A split cavity structure, a fixed mold assembly and a die-casting mold

Abstract

The utility model relates to die casting die technical field provides a kind of mosaic type cavity structure, fixed mould assembly and die casting die, mosaic type cavity structure includes cavity block main body, cavity insert block, locking member;Cavity block main body is equipped with the mosaic hole of first clamping portion, cavity insert block is embedded in mosaic hole and is equipped with the second clamping portion of cooperation, both enclose and connect space, locking member is equipped in cavity block main body and extends into clamping space and fixes cavity insert block.The utility model adopts clamping cooperation lateral locking structure, is suitable for the narrow limited space of feeding port, can withstand high-pressure alternating impact load, locking firm and not easy to come loose, insert block can be replaced alone, reduce mould downtime maintenance, reduce operation and maintenance cost.

Description

Technical Field

[0001] This utility model belongs to the field of die casting mold technology, specifically relating to an interlocking cavity structure, a fixed mold assembly, and a die casting mold. Background Technology

[0002] Die casting molds, as core process equipment for the mass production of non-ferrous metal die castings, are widely used in the large-scale production of precision components such as automotive parts, home appliance accessories, and communication devices. The fixed mold assembly is a key component in die casting molds for completing the shaping of the casting and the pouring of molten metal. A conventional die casting mold's fixed mold assembly contains a fixed mold cavity block. The inner side of the fixed mold cavity block is machined with a contoured surface that matches the shape of the workpiece to be formed. After the molten metal enters the cavity through the gating system, the contoured surface constrains the flow trajectory of the molten metal. After cooling and solidification, a die casting that meets the dimensional requirements is obtained. Simultaneously, a dedicated feed port is provided on the fixed mold cavity block, through which the molten metal enters the mold cavity, completing the entire filling and die casting process.

[0003] In actual die-casting production, high-pressure, high-speed molten metal ejected from the inlet directly impacts the flow divider cone structure inside the mold. Based on the principle of action and reaction, the flow divider cone simultaneously generates a reverse impact force, which directly acts on the area surrounding the inlet of the fixed mold cavity block. Die-casting production is characterized by high pressure, high speed, and cyclical operation. Each mold closing and filling, and each mold opening and part removal generates an impact reaction force. Under the continuous action of long-term alternating impact loads, the area around the inlet of the fixed mold cavity block is prone to plastic deformation, cavity surface collapse, and dimensional deviations, directly affecting the forming accuracy of the die-cast parts and leading to defects such as burrs, missing material, and dimensional errors. To ensure product quality and mold production accuracy, manufacturers need to periodically stop production to grind, weld, and repair the deformed areas of the fixed mold cavity block's inlet. This not only significantly reduces die-casting production efficiency and increases mold maintenance costs, but repeated repairs also damage the cavity base material, shortening the overall lifespan of the fixed mold cavity block.

[0004] To address the common industry problem of frequent failures and repairs in vulnerable areas of molds, existing die-casting molds generally adopt an insert-type cavity structure. This involves machining vulnerable areas of the cavity into independent cavity inserts, which are then fixedly assembled onto the main cavity block using conventional connection structures such as threaded locking, side pressure plate clamping, and pin positioning locking. When wear or deformation occurs in the vulnerable areas, only the cavity insert needs to be replaced individually, eliminating the need for overall disassembly or repair of the main cavity block. This effectively reduces maintenance costs and shortens mold downtime.

[0005] However, the area around the feed inlet of the mold cavity block is a particularly confined area with limited space and a compact structure. This area contains multiple functional structures such as gating channels, venting channels, and cooling water channels, leaving no extra space for traditional insert locking connectors such as bolts, pressure plates, and locating pins. Directly using a conventional insert fixing structure would not only fail to meet the installation space requirements for insert assembly, but also be unable to withstand the high-intensity alternating impact loads at the feed inlet. During operation, inserts are prone to loosening, displacement, and detachment, and the fixing connection strength is completely insufficient for die-casting conditions. In other words, in this particularly confined and vulnerable area of ​​the mold cavity block feed inlet, conventional insert fixing connection structures on the market are completely ineffective. Currently, there is no reliable insert cavity fixing solution in the industry that is suitable for this confined space and can withstand high-pressure impact loads. It is difficult to achieve rapid replacement and long-term stable use of the vulnerable feed inlet area through insert structures, and the pain points of mold maintenance remain unresolved.

[0006] Therefore, developing a modular cavity structure that can adapt to confined spaces, withstand high-pressure alternating impact loads from die casting, and is easy to assemble and reliably lock has become a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0007] The technical problem to be solved by this utility model is to provide an interlocking cavity structure, a fixed mold assembly, and a die-casting mold, in light of the current state of the technology.

[0008] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a modular cavity structure is proposed, including: a cavity block body, on which a modular hole is provided, and a first snap-fit ​​part is provided on the wall of the modular hole; A cavity insert is fitted into the insert hole. The outer side wall of the cavity insert is provided with a second snap-fit ​​part that cooperates with the first snap-fit ​​part. The first snap-fit ​​part and the second snap-fit ​​part together form a snap-fit ​​space. A locking element is installed on the cavity block body, and one end of the locking element extends into the snap-fit ​​space to fix the cavity insert.

[0009] In the above-mentioned interlocking cavity structure, the first snap-fit ​​portion is a plurality of spaced first snap-fit ​​recesses, and the second snap-fit ​​portion is a plurality of second snap-fit ​​recesses that correspond one-to-one with the first snap-fit ​​recesses.

[0010] In the above-mentioned interlocking cavity structure, the snap-fit ​​space is conical, and the larger end of the snap-fit ​​space is located at the entrance end where the locking member is embedded in the snap-fit ​​space.

[0011] In one of the above-mentioned interlocking cavity structures, the installation direction of the locking member is perpendicular to the installation direction of the cavity insert in the interlocking hole, so that the locking member can be operated from the side of the cavity block body.

[0012] In the above-mentioned interlocking cavity structure, the locking member is a shaft-shaped structure, and the end of the locking member extending into the locking space is tapered and adapted to the locking space, so as to apply radial locking force to the first locking part and the second locking part when the locking member is axially advanced.

[0013] In the above-mentioned interlocking cavity structure, the cavity block body is provided with a mounting hole communicating with the interlocking hole, the wall of the mounting hole is provided with a bolt through hole, and the cavity insert is provided with a first threaded hole corresponding to the bolt through hole. The bolt passes through the bolt through hole and connects with the first threaded hole to provide pre-fixation for the cavity insert.

[0014] This utility model also addresses the above-mentioned technical problems by providing a mold fixing assembly, comprising: Fixed mold frame; The above-mentioned interlocking cavity structure; wherein, The cavity block body is installed on the fixed mold frame. The first end of the locking member passes through the fixed mold frame and the cavity block body in sequence and is embedded in the snap-fit ​​space. The second end of the locking member is located inside the fixed mold frame and is used to provide protection for the locking member.

[0015] In the aforementioned fixed mold assembly, the second end of the locking member is provided with a second threaded hole, which is used to connect with an external tool for removing the locking member.

[0016] In the aforementioned fixed mold assembly, a sealing block is threadedly connected to the outer side wall of the fixed mold frame, and the sealing block abuts against the second end of the locking member.

[0017] This utility model also proposes a die-casting mold to solve the above-mentioned technical problems, including the aforementioned fixed mold assembly.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] (1) By opening a splicing hole with a first snap-fit ​​structure on the main body of the cavity block, and setting a second snap-fit ​​structure that can be adapted to the first snap-fit ​​structure on the cavity insert, the first snap-fit ​​structure and the second snap-fit ​​structure can be surrounded by each other to form a snap-fit ​​limiting space. With the locking part extending into the snap-fit ​​space to lock the cavity insert, the structure solves the problems of the small space in the fixed mold cavity inlet area, which makes it impossible to arrange conventional insert locking connectors, the traditional insert fixing structure is difficult to withstand high pressure alternating impact load, and the insert is easy to loosen and fall off. It can adapt to the limited installation space of the inlet, achieve high-strength locking by snap-fit ​​and locking part limiting, and can be disassembled and replaced separately, greatly reducing the mold downtime and maintenance cost.

[0020] (2) By making the installation direction of the locking part perpendicular to the assembly direction of the cavity insert hole, and by adopting a shaft-shaped structure and setting an adapted conical profile at the end of the locking part that extends into the snap-fit ​​space, the problems of interference with the casting flow channel / cooling water channel / venting groove along the feed axis of the traditional locking structure, the inability of ordinary locking parts to output uniform radial locking force to the snap-fit ​​part, and the easy generation of slight axial movement and wear of the insert under impact load are solved. The locking part can be disassembled and assembled from the side of the cavity block, without occupying the axial space of the feed port, and the conical surface can output continuous and stable radial extrusion force, disperse impact load, and improve the locking reliability and long-term stable operation of the insert.

[0021] (3) By using the fixed mold frame with a built-in cavity block body, one end of the locking part penetrates through the fixed mold frame and the cavity block body and extends into the snap-fit ​​space, and the other end of the locking part is stored inside the fixed mold frame and equipped with a locking end with a second threaded hole and an outer sealing block, the fixed mold assembly structure solves the problems of the locking part being exposed and easily corroded by high temperature flying material, the difficulty in quickly removing the locking part without special tooling, and the locking part being easy to axially retreat and loosen under impact conditions. The fixed mold frame can protect the locking part, the locking part can be quickly disassembled and assembled with the help of the threaded hole and external tools, the sealing block axially limits the locking part to prevent retreat, the locking structure has higher durability, and the mold insert replacement operation is convenient and efficient. Attached Figure Description

[0022] Figure 1 This is a perspective view of a mold assembly according to the present invention.

[0023] Figure 2 yes Figure 1 A 3D view showing the structure with some parts hidden.

[0024] Figure 3 It is a three-dimensional view of the cavity insert.

[0025] Figure 4 This is a three-dimensional view of the main body of the cavity block.

[0026] Figure 5 This is a three-dimensional view of the main body of the cavity block from another direction.

[0027] In the figure, 100 is the main body of the cavity block; 110 is the splicing hole; 120 is the first snap-fit ​​part; 130 is the mounting hole; 140 is the bolt through hole; 200 is the cavity insert; 210 is the second snap-fit ​​part; 220 is the first threaded hole; 300 is the locking part; 310 is the second threaded hole; 400 is the fixed mold frame; and 410 is the sealing block. Detailed Implementation

[0028] 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.

[0029] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment 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 indicator will also change accordingly.

[0030] This embodiment discloses an interlocking cavity structure, which is suitable for assembly and use in the narrow and vulnerable area of ​​the feed inlet of the die-casting mold fixed mold assembly. It can effectively solve the technical defects of traditional complete cavity block feed inlets that are easily deformed by alternating high pressure impact of molten metal, resulting in high maintenance and replacement costs. Conventional insert locking structures occupy a large space, cannot withstand impact loads, and are prone to loosening and detachment. It has the advantages of being suitable for narrow and confined spaces, having high locking strength, convenient assembly and disassembly, allowing for individual replacement of vulnerable inserts, and stable operation under long-term die-casting conditions. It can be widely used for the modification of the fixed mold feed inlet cavity and the design of new molds for die-casting molds used in the production of various non-ferrous metal die-casting parts such as automotive parts, home appliance parts, and communication devices.

[0031] Specifically, refer to Figures 1 to 5 This modular cavity structure includes a cavity block body 100, a cavity insert 200, and a locking element 300.

[0032] Among them, the cavity block body 100 is a core base component for fixed mold forming. The cavity block body 100 has a matching insert hole 110 inside, which matches the shape of the cavity insert 200. The insert hole 110 is opened through the metal liquid filling feeding direction. The inner wall of the insert hole 110 is integrally formed with a first snap-fit ​​part 120.

[0033] The cavity insert 200 is molded separately as an independent vulnerable part and is installed inside the insert hole 110. The outer wall of the cavity insert 200 is machined to form a second snap-fit ​​part 210 corresponding to the position of the first snap-fit ​​part 120. After the cavity insert 200 is assembled, the first snap-fit ​​part 120 and the second snap-fit ​​part 210 are aligned and fitted together, and their inner walls together form a closed snap-fit ​​space.

[0034] The locking component 300 is assembled and installed on the side wall of the cavity block body 100. One end of the locking component 300 extends laterally into the snap-fit ​​space. Through the cooperation and compression between the locking component 300 and the snap-fit ​​space, the cavity insert 200 is radially locked and fixed in the insert hole 110, which restricts the cavity insert 200 from displacement and loosening due to the impact of molten metal.

[0035] The core locking structure of this solution is a lateral compression locking structure with a snap-fit ​​part and a conical locking part 300. Unlike the traditional axial locking method of bolts, pressure plates, and pins, the locking part 300 extends laterally into the snap-fit ​​space from the side of the cavity block body 100. It does not require the arrangement space of the inlet and outlet pouring channels, cooling water channels, and venting grooves, and is perfectly adapted to the narrow and restricted installation environment around the inlet.

[0036] The end of the locking member 300 that extends into the snap-fit ​​space fits tightly against the inner wall of the snap-fit ​​space. During the axial advancement of the locking member 300, a uniform radial extrusion force is continuously applied to the first snap-fit ​​part 120 and the second snap-fit ​​part 210, firmly pressing the cavity insert 200 against the inner wall of the insert hole 110. This can withstand the high-frequency, high-pressure alternating impact load at the feed port during the die-casting process, preventing the cavity insert 200 from loosening, shifting, or falling off during long-term operation.

[0037] In one preferred embodiment, the first snap-fit ​​portion 120 adopts a structure of multiple sets of evenly distributed first snap-fit ​​recesses, and the second snap-fit ​​portion 210 is configured as a second snap-fit ​​recess whose number, position, and outline correspond one-to-one with the first snap-fit ​​recesses.

[0038] Specifically, multiple arc-shaped inner grooves are opened circumferentially along the inner wall of the inlay hole 110 of the cavity block body 100 as the first locking recess, and a matching arc-shaped outer groove is opened at the corresponding position on the outer wall of the cavity block 200 as the second locking recess. After the cavity block 200 is inserted into the inlay hole 110 and completed for alignment, each set of the relatively arranged first locking recess and the second locking recess together form an independent locking space.

[0039] Multiple sets of snap-fit ​​spaces are evenly arranged circumferentially, and the end of the locking member 300 can simultaneously extend into the interior of all snap-fit ​​spaces to achieve circumferential multi-point uniform locking of the cavity insert 200, further improving the overall connection rigidity, dispersing the impact load of the feed port, and avoiding local deformation of the cavity insert 200 caused by single-point stress concentration.

[0040] Furthermore, each set of locking spaces formed by the first locking recess and the second locking recess has an overall conical structure. The large end of the locking space is the entrance end into which the locking member 300 is embedded, and the small end of the locking space faces the depth inside the mounting hole 110.

[0041] By fitting the tapered end of the locking member 300 with the tapered engagement space, when the locking member 300 is pushed in laterally, the tapered end of the locking member 300 continuously squeezes along the tapered surface to the large end of the engagement space. The component force of the tapered surface is converted into a radial locking force, which simultaneously presses the cavity insert 200 inward and supports the inner wall of the insert hole 110 outward, forming a two-way self-locking structure.

[0042] During the die casting process, the impact load of the molten metal on the cavity insert 200 will further press the conical mating surface. The greater the impact load, the stronger the self-locking force of the conical surface, which greatly improves the locking reliability under high impact conditions.

[0043] In the preferred assembly structure of this scheme, the overall installation direction of the locking component 300 is perpendicular to the assembly direction of the cavity insert 200 embedded in the insert hole 110. The operator can directly operate the locking component 300 from the outer side wall of the cavity block body 100 to complete the push-in locking and pull-out unlocking operations.

[0044] This side assembly layout completely avoids the axial space of the feed inlet, and will not interfere with the processing and layout of surrounding functional structures such as the gating channel, cooling water channel, and venting groove. It does not require reducing the original mold cooling, venting, and flow channel dimensions, and does not affect the original filling, cooling, and venting performance of the mold. It is compatible with the modification and upgrading of various existing mature mold cavity structures, and the mold modification cost is low and the compatibility range is wide.

[0045] Furthermore, the locking component 300 adopts a cylindrical shaft-shaped integral structure. The end of the locking component 300 that extends into the snap-fit ​​space is machined into a tapered head that perfectly matches the contour of the tapered snap-fit ​​space. The cylindrical section of the main body of the locking component 300 and the through hole on the cavity block body 100 for passing through the locking component 300 slide together. When the locking component 300 is pushed forward along its own axial direction, the tapered head continuously squeezes the first snap-fit ​​recess and the second snap-fit ​​recess on both sides of the snap-fit ​​space, continuously outputting a stable radial locking force, which completely limits and fixes the cavity insert 200 inside the insert hole 110, eliminating the assembly gap between the cavity insert 200 and the insert hole 110, and preventing minor movement and wear under impact.

[0046] Preferably, this interlocking cavity structure is also equipped with a pre-fixed assembly structure. The side wall of the cavity block body 100 is provided with an installation hole 130 that communicates with the interlocking hole 110. The wall of the installation hole 130 is provided with a through bolt hole 140 in the vertical direction of the locking member 300. The outer side wall of the cavity insert 200 is machined with a first threaded hole 220 of matching specifications at the position corresponding to the bolt hole 140.

[0047] During assembly, the cavity insert 200 is first inserted into the insert hole 110 to complete the alignment. Then, a fastening bolt is used to pass through the bolt through hole 140 from the outside of the cavity block body 100 and screwed into the first threaded hole 220 of the cavity insert 200 to achieve temporary pre-fixation of the cavity insert 200. After pre-fixation, the cavity insert 200 will not tilt or shift, making it convenient for the operator to push the locking part 300 in from the side to complete the final locking. This greatly reduces the difficulty of assembly alignment and improves the operational efficiency of mold assembly and insert replacement.

[0048] This solution also discloses a fixed mold assembly, which is equipped with the insert-type cavity structure described in any of the above embodiments. Relying on the lateral conical snap-fit ​​self-locking structure, it solves the industry pain points of traditional inlet area inserts having no installation space, insufficient locking strength, and easy loosening and failure. Only the cavity insert 200 needs to be replaced to complete the repair of the vulnerable area of ​​the inlet, which greatly reduces the mold downtime, reduces the maintenance wear of the mold base, and extends the service life of the cavity block body 100.

[0049] Specifically, this fixed mold assembly includes a fixed mold frame 400 and an inlaid cavity structure. The cavity block body 100 is integrally embedded and fixed in the forming station inside the fixed mold frame 400. The locking member 300 is arranged horizontally through the mold frame 400. The first end of the locking member 300 passes through the side wall of the fixed mold frame 400 and the side wall of the cavity block body 100 in sequence, and finally extends into the snap-fit ​​space to complete the locking. The second end of the locking member 300 is completely housed in the cavity inside the side wall of the fixed mold frame 400. The fixed mold frame 400 protects the exposed end of the locking member 300, avoiding metal flying, high temperature oxidation, and scratches on the end of the locking member 300 during the die casting process, and ensuring the long-term assembly and disassembly accuracy of the locking member 300.

[0050] Furthermore, the second end face of the locking member 300 housed inside the fixed mold frame 400 is provided with a recessed second threaded hole 310, which can be threadedly connected to external disassembly tools such as wrenches and pull screws.

[0051] When the mold needs to replace the cavity insert 200, the external pulling tool is screwed into the second threaded hole 310 and pulled outward along the axial direction of the locking member 300. This quickly removes the locking member 300 from the snap-fit ​​space, the cavity block body 100, and the fixed mold frame 400, releasing the locking limit on the cavity insert 200. The worn and deformed cavity insert 200 can be quickly removed. After assembling the new cavity insert 200, the locking steps are repeated to restore mold production. The disassembly and assembly process is simple and efficient.

[0052] Preferably, the outer wall of the fixed mold frame 400 is machined with a matching receiving hole at the position corresponding to the second end of the locking member 300, and the receiving hole is threadedly connected to the sealing block 410. After the sealing block 410 is fully installed, the inner end face of the sealing block 410 is tightly abutted against the end face of the second end of the locking member 300, applying an axial limiting constraint force to the locking member 300, offsetting the axial reverse thrust of the locking member 300 during the die casting impact, preventing the locking member 300 from loosening after impact, and further improving the long-term working stability of the overall locking structure. At the same time, the sealing block 410 can isolate the high temperature of die casting and metal flying material, protect the second threaded hole 310 at the end of the locking member 300 from being blocked or corroded, and ensure that the subsequent disassembly and assembly tools can be smoothly screwed in.

[0053] This solution further discloses a die-casting mold equipped with the aforementioned fixed mold assembly. By adopting a lateral conical snap-fit ​​self-locking cavity structure adapted to narrow feed inlet spaces, it eliminates the need for frequent downtime for welding and grinding repairs of the cavity block body 100, effectively reducing mold maintenance time and repair costs on the die-casting production line, avoiding repeated repairs that damage the cavity base material, and extending the overall service life of the mold. At the same time, the locking structure has a strong impact load bearing capacity, and the cavity insert 200 has no risk of loosening or displacement, stably ensuring the forming dimensional accuracy of the die-casting part in the feed inlet area, reducing defects such as burrs, missing material, and dimensional deviations in the casting, improving the yield rate of die-casting products, and meeting the needs of large-scale continuous production of high-precision die-casting parts in the automotive, home appliance, and communications industries.

[0054] This solution adopts a side-conical snap-fit ​​self-locking insert structure. Compared with the traditional threaded locking, side pressure plate, and pin positioning insert structure, it does not occupy the narrow axial space of the feed inlet, and does not interfere with the layout of the pouring channel, cooling water channel, and venting groove. The structure is compact. Relying on the bidirectional self-locking principle of the conical surface, the greater the impact load, the stronger the locking force. It can withstand the high pressure alternating impact load of die casting for a long time, and completely solves the problem of insert loosening and failure in narrow and vulnerable areas. Mold repair can be completed by replacing only the cavity insert 200, which greatly shortens the downtime for maintenance and reduces the operation and maintenance cost. It also has multiple advantages such as strong space adaptability, high locking strength, convenient assembly and disassembly, and stable long-term operation.

[0055] It should be noted that in this utility model, 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 those features. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly defined. 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 defined. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0056] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When 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 this utility model.

[0057] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model 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 this utility model or exceeding the scope defined by the appended claims.

Claims

1. A modular cavity structure, characterized in that, include: The cavity block body is provided with a splicing hole, and a first snap-fit ​​part is provided on the wall of the splicing hole; A cavity insert is fitted into the insert hole. The outer side wall of the cavity insert is provided with a second snap-fit ​​part that cooperates with the first snap-fit ​​part. The first snap-fit ​​part and the second snap-fit ​​part together form a snap-fit ​​space. A locking element is installed on the cavity block body, and one end of the locking element extends into the snap-fit ​​space to fix the cavity insert.

2. The interlocking cavity structure as described in claim 1, characterized in that, The first snap-fit ​​portion consists of multiple spaced-apart first snap-fit ​​recesses, and the second snap-fit ​​portion consists of multiple second snap-fit ​​recesses that correspond one-to-one with the first snap-fit ​​recesses.

3. The interlocking cavity structure as described in claim 2, characterized in that, The locking space is conical, and the larger end of the locking space is located at the entrance end where the locking member is embedded in the locking space.

4. The interlocking cavity structure as described in claim 1, characterized in that, The locking member is installed in a direction perpendicular to the cavity insert in the insert hole, so that the locking member can be operated from the side of the cavity block body.

5. The interlocking cavity structure as described in claim 1, characterized in that, The locking member is a shaft-shaped structure, and the end of the locking member that extends into the locking space is tapered and adapted to the locking space, so as to apply a radial locking force to the first locking part and the second locking part when the locking member is axially advanced.

6. The interlocking cavity structure as described in claim 1, characterized in that, The cavity block body is provided with a mounting hole that communicates with the inlay hole. The wall of the mounting hole is provided with a bolt through hole. The cavity insert is provided with a first threaded hole corresponding to the bolt through hole. The bolt passes through the bolt through hole and connects with the first threaded hole to provide pre-fixation for the cavity insert.

7. A fixed mold assembly, characterized in that, include: Fixed mold frame; The interlocking cavity structure as described in any one of claims 1 to 6; wherein, The cavity block body is installed on the fixed mold frame. The first end of the locking member passes through the fixed mold frame and the cavity block body in sequence and is embedded in the snap-fit ​​space. The second end of the locking member is located inside the fixed mold frame and is used to provide protection for the locking member.

8. The mold assembly as described in claim 7, characterized in that, The second end of the locking member is provided with a second threaded hole, which is used to connect with an external tool for removing the locking member.

9. The fixed mold assembly as described in claim 8, characterized in that, A sealing block is threaded onto the outer wall of the fixed mold frame, and the sealing block abuts against the second end of the locking member.

10. A die-casting mold, characterized in that, Includes the mold assembly as described in any one of claims 8 to 9.

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