High-pressure extrusion casting mold for flywheel housing of new energy automobile

Abstract

The invention belongs to the technical field of die-casting dies, and provides a high-pressure extrusion casting die for a flywheel housing of a new energy automobile, the high-pressure extrusion casting die comprises a fixed die assembly, a movable die assembly, an ejection mechanism and a mold core mechanism, the ejection mechanism comprises an ejector pin push plate and a pull rod, and the mold core mechanism comprises a first mold core block group and a second mold core block group which are driven independently; the core mechanism further comprises an internal core block and a connecting rod mechanism; the internal core block is connected to the pull rod; the connecting rod mechanism comprises connecting rods arranged corresponding to the second mold core blocks. Compared with the prior art, the first mold core block group and the second mold core block group which are driven independently are arranged and matched with the internal mold core blocks and the connecting rod mechanism, so that the internal mold core blocks are connected with the pull rod and are in transmission connection with the first mold core blocks, and the connecting rod mechanism is connected with the ejector pin push plate and the second mold core blocks; independent driving and synchronous linkage of the first core block set and the second core block set are achieved.

Description

Technical Field

[0001] This invention belongs to the field of die casting mold technology, specifically relating to a high-pressure extrusion casting mold for flywheel housings of new energy vehicles. Background Technology

[0002] As a core load-bearing component of the power system, the flywheel housing of new energy vehicles directly affects the power transmission efficiency and operational stability of the entire vehicle due to its structural integrity, dimensional accuracy, and mechanical properties. Therefore, it places extremely high demands on the design and manufacturing of casting molds. High-pressure extrusion casting, with its advantages of high forming efficiency, high casting density, and excellent mechanical properties, has become the mainstream process for the mass production of flywheel housings in new energy vehicles. The high-pressure extrusion casting mold, which is used in conjunction with this process, is a key piece of equipment for ensuring the quality of the castings.

[0003] The internal structure of the flywheel housing in new energy vehicles is complex. To meet the assembly requirements of the power system, its cavity typically has multiple protrusions, grooves, or holes that are inverted relative to the ejection direction of the mold. These inverted structures are essential for the precise assembly of the flywheel housing with other components, but they also pose a significant challenge to the mold demolding process. During high-pressure extrusion casting, molten metal fills the mold cavity under high pressure and cools to form the final flywheel housing, which tightly wraps around the mold core. The presence of these inverted structures creates demolding interference. If the demolding method is not appropriate, it can easily lead to defects such as tearing, deformation, and cracking in the casting, and even damage to the mold, severely impacting production efficiency and product qualification rate.

[0004] Currently, existing technologies for molds with inverted core structures that are offset from the ejection direction employ a relatively simple demolding method, generally using a "partial core movement + overall ejection" approach. Specifically, after mold opening, to eliminate the interference from the inverted structure, only a portion of the core components is typically moved along a preset direction. By reducing the overall size of the core, the obstruction of demolding by the inverted structure is eliminated. Then, the ejection mechanism is activated to eject the product from the mold cavity. During this process, to ensure the stability of the core structure and the product molding accuracy, the remaining core portion remains stationary inside the workpiece until the product is completely ejected. Afterward, the remaining core is separated from the workpiece manually or by additional auxiliary mechanisms.

[0005] While this traditional method can solve the demolding problem of undercut cores to some extent, it has many inherent drawbacks. On the one hand, the core retained inside the workpiece will form a tight fit with the inner wall of the formed flywheel housing, which easily generates large friction during the ejection process. This not only increases the load on the ejection mechanism, leading to insufficient ejection power and ejection jamming, but also easily causes scratches and damage to the inner wall of the flywheel housing, affecting the surface quality and dimensional accuracy of the product. On the other hand, an additional separation process between the core and the workpiece is required after the product is ejected. This not only prolongs the production cycle and reduces production efficiency, but also increases labor costs. Furthermore, improper operation during manual separation can easily damage the workpiece or core, further increasing production costs.

[0006] Furthermore, the requirements for structural strength and dimensional accuracy of flywheel housings in new energy vehicles are constantly increasing, and the number and shape of their internal undercut structures are becoming increasingly complex. The traditional demolding method of "partial core movement and partial core retention" is no longer suitable for the demolding needs of complex undercut structures. It cannot effectively guarantee the synchronization and accuracy of core movement, and is prone to problems such as core jamming and movement deviation. This leads to defects such as chipping and deformation of the undercut parts in the casting, which cannot meet the high-quality production requirements of new energy vehicle flywheel housings. At the same time, the retained core is in a state of being wrapped in high-temperature casting for a long time, which is prone to thermal fatigue damage, shortens the core's service life, and increases mold maintenance costs.

[0007] In summary, the existing methods for processing the undercut core inside the high-pressure extrusion casting mold for new energy vehicle flywheel housings suffer from problems such as low demolding efficiency, unstable product quality, high production costs, and difficult mold maintenance. These methods are difficult to adapt to the large-scale, high-quality production requirements of new energy vehicle flywheel housings. Therefore, there is an urgent need for a high-pressure extrusion casting mold structure that can solve the above-mentioned technical pain points. Summary of the Invention

[0008] The technical problem to be solved by the present invention is to provide a high-pressure extrusion casting mold for flywheel housings of new energy vehicles, in view of the current state of the prior art.

[0009] The technical solution adopted by this invention to solve the above-mentioned technical problems is as follows: A high-pressure extrusion casting mold for flywheel housings of new energy vehicles is proposed, comprising: a fixed mold assembly, a moving mold assembly, an ejection mechanism, and a core mechanism. The fixed mold assembly and the moving mold assembly are movably pressed together, forming a product cavity when they are pressed together. The ejection mechanism includes an ejector pin, a push plate, and a pull rod. The core mechanism includes a first core block group and a second core block group that are driven independently of each other; The first core block group includes at least two oppositely arranged first core blocks, each of which is movably disposed on the moving mold assembly; The second core block group includes at least two opposing second core blocks, each of which is movably mounted on the moving mold assembly; The core mechanism also includes an internal core block and a linkage mechanism; The internal core block is connected to the pull rod and is driven to each of the first core blocks. When the pull rod moves, it drives each of the first core blocks to move closer to or further away from each other along a first direction. The linkage mechanism includes connecting rods corresponding to each of the second core blocks. One end of each connecting rod is rotatably connected to the end of the second core block facing away from the fixed mold assembly, and the other end is rotatably connected to the ejector plate. When the pull rod is activated, it drives the first core blocks to move closer or further apart from each other via the internal core blocks. When the ejector plate moves, it drives the second core blocks to move closer or further apart through the connecting rod.

[0010] In the aforementioned high-pressure extrusion casting mold for a flywheel housing of a new energy vehicle, after the mold is opened, the pull rod moves first and the ejector plate moves later. Before the mold closes, the ejector plate moves first, and the pull rod moves later.

[0011] In the aforementioned high-pressure extrusion casting mold for a flywheel housing of a new energy vehicle, the moving direction of the first core block is perpendicular to the mold opening direction. The moving direction of the second core block is set at an angle to the mold opening direction of the mold.

[0012] In the aforementioned high-pressure extrusion casting mold for flywheel housing of new energy vehicles, a first driving part is inclinedly provided on the outer surface of the inner core block. The number of the first driving parts corresponds to the number of the first core blocks. A first driven part is provided on the side of the first core block facing the inner core block. The first driving part and the first driven part move against each other to drive the first core block to move along a preset guide direction when the inner core block moves.

[0013] In the above-mentioned high-pressure extrusion casting mold for flywheel housing of new energy vehicle, the first driving part is a first protrusion provided on the outer surface of the inner core block, and the first driven part is a first groove provided on the first core block, and the first protrusion and the first groove have the same inclination angle. Alternatively, the first driving part is a first groove provided on the outer surface of the inner core block, and the first driven part is a first protrusion provided on the first core block, with the first groove and the first protrusion having a matching inclination angle.

[0014] In the aforementioned high-pressure extrusion casting mold for flywheel housing of new energy vehicles, the moving mold assembly is detachably connected with guide blocks that correspond one-to-one with the first core block. The guide blocks are provided with guide protrusions at intervals, and the end of the first core block facing the moving mold assembly is provided with a guide recess. The guide recess and the guide protrusion are adapted to provide precise guidance when the first core block moves.

[0015] In the aforementioned high-pressure extrusion casting mold for a flywheel housing of a new energy vehicle, a hydraulic cylinder is provided on the moving mold assembly, and a locking block is fixedly connected to the output end of the hydraulic cylinder. The locking block is movably disposed between the first core block and the guide block to provide a limit for the first core block along the mold opening direction when the mold is closed.

[0016] In the aforementioned high-pressure extrusion casting mold for a flywheel housing of a new energy vehicle, the moving mold assembly includes a moving mold frame. A second driving part is inclinedly arranged on the moving mold frame. The number of the second driving parts is equal to and corresponds one-to-one with the number of the second core blocks. A second driven part adapted to the second driving part is inclinedly arranged on the second core block. The second driving part and the second driven part move against each other to guide and push each of the second core blocks to move closer or further apart when the second core blocks move.

[0017] In the above-mentioned high-pressure extrusion casting mold for flywheel housing of new energy vehicle, the second driving part is a second protrusion provided on the moving mold frame, and the second driven part is a second groove provided on the second core block, and the inclined surface of the second protrusion and the second groove are in contact; Alternatively, the second driving part is a groove provided on the moving mold frame, and the second driven part is a protrusion provided on the second core block, with the groove and the protrusion having the same inclination angle.

[0018] In the aforementioned high-pressure extrusion casting mold for a flywheel housing of a new energy vehicle, a guide post is provided on the moving mold assembly, and a guide sleeve is provided on the ejector plate. The inner wall of the guide sleeve movably abuts against the outer wall of the guide post to provide guidance when the ejector plate moves.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] (1) By setting up a first core block group and a second core block group that drive independently, and combining them with an internal core block and a linkage mechanism, the internal core block is connected to the pull rod and is connected to each first core block in a transmission connection. The linkage mechanism is connected to the ejector plate and each second core block, realizing independent driving and synchronous linkage of the first core block group and the second core block group. When the pull rod moves, it can drive each first core block to move closer or further away from each other in the first direction. When the ejector plate moves, it can drive each second core block to move closer or further away from each other. This completely avoids the problem of some cores remaining in the workpiece in the prior art, effectively reduces the friction between the workpiece and the core during demolding, and prevents defects such as tearing and deformation of the workpiece. At the same time, there is no need to add an extra separation process between the core and the workpiece, which improves the demolding efficiency and product molding quality, and ensures the coordination and stability of the actions of each component of the mold.

[0021] (2) By limiting the sequence of action of the pull rod and the ejector plate after the mold opens, and the sequence of action of the ejector plate and the pull rod before the mold closes, the opening and closing and resetting of each core block are precisely coordinated with the mold opening and closing actions, avoiding interference between the core block action and the mold opening and closing action, ensuring that each core block is accurately reset to the forming position when the mold closes, ensuring the product size accuracy, and that each core block releases the undercut interference in an orderly manner when the mold opens, ensuring that the demolding process is stable and controllable, further reducing the risk of workpiece damage and mold jamming.

[0022] (3) By limiting the movement direction of the first core block to be perpendicular to the mold opening direction and the movement direction of the second core block to be at an angle to the mold opening direction, the first core block and the second core block can be adapted to the undercut structure of different positions and orientations of the flywheel housing, accurately eliminate various undercut interferences, and effectively avoid motion interference between the two core block groups, ensuring the smoothness of the core mechanism's movement, adapting to the complex internal undercut structure design of the new energy vehicle flywheel housing, and improving the mold's adaptability to flywheel housings with different structures. Attached Figure Description

[0023] Figure 1 This is a perspective view of a high-pressure extrusion casting mold for a flywheel housing of a new energy vehicle according to the present invention.

[0024] Figure 2 yes Figure 1 A 3D view omitting the fixed mold components.

[0025] Figure 3 yes Figure 2 A 3D view omitting the moving model frame and some structural elements.

[0026] Figure 4 yes Figure 3 A magnified view of a portion of point A in the middle.

[0027] Figure 5 It is a 3D view of the moving mold frame.

[0028] Figure 6 It is a three-dimensional view of the first core block assembly, the internal core, and the guide block when they are connected.

[0029] Figure 7 yes Figure 6 The three-dimensional view omitting the guide block and part of the first core block.

[0030] In the figure, 100 is the fixed mold assembly; 200 is the moving mold assembly; 210 is the guide block; 211 is the guide protrusion; 220 is the hydraulic cylinder; 230 is the locking block; 240 is the moving mold frame; 241 is the second drive unit; 250 is the guide post; 300 is the ejection mechanism; 310 is the ejector plate; 311 is the guide sleeve; 320 is the tie rod; 400 is the core mechanism; 410 is the first core block group; 411 is the first driven part; 412 is the guide recess; 420 is the second core block group; 430 is the internal core block; 431 is the first drive unit; 440 is the connecting rod; and 450 is the second driven part. Detailed Implementation

[0031] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0032] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0033] This embodiment discloses a high-pressure extrusion casting mold for flywheel housings of new energy vehicles, aiming to solve the problems of poor product quality, low production efficiency, and high mold maintenance costs caused by "partial core movement and partial core retention" during demolding of undercut cores in the prior art. Its specific structure is as follows: like Figures 1 to 7 As shown, this mold mainly includes a fixed mold assembly 100, a moving mold assembly 200, an ejection mechanism 300, and a core mechanism 400. These components work together to achieve high-pressure extrusion casting and efficient demolding of the flywheel housing for new energy vehicles. The specific structure is as follows: The fixed mold assembly 100 is fixedly installed at the fixed end of the high-pressure extrusion casting equipment, and the moving mold assembly 200 is movably installed at the moving end of the equipment. The two can move and abut against each other along the preset mold opening direction of the equipment.

[0034] When the fixed mold assembly 100 and the moving mold assembly 200 are fully pressed together, their cavity surfaces enclose each other to form a product cavity that is consistent with the shape of the flywheel shell of a new energy vehicle, which is used to contain molten metal and achieve molding.

[0035] The ejection mechanism 300 includes an ejector plate 310 and a pull rod 320. It should be noted that the movement of the ejector plate 310 and the pull rod 320 is accomplished by a power mechanism on the high-pressure extrusion casting equipment (such as a hydraulic cylinder 220 or a servo motor). The power mechanism is connected to the ejector plate 310 and the pull rod 320 respectively, which can precisely control their movement speed, stroke and action sequence, ensuring a smooth and controllable demolding process.

[0036] The core mechanism 400 is the core component for demolding the undercut core. It includes a first core block group 410 and a second core block group 420 that are driven independently, as well as an internal core block 430 and a linkage mechanism. The specific configuration of each component is as follows: The first core block group 410 includes two oppositely arranged first core blocks (which can be adjusted according to the number of flywheel housing undercut structures, at least two). Each first core block is movably arranged on the moving mold assembly 200, and its moving direction is limited by the guide structure on the moving mold assembly 200, for forming a certain set of undercut structures inside the flywheel housing.

[0037] The second type of core block group 420 includes two oppositely arranged second type of core blocks (which can be adjusted according to the number of flywheel housing undercut structures, at least two). Each second type of core block is movably arranged on the moving mold assembly 200, and its moving direction is different from that of the first type of core block. It is used to form another set of undercut structures inside the flywheel housing.

[0038] The internal core block 430 is fixedly connected to the pull rod 320 and is connected to each of the first core blocks in a transmission manner. When the power mechanism of the equipment drives the pull rod 320 to move in a preset direction, the pull rod 320 will drive the internal core block 430 to move synchronously, thereby driving each of the first core blocks to move closer or further away from each other in the first direction, so as to realize the opening and closing action of the first core block.

[0039] The linkage mechanism includes a linkage 440 corresponding to each of the second core blocks. One end of the linkage 440 is rotatably connected to the end of the second core block away from the fixed mold assembly 100 via a rotating shaft, and the other end is also rotatably connected to the ejector plate 310 via a rotating shaft.

[0040] When the power mechanism of the equipment drives the ejector plate 310 to move along the mold opening direction, the ejector plate 310 will drive each second core block to move synchronously through the connecting rod 440, so as to realize the opening and closing action of the second core block.

[0041] During the mold opening and closing process, the sequence of movement of the tie rod 320 and the ejector plate 310 is precisely controlled by the equipment's control system, as follows: After the mold completes the mold opening action (the fixed mold assembly 100 and the moving mold assembly 200 separate), the power mechanism of the equipment first drives the pull rod 320 to move, and through the internal core block 430, drives each first core block to move away from each other, thereby releasing the undercut interference corresponding to the first core block.

[0042] Subsequently, the power mechanism drives the ejector plate 310 to move, simultaneously causing the second core blocks to move away from each other, releasing the inverted interference corresponding to the second core block, and at the same time ejecting the formed flywheel housing.

[0043] When the mold is ready to close, the power mechanism of the equipment first drives the ejector plate 310 to move in the opposite direction, causing the second core blocks to move closer to each other and reset.

[0044] Subsequently, the power mechanism drives the pull rod 320 to move in the opposite direction, causing the internal core block 430 and the first core block to move closer to each other and reset. After ensuring that each core block is reset to the molding position, the fixed mold assembly 100 and the moving mold assembly 200 begin to close the mold, ensuring the mold closing accuracy.

[0045] The first type of core block moves in a direction perpendicular to the mold opening direction. That is, the first type of core block moves closer to or further away from each other in the horizontal direction (assuming the mold opening direction is vertical). This adapts to the undercut structure on the flywheel housing sidewall, ensuring that the undercut interference can be accurately released during movement without affecting the operation of other components.

[0046] The moving direction of the second core block is set at an angle to the mold opening direction (preferably 30°-60°), which is compatible with the inverted buckle structure set at an inclination inside the flywheel housing. By moving at an inclination, the inverted buckle interference can be effectively eliminated, and the motion interference with the first core block and the internal core block 430 can be avoided, thus ensuring the coordination of the core mechanism 400's movement.

[0047] The outer surface of the inner core block 430 is inclinedly provided with a first driving part 431. The number of first driving parts 431 corresponds one-to-one with the number of first core blocks. Each first core block has a first driven part 411 adapted to the first driving part 431 on its side facing the inner core block 430. The first driving part 431 and the first driven part 411 move against each other to form an inclined surface transmission structure. The specific implementation is one of the following two (which can be selected according to actual production needs): The first driving part 431 is a first protrusion integrally formed on the outer surface of the inner core block 430. The surface of the first protrusion is inclined. The first driven part 411 is a first groove formed on the first core block. The inclination angle of the first groove is exactly the same as the inclination angle of the first protrusion, and the size of the first protrusion matches the size of the first groove. When the inner core block 430 moves with the pull rod 320, the first protrusion slides in the first groove, and the inclined surface guides the first core block to move in a preset direction.

[0048] The first driving part 431 is a first groove formed on the outer surface of the inner core block 430. The first groove is inclined. The first driven part 411 is a first protrusion integrally formed on the first core block. The inclination angle of the first protrusion matches the inclination angle of the first groove. The first protrusion can be embedded in the first groove and slide along the inclined surface of the groove to realize the driving of the inner core block 430 on the first core block.

[0049] The moving mold assembly 200 is detachably connected to guide blocks 210 corresponding to the first core blocks by bolts. Guide protrusions 211 (the guide protrusions 211 are elongated and parallel to the moving direction of the first core blocks) are provided on the guide blocks 210 along the moving direction of the first core blocks. A guide recess 412 is provided at one end of the first core block facing the moving mold assembly 200. The shape and size of the guide recess 412 are adapted to the guide protrusions 211, and the guide protrusions 211 are embedded in the guide recess 412.

[0050] When the first type of core block moves, the guide protrusion 211 and the guide recess 412 cooperate with each other to provide precise guidance for the first type of core block, avoid deviation or jamming when the first type of core block moves, and ensure the moving accuracy.

[0051] A hydraulic cylinder 220 (part of the equipment power mechanism) is fixedly installed on the moving mold assembly 200. A locking block 230 is fixedly connected to the output end of the hydraulic cylinder 220. The locking block 230 is movably disposed between the first core block and the guide block 210 along a moving direction parallel to the first core block.

[0052] After the mold is closed, the hydraulic cylinder 220 drives the locking block 230 to move and press against the bottom of the first core block and the top of the guide block 210, providing a limit for the first core block along the mold opening direction, preventing the first core block from moving along the mold opening direction due to the pressure of the molten metal during the high-pressure extrusion casting process, thus ensuring molding accuracy.

[0053] The moving mold assembly 200 includes a moving mold frame 240. A second driving part 241 is inclinedly disposed on the moving mold frame 240. The number of second driving parts 241 is equal to and corresponds one-to-one with the number of second core blocks. A second driven part 450, adapted to the second driving part 241, is inclinedly disposed on each of the second core blocks. The second driving parts 241 and the second driven parts 450 move against each other to form an inclined guide structure, used to guide and push each of the second core blocks closer together or further apart. The specific implementation is one of the following two methods: The second drive unit 241 is a second protrusion detachably connected to the moving mold frame 240. The surface of the second protrusion is inclined. The second driven unit 450 is a second groove formed on the second core block. The second protrusion and the inclined surface of the second groove are in close contact. When the second core block moves with the connecting rod 440, the second protrusion slides in the second groove and guides the second core block to move along a preset inclined direction through the inclined guide.

[0054] The second drive part 241 is a groove formed on the moving mold frame 240. The groove is inclined. The second driven part 450 is a protrusion integrally formed on the second core block. The groove and the protrusion have the same inclination angle. The protrusion is embedded in the groove and can slide along the inclined surface of the groove, so as to guide and drive the moving mold frame 240 to the moving direction of the second core block.

[0055] Several guide pillars 250 are fixedly installed on the moving mold assembly 200 (the guide pillars 250 are parallel to the mold opening direction). A guide sleeve 311 is fixedly installed on the ejector plate 310 at the position corresponding to the guide pillars 250. The inner wall of the guide sleeve 311 is smooth and moves against the outer wall of the guide pillars 250.

[0056] When the power mechanism of the equipment drives the ejector plate 310 to move, the guide sleeve 311 slides along the guide post 250 to provide stable guidance for the ejector plate 310, avoid tilting or offset when the ejector plate 310 moves, ensure that the ejector rod and connecting rod 440 move synchronously, and ensure a smooth demolding process.

[0057] During the mold closing stage, the equipment's power mechanism first drives the ejector plate 310 to reverse and reset, causing the second core blocks to move closer to each other and reset.

[0058] Then the drive rod 320 is reversed to reset, causing the internal core block 430 and the first core block to move closer to each other and reset; after each core block is reset, the oil cylinder 220 drives the locking block 230 to move upward and lock the first core block.

[0059] Finally, the moving mold assembly 200 moves toward and presses against the fixed mold assembly 100 to form a complete product cavity, ready for casting.

[0060] During the molding stage, molten metal is injected into the product cavity under high pressure. After cooling and molding, it forms a flywheel housing for new energy vehicles. The molded flywheel housing is tightly wrapped around the first core block, the second core block, and the internal core block 430.

[0061] During the mold opening and demolding stage, the moving mold assembly 200 separates from the fixed mold assembly 100 to complete the mold opening; the equipment power mechanism first drives the oil cylinder 220 to move, thereby moving the locking block 230 and releasing the locking of the first core block.

[0062] Then the drive rod 320 moves, and through the inclined plane transmission between the internal core block 430 and the first core block, it drives each first core block to move away from each other, thus releasing the inverted interference corresponding to the first core block.

[0063] Next, the ejector plate 310 is driven to move. The ejector plate 310 drives each of the second core blocks to move away from each other in the inclined direction through the connecting rod 440, thereby releasing the corresponding undercut interference of the second core blocks.

[0064] The ejector plate 310 moves continuously, completely separating the second core block from the formed flywheel housing, thus completing the demolding. After demolding, all components are reset in reverse order, ready for the next casting.

[0065] This embodiment achieves synchronous demolding of all undercut cores by using independently driven first core block group 410 and second core block group 420, in conjunction with internal core block 430, linkage mechanism and equipment power mechanism. This completely solves the pain point of "partial core retention" in the prior art, ensures product quality, improves production efficiency, reduces mold maintenance costs, and is fully compatible with the large-scale, high-quality production needs of new energy vehicle flywheel housings.

[0066] It should be noted that in this invention, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. The terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two elements or the interaction between two elements, unless otherwise explicitly specified. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0067] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0068] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A high-pressure extrusion casting mold for flywheel housings in new energy vehicles, comprising: The system comprises a fixed mold assembly, a moving mold assembly, an ejector mechanism, and a core mechanism. The fixed mold assembly and the moving mold assembly are movably pressed together, forming a product cavity when they are pressed together. The ejector mechanism includes an ejector pin, a push plate, and a pull rod. The core mechanism includes a first core block group and a second core block group that are driven independently of each other; The first core block group includes at least two oppositely arranged first core blocks, each of which is movably disposed on the moving mold assembly; The second core block group includes at least two opposing second core blocks, each of which is movably mounted on the moving mold assembly; The core mechanism also includes an internal core block and a linkage mechanism; The internal core block is connected to the pull rod and is driven to each of the first core blocks. When the pull rod moves, it drives each of the first core blocks to move closer to or further away from each other along a first direction. The linkage mechanism includes connecting rods corresponding to each of the second core blocks. One end of each connecting rod is rotatably connected to the end of the second core block facing away from the fixed mold assembly, and the other end is rotatably connected to the ejector plate. When the pull rod is activated, it drives the first core blocks to move closer or further apart from each other via the internal core blocks. When the ejector plate moves, it drives the second core blocks to move closer or further apart through the connecting rod.

2. The high-pressure extrusion casting mold for a flywheel housing of a new energy vehicle as described in claim 1, characterized in that, When the mold is opened, the pull rod moves first and the ejector plate moves later; Before the mold closes, the ejector plate moves first, and the pull rod moves later.

3. The high-pressure extrusion casting mold for a flywheel housing of a new energy vehicle as described in claim 1, characterized in that, The direction of movement of the first core block is perpendicular to the mold opening direction; The moving direction of the second core block is set at an angle to the mold opening direction of the mold.

4. The high-pressure extrusion casting mold for a flywheel housing of a new energy vehicle as described in claim 1, characterized in that, The outer surface of the inner core block is provided with a first driving part at an angle, the number of the first driving parts corresponding to the number of the first core blocks, and a first driven part is provided on the side of the first core block facing the inner core block. The first driving part and the first driven part move against each other to drive the first core block to move along a preset guide direction when the inner core block moves.

5. A high-pressure extrusion casting mold for a flywheel housing of a new energy vehicle as described in claim 4, characterized in that, The first driving part is a first protrusion disposed on the outer surface of the inner core block, and the first driven part is a first groove disposed on the first core block, wherein the first protrusion and the first groove have the same inclination angle. Alternatively, the first driving part is a first groove provided on the outer surface of the inner core block, and the first driven part is a first protrusion provided on the first core block, with the first groove and the first protrusion having a matching inclination angle.

6. The high-pressure extrusion casting mold for a flywheel housing of a new energy vehicle as described in claim 1, characterized in that, The moving mold assembly is detachably connected to guide blocks that correspond one-to-one with the first core block. The guide blocks are provided with guide protrusions at intervals. The end of the first core block facing the moving mold assembly is provided with a guide recess. The guide recess is adapted to the guide protrusion to provide precise guidance when the first core block moves.

7. The high-pressure extrusion casting mold for a flywheel housing of a new energy vehicle as described in claim 6, characterized in that, The moving mold assembly is equipped with a hydraulic cylinder, and a locking block is fixedly connected to the output end of the hydraulic cylinder. The locking block is movably disposed between the first core block and the guide block to provide a limit for the first core block along the mold opening direction when the mold is closed.

8. The high-pressure extrusion casting mold for a flywheel housing of a new energy vehicle as described in claim 1, characterized in that, The moving mold assembly includes a moving mold frame, on which a second driving part is inclinedly disposed. The number of the second driving parts is equal to and corresponds one-to-one with the number of the second core blocks. A second driven part adapted to the second driving part is inclinedly disposed on the second core block. The second driving part and the second driven part move against each other to guide and push each of the second core blocks to move closer or further apart when the second core blocks move.

9. A high-pressure extrusion casting mold for a flywheel housing of a new energy vehicle as described in claim 8, characterized in that, The second driving part is a second protrusion provided on the moving mold frame, and the second driven part is a second groove provided on the second core block. The second protrusion and the inclined surface of the second groove are in contact. Alternatively, the second driving part is a groove provided on the moving mold frame, and the second driven part is a protrusion provided on the second core block, with the groove and the protrusion having the same inclination angle.

10. A high-pressure extrusion casting mold for a flywheel housing of a new energy vehicle as described in claim 1, characterized in that, The moving mold assembly is provided with a guide post, and the ejector plate is provided with a guide sleeve. The inner wall of the guide sleeve is movably abutted against the outer wall of the guide post to provide guidance when the ejector plate moves.

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