A runner structure of a heat-dissipating aluminum shell forming die
By optimizing the flow channel structure of the heat dissipation aluminum shell forming mold, multi-point guidance of aluminum liquid and thin-walled gate breakpoint design were realized, which solved the problem of damage to products caused by gate cutting and improved production efficiency and yield.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DONGGUAN HUANGFILL TECH CO LTD
- Filing Date
- 2025-09-05
- Publication Date
- 2026-08-04
AI Technical Summary
In the casting production of heat dissipation aluminum shells, the product is easily damaged during the gate cutting process, which increases the difficulty of deburring and affects assembly, reducing production efficiency and yield.
Design a flow channel structure for a heat dissipation aluminum shell molding die. The molten metal is guided into the mold cavity through multiple points and different directions, which slows down the injection speed of the molten aluminum. When the mold is closed, the cavity is filled and the residue and gas are discharged. After demolding, a thin-walled gate break point is formed, which facilitates the smoothing and separation of gate residue.
It improves the dimensional accuracy and production efficiency of the product, ensures casting quality, reduces the risk of damage to the product caused by gate residue, and increases the yield rate.
Smart Images
Figure CN224586956U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of die-casting mold technology, and in particular to a flow channel structure for a heat dissipation aluminum shell forming mold. Background Technology
[0002] In the casting production of aluminum heat sink shells, in order to ensure the appearance of the metal shell and the heat sink fins, the gate is usually set on the assembly end face of the metal shell and designed to be multi-point synchronous casting. However, during the process of cutting the gate after molding, because multiple gates are cut at the same time and the aluminum material is relatively soft, it is easy to have problems such as inconsistent gate cutting positions or even damage to the assembly end face of the aluminum shell, which increases the difficulty of subsequent deburring work and even affects the assembly of the aluminum shell.
[0003] To address the aforementioned issues, this invention modifies the main runner of the heat dissipation aluminum shell molding die to optimize the gate structure after molding, thereby resolving the problem of the gate damaging the product during the gate cutting operation. Utility Model Content
[0004] To address the problems existing in the prior art, this utility model provides a flow channel structure for a heat dissipation aluminum shell molding die. This structure can guide molten metal into the mold cavity from multiple points and in different directions. This not only slows down the speed at which the molten aluminum is injected into the cavity, thus reducing its impact on the mold cavity, but also ensures that the mold cavity is filled simultaneously during the mold closing process, while expelling any residues and gases, thus ensuring casting quality. Furthermore, it can form a thin-walled gate breakpoint at the connection between the product and the gate residue after demolding, making it easy to separate the gate residue from the product smoothly and evenly. The breakpoint is smooth and will not damage the product, thus improving production efficiency and yield.
[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:
[0006] A flow channel structure for a heat-dissipating aluminum shell molding die, the molding die including a front mold and a rear mold, the front mold having a liquid storage cylinder and a front mold core, the rear mold having a rear mold core, the front mold core being embedded in the front mold and having a first cavity formed on its end face facing the rear mold core, the rear mold core being embedded in the rear mold and having a second cavity formed on its end face facing the front mold core, the first cavity and the second cavity being able to match and engage during mold closing, forming a cavity adapted to the product therebetween, the cavity being connected to the liquid storage cylinder through a flow channel, wherein...
[0007] The first cavity is a groove adapted to the outer wall of the heat dissipation aluminum shell, the middle part of the rear mold core is provided with a core adapted to the inner wall of the heat dissipation aluminum shell, and the second cavity is provided on the bottom periphery and outer surface of the core.
[0008] The front mold core is provided with a flow channel boss extending toward the rear mold core, and a slope extending toward the groove and intersecting it at an inclination is formed on one side wall of the flow channel boss.
[0009] The rear mold core is provided with a main runner that is adapted to the contour of the runner boss but is relatively deep. The two ends of the main runner are respectively connected to the liquid storage cylinder and the second cavity. Several gates are formed on the main runner, and the end of each gate is connected to the second cavity. The rear mold core is also provided with one or more secondary runners. One end of each secondary runner is connected to the main runner, and the other end extends to the outside of the projection of the runner boss and is connected to the second cavity.
[0010] As a further explanation of the above technical solution:
[0011] In the above technical solution, a plurality of flow dividers are formed on the rear mold core within the main runner. One end of each flow divider is connected to the second cavity, and a gate is formed between two adjacent flow dividers. A gate boss is formed on the end of each flow divider facing the second cavity. The end face of each gate boss facing the front mold core is a plane and is flush with the bottom end of the cavity and can abut against the front mold core when the mold is closed.
[0012] In the above technical solution, two inclined surfaces, a first inclined surface and a second inclined surface, are formed on the side wall of the flow channel boss. The first inclined surface is smoothly connected to the flow channel boss, and the second inclined surface is connected to the groove and its projection falls on a plurality of the gate bosses.
[0013] In the above technical solution, the rear mold core is provided with a plurality of rear mold slag encasing grooves and venting channels at the end away from the flow channel, which are connected to the second cavity, and the front mold core is provided with a plurality of front mold slag encasing grooves that are adapted to the rear mold slag encasing grooves one by one.
[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: by setting a main runner and a secondary runner on the rear mold core, and forming several gates on the main runner, the molten metal can be guided into the mold cavity from multiple points and different directions. This not only slows down the speed of the molten aluminum entering the cavity, thereby reducing its impact on the mold cavity and improving the molding dimensional accuracy, but also ensures that the thicker or more complex parts of the cavity can be filled during the mold closing process and that the residues and gases inside can be discharged, ensuring casting quality. Furthermore, a thinner gate break point can be formed at the connection between the product and the gate residue after demolding, making it easy to separate the gate residue from the product smoothly and evenly. The break point is smooth and will not damage the product, thus improving the production efficiency and yield rate of the product. Attached Figure Description
[0015] Figure 1This is an exploded structural diagram of the front mold core and the rear mold core in this embodiment;
[0016] Figure 2 This is a cross-sectional view of the front mold core and the rear mold core during mold closing in this embodiment;
[0017] Figure 3 yes Figure 2 Enlarged view of section A in the middle;
[0018] Figure 4 This is a schematic diagram of the structure of the rear mold core in this embodiment;
[0019] Figure 5 yes Figure 4 Enlarged view of section B;
[0020] Figure 6 This is a schematic diagram of the front mold core in this embodiment;
[0021] Figure 7 yes Figure 6 Enlarged view of section C;
[0022] Figure 8 This is a schematic diagram of the structure of the heat dissipation aluminum shell after demolding, which is provided to you in this embodiment.
[0023] In the diagram: 10, liquid reservoir; 20, front mold core; 30, rear mold core; 41, main runner; 42, secondary runner; 50, manifold block; 60, heat dissipation aluminum shell; 1, first cavity; 2, second cavity; 3, core; 4, runner boss; 5, inclined surface; 51, first inclined surface; 52, second inclined surface; 6, gate; 7, gate boss; 8, flat surface; 11, rear mold slag groove; 12, venting channel; 13, front mold slag groove. Detailed Implementation
[0024] The present invention will now be described in further detail with reference to the accompanying drawings.
[0025] The embodiments described with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, 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, and therefore should not be construed as limiting this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "several" or "more than" means two or more, unless otherwise explicitly specified. In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. In this application, unless otherwise expressly specified and limited, "above" or "below" a second feature can include direct contact between the first and second features, or it can include contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of a second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" of a second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0026] like Figure 1-3 As shown, a flow channel structure for a heat-dissipating aluminum shell molding die is disclosed. The molding die includes a front die and a rear die. The front die has a liquid storage cylinder 10 and a front die core 20, and the rear die has a rear die core 30. The front die core 20 is embedded in the front die, and a first cavity 1 is formed on its end face facing the rear die core 30. The rear die core 30 is embedded in the rear die, and a second cavity 2 is formed on its end face facing the front die core 20. When the mold is closed, the first cavity 1 and the second cavity 2 can be matched and engaged, forming a cavity adapted to the product. The cavity is connected to the liquid storage cylinder 10 via a flow channel.
[0027] The first cavity 1 is a groove that fits the outer wall of the heat dissipation aluminum shell. The middle part of the rear mold core 30 is provided with a core 3 that fits the inner wall of the heat dissipation aluminum shell. The second cavity 2 is located on the bottom periphery of the core 3 and its outer surface.
[0028] The front mold core 20 is provided with a runner boss 4 extending toward the rear mold core 30, and a slope 5 is formed on one side wall of the runner boss 4 extending toward the groove and intersecting it at an inclination.
[0029] The rear mold core 30 has a main runner 41 that matches the contour of the runner boss 4 but is relatively deep. The two ends of the main runner 41 are connected to the liquid storage cylinder 10 and the second cavity 2, respectively. Several gates 6 are formed on the main runner 41, and the end of each gate 6 is connected to the second cavity 2. The rear mold core 30 also has one or more secondary runners 42. One end of each secondary runner 42 is connected to the main runner 41, and the other end extends to the outside of the projection of the runner boss 4 and is connected to the second cavity 2. In application, according to the actual situation of the mold, bosses or grooves that match the secondary runners 42 can be provided on the front mold core 20 to better cooperate with the secondary runners 42 so that the molten metal overflows from them.
[0030] like Figure 4-5 As shown, a number of flow dividers 50 are formed on the rear mold core 30 within the main runner 41. One end of each flow divider 50 is connected to the second cavity 2. A gate 6 is formed between two adjacent flow dividers 50. A gate boss 7 is formed on the end of each flow divider 50 facing the second cavity 2. The end face of each gate boss 7 facing the front mold core 20 is flat and flush with the bottom end of the cavity, and can abut against the front mold core 20 when the mold is closed.
[0031] like Figure 6-7 As shown, two inclined surfaces 51 and 52 with gradually increasing slopes and intersecting at an angle are formed on the side wall of the runner boss 4. The first inclined surface 51 is smoothly connected to the runner boss 4, and the second inclined surface 52 is connected to the groove and its projection falls on several gate bosses 7.
[0032] like Figure 4 , 6 As shown, the rear mold core 30 is provided with several rear mold slag enveloping grooves 11 and venting channels 12 connected to the second cavity 2 at the end far from the main channel 41, and the front mold core 20 is provided with several front mold slag enveloping grooves 13 that are adapted to the rear mold slag enveloping grooves 11.
[0033] like Figure 3As shown, during mold closing, the end face of the front mold core 20 is matched and fastened onto the secondary runner 42 of the rear mold core 30, and the runner boss 4 on it is matched and fastened onto the main runner 41. After completion, molten aluminum flows from the storage cylinder 10 into the main runner 41 of the rear mold core 30, and after being guided by the flow divider block 50, it flows into multiple gates 6 and secondary runners 42. The gates 6 guide the molten aluminum into the cavity from the side closest to the rear mold, which can slow down the speed of the molten aluminum entering the cavity, thereby reducing the impact force on the mold cavity and improving the molding dimensional accuracy. At the same time, the secondary runners 42 directly guide some of the molten aluminum to the thicker wall or more complex structure of the cavity for direct casting, ensuring that the cavity is filled with molten aluminum and the residue and gas in the cavity are discharged simultaneously during the mold closing process, ensuring casting quality. On the other hand, as Figure 8 As shown, after demolding, the heat dissipation aluminum shell 60 forms a gate residue 15 at the gate 6. The gate bosses 7 on both sides of the gate 6 cooperate with the first inclined surface 51 and the second inclined surface 52 on the front mold core 20 to form a gate breakpoint 14 with a relatively thin wall at the connection between the gate residue 15 and the heat dissipation aluminum shell 60. All gate breakpoints 14 are on a straight line. In subsequent operations, only a small external force needs to be applied at several gate breakpoints 14 to easily separate the gate residue 15 completely and flatly from the heat dissipation aluminum shell 60, and the flat breakpoint will not damage the heat dissipation aluminum shell 60.
[0034] This invention provides a main runner 41 and a secondary runner 42 on the rear mold core 30, and forms several gates 6 on the main runner 41. This allows molten metal to be guided into the mold cavity from multiple points and in different directions. This not only slows down the speed at which molten aluminum is injected into the cavity, thus reducing its impact on the mold cavity and improving the accuracy of the molding dimensions, but also ensures that the cavity with thick walls or complex structures can be filled during the mold closing process, and that residues and gases can be discharged, ensuring casting quality. Furthermore, a thin-walled gate breakpoint 14 can be formed at the connection between the product and the gate residue 15 after demolding, making it easy to separate the gate residue 15 smoothly from the product. The breakpoint is smooth and will not damage the product, thus improving production efficiency and yield.
[0035] The above does not limit the technical scope of this utility model. Any modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of this utility model shall still fall within the scope of the technical solution of this utility model.
Claims
1. A flow channel structure for a heat-dissipating aluminum shell forming mold, the forming mold comprising a front mold and a rear mold, the front mold having a liquid storage cylinder and a front mold core, the rear mold having a rear mold core, the front mold core being embedded in the front mold and having a first cavity formed on its end face facing the rear mold core, the rear mold core being embedded in the rear mold and having a second cavity formed on its end face facing the front mold core, wherein the first cavity and the second cavity can be matched and engaged during mold closing, forming a cavity adapted to the product therebetween, the cavity being connected to the liquid storage cylinder through a flow channel; characterized in that, The first cavity is a groove adapted to the outer wall of the heat dissipation aluminum shell, the middle part of the rear mold core is provided with a core adapted to the inner wall of the heat dissipation aluminum shell, and the second cavity is provided on the bottom periphery and outer surface of the core. The front mold core is provided with a flow channel boss extending toward the rear mold core, and a slope extending toward the groove and intersecting it at an inclination is formed on one side wall of the flow channel boss. The rear mold core is provided with a main runner that is adapted to the contour of the runner boss but is relatively deep. The two ends of the main runner are respectively connected to the liquid storage cylinder and the second cavity. Several gates are formed on the main runner, and the end of each gate is connected to the second cavity. The rear mold core is also provided with one or more secondary runners. One end of each secondary runner is connected to the main runner, and the other end extends to the outside of the projection of the runner boss and is connected to the second cavity.
2. The flow channel structure of the heat dissipation aluminum shell forming mold according to claim 1, characterized in that, The rear mold core has several flow dividers formed in the main runner. One end of each flow divider is connected to the second cavity. A gate is formed between two adjacent flow dividers. A gate boss is formed at the end of each flow divider facing the second cavity. The end face of each gate boss facing the front mold core is flat and flush with the bottom end of the cavity, and can abut against the front mold core when the mold is closed.
3. The flow channel structure of the heat dissipation aluminum shell forming mold according to claim 2, characterized in that, The sidewall of the flow channel boss has two inclined surfaces, a first inclined surface and a second inclined surface, which gradually increase in slope and intersect at an angle. The first inclined surface is smoothly connected to the flow channel boss, and the second inclined surface is connected to the groove and its projection falls on a plurality of the gate bosses.
4. The flow channel structure of a heat-dissipating aluminum shell forming mold according to any one of claims 1-3, characterized in that, The rear mold core is provided with several rear mold slag encapsulation grooves and venting channels at the end away from the flow channel, which are connected to the second cavity. The front mold core is provided with several front mold slag encapsulation grooves that are adapted to the rear mold slag encapsulation grooves one by one.