Aluminum alloy structural part die-casting die with replaceable core

Abstract

The application belongs to the technical field of die-casting moulds, and discloses an automobile aluminum alloy structural part die-casting mould convenient for replacing a mould core, which comprises a mould plate, a plurality of pressing block assemblies, a guide unit and a locking assembly, and a first groove body is formed in the mould plate, the mould core is provided with a contraction guide structure, and the contraction guide structure is matched with the mounting groove, so that the mould core can be gradually guided during insertion or extraction, and the risk of jamming caused by size change during high-temperature die-casting is reduced; meanwhile, the guide unit composed of a first contact part and a second contact part is arranged, so that the mould core can automatically avoid, reset and lock by using its own movement to drive the pressing block during installation and disassembly, and manual adjustment of the position of the pressing structure is not needed; in addition, the locking assembly simultaneously acts on the plurality of pressing blocks, so that the mould core can be subjected to uniform locking force in the circumferential direction after installation, and the positioning stability of the mould core during high-pressure casting is improved.

Description

Technical Field

[0001] This invention relates to the field of die-casting mold technology, and in particular to a die-casting mold for automotive aluminum alloy structural parts that facilitates mold core replacement. Background Technology

[0002] With the development of automotive lightweighting, aerospace equipment, and high-speed railway equipment manufacturing technologies, aluminum alloy structural components, due to their light weight, high strength, and good formability, are widely used in the manufacturing of automotive body structural components, rail transit load-bearing components, and complex structural components for aerospace. Die casting has become an important processing method in the manufacturing of these aluminum alloy structural components. In the die casting production of aluminum alloy structural components, it is usually necessary to set a corresponding cavity structure according to the product shape. In the existing technology, in order to improve the versatility of the mold, the mold core or mold kernel is usually set inside the mold template. The cavity part that determines the product shape is modularly designed, so that the mold core can be replaced or maintained according to different product requirements.

[0003] Specifically, in existing die-casting molds, the mold core is usually installed in a pre-set mounting groove inside the template and fixed by bolts, wedges, or circumferential clamping structures. These structures can ensure the stability of the mold core during the high-pressure casting process to a certain extent. However, since aluminum alloy structural parts used in the automotive, aerospace, and rail transportation industries usually have large dimensions and high forming precision requirements, the mold core needs to withstand the scouring of high-temperature molten aluminum and repeated thermal cycling for a long time. This causes the mold core and template to easily change in size due to thermal stress, which alters the original fit between the mold core and the mounting groove. When the mold is maintained, the product model is changed, or the worn mold core is replaced, the mold core is prone to greater fitting resistance during insertion or removal, and may even jam, thus increasing the difficulty of mold core disassembly and replacement.

[0004] Furthermore, the clamping components in existing mold core fixing structures are usually set as independent fixing parts. Their main function is to limit the mold core after it is installed. However, during the installation or disassembly of the mold core, the clamping components cannot automatically adjust their position according to the movement of the mold core. When the mold core needs to be replaced, it is usually necessary to manually remove multiple fixing components or pre-adjust the position of the clamping components to avoid the clamping components obstructing the movement of the mold core. For die-casting molds of large automotive structural parts and complex aluminum alloy structural parts for aerospace and high-speed rail, the above disassembly and assembly methods not only involve many operation steps, but also easily affect the positioning accuracy of the mold core due to uneven force on multiple fixing positions, thus reducing the mold maintenance efficiency.

[0005] Therefore, there is an urgent need for a mold structure suitable for die casting production of aluminum alloy structural parts. This structure should not only ensure reliable positioning of the mold core under high temperature and high pressure cyclic working conditions, but also reduce the risk of jamming during the insertion and removal of the mold core. Furthermore, by utilizing the mold core's own installation and disassembly actions, the circumferential fixed structure can automatically avoid and reset, achieving rapid positioning and locking of the mold core. This would improve the maintenance convenience and reliability of die casting molds for aluminum alloy structural parts. Summary of the Invention

[0006] The present invention aims to provide a die-casting mold for automotive aluminum alloy structural parts that facilitates core replacement, in order to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: A die-casting mold for automotive aluminum alloy structural parts, facilitating core replacement, includes a template, multiple clamping block assemblies, a guide unit, and a locking assembly. The template has a first groove, within which a core is detachably mounted. Multiple clamping block assemblies are arranged circumferentially along the first groove. Each clamping block assembly includes a third groove on the template, a clamping block slidably disposed within the third groove, and a reset assembly for driving the clamping block to reset. The guide unit comprises a first contact portion disposed around the core and second contact portions respectively disposed on the multiple clamping blocks. It cooperates with the multiple clamping blocks during the insertion or removal of the core along the first groove, driving the multiple clamping blocks to switch between a locking position close to the core and a yielding position away from the core. The locking assembly is connected to the multiple clamping block assemblies and applies a continuous force towards the core to the multiple clamping blocks after they have moved to the locking position, maintaining them in a locked state of contact with the core.

[0008] Preferably, the first contact portion includes a plurality of first inclined surfaces disposed around the periphery of the mold core. The plurality of first inclined surfaces together constitute the periphery of the mold core and are inclined in a manner that gradually tapers toward the center of the mold core in the direction of the first groove. The shape of the inner cavity of the first groove matches the mold core.

[0009] Preferably, all of the third grooves are connected to the first groove, and the clamping block is slidably connected to the inner wall of the first groove, restricting the clamping block to having only the degree of freedom to move back and forth along the extension direction of the third groove.

[0010] Preferably, the reset assembly includes multiple columns and multiple elastic elements, which are installed between the clamping block and the inner wall of the third groove. One end of each column is fixedly connected to the clamping block, and the other end is slidably connected to the inner wall of the third groove. Each column is provided with a corresponding elastic element.

[0011] Preferably, the second contact portion is disposed at one end of the clamping block near the first groove. The second contact portion includes a third inclined surface disposed near the first groove and a fourth inclined surface disposed away from the first groove, with the first inclined surface and the fourth inclined surface transitioning naturally.

[0012] Preferably, the first inclined surface and the third inclined surface are configured to cooperate. When the mold core is inserted along the first groove, the first inclined surface and the third inclined surface come into contact and generate relative displacement, causing the clamping block to move away from the first groove.

[0013] Preferably, the first contact portion further includes a fourth groove formed on each first inclined surface. The multiple fourth grooves are matched in shape with the multiple clamping blocks and are positioned in a one-to-one correspondence. When the mold core is fully inserted into the first groove, each clamping block can at least partially enter the corresponding fourth groove.

[0014] Preferably, the inner wall of the fourth groove away from the first groove forms a second inclined surface, the first inclined surface and the second inclined surface transition naturally, and the fourth inclined surface and the second inclined surface are configured to cooperate. When the mold core is pulled out along the first groove, the fourth inclined surface and the second inclined surface come into contact and generate relative displacement, causing the clamping block to move away from the first groove.

[0015] Preferably, the locking assembly includes a plurality of hydraulic rods embedded inside the template. The plurality of hydraulic rods are the same in number and position as the plurality of third grooves. The output end of the hydraulic rod extends into the corresponding third groove and is fixedly connected to the clamping block therein. The output end of the hydraulic rod and the corresponding clamping block have the same free direction of movement.

[0016] Preferably, the locking assembly further includes a pipe embedded in the template, the pipe being connected to the oil chambers of multiple hydraulic rods and forming a ring-shaped interconnected structure, the pipe being fixedly connected to an interface communicating with the inner cavity, and the input end of the interface extending to the outside of the template.

[0017] The beneficial effects of this technical solution compared to existing technologies are as follows: This invention, by configuring the mold core with a shrinkage guide structure and matching it with the mounting groove, enables the mold core to form a progressive guide during insertion or removal, reducing the risk of jamming caused by dimensional changes during high-temperature die casting. Simultaneously, by setting a guide unit composed of a first contact part and a second contact part, the mold core can automatically avoid, reset, and lock the clamping blocks during installation and disassembly using its own movement, eliminating the need for manual adjustment of the clamping structure position. Furthermore, by having the locking component act synchronously on multiple clamping blocks, the mold core receives a uniform circumferential locking force after installation, improving the positioning stability of the mold core during the high-pressure die casting cycle. Attached Figure Description

[0018] Figure 1 This is a first overall schematic diagram of the present invention; Figure 2 This is a second overall schematic diagram of the present invention; Figure 3 This is an exploded view of the present invention; Figure 4 This is a partial schematic diagram of the present invention; Figure 5 This is a first partial cross-sectional view of the present invention; Figure 6 This is a second partial cross-sectional view of the present invention; Figure 7 This is a diagram illustrating the working conditions of the present invention; Figure 8 For the present invention Figure 7 Schematic diagram at point A in the middle.

[0019] Reference numerals: 100, template; 110, first groove; 200, mold core; 300, clamping block assembly; 310, third groove; 320, clamping block; 400, guide unit; 410, first contact part; 411, first inclined surface; 412, fourth groove; 4121, second inclined surface; 420, second contact part; 421, third inclined surface; 422, fourth inclined surface; 330, reset assembly; 331, column; 332, elastic element; 500, locking assembly; 510, hydraulic rod; 520, pipe; 530, interface. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments: like Figure 1-5As shown, a die-casting mold for automotive aluminum alloy structural parts with an easily replaceable mold core includes a template 100, multiple clamping block assemblies 300, a guide unit 400, and a locking assembly 500. The template 100 has a first groove 110, within which a mold core 200 is detachably disposed. Multiple clamping block assemblies 300 are arranged circumferentially along the first groove 110. Each clamping block assembly 300 includes a third groove 310 formed on the template 100, a clamping block 320 slidably disposed within the third groove 310, and a reset assembly 330 for driving the clamping block 320 to reset. The guide unit 400... It consists of a first contact portion 410 disposed around the mold core 200 and second contact portions 420 disposed on a plurality of clamping blocks 320 respectively. It is used to cooperate with the plurality of clamping blocks 320 during the insertion or removal of the mold core 200 along the first groove 110, and drive the plurality of clamping blocks 320 to switch between a locking position close to the mold core 200 and a yielding position away from the mold core 200. The locking assembly 500 is connected to the plurality of clamping block assemblies 300 and is used to apply a continuous force toward the mold core 200 to the plurality of clamping blocks 320 after the plurality of clamping blocks 320 have moved to the locking position, so that they remain in a locked state abutting against the mold core 200.

[0021] In this embodiment, the template 100 serves as the main load-bearing structure of the entire mold. It has a first groove 110 machined inside, which is used to install the mold core 200. The cavity on the mold core 200 is the part that truly determines the shape of the aluminum alloy structural component, therefore it needs to be able to be quickly replaced. In the prior art, most mold cores are rectangular structures, and they occasionally jam when inserted into the mounting groove. This is mostly due to deformation caused by high temperatures. Therefore, some workers, when encountering this situation, will place the mold core in a cold storage to freeze it, utilizing the principle of thermal expansion and contraction to restore its shape. This is the problem mentioned in the background art: "jamming occurs during the disassembly or reassembly of the mold core, increasing the difficulty of disassembly and reassembly."

[0022] To address the aforementioned issues, this invention optimizes the structure of the mold core 200 and the first groove 110 by designing all four sides of the mold core 200 to be inclined, giving the mold core an overall conical structure. During its insertion into the first groove 110, the "smaller" end enters first, thus eliminating the problem of jamming.

[0023] When installing the mold core 200, it is directly inserted into the first groove 110. However, to ensure that it will not be ejected or loosened during the high-pressure casting process, multiple clamping block assemblies 300 are arranged around it. These clamping block assemblies 300 are evenly distributed around the first groove 110, essentially "hugging" the mold core 200 from all sides. In the prior art, both the mold core and the clamping blocks are fixed with screws. The user needs to first fix the mold core with multiple screws, then arrange multiple clamping blocks around the mold core, and then fix multiple clamping blocks with multiple screws. This causes the problem of "many operation steps and low disassembly and assembly efficiency" mentioned in the background art.

[0024] To address the aforementioned problems, this invention improves upon the existing detachable clamping block by replacing it with a clamping block 320 that is slidably connected within the third groove 310. This eliminates the need for screw-mounted clamping blocks. Furthermore, a guide unit 400 is provided between the mold core 200 and the multiple clamping blocks 320. Its function is as follows: when the mold core 200 is inserted into the first groove 110, it will first contact the multiple clamping blocks 320. Under the guidance of the guide unit 400, the multiple clamping blocks 320 will automatically avoid contact. The mold core 200 is allowed to smoothly enter the first groove 110 by moving into the "yielding position". After the mold core 200 is fully inside the first groove 110, the multiple clamping blocks 320 are "locked" by the reset component 330, thus achieving initial fixation of the mold core 200. Furthermore, when the mold core 200 is removed from the first groove 110 by the guide unit 400, the clamping blocks 320 will also move aside to allow it to be removed smoothly. Therefore, the clamping blocks 320 themselves do not need to be disassembled with screws, and the clamping blocks 320 simultaneously fix the mold core 200, thus eliminating the need for screw fixation and achieving "screwless" operation.

[0025] In this invention, the reset capability provided by the reset component 330 allows the clamping block 320 to reciprocate under the influence of the mold core 200, that is, to switch between the "yielding position" and the "locking position". However, after the clamping block 320 enters the "locking position", the reset component 330 can only provide a preliminary fixing effect, which can only ensure that the mold core 200 does not fall off under normal conditions. It is far from achieving the effect of not being ejected or loosened during the high-pressure casting process. Therefore, this invention also designs a locking component 500, which preferably adopts a one-button start-stop hydraulic system. It can further pressurize the clamping block 320 in the "locking position" and, with the cooperation of the guide unit 400, force it to squeeze the mold core 200, thereby achieving the final fixing effect. The start and stop of the locking component 500 also becomes the only step after the clamping block and screws are installed and removed.

[0026] like Figure 1As shown, the first contact portion 410 includes a plurality of first inclined surfaces 411 disposed on the periphery of the mold core 200. The plurality of first inclined surfaces 411 together constitute the periphery of the mold core 200 and are inclined in a direction that gradually shrinks toward the center of the mold core 200 in the direction of the first groove 110. The inner cavity shape of the first groove 110 matches the mold core 200.

[0027] In this embodiment, the multiple first inclined surfaces 411 arranged around the mold core 200 form an overall contractile shape, enabling the mold core 200 to form a guiding geometric transition structure when inserted into the first groove 110. Simultaneously, this structure allows the mold core 200 to gradually contact the clamping block 320 during insertion into the first groove 110, preventing localized jamming.

[0028] Furthermore, the inner cavity of the first groove 110 and the mold core 200 adopt a matching structure, that is, the inner wall of the first groove 110 can fit with most of the outer wall of the mold core 200. This setting enables the mold core 200 to achieve overall fitting and positioning during final positioning, thereby further improving the overall stability of the mold.

[0029] like Figure 3 and Figure 5 As shown, multiple third grooves 310 are connected to the first groove 110, and the clamping block 320 is slidably connected to the inner wall of the first groove 110, restricting the clamping block 320 to only have the degree of freedom to move back and forth along the extension direction of the third groove 310.

[0030] In this embodiment, the movement trajectory of the clamping block 320 is restricted by the structure of the third groove 310, and it can only move forward and backward along the extension direction of the third groove 310, thereby preventing the clamping block 320 from deflecting or getting stuck.

[0031] like Figure 3 and Figure 5 As shown, the reset assembly 330 includes multiple pillars 331 and multiple elastic elements 332, which are installed between the clamping block 320 and the inner wall of the third groove 310. One end of the pillar 331 is fixedly connected to the clamping block 320, and the other end is slidably connected to the inner wall of the third groove 310. Each pillar 331 is provided with a corresponding elastic element 332.

[0032] In this embodiment, the elastic element 332 is preferably a spring, which is sleeved around the column 331. When the clamping block 320 is squeezed by an external force, it undergoes elastic deformation and stores elastic potential energy, thereby pushing the clamping block 320 to automatically reset after the external force is released. The column 331 is used to guide and support the elastic element 332, so that it maintains structural stability during the deformation process.

[0033] Furthermore, the combination of the column 331 and the elastic element 332 enables the clamping block 320 to complete the reset action without external intervention, thereby improving the reliability of the mold for repeated use.

[0034] like Figure 4 , Figure 7 and Figure 8 As shown, the second contact portion 420 is disposed at one end of the clamping block 320 near the first groove 110. The second contact portion 420 includes a third inclined surface 421 disposed near the first groove 110 and a fourth inclined surface 422 disposed away from the first groove 110. The first inclined surface 411 and the fourth inclined surface 422 transition naturally. The first inclined surface 411 and the third inclined surface 421 are fitted together. When the mold core 200 is inserted along the first groove 110, the first inclined surface 411 and the third inclined surface 421 contact each other and generate relative displacement, causing the clamping block 320 to move away from the first groove 110. The first contact portion 410 also includes a fourth groove 41 formed on each of the first inclined surfaces 411. 2. Multiple fourth grooves 412 are matched in shape and position with multiple clamping blocks 320. When the mold core 200 is fully inserted into the first groove 110, each clamping block 320 can at least partially enter the corresponding fourth groove 412. The inner wall of the fourth groove 412 away from the first groove 110 forms a second inclined surface 4121. The first inclined surface 411 and the second inclined surface 4121 transition naturally. The fourth inclined surface 422 and the second inclined surface 4121 are matched. When the mold core 200 is pulled out along the first groove 110, the fourth inclined surface 422 and the second inclined surface 4121 come into contact and generate relative displacement, causing the clamping block 320 to move away from the first groove 110.

[0035] In this embodiment, the guide unit 400 of the present invention, and in particular how the four inclined structures it encompasses cooperate, are described in detail as follows: (in: Figure 7 The diagram illustrates three states during the movement of the mold core 200: P1: Not yet entered the first groove 110, not in contact with the clamping block 320; P2: Beginning to enter the first groove 110, making initial contact with the clamping block 320; P3: Fully entered the first groove 110, and the clamping block 320 enters the locking position. When the mold core 200 is inserted into the first groove 110, the first inclined surface 411 first contacts the third inclined surface 421. Since both are inclined structures, they form a "slope pushing" effect during relative movement, causing the clamping block 320 to gradually move away from the first groove 110 within the third groove 310, thus making room for the continued insertion of the mold core 200 (see reference). Figure 7 (P2).

[0036] As the mold core 200 continues to penetrate to the predetermined position, the clamping block 320 springs back inward under the action of the reset component 330. At this time, a portion of the clamping block 320 enters the corresponding fourth groove 412 on the periphery of the mold core 200, achieving initial positioning. Simultaneously, the second inclined surface 4121 and the fourth inclined surface 422 form a corresponding fit, creating a stable force transition relationship between the clamping block 320 and the mold core 200 (see reference). Figure 7 (P3 in the text).

[0037] During disassembly, the operator pulls out the mold core 200 in the reverse direction. The fourth inclined surface 422 first contacts the second inclined surface 4121 and slides relative to it. With the cooperation of the inclined surface, the clamping block 320 is pushed outward again and exits the fourth groove 412, thereby releasing the locking state.

[0038] Subsequently, as the mold core 200 continues to retract, the first inclined surface 411 and the third inclined surface 421 engage in reverse engagement again. Through the reverse guiding action of the inclined surfaces, the clamping block 320 completely retracts from the yielding position and returns to the initial position, thus completing the successful disassembly of the mold core 200.

[0039] Through the cooperation of the above four sets of inclined surfaces, the clamping block 320 can achieve a continuous action of "automatic clearance - automatic locking - automatic unlocking" during the insertion and removal of the mold core 200, without the need for additional disassembly of fasteners.

[0040] It is worth noting that when the mold core 200 is fully inserted into the first groove 110, the second inclined surface 4121 and the fourth inclined surface 422 are in contact. At this time, if the locking component 500 applies pressure to the multiple clamping blocks 320, the "slope pushing" effect of the second inclined surface 4121 and the fourth inclined surface 422 not only applies extrusion force from the circumference to the center of the mold core 200, but also causes the mold core 200 to be squeezed deeper into the first groove 110. Thus, it not only fixes the mold core 200, but also promotes it to fit into the first groove 110.

[0041] like Figure 5 and Figure 6 As shown, the locking assembly 500 includes a plurality of hydraulic rods 510 embedded inside the template 100. The plurality of hydraulic rods 510 are the same in number as the plurality of third grooves 310 and their positions correspond one-to-one. The output end of the hydraulic rod 510 extends into the corresponding third groove 310 and is fixedly connected to the clamping block 320 therein. The output end of the hydraulic rod 510 and the corresponding clamping block 320 have the same free direction of movement.

[0042] In this embodiment, the hydraulic rods 510 are embedded inside the template 100 and form a one-to-one driving relationship with the clamping blocks 320. In actual operation, the external hydraulic system can inject pressure medium into the pipes 520 to make multiple hydraulic rods 510 move synchronously, thereby ensuring that multiple clamping blocks 320 can apply locking force synchronously and avoid the mold core 200 from shifting due to uneven force at a single point.

[0043] like Figure 5 and Figure 6 As shown, the locking assembly 500 also includes a pipe 520 embedded in the template 100. The pipe 520 is connected to the oil chambers of multiple hydraulic rods 510 and forms a ring-shaped communication structure. An interface 530 connected to the inner cavity is fixedly connected to the pipe 520. The input end of the interface 530 extends to the outside of the template 100.

[0044] In this embodiment, the pipe 520 is arranged in a ring-shaped interconnected structure inside the template 100, enabling the hydraulic rods 510 to be synchronously driven under the same pressure source. The interface 530 serves as an external pressure input terminal, connecting to an external hydraulic device to input and release the pressure medium, thereby controlling the opening and closing state of the entire locking assembly 500.

[0045] It is worth noting that the external hydraulic system preferably uses a high-pressure oil pipe and a sealed connection with the interface 530 to input the pressure medium into the pipeline 520 through the interface 530, thereby driving each hydraulic rod 510 to extend and retract synchronously. This is a mature existing technology.

[0046] Working principle: In operation, the mold core 200 is axially inserted into the template 100 from one end of the first groove 110. Initially, the first inclined surface 411 in the first contact portion 410 on the outer periphery of the mold core 200 contacts the third inclined surface 421 at the end of the clamping block 320. Since both are inclined surfaces, they form a guiding effect during relative movement, causing the clamping block 320 to move away from the first groove 110 along its sliding direction within the third groove 310 and compress the reset assembly 330. As the mold core 200 continues to be inserted, the clamping block 320 begins to reset under the elastic restoring force of the reset assembly 330, gradually aligning with the fourth groove 412 corresponding to the outer periphery of the mold core 200. At this point, the clamping block 320 partially enters the fourth groove 412, forming an initial locking state. Simultaneously, the second inclined surface 4121 of the fourth groove 412 contacts and matches the fourth inclined surface 422 at the end of the clamping block 320. In the fitted state; when the external hydraulic system provides pressure to the pipe 520 and each hydraulic rod 510 through the interface 530, the hydraulic rods 510 extend synchronously and push the clamping block 320 to move along the third groove 310 toward the mold core 200, so that the second inclined surface 4121 and the fourth inclined surface 422 are squeezed, thereby making the clamping block 320 further tightened circumferentially toward the mold core 200 and kept locked; when the mold core 200 is disassembled, after the external hydraulic system is depressurized, the hydraulic rod 510 retracts, and the mold core 200 is pulled out in the opposite direction along the first groove 110. During the extraction process, the fourth inclined surface 422 first slides in the opposite direction with the second inclined surface 4121, so that the clamping block 320 is separated from the fourth groove 412. Then the first inclined surface 411 and the third inclined surface 421 make reverse guiding contact again, so that the clamping block 320 returns to the initial position along the direction of the third groove 310, and finally completes the in-and-out cycle of the mold core 200.

[0047] The above descriptions are merely embodiments of the present invention, and common knowledge such as specific technical solutions and / or characteristics 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 technical solutions of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention 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 die-casting mold for automotive aluminum alloy structural parts with an easily replaceable mold core, characterized in that, include: A template (100) has a first groove (110) thereon, and a mold core (200) is detachably installed in the first groove (110). Multiple clamping block assemblies (300) are arranged circumferentially along the first groove (110). Each clamping block assembly (300) includes a third groove (310) opened on the template (100), a clamping block (320) slidably disposed in the third groove (310), and a reset assembly (330) for driving the clamping block (320) to reset. The guide unit (400) consists of a first contact portion (410) disposed around the mold core (200) and a second contact portion (420) disposed on a plurality of clamping blocks (320). It is used to cooperate with the plurality of clamping blocks (320) during the insertion or removal of the mold core (200) along the first groove (110) to drive the plurality of clamping blocks (320) to switch between a locking position close to the mold core (200) and a yielding position away from the mold core (200). A locking assembly (500), which is connected to a plurality of clamping block assemblies (300), is used to apply a continuous force toward the mold core (200) after the plurality of clamping blocks (320) have moved to the locking position, so as to keep them in a locked state abutting against the mold core (200).

2. The die-casting mold for automotive aluminum alloy structural parts as described in claim 1, characterized in that: The first contact portion (410) includes a plurality of first inclined surfaces (411) disposed around the mold core (200). The plurality of first inclined surfaces (411) together constitute the periphery of the mold core (200) and are inclined towards the center of the mold core (200) in the direction of the first groove (110). The inner cavity shape of the first groove (110) matches the mold core (200).

3. The die-casting mold for automotive aluminum alloy structural parts as described in claim 1, characterized in that: The multiple third grooves (310) are all connected to the first groove (110), and the clamping block (320) is slidably connected to the inner wall of the first groove (110), restricting the clamping block (320) to only have the degree of freedom to move back and forth along the extension direction of the third groove (310).

4. The die-casting mold for automotive aluminum alloy structural parts as described in claim 1, characterized in that: The reset assembly (330) includes multiple columns (331) and multiple elastic elements (332), which are installed between the clamping block (320) and the inner wall of the third groove (310). One end of the column (331) is fixedly connected to the clamping block (320), and the other end is slidably connected to the inner wall of the third groove (310). Each column (331) is provided with an elastic element (332).

5. A die-casting mold for automotive aluminum alloy structural parts with an easily replaceable mold core as described in claim 2, characterized in that: The second contact portion (420) is disposed at one end of the clamping block (320) near the first groove (110). The second contact portion (420) includes a third inclined surface (421) disposed near the first groove (110) and a fourth inclined surface (422) disposed away from the first groove (110). The first inclined surface (411) and the fourth inclined surface (422) transition naturally.

6. The die-casting mold for automotive aluminum alloy structural parts as described in claim 5, characterized in that: The first inclined surface (411) and the third inclined surface (421) are configured to cooperate. When the mold core (200) is inserted along the first groove (110), the first inclined surface (411) and the third inclined surface (421) come into contact and generate relative displacement, causing the clamping block (320) to move away from the first groove (110).

7. The die-casting mold for automotive aluminum alloy structural parts as described in claim 6, characterized in that: The first contact portion (410) further includes a fourth groove (412) formed on each first inclined surface (411). The multiple fourth grooves (412) are shaped and correspond one-to-one with the multiple clamping blocks (320). When the mold core (200) is fully inserted into the first groove (110), each clamping block (320) can at least partially enter the corresponding fourth groove (412).

8. A die-casting mold for automotive aluminum alloy structural parts with an easily replaceable mold core as described in claim 7, characterized in that: The inner wall of the fourth groove (412) away from the first groove (110) forms a second inclined surface (4121). The first inclined surface (411) and the second inclined surface (4121) transition naturally. The fourth inclined surface (422) and the second inclined surface (4121) are fitted together. When the mold core (200) is pulled out along the first groove (110), the fourth inclined surface (422) and the second inclined surface (4121) come into contact and generate relative displacement, causing the clamping block (320) to move away from the first groove (110).

9. A die-casting mold for automotive aluminum alloy structural parts with an easily replaceable mold core as described in claim 1, characterized in that: The locking assembly (500) includes a plurality of hydraulic rods (510) embedded inside the template (100). The plurality of hydraulic rods (510) are the same number as the plurality of third grooves (310) and their positions correspond one-to-one. The output end of the hydraulic rod (510) extends into the corresponding third groove (310) and is fixedly connected to the clamping block (320) therein. The output end of the hydraulic rod (510) and the corresponding clamping block (320) have the same free direction of movement.

10. A die-casting mold for automotive aluminum alloy structural parts with an easily replaceable mold core as described in claim 9, characterized in that: The locking assembly (500) also includes a pipe (520) embedded in the template (100). The pipe (520) is connected to the oil chambers of a plurality of hydraulic rods (510) and forms an annular connecting structure. An interface (530) connected to the inner cavity is fixedly connected to the pipe (520). The input end of the interface (530) extends to the outside of the template (100).

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