A four-slider radial synchronous sliding die structure with replaceable core

Abstract

The application belongs to the technical field of die-casting moulds, and particularly relates to a four-sliding-block radial synchronous sliding die-casting mould structure with replaceable mould cores, which comprises a fixed mould, the upper end of the fixed mould is symmetrically provided with a sliding groove, the upper end of the fixed mould is slidably connected with an adjusting mechanism, one side of the upper end of the fixed mould is provided with an industrial camera, and the lower part of the fixed mould is provided with a rotating disc. The die-casting mould structure is provided with a linkage mechanism composed of an arc-shaped groove rotating disc, a connecting rod and a sliding block, cooperates with a spatial coordinate coupling calculation module of the industrial camera and the controller, realizes visual automatic positioning and mechanical accurate clamping during the replacement of the mould core, can accurately calculate the radial expansion and contraction amount of the four sliding blocks under different rotation angles by using a displacement formula, successfully offsets the mechanical assembly tolerance by combining with a stroke correction coefficient, makes the four sliding blocks reach a very high concentricity before mould closing, greatly shortens the time for manual mould replacement and manual centering, and improves the mould replacement efficiency of the production line.

Description

Technical Field

[0001] This invention relates to the field of die casting mold technology, and in particular to a four-slider radial synchronous sliding die casting mold structure with quick mold core replacement. Background Technology

[0002] In die casting, the extremely high flow rate and impact pressure of molten metal during the filling stage often cause the mold parting surface to open instantaneously, creating extremely small gaps. The high-pressure molten metal solidifies upon entering these gaps, forming "flash" (burrs) on the die casting surface. Flash not only severely affects the dimensional accuracy and appearance of the casting, but also requires significant manual grinding and cleaning, and can even accelerate wear on the mold parting surface, greatly shortening mold life. Traditional die casting molds are mostly purely mechanically fastened structures, unable to provide any real-time compensation for the dynamic impact force during die casting. Therefore, frequent machine shutdowns for grinding the parting surface are necessary, resulting in extremely low production efficiency. The key to solving the die casting flash problem lies in how to actively enhance the clamping force during the filling process using intelligent methods.

[0003] To address the above problems, this invention proposes a four-slider radial synchronous sliding die-casting mold structure with quick mold core replacement. Summary of the Invention

[0004] To address the technical problem of flash forming on die-cast parts due to liquid metal impact, this invention proposes a four-slider radial synchronous sliding die-casting mold structure with quick mold core replacement.

[0005] This invention proposes a four-slider radial synchronous sliding die-casting mold structure with quick mold core replacement, including a fixed mold. The upper end of the fixed mold has axially symmetrically opened sliding grooves. An adjustment mechanism is slidably connected to the upper end of the fixed mold. An industrial camera is set on one side of the upper end of the fixed mold. A turntable is set below the fixed mold. A motor is set at the center of the lower surface of the turntable. An air inlet is opened on one side of the center of the lower surface of the turntable. An air inlet pipe is fixedly connected to the lower end of the air inlet. The upper end of the air inlet extends to the inner wall of a buffer cavity opened at the center of the upper surface of the fixed mold. A controller is set on one side of the fixed mold.

[0006] The adjustment mechanism is designed to facilitate quick and easy replacement of die-cast parts of different models.

[0007] Preferably, the adjusting mechanism includes a slider, which is slidably connected to the inner wall of an arc-shaped groove on the surface of the turntable via a connecting rod passing through the slide groove. T-shaped grooves are formed on both adjacent sides of the slider. A top block is provided between two adjacent sliders. A hydraulic cylinder is provided on the outer side of the top block. The surface of the hydraulic cylinder is fixedly connected to the surface of the fixed mold. A circular sliding plate is slidably connected to the inner wall of the T-shaped groove. A telescopic rod is rotatably connected to one end of the sliding plate. One end of the telescopic rod is rotatably connected to the side of the top block.

[0008] Preferably, a hydraulic telescopic rod is embedded inside the top block, and a locking block is fixedly connected to the outer end of the hydraulic telescopic rod. A clamping block is slidably engaged on the surface of the locking block, and the clamping block is used to detachably clamp different types of mold cores.

[0009] Preferably, the upper end of the inner wall of the buffer cavity is provided with air holes extending to the upper surface of the fixed mold. A die-casting base is slidably inserted into the inner wall of the air holes. The lower end of the die-casting base is provided with column feet in a rectangular array. The surface of the column feet is slidably inserted into the inner wall of the air holes. The air holes are arranged at an angle. The upper end of the air holes is opened along the upper surface of the fixed mold.

[0010] Preferably, the controller has a built-in spatial coordinate coupling calculation module for synchronous positioning of four sliders; when the motor drives the turntable to rotate, the controller's calculation unit calculates the precise radial displacement of the sliders according to the following formula. In the formula, The radius of curvature of the arc-shaped groove on the surface of the turntable is given by [reference to a specific parameter]. This refers to the real-time rotation angle of the motor. The stroke correction coefficient is set based on machining tolerances; the controller sends a high-precision pre-clamping signal to the hydraulic cylinder according to the calculation result, so that the four sliders reach a uniform initial spacing before mold closing.

[0011] Preferably, the controller is further configured with a die-casting punch back pressure calculation module, and the signal acquisition terminal of the controller is equipped with a sensor for real-time detection of the die-casting machine punch pressure or cavity pressure. When the molten metal is filling the mold at high speed, the controller calculates the pressure value fed back by the sensor. and the projected area of ​​the mold core Calculate the instantaneous reaction force generated by the molten metal on the parting surface of the mold using the following formula. The controller calculates the recoil force in real time. The clamping force of the hydraulic cylinder described above A comparison is made to determine whether there is a problem of flash caused by insufficient clamping force.

[0012] Preferably, the controller further includes a high-speed dynamic compensation and anti-flying edge control algorithm. The controller treats the molten metal filling process as an instantaneous momentum conversion process, and calculates the recoil force... When the force increases in a stepwise manner, the controller immediately provides the target dynamic clamping force according to the following formula. Compensation value: In the formula, The initial holding pressure set before the injection begins. The density of the molten metal, For the filling volume flow rate, The injection velocity of the punch. During the backflush action time in the filling stage, the controller rapidly increases the output pressure of the hydraulic cylinder at the instant the liquid metal contacts the mold, based on this target pressure, to forcibly eliminate the gap between the fixed mold and the slider, thus preventing flash from being generated at the source.

[0013] Preferably, the controller also incorporates a multi-stage injection segmented pressure variable parameter control algorithm. The controller divides the die-casting process into a slow filling segment, a high-speed filling segment, and a pressure-holding and shrinkage-compensating segment, and sets different basic clamping forces at different stages. When the system detects that it has entered the high-speed filling stage, the controller actively introduces a pressure overshoot. The control voltage of the proportional valve is output using the following pressure-time dynamic adjustment formula. In the formula, The reference voltage for the slow speed range of the proportional valve is given by k, where k is the filling response slope coefficient. To detect the moment when molten metal enters the mold cavity, where t is the current injection time, this algorithm enables the hydraulic cylinder to provide overshoot locking force in advance at the moment of filling, preventing the formation of mold opening gaps.

[0014] Preferably, the logic operation module of the controller includes a closed-loop PID control algorithm for the target clamping force. This algorithm reads the displacement and pressure sensor signals of the hydraulic cylinder in real time and calculates the target dynamic clamping force. Given a value, the proportional valve opening signal of the hydraulic cylinder is dynamically corrected using the following incremental PID control formula. Where e(k) is the deviation between the target clamping force and the actual clamping force at the k-th sampling time. These are the proportional, integral, and derivative adjustment coefficients, respectively, for dynamic adjustment based on the filling load.

[0015] Preferably, the clamping surface of the clamping block has a roughness range of [roughness range missing]. The micro-nano anti-slip texture is provided, and a metal-ceramic wear-resistant coating is provided on the texture surface. The parting surface where the fixed mold and the slider are combined is also provided with exhaust overflow grooves. Together with the anti-slip structure of the clamping block, it effectively disperses stress and further absorbs flash.

[0016] The beneficial effects of this invention are as follows:

[0017] 1. By setting up a linkage mechanism consisting of an arc-shaped groove turntable, connecting rod, and slider, and in conjunction with the spatial coordinate coupling and calculation module of the industrial camera and controller, visual automatic positioning and precise mechanical clamping are achieved during mold core replacement. The radial extension and retraction of the four sliders at different rotation angles can be accurately calculated using the displacement formula. Combined with the stroke correction coefficient, the mechanical assembly tolerance is successfully offset, so that the four sliders achieve extremely high concentricity before mold closing, which greatly shortens the time for manual mold replacement and manual centering and improves the mold replacement efficiency of the production line.

[0018] 2. By configuring a die-casting punch recoil force calculation module, a high-speed dynamic compensation and anti-flash control algorithm, and a multi-stage injection segmented pressure variable parameter control algorithm, the problem of traditional die-casting molds being unable to effectively cope with the high-speed filling impact of molten metal and easily generating flash is completely solved. The controller calculates the recoil force based on pressure and area, accurately predicting dangers; combined with the momentum compensation formula and S-type pressure overshoot formula, the hydraulic cylinder clamping force is dynamically increased at the millisecond level at the moment of filling, forcibly locking the parting surface. At the same time, combined with the incremental PID closed-loop algorithm for dynamic pressure holding, the channel for high-pressure molten metal overflow is fundamentally cut off, the generation of flash is eliminated, and the dimensional accuracy and pass rate of die-cast parts are greatly improved.

[0019] 3. By setting inclined air holes, a die-casting base, and a buffer cavity, and cooperating with high-pressure gas input through an external air inlet pipe, forced airflow is used to dissipate heat from the high-temperature mold core and base after die casting. The lateral blowing force of the high-pressure gas helps the die casting overcome demolding resistance, effectively preventing high-temperature sticking and improving the demolding success rate. At the same time, the high-roughness anti-slip texture on the surface of the clamping block, the metal-ceramic wear-resistant coating, and the exhaust overflow grooves around the parting surface not only enhance the clamping anti-slip ability but also further absorb and block minimal flash, effectively protecting the flatness of the mold parting surface and significantly extending the service life of the mold. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a four-slider radial synchronous sliding die-casting mold structure with quick mold core replacement proposed in this invention;

[0021] Figure 2 This is a perspective view of a four-slider radial synchronous sliding die-casting mold structure with quick mold core replacement proposed in this invention.

[0022] Figure 3 This is a diagram showing the position of the telescopic rod in a four-slider radial synchronous sliding die-casting mold structure with quick mold core replacement proposed in this invention.

[0023] Figure 4This is a front view of the top block of a four-slider radial synchronous sliding die-casting mold structure with quick mold core replacement proposed in this invention;

[0024] Figure 5 This is a sectional view of the fixed mold of a four-slider radial synchronous sliding die-casting mold structure with quick mold core replacement proposed in this invention.

[0025] Figure 6 This is a diagram showing the location of the buffer wall in a four-slider radial synchronous sliding die-casting mold structure with quick mold core replacement proposed in this invention.

[0026] In the diagram: 1. Fixed mold; 10. Slide groove; 11. Buffer cavity; 2. Adjustment mechanism; 21. Slider; 22. T-slot; 23. Top block; 24. Telescopic rod; 25. Slide plate; 26. Clamping block; 27. Hydraulic telescopic rod; 28. Locking block; 29. ​​Die-casting base; 210. Hydraulic cylinder; 3. Industrial camera; 4. Motor; 5. Turntable; 6. Air inlet pipe. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0028] Reference Figures 1-6 A four-slider radial synchronous sliding die-casting mold structure with quick mold core replacement includes a fixed mold 1. The upper end of the fixed mold 1 is symmetrically provided with a sliding groove 10. An adjustment mechanism 2 is slidably connected to the upper end of the fixed mold 1. An industrial camera 3 is provided on one side of the upper end of the fixed mold 1. A turntable 5 is provided below the fixed mold 1. A motor 4 is provided at the center of the lower surface of the turntable 5. An air inlet is provided on one side of the center of the lower surface of the turntable 5. An air inlet pipe 6 is fixedly connected to the lower end of the air inlet. The upper end of the air inlet extends to the inner wall of a buffer cavity 11 opened at the center of the upper surface of the fixed mold. A controller is provided on one side of the fixed mold 1.

[0029] The adjustment mechanism 2 is designed to facilitate quick and easy replacement of die-cast parts of different models.

[0030] In this embodiment, the adjustment mechanism 2 includes a slider 21. The slider 21 is slidably connected to the inner wall of the arc-shaped groove on the surface of the turntable 5 via a connecting rod passing through the slide groove 10. T-shaped grooves 22 are opened on both adjacent sides of the slider 21. A top block 23 is provided between two adjacent sliders 21. A hydraulic cylinder 210 is provided on the outer side of the top block 23. The surface of the hydraulic cylinder 210 is fixedly connected to the surface of the fixed mold 1. A circular slide plate 25 is slidably connected to the inner wall of the T-shaped groove 22. A telescopic rod 24 is rotatably connected to one end of the slide plate 25. One end of the telescopic rod 24 is rotatably connected to the side of the top block 23.

[0031] Specifically, the turntable 5 is rotated by the motor 4, and the rotational motion of the turntable 5 is precisely converted into the radial linear synchronous motion of the four sliders 21 along the slide groove 10 by utilizing the eccentric cooperation between the arc groove on the surface of the turntable 5 and the connecting rod, thereby realizing the mechanical synchronous closing and opening action of the four sliders 21.

[0032] In this embodiment, a hydraulic telescopic rod 27 is embedded inside the top block 23. A locking block 28 is fixedly connected to the outer end of the hydraulic telescopic rod 27. A clamping block 26 is slidably engaged on the surface of the locking block 28. The clamping block 26 is used to detachably clamp different types of mold cores.

[0033] Specifically, when the hydraulic cylinder 210 pushes the top block 23 inward, the top block 23 applies force to the slide plate 25 through the telescopic rod 24, causing the slide plate 25 to slide in the T-slot 22, thereby pushing the adjacent sliders 21 to move closer together, forming a stable cross-shaped physical locking structure. This structure can provide reliable mechanical support for subsequent mold core clamping.

[0034] In this embodiment, the upper end of the inner wall of the buffer cavity 11 is provided with air holes extending to the upper surface of the fixed mold 1. The inner wall of the air holes is slidably inserted with a die-casting base 29. The lower end of the die-casting base 29 is provided with a rectangular array of columns. The surface of the columns is slidably inserted with the inner wall of the air holes. The air holes are arranged in an inclined manner, and the upper end of the air holes is opened along the upper surface of the fixed mold 1.

[0035] Specifically, when it is necessary to change to a different model of mold core, the controller controls the hydraulic telescopic rod 27 to retract or extend, causing the locking block 28 to engage or disengage with the slot on the clamping block 26, thereby achieving quick locking and unlocking of the clamping block 26. This structure effectively solves the problem of manual disassembly and assembly of screws when changing mold cores in traditional die casting molds, which is time-consuming and labor-intensive, and greatly improves the mold changing efficiency of the production line. When the die casting cycle is completed and demolding is required, the controller controls the external air source to introduce high-pressure cooling gas into the buffer chamber 11 through the air inlet pipe 6. The gas is sprayed upward along the array of air holes opened at the upper end of the fixed mold 1. Since the air holes are inclined, they can not only force convection heat dissipation on the die casting base 29 and the surface of the mold core, but also the lateral blowing force of the airflow can effectively help the die casting overcome the demolding resistance and prevent the occurrence of high temperature sticking.

[0036] In this embodiment, the controller has a built-in spatial coordinate coupling calculation module for synchronous positioning of four sliders; when the motor 4 drives the turntable 5 to rotate, the controller's calculation unit calculates the precise radial displacement of the slider 21 according to the following formula. In the formula, Let be the radius of curvature of the arc-shaped groove on the surface of turntable 5. This represents the real-time rotation angle of motor 4. The stroke correction coefficient is set based on machining tolerances; the controller sends a high-precision pre-clamping signal to the hydraulic cylinder 210 according to the calculation result, so that the four sliders 21 reach a uniform initial spacing before mold closing.

[0037] Specifically, the controller uses this formula to set the precise rotation angle of turntable 5 before mold closing. In the actual manufacturing of die-casting molds, due to the assembly tolerances of various components, an adjustment coefficient is introduced. This effectively compensates for errors caused by mechanical clearances, ensuring that the inner diameter circles of the four sliders 21 have reached a very high degree of concentricity before contacting the mold core, providing a stable and uniform initial physical clearance for subsequent dynamic mold locking to prevent flash.

[0038] In this embodiment, the controller is also equipped with a die-casting punch back pressure calculation module. The controller's signal acquisition terminal is equipped with a sensor for real-time detection of the die-casting machine punch pressure or cavity pressure. When the molten metal is filling the mold at high speed, the controller calculates the pressure value fed back by the sensor. and the projected area of ​​the mold core Calculate the instantaneous reaction force generated by the molten metal on the parting surface of the mold using the following formula. The controller calculates the recoil force in real time. With the clamping force of the current hydraulic cylinder 210 A comparison is made to determine whether there is a problem of flash caused by insufficient clamping force.

[0039] Specifically, the controller analyzes the injection pressure collected by the sensor in real time. The rate of change can accurately determine whether the current die-casting process has entered the high-speed filling stage. Once a recoil force is detected, it can be detected. The calculated value is about to approach or even exceed the current static clamping force. The controller immediately detects a high risk of the parting surface opening due to insufficient clamping force, and thus triggers the next stage of dynamic pressure compensation in advance.

[0040] In this embodiment, the controller also includes a high-speed dynamic compensation and anti-flying edge control algorithm. The controller treats the molten metal filling process as an instantaneous momentum conversion process, and calculates the recoil force... When the force increases in a stepwise manner, the controller immediately provides the target dynamic clamping force according to the following formula. Compensation value: In the formula, The initial holding pressure set before the injection begins. The density of the molten metal, For the filling volume flow rate, The injection velocity of the punch. During the backflushing period of the filling stage, the controller rapidly increases the output pressure of the hydraulic cylinder 210 at the instant the liquid metal contacts the mold, based on this target pressure, to forcibly eliminate the gap between the fixed mold 1 and the slider 21, thus preventing flash from being generated at the source.

[0041] Specifically, the above design enables the instantaneous impulse effect generated by the liquid metal within a very short time Δt, and the controller calculates the target dynamic clamping force accordingly. The hydraulic pump station is controlled in real time to increase the oil supply pressure to the hydraulic cylinder 210. At the moment when the molten metal contacts the mold parting surface, the actuator will quickly generate overpressure thrust to forcibly lock the mating surface between the fixed mold 1 and the slider 21, thereby completely cutting off the path of the high-pressure molten metal overflowing outward at the physical level.

[0042] In this embodiment, the controller also incorporates a multi-stage injection segment pressure variable parameter control algorithm. The controller divides the die casting process into a slow filling segment, a high-speed filling segment, and a pressure holding and shrinkage compensation segment, and sets different basic clamping forces at different stages. When the system detects that it has entered the high-speed filling stage, the controller actively introduces pressure overshoot. The control voltage of the proportional valve is output using the following pressure-time dynamic adjustment formula. In the formula, The reference voltage for the slow speed range of the proportional valve is given by k, where k is the filling response slope coefficient. To detect the moment when the molten metal enters the mold cavity, where t is the current injection time, the algorithm enables the hydraulic cylinder 210 to provide overshoot locking force in advance at the moment of filling, preventing the formation of mold opening gaps.

[0043] Specifically, by setting different clamping force thresholds in segments, the power consumption waste caused by maintaining high pressure in the low-speed stage of traditional molds is avoided. Introducing this S-shaped time response formula in the high-speed filling stage allows the controller to adjust the injection response slope k and the timing of molten metal entering the mold cavity. The intelligent prediction of high-pressure locking time point and the automatic advance pressure overshoot strategy can effectively overcome the reaction delay of the hydraulic system and fundamentally prevent the occurrence of mold opening gaps.

[0044] In this embodiment, the controller's logic operation module includes a target clamping force closed-loop PID control algorithm. This algorithm reads the displacement and pressure sensor signals of the hydraulic cylinder 210 in real time and calculates the target dynamic clamping force. Given a value, the proportional valve opening signal of hydraulic cylinder 210 is dynamically corrected using the following incremental PID control formula. Where e(k) is the deviation between the target clamping force and the actual clamping force at the k-th sampling time. These are the proportional, integral, and derivative adjustment coefficients, respectively, for dynamic adjustment based on the filling load.

[0045] Specifically, the incremental PID algorithm outputs the difference in control quantity Δu(k), which is crucial for preventing large overshoots in the hydraulic proportional valve during sudden stops or accelerations. This algorithm allows for real-time comparison of the target clamping force. Compared with the actual feedback value of the sensor The parameters are dynamically coordinated and adjusted according to the system load, which can quickly suppress pressure fluctuations caused by die casting impact, hydraulic oil temperature changes, system wear, etc., and always maintain high precision and high stability of clamping force.

[0046] In this embodiment, the clamping surface of the clamping block 26 is provided with a roughness range of [missing information]. The micro-nano anti-slip texture is provided, and a metal-ceramic wear-resistant coating is provided on the texture surface. The parting surface where the fixed mold 1 and the slider 21 are combined is also provided with exhaust overflow grooves. Combined with the anti-slip structure of the clamping block 26, stress is effectively dispersed and flash is further absorbed.

[0047] Specifically, the high-roughness anti-slip texture on the surface of clamping block 26, combined with a high-friction coefficient wear-resistant ceramic coating, not only improves the anti-slip force during mold core clamping, but also provides a buffer, containment, and rapid cooling and solidification space for extremely small amounts of high-pressure molten metal that might leak through the clamping force under extreme conditions. This structure effectively prevents the accumulation of tiny flash on the parting surface after solidification, thus maintaining the flatness of the mold parting surface over a long period and further improving the appearance yield of die-cast parts.

[0048] Reference Figures 1-6 The die-casting process of a four-slider radial synchronous sliding die-casting mold structure with quick mold core replacement is as follows:

[0049] S1. When it is necessary to change to a different model of mold core, the operator places the mold core on the die-casting base 29. The controller activates the industrial camera 3 above the fixed mold 1 to acquire images of the mold core and extract the geometric feature center coordinates of the mold core. The controller compares the extracted center coordinates with the preset standard origin on the fixed mold 1 and automatically calculates the visual centering deviation of the mold core, providing a target position basis for subsequent precise clamping.

[0050] S2. Spatial coordinate calculation and high-precision pre-clamping: The controller drives the motor 4 to rotate the turntable 5 according to the calculated deviation. The arc groove on the turntable 5 uses the principle of eccentric fit to push the connecting rod and the four sliders 21 to move radially along the slide groove 10. At the same time, the controller calls the spatial coordinate coupling calculation formula to calculate the precise displacement of the sliders 21 in real time and sends a high-precision pre-clamping signal to the hydraulic cylinder 210, so that the four sliders 21 form an extremely uniform initial locking distance before contacting the mold core.

[0051] S3. Dynamic Injection Response and Anti-Flash Pressure Holding: As the die-casting machine punch begins to advance the molten metal, the controller collects punch pressure or cavity pressure signals in real time through sensors. When the pressure value rises sharply in a step-like manner, the controller determines that the system has entered the high-speed filling stage. At this time, the controller immediately activates the back pressure calculation module, combined with high-speed dynamic compensation and anti-flash control algorithm, to instantly calculate the target dynamic clamping force and actively introduce pressure overshoot. The control voltage of the proportional valve is output through the pressure-time dynamic adjustment formula. This action causes the pressure of the hydraulic cylinder 210 to quickly exceed the static holding pressure in a very short time, applying a forced overpressure locking force to the mating surface of the fixed mold 1 and the slider 21, completely eliminating the small gaps on the parting surface. In the pressure holding and shrinkage compensation stage, the controller collects the clamping force feedback value in real time through the incremental PID closed-loop algorithm and fine-tunes the pressure output of the hydraulic cylinder 210 until the casting solidifies. After die casting is completed, the controller opens the air inlet pipe 6, and high-pressure gas is blown out along the inclined air hole to assist the die casting in rapid demolding and cooling.

[0052] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A four-slider radial synchronous sliding die structure of rapid replaceable core for die casting, comprising a fixed die (1), characterized in that: The upper end of the fixed mold (1) is symmetrically provided with a sliding groove (10). The upper end of the fixed mold (1) is slidably connected with an adjustment mechanism (2). An industrial camera (3) is provided on one side of the upper end of the fixed mold (1). A turntable (5) is provided below the fixed mold (1). A motor (4) is provided at the center of the lower surface of the turntable (5). An air inlet is provided on one side of the center of the lower surface of the turntable (5). An air inlet pipe (6) is fixedly connected to the lower end of the air inlet. The upper end of the air inlet extends to the inner wall of the buffer cavity (11) opened at the center of the upper surface of the fixed mold. A controller is provided on one side of the fixed mold (1). The adjustment mechanism (2) is designed to facilitate quick and easy replacement of die-cast parts of different models.

2. The four-slider radial synchronous sliding die-casting mold structure with quick-change mold core as described in claim 1, characterized in that: The adjustment mechanism (2) includes a slider (21), which is slidably connected to the inner wall of the arc-shaped groove on the surface of the turntable (5) through the connecting rod passing through the slide groove (10). T-shaped grooves (22) are opened on both adjacent sides of the slider (21). A top block (23) is provided between two adjacent sliders (21). A hydraulic cylinder (210) is provided on the outer side of the top block (23). The surface of the hydraulic cylinder (210) is fixedly connected to the surface of the fixed mold (1). A circular slide plate (25) is slidably connected to the inner wall of the T-shaped groove (22). A telescopic rod (24) is rotatably connected to one end of the slide plate (25). One end of the telescopic rod (24) is rotatably connected to the side of the top block (23).

3. The four-slider radial synchronous sliding die-casting mold structure with quick-change mold core as described in claim 2, characterized in that: The top block (23) has a hydraulic telescopic rod (27) embedded inside. The outer end of the hydraulic telescopic rod (27) is fixedly connected to a locking block (28). The surface of the locking block (28) is slidably engaged with a clamping block (26). The clamping block (26) is used to detachably clamp different types of mold cores.

4. The four-slider radial synchronous sliding die-casting mold structure with quick-change mold core as described in claim 3, characterized in that: The upper end of the inner wall of the buffer cavity (11) is provided with air holes extending to the upper surface of the fixed mold (1). The inner wall of the air holes is slidably inserted with a die-casting base (29). The lower end of the die-casting base (29) is provided with a column foot in a rectangular array. The surface of the column foot is slidably inserted with the inner wall of the air hole. The air hole is inclined. The upper end of the air hole is opened along the upper surface of the fixed mold (1).

5. The four-slider radial synchronous sliding die-casting mold structure with quick-change mold core as described in claim 4, characterized in that: The controller has a built-in spatial coordinate coupling calculation module for synchronous positioning of four sliders; when the motor (4) drives the turntable (5) to rotate, the controller's calculation unit calculates the radial precise displacement of the slider (21) according to the following formula. In the formula, The radius of curvature of the arc groove on the surface of the turntable (5) is given by the following: The real-time rotation angle of the motor (4) The stroke correction coefficient is set based on the machining tolerance; the controller sends a high-precision pre-clamping signal to the hydraulic cylinder (210) according to the calculation result, so that the four sliders (21) reach a uniform initial spacing before mold closing.

6. The four-slider radial synchronous sliding die-casting mold structure with quick-change mold core as described in claim 5, characterized in that: The controller is also equipped with a die-casting punch back pressure calculation module. The signal acquisition terminal of the controller is equipped with a sensor for real-time detection of the die-casting machine punch pressure or cavity pressure. When the molten metal is filling the mold at high speed, the controller calculates the pressure value fed back by the sensor. and the projected area of ​​the mold core Calculate the instantaneous recoil force generated by the molten metal on the parting surface of the mold using the following formula. The controller calculates the recoil force in real time. Clamping force of the hydraulic cylinder (210) A comparison is made to determine whether there is a problem of flash caused by insufficient clamping force.

7. The four-slider radial synchronous sliding die-casting mold structure with quick-change mold core as described in claim 6, characterized in that: The controller also includes high-speed dynamic compensation and anti-flying edge control algorithms. The controller treats the molten metal filling process as an instantaneous momentum conversion process, and calculates the recoil force... When the force increases in a stepwise manner, the controller immediately provides the target dynamic clamping force according to the following formula. Compensation value: In the formula, The initial pressure set before the injection begins. The density of the molten metal, For the filling volume flow rate, The injection velocity of the punch. During the backflushing period of the filling stage, the controller rapidly increases the output pressure of the hydraulic cylinder (210) at the instant the liquid metal contacts the mold, based on the target pressure, to forcibly eliminate the gap between the fixed mold (1) and the slider (21), thus preventing flash from being generated at the source.

8. The four-slider radial synchronous sliding die-casting mold structure with quick-change mold core as described in claim 7, characterized in that: The controller also incorporates a multi-stage injection segment pressure variable parameter control algorithm, which divides the die casting process into a slow filling segment, a high-speed filling segment, and a pressure holding and shrinkage compensation segment, and sets different basic clamping forces for each stage. When the system detects that it has entered the high-speed filling stage, the controller actively introduces a pressure overshoot. The control voltage of the proportional valve is output using the following pressure-time dynamic adjustment formula. In the formula, The reference voltage for the slow speed range of the proportional valve is given by k, where k is the filling response slope coefficient. To detect the moment when the molten metal enters the mold cavity, where t is the current injection time, the algorithm enables the hydraulic cylinder (210) to provide an overshoot locking force in advance at the moment of filling, preventing the formation of mold opening gaps.

9. A four-slider radial synchronous sliding die-casting mold structure with quick-change mold core as described in claim 8, characterized in that: The logic operation module of the controller includes a closed-loop PID control algorithm for the target clamping force. This algorithm reads the displacement and pressure sensor signals of the hydraulic cylinder (210) in real time and calculates the target dynamic clamping force. Given a value, the proportional valve opening signal of the hydraulic cylinder (210) is dynamically corrected using the following incremental PID control formula. Where e(k) is the deviation between the target clamping force and the actual clamping force at the k-th sampling time. These are the proportional, integral, and derivative adjustment coefficients, respectively, for dynamic adjustment based on the filling load.

10. A four-slider radial synchronous sliding die-casting mold structure with quick-change mold core as described in claim 9, characterized in that: The clamping surface of the clamping block (26) is provided with a roughness range of [missing information]. The micro-nano anti-slip texture is provided, and a metal-ceramic wear-resistant coating is provided on the texture surface. The parting surface where the fixed mold (1) and the slider (21) are combined is also provided with exhaust overflow grooves. Combined with the anti-slip structure of the clamping block (26), stress is effectively dispersed and flash is further absorbed.

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