A die-casting mold

Abstract

The utility model relates to the field of die casting process technology provides a kind of die casting mould, comprising: fixed mould component, movable mould component, core, driving part, trigger and travel switch.The moving plate on movable mould component and fixed mould component abut to form product cavity, and at least part of core extends into product cavity to form internal structure of casting.After opening mould, driving part drives moving plate to move relative to core, realizes that casting and core are automatically de-coring;Meanwhile, trigger on moving plate moves synchronously with moving plate, when moving plate moves to preset position, trigger and travel switch contact, and feedback moving plate in-place signal.Through the linkage of trigger and travel switch, the real-time monitoring of core-pulling stroke is realized, to ensure that action is executed in place, avoid casting jam, strain or mould damage, improve the degree of automation, security and production stability of die casting process.

Description

Technical Field

[0001] This utility model belongs to the field of die casting technology, and specifically relates to a die casting mold. Background Technology

[0002] In die casting, for metal castings with internal cavities, side holes, or complex internal structures, a core is usually required in the mold to achieve the forming and demolding of the internal structure of the casting. After the casting is formed, a core-pulling action is required, that is, removing the core from inside the casting.

[0003] In existing technologies, some die-casting molds use drive components to directly or indirectly drive the core for core-pulling. However, in actual operation, due to the lack of precise control and feedback mechanisms for the stroke of moving parts, the following problems are prone to occur:

[0004] First, because it's impossible to accurately determine whether the core-pulling action is complete, the next step may be performed before the core is fully withdrawn from the casting, leading to problems such as casting jamming, scratches, cracks, or even mold damage. Second, existing die-casting mold structures cannot provide real-time feedback on whether moving parts have reached the predetermined position, resulting in low automation and hindering reliable interlocking control with the control system. Utility Model Content

[0005] To address the aforementioned shortcomings of existing technologies, this invention aims to solve the following technical problem: It proposes a die-casting mold by incorporating a moving plate driven by a drive component within the moving mold assembly, and linking it with a trigger component and a limit switch to form a linkage feedback mechanism between mechanical motion and electrical signals. This enables real-time position monitoring of the core-pulling action. Based on the signals from the limit switches, the control system can accurately determine whether the core-pulling operation has been completed, effectively preventing further actions before the core-pulling is finished, thus preventing problems such as casting jamming, scratches, cracks, and even mold damage. Simultaneously, it improves the automation level and operational safety of the die-casting process.

[0006] The technical solution adopted by this utility model to solve its technical problem is to propose a die-casting mold, comprising:

[0007] Fixed mold assembly;

[0008] A moving mold assembly is provided with a movable plate and a core. The movable plate movably abuts against the fixed mold assembly to form a product cavity. One end of the core is connected to the moving mold assembly, and the other end movably passes through the movable plate and is at least partially inserted into the product cavity for forming the internal structure of the casting.

[0009] A driving component is disposed on the moving mold assembly, and the output end of the driving component is connected to the moving plate;

[0010] When the die-casting mold is opened, the driving component drives the moving plate to move relative to the core, thereby causing the formed casting to separate from the core;

[0011] A trigger element, one end of which is connected to the movable plate and moves with the movable plate;

[0012] A limit switch is disposed on the moving mold assembly;

[0013] When the driving component moves the movable plate to a preset position, the trigger component contacts the limit switch to provide a limit for the movable plate.

[0014] In one of the die-casting molds described above, the trigger has a rod-shaped structure, one end of which is threaded to the movable plate.

[0015] In one of the die-casting molds described above, the trigger element also has an abutment portion, which is fixed to the rod-shaped structure and makes movable contact with the contacts of the limit switch.

[0016] In one of the die-casting molds described above, a support plate is provided on the moving mold assembly, and the driving component is fixed on the support plate.

[0017] In the aforementioned die-casting mold, a hollow portion is provided between the moving plate and the support plate, and the driving component is located at the opening end of the hollow portion and exposed outside the moving mold assembly.

[0018] In the aforementioned die-casting mold, the support plate is further provided with a clearance groove. One end of the rod-shaped structure of the trigger is connected to the moving plate, and the other end passes through the hollow part and extends into the clearance groove. The abutment part is located at the opening end of the hollow part and exposed on the outside of the moving mold assembly. The limit switch is provided on the outer wall of the moving mold assembly, and the contact of the limit switch is located on the moving path of the abutment part.

[0019] In the aforementioned die-casting mold, the moving mold assembly is provided with two limit switches arranged opposite to each other. The two limit switches are respectively located at both ends of the moving path of the abutment part, and are used to trigger when the abutment part moves to the corresponding position.

[0020] In one of the die-casting molds described above, a drive block is provided at the output end of the drive component, and the drive block is connected to the movable plate.

[0021] In the aforementioned die-casting mold, the drive block has outwardly extending protrusions on both sides, the moving plate is provided with a T-shaped groove, the drive block is inserted into the T-shaped groove, and the protrusions are engaged in the lateral width of the T-shaped groove.

[0022] In one of the die-casting molds described above, the driving component is a hydraulic cylinder.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] (1) By setting a moving plate driven by a drive component in the moving mold assembly, and linking it with a trigger and a limit switch, a linkage feedback mechanism between mechanical motion and electrical signals is formed, realizing real-time position monitoring of the core pulling action. Based on the signal sent by the limit switch, the control system can accurately determine whether the core pulling has been completed, thereby effectively avoiding the next action before the core pulling is completed, preventing problems such as casting jamming, scratching, cracking, or even mold damage. At the same time, it improves the automation level and operational safety of the die casting process.

[0025] (2) The limit switch is externally mounted on the outer wall of the moving mold assembly, away from high temperature, high pressure and easily contaminated cavity areas. This significantly reduces the impact of heat radiation, metal flash and hydraulic oil on the sensor, improving its working stability and service life. The exposed structure facilitates electrical connection, status observation, fault diagnosis and later replacement, enhancing the maintainability of the equipment. In addition, the relative position of the limit switch and the contact part of the trigger element is clearly visible, which is conducive to intuitive adjustment of the trigger timing during equipment debugging, optimizing the stroke matching and control accuracy.

[0026] (3) Two limit switches are set up in opposite directions to detect the two extreme positions of the moving plate: "core extension in place" and "reset in place". This realizes the full closed-loop control of the bidirectional movement of the moving plate. This design not only ensures that the core pulling and return actions can be reliably terminated, but also prevents mechanical jamming or damage to the actuator caused by the over-travel of the drive component, further improving the reliability and long-term stability of the mold operation. Attached Figure Description

[0027] Figure 1 This is a 3D view of the proposed solution.

[0028] Figure 2 This is the floor plan of this project.

[0029] Figure 3 yes Figure 2 Sectional view of AA.

[0030] Figure 4 This is a 3D view of the hidden fixed mold components in this solution.

[0031] Figure 5 yes Figure 4 A 3D view of the hidden part of the structure.

[0032] In the diagram, 100 is the fixed mold assembly; 200 is the moving mold assembly; 300 is the moving plate; 310 is the T-slot; 400 is the core; 500 is the driving component; 510 is the driving block; 511 is the protrusion; 600 is the trigger component; 610 is the rod-shaped structure; 620 is the abutment part; 700 is the limit switch; 800 is the support plate; 810 is the clearance groove; and 900 is the hollow part. Detailed Implementation

[0033] 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.

[0034] 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.

[0035] like Figures 1 to 5 As shown, this solution provides a die-casting mold, comprising: a fixed mold assembly 100; a movable mold assembly 200, on which a movable plate 300 and a core 400 are disposed, the movable plate 300 and the fixed mold assembly 100 movably abutting against each other to form a product cavity, one end of the core 400 being connected to the movable mold assembly 200, and the other end being movably inserted through the movable plate 300 and at least partially inserted into the product cavity for forming the internal structure of the casting; a driving member 500, disposed on the movable mold assembly 200, and the output end of the driving member 500 being connected to the movable plate 300; a trigger member 600, one end of which is connected to the movable plate 300 and moves with the movable plate 300; and a limit switch 700, disposed on the movable mold assembly 200, the trigger member 600 contacting the limit switch 700 for providing a limit for the movable plate 300.

[0036] The working process of the die-casting mold in this solution is as follows:

[0037] During the mold closing stage, the die casting machine drives the moving mold assembly 200 to approach the fixed mold assembly 100. The moving plate 300 is driven by the moving mold assembly 200 to fit tightly with the fixed mold assembly 100 to form the product cavity. The core 400 extends into the product cavity to form a complete casting space.

[0038] In the die casting stage, molten metal is injected into the mold cavity at high speed and cooled and solidified under high pressure to form a casting.

[0039] During the mold opening and core pulling stage, the die-casting machine drives the moving mold assembly 200 to retract relative to the fixed mold assembly 100. Due to the clamping force, the formed casting remains on the moving plate 300 on the moving mold side, separating from the fixed mold assembly 100. Subsequently, the drive component 500 is activated, pushing the moving plate 300 to move along a preset direction. At this time, the formed casting, driven by the moving plate 300, detaches axially along the core 400, completing the core pulling action. During this process, the trigger component 600 connected to the moving plate 300 moves synchronously. When the moving plate 300 moves to a preset position, the trigger component 600 contacts the limit switch 700, and the limit switch 700 sends an electrical signal. This signal is transmitted to the die-casting mold control system or the die-casting machine PLC in this solution to confirm that the core pulling action between the core 400 and the finished casting has been completed, and can serve as the starting condition for the next action, realizing automated interlocking control.

[0040] This invention establishes a linkage feedback mechanism between mechanical motion and electrical signals by incorporating a moving plate 300 driven by a drive component 500 within the moving mold assembly 200, and linking it with a trigger component 600 and a limit switch 700. This enables real-time position monitoring of the core-pulling action of the core 400. Based on the signal from the limit switch 700, the control system can accurately determine whether the core-pulling operation has been completed, effectively preventing further actions before the core-pulling is finished, thus preventing problems such as casting jamming, scratches, cracking, or even mold damage. Simultaneously, it improves the automation level and operational safety of the die-casting process.

[0041] More preferably, the trigger 600 has a rod-shaped structure 610, one end of which is threaded to the movable plate 300. The trigger 600 with the rod-shaped structure 610 is installed on the movable plate 300 by a threaded connection, which is simple in structure, easy to install, and has a firm and reliable connection; the threaded connection method facilitates disassembly and replacement, which is beneficial for later maintenance.

[0042] More preferably, the trigger 600 is provided with an abutment portion 620, which is fixed on the rod-shaped structure 610 and abuts against the limit switch 700 as the moving plate 300 moves. By providing a dedicated abutment portion 620 on the rod-shaped structure 610, the contact stability between the trigger 600 and the limit switch 700 is enhanced, avoiding false triggering or poor contact due to the rod being too thin or having an irregular surface. The abutment portion 620 can be designed as a boss structure, which makes it easier to accurately trigger the limit switch 700, improves the reliability of signal feedback, thereby ensuring the accuracy of the control system in judging the position of the moving plate 300, and improving the safety and repeatability of mold operation.

[0043] More preferably, the moving mold assembly 200 is provided with a support plate 800, and the driving component 500 is fixed on the support plate 800. By providing the support plate 800 to fix the driving component 500, the rigidity and stability of the driving component 500 installation are improved.

[0044] More preferably, a cutout 900 is provided between the moving plate 300 and the support plate 800, and the driving component 500 is located at the open end of the cutout 900 and exposed to the outside of the moving mold assembly 200. This arrangement facilitates the dissipation of heat from the driving component 500 during operation through convection and radiation, reducing local temperature rise and preventing performance degradation or malfunctions caused by heat accumulation, thereby improving the operational stability of the equipment under continuous operating conditions.

[0045] More preferably, the support plate 800 is also provided with a relief groove 810, one end of the rod-shaped structure 610 of the trigger 600 is connected to the moving plate 300, and the other end passes through the hollow part 900 and extends into the relief groove 810. The abutment part 620 is located at the opening end of the hollow part 900 and exposed on the outside of the moving mold assembly 200. The limit switch 700 is provided on the outer wall of the moving mold assembly 200, and the contact of the limit switch 700 is located on the moving path of the abutment part 620.

[0046] An obstacle avoidance groove 810 is provided on the support plate 800, which allows the trigger 600 to pass smoothly through the area of ​​the support plate 800 during movement, effectively avoiding mechanical interference problems caused by the dense structural layout. The obstacle avoidance groove 810 also has a certain guiding and limiting function for the trigger 600, which helps to maintain the stability of its movement trajectory, reduce shaking or deflection, and thus improve the repeatability of the triggering action. This design achieves the coordinated movement of multiple parts without sacrificing the strength of the support plate 800, enhancing the stability and safety of mold operation.

[0047] The limit switch 700 is externally mounted, away from the high-temperature and high-pressure product cavity area, effectively improving its resistance to contamination and electromagnetic interference. Simultaneously, the exposed arrangement facilitates electrical wiring, status observation, and subsequent maintenance and replacement, significantly improving the maintainability and operational reliability of the equipment. Furthermore, the relative position of the limit switch 700 and the contact part 620 is clearly visible, allowing for intuitive judgment of the triggering timing and travel matching relationship during equipment commissioning, thus optimizing control parameters.

[0048] More preferably, the moving mold assembly 200 is provided with two limit switches 700 arranged opposite to each other. The two limit switches 700 are respectively located at both ends of the moving path of the abutment part 620 and are used to trigger when the abutment part 620 moves to the corresponding position.

[0049] By setting two oppositely arranged limit switches 700, the "extended to the limit" and "reset to the limit" extreme positions of the moving plate 300 are detected respectively, realizing bidirectional full closed-loop control of the stroke and ensuring that the core pulling and return actions can be accurately terminated; the two ends of the abutment part 620 trigger the corresponding limit switches 700 respectively, reducing the use of additional triggering elements and making the structure simple and efficient; this design effectively prevents equipment damage or jamming caused by the over-travel operation of the drive component 500, and improves the safety, automation level and process stability of mold operation.

[0050] More preferably, the output end of the drive unit 500 is provided with a drive block 510, which is connected to the movable plate 300.

[0051] In order to connect the drive block 510 to the moving plate 300, the drive block 510 has outwardly extending protrusions 511 on both sides. The moving plate 300 is provided with a T-shaped groove 310. The drive block 510 is inserted into the T-shaped groove 310, and the protrusions 511 are engaged in the lateral width of the T-shaped groove 310.

[0052] The structure employing a T-slot 310 and a drive block 510 with a protrusion 511 enables rapid positioning and secure engagement between the drive block 510 and the moving plate 300, allowing assembly to be completed without additional fasteners and simplifying the installation process. The T-slot 310 structure effectively restricts the circumferential rotation and detachment of the drive block 510, ensuring coaxiality and stability during transmission. This connection method has good vibration resistance and load-bearing capacity, making it suitable for high-frequency, high-load die-casting operations, and significantly improving connection reliability and service life.

[0053] More preferably, the driving component 500 is a hydraulic cylinder. Using a hydraulic cylinder as the driving component 500 offers advantages such as high output force, smooth operation, fast response speed, and high control precision, making it particularly suitable for applications requiring large demolding forces in die-casting molds. The hydraulic cylinder can operate stably in harsh environments such as high temperature and high humidity, demonstrating strong adaptability. Furthermore, it is easy to integrate with existing hydraulic systems, facilitating automated control and reducing energy consumption and maintenance costs. Using a hydraulic cylinder to drive the moving plate 300 to achieve automatic core removal significantly improves production efficiency and product consistency.

[0054] 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.

[0055] 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.

[0056] 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 die-casting mold, characterized in that, include: Fixed mold assembly; A moving mold assembly is provided with a movable plate and a core. The movable plate movably abuts against the fixed mold assembly to form a product cavity. One end of the core is connected to the moving mold assembly, and the other end movably passes through the movable plate and is at least partially inserted into the product cavity for forming the internal structure of the casting. A driving component is disposed on the moving mold assembly, and the output end of the driving component is connected to the moving plate; When the die-casting mold is opened, the driving component drives the moving plate to move relative to the core, thereby causing the formed casting to separate from the core; A trigger element, one end of which is connected to the movable plate and moves with the movable plate; A limit switch is disposed on the moving mold assembly; When the driving component moves the movable plate to a preset position, the trigger component contacts the limit switch to provide a limit for the movable plate.

2. The die-casting mold as described in claim 1, characterized in that, The trigger has a rod-shaped structure, one end of which is threaded to the movable plate.

3. The die-casting mold as described in claim 2, characterized in that, The trigger also has an abutment portion, which is fixed on the rod-shaped structure and makes movable contact with the contacts of the limit switch.

4. The die-casting mold as described in claim 3, characterized in that, The moving mold assembly is provided with a support plate, and the driving component is fixed on the support plate.

5. The die-casting mold as described in claim 4, characterized in that, There is a cutout between the moving plate and the supporting plate, and the driving component is located at the opening end of the cutout and exposed on the outside of the moving mold assembly.

6. The die-casting mold as described in claim 5, characterized in that, The support plate is also provided with a clearance groove. One end of the rod-shaped structure of the trigger is connected to the moving plate, and the other end passes through the hollow part and extends into the clearance groove. The abutting part is located at the opening end of the hollow part and exposed on the outside of the moving mold assembly. The limit switch is provided on the outer wall of the moving mold assembly, and the contact of the limit switch is located on the moving path of the abutting part.

7. The die-casting mold as described in claim 3, characterized in that, The moving part assembly is provided with two limit switches arranged opposite each other. The two limit switches are respectively located at both ends of the moving path of the abutment part, and are used to trigger when the abutment part moves to the corresponding position.

8. The die-casting mold as described in claim 1, characterized in that, The output end of the driving component is provided with a driving block, and the driving block is connected to the moving plate.

9. A die-casting mold as described in claim 8, characterized in that, The drive block has outwardly extending protrusions on both sides, and a T-shaped groove is provided on the moving plate. The drive block is inserted into the T-shaped groove, and the protrusions are engaged in the lateral width of the T-shaped groove.

10. A die-casting mold as described in claim 1, characterized in that, The driving component is a hydraulic cylinder.

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