Pouring and discharging structure for heat dissipation ribs and mold

Abstract

The utility model belongs to the technical field of die-casting equipment, and particularly relates to a pouring and discharging structure for a heat dissipation rib and a die. The pouring and discharging structure for the radiating ribs comprises a main runner, a plurality of branch runners, a buffer platform and a product cavity which are communicated in sequence, and one side of the buffer platform is provided with flow gates communicated with the branch runners, and the other end of the buffer platform is communicated with the product cavity. In other words, in the die-casting process, metal feed liquid can pass through the buffer platform before entering the cavity from the branch flow channel, the buffer platform enables the feed liquid not to directly impact the roots of the heat dissipation ribs, and erosion of the roots of the heat dissipation ribs is prevented. The defects of insufficient casting and poor forming of the top of the radiating rib are effectively improved, and the qualified rate of products is increased.

Description

Technical Field

[0001] This utility model belongs to the technical field of die-casting equipment, specifically relating to a gating structure and mold for heat dissipation fins. Background Technology

[0002] Currently, in the aluminum alloy high-pressure die-casting industry, to improve heat dissipation, the heat dissipation fins of radiators are becoming increasingly thinner, with the thinnest fins only 1mm at the top. This significantly increases the difficulty of die-casting. Furthermore, some heat dissipation fins are quite tall, making it difficult to fill with molten metal. Additionally, due to the thinness of the fins, the molten metal is prone to cold shut-off, preventing effective shrinkage during subsequent pressurization and resulting in porosity in the fins. Therefore, defects such as under-casting and poor filling of the fins occur during the production of radiators, leading to a low product yield. Utility Model Content

[0003] The purpose of this invention is to provide a gating structure and mold for heat dissipation ribs to solve the technical problem of poor filling of heat dissipation ribs.

[0004] This application provides a gating structure for heat dissipation fins. The gating structure for heat dissipation fins includes: a main flow channel, several branch flow channels, a buffer platform, and a product cavity connected sequentially;

[0005] One side of the buffer platform is provided with an inner gate that communicates with each branch channel, and the other side is connected to the product cavity.

[0006] In one embodiment of this application, the width of the buffer platform along the branch channel to the product cavity is 10-15 mm.

[0007] In one embodiment of this application, the product cavity includes: a top plate cavity, multiple heat dissipation fin cavities, and a side wall plate cavity; wherein

[0008] The plurality of heat dissipation rib cavities are spaced apart on the upper side of the product top plate cavity, and the root of each heat dissipation rib cavity is connected to the upper surface of the product top plate cavity.

[0009] The sidewall cavity is located below the top cavity of the product, and the top of the sidewall cavity is connected to the four sides of the top cavity of the product; and

[0010] The outer walls of the sidewall plate cavity and each heat dissipation rib cavity form a first junction, and the buffer platform is connected to the sidewall plate cavity located immediately below the first junction.

[0011] In one embodiment of this application, a second interface is formed between the lower surface of the top plate cavity and the inner surface of the side wall cavity;

[0012] The second junction has rounded corners.

[0013] In one embodiment of this application, the radius of the fillet at the second junction near the buffer platform is larger than the fillets on the other sides.

[0014] In one embodiment of this application, the radius of the rounded corner at the second junction near the buffer platform side is 5-8 mm.

[0015] In one embodiment of this application, the plurality of heat dissipation fin cavities are spaced apart along the x-direction;

[0016] The buffer platform extends along the x-direction.

[0017] In one embodiment of this application, the buffer platform includes several segments.

[0018] In one embodiment of this application, the main channel is connected to a material cake.

[0019] Accordingly, this application provides a mold including the heat dissipation rib gating structure as described above.

[0020] The beneficial effects of this utility model are:

[0021] Unlike existing technologies, this application provides a gating structure for heat dissipation ribs. This gating structure includes: a main flow channel, several branch flow channels, a buffer platform, and a product cavity, all connected sequentially. One side of the buffer platform has an ingate communicating with each branch flow channel, and the other side communicates with the product cavity. In other words, during die casting, before the molten metal enters the cavity from the branch flow channels, it passes through the buffer platform. The buffer platform prevents the molten metal from directly impacting the root of the heat dissipation ribs, thus preventing erosion at the root. This effectively improves defects such as under-casting and poor forming at the top of the heat dissipation ribs, increasing the product yield.

[0022] In addition, the radius of the rounded corners on the back of the base of the heat dissipation fins is increased to make the filling of molten metal into the top of the fins smoother.

[0023] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention are realized and obtained through the structures particularly pointed out in the description and the accompanying drawings.

[0024] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0025] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of a traditional gating system;

[0027] Figure 2 This is a perspective view of a preferred embodiment of the heat dissipation fin strip gating structure of this utility model;

[0028] Figure 3 yes Figure 2 Enlarged view of a portion of the image;

[0029] Figure 4 This is a partial cross-sectional view of a preferred embodiment of the heat dissipation fin gating structure of this utility model;

[0030] Figure 5 This is a partial bottom view of a preferred embodiment of the heat dissipation fin gating structure of the present invention.

[0031] In the picture:

[0032] Main channel 1, branch channel 2, buffer platform 3, ingate 31, product cavity 4, product top plate cavity 41, heat dissipation fin cavity 42, side wall plate cavity 43, material cake 5, first junction 101, second junction 102. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0034] See Figure 1 In traditional gating systems, molten metal enters the branch channels via the main runner and then flows into the mold cavity through the gates, which are directly positioned at the base of the heat dissipation ribs. At high speeds near the gate, where the molten metal reaches its highest velocity within the entire mold cavity (50-60 m / s or even higher), the high-speed, high-pressure molten metal directly impacts the base of the heat dissipation ribs, accelerating erosion at that location. This gating system easily erodes the base of the heat dissipation ribs and hinders the flow of molten metal towards the top of the ribs, resulting in poor product molding.

[0035] To address the aforementioned problems, this application provides a gating structure and mold for heat dissipation fins, applicable to difficult-to-form energy storage boxes and radiator die-castings. Detailed descriptions follow. It should be noted that the order of description in the following embodiments is not intended to limit the preferred order of the embodiments of this application. Furthermore, the descriptions of each embodiment have their own emphasis; parts not detailed in a particular embodiment can be referred to in the relevant descriptions of other embodiments.

[0036] See Figure 2 and Figure 3 In one embodiment, the heat dissipation fins are provided with a gating structure, characterized in that they include a main channel 1, a plurality of branch channels 2, a buffer platform 3 and a product cavity 4 connected in sequence; one side of the buffer platform 3 is provided with an inner gate 31 connected to each branch channel 2, and the other side is connected to the product cavity 4.

[0037] In this embodiment, by setting a buffer platform 3 between the branch channel 2 and the product cavity 4, the molten metal passes through the buffer platform 3 before entering the product cavity 4 from the branch channel 2, preventing the molten metal from directly impacting the root of the heat dissipation ribs. By placing the ingate 31 on the buffer platform 3, when the molten metal reaches high speed at the gate position, this distance of the buffer platform 3 can decelerate the high-speed molten metal to a certain extent, reducing the speed at which the molten metal reaches the root of the heat dissipation ribs, thereby reducing erosion of the root of the heat dissipation ribs. This can effectively improve the defect of poor forming at the top of the heat dissipation ribs and increase the product yield.

[0038] Preferably, the buffer platform 3 is located along the branch channel 2 to the product cavity 4 (i.e., Figure 2 The width of the y-direction is 10-15mm.

[0039] See Figure 3 and Figure 4 Specifically, the product cavity 4 includes: a product top plate cavity 41, a plurality of heat dissipation rib cavities 42, and a side wall plate cavity 43; wherein the plurality of heat dissipation rib cavities 42 are spaced apart on the upper side of the product top plate cavity 41, and the root of each heat dissipation rib cavity 42 is connected to the upper surface of the product top plate cavity 41; the side wall plate cavity 43 is located on the lower side of the product top plate cavity 41, and the top of the side wall plate cavity 43 is connected to the four sides of the product top plate cavity 41; and the side wall plate cavity 43 and the outer wall of each heat dissipation rib cavity 42 form a first junction 101, and the buffer platform 3 is connected to the side wall plate cavity 43 located immediately below the first junction 101.

[0040] See Figure 5 The lower surface of the top plate cavity 41 and the inner surface of the side wall cavity 43 of the product form a second junction 102; the second junction 102 is provided with rounded corners.

[0041] For example, Figure 4 , Figure 5 R1 and R2 in the figure are the fillets at the second junction 102. By setting fillets, the molten metal can be smoothly and effectively diverted at this point.

[0042] In this embodiment, preferably, see Figure 4 and Figure 5 The radius of the rounded corner at the second junction 102 on the side closest to the buffer platform 3 is larger than the rounded corners on the other sides.

[0043] It is understood that the four sides of the top plate cavity 41 and the side wall cavity 43 all form a second junction 102; the fillet of the second junction 102 on three sides can be R2, while the fillet of the second junction 102 on the side closer to the buffer platform 3 is R1. The radius of the fillet R1 is larger than the radius of the fillet R2.

[0044] In this embodiment, by increasing the radius of the fillet R1, the molten metal can fill the top of the heat dissipation fin cavity 42 more smoothly, reducing under-casting. In the subsequent pressurization stage, it also better compensates for the shrinkage of the heat dissipation fins, reducing poor forming of the fins and increasing product yield.

[0045] Preferably, the radius of the rounded corner at the second junction 102 near the side of the buffer platform 3 can be 5-8 mm.

[0046] Optionally, the radius of the fillet R2 can be around 3mm.

[0047] See Figure 2 The plurality of heat dissipation rib cavities 42 are spaced apart along the x-direction; the buffer platform 3 extends along the x-direction. Optionally, the buffer platform 3 may consist of several segments, which can be specifically set according to the density of the heat dissipation rib cavities 42.

[0048] Optionally, the main channel 1 is connected to a material cake 5.

[0049] Based on the above embodiments, one embodiment of this application provides a mold including the heat dissipation rib gating structure as described above.

[0050] In summary, the gating structure for the heat dissipation ribs of this invention, by setting a buffer platform 3 between the branch channel 2 and the product cavity 4, ensures that the molten metal passes through the buffer platform 3 before entering the product cavity 4 from the branch channel 2, preventing the molten metal from directly impacting the root of the heat dissipation ribs. By placing the ingate 31 on the buffer platform 3, when the molten metal reaches high speed at the gate position, this distance of the buffer platform 3 can decelerate the high-speed molten metal, reducing the speed at which the molten metal reaches the root of the heat dissipation ribs, thereby reducing erosion at the root of the heat dissipation ribs. This can effectively improve the defect of poor forming at the top of the heat dissipation ribs. Furthermore, by increasing the radius of the fillet R1, the filling of the top of the heat dissipation rib cavity 42 with molten metal can be smoother, reducing the occurrence of under-casting. In the subsequent pressurization stage, it can also better compensate for the shrinkage of the heat dissipation ribs, reducing poor forming of the heat dissipation ribs and increasing the product yield.

[0051] It should be noted that all the devices (parts whose specific structures are not specified) selected in this application are general standard parts or parts known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0052] In the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "linking" should be interpreted broadly, for example, they can be fixed connections, detachable connections, or integral connections.

[0053] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0054] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A heat dissipation fin structure, characterized in that, It includes a main channel (1), several branch channels (2), a buffer platform (3), and a product cavity (4) connected in sequence; The buffer platform (3) has an inner gate (31) on one side that communicates with each branch channel (2), and the other side communicates with the product cavity (4).

2. The gating structure according to claim 1, characterized in that, The width of the buffer platform (3) along the direction from the branch channel (2) to the product cavity (4) is 10-15mm.

3. The gating structure according to claim 1, characterized in that, The product cavity (4) includes: a top plate cavity (41), multiple heat dissipation fin cavities (42), and a side wall plate cavity (43); wherein The plurality of heat dissipation rib cavities (42) are spaced apart on the upper side of the product top plate cavity (41), and the root of each heat dissipation rib cavity (42) is connected to the upper surface of the product top plate cavity (41). The sidewall cavity (43) is located below the top cavity (41) of the product, and the top of the sidewall cavity (43) is connected to the four sides of the top cavity (41); and The outer walls of the side wall cavity (43) and each heat dissipation rib cavity (42) form a first junction (101), and the buffer platform (3) is connected to the side wall cavity (43) located immediately below the first junction (101).

4. The gating structure according to claim 3, characterized in that, The lower surface of the top plate cavity (41) of the product and the inner surface of the side wall plate cavity (43) form a second junction (102); The second junction (102) is provided with rounded corners.

5. The gating structure according to claim 4, characterized in that, The radius of the fillet at the second junction (102) on the side closest to the buffer platform (3) is greater than that of the fillets on the other sides.

6. The gating structure according to claim 4, characterized in that, The radius of the rounded corner at the second junction (102) near the buffer platform (3) is 5-8 mm.

7. The gating structure according to claim 3, characterized in that, The plurality of heat dissipation rib cavities (42) are spaced apart along the x-direction; The buffer platform (3) extends along the x-direction.

8. The gating structure according to claim 7, characterized in that, The buffer platform (3) comprises several segments.

9. The gating and drainage structure according to claim 1, characterized in that, The main channel (1) is connected to the material cake (5).

10. A mold, characterized in that, Including the heat dissipation fin gating structure as described in any one of claims 1-9.

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