High-pressure die for automobile corner angles

Abstract

The utility model relates to the technical field of die-casting dies, and discloses a high-pressure die for automobile edges and corners, which comprises an upper fixing plate and a lower fixing plate, an upper die is arranged in the upper fixing plate, a lower die is arranged in the lower fixing plate, the upper die and the lower die are distributed oppositely, and the upper die and the lower die are used for forming a die-casting cavity. A hole drawing part is arranged in the circumferential direction of the die-casting cavity, the hole drawing part comprises a plurality of sliding blocks, the sliding blocks are oppositely distributed on the two sides of the die-casting cavity, a hole drawing rod is arranged on the side, close to the die-casting cavity, of each sliding block, and the sliding blocks are used for driving the hole drawing rods to move in the direction close to or away from the die-casting cavity; limiting blocks are further arranged at the positions, corresponding to the sliding blocks, of the upper fixing plate, and the limiting blocks are used for pushing the sliding blocks to move in the direction close to the die-casting cavity. The die-casting die has the advantage of being good in part die-casting production effect.

Description

Technical Field

[0001] This utility model relates to the field of die-casting mold technology, specifically to a high-pressure mold for automotive rhombuses. Background Technology

[0002] In the automobile manufacturing process, various parts typically need to be assembled. To ensure sufficient structural strength and improve the quality and safety of the vehicle, these parts are usually metal. During the production of these metal parts, die casting is used to integrally mold them, meeting the automotive industry's demands for high-quality, lightweight, and mass-production parts manufacturing.

[0003] For example, patent document CN 219402265U discloses a die-casting mold for automotive parts, including a panel, upper mold plate, lower mold plate, and base plate arranged sequentially, as well as a gating assembly, an ejection assembly, and a core-pulling assembly. A female mold core is embedded in the lower surface of the upper mold plate, and a male mold core is embedded in the upper surface of the lower mold plate. The gating assembly includes a runner, the outlet of which is flush with the lower surface of the upper mold plate. A protruding buffer portion is provided on the upper surface of the lower mold plate, which can be inserted into and tightly connected to the runner. A notch is provided on the side of the buffer portion facing the male mold core to connect the runner and the cavity of the male mold core. Protruding positioning portions are provided at the four corners of the male mold core, and positioning grooves are provided at the four corners of the female mold core. This technical solution, by providing a buffer portion and a notch within the buffer portion, can decelerate and buffer the high-pressure fluid in the runner, preventing the high-pressure fluid from directly impacting the cavity and causing erosion and wear, thus improving the mold's lifespan.

[0004] While the aforementioned technical solutions can achieve high-pressure die casting of parts and improve mold life, some parts, due to their structural characteristics, often require through holes. This necessitates the use of two opposing core-pulling components within the mold during die casting to create the through-hole structure. However, during processing with these two core-pulling components, gaps can easily exist between them, leading to molten metal seeping into the through-hole after die casting. This prevents the formation of a completely through-hole, requiring secondary grinding after die casting to ensure the through-hole's continuity. This increases the number of processing steps and impacts the efficiency of the die casting process. Utility Model Content

[0005] The present invention aims to provide a high-pressure mold for automotive corners to solve the technical problem that in the prior art, the through holes of the parts still need to be ground twice after die casting, which affects the efficiency of die casting.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a high-pressure mold for automotive rhombuses, comprising an upper fixed plate and a lower fixed plate, wherein an upper mold is provided in the upper fixed plate and a lower mold is provided in the lower fixed plate, the upper mold and the lower mold are distributed facing each other, and the upper mold and the lower mold are used to form a die-casting cavity, wherein a hole-drawing portion is provided circumferentially in the die-casting cavity, the hole-drawing portion comprising a plurality of sliders, the plurality of sliders being distributed facing each other on both sides of the die-casting cavity, wherein a hole-drawing rod is provided on the side of the slider near the die-casting cavity, the slider being used to drive the hole-drawing rod to move in a direction closer to or away from the die-casting cavity; a limiting block is also provided at the corresponding position of the upper fixed plate and the slider, the limiting block being used to push the slider to move in a direction closer to the die-casting cavity.

[0007] The principle and advantages of this solution are as follows: During the die-casting production of parts, the upper and lower fixed plates are closed, so that the upper and lower molds between the upper and lower fixed plates can form a die-casting cavity. Molten metal is injected into the die-casting cavity, filling it completely. During the die-casting process, the extraction holes on both sides of the lower mold block the corresponding positions in the die-casting cavity, so that the corresponding positions of the extraction holes can form through holes after die-casting. After the filled molten metal cools and solidifies in the die-casting cavity to form the part, the core is pulled out through the through holes of the part by the extraction holes, and then the upper and lower molds are opened for demolding.

[0008] In this solution, during the die-casting production of parts, opposing drawing sections are set on both sides of the die-casting cavity to draw through-holes in the parts. This allows both ends of the through-holes to be drawn simultaneously, improving the ease of drawing and demolding. Furthermore, by setting limiting blocks at corresponding positions on the upper fixed plate and the drawing sections, after the upper and lower molds are closed, the limiting blocks can push the drawing sections towards the die-casting cavity. This ensures a tight fit between the drawing sections on both sides of the die-casting cavity, preventing gaps that could result in burrs or blockages inside the through-holes after die-casting. This guarantees the continuity of the through-holes after die-casting and avoids the need for secondary grinding of the through-holes, thus improving the efficiency of part processing.

[0009] Preferably, as an improvement, a feed pipe is provided on one side of the lower mold and the upper mold; the die-casting cavity includes multiple die-casting cavities, which are distributed facing each other on both sides of the feed pipe. This allows multiple parts to be die-cast simultaneously during die-casting production, improving the die-casting production efficiency.

[0010] Preferably, as an improvement, a feed trough is provided between the feed pipe and the die-casting cavity. One end of the feed trough is connected to the feed pipe, and the other end of the feed trough is connected to the middle of the die-casting cavity in its extending direction. This allows molten metal to be supplied to multiple die-casting cavities sequentially from the middle to both ends of the die-casting cavity when the molten metal is being supplied. This reduces the distance between the molten metal and the two ends of the die-casting cavity, preventing the distance from being too long and thus avoiding insufficient filling of the die-casting cavity by the molten metal, which would affect the production quality of the parts.

[0011] Preferably, as an improvement, the slider is provided with a driving hole that penetrates the slider. The driving hole is inclined from the side of the slider near the lower fixed plate towards the side of the slider away from the lower fixed plate and towards the die-casting cavity. A driving rod is provided at a corresponding position on the upper fixed plate, and the inclination direction of the driving rod is consistent with the driving direction of the driving hole. This allows the core-pulling part to automatically move towards or away from the die-casting cavity as the upper mold and die-casting cavity open and close during core-pulling processing, improving the convenience of core-pulling while avoiding the need for other driving structures to move the core-pulling part, thus improving the synchronization between the core-pulling part and the die-casting process.

[0012] Preferably, as an improvement, the end of the limiting block away from the upper fixed plate, near the die-casting cavity, is inclined towards the upper mold; the slider and the limiting block are provided with limiting protrusions at corresponding positions, and the inclination angle of the end of the limiting protrusion away from the die-casting cavity is consistent with the inclination angle of the end of the limiting block near the die-casting cavity. This ensures that when the limiting block limits the slider, the inclination surface improves the accuracy of the contact position between the limiting block and the slider, while also ensuring that the limiting block gradually pushes the slider towards the die-casting cavity as the upper mold and die-casting cavity close. This improves the matching between the position of the limiting block and the slider and the actual opening and closing of the mold, avoiding direct hard contact between the limiting block and the slider, which could lead to collisions and damage to the mold structure.

[0013] Preferably, as an improvement, the slider is further provided with a limiting frame in its circumferential direction, and the limiting frame is distributed around the circumference of the slider. This allows the slider to be limited by the limiting frame when moving towards or away from the die-casting cavity, ensuring the smoothness of the slider's sliding.

[0014] Preferably, as an improvement, a limiting rod is provided at the end of the slider away from the die-casting cavity. One end of the limiting rod is connected to the slider, and the other end passes through the limiting frame and extends away from the die-casting cavity. An elastic element is provided between the end of the limiting rod away from the slider and the limiting frame. This ensures that the hole-drawing part can fit tightly in the die-casting cavity under the pre-tightening force of the limiting rod and the elastic element, reducing the possibility of molten metal seeping into the gaps, thereby avoiding the generation of flash and burrs. Furthermore, the combination of the limiting rod and the elastic element ensures the accurate positioning of the hole-drawing part when the mold is closed, improving the dimensional accuracy of the die-cast parts. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the high-pressure mold structure for the car rhombus in this embodiment of the present invention.

[0016] Figure 2 This is a schematic diagram of the upper fixing plate structure in an embodiment of this utility model.

[0017] Figure 3 This is a schematic diagram of the lower fixing plate structure in an embodiment of this utility model.

[0018] Figure 4 This is a schematic diagram of the limiting block and limiting protrusion structure in an embodiment of the present invention. Detailed Implementation

[0019] The following detailed description illustrates the specific implementation method:

[0020] The reference numerals in the accompanying drawings include: upper fixing plate 1, upper mold 101, upper fixing groove 102, lower fixing plate 2, lower mold 201, die casting protrusion 202, venting groove 203, connecting plate 3, lower fixing groove 301, connecting column 4, feed pipe 5, feed groove 501, hole extraction part 6, slider 601, hole extraction rod 602, drive hole 603, drive rod 604, limit block 605, limit protrusion 606, limit frame 7, limit rod 701, elastic element 702, and ejector rod 8.

[0021] As attached Figure 1 With appendix Figure 2 As shown, a high-pressure mold for car rhombuses includes an upper fixed plate 1 and a lower fixed plate 2. An upper mold 101 is provided in the upper fixed plate 1, and a lower mold 201 is provided in the lower fixed plate 2. A die-casting cavity for die-casting processing is provided between the upper mold 101 and the lower mold 201.

[0022] The upper fixing plate 1 and the lower fixing plate 2 are stacked together. An upper mold 101 is embedded in the facing surfaces of the upper fixing plate 1 and the lower fixing plate 2. The upper mold 101 is fixedly connected to the upper fixing plate 1 by bolts or welding. A lower mold 201 is embedded in the facing surfaces of the lower fixing plate 2 and the upper fixing plate 1. The positions of the upper mold 101 and the lower mold 201 correspond. The specific structure of the upper mold 101 and the lower mold 201 matches the shape of the die-cast end cap. The specific details of the upper mold 101 and the lower mold 201 are existing technologies and will not be described in detail here.

[0023] The upper fixing plate 1 is used to fix the position of the upper mold 101. Upper fixing grooves 102 are provided on both sides of the upper fixing plate 1, parallel to each other and extending through both sides of the upper fixing plate 1 along a direction perpendicular to its width. The upper fixing grooves 102 are used for engaging with external equipment. A connecting plate 3 is provided on the side of the lower fixing plate 2 away from the lower mold 201. The connecting plate 3 is fixedly connected to the lower fixing plate 2 by bolts. A lower fixing groove 301 is provided on the side of the connecting plate 3, extending through both sides of the connecting plate 3 along a direction perpendicular to its height. There are two connecting plates 3, parallel to each other on both sides of the bottom of the lower fixing groove 301, with the lower fixing groove 301 on opposite sides of the connecting plate 3. The connecting plate 3 is used for engaging with external equipment via the lower fixing groove 301.

[0024] Multiple connecting posts 4 are provided between the upper fixed plate 1 and the lower fixed plate 2. These connecting posts 4 are evenly distributed along the circumference of the lower fixed plate 2 on the facing surfaces of the upper and lower fixed plates 1 and 2, and are spaced apart on the upper fixed plate 1 and between it and the upper mold 101. One end of each connecting post 4 is connected to the upper fixed plate 1 via a snap-fit, and the other end extends outward away from the upper fixed plate 1. Connecting holes are provided at corresponding positions on the lower fixed plate 2 and each connecting post 4, allowing the connecting posts 4 to pass through. The upper fixed plate 1 and the lower fixed plate 2 are connected to the connecting posts 4 via these connecting holes. This ensures that the upper mold 101 and the lower mold 201 are guided by the connecting posts 4 when being connected or separated, guaranteeing the accuracy of the connection between the upper mold 101 and the lower mold 201.

[0025] Multiple die-casting protrusions 202 are integrally formed on the top of the lower mold 201, and these protrusions are spaced apart on the side of the lower mold 201 near the upper mold 101. The die-casting protrusions 202 protrude from the surface of the lower mold 201, and their specific shapes match the shape of the cylinder head to be die-cast. Die-casting grooves are integrally formed on the upper mold 101 at corresponding positions to the die-casting protrusions 202. These grooves are recessed into the surface of the upper mold 101, allowing the die-casting protrusions 202 to fit within them. A circumferentially sealed gap is reserved between the die-casting protrusions 202 and the die-casting grooves, forming a die-casting cavity. The specific structures of the die-casting grooves and protrusions 202 are existing technology and will not be described further here.

[0026] As attached Figure 3 As shown, a feed pipe 5 is provided on one side of the lower mold 201 and the upper mold 101. One end of the feed pipe 5 is connected to the die-casting cavity, and the other end extends upward along the plane perpendicular to the lower mold 201. The end of the feed pipe 5 away from the lower mold 201 passes through the upper fixed plate 1. The feed pipe 5 is used to transport molten metal raw materials into the die-casting cavity.

[0027] Multiple die-casting cavities are distributed facing each other on both sides of the feed pipe 5, and the die-casting cavities on both sides of the feed pipe 5 are symmetrically distributed. Specifically, in this embodiment, there are two die-casting cavities, which are symmetrically distributed on both sides of the feed pipe 5, that is, the feed inlets of the die-casting cavities are distributed facing each other on both sides of the feed pipe 5. A feed groove 501 is provided on the lower mold 201 between the feed pipe 5 and the die-casting cavity. One end of the feed groove 501 is connected to the feed pipe 5, and the other end of the feed groove 501 extends towards the die-casting cavity. The end of the feed groove 501 near the die-casting cavity is connected to the middle part of the extension direction of the die-casting cavity. The feed groove 501 is used to transport molten metal into the die-casting cavity through the middle part of the extension direction of the die-casting cavity. By symmetrically distributing multiple die-casting cavities on both sides of the feed pipe 5, the filling progress of the molten metal material in each die-casting cavity can be kept consistent when the feed pipe 5 injects molten metal material into each die-casting cavity. This ensures the consistency of parameters and progress during die-casting production in each die-casting cavity, and avoids quality differences when multiple die-casting cavities are die-casting simultaneously, which would affect the overall quality of the die-casting process of the parts.

[0028] Each die-casting cavity is provided with a circumferentially oriented extraction section 6, which includes multiple sliders 601. These sliders 601 are distributed facing each other on both sides of the die-casting cavity. One end of each slider 601 is located on one side of the die-casting cavity, and the other end extends downwards along the edge of the fixing plate 2 away from the die-casting cavity. An extraction rod 602 is fixedly connected to the end of each slider 601 near the die-casting cavity via threads or welding. One end of the extraction rod 602 is fixedly connected to the slider 601, and the other end extends into the die-casting cavity. The extraction rods 602 on both sides of the die-casting cavity are correspondingly distributed. A sliding groove is provided at the corresponding position of the lower fixing plate 2 and the slider 601. The slider 601 can move along the groove towards or away from the die-casting cavity. The specific structure of the sliding connection between the slider 601 and the die-casting cavity is prior art and will not be described further here.

[0029] A drive hole 603 is provided at the end of the slider 601 away from the lower fixed plate 2 and near the die-casting cavity. The drive hole 603 extends through the top and bottom of the slider 601. The drive hole 603 is inclined from the side of the slider 601 near the lower fixed plate 2 toward the side of the slider 601 away from the lower fixed plate 2 toward the die-casting cavity. A drive rod 604 is bolted or snapped to the corresponding position of the upper fixed plate 1 and the drive hole 603. One end of the drive rod 604 is fixedly connected to the upper fixed plate 1, and the other end extends toward the lower fixed plate 2. The inclination direction of the drive rod 604 is consistent with the driving direction of the drive hole 603. The drive rod 604 is used to drive the slider 601 to move toward or away from the die-casting cavity through the drive hole 603 during the up and down movement of the upper fixed plate 1. This allows the hole-pulling part 6 to automatically move towards or away from the die-casting cavity as the upper mold 101 and the die-casting cavity open and close during the core-pulling process. This improves the convenience of hole-pulling and avoids the need for other driving structures to move the hole-pulling part 6, thus improving the synchronization between the hole-pulling part 6 and the die-casting process.

[0030] A limiting block 605 is also bolted to the corresponding position of the upper fixed plate 1 and the slider 601. One end of the limiting block 605 is fixedly connected to the upper fixed plate 1, and the other end extends towards the slider 601. (See attached image) Figure 4As shown, the limiting block 605 is inclined towards the upper mold 101 on the side near the slider 601 and close to the die-casting cavity. A limiting protrusion 606 is integrally formed at the corresponding position of the slider 601 and the limiting block 605, and the inclination angle of the end of the limiting protrusion 606 away from the die-casting cavity is consistent with the inclination angle of the end of the limiting block 605 close to the die-casting cavity. This ensures that when the limiting block 605 limits the slider 601, the inclined surface improves the accuracy of the contact position between the limiting block 605 and the slider 601, while also ensuring that the limiting block 605 gradually pushes the slider 601 towards the die-casting cavity as the upper mold 101 closes to the die-casting cavity. This improves the matching between the position of the limiting block 605 and the slider 601 and the actual opening and closing of the mold, avoiding direct hard contact between the limiting block 605 and the slider 601, which could lead to collisions and damage to the mold structure.

[0031] A limiting frame 7 is also provided around the slider 601. The limiting frame 7 is distributed around the slider 601. The limiting frame 7 is fixedly connected to the lower fixed plate 2 by bolts. Specifically, the limiting frame 7 is a "U" shaped frame. The extension direction of the limiting frame 7 is consistent with the movement direction of the slider 601. The slider 601 can move within the limiting frame 7 in the direction of approaching or moving away from the die-casting cavity. A limiting rod 701 is provided at the end of the slider 601 away from the die-casting cavity. One end of the limiting rod 701 is fixedly connected to the slider 601 by a thread, and the other end passes through the limiting frame 7 and extends away from the die-casting cavity. An elastic element 702 is provided between the end of the limiting rod 701 away from the slider 601 and the limiting frame 7. One end of the elastic element 702 is fixedly connected to the end of the limiting rod 701 away from the slider 601 by a structure such as a buckle, and the other end of the elastic element 702 is fixedly connected to the limiting frame 7 by a structure such as a buckle. The elastic element 702 is used to drive the slider 601 to move closer to the die-casting cavity through the limiting rod 701. The elastic element 702 can be a spring, elastic band, or other elastic element. Preferably, in this embodiment, the elastic element 702 is a tension spring to drive the limiting rod 701 to move. This allows the hole-drawing part 6 to fit tightly within the die-casting cavity under the pre-tightening force of the limiting rod 701 and the elastic element 702, reducing the possibility of molten metal seeping into the gaps and thus avoiding the generation of flash and burrs. Furthermore, the combination of the limiting rod 701 and the elastic element 702 ensures the accurate positioning of the hole-drawing part 6 during mold closing, improving the dimensional accuracy of the die-cast parts.

[0032] Multiple venting grooves 203 are provided on the lower mold 201, located at both ends of the die-casting cavity. One end of each venting groove 203 communicates with the die-casting cavity, and the other end extends to the edge of the lower mold 201. The venting grooves 203 are used to expel air from the die-casting cavity during the die-casting process. The specific structure of the venting grooves 203 is existing technology and will not be described in detail here. This ensures that air can be vented from both ends of the die-casting cavity during the die-casting process, guaranteeing a balance of air pressure at both ends and ensuring the uniformity of molten metal filling within the die-casting cavity.

[0033] Multiple ejector rods 8 are provided on the lower mold 201. The ejector rods 8 are evenly distributed in the die-casting cavity of the lower mold 201. One end of the ejector rod 8 passes through the bottom of the die-casting cavity, and the other end of the ejector rod 8 passes through the lower fixed plate 2 and extends away from the lower mold 201. The ejector rod 8 can move in the direction of approaching or away from the lower mold 201. The ejector rod 8 is used to eject and unload the die-cast parts after die-casting is completed. The specific structure and movement of the ejector rod 8 are existing technologies and will not be described in detail here.

[0034] The specific implementation process is as follows:

[0035] During die casting production of parts, the upper fixed plate 1 and the lower fixed plate 2 are closed, so that the upper mold 101 and the lower mold 201 between the upper fixed plate 1 and the lower fixed plate 2 can form a die casting cavity. Molten metal is injected into the die casting cavity, so that the molten metal fills the die casting cavity. During the die casting process, the extraction holes 6 on both sides of the lower mold 201 block the corresponding positions of the die casting cavity, so that the corresponding positions of the extraction holes 6 can form through holes after die casting. After the filled molten metal cools and solidifies in the die casting cavity to form a part, the core is extracted through the through holes of the part by the extraction holes 6, and then the upper mold 101 and the lower mold 201 are opened for demolding.

[0036] Compared to existing technologies, this solution, during the die-casting production of parts, utilizes opposing hole-drawing sections 6 on both sides of the die-casting cavity to draw holes at the through-hole positions of the parts. This allows for simultaneous hole-drawing at both ends of the through-hole, improving the ease of hole-drawing and facilitating demolding. Furthermore, by setting limiting blocks 605 at corresponding positions on the upper fixed plate 1 and the hole-drawing sections 6, after the upper mold 101 and lower mold 201 are closed, the limiting blocks 605 can push the hole-drawing sections 6 towards the die-casting cavity. This ensures a tight fit between the hole-drawing sections 6 on both sides of the die-casting cavity, preventing gaps that could result in burrs or blockages inside the through-hole after die-casting. This guarantees the continuity of the through-hole after die-casting and avoids the need for secondary grinding of the through-hole after part processing, thus improving part processing efficiency.

[0037] It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall 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 high-pressure die for automotive corners, comprising an upper fixed plate and a lower fixed plate, wherein an upper die is disposed within the upper fixed plate, and a lower die is disposed within the lower fixed plate, the upper die and the lower die being distributed facing each other, and the upper die and the lower die forming a die-casting cavity, characterized in that: The die-casting cavity is provided with a circumferentially oriented extraction section, which includes multiple sliders distributed on both sides of the die-casting cavity. Each slider has an extraction rod on the side closer to the die-casting cavity, and the slider is used to drive the extraction rod to move in a direction closer to or away from the die-casting cavity. The upper fixing plate is also provided with a limiting block at the corresponding position of the slider, and the limiting block is used to push the slider to move closer to the die-casting cavity.

2. The high-pressure mold for automotive rhombuses according to claim 1, characterized in that: The lower mold and the upper mold are provided with a feed pipe on one side; the die-casting cavity includes multiple die-casting cavities, which are distributed facing each other on both sides of the feed pipe.

3. The high-pressure mold for automotive rhombuses according to claim 2, characterized in that: A feed trough is provided between the feed pipe and the die-casting cavity. One end of the feed trough is connected to the feed pipe, and the other end of the feed trough is connected to the middle part of the die-casting cavity in the extending direction.

4. The high-pressure mold for automotive rhombuses according to claim 1, characterized in that: The slider is provided with a driving hole that passes through the slider. The driving hole is inclined from the side of the slider near the lower fixed plate to the side of the slider away from the lower fixed plate and towards the die-casting cavity. The upper fixed plate is provided with a driving rod at the corresponding position of the driving hole. The inclination direction of the driving rod is consistent with the driving direction of the driving hole.

5. The high-pressure mold for automotive rhombuses according to claim 1, characterized in that: The side of the limiting block that is away from the upper fixed plate and close to the die-casting cavity is inclined toward the upper mold; the slider and the limiting block are provided with limiting protrusions at corresponding positions, and the inclination angle of the end of the limiting protrusion away from the die-casting cavity is the same as the inclination angle of the end of the limiting block close to the die-casting cavity.

6. The high-pressure mold for automotive rhombuses according to claim 1, characterized in that: The slider is also provided with a limiting frame in the circumference, and the limiting frame is distributed around the slider in the circumference.

7. The high-pressure mold for automotive rhombuses according to claim 1, characterized in that: A limiting rod is provided at one end of the slider away from the die-casting cavity. One end of the limiting rod is connected to the slider, and the other end passes through the limiting frame and extends away from the die-casting cavity. An elastic element is provided between the end of the limiting rod away from the slider and the limiting frame.

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