Annular runner die-casting die of high-pressure casting product

Abstract

The utility model relates to the technical field of high-pressure die-casting dies, in particular to an annular runner die-casting die for high-pressure casting products, which comprises a movable die sleeve plate, a movable die core fixed in the center of the movable die sleeve plate, a forming cavity arranged in the middle of the movable die core and an annular runner positioned on the periphery of the forming cavity. The annular runner is provided with a plurality of flow gates, the flow gates are annularly arranged on the peripheries of the cooling fin ribs, and the opening directions of the flow gates are perpendicular to the arrangement direction of the cooling fin ribs. According to the scheme, the annular runner and the multi-inner-gate annular layout is adopted, so that metal liquid is synchronously injected into a cooling fin rib cavity in a multi-point mode, buffering of a stacked structure is weakened, filling is accelerated, and the metal liquid is prevented from being solidified and stagnated in advance; meanwhile, due to the design of the flow gates perpendicular to the arrangement direction of the radiating ribs, the pressure loss during die casting can be reduced, complete forming of the ribs is ensured, and the die casting quality is greatly improved.

Description

Technical Field

[0001] This utility model relates to the technical field of high-pressure die-casting molds, specifically to an annular flow channel die-casting mold for high-pressure die-casting products. Background Technology

[0002] High-pressure casting, as a highly efficient metal forming process, is widely used in the automotive, aerospace, and electronics industries, and is especially suitable for the mass production of complex structural parts. As the core equipment in high-pressure casting, the die-casting mold, its gating system, venting structure, and cavity design directly determine the forming quality and production efficiency of the die-cast parts.

[0003] For die-cast parts with heat sink fins, the dense distribution and large number of fins make incomplete filling during the die-casting process easy. Therefore, the structural design requirements for such molds are more stringent. The existing technology, "A Die-casting Mold for a Gasoline Engine Cylinder Head and Housing" (Publication No.: CN106077571A), discloses a die-casting mold for housings with heat sink fins, which achieves the die-casting filling of the heat sinks by setting the runner on the side of the cavity with the heat sink fins. However, the existing technology still has the following technical problems:

[0004] Because of the large number and dense distribution of heat sink fins, and the layered structure of the heat sink fin cavity, the filling distance is extended. In the existing technology, the flow channel is set on the side of the heat sink fin cavity, and the molten metal can only be filled in one direction. When the molten metal is rapidly pressed into the heat sink fin cavity under high pressure, the molten metal is easily buffered and slowed down by the layered structure. At the same time, the layered structure increases the cavity area, causing the molten metal that enters the cavity first to cool and solidify too quickly. The molten metal stops before it can contact the top or end of the heat sink fin cavity, so the shape of the heat sink fin cannot be fully formed, thereby reducing the quality of die casting. Utility Model Content

[0005] This utility model provides an annular flow channel die-casting mold for high-pressure casting products, which can solve the problem that in the prior art, when die-casting products with heat sink fin structures, the heat sink fins are easily not fully formed, thus reducing the quality of die casting.

[0006] This application provides the following technical solution: a ring-shaped runner die casting mold for high-pressure casting products, including a moving mold plate, a moving mold core fixed at the center of the moving mold plate, a forming cavity disposed in the middle of the moving mold core, and an annular runner located on the outer periphery of the forming cavity. One end of the forming cavity is provided with an annular heat dissipation fin. The annular runner is provided with multiple ingates. The ingates are arranged in a ring on the outer periphery of the heat dissipation fins, and the opening of the ingate is perpendicular to the arrangement direction of the heat dissipation fins.

[0007] Beneficial effects:

[0008] 1. Circular arrangement of multiple gates ensures high-quality die casting. A circular flow channel surrounds the outer periphery of the forming cavity, with multiple ingates arranged in a ring around the outer periphery of the heat sink fins. This allows molten metal to be injected simultaneously from multiple directions around the heat sink fins during filling. Compared to the existing one-sided, unidirectional filling method, this design presents a multi-point propulsion effect, reducing the buffering effect of the stacked structure of the heat sink fins on the flow of molten metal. More molten metal fills the heat sink fin cavity per unit time, resulting in a more saturated filling. This prevents the molten metal that first enters the cavity from cooling and solidifying too quickly, causing stagnation before reaching the end of the heat sink fin cavity. This effectively ensures complete forming of the heat sink fins and improves the quality of die casting.

[0009] 2. Since the gate is located around the circumference of the heat sink ribs, and the opening of the ingate is perpendicular to the arrangement direction of the heat sink ribs, the inflow path of the molten metal is perpendicular to the stacking direction of the heat sink ribs. The molten metal can simultaneously fill each layer of ribs in a radial manner. Compared with the existing technology that fills with only one side of the heat sink ribs, this solution has higher filling conduction efficiency. Even when facing multiple dense ribs, the filling pressure loss of each rib is smaller, effectively overcoming the attenuation effect of the stacked structure on the flow rate and ensuring the complete molding of the top and end ribs.

[0010] Furthermore, one end of the molding cavity is provided with an opposite exhaust groove, which is located at the end of the molding cavity away from the heat sink fin and is positioned opposite to the annular flow channel.

[0011] Beneficial effects: The annular flow channel and the opposite venting groove are set opposite to each other, so that the molten metal enters the molding cavity from the inner gate of the annular flow channel and exits from the opposite venting groove. The filling path is in one direction, which helps to shorten the filling distance, improve molding efficiency, reduce the design difficulty of the flow channel, and ensure the quality of die casting.

[0012] Furthermore, a lateral chamber is provided on one side of the molding cavity, and a lateral channel is also connected to the side of the annular flow channel, with the opening of the lateral channel located at the opening of the lateral chamber.

[0013] Beneficial effects: A lateral chamber is set on one side of the forming cavity, and the annular flow channel is connected to the lateral chamber through the lateral flow channel. The lateral flow channel can directionally introduce the molten metal from the annular flow channel into the lateral chamber, which can effectively fill the complex lateral structure and avoid the problems of insufficient filling and material shortage in the lateral area of ​​the forming cavity. At the same time, the flow energy of the molten metal in the lateral chamber can assist in the exhaust, squeezing out the gas in this area, reducing porosity defects and improving the forming quality.

[0014] Furthermore, the molding cavity is provided with an oblique air passage on the side away from the lateral chamber, and a side exhaust groove is provided outside the oblique air passage, with the opening of the side exhaust groove located at the opening of the oblique air passage.

[0015] Beneficial effects: After the molten metal flows into the main body of the molding cavity from the annular flow channel, some of the liquid flows directionally towards the side exhaust groove along the inclined air channel. The side exhaust groove, as an auxiliary exhaust channel, can guide the residual gas in the molding cavity to be discharged from the side exhaust groove outlet along the inclined path, avoiding the accumulation of gas in dead corner areas to form pores, thereby reducing molding defects and improving molding quality.

[0016] Furthermore, slag bags are also provided at the opening positions of the opposite side exhaust trough and the side exhaust trough.

[0017] Beneficial effects: During the die casting process, the molten metal will carry the oxide inclusions in the forming cavity into the slag bag. The slag bag plays a role in containing impurities and prevents residual impurities in the forming cavity from affecting the quality of the casting.

[0018] Furthermore, the opposite side exhaust trough and the side exhaust trough are also provided with a wave-shaped exhaust plate.

[0019] Beneficial effects: The wave-shaped exhaust plate structure, through its non-linear channel design, causes the high-pressure, high-speed molten aluminum to collide multiple times with the undulating channel surface as it flows through the exhaust plate, thus changing its direction. This reduces the flow rate of the molten aluminum through kinetic energy loss, preventing it from splashing out of the mold and improving the quality of the casting. Attached Figure Description

[0020] Figure 1 This is an isometric view of the present invention.

[0021] Figure 2 for Figure 1 The isometric view of the moving mold plate and its external connectors, as well as the moving mold core, has been removed.

[0022] Figure 3 for Figure 2 Axonometric views of the central annular flow channel, lateral flow channel, opposite exhaust channel, and side exhaust channel.

[0023] Figure 4 for Figure 2 Axonometric view of medium-pressure casting products. Detailed Implementation

[0024] The following detailed description illustrates the specific implementation method:

[0025] The markings in the accompanying drawings include: moving mold plate 1, venting plate 2, forming cavity 3, annular runner 4, side runner 401, moving mold core 5, die casting product 6, heat sink rib 601, side cavity 602, oblique air passage 603, opposite side venting groove 7, side venting groove 8, inner gate 9, slag bag 10.

[0026] Example 1

[0027] like Figures 1 to 4 As shown, an annular runner die casting mold for high-pressure casting products includes a moving mold plate 1, a moving mold core 5 fixed at the center of the moving mold plate 1, a forming cavity 3 disposed in the middle of the moving mold core 5, an annular runner 4 located on the outer periphery of the forming cavity 3, a venting groove 7 disposed opposite to the annular runner 4, a lateral runner 401 disposed on one side of the annular runner 4, and a side venting groove 8 disposed opposite to the lateral runner 401.

[0028] To facilitate the demonstration of the structure, Figure 1 The fixed mold plate and fixed mold core have been omitted. In addition, since the molding cavity 3 and all the runners are cavity runners formed after the mold is closed, for ease of display of the structure, Figure 2 and Figure 3 All flow channel structures were represented by solid castings formed by die casting. Figure 4 The die-cast part 6 after die casting is used to represent the forming cavity 3.

[0029] like Figure 4 As shown, a lateral cavity 602 is provided on one side of the die-cast product 6, and the cavity structure of the lateral cavity 602 extends laterally into the die-cast product 6. Figure 4 The angle relationship causes the lateral chamber 602 to be blocked, but it does not affect the explanation of this solution; an inclined air passage 603 is provided on the side of the die-cast product 6 away from the lateral chamber 602, and the cavity of the inclined air passage 603 extends into the die-cast product 6 in an inclined state; an annular heat sink rib 601 is also provided at one end of the die-cast product 6.

[0030] like Figure 2 and Figure 3 As shown, the annular flow channel 4 is provided with multiple ingates 9, which are arranged in a ring on the outer periphery of the heat sink fins 601, and the openings of the ingates 9 are perpendicular to the transverse arrangement direction of the heat sink fins 601. Figure 3 As shown, the lateral flow channel 401 is disposed on one side of the annular flow channel 4, and the opening of the lateral flow channel 401 at the end away from the annular flow channel 4 is located at... Figure 4 The opening of the central lateral chamber 602. The side exhaust groove 8 is located on the opposite side of the lateral flow channel 401, and the opening of the side exhaust groove 8 is set at... Figure 4 At the opening of the oblique airway 603.

[0031] like Figure 2 and Figure 3 As shown, the opposite venting groove 7 is arranged opposite to the annular flow channel 4. The opposite venting groove 7 is also an annular structure surrounding the outer periphery of one end of the die-cast product. The opening positions of the opposite venting groove 7 and the side venting groove 8 connected to the die-cast product 6 are provided with slag pockets 10. The opposite venting groove 7 and the side venting groove 8 are provided with wavy venting plates 2 at the ends away from the slag pockets 10. The venting plate 2 is a cavity structure formed by merging the moving mold sleeve plate 1 and the fixed mold sleeve plate. In order to facilitate the display of its structure, the venting plate 2 in the attached drawings of this specification all indicate the mold body that forms the cavity structure of the venting plate 2.

[0032] The usage method of this solution is as follows:

[0033] like Figure 2 and Figure 3 As shown, high-pressure molten metal is injected from the annular flow channel 4, passes through multiple inner gates 9, and then enters... Figure 1 Within the forming cavity 3, a portion of the molten metal simultaneously fills the cavity of the heat sink rib 601 from multiple directions around its circumference, while another portion enters the forming cavity 3 from the side flow channel 401. After the entire forming cavity 3 is filled, it flows out from the opposite side venting channel 7 and the side venting channel 8, and is discharged after passing through the slag bag 10 and the venting plate 2. The filling method of the heat sink rib 601 exhibits a multi-point propulsion effect, reducing the buffering effect of the layered structure of the heat sink rib 601 on the flow of molten metal. Within a unit time, more molten metal is filled into the cavity of the heat sink rib 601, resulting in a more saturated filling. This avoids the situation where the molten metal that first enters the cavity cools and solidifies too quickly, causing stagnation before reaching the end of the cavity, effectively ensuring the complete forming of the heat sink rib 601 and improving the quality of die casting. In addition, since the ingate 9 is located around the heat sink rib 601, and the opening of the ingate 9 is perpendicular to the arrangement direction of the heat sink rib 601, the inflow path of the molten metal filling is perpendicular to the stacking direction of the heat sink rib 601. The molten metal can simultaneously fill each layer of ribs in a radial manner. Compared with the existing technology that fills with only one side of the heat sink rib 601, this solution has higher filling conduction efficiency. Even when facing multiple dense ribs, the filling pressure loss of each layer of ribs is smaller, effectively overcoming the attenuation effect of the stacked structure on the flow rate and ensuring the complete forming of the top and end ribs.

[0034] The above are merely embodiments of this utility model, and the utility model is not limited to the field covered by this embodiment. Commonly known structures and characteristics in the solutions are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A ring-shaped flow channel die-casting mold for high-pressure casting products, characterized in that: It includes a moving mold plate, a moving mold core fixed at the center of the moving mold plate, a molding cavity disposed in the middle of the moving mold core, and an annular runner located on the outer periphery of the molding cavity. One end of the molding cavity is provided with an annular heat dissipation fin. The annular runner is provided with multiple ingates. The ingates are arranged in annular shape on the outer periphery of the heat dissipation fins, and the opening of the ingate is perpendicular to the arrangement direction of the heat dissipation fins.

2. The annular flow channel die-casting mold for high-pressure casting products according to claim 1, characterized in that: One end of the molding cavity is also provided with an opposite exhaust groove, which is located at the end of the molding cavity away from the heat sink fins and is positioned opposite to the annular flow channel.

3. The annular flow channel die-casting mold for high-pressure casting products according to claim 2, characterized in that: A lateral chamber is provided on one side of the molding cavity, and the side of the annular flow channel is also connected to... The lateral flow channel has its opening located at the opening of the lateral chamber.

4. The annular runner die-casting mold for high-pressure casting products according to claim 3, characterized in that: The molding cavity is provided with an oblique air passage on the side away from the lateral chamber, and a side exhaust groove is provided outside the oblique air passage, with the opening of the side exhaust groove located at the opening of the oblique air passage.

5. The annular runner die-casting mold for high-pressure casting products according to claim 4, characterized in that: The openings of the opposite and side exhaust channels are also provided with slag bags.

6. The annular runner die-casting mold for high-pressure casting products according to claim 5, characterized in that: The opposite and side exhaust channels are also equipped with wavy exhaust plates.

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