outside of the flow guiding wall 40 and is fixedly connected to the flow guiding wall 40; the outer wall of the positioning sleeve 43 is fitted with the inner wall of the overflow well 3 to fix the position of the flow guiding assembly 4.

[0048] During mold assembly, the flow guide component 4 is precisely installed into the overflow well 3 via the positioning sleeve 43. The operator inserts the positioning sleeve 43, along with the fixed flow guide wall 40, as a single module directly into the overflow well 3. Automatic centering and fixation are achieved through the tight fit between the outer wall of the positioning sleeve 43 and the inner wall of the overflow well 3. In actual die casting, when the molding liquid rushes into the overflow well 3 at high speed and pressure and impacts the flow guide wall 40, the circumferential support provided by the positioning sleeve 43 effectively suppresses the vibration or displacement of the flow guide wall 40, ensuring the stability of the spiral flow channel 41's geometry.

[0049] The positioning sleeve 43 and the inner wall of the overflow well 3 adopt a transition fit or a small clearance fit to ensure that the flow guiding component 4 can maintain accurate alignment in a high-temperature working environment.

[0050] The guide wall 40 and the positioning sleeve 43 are fixedly connected by welding or integral processing to ensure that they will not loosen or separate during long-term use.

[0051] This application uses a positioning sleeve 43 to fix the flow guiding component 4, preventing the flow guiding wall 40 from shifting or vibrating under the impact of high-speed liquid flow, ensuring the stability of the shape and size of the spiral flow channel 41, so that the molding liquid always flows along the designed spiral trajectory. The stable spiral flow channel 41 ensures the uniformity and consistency of the centrifugal force field, making the separation effect of impurities such as oxide scale more reliable and predictable. The positioning sleeve 43 also disperses the liquid flow impact force, reduces the stress directly borne by the flow guiding wall 40, reduces the risk of fatigue damage, and extends the service life of the flow guiding component 4.

[0052] In the specific implementation process, a guide groove can be designed on the outer wall of the positioning sleeve 43, and a corresponding guide key can be set on the inner wall of the overflow well 3 to realize the rapid positioning and replacement of the flow guiding component 4.

[0053] The flow guide assembly 4 can be detachably connected to the overflow well 3 via the positioning sleeve 43. After die casting, the flow guide assembly 4 can be removed from the overflow well, cleaned of any remaining impurities, and reused, reducing the production cost of the radiator. The design of the positioning sleeve 43 makes the flow guide assembly 4 a standardized module, simplifying the mold assembly process. It also allows for direct disassembly and assembly during maintenance, improving repair efficiency. According to some embodiments of this application, optionally, such as Figures 3-4 As shown, there is a gap between the positioning sleeve 43 and the outermost layer of the guide wall 40, so that this part of the guide wall 40 can undergo elastic deformation towards the positioning sleeve 43 under the impact of the molding liquid.

[0054] During the die-casting process, when the high-speed, high-pressure molding fluid impacts the guide wall 40 through the overflow well 3 inlet, the outermost layer of the guide wall 40 can elastically deform towards the positioning sleeve 43 under the impact of the molding fluid due to the pre-reserved gap between the positioning sleeve 43 and the outermost layer of the guide wall 40. This elastic deformation manifests in actual production as follows: when the instantaneous flow rate and pressure increase, the guide wall 40 slightly bends inward (towards the positioning sleeve 43); when the pressure decreases, the guide wall 40 returns to its original shape due to its own elasticity. This dynamic adjustment process allows the spiral flow channel 41 to adaptively cope with pressure fluctuations in the molding fluid.

[0055] The elastic deformation of the guide wall 40 is confined within the space provided by the positioning sleeve 43, thus avoiding permanent deformation or damage caused by excessive deformation.

[0056] The elastic deformation of the guide wall 40 absorbs the high-speed impact energy of the molding fluid, reducing the instantaneous impact load on the guide assembly 4 and significantly improving the durability of the structure. When the molding fluid pressure fluctuates, the guide wall 40 automatically adjusts the flow cross section of the spiral flow channel 41 through elastic deformation, playing a natural pressure stabilizing role and making the spiral flow more stable. By releasing stress through elastic deformation, the guide wall 40 is prevented from plastic deformation or fracture under repeated impacts, thus extending the service life of the mold.

[0057] According to some embodiments of this application, optionally, such as Figures 6-8 As shown, it also includes an anti-jet mechanism 5; the anti-jet mechanism 5 is provided with an exhaust channel 50 and a cooling channel 51 inside; one end of the exhaust channel 50 is connected to the outlet of the central exhaust channel 42, and the other end extends to the outside of the mold body 1; the cooling channel 51 is arranged adjacent to the exhaust channel 50, and the two are not connected to each other; the cooling channel 51 is used for the flow of cooling medium.

[0058] During the die-casting process, when the high-speed flowing molding liquid enters the overflow well 3 and flows through the spiral flow channel 41 to the central exhaust channel 42, occasionally a small amount of molding liquid or gas carrying molding liquid mist may enter the exhaust channel 50. At this time, the cooling channel 51 located inside the anti-jet mechanism 5 continuously circulates cooling medium (usually cooling water). When this high-temperature molding liquid or metal-containing mist passes through the adjacent exhaust channel 50, the cooling medium in the cooling channel 51 rapidly absorbs heat, causing the molding liquid temperature to drop sharply and solidify quickly, or causing the metal mist to condense into solid particles. In actual production, this process effectively prevents the risk of high-temperature molding liquid spraying out from the end of the exhaust channel.

[0059] The anti-jet mechanism 5 provided in this application rapidly cools the molding liquid entering the exhaust channel, causing it to solidify before reaching the exhaust channel outlet. This eliminates the safety hazard of high-temperature molten metal spraying out and injuring people, and avoids potential safety accidents such as burns and fires that may result from the accidental spraying of high-temperature molding liquid from the exhaust system, providing important safety protection for the production site. The anti-jet mechanism 5 also prevents the sprayed molding liquid from contaminating or damaging precision equipment such as sensors and hydraulic components around the mold, reducing equipment maintenance costs.

[0060] In the specific implementation process, multiple cooling channels 51 can be set in different sections of the exhaust channel 50 to form a gradient cooling effect and gradually reduce the temperature of the molding liquid until it is completely cured.

[0061] According to some embodiments of this application, optionally, such as Figure 7 As shown, the exhaust channel 50 is provided with a first buffer chamber 500; the inner diameter of the first buffer chamber 500 is larger than the inner diameter of the exhaust channel 50; a temperature sensor 5000 is provided in the first buffer chamber 500; the cooling channel 51 is configured to: when the internal temperature of the first buffer chamber 500 detected by the temperature sensor 5000 exceeds a set threshold, a cooling medium is introduced into it.

[0062] During the die-casting process, when molding liquid or high-temperature gas carrying molding liquid mist enters the exhaust channel 50, it first reaches the first buffer chamber 500. Because the inner diameter of the first buffer chamber 500 is significantly larger than that of the exhaust channel 50, the fluid velocity drops sharply here, prolonging the residence time. A temperature sensor 5000 installed in the first buffer chamber 500 monitors the temperature change within the chamber in real time. When the temperature exceeds a set safety threshold, the control system immediately introduces cooling medium into the cooling channel 51. The cooling medium rapidly absorbs heat, causing the wall temperature of the first buffer chamber 500 to drop rapidly, ensuring that any entering molding liquid or metal mist is fully cooled and solidified before reaching the outlet of the exhaust channel 50.

[0063] The first buffer chamber 500 is located at a key position in the exhaust channel 50, which can detect temperature anomalies as early as possible and provide sufficient space and time for cooling.

[0064] The anti-jet mechanism 5 only activates cooling when an actual high temperature risk is detected, avoiding premature blockage of the exhaust passage that may be caused by continuous cooling, while saving cooling resources; the expansion design of the first buffer chamber 500, combined with the rapid cooling mechanism, can cope with sudden large-scale entry of molding liquid, ensuring that even if a large amount of molding liquid accidentally enters, it will not spray out of the system.

[0065] In practice, when the temperature sensor detects an extreme high temperature of 5000, in addition to starting the cooling system, it can also trigger an emergency shutdown of the die-casting machine, providing ultimate safety assurance.

[0066] According to some embodiments of this application, optionally, the end of the exhaust passage 50 opposite to the central exhaust passage 42 is connected to the negative pressure generating mechanism.

[0067] During the die-casting process, a negative pressure generating mechanism establishes a stable negative pressure environment within the exhaust channel 50. When the molding liquid or gas carrying molding liquid mist enters the exhaust channel 50 from the central exhaust channel 42, the negative pressure environment generates a strong suction force, accelerating these high-temperature substances through the exhaust channel 50. Simultaneously, the cooling channel 51 continues to operate, and under the combined action of negative pressure suction and the cooling medium, the molding liquid is rapidly cooled and solidified as it passes through the exhaust channel 50.

[0068] The negative pressure generating mechanism must be started before the injection process and can only be shut down after the molding liquid has completely solidified, ensuring safe control throughout the entire process.

[0069] The negative pressure environment creates a directional airflow within the exhaust channel 50, ensuring that the molding liquid and high-temperature gas can only flow along a predetermined path, eliminating the possibility of reverse ejection. Under the suction effect of negative pressure, the molding liquid passes through the cooling zone in a thin layer, increasing the contact efficiency with the cooling wall and shortening the solidification time. Continuous negative pressure avoids the accumulation of molding liquid mist in the exhaust system, eliminating the risk of sudden blockage that may be caused by excessively high local concentration.

[0070] According to some embodiments of this application, optionally, the diameter of the exhaust passage 50 is smaller than the diameter of the portion where it connects with the central exhaust passage 42.

[0071] During die casting, when the molding liquid or gas carrying molding liquid mist enters the exhaust channel 50 from the outlet of the larger-diameter central exhaust channel 42, the diameter of the exhaust channel 50 suddenly narrows. According to fluid dynamics principles, the fluid accelerates at this point. This diameter change design allows the molding liquid entering the exhaust system to contact the cooling channel 51 wall as a thinner liquid film when passing through the narrow section. In actual production, when the molding liquid flows from the large-diameter area of ​​the central exhaust channel 42 to the small-diameter area of ​​the exhaust channel 50, the flow velocity increases, and the contact area with the cooling wall also increases accordingly, significantly improving cooling efficiency.

[0072] The small-diameter exhaust channel 50 increases the contact area and contact time between the molding liquid and the cooling wall, allowing the molding liquid to solidify faster and preventing it from continuing to flow forward and spraying out. The narrow diameter of the exhaust channel 50 naturally forms a flow resistance barrier, which can effectively block the forward movement of the molding liquid that has not yet fully solidified, giving it time to solidify fully. When the gas carrying the molding liquid mist passes through the narrow channel, the flow rate increases and the pressure decreases, which is conducive to the collision and merging of mist particles and their rapid condensation and solidification under the cooling effect.

[0073] In practice, the exhaust channel 50 can be designed as a multi-stage gradually decreasing diameter structure to form a stepped cooling and blocking effect, further improving the reliability of anti-spraying.

[0074] According to some embodiments of this application, optionally, such as Figures 8-9 As shown, the exhaust channel 50 is provided with a second buffer cavity 501, which divides the exhaust channel 50 into a first section 502 and a second section 503; the first section 502 is connected to the central exhaust channel 42 and is connected to the bottom of the second buffer cavity 501; the second section 503 extends to the outside of the mold body 1 and is connected to the top of the second buffer cavity 501.

[0075] During the die-casting process, when the molding liquid or gas carrying molding liquid mist enters the first section 502 exhaust channel 50 from the central exhaust channel 42, it enters the second buffer chamber 501 from the bottom. Since the volume of the second buffer chamber 501 is significantly larger than the exhaust channel 50, the fluid velocity drops sharply here. Heavier molding liquid droplets and solidified particles settle downwards due to gravity and accumulate at the bottom of the second buffer chamber 501; while lighter gas naturally rises to the top of the chamber and is discharged from the second section 503 exhaust channel 50. Even if some molding liquid enters the second buffer chamber 501 and accumulates at the bottom, because the gas outlet is located at the top of the chamber and much higher than the liquid accumulation plane, the gas can still smoothly bypass the liquid area and be discharged from the top outlet, ensuring the continuous smooth flow of the exhaust system.

[0076] The bottom-inlet and top-outlet design of the second buffer chamber 501 in this application enables automatic gas-liquid separation. Even if molding liquid enters and accumulates at the bottom of the second buffer chamber 501, the gas can still be discharged from the top without obstruction, ensuring the continuous operation of the exhaust system. Utilizing the principle of natural gravity separation, it ensures that molding liquid and metal particles are trapped at the bottom of the second buffer chamber 501, eliminating the risk of spraying out from the end of the exhaust system. The second buffer chamber 501 breaks the potential conditions for continuous liquid column formation, ensuring that only gas can be discharged through the top outlet, eliminating the possibility of liquid spraying out. As a safe collection container, the second buffer chamber 501 can hold a certain amount of solidified metal, providing a buffer time for maintenance and cleaning, and will not immediately affect the operation of the system.

[0077] In the specific implementation process, the bottom of the second buffer chamber 501 can be designed as an inclined structure to guide the accumulated molding liquid to one side and further increase the height of the effective gas channel.

[0078] A gas guide vane is also installed at the top of the second buffer chamber 501 to optimize the gas flow path and reduce exhaust resistance.

[0079] According to some embodiments of this application, optionally, the cross-sectional size of the opening connecting the second segment 503 and the second buffer cavity 501 is set to effectively block the molding liquid from entering.

[0080] During the die-casting process, when gas carrying a trace amount of molding liquid enters the second buffer chamber 501, the gas naturally rises to the top of the chamber. At this time, the cross-sectional size of the opening connecting the second section 503 and the second buffer chamber 501 is set within a specific range. The surface tension and airflow resistance created by this size effectively block the passage of liquid molding liquid. In actual production, even if a small amount of molding liquid rises to the top of the second buffer chamber 501 under the influence of gas, it will be blocked outside the exhaust channel 50 of the second section 503 due to the size limitation of the opening. At the same time, this opening size effectively blocks the molding liquid without significantly hindering the passage of gas, ensuring the continuous smooth flow of the exhaust system.

[0081] The opening size connecting the second section 503 and the second buffer chamber 501 forms a physical screening mechanism, allowing only gas to pass through while effectively blocking the liquid molding liquid, preventing the molding liquid from entering the subsequent exhaust system; while completely blocking the molding liquid, the gas discharge is not affected in any way, ensuring the continuous and effective operation of the exhaust system throughout the die casting process; the opening size connecting the second section 503 and the second buffer chamber 501 prevents the molding liquid from entering the exhaust channel 50 of the second section 503, avoiding the blockage problem caused by solidification and accumulation inside the channel, and reducing the system maintenance requirements.

[0082] In the specific implementation process, a temperature-responsive material can be set at the opening where the second section 503 connects to the second buffer cavity 501. When the internal temperature of the second buffer cavity 501 reaches the preset temperature, it will automatically shrink to reduce the opening size and enhance the barrier effect.

[0083] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A radiator die-casting mold, characterized in that, include: The mold body has a molding cavity inside for molding the heat sink; The liquid inlet and the overflow well are respectively located on opposite sides of the forming cavity and are connected to the forming cavity; A flow guiding component is disposed inside the overflow well; The flow guiding component includes: The guide wall spirals from the outside to the inside to form a spiral flow channel, and the inlet of the spiral flow channel is connected to the inlet of the overflow well. The central exhaust duct has an opening at one end located at the top of the center of the spiral flow channel; The spiral flow channel is configured to guide the molding fluid flowing from the molding cavity into the overflow well along a spiral trajectory toward the central exhaust channel at the center; The central vent is configured to discharge gas from the top of the spiral flow channel center to the outside of the mold body during the molding liquid filling process.

2. The radiator die-casting mold according to claim 1, characterized in that, The upper and lower ends of the guide wall are respectively sealed and abutted against the top and bottom walls of the overflow well.

3. The radiator die-casting mold according to claim 1, characterized in that, The flow guiding assembly also includes a positioning sleeve; The positioning sleeve is fitted onto the outside of the guide wall and is fixedly connected to the guide wall; The outer wall of the positioning sleeve fits against the inner wall of the overflow well to fix the position of the flow guiding component.

4. A radiator die-casting mold according to claim 3, characterized in that, A gap is left between the positioning sleeve and the outermost layer of the guide wall, so that this part of the guide wall can undergo elastic deformation towards the positioning sleeve under the impact of the molding liquid.

5. A radiator die-casting mold according to claim 1, characterized in that, It also includes a jet skid protection mechanism; The anti-jet mechanism is equipped with an exhaust channel and a cooling channel; One end of the exhaust channel is connected to the outlet of the central exhaust channel, and the other end extends to the outside of the mold body; The cooling channel is located adjacent to the exhaust channel, but the two are not connected to each other; The cooling channel is used for the flow of cooling medium.

6. A radiator die-casting mold according to claim 5, characterized in that, The exhaust passage is provided with a first buffer chamber; The inner diameter of the first buffer chamber is larger than the inner diameter of the exhaust channel; A temperature sensor is installed inside the first buffer chamber; The cooling channel is configured to introduce a cooling medium into it when the internal temperature of the first buffer chamber detected by the temperature sensor exceeds a set threshold.

7. A radiator die-casting mold according to claim 5, characterized in that, The end of the exhaust channel opposite to the central exhaust channel is connected to the negative pressure generating mechanism.

8. A radiator die-casting mold according to claim 5, characterized in that, The diameter of the exhaust passage is smaller than the diameter of the opening where it connects with the central exhaust passage.

9. A radiator die-casting mold according to claim 5, characterized in that, The exhaust passage is provided with a second buffer chamber, which divides the exhaust passage into a first section and a second section; The first section is connected to the central exhaust duct and is connected to the bottom of the second buffer chamber; The second section extends to the outside of the mold body and connects to the top of the second buffer cavity.

10. A radiator die-casting mold according to claim 9, characterized in that, The cross-sectional dimensions of the opening in the second section that communicates with the second buffer cavity are set to effectively prevent the molding liquid from entering.

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