Combined stamping die for automobile part casting

Abstract

The application discloses a combined stamping die for automobile part casting and relates to the technical field of molds.The combined stamping die comprises a lower die base, a lower die core embedded in the lower die base, a guide column connected with the inside of the lower die base and used for guiding the die, an upper die base connected with one end of the top of the guide column and located above the lower die base, a top plate connected with the top of the upper die base and connected with the guide column at four ends, and a limiting assembly loosened by pulling a cam wrench, wherein the limiting plate is pushed and separated from the clamping state of the buckle under the elastic action of the limiting spring, the bottom of the limiting plate is moved above the end portion of the bottom plate, the lower die core is pushed out from the inside of the lower die main body through the supporting plate when the upper die base is moved upward under the action of external power, the lower die core is quickly and conveniently disassembled, and the problem that the lower die core in the traditional embedded die is difficult to take out due to the close cooperation with the die base is effectively solved.

Description

Technical Field

[0001] This invention relates to the field of mold technology, specifically to a combined stamping mold for casting automotive parts. Background Technology

[0002] In the field of automotive parts casting, stamping dies are key tools for achieving efficient part forming. Stamping dies come in various structural forms, commonly including integral and modular types. Integral dies typically integrate the die core and die base into a single design, while modular dies separate the die core and die base for easier replacement and maintenance. Among these, the embedded mounting method is widely used in the design of many stamping dies due to its compact structure, accurate positioning, and high stability.

[0003] The embedded mounting method involves embedding the die core inside the die base, achieving high-precision stamping through a tight fit. This design effectively reduces the overall size of the die, saving production space, while ensuring a precise fit between the die core and the die base, improving the accuracy and consistency of stamping. Furthermore, the tight fit between the die core and the die base enhances the overall stability of the die, reducing displacement or deformation caused by vibration or impact during stamping, thereby extending the die's service life.

[0004] However, this embedded installation method also has some obvious drawbacks. Because the mold core and mold base fit together seamlessly without any obvious connection points, the mold core is difficult to remove quickly during replacement. Operators need to spend a significant amount of time and effort on disassembly and installation, severely impacting production efficiency. Furthermore, the mold core replacement and maintenance process is complex, requiring specialized tools and skilled operators, increasing maintenance costs and time. During mold core replacement, the mold needs to be shut down for an extended period, causing production interruptions, reducing production efficiency, and increasing production costs.

[0005] To address the aforementioned problems, this invention proposes a modular stamping die for casting automotive parts. While retaining the advantages of an embedded installation method, this die optimizes the installation and disassembly of the die core, enabling quick and convenient core replacement, thereby improving production efficiency and reducing maintenance costs. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a combined stamping die for casting automotive parts, which solves the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a combined stamping die for casting automotive parts, comprising:

[0008] Lower mold base;

[0009] The lower mold core is embedded inside the lower mold base;

[0010] The guide pillar is connected to the interior of the lower mold base and is used for guiding the mold during operation;

[0011] The upper mold base is connected to one end of the top of the guide post and is located above the lower mold base;

[0012] The top plate is connected to the top of the upper mold base, and the four ends of the top plate are connected to the guide posts;

[0013] The upper die core is embedded inside the upper die base and is used to cooperate with the lower die core to stamp automotive parts.

[0014] Preferably, the lower mold base includes a lower mold body, and cam wrenches are provided on both sides of the lower mold body. The cam wrenches are rotatably connected to one end of the adjusting bolt via a shaft. The adjusting wrench is slidably connected to the lower mold body, and one end of the adjusting wrench is threadedly connected to a sleeve. A slider is fitted onto one end of the sleeve. The slider is slidably connected to the inside of the limiting plate. A guide seat is provided on the top of the lower mold body for positioning the upper mold base.

[0015] By installing cam wrenches on both sides of the lower die body and connecting them to one end of the adjusting bolt via a shaft, operators can easily loosen or fix the limiting components by operating the cam wrenches. This design cleverly utilizes the rotational characteristics of the cam wrenches, combined with the adjustment function of the adjusting bolt, to facilitate the quick disassembly and installation of the lower die core. Simultaneously, the sliding connection between the slider and the inside of the limiting plate, and the threaded connection between the sleeve and the adjusting wrench, further enhance the stability and flexibility of the structure, ensuring precise coordination of all components during disassembly. Furthermore, the guide seat provides precise positioning for the upper die base, ensuring accurate alignment of the upper and lower die bases during stamping, thereby improving the precision and consistency of stamping. This structural design not only effectively solves the problem of difficult quick disassembly of the lower die core in traditional embedded molds, but also significantly improves mold maintenance efficiency and operational convenience, reducing the time and labor intensity required to replace the lower die core.

[0016] Preferably, the limiting plate has a vertical groove inside, and the groove has a T-shaped cross-section. The slider is located inside the vertical groove of the limiting plate. A horizontal slot is provided on one side of the top of the limiting plate, and the slot is engaged with the buckle through the sliding fit of the limiting plate. The buckle is provided at both ends of the support plate. The support plate is in contact with the bottom of the lower mold core. The bottom edge of the support plate is in contact with the top surface of the support platform. The support platform is located on the inner wall surface of the lower mold body.

[0017] By setting a vertical T-shaped groove inside the limiting plate and embedding the slider in it, a stable sliding fit between the slider and the limiting plate is achieved. This T-shaped groove structure ensures smooth movement of the slider in the vertical direction and prevents it from shifting in the horizontal direction, thus ensuring the accuracy and reliability of the entire limiting system. At the same time, the engagement design of the horizontal slot and buckle on the top side of the limiting plate provides a stable locking mechanism for the lower die core. When the buckle engages with the slot, the support plate is firmly fixed below the limiting plate, thereby tightly fitting the lower die core against the support platform, ensuring that the lower die core will not shift or loosen during the stamping process, thus guaranteeing the accuracy and consistency of the stamping process.

[0018] In addition, this design cleverly incorporates the structure of the support platform, which is located on the inner wall surface of the lower die body, providing stable bottom support for the support plate and further enhancing the stability of the lower die core during the stamping process. When the lower die core needs to be replaced, the cam wrench is turned to move the limiting plate under the action of the limiting spring, thereby releasing the engagement state of the buckle and the slot. At this time, the support plate can be lifted up with the movement of the limiting plate, thereby driving the lower die core to be quickly removed from the lower die body, realizing convenient disassembly of the lower die core.

[0019] This structural design not only effectively solves the problem of difficult quick disassembly of the lower mold core in traditional embedded molds, significantly improving mold maintenance efficiency and ease of operation, but also reduces reliance on specialized tools and highly skilled operators, lowering maintenance costs and time. Simultaneously, by optimizing the limiting plate and its related structures, the stability and reliability of the mold are further enhanced during frequent lower mold core replacements, avoiding the risk of mold damage due to complex disassembly processes, extending mold lifespan, reducing production costs, and improving the overall performance and practicality of the mold.

[0020] Preferably, there are two limiting plates, one side of each limiting plate is in sliding contact with a push block, the push block is located inside the insert groove, the push block is in sliding contact with the inner wall of the insert groove, the insert groove is opened on both sides of the inner wall of the lower mold body, and a limiting spring is provided inside the insert groove;

[0021] By setting two limiting plates and making one side of them slide in contact with the push block, while placing the push block in the mounting grooves on both sides of the lower mold body, this structural design achieves precise control of the movement of the limiting plates in the horizontal direction. The sliding contact between the push block and the inner wall of the mounting groove ensures the stability and guidance of the push block during movement, while the limiting springs set inside the mounting groove provide elastic support for the push block.

[0022] When the lower mold core needs to be removed, the cam wrench is activated. Through the linkage of the adjusting bolt and sleeve, the slider moves within the T-shaped groove of the limiting plate, thereby pushing the limiting plate horizontally. At this time, the elastic force of the limiting spring pushes the push block, which in turn pushes the limiting plate to move. This design of the limiting plate, push block, and related structures, by making reasonable use of sliding contact, elastic support, and automatic reset functions, significantly improves the disassembly efficiency of the lower mold core and the stability of the mold. It not only solves the problem of the difficulty in quickly disassembling the lower mold core in traditional embedded molds, but also reduces the dependence on professional tools and highly skilled operators, reduces maintenance costs and time, and enhances the stability and reliability of the mold when frequently changing the mold core, extends the service life of the mold, and improves the overall performance and practicality of the mold.

[0023] Preferably, a base plate is provided between the two limiting plates. The limiting plates are in contact with the top of both ends of the base plate through a sliding fit. An ejector plate is provided on the top of the base plate. A limiting post is provided on the top of the ejector plate. A first return spring is fitted on the outside of the limiting post. An ejector pin is embedded on the top of the ejector plate for ejecting and demolding the parts. The four ends of the base plate are connected to the bottom of the guide post by bolts. The guide post is in sliding contact with the inner wall of the positioning hole. The positioning hole is opened inside the lower mold body.

[0024] The efficient demolding function is achieved through the setting of the ejector plate and ejector pins. The first return spring provides the ejector plate with automatic reset capability, reducing manual intervention and improving production efficiency. At the same time, the cooperation between the base plate and the limit plate and the guiding role of the guide pillar enhance the stability of the entire system. The precise alignment of the guide pillar and the positioning hole reduces vibration and displacement during stamping and demolding, improving stamping accuracy and mold life. This structure not only improves demolding efficiency and product quality, but also makes the mold more convenient to disassemble and maintain, further optimizing the mold's performance and economy.

[0025] Preferably, a limiting block is fitted at one end of the guide post, and the limiting block is located at the top of the upper mold base. The upper mold base includes a movable block, and a sealing ring is fitted on the outer wall of the movable block. The outer wall of the movable block slides in contact with the inner wall of the piston groove. A spring is provided inside the piston groove to push the movable block to reset upward. The piston groove is connected to a connecting hole and a flow groove respectively. The piston groove is opened inside the upper mold body. A one-way valve core is provided inside both the connecting hole and the flow groove.

[0026] By fitting a limiting block on the top of the guide post, the movement range of the upper die holder is limited. At the same time, by utilizing the sliding fit between the movable block and the piston groove, as well as the reset function of the internal spring, precise guidance and automatic reset of the upper die holder are achieved. The connection between the piston groove and the connecting hole and the flow groove, along with the one-way valve core, further optimizes the function of the hydraulic lubrication system, ensuring reasonable distribution and automatic compensation of lubricating oil during stamping and demolding. This improves the service life and stamping efficiency of the die, reduces maintenance costs, and enhances the overall performance and reliability of the die.

[0027] Preferably, lifting blocks are provided on both sides of the upper mold body, and a slot is provided on one side of the lifting block. The slot on one side of the lifting block is aligned with the flow channel through the sliding fit of the lifting block. The lifting block has a hollow internal structure, and an oblique micro-hole is provided at one bottom end of the lifting block, with the oblique micro-hole facing the bottom of the upper mold core.

[0028] By setting lifting blocks on both sides of the upper mold body and utilizing their internal hollow structure and bottom oblique micro-holes, precise lubrication of lubricating oil is achieved. The alignment and cooperation of the hole groove and the flow groove ensure smooth flow of lubricating oil. The design of the oblique micro-holes facing the bottom of the upper mold core further optimizes the lubrication effect, effectively reduces friction during the stamping process, improves demolding efficiency and mold life, and reduces the risk of surface damage to parts, thereby improving production efficiency and product quality. When the lifting blocks retract upward, the channel and the connecting groove on the outer wall of the upper mold body are misaligned, thus achieving closure.

[0029] Preferably, the top of the lifting block is connected to the bottom of the slide rod, the outer wall of the slide rod slides in contact with the inner ends of the upper mold body, and a second return spring is fitted on the outside of the slide rod;

[0030] By connecting the lifting block and the sliding rod, and through the sliding engagement between the sliding rod and the interior of the upper die body, the stable lifting movement of the lifting block is achieved. The second return spring provides an automatic reset function for the lifting block, ensuring that it can return to its initial position in a timely manner during stamping and demolding, thus avoiding interference with the normal operation of the die. This structure not only improves the automation level and operating efficiency of the die, but also enhances its stability and reliability, further optimizing the overall performance of the stamping die.

[0031] Preferably, the bottom of the upper mold body is provided with a groove, the upper mold core is embedded in the groove at the bottom of the upper mold base, and set bolts are provided on both sides of the upper mold base. The set bolts are threadedly connected to the inside of the upper mold base, and one end of the set bolt is inserted into the inside of the upper mold core.

[0032] By creating a groove at the bottom of the upper die body and embedding the upper die core therein, and utilizing the threaded connection between the set bolt and the upper die base, as well as its structure that penetrates into the upper die core, a stable installation and quick replacement of the upper die core are achieved. The groove provides precise positioning for the upper die core, ensuring accurate matching between the upper and lower die cores during stamping. The set bolt provides reliable fixing force, preventing the upper die core from loosening during stamping. Furthermore, when replacement is needed, it can be quickly disassembled simply by loosening the bolt. This structure not only improves the stamping accuracy and stability of the die but also significantly reduces maintenance time and labor intensity, enhancing the practicality and economy of the die.

[0033] This invention provides a combined stamping die for casting automotive parts. It has the following advantages:

[0034] In this combined stamping die for casting automotive parts, the replacement of the lower die core is achieved by moving a cam wrench to loosen the limiting component. Under the elastic action of the limiting spring, the limiting plate is pushed and disengaged from the latch, while the bottom of the limiting plate moves to above the end of the base plate. When the upper die base moves upward under external power, the guide column rises accordingly, which in turn pulls the base plate upward. The upward movement of the base plate causes the limiting plate and support plate to rise synchronously, and finally, the lower die core is ejected from the lower die body through the support plate, achieving quick and convenient disassembly of the lower die core.

[0035] It effectively solves the problem that the lower mold core is difficult to remove in traditional embedded molds due to its tight fit with the mold base, reduces the time and labor intensity required to replace the lower mold core, and reduces the reliance on professional tools and highly skilled operators;

[0036] In addition, this structural design ensures the stability and reliability of the mold when the mold core is frequently changed, avoids the risk of mold damage caused by the complex disassembly process, extends the service life of the mold, and reduces production costs. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0038] Figure 2 This is a front view structural diagram of the present invention;

[0039] Figure 3 This is a schematic cross-sectional view of the present invention;

[0040] Figure 4 This is a schematic diagram of the upper mold core structure of the present invention;

[0041] Figure 5 This is a schematic diagram of the main structure of the lower mold of the present invention;

[0042] Figure 6This is a schematic diagram of the lower mold core structure of the present invention;

[0043] Figure 7 This is a schematic diagram of the limiting plate structure of the present invention;

[0044] Figure 8 This is a schematic diagram of the main structure of the upper mold of the present invention;

[0045] Figure 9 This is a schematic diagram of the support plate structure of the present invention;

[0046] Figure 10 This is a schematic diagram of the limiting block structure of the present invention.

[0047] In the diagram, 1. Lower mold base; 101. Lower mold body; 102. Cam wrench; 103. Adjusting bolt; 104. Sleeve; 105. Slider; 106. Limiting plate; 107. Base plate; 108. Ejector plate; 109. Limiting post; 110. First return spring; 111. Buckle; 112. Support plate; 113. Guide seat; 114. Insert groove; 115. Positioning hole; 116. Support platform 117. Limiting spring; 118. Push block; 2. Lower mold core; 3. Guide post; 301. Limiting block; 4. Upper mold base; 401. Movable block; 402. Piston groove; 403. Upper mold body; 404. Flow groove; 405. One-way valve core; 406. Lifting block; 407. Slide rod; 408. Second return spring; 409. Connecting hole; 410. Set bolt; 5. Top plate; 6. Upper mold core. Detailed Implementation

[0048] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0049] Example 1: Please refer to Figure 1-10 This invention provides a technical solution: a combined stamping die for casting automotive parts, comprising:

[0050] Lower mold base 1;

[0051] The lower mold core 2 is embedded inside the lower mold base 1;

[0052] Guide pillar 3 is internally connected to the lower mold base 1 and is used for mold guiding.

[0053] The upper mold base 4 is connected to one end of the guide post 3 and is located above the lower mold base 1;

[0054] Top plate 5 is connected to the top of upper mold base 4, and the four ends of top plate 5 are connected to guide pillars 3;

[0055] The upper die core 6 is embedded inside the upper die base 4 and is used to cooperate with the lower die core 2 to stamp automotive parts.

[0056] This modular stamping die for automotive parts casting features a highly innovative and practical design for the disassembly of the lower die core 2. By optimizing the fit between the lower die core 2 and the lower die base 1, it not only retains the high precision and stability advantages of embedded installation but also cleverly solves the problem of the difficulty in disassembling the lower die core 2 in traditional embedded dies. Specifically, this design ensures a tight fit and precise positioning between the lower die core 2 and the lower die base 1 during the stamping process. Through structural optimization, the lower die core 2 can be quickly and easily removed from the lower die base 1 when replacement is needed. This not only reduces the time and labor intensity required to replace the lower die core 2 but also avoids potential damage to the die caused by frequent disassembly. Furthermore, this convenient disassembly method reduces reliance on specialized tools and highly skilled operators, further enhancing the ease of use and versatility of the die.

[0057] Example 2: Please refer to Figure 1-10This invention provides a technical solution: a combined stamping die for casting automotive parts. The lower die base 1 includes a lower die body 101. Cam wrenches 102 are provided on both sides of the lower die body 101. One end of the cam wrench 102 is rotatably connected to one end of the adjusting bolt 103 via a shaft. The adjusting wrench is slidably connected to the lower die body 101, and one end of the adjusting wrench is threadedly connected to a sleeve 104. A slider 105 is fitted onto one end of the sleeve 104. The slider 105 is slidably connected to the inside of a limiting plate 106. A guide seat 113 is provided on the top of the lower mold body 101 for positioning the upper mold base 4; a vertical groove is provided inside the limiting plate 106, and the groove has a T-shaped cross-section. The slider 105 is located inside the vertical groove of the limiting plate 106. A transverse slot is provided on one side of the top of the limiting plate 106, and the slot is engaged with the buckle 111 through the sliding fit of the limiting plate 106. The buckle 111 is provided at both ends of the support plate 112. The support plate 112 is attached to the bottom of the lower mold core 2. The edge of the lower die body 101 contacts the top surface of the support platform 116, which is located on the inner wall surface of the lower die body 101. Two limiting plates 106 are provided, with one side of each limiting plate 106 slidingly contacting a push block 118. The push block 118 is located inside the insert groove 114, and slides against the inner wall of the insert groove 114. The insert groove 114 is formed on both inner walls of the lower die body 101, and a limiting spring 117 is provided inside the insert groove 114. A base plate 107 is provided between the two limiting plates 106. The limiting plate 106 is in contact with the top of both ends of the base plate 107 through a sliding fit. The top of the base plate 107 is provided with an ejector plate 108. The top of the ejector plate 108 is provided with a limiting post 109. The limiting post 109 is fitted with a first return spring 110. The top of the ejector plate 108 is fitted with an ejector pin for ejecting and demolding parts. The four ends of the base plate 107 are connected to the bottom of the guide post 3 by bolts. The guide post 3 slides in contact with the inner wall of the positioning hole 115. The positioning hole 115 is opened inside the lower mold body 101.

[0058] When replacing the lower mold core 2, since it is embedded inside the lower mold body 101 and has no good contact point with the lower mold body 101, it is not easy to remove. Therefore, by turning the cam wrench 102, the cam wrench 102 can be loosened. Then, under the push of the limit spring 117, the limit plate 106 can be moved, so that the top end of the limit plate 106 can be disengaged from the buckle 111. At the same time, the bottom end of the limit plate 106 will move above the end of the bottom plate 107. When the upper mold base 4 moves upward, it will drive the guide rod to move upward, and the guide rod will pull the bottom plate 107 to move upward. This will cause the bottom plate 107 to drive the limit plates 106 at both ends to move upward. When the limit plates 106 move upward, they will drive the support plate 112 to move upward, and the support plate 112 will drive the lower mold core 2 to move upward, so that the lower mold core 2 can be moved out of the lower mold body 101, making it easy to remove the lower mold core 2.

[0059] This modular stamping die for automotive parts casting significantly improves replacement efficiency and reduces labor intensity by optimizing the replacement method of the lower die core 2. It makes the removal of the lower die core 2 more convenient, avoids damage to the die caused by frequent disassembly, and also reduces the skill requirements for operators.

[0060] Example 3: Please refer to Figure 1-10 This invention provides a technical solution: a combined stamping die for casting automotive parts. A limit block 301 is fitted onto one end of the top of a guide post 3, and the limit block 301 is located on the top of an upper die base 4. The upper die base 4 includes a movable block 401, with a sealing ring fitted onto its outer wall. The outer wall of the movable block 401 slides in contact with the inner wall of a piston groove 402. A spring is installed inside the piston groove to push the movable block upwards to reset. The piston groove 402 communicates with a connecting hole 409 and a flow channel 404, respectively. The piston groove 402 is located inside the upper die body 403. A one-way valve core 405 is installed inside both the connecting hole 409 and the flow channel 404. Lifting blocks 406 are provided on both sides of the upper die body 403. A slot is provided on one side of the lifting block 406, and the slot on one side of the lifting block 406 is aligned with the flow channel 404 through the sliding fit of the lifting block 406. The lifting block 406 has a hollow structure inside, and an oblique micro-hole is opened at one end of the bottom of the lifting block 406, with the oblique micro-hole facing the bottom of the upper mold core 6. The top of the lifting block 406 is connected to the bottom of the slide rod 407, and the outer wall of the slide rod 407 slides in contact with the inner ends of the upper mold body 403. A second return spring 408 is fitted on the outside of the slide rod 407. A groove is opened at the bottom of the upper mold body 403, and the upper mold core 6 is embedded in the groove at the bottom of the upper mold base 4. Set bolts 410 are provided on both sides of the upper mold base 4. The set bolts 410 are threadedly connected to the inside of the upper mold base 4, and one end of the set bolts 410 is inserted into the inside of the upper mold core 6.

[0061] An external hydraulic cylinder drives the top plate 5 to move upward, which in turn drives the upper mold base 4 to move upward. The four ends of the upper mold base 4 move upward along the guide pillars 3. When it reaches the top of the guide pillar 3, it is restricted by the top limit block 301 of the guide pillar 3. The movable block 401 is squeezed into the piston groove 402, which in turn squeezes the lubricating oil inside the piston groove 402. The lubricating oil inside the piston groove 402 is squeezed and can enter the flow groove 404. Then, it enters the lifting block 406 through the one-way valve core 405 inside the flow groove 404. Subsequently, it is sprayed onto the bottom of the upper mold core 6 through the inclined micro-holes at the bottom of the lifting block 406, so that the bottom can be lubricated by spraying oil, which helps to maintain a good demolding effect. As the top plate 5 continues to move upward, the guide pillar 3 will be driven to move upward, and the guide pillar 3 will drive the bottom plate 107 to move upward synchronously. As the base plate 107 moves upward, it will simultaneously drive the top ejector plate 108 to move upward, so that it can be ejected upward by the ejector pins when the mold is demolded, thus facilitating the demolding of automotive parts from the lower mold core 2. When the top plate 5 drives the upper mold base 4 to move downward for stamping, the bottom of the lifting block 406 will contact the lower mold base 1, thereby allowing the lifting block 406 to retract upward and compress the second return spring 408, thus preventing the lifting block 406 from interfering with the mold closing of the upper mold base 4 and the lower mold base 1. At the same time, as the upper mold base 4 moves downward, the movable block 401 will disengage from the bottom of the limit block 301. Under the action of the spring inside the piston groove 402, the movable block 401 will be pushed upward, and the connecting hole 409 will generate suction. By connecting the connecting hole 409 to the external oil supply hose, the lubricating oil inside the piston groove 402 will be automatically compensated.

[0062] This stamping die achieves efficient demolding and lubrication through hydraulic drive and an automatic oil spraying lubrication system. The advantages of oil spraying lubrication are that it can reduce friction, improve demolding effect, extend die life, reduce manual intervention, and ensure uniform lubrication. It can effectively solve various problems caused by friction during the stamping process, ensure the smooth progress of the stamping process, reduce surface damage to parts and die wear, and improve production efficiency and product quality.

[0063] The overall workflow of this combined stamping die for automotive parts casting is as follows: First, the external hydraulic cylinder drives the top plate 5 to move upward, and the rise of the top plate 5 drives the upper die base 4 to move upward along the guide post 3. When the upper die base 4 moves to the top of the guide post 3, it is restricted by the limit block 301, and the movable block 401 is squeezed into the piston groove 402, squeezing the lubricating oil in the piston groove 402, so that it flows into the lifting block 406 through the one-way valve core 405, and is sprayed onto the bottom of the upper die core 6 through the inclined micro-hole at the bottom of the lifting block 406, realizing automatic lubrication and ensuring good demolding effect. As the top plate 5 continues to rise, the guide post 3 drives the bottom plate 107 to move upward synchronously, and the bottom plate 107 drives the ejector plate 108 to rise. The ejector pins on the ejector plate 108 push upward, making it easy for the automotive parts to be demolded from the lower die core 2. When the top plate 5 moves the upper mold base 4 downwards for stamping, the bottom of the lifting block 406 contacts the lower mold base 1, causing the lifting block 406 to retract upwards and compress the second return spring 408, preventing the lifting block 406 from interfering with the mold closing of the upper mold base 4 and the lower mold base 1. At the same time, the movable block 401 disengages from the bottom contact of the limit block 301 and resets under the action of the spring in the piston groove 402, pushing the movable block 401 upwards and causing the connecting hole 409 to generate suction. By connecting the connecting hole 409 to the external oil supply hose, automatic compensation of the lubricating oil in the piston groove 402 is achieved.

[0064] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the scope of the invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0065] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A combined stamping die for casting automotive parts, characterized in that, include: Lower mold base (1); The lower mold core (2) is embedded inside the lower mold base (1); The guide post (3) is internally connected to the lower mold base (1); The upper mold base (4) is connected to one end of the top of the guide post (3) and is located above the lower mold base (1); The top plate (5) is connected to the top of the upper mold base (4), and the four ends of the top plate (5) are connected to the guide post (3); The upper mold core (6) is embedded inside the upper mold base (4) and is used to cooperate with the lower mold core (2) to stamp automotive parts. The lower mold base (1) includes a lower mold body (101), and cam wrenches (102) are provided on both sides of the lower mold body (101). The cam wrenches (102) are slidably connected to the lower mold body (101), and one end of the cam wrench (102) is threadedly connected to the sleeve (104). A slider (105) is fitted on one end of the sleeve (104). The slider (105) is slidably connected to the inside of the limiting plate (106). A guide seat (113) is provided on the top of the lower mold body (101) for positioning the upper mold base (4). The limiting plate (106) has a vertical groove inside, and the groove has a T-shaped cross-section. The slider (105) is located inside the vertical groove of the limiting plate (106). A horizontal slot is provided on one side of the top of the limiting plate (106), and the slot can be engaged with the buckle (111) by sliding the limiting plate (106). The buckle (111) is provided at both ends of the support plate (112). The support plate (112) is attached to the bottom of the lower mold core (2). The bottom edge of the support plate (112) is in contact with the top surface of the support platform (116). The support platform (116) is located on the inner wall surface of the lower mold body (101). Two limiting plates (106) are provided. One side of each limiting plate (106) is in sliding contact with a push block (118). The push block (118) is located inside the insert groove (114). The push block (118) is in sliding contact with the inner wall of the insert groove (114). The insert groove (114) is opened on both sides of the inner wall of the lower mold body (101). A limiting spring (117) is provided inside the insert groove (114). The elastic force of the limiting spring (117) can push the push block (118), thereby pushing the limiting plate (106) to move. A base plate (107) is provided between the two limiting plates (106). The limiting plates (106) can slide to contact the top of both ends of the base plate (107). An ejector plate (108) is provided on the top of the base plate (107). A limiting post (109) is provided on the top of the ejector plate (108). A first reset spring (110) is fitted on the outside of the limiting post (109). An ejector pin is embedded on the top of the ejector plate (108) for ejecting and demolding parts. The four ends of the base plate (107) are connected to the bottom of the guide post (3) by bolts. The guide post (3) slides in contact with the inner wall of the positioning hole (115). The positioning hole (115) is opened inside the lower mold body (101). The first reset spring (110) provides automatic reset capability for the ejector plate (108).

2. The combined stamping die for casting automotive parts according to claim 1, characterized in that: The guide post (3) has a limit block (301) fitted at one end of its top, and the limit block (301) is located at the top of the upper mold base (4). The upper mold base (4) includes a movable block (401), and a sealing ring is fitted on the outer wall of the movable block (401). The outer wall of the movable block (401) slides in contact with the inner wall of the piston groove (402). The piston groove (402) is connected to the connecting hole (409) and the flow groove (404) respectively. The upper mold base (4) also includes an upper mold body (403). The piston groove (402) is opened inside the upper mold body (403). A one-way valve core (405) is provided inside both the connecting hole (409) and the flow groove (404). The connecting hole (409) is connected to the external oil supply hose.

3. The combined stamping die for casting automotive parts according to claim 2, characterized in that: The upper mold body (403) is provided with lifting blocks (406) on both sides. The lifting block (406) has a hole groove on one side. The hole groove on one side of the lifting block (406) can be aligned with the flow groove (404) by sliding the lifting block (406). The lifting block (406) has a hollow structure inside. The bottom end of the lifting block (406) is provided with an oblique micro hole, and the oblique micro hole faces the bottom of the upper mold core (6).

4. The combined stamping die for casting automotive parts according to claim 3, characterized in that: The top of the lifting block (406) is connected to the bottom of the slide rod (407). The outer wall of the slide rod (407) slides in contact with the inner ends of the upper mold body (403). A second return spring (408) is fitted on the outside of the slide rod (407), so that the lifting block (406) can retract upward and compress the second return spring (408), thereby avoiding the lifting block (406) from interfering with the mold closing of the upper mold base (4) and the lower mold base (1).

5. The combined stamping die for casting automotive parts according to claim 4, characterized in that: The bottom of the upper mold body (403) is provided with a groove, the upper mold core (6) is embedded in the groove at the bottom of the upper mold base (4), and the upper mold base (4) is provided with set bolts (410) on both sides. The set bolts (410) are threadedly connected to the inside of the upper mold base (4), and one end of the set bolts (410) is inserted into the inside of the upper mold core (6).

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