New energy automobile engine cylinder body die-casting die

Abstract

The utility model relates to die casting mould technical field, concretely relates to a new energy automobile engine cylinder body die casting mould for making molten metal material into cylinder body, including the injection end's fixed mould component of die casting machine and the movable end's movable mould component of die casting machine, the fixed mould component includes fixed mould plate and installs the fixed mould cavity board in fixed mould plate interior, the movable mould component includes the fixed seat on die casting machine, and the fixed seat has the movable mould plate fixedly, installs the movable mould cavity board in the movable mould plate, the fixed mould cavity board and movable mould cavity board all are provided with the die cavity for shaping cylinder body in, the die cavity is provided with two first core and second core that can move and can butt joint into an organic whole, the utility model discloses by adopting first core and second core can splice into a whole, the product demoulding after forming is convenient, has solved the traditional casting demoulding stagnation problem.

Description

Technical Field

[0001] This utility model relates to the field of die casting mold technology, specifically a die casting mold for a new energy vehicle engine cylinder block. Background Technology

[0002] New energy vehicles, as a core transportation tool for addressing the energy crisis and environmental pollution, have experienced explosive growth in recent years driven by both policy support and technological innovation. As the core power component of new energy vehicles, engine blocks currently mostly utilize lightweight alloy materials such as aluminum and magnesium alloys. Die casting, due to its advantages of high forming efficiency, good casting density, high material utilization, and the ability to achieve integrated molding of complex structures, has become the mainstream forming method for engine blocks. The performance of the die casting mold directly determines the quality, production efficiency, and production cost of the cylinder block casting. Currently, die casting molds for new energy vehicle engine blocks have formed a relatively mature basic structure in practical applications, typically including core components such as a fixed mold, moving mold, cavity, gating system, cooling system, and demolding mechanism. During the die casting process, molten lightweight alloy is injected into the mold cavity through the gating system, cooled and solidified by the cooling system, and then the demolding mechanism separates the casting, ultimately yielding the engine block blank.

[0003] As new energy vehicles develop towards higher power and higher integration, the structural design of engine cylinder blocks is becoming increasingly complex. This not only requires precise oil passages, water channels, and mounting interfaces, but also places more stringent demands on the dimensional accuracy, surface roughness, and internal defect control of castings. The forming of the hollow structure inside the cylinder block relies on a core component in the mold. The core must be placed inside the mold cavity beforehand. After the molten alloy fills and solidifies, the core is removed from the casting, ultimately forming the hollow channel. Therefore, the structural design and motion control of the core directly determine the forming accuracy, surface quality, and production efficiency of the hollow structure inside the cylinder block. The hollow structure inside the engine cylinder block of new energy vehicles often features narrow channels. Fixed cores cannot adapt to such structures, and after forming, the core is prone to jamming with the inner wall of the casting, leading to casting breakage or core damage. Utility Model Content

[0004] The purpose of this utility model is to provide a die-casting mold for engine cylinder blocks of new energy vehicles. By using a first core and a second core, they can be spliced ​​into a whole, which facilitates the demolding of the molded product and solves the problem of jamming during demolding of traditional castings.

[0005] To address the problems of existing technologies, this utility model provides a die-casting mold for a new energy vehicle engine cylinder block, used to form the cylinder body from molten metal material. It includes a fixed mold assembly that can be installed on the injection end of a die-casting machine and a moving mold assembly installed on the movable end of the die-casting machine. The fixed mold assembly includes a fixed template and a fixed mold cavity plate installed inside the fixed template. The moving mold assembly includes a fixed seat installed on the die-casting machine, and a moving template is fixed on the fixed seat. A moving mold cavity plate is installed in the moving template. Both the fixed mold cavity plate and the moving mold cavity plate are provided with mold cavities for forming the cylinder body. Two movable first cores and second cores that can be joined together are provided in the mold cavities.

[0006] Preferably, the fixed template is provided with a gate for the molten metal to enter the mold, and a runner is also provided between the fixed template and the fixed mold cavity plate, and the gate is connected to the runner.

[0007] Preferably, the outer sides of the fixed template are further provided with first side hole forming components for making cylinder body side holes. The first side hole forming components include a first telescopic drive member installed on the fixed template and a first side hole forming rod connected to the output end of the first telescopic drive member. The first side hole forming rod passes through the fixed template and extends into the fixed mold cavity plate.

[0008] Preferably, a third telescopic drive component is fixedly provided on one side of the top of the moving template, a first slider is slidably provided on the moving template near the third telescopic drive component, and the output end of the third telescopic drive component is connected to the first slider, and the first slider is connected to the first core.

[0009] Preferably, a fourth telescopic drive component is fixedly provided on the other side of the top of the moving template, and a second slider is slidably provided on the moving template near the fourth telescopic drive component, and the second slider is fixedly connected to the second core.

[0010] Preferably, the moving template has second side hole forming components fixed on its other two sides for forming side holes of the cylinder body. The second side hole forming components include a second telescopic drive member installed on the moving template. The output end of the second telescopic drive member is connected to a second side hole forming rod, and the second side hole forming rod extends into the moving mold cavity plate.

[0011] Preferably, a push plate is slidably arranged between the two fixed seats. The push plate has several push rods that can push the cylinder body out of the cavity. The moving template and the push plate also have several return springs.

[0012] Preferably, the first and second sliders are further provided with limiting grooves, and the fixed template is provided with a limiting member for inserting into the limiting groove when the mold is closed.

[0013] The advantages of this utility model compared to the prior art are: This application addresses the problem of cylinder body jamming during demolding by proposing a solution through a collaborative structure of a first core and a second core. The first core is reciprocating, as is the second core, and the two cores can be joined together to form a single, complete core during the die-casting process. During die casting, after the molten metal is injected into the mold cavity according to process requirements, the joined first and second cores serve as forming references, directly acting on the interior of the molten metal to process the internal hollow structure of the cylinder body, ensuring that the shape and dimensions of the hollow structure meet design requirements. After the cylinder body solidifies and forms within the cavity, during the demolding stage, the first and second cores separate according to preset actions, gradually emerging from the hollow structure of the cylinder body along their respective reciprocating trajectories. This effectively improves the smoothness of the cylinder body demolding process, reduces damage to the cylinder body structure during demolding, and ensures the quality of the casting. To further improve forming accuracy, this application includes a limiting component at the joint between the first and second cores. When the first and second cores are joined as a whole, the limiting component can be inserted into the preset limiting grooves on the first and second sliders to form a rigid limiting constraint. This constraint structure can resist the injection pressure generated when the molten metal fills the cavity, preventing the first and second sliders from shifting backward under the injection pressure. This prevents the molten metal from seeping into the gap and forming flash due to the expansion of the core splicing gap. At the same time, it ensures the splicing positioning accuracy of the first and second cores, avoids the dimensional deviation of the cylinder body caused by core displacement, and ensures that the dimensions of the cylinder body meet the assembly requirements of the new energy vehicle engine. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural schematic diagram of a die-casting mold for a new energy vehicle engine cylinder block according to this utility model.

[0015] Figure 2 This is a first exploded structural diagram of a die-casting mold for a new energy vehicle engine cylinder block according to this utility model.

[0016] Figure 3 This is a schematic diagram of the second exploded structure of a die-casting mold for a new energy vehicle engine cylinder block according to this utility model.

[0017] Figure 4 This is a third exploded structural diagram of a die-casting mold for a new energy vehicle engine cylinder block according to this utility model.

[0018] Figure 5 This is a three-dimensional structural diagram of the fixed mold component of a die-casting mold for a new energy vehicle engine cylinder block according to this utility model.

[0019] Figure 6This is a three-dimensional structural diagram of the moving mold assembly of a die-casting mold for a new energy vehicle engine cylinder block according to this utility model.

[0020] The diagram is labeled as follows: 1. Fixed mold assembly; 11. Fixed template; 111. Gate; 12. Fixed mold cavity plate; 13. First side hole forming assembly; 131. First telescopic drive component; 132. First side hole forming rod; 14. Limiting component; 2. Moving mold assembly; 21. Fixed base; 22. Moving template; 23. Ejector plate; 231. Ejector rod; 24. Second side hole forming assembly; 241. Second telescopic drive component; 242. Second side hole forming rod; 25. Third telescopic drive component; 251. First slider; 252. First core; 26. Fourth telescopic drive component; 261. Second slider; 262. Second core; 27. Moving mold cavity plate; 3. Cylinder body. Detailed Implementation

[0021] To further understand the features, technical means, and specific objectives and functions achieved by this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments.

[0022] Reference Figures 1-6 As shown, this utility model provides a die-casting mold for a new energy vehicle engine cylinder block, used to form the cylinder body 3 from molten metal material. It includes a fixed mold assembly 1 that can be installed at the injection end of a die-casting machine and a moving mold assembly 2 installed at the movable end of the die-casting machine. The fixed mold assembly 1 includes a fixed template 11 and a fixed mold cavity plate 12 installed inside the fixed template 11. The fixed mold assembly 1 is a basic load-bearing and connecting component with high strength and rigidity (typically made of H13 mold steel). On one hand, it is fixedly connected to the injection end of the die-casting machine by bolts and other fasteners to ensure that the fixed mold assembly 1 does not shift during injection. On the other hand, the inner side of the fixed template 11 is used to install the fixed mold cavity plate 12, and the installation accuracy of the fixed mold cavity plate 12 is ensured by locating pins and other structures to avoid misalignment of the mold cavity due to plate offset. The moving mold assembly 2 includes a fixed base 21 mounted on the die casting machine, and a moving template 22 is fixed on the fixed base 21. A moving mold cavity plate 27 is installed in the moving template 22. Both the fixed mold cavity plate 12 and the moving mold cavity plate 27 are provided with mold cavities for forming the cylinder body 3. Two movable and interlocking first cores 252 and second cores 262 are provided in the mold cavity. In the mold closed state, the moving mold cavity plate 27 and the half mold cavity of the fixed mold cavity plate 12 are closed to form a complete outer contour forming space for the cylinder body 3. At the same time, the moving mold cavity plate 27 and the fixed mold cavity plate 12 have reserved core clearance grooves to accommodate the docking and separation movements of the first core 252 and the second core 262.

[0023] After the die-casting machine starts, its moving end drives the moving mold assembly 2 to move towards the fixed mold assembly 1. When the mating surfaces of the moving mold cavity plate 27 and the fixed mold cavity plate 12 come into contact, the semi-cavities of the two are tightly closed, forming a complete outer contour mold cavity of the cylinder body 3. At the same time, the first core 252 and the second core 262 move along a preset guide trajectory until they are joined together. After joining, the core is embedded in the closed mold cavity, and its outer side and the inner wall of the mold cavity together form a "forming space that is completely adapted to the cylinder body 3". After the mold is closed and the core is joined, the injection end of the die-casting machine injects molten metal material into the closed mold cavity through the injection channel interface of the fixed mold cavity plate 12. During the injection process, the molten metal rapidly fills the mold cavity under high pressure, while simultaneously enveloping the joined first core 252 and second core 262 until the mold cavity is completely filled. After the molten metal fills the mold cavity, it gradually cools and solidifies.

[0024] The fixed mold plate 11 is provided with a gate 111 for the molten metal to enter the mold. A runner is also provided between the fixed mold plate 11 and the fixed mold cavity plate 12, and the gate 111 is connected to the runner. The gate 111 is the "initial inlet and flow control node" for the molten metal to enter the mold. Its axis is coaxially aligned with the nozzle axis of the injection end of the die casting machine to ensure that the molten metal can be injected without leakage.

[0025] The outer sides of the fixed template 11 are also provided with first side hole forming components 13 for making side holes of cylinder body 3. The first side hole forming components 13 include a first telescopic drive 131 installed on the fixed template 11 and a first side hole forming rod 132 connected to the output end of the first telescopic drive 131. The first side hole forming rod 132 passes through the fixed template 11 and extends into the fixed mold cavity plate 12.

[0026] When the mold is closed, the first telescopic drive members 131 on both sides of the fixed mold plate 11 are started simultaneously, driving the first side hole forming rod 132 to extend along the guide hole, pass through the through hole of the fixed mold cavity plate 12 and extend into the mold cavity until the preset stroke is reached. After the molten metal is filled, it wraps around the first side hole forming rod 132. After solidification, the first side hole forming rod 132 is withdrawn to form a side hole.

[0027] A third telescopic drive member 25 is fixedly installed on one side of the top of the moving template 22. A first slider 251 is slidably installed on the moving template 22 near the third telescopic drive member 25, and the output end of the third telescopic drive member 25 is connected to the first slider 251. The first slider 251 is also connected to the first core 252. A fourth telescopic drive member 26 is fixedly installed on the other side of the top of the moving template 22. A second slider 261 is slidably installed on the moving template 22 near the fourth telescopic drive member 26, and the second slider 261 is fixedly connected to the second core 262.

[0028] The third telescopic drive component 25, serving as the dedicated power source for the first core 252, typically employs a servo electric cylinder or a high-precision hydraulic cylinder, and is rigidly fixed to the pre-set mounting base of the moving template 22 by bolts. Its core function is to output linear telescopic power, driving the first slider 251 to move the first core 252 along a preset trajectory, controlling the extension and retraction stroke of the first core 252. During mold closing, it drives the first core 252 to move towards the second core 262 to achieve docking. After mold opening, it drives the first core 252 to disengage from the hollow structure of the cylinder body 3. The fourth telescopic drive component 26, symmetrical in structure and complementary in function to the third telescopic drive component 25, serves as the dedicated power source for the second core 262, also employing a servo electric cylinder or a high-precision hydraulic cylinder, and is fixed to the side of the moving template 22 opposite to the third telescopic drive component 25. Its core function is to drive the second slider 261 to move the second core 262 by outputting linear telescopic power, and to work with the third telescopic drive 25 to realize the docking and separation of the two cores. When the mold is closed, it starts synchronously with the third telescopic drive 25 to ensure that the two cores move towards the middle at the same speed. When the mold is opened, it moves synchronously in the opposite direction with the third telescopic drive 25 to drive the second core 262 to smoothly detach from the hollow structure of the cylinder body 3.

[0029] Limiting grooves are also provided on the first slider 251 and the second slider 261. The fixed template 11 is provided with a limiting member 14 for inserting into the limiting groove when the mold is closed. The limiting member 14 is made of high-strength mold steel and is rigidly fixed to the bottom of the fixed template 11 by bolts. Its position corresponds to the limiting groove of the first slider 251 and the second slider 261 after the mold is closed. The cooperation between the limiting member 14 and the limiting groove can directly resist the thrust generated by injection, prevent the slider from moving backward, ensure the core docking and the stability of the mold cavity dimensions, and prevent defects such as casting flash and dimensional deviation caused by core displacement from the root.

[0030] The moving template 22 is fixed with second side hole forming components 24 on both sides for forming side holes of cylinder body 3. The second side hole forming components 24 include a second telescopic drive member 241 installed on the moving template 22. The output end of the second telescopic drive member 241 is connected to a second side hole forming rod 242, and the second side hole forming rod 242 extends into the moving mold cavity plate 27.

[0031] The second telescopic drive component 241 serves as the dedicated power source for the second side hole forming rod 242, and has pressure feedback and stroke limit functions. Its core function is to output linear telescopic power to drive the second side hole forming rod 242 to reciprocate along a preset axis: after mold closing, it drives the second side hole forming rod 242 to extend into the mold cavity of the moving mold cavity plate 27 to form the side hole forming space.

[0032] A push plate 23 is slidably arranged between the two fixed seats 21. The push plate 23 has several push rods 231 that can push the cylinder body 3 out of the cavity. There are also several return springs between the moving template 22 and the push plate 23.

[0033] The push plate 23 carries and fixes several push rods 231. By sliding back and forth along the fixed seat 21, it drives the push rods 231 to achieve the action of "extending push and retracting back to position". When pushing, the push rods 231 extend synchronously with the push plate 23, and the top end extends into the cavity and pushes the cylinder body 3, so that it is smoothly pushed out of the cavity of the moving mold cavity plate 27 until the cylinder body is separated from the inner wall of the cavity, so that the part picking mechanism can grab it.

[0034] The above embodiments only illustrate one or more implementations of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A die-casting mold for a new energy vehicle engine cylinder block, used to manufacture the cylinder body (3) from molten metal material, characterized in that: The assembly includes a fixed mold assembly (1) that can be installed at the injection end of the die casting machine and a moving mold assembly (2) that can be installed at the movable end of the die casting machine. The fixed mold assembly (1) includes a fixed template (11) and a fixed mold cavity plate (12) installed inside the fixed template (11). The moving mold assembly (2) includes a fixed seat (21) installed on the die casting machine, and a moving template (22) is fixed on the fixed seat (21). A moving mold cavity plate (27) is installed in the moving template (22). Both the fixed mold cavity plate (12) and the moving mold cavity plate (27) are provided with mold cavities for forming the cylinder body (3). Two movable and interlocking first cores (252) and second cores (262) are provided in the mold cavities.

2. The die-casting mold for a new energy vehicle engine block according to claim 1, characterized in that: The fixed template (11) is provided with a gate (111) for molten metal to enter the mold. A flow channel is also provided between the fixed template (11) and the fixed mold cavity plate (12). The gate (111) is connected to the flow channel.

3. The die-casting mold for a new energy vehicle engine block according to claim 1, characterized in that: The fixed template (11) is provided with a first side hole forming assembly (13) for making the side holes of the cylinder body (3) on both sides. The first side hole forming assembly (13) includes a first telescopic drive (131) installed on the fixed template (11) and a first side hole forming rod (132) connected to the output end of the first telescopic drive (131). The first side hole forming rod (132) passes through the fixed template (11) and extends into the fixed mold cavity plate (12).

4. The die-casting mold for a new energy vehicle engine block according to claim 1, characterized in that: A third telescopic drive member (25) is fixedly provided on one side of the top of the moving template (22). A first slider (251) is slidably provided on the moving template (22) near the third telescopic drive member (25). The output end of the third telescopic drive member (25) is connected to the first slider (251), and the first slider (251) is connected to the first core (252).

5. A die-casting mold for a new energy vehicle engine block according to claim 4, characterized in that: A fourth telescopic drive member (26) is fixedly installed on the other side of the top of the moving template (22). A second slider (261) is also slidably installed on the moving template (22) near the fourth telescopic drive member (26), and the second slider (261) is fixedly connected to the second core (262).

6. The die-casting mold for a new energy vehicle engine block according to claim 1, characterized in that: The moving template (22) has a second side hole forming assembly (24) fixed on both sides for forming the side holes of the cylinder body (3). The second side hole forming assembly (24) includes a second telescopic drive (241) mounted on the moving template (22). The output end of the second telescopic drive (241) is connected to a second side hole forming rod (242), and the second side hole forming rod (242) extends into the moving mold cavity plate (27).

7. The die-casting mold for a new energy vehicle engine block according to claim 1, characterized in that: A push plate (23) is slidably arranged between the two fixed seats (21). The push plate (23) has several push rods (231) that can push the cylinder body (3) out of the cavity. There are also several return springs between the moving template (22) and the push plate (23).

8. A die-casting mold for a new energy vehicle engine block according to claim 5, characterized in that: The first slider (251) and the second slider (261) are also provided with limiting grooves, and the fixed template (11) is provided with a limiting member (14) for inserting into the limiting groove when the mold is closed.

Images