A die-casting mold structure for floodlight heat sinks

Abstract

This utility model discloses a die-casting mold structure for floodlight radiators, including a lower mold plate, a lower mold core, an upper mold plate, and an upper mold core. The upper mold plate has a material outlet, and the lower mold core has a downwardly recessed main forming cavity. Outside the main forming cavity is a downwardly recessed annular flange cavity, and the annular flange cavity has several downwardly recessed heat dissipation fin cavities arranged circumferentially, with all three interconnected. The lower mold core has several linearly arranged flow channels near the material outlet, which communicate with the material outlet and the annular flange cavity. The upper mold core has a forming core that is embedded downwards into the main forming cavity. This structure evenly guides the molten material into the annular flange cavity through the flow channels, and then distributes it to the main forming cavity and the heat dissipation fin cavities. Combined with the forming core for shaping, it effectively solves the problem of uneven material distribution, improves the forming quality and production efficiency of the radiator, and is suitable for mass die-casting production of floodlight radiators.

Description

Technical Field

[0001] This utility model relates to the field of die-casting mold technology, and in particular to a die-casting mold structure for floodlight heat sinks. Background Technology

[0002] In the manufacturing of floodlights, the heat sink is a core component that ensures the long-term stable operation of the lamp. Its structural rationality and molding quality directly affect the heat dissipation efficiency and service life of the floodlight. Currently, floodlight heat sinks are mostly mass-produced using die casting technology. This technology has become the mainstream technical means for heat sink manufacturing due to its advantages such as high molding efficiency, good dimensional accuracy, and suitability for processing complex structural parts.

[0003] Die-casting molds for floodlight radiators typically consist of upper and lower mold plates forming the core mold-closing structure. During production, the precise closing of the upper and lower mold plates creates a cavity that matches the shape of the radiator. High-temperature molten metal is then injected into the cavity through an injection system. After the molten metal cools and solidifies, the mold is opened and the formed part is removed, completing the entire die-casting process. However, with the increasing power and miniaturization trends of floodlights, the radiator shell needs to be equipped with numerous densely arranged heat dissipation fins to increase the heat dissipation area and meet the requirements for efficient heat dissipation.

[0004] This structural feature places extremely high demands on the design of the internal cavity flow channels of the die-casting mold. In existing technologies, due to the presence of heat dissipation fins, the internal space of the cavity is divided into multiple complex branch regions. After the molten metal is injected from the sprue, it needs to be rapidly filled into the gaps between the fins and the main body of the shell under high pressure. However, in actual production, uneven distribution of the molten metal often occurs: some areas suffer from insufficient filling of the molten metal, resulting in defects such as material shortages and shrinkage cavities, while other areas develop excessively thick solidified layers due to molten metal accumulation, affecting the structural strength and heat dissipation performance of the radiator.

[0005] Among these challenges, the material distribution process from the sprue to the mold cavity has become a key factor restricting molding quality. Traditional single-sprue or simple material distribution structures are ill-suited to the filling requirements of multi-finned, dispersed cavities. During flow, the molten material is prone to uneven velocity due to differences in path resistance, preferentially filling areas with lower resistance while leaving the gaps between the fins with higher resistance unfilled. Further improvements are needed. Utility Model Content

[0006] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a die-casting mold structure for a floodlight heat sink.

[0007] A die-casting mold structure for a floodlight heat sink designed for this purpose includes a lower mold plate, a lower mold core, an upper mold plate, and an upper mold core;

[0008] The upper template is provided with a material inlet;

[0009] The lower mold core is provided with a downwardly recessed main forming cavity, and a downwardly recessed annular flange cavity is provided on the outside of the main forming cavity. A plurality of downwardly recessed heat dissipation fin cavities are arranged in a circumferential array along the annular flange cavity. The heat dissipation fin cavities are interconnected with the main forming cavity and the annular flange cavity.

[0010] The lower mold core is provided with several flow channels on the side near the material outlet. The flow channels are arranged in a straight line and are interconnected with the material outlet and the annular flange cavity.

[0011] The upper mold core is provided with a molding core that is embedded downward into the main molding cavity.

[0012] Preferably, the lower surface of the upper mold core is provided with an upwardly recessed feed channel, which is connected to the material outlet.

[0013] Several material distribution blocks are arranged in a straight line inside the feed channel. A material distribution cavity that communicates with the feed channel is provided between two adjacent material distribution blocks. The material distribution cavity is vertically opposite to and communicates with the flow channel.

[0014] Preferably, the lower mold core is provided with a plurality of downwardly recessed slag discharge grooves, which are in communication with the annular flange cavity;

[0015] The slag discharge trough and the diversion trough are respectively located on opposite sides of the main forming cavity.

[0016] Preferably, the lower surface of the upper mold core is provided with a slag receiving tank that communicates with the slag discharge tank.

[0017] Preferably, the lower template is fixedly connected to the lower mold core.

[0018] Preferably, the upper template is fixedly connected to the upper mold core.

[0019] Compared with existing technologies, this invention features several linearly arranged flow channels on the side of the lower mold core near the sprue. These channels rapidly divert the molten metal injected from the sprue and guide it to the annular flange cavity. This avoids the problem of excessive flow resistance differences caused by traditional single sprue or simple material distribution structures, allowing the molten metal to enter the annular flange cavity more evenly. Simultaneously, since the annular flange cavity is interconnected with the main forming cavity and the heat dissipation fin cavity, the molten metal dispersed by the flow channels can flow synchronously from multiple directions to the main forming cavity and each heat dissipation fin cavity via the annular structure of the annular flange cavity. This significantly improves the uniformity of molten metal distribution in complex cavities and effectively reduces defects such as material shortages, shrinkage cavities, and excessively thick solidified layers caused by molten metal accumulation. Attached Figure Description

[0020] Figure 1 This is one of the cross-sectional structural schematic diagrams of this utility model;

[0021] Figure 2 This is the second cross-sectional structural schematic diagram of the present invention;

[0022] Figure 3 This is one of the schematic diagrams of the three-dimensional structure of the lower mold core;

[0023] Figure 4 This is the second schematic diagram of the three-dimensional structure of the lower mold core;

[0024] Figure 5 This is a schematic diagram of the three-dimensional structure of the upper mold core;

[0025] Figure 6 This is a three-dimensional structural diagram of the heat sink. Detailed Implementation

[0026] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein 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 specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0028] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly indicating the number, specific order, or primary and secondary relationship of the indicated technical features.

[0029] In this document, the term "implementation" means that a specific feature, structure, or characteristic described in connection with an implementation may be included in at least one implementation of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same implementation, nor is it a separate or alternative implementation mutually exclusive with other implementations. It will be explicitly and implicitly understood by those skilled in the art that the implementations described herein can be combined with other implementations.

[0030] In the description of the embodiments 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, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0031] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple groups" refers to two or more (including two groups), and "multiple pieces" refers to two or more (including two pieces).

[0032] In the description of the embodiments of this application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", 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 the embodiments of 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 the embodiments of this application.

[0033] In the description of the embodiments of this application, unless otherwise explicitly specified and limited, the technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0034] See Figures 1-6A die-casting mold structure for a floodlight heat sink includes a lower mold plate 10, a lower mold core 20, an upper mold plate 30, and an upper mold core 40. The upper mold plate 30 is provided with a material outlet 300. The lower mold core 20 is provided with a downwardly recessed main forming cavity 210, which is used to form the main shell 50 of the heat sink. A downwardly recessed annular flange cavity 220 is provided on the outer side of the main forming cavity 210, which is used to form the shell flange 510 of the heat sink. A plurality of downwardly recessed... The recessed heat dissipation fin cavity 230 is used to form the heat dissipation fins 520 of the heat sink. The heat dissipation fin cavity 230 is interconnected with the main forming cavity 210 and the annular flange cavity 220. The lower mold core 20 is provided with a plurality of flow channels 240 on the side near the material outlet 300. The flow channels 240 are arranged in a straight line and are interconnected with the material outlet 300 and the annular flange cavity 220. The upper mold core 40 is provided with a forming mold core 410 that is embedded downward into the main forming cavity 210.

[0035] The working principle of this die-casting mold structure used for floodlight heat sinks is as follows:

[0036] During the die-casting process of the floodlight radiator, the lower mold plate 10 and the upper mold plate 30 are first precisely closed, so that the lower mold core 20 and the upper mold core 40 fit tightly together. At this time, the forming core 410 of the upper mold core 40 is precisely embedded downward into the main forming cavity 210 of the lower mold core 20, together forming a closed cavity system that matches the shape of the radiator. The main forming cavity 210 corresponds to the forming space of the main shell 50 of the radiator, the annular flange cavity 220 corresponds to the forming space of the shell flange 510, and the circumferential array of heat dissipation fin cavities 230 corresponds to the forming space of the heat dissipation fins 520.

[0037] After the mold is closed, the high-temperature molten metal is injected into the mold through the sprue 300 of the upper mold plate 30. After entering, the molten metal first flows into several linearly arranged distribution channels 240 on the side of the lower mold core 20 near the sprue 300. With the dispersing effect of the distribution channels 240, the molten metal is evenly distributed and guided to the annular flange cavity 220. Since the distribution channels 240 are directly connected to the annular flange cavity 220, and the annular flange cavity 220 has an annular structure, the molten metal spreads rapidly in the annular flange cavity 220. Taking advantage of its interconnection with the main forming cavity 210 and the heat dissipation fin cavity 230, it flows and fills the main forming cavity 210 and each heat dissipation fin cavity 230 simultaneously from multiple directions.

[0038] During the filling process, the forming core 410 plays a shaping role in the liquid material in the main forming cavity 210, ensuring the shape accuracy of the radiator main shell 50. The interconnected design of the annular flange cavity 220 and the heat dissipation fin cavity 230 ensures that the liquid material can fully enter each heat dissipation fin cavity 230, so that the heat dissipation fins 520 are completely formed. After all cavities are completely filled with liquid material and cooled and solidified, the upper mold plate 30 separates from the lower mold plate 10, the upper mold core 40 rises with the upper mold plate 30, and the formed radiator (including the main shell 50, shell flange 510 and heat dissipation fins 520) is ejected from the cavity of the lower mold core 20, completing one die casting operation.

[0039] See Figure 5 The lower surface of the upper mold core 40 is provided with an upwardly recessed feed channel 430, which is interconnected with the sprue 300. Several material distribution blocks 440 are arranged in a straight line within the feed channel 430. A material distribution cavity 450, interconnected with the feed channel 430, is provided between adjacent material distribution blocks 440. The material distribution cavity 450 is vertically opposite to and interconnected with the flow channel 240. After mold closing, the molten material enters the feed channel 430 on the lower surface of the upper mold core 40 through the sprue 300. The linearly arranged material distribution blocks 440 within the feed channel divide the molten material into the material distribution cavities 450 between adjacent material distribution blocks. The material distribution cavities correspond vertically to and are interconnected with the flow channel 240 of the lower mold core, allowing the molten material to be precisely guided into each flow channel through the material distribution cavity, and then fill the cavity along the original path, achieving a more uniform material distribution effect.

[0040] See Figure 3 and Figure 4 The lower mold core 20 is provided with several downwardly recessed slag discharge grooves 250, which are interconnected with the annular flange cavity 220. The slag discharge grooves 250 and the flow distribution grooves 240 are respectively located on opposite sides of the main forming cavity 210. When the molten material fills the cavity, because the slag discharge grooves 250 are connected to the annular flange cavity 220, and the slag discharge grooves and flow distribution grooves 240 are respectively located on opposite sides of the main forming cavity 210, after the annular flange cavity and each connected cavity are filled with molten material, the excess molten material will continue to flow along the annular flange cavity with the material flow and enter the slag discharge grooves, avoiding excessive accumulation of excess molten material in the cavity, which would affect the forming accuracy and ensure the forming quality of the radiator.

[0041] See Figure 5 The lower surface of the upper mold core 40 is provided with a slag-receiving groove 460 that communicates with the slag discharge groove 250. The slag-receiving groove 460 on the lower surface of the upper mold core 40 is connected to the slag discharge groove 250, which can significantly increase the total volume for holding excess liquid. It can receive more excess liquid flowing into the slag discharge groove 250 from the annular flange cavity 220, avoiding the backflow of excess liquid into the molding cavity due to insufficient volume of the slag discharge groove, which would affect the molding accuracy of the product and further ensure the molding quality of the radiator.

[0042] In this utility model, the lower template 10 is fixedly connected to the lower mold core 20.

[0043] In this utility model, the upper template 30 is fixedly connected to the upper mold core 40.

[0044] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A die-casting mold structure for a floodlight heat sink, characterized in that: It includes a lower template (10), a lower mold core (20), an upper template (30), and an upper mold core (40); The upper template (30) is provided with a material inlet (300); The lower mold core (20) is provided with a downwardly recessed main forming cavity (210), and a downwardly recessed annular flange cavity (220) is provided on the outside of the main forming cavity (210). A plurality of downwardly recessed heat dissipation fin cavities (230) are arranged in a circumferential array along the annular flange cavity (220). The heat dissipation fin cavity (230) is interconnected with the main forming cavity (210) and the annular flange cavity (220). The lower mold core (20) is provided with a plurality of flow channels (240) on the side near the material outlet (300). The flow channels (240) are arranged in a straight line and are interconnected with the material outlet (300) and the annular flange cavity (220). The upper mold core (40) is provided with a molding core (410) that is embedded downward into the main molding cavity (210).

2. The die-casting mold structure for a floodlight heat sink according to claim 1, characterized in that: The lower surface of the upper mold core (40) is provided with an upwardly recessed feed channel (430), which is connected to the feed port (300). The feed channel (430) has several material distribution blocks (440) arranged in a straight line. Between two adjacent material distribution blocks (440), there is a material distribution cavity (450) that communicates with the feed channel (430). The material distribution cavity (450) is vertically opposite to the flow channel (240) and communicates with it.

3. The die-casting mold structure for a floodlight heat sink according to claim 1, characterized in that: The lower mold core (20) is provided with a plurality of downwardly recessed slag discharge grooves (250), and the slag discharge grooves (250) are interconnected with the annular flange cavity (220); The slag discharge trough (250) and the diversion trough (240) are respectively located on opposite sides of the main forming cavity (210).

4. The die-casting mold structure for a floodlight heat sink according to claim 3, characterized in that: The lower surface of the upper mold core (40) is provided with a slag receiving tank (460) that is connected to the slag discharge tank (250).

5. The die-casting mold structure for a floodlight heat sink according to claim 1, characterized in that: The lower template (10) is fixedly connected to the lower mold core (20).

6. The die-casting mold structure for a floodlight heat sink according to claim 1, characterized in that: The upper template (30) is fixedly connected to the upper mold core (40).

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