A multi-channel flow divider and equipment for precision casting in multiple mold cavities

Abstract

This application provides a multi-channel flow divider and equipment for precision casting in multi-cavity molds, belonging to the technical field of vacuum impregnation equipment. The device includes a casting pipe, a buffer tank, a main pipe, and multiple sub-pipes. By setting flow-limiting structures in each sub-pipe or directly using a flow cross-section smaller than that of the main pipe, and utilizing the inherent characteristics of the fluid, multiple sub-pipes are automatically activated sequentially when the raw material is injected into the casting tank. This design achieves a dynamic control process where the raw material injection speed gradually increases from an initial low-speed safety stage to a high speed over time. It effectively solves the technical problems of low efficiency, poor vacuum stability, and the tendency for bubbles and material shortages in products caused by the traditional single slow pouring method in multi-mold, complex-layout vacuum casting environments, while ensuring operational safety and consistent casting product quality.

Description

Technical Field

[0001] This application relates to the field of vacuum impregnation equipment technology, and in particular to a multi-channel diversion device and equipment for precision casting in multiple mold cavities. Background Technology

[0002] Vacuum impregnation (or vacuum casting) technology is a process widely used in composite materials, electronic packaging, food processing, and art casting. Its core principle lies in using a vacuum environment to remove air from the workpiece or mold cavity, allowing the impregnating liquid or casting material to fully fill the micropores inside the workpiece or complex mold cavity under the influence of external atmospheric pressure or its own gravity, achieving the purpose of sealing, reinforcement, encapsulation, or molding.

[0003] In this process, the workpiece or mold to be processed is typically placed in a vacuum chamber, evacuated to the target negative pressure, and then the raw material liquid is poured into the chamber to submerge the workpiece or injected into the mold through the pouring port. However, the pouring process presents significant technical challenges: if the raw material contains volatile solvents or dissolved air, it will experience instantaneous and violent boiling (i.e., "bumping") when suddenly introduced into a high vacuum environment due to a sharp drop in boiling point, leading to liquid splashing, material loss, vacuum pump contamination, and even safety accidents. Therefore, the safety operating procedure generally followed by those skilled in the art is to slowly pour the raw material into the vacuum chamber to ensure that the evaporation of solvents and the escape of gases proceed smoothly.

[0004] However, the inventors have discovered that the aforementioned traditional single slow pouring method exhibits new limitations when dealing with vacuum gating systems containing multiple molds of different types, structures, and layouts. Specifically: The conflict between efficiency and quality: When a large number of molds are placed inside a vacuum tank, slow pouring means the entire casting process takes an extremely long time. This not only reduces production efficiency, but more importantly, during the long pouring process, the risk of leakage increases due to the vacuum tank's sealing interface, valves, and other components being under negative pressure for an extended period. This can lead to a gradual decrease in the vacuum level inside the tank, which in turn disrupts the stable environment required for the process and ultimately affects the uniformity of product quality.

[0005] The challenges of filling complex mold groups: Multiple molds densely packed within a container create a complex spatial layout, hindering the natural leveling of the liquid. An excessively slow pouring speed prevents the liquid from quickly and synchronously covering the bottom of all molds, causing it to initially accumulate locally and spread slowly. This "climbing" method easily traps and retains gas in the complex gaps between the mold groups, forming difficult-to-explode "air pockets." Furthermore, for molds with small runners or complex cavities, a slow rise in liquid level can lead to the gradual submersion of the gating and venting ports, disrupting the balance between the internal negative pressure and external vacuum of the mold. This further impedes the smooth expulsion of gas from the cavity, resulting in defects such as internal air bubbles and material shortages in the product.

[0006] Risk of air re-entry in the later stages of the pouring process: If the pouring speed remains extremely slow in the later stages, and the tank inlet remains open to the atmosphere for an extended period, the probability of external air being re-drawn into the tank increases. This newly introduced air will form bubbles, directly contaminating the raw materials and affecting the quality of the final product. Utility Model Content

[0007] The purpose of this invention is to solve the above-mentioned problems by providing a multi-channel diversion device and equipment for precision casting in multi-cavity molds.

[0008] The technical solution of this application is implemented as follows: In a first aspect, this application provides a multi-channel diversion device for precision casting in multiple mold cavities. The diversion device is installed on the side of the casting tank and is used to inject raw materials into the casting tank. The device includes: A pouring pipe; used for injecting raw materials; A buffer tank, the top of which is connected to the pouring pipe, into which the raw material injected from the pouring pipe enters the buffer tank; The main pipeline and the sub-pipeline are provided. One end of the main pipeline is connected to the bottom of the buffer tank, and the raw materials in the buffer tank can flow into the main pipeline. The first end of the sub-pipeline is connected to the lower end of the main pipeline and is in communication with it. The second end is in communication with the casting tank. The sub-pipes are arranged in several ways along the length of the main pipe; Furthermore, the first ends of several sub-pipes are equidistantly connected along the length of the main pipe, and the second ends of several sub-pipes are equidistantly connected along the height of the casting tank. The device also includes a flow-limiting structure for adjusting the flow cross-section of the sub-pipe.

[0009] Secondly, this application also provides a multi-channel diversion device for precision casting in multiple mold cavities. The diversion device is installed on the side of the casting tank and is used to inject raw materials into the casting tank. The device includes: A pouring pipe; used for injecting raw materials; A buffer tank, the top of which is connected to the pouring pipe, into which the raw material injected from the pouring pipe enters the buffer tank; The main pipeline and the sub-pipeline are provided. One end of the main pipeline is connected to the bottom of the buffer tank, and the raw materials in the buffer tank can flow into the main pipeline. The first end of the sub-pipeline is connected to the lower end of the main pipeline and is in communication with it. The second end is in communication with the casting tank. The sub-pipes are arranged in several ways along the length of the main pipe; Furthermore, the first ends of several sub-pipes are equidistantly connected along the length of the main pipe, and the second ends of several sub-pipes are equidistantly connected along the height of the casting tank. The cross-section of the sub-pipe is smaller than the flow-through cross-section of the main pipe.

[0010] Thirdly, this application also provides an apparatus for multi-cavity precision casting, the apparatus including a casting tank, the casting tank being equipped with the aforementioned multi-channel diversion device for multi-cavity precision casting.

[0011] The advantages or beneficial effects of the above technical solutions include at least the following: This multi-channel diversion device, through the coordinated design of a buffer tank, main pipeline, and multiple sub-pipes with flow-limiting functions, cleverly utilizes the inherent characteristics of the fluid to achieve a dynamic injection process of raw materials from an initial low speed to subsequent high speed. This effectively solves the problems of low efficiency, difficulty in maintaining vacuum, and product bubbles and material shortages caused by poor liquid leveling and premature flooding of the mold vents in vacuum casting environments with multiple molds and complex layouts, which are often due to slow pouring alone. Simultaneously, the device ensures safety by limiting the flow rate of the first sub-pipe in the initial pouring stage, avoiding the risk of volatile raw materials boiling over. Then, by automatically activating multiple sub-pipes sequentially, it accelerates the synchronous coverage and filling of all molds by the raw materials, significantly improving casting efficiency and product quality consistency, and reducing the risk of air re-entry due to prolonged operation. This provides a safe, efficient, and reliable automated solution for multi-cavity precision casting. Attached Figure Description

[0012] The accompanying drawings illustrate exemplary embodiments of the present application and, together with the description thereof, serve to explain the principles of the present application. These drawings are included to provide a further understanding of the present application and are incorporated in and constitute a part of this specification.

[0013] Figure 1 A schematic diagram of the structure of the device according to the first embodiment of the present invention is shown; Figure 2A schematic diagram of the device according to the second embodiment of the present invention is shown, wherein the vertical pipes have a uniform length; Figure 3 A schematic diagram of the device according to the second embodiment of the present invention is shown, wherein the upper part represents the vertical pipe becoming longer and the lower part represents the vertical pipe becoming shorter; Figure 4 The diagram shows a structural schematic of the device according to the second embodiment of the present invention, wherein the topmost section represents a uniform length of vertical tubes, the middle section represents increasingly longer vertical tubes, and the bottom section represents increasingly shorter vertical tubes. Figure 5 It shows Figure 4 The diagrams illustrate the flow velocity of raw materials into the casting tank under three different vertical pipe configurations. The three diagrams (top, middle, and bottom) correspond to... Figure 4 The three implementation methods (top, middle, and bottom) show time on the horizontal axis and velocity on the vertical axis. Figure 6 A schematic diagram of the observation window and inclined plate according to an embodiment of the present invention is shown; Reference numerals: 10, casting tank; 20, device; 21, casting pipe; 22, buffer tank; 221, inclined plate; 222, observation window; 23, main pipe; 231, main valve; 24, sub-pipe; 241, vertical pipe; 2411, sub-valve; 242, inclined pipe. Detailed Implementation

[0014] Embodiments of this application will now be described in more detail with reference to the accompanying drawings. While some embodiments of this application are shown in the drawings, it should be understood that this application can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this application. It should be understood that the drawings and embodiments of this application are for illustrative purposes only and are not intended to limit the scope of protection of this application.

[0015] It should be noted that, where there is no conflict, the embodiments and features described in this application can be combined with each other. The application will now be described in detail with reference to the accompanying drawings and embodiments. The drawings are for reference only and are not entirely consistent with the actual scale; their purpose is to highlight the core structure and functional features of this application.

[0016] It should be understood that the term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to". The term "based on" means "at least partially based on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". Definitions of other terms will be given in the following description. It should be noted that the concepts of "first", "second", etc., mentioned in this application are used only to distinguish different devices, modules, or units, and are not intended to limit the order of functions performed by these devices, modules, or units or their interdependencies.

[0017] It should be noted that the terms "one" and "more" used in this application are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0018] The names of the messages or information exchanged between multiple devices in the embodiments of this application are for illustrative purposes only and are not intended to limit the scope of these messages or information.

[0019] Example 1: Reference Figure 1 This embodiment discloses a multi-channel diversion device for precision casting of multi-cavity molds. The diversion device 20 is installed on the side of the casting tank 10 and is used to inject raw materials into the casting tank 10. The casting tank 10 contains molds of different specifications and heights. Device 20 includes: 21; used for injecting raw materials; The buffer tank 22 is connected to the top of the pouring pipe 21, and the raw material injected from the pouring pipe 21 enters the buffer tank 22 for buffering. The device 20 includes a main pipe 23 and a sub-pipe 24. One end of the main pipe 23 is connected to the bottom of the buffer tank 22, allowing raw materials in the buffer tank 22 to flow into the main pipe 23. The first end of the sub-pipe 24 is connected to the lower end of the main pipe 23, and the second end is connected to the casting tank 10. The sub-pipe 24 includes a vertical pipe 241 and an inclined pipe 242. One end of the vertical pipe 241 is the first end of the sub-pipe 24, and the other end is connected to the inclined pipe 242. One end of the inclined pipe 242 is the second end of the sub-pipe 24, and the other end is connected to the vertical pipe 241. Furthermore, the device 20 also includes a flow-limiting structure for adjusting the flow cross-section of the sub-pipe 24. The flow-limiting structure includes a sub-valve 2411, which is installed on the vertical pipe 241. Before using the device, the sub-valve 2411 needs to be adjusted to reduce the flow cross-section of the sub-pipe 24 until it is less than the flow cross-section of the main pipe 23.

[0020] Among them, such as Figure 1As shown, several sub-pipes 24 are provided along the length of the main pipe 23; Furthermore, the first ends of several sub-pipes 24 are equidistantly connected along the length of the main pipe 23, and the second ends of several sub-pipes 24 are equidistantly connected along the height of the casting tank 10. When the raw material flows down from the buffer tank 22, it will first enter the first sub-pipe 24 and enter the casting tank 10 through the first sub-pipe 24. However, due to the reduction of the flow cross-section of the sub-pipe 24 by the sub-valve 2411, the flow velocity of the sub-pipe 24 is much smaller than that of the main pipe 23. Therefore, the raw material will accumulate between the first sub-pipe 24 and the main pipe 23. After accumulating to a certain extent, the raw material will continue to flow towards the second sub-pipe 24 of the main pipe 23 until it flows into the second sub-pipe 24. At this time, the raw material enters the casting tank 10 through the second sub-pipe 24. At this time, the same raw material accumulation problem as the first sub-pipe 24 occurs in the second sub-pipe 24. Then the raw material flows to the next sub-pipe 24 until it flows through all the sub-pipes 24. After the above steps, the operator can precisely control the input speed of the raw material in the casting tank 10 through the sub-valve 2411 according to the needs of the mold. The speed can be increased from a small initial speed over time (because there are more and more sub-pipes 24 for inputting raw materials). It should be noted that the flow cross-sections adjusted by all sub-valve 2411 may be the same or different. However, in any case, after the adjustment by sub-valve 2411, the sum of the flow cross-sections of all sub-pipes 24 must not exceed the flow cross-section of the main pipe 23. Otherwise, it may be easy for raw materials to flow into all sub-pipes 24. If it is not necessary for raw materials to flow into all sub-pipes 24, adjustments can be made according to the situation.

[0021] Example 2: Reference Figure 2 This embodiment discloses a multi-channel diversion device for precision casting of multi-cavity molds. The diversion device 20 is installed on the side of the casting tank 10 and is used to inject raw materials into the casting tank 10. Device 20 includes: 21; used for injecting raw materials; The buffer tank 22 is connected to the top of the pouring pipe 21, and the raw material injected from the pouring pipe 21 enters the buffer tank 22; The main pipe 23 and the sub-pipe 24 are provided. One end of the main pipe 23 is connected to the bottom of the buffer tank 22, and the raw material in the buffer tank 22 can flow into the main pipe 23. The first end of the sub-pipe 24 is connected to the lower end of the main pipe 23 and is in communication with it. The second end is connected to the casting tank 10. The sub-pipe 24 includes a vertical pipe 241 and an inclined pipe 242. One end of the vertical pipe 241 is the first end of the sub-pipe 24, and the other end is connected to the inclined pipe 242. One end of the inclined pipe 242 is the second end of the sub-pipe 24, and the other end is connected to the vertical pipe 241. Several sub-pipes 24 are provided along the length of the main pipe 23. The first ends of several sub-pipes 24 are equidistantly connected along the length of the main pipe 23, and the second ends of several sub-pipes 24 are equidistantly connected along the height of the casting tank 10. Unlike Embodiment 1, the design of sub-valve 2411 is omitted, and the cross-section of sub-pipe 24 is set to be smaller than the flow cross-section of main pipe 23. However, the sum of the flow cross-sections of all sub-pipes 24 is equal to the flow cross-section of main pipe 23. When the raw material flows down from the buffer tank 22, it will first enter the first sub-pipe 24 and enter the casting tank 10 through the first sub-pipe 24. However, since the flow cross-section of sub-pipe 24 is much smaller than that of main pipe 23, a flow velocity difference is generated, and the raw material will accumulate between the first sub-pipe 24 and main pipe 23. After accumulating to a certain extent, the raw material will continue to flow towards the second sub-pipe 24 of main pipe 23 until it flows into the second sub-pipe 24. At this time, the raw material enters the casting tank 10 through the second sub-pipe 24. At this time, the same raw material accumulation problem as the first sub-pipe 24 occurs in the second sub-pipe 24. Then the raw material flows to the next sub-pipe 24 until it flows through all sub-pipes 24.

[0022] Specific examples Figure 4 As shown, the length of the vertical pipe 241 is set to be shorter or longer along the direction away from the buffer tank 22 of the main pipe; when the length of the vertical pipe 241 is set to be longer along the direction away from the buffer tank 22 of the main pipe, the inclined pipe 242 is more inclined downwards from the horizontal plane; when the length of the vertical pipe 241 is set to be shorter along the direction away from the buffer tank 22 of the main pipe, the inclined pipe 242 is more inclined upwards from the horizontal plane.

[0023] like Figure 4 The text lists three different lengths of vertical tubes (241). Figure 4 The first image at the top shows that the vertical pipe 241 has a uniform length, and the raw material falls from the vertical pipe 241 to the inclined pipe 242 at a uniform speed. Therefore, the overall rate of raw material flowing into the casting tank 10 increases uniformly. Figure 4 The second image in the middle shows that the length of the vertical tube 241 becomes longer and the inclination of the inclined tube 242 gradually becomes more horizontal. This results in the flow rate of the raw material in the inclined tube 242 being slower than that in the first image. Therefore, as time goes by, the overall rate of raw material flowing into the casting tank 10 increases at a slower pace. Figure 4 The third image below shows that the length of the vertical tube 241 becomes shorter and the inclination of the inclined tube 242 gradually becomes more vertical. This results in the material flow rate in the inclined tube 242 being faster than that in the first and second images. Therefore, as time goes on, the overall material flow rate into the casting tank 10 increases at an increasingly faster rate.

[0024] Compared to the first embodiment, the user does not need to adjust the sub-valve 2411 before pouring. The length of the vertical pipe 241 can be adjusted according to the mold conditions in the pouring tank 10, and the pouring operation can be carried out in a targeted manner. This avoids the situation where the sub-valve 2411 is not adjusted accurately due to "empiricism" and ensures the consistency of product quality.

[0025] An embodiment of this utility model also provides a multi-cavity precision casting device, the device including a casting tank 10, the casting tank 10 being equipped with a multi-channel diversion device 20 for multi-cavity precision casting as described in any of the above claims.

[0026] Device 20 also includes: The main valve 231 is installed on the main pipeline 23 and is used to close or open the main pipeline 23. An inclined plate 221 is installed inside the buffer tank 22. The inclined plate 221 corresponds to the bottom of the pouring pipe 21, which helps the raw material to spread evenly in the buffer tank 22 and avoids accumulation. The observation window 222 is installed on the side wall of the buffer tank 22 and is used to observe the amount of raw materials stored in the buffer tank 22.

[0027] In the description of this application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0028] Those skilled in the art should understand that the above embodiments are merely for illustrative purposes and are not intended to limit the scope of this application. Those skilled in the art can make other changes or modifications based on the above disclosure, and these changes or modifications still fall within the scope of this application.

Claims

1. A multi-path diverging device for multi-cavity precision casting, characterized in that: The diversion device (20) is installed on the side of the casting tank (10) and is used to inject raw materials into the casting tank (10); The device (20) includes: Serving pipe (21); used for injecting raw materials; A buffer tank (22) is connected at its top to the pouring pipe (21), and the raw material injected from the pouring pipe (21) enters the buffer tank (22); The main pipe (23) and the sub-pipe (24) are connected. One end of the main pipe (23) is connected to the bottom of the buffer tank (22). The raw material in the buffer tank (22) can flow into the main pipe (23). The first end of the sub-pipe (24) is connected to the lower end of the main pipe (23) and communicates with it. The second end is connected to the casting tank (10). Among them, several sub-pipes (24) are provided along the length direction of the main pipe (23); Furthermore, the first ends of several sub-pipes (24) are equidistantly connected along the length direction of the main pipe (23), and the second ends of several sub-pipes (24) are equidistantly connected along the height direction of the casting tank (10); The device (20) further includes a flow-limiting structure for adjusting the flow cross-section of the sub-pipe (24).

2. The multi-channel diversion device for precision casting in multiple cavities according to claim 1, characterized in that: The sub-pipe (24) includes a vertical pipe (241) and an inclined pipe (242); One end of the vertical pipe (241) is the first end of the sub-pipe (24), and the other end is connected to the inclined pipe (242); One end of the inclined tube (242) is the second end of the sub-pipe (24), and the other end is connected to the vertical tube (241).

3. The multi-manifold split device for precision pouring of multi-cavity according to claim 2, wherein: The flow-limiting structure includes a sub-valve (2411), which is installed on the vertical pipe (241).

4. A multi-path diverging device for multi-cavity precision pouring, characterized in that: The diversion device (20) is installed on the side of the casting tank (10) and is used to inject raw materials into the casting tank (10); The device (20) includes: Casting pipe (21); used for injecting raw materials; A buffer tank (22) is connected at its top to the pouring pipe (21), and the raw material injected from the pouring pipe (21) enters the buffer tank (22); The main pipe (23) and the sub-pipe (24) are connected. One end of the main pipe (23) is connected to the bottom of the buffer tank (22). The raw material in the buffer tank (22) can flow into the main pipe (23). The first end of the sub-pipe (24) is connected to the lower end of the main pipe (23) and communicates with it. The second end is connected to the casting tank (10). Among them, several sub-pipes (24) are provided along the length direction of the main pipe (23); Furthermore, the first ends of several sub-pipes (24) are equidistantly connected along the length direction of the main pipe (23), and the second ends of several sub-pipes (24) are equidistantly connected along the height direction of the casting tank (10); The cross-section of the sub-pipe (24) is smaller than the flow cross-section of the main pipe (23).

5. The multi-manifold precision pouring apparatus of claim 4, wherein: The sub-pipe (24) includes a vertical pipe (241) and an inclined pipe (242); One end of the vertical pipe (241) is the first end of the sub-pipe (24), and the other end is connected to the inclined pipe (242); One end of the inclined tube (242) is the second end of the sub-pipe (24), and the other end is connected to the vertical tube (241).

6. The multi-channel diversion device for precision casting in multiple cavities according to claim 5, characterized in that: in, The length of the vertical tube (241) is set to be shorter or longer along the direction away from the main tube and the buffer tank (22); As the length of the vertical tube (241) increases along the direction away from the buffer tank (22) from the main tube, the inclined tube (242) becomes more inclined downwards from the horizontal plane; The shorter the length of the vertical tube (241) is along the direction away from the buffer tank (22) from the main tube, the more the inclined tube (242) is inclined above the horizontal plane.

7. An apparatus for precision pouring of multi-cavity molds, characterized by: The equipment includes a casting tank (10) equipped with a multi-channel diversion device for precision casting of multi-cavity molds as claimed in claim 3 or 6.

8. The equipment for multi-cavity precision casting according to claim 7, characterized in that: The device (20) further includes: A main valve (231) is installed on the main pipeline (23) for closing or opening the main pipeline (23). An inclined plate (221) is installed inside the buffer tank (22), and the inclined plate (221) is directly below the pouring pipe (21); An observation window (222) is installed on the side wall of the buffer tank (22) to observe the amount of raw materials stored in the buffer tank (22).

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