Multi-dimensional composite piston mold opening and closing device

Abstract

The application discloses a kind of multidimensional composite piston mold opening and closing device, it is related to piston mold casting technical field, including T cross arm and outer mold, further include: middle fan subassembly, it is set to outer mold upper side, including middle fan and middle fan edge, when carrying out demolding, middle fan middle drives two groups of middle fan edge first inward then upward movement;Clamp block, it is set to the upper side of middle fan edge;Pressing subassembly, it is set to the upper side of middle fan subassembly, including elastic piece, in demolding process, elastic piece presses down clamp block and makes the height of middle fan edge unchanged;When middle fan edge fatigue damage occurs, elastic piece drives clamp block clamping middle fan edge and drives middle fan edge to follow middle fan middle synchronous upshift;The application is overall planning each component linkage by PLC and oil cylinder system, realizes piston mold automated precision mold closing, non-injury demolding, when demolding, accurate limit to middle fan edge, casting vibration exhaust prevents sticking in the middle, also can protect middle fan subassembly fatigue damage, simplify process.

Description

Technical Field

[0001] This invention relates to the field of piston mold casting technology, and in particular to a multidimensional composite piston mold opening and closing device. Background Technology

[0002] The core basic blank for piston finishing is the casting and molding precision and finished product qualification rate. The casting and molding precision and finished product qualification rate directly determine the structural strength, pressure resistance and impact resistance and actual service life of the piston finished product. This places extremely high demands on the automation, precision and stability of the piston mold opening and closing device.

[0003] Chinese Patent CN106413939A discloses a casting mold, including an inner mold and an outer mold, a thermal insulation material layer, a fixing plate and a release rod, wherein the inner mold includes a first shell and a cooling element disposed on the first shell; the first shell has a first side wall and a second side wall opposite to the first side wall.

[0004] The above-mentioned technical solutions have many defects in actual use. For example, the opening and closing of traditional piston molds requires many complicated linkage actions, and most of them rely on manual operation. They lack a fully automated opening and closing structure design, resulting in a low level of automation in piston blank casting production.

[0005] Furthermore, in the piston blank demolding process, traditional molds lack a demolding linkage design that prevents damage. After the aluminum liquid is poured and solidified, the piston blank will fit tightly with the mold cavity. If the demolding is done by forcibly disassembling it with external force, it is very easy to cause irreversible damage such as bumps and scratches to the formed piston blank, which will directly lead to the scrapping of the piston blank. In addition, the manual demolding operation is cumbersome, which further reduces the overall production efficiency.

[0006] Traditional aluminum molten casting relies solely on the venting grooves pre-reserved in the mold to achieve cavity venting, lacking an active venting structure design. This makes it impossible to effectively remove the mixed gases that are trapped in the cavity during the aluminum molten casting process. Furthermore, the central fan assembly lacks a function to cool the center of the aluminum molten material. When the amount of aluminum molten material changes, it cannot adaptively adjust the venting and cooling efficiency, which significantly reduces the overall structural strength of the piston and affects its subsequent core performance characteristics such as pressure resistance and impact resistance, severely reducing the quality stability of the finished piston.

[0007] The central fan and the edge of the mold are linked by sliding contact between T-blocks and T-slots. Under long-term mold opening and closing operations, this connection part is prone to fatigue damage due to the combined effects of sliding friction and force compression. As a result, when the central fan moves upward to demold, the edge of the central fan is located inside the mold and cannot be demolded.

[0008] Meanwhile, friction is inevitable on the sliding mating surfaces of the T-block and the T-slot. During the upward demolding process, the middle fan will move upward synchronously with the middle fan edge through this friction, which will cause the middle fan edge to rub and bump against the cast piston blank, resulting in scratches on the blank surface and local structural damage. This directly reduces the finished product qualification rate of the piston blank and greatly increases the material loss in production. Summary of the Invention

[0009] The purpose of this invention is to provide a multidimensional composite piston mold opening and closing device to solve the problems mentioned in the background art.

[0010] To achieve the above objectives, the present invention provides the following technical solution: a multidimensional composite piston mold opening and closing device, comprising a T-shaped crossbeam and an outer mold, and further comprising: The middle fan assembly is located on the upper side of the outer mold and includes the middle fan center and the middle fan side. When demolding, the middle fan center drives the two sets of middle fan side to move inward first and then upward. The card block is located on the upper side of the middle fan edge; The pressing component, which is located on the upper side of the middle fan component, includes an elastic element. During the demolding process, the elastic element presses down on the locking block and keeps the height of the middle fan edge unchanged. When the middle fan edge suffers fatigue damage, the elastic element drives the locking block to clamp the middle fan edge and drives the middle fan edge to move upward synchronously with the middle fan.

[0011] Preferably, the lower side of the T-shaped crossarm is provided with a sliding plate, a transverse slider, and a middle fan connecting seat from top to bottom, and the sliding plate, transverse slider, and middle fan connecting seat move up and down synchronously with the T-shaped crossarm; a base is provided below the outer mold through the mold bottom, and an annular buckle is provided on it to form the outer forming cavity of the piston blank; the outer mold includes two mold cavities for forming the outer contour of the piston blank, and an annular stop is provided inside to cooperate with the mold bottom; a flow cavity is provided inside the middle fan side.

[0012] Preferably, the middle fan is located on the lower side of the middle fan connecting seat, with V-shaped inclined surfaces on both sides and T-shaped grooves symmetrically arranged inside. The upper outer end has a stepped structure, and it moves synchronously with the middle fan connecting seat when the mold is opened and closed. The middle fan side is symmetrically arranged on both sides of the middle fan, and the side of the middle fan side close to the middle fan is also V-shaped inclined surface, and a T-shaped block is arranged on it. The T-shaped block is slidably connected to the T-shaped groove. When the mold is opened, it is lifted with the middle fan and moves towards the middle along the inclined surface. When the mold is closed, it is pressed by the stepped structure of the middle fan.

[0013] Preferred options also include: The large side fan is located on the inner side of the outer mold and cooperates with the outer mold to form a complete piston forming cavity; The small side fan is located inside the large side fan, connecting the middle fan assembly and the large side fan. When the mold is closed, it is pressed by the middle fan assembly and transmits pressure to the large side fan. When the mold is opened, it moves synchronously with the large side fan. The linkage combination mold is set on the upper side of the small side panel, and drives the large side panel and the small side panel to move synchronously when the mold is closed and demolded.

[0014] Preferably, the linkage assembly opening template has an opening inside, and a screw is provided on the upper side of the linkage assembly opening template. The screw passes through the opening and extends through the linkage assembly opening template to the lower side, where it is fixedly connected to the large side fan. A nut is provided at the upper end of the screw. When the linkage assembly opening template rises, the nut is lifted, causing the large side fan to rise. A bolt sleeve is provided between the linkage assembly opening template and the large side fan to evenly transmit the pressure of the small side fan to the large side fan. A pin is provided inside the outer mold to limit and guide the large side fan.

[0015] Preferably, hydraulic cylinder systems are provided on the upper side of the T-shaped crossbeam, the outer sides of the two sets of outer molds, and the outer sides of the two sets of linked combined opening molds to drive the components to move synchronously; the action sequence, speed, and stroke of the multiple hydraulic cylinder systems are controlled by a PLC system.

[0016] Preferably, the pressing component further includes: The T-shaped plate is located on the lower side of the middle fan connecting seat; The connector is symmetrically arranged on the lower side of the T-shaped plate, with its upper surface connected to the T-shaped plate and its lower surface connected to the middle fan. The U-shaped part is slidably disposed on the lower side of the T-shaped plate; the elastic element is disposed on the lower side of the U-shaped part and its lower end is connected to the locking block. When demolding, the elastic element presses down on the locking block.

[0017] Preferably, the pressing component further includes: A movable component, located inside the U-shaped component, is used to move the U-shaped component. The fixing component is located on the upper side of the middle fan, and its upper surface is a wedge-shaped surface, which is used to drive the moving component to move laterally. The reset component, which is symmetrically arranged on the side of the T-shaped plate and has elasticity, is used to drive the U-shaped component to reset laterally. The limiting groove is located on the side of the middle fan edge. When the middle fan edge and the middle fan center crack, the locking block enters the limiting groove and drives the middle fan edge to move synchronously with the middle fan center.

[0018] The technical effects and advantages of this invention are as follows: 1. This invention uses a PLC system to coordinate the linkage between various hydraulic cylinder systems and mold components, thereby achieving automated and precise positioning and sealing of the piston mold during mold closing. This reduces blank forming defects caused by mold closing positioning deviations and ensures the automation level of piston casting production and blank forming accuracy.

[0019] 2. This invention uses a hydraulic cylinder system to drive each mold component in a precise and coordinated manner, thereby achieving undamaged and automated demolding of the piston mold. This optimizes the demolding process of the piston blank, reduces the damage caused by the mold to the blank during demolding, and minimizes material loss, thus improving the demolding efficiency and finished product qualification rate of the piston blank.

[0020] 3. This invention achieves precise vertical positioning and fixation of the middle fan edge in the early stage of demolding by linking the elastic element and locking block of the pressing component with the middle fan component, thereby reducing the scratch and bump damage of the middle fan edge to the piston blank and the loss of production materials, and improving the finished product qualification rate of the piston blank.

[0021] 4. This invention uses a hydraulic cylinder system to drive the pressing component and the central fan component in a coordinated manner, thereby achieving micro-vibration venting and fixed-point cooling of the mold during the casting process, optimizing the cavity venting effect of aluminum liquid casting, and improving the structural strength of the piston and the stability of the finished product quality.

[0022] 5. This invention achieves synchronous traction protection after damage to the middle fan assembly by linking the elastic element, the locking block and the limiting groove of the pressing component, thereby reducing irreversible structural damage to the mold and equipment maintenance costs, and improving the continuity of piston casting production and the service life of the mold. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a partial structural diagram of the middle fan connecting seat of the present invention; Figure 3 This is a partial structural diagram of the middle fan assembly of the present invention; Figure 4 This is a schematic diagram of a portion of the mold bottom structure of the present invention; Figure 5 This is an exploded view of a portion of the structure of the middle fan assembly of the present invention; Figure 6 This is a schematic diagram of the middle section of the fan-shaped part of the present invention; Figure 7 This is a schematic diagram of the internal structure of a portion of the middle fan of the present invention; Figure 8 For the present invention Figure 7 Enlarged structural diagram at point A in the middle; Figure 9 This is a schematic diagram of the U-shaped component structure of the present invention.

[0024] In the diagram: 1. Base; 2. T-shaped crossbeam; 3. Slide plate; 4. Horizontal slider; 5. Middle fan connecting seat; 6. Middle fan assembly; 601. Middle fan center; 602. Middle fan side; 603. T-shaped block; 604. T-shaped groove; 7. Pressing assembly; 701. T-shaped plate; 702. Connector; 703. Fixing component; 704. U-shaped component; 705. Moving component; 706. Elastic component; 707. Limiting groove; 708. Reset component; 8. Outer mold; 9. Mold bottom; 10. Large side fan; 11. Small side fan; 12. Linkage combination opening template; 13. Locking block; 14. Flow cavity. Detailed Implementation

[0025] 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 skilled in the art without creative effort are within the scope of protection of the present invention. Example 1

[0026] In the casting production of piston blanks, traditional molds are complex in overall structure design, and the opening and closing of the mold requires multiple cumbersome linkage actions, most of which are done manually. This not only significantly reduces the level of automation in production, but also severely restricts the overall production capacity and efficiency of piston blanks due to the efficiency limitations and operational errors of manual operation. At the same time, if the mold is directly processed into an integrated molding structure that matches the contour of the piston blank, the piston blank will be tightly attached to the mold cavity after the aluminum liquid is cast and solidified, making it impossible to remove it directly from the mold. Demolding by using external force to forcibly disassemble the mold can easily cause irreversible damage such as bumps and scratches to the formed piston blank, which greatly reduces the finished product qualification rate of the piston blank.

[0027] This invention provides, for example Figures 1 to 9 The multidimensional composite piston mold opening and closing device shown includes a T-shaped crossbeam 2 and an outer mold 8, and further includes: a middle fan assembly 6, which is disposed on the upper side of the outer mold 8, including a middle fan center 601 and a middle fan edge 602. When demolding, the middle fan center 601 drives the two sets of middle fan edges 602 to move inward first and then upward; a locking block 13, which is disposed on the upper side of the middle fan edge 602. During demolding, the locking block 13 limits the middle fan edge 602 and keeps its height unchanged; a pressing assembly 7, which is disposed on the upper side of the middle fan assembly 6, including an elastic element 706. During demolding, the elastic element 706 presses the locking block 13 downward to keep the height of the middle fan edge 602 unchanged; when the middle fan edge 602 suffers fatigue damage, the elastic element 706 drives the locking block 13 to clamp the middle fan edge 602 and drive the middle fan edge 602 to move upward synchronously with the middle fan center 601.

[0028] The lower side of the T-crossarm 2 is provided with a sliding plate 3, a transverse slider 4 and a middle fan connecting seat 5 from top to bottom. The sliding plate 3, the transverse slider 4 and the middle fan connecting seat 5 move up and down synchronously with the T-crossarm 2. The base 1 is provided below the outer mold 8 through the mold bottom 9, and an annular buckle is provided on it to form the outer forming cavity of the piston blank. The outer mold 8 includes two mold cavities for forming the outer contour of the piston blank, and an annular stop is provided inside to cooperate with the mold bottom 9.

[0029] The central fan 601 is located below the central fan connecting seat 5. It has V-shaped slopes on both sides and symmetrically arranged T-slots 604 inside. The upper outer end has a stepped structure, allowing it to move synchronously with the central fan connecting seat 5 during mold opening and closing. The central fan side 602 is symmetrically arranged on both sides of the central fan 601. The side of the central fan side 602 near the central fan 601 also has a V-shaped slope, and a T-block 603 is provided on it. The T-block 603 is slidably connected to the T-slot 604, and during mold opening, it rises with the central fan 601 and moves along the slope. It moves towards the center; when the mold is closed, it is pressed by the stepped structure of the middle fan 601; the inside of the middle fan side 602 is provided with a flow cavity 14, and the locking block 13 is movably connected to the top outlet of the flow cavity 14. The setting of the flow cavity 14 realizes the fixed-point cooling effect inside the aluminum liquid, and the locking block 13 blocks the outlet of the flow cavity 14 to adjust the cooling efficiency accordingly. When it is not working, the locking block 13 blocks the outlet of the flow cavity 14 to prevent external impurities from entering the flow cavity 14 and affecting the subsequent cooling effect.

[0030] The large side fan 10 is located inside the outer mold 8 and forms a complete piston forming cavity with the outer mold 8. The small side fan 11 is located inside the large side fan 10 and connects the middle fan assembly 6 and the large side fan 10. When the mold is closed, it is pressed by the middle fan assembly 6 and transmits pressure to the large side fan 10. When the mold is opened, it moves synchronously with the large side fan 10. The linkage combination opening platen 12 is located on the upper side of the small side fan 11 and drives the large side fan 10 and the small side fan 11 to move synchronously when the mold is closed and demolded.

[0031] The linkage combined opening template 12 has an opening inside. A screw is provided on the upper side of the linkage combined opening template 12. The screw passes through the opening and passes through the linkage combined opening template 12 to the lower side to be fixedly connected to the large side fan 10. A nut is provided at the upper end of the screw. When the linkage combined opening template 12 rises, the nut is lifted to drive the large side fan 10 to rise. A bolt pressure sleeve is provided between the linkage combined opening template 12 and the large side fan 10 to evenly transmit the pressure of the small side fan 11 to the large side fan 10. A pin is provided inside the outer mold 8 to limit and guide the large side fan 10.

[0032] Hydraulic cylinder systems are installed on the upper side of the T-shaped crossbeam 2, the outer sides of the two sets of outer molds 8, and the outer sides of the two sets of linked combined opening molds 12. These systems are used to drive the components to move synchronously. The sequence of action, speed, and stroke of the multiple hydraulic cylinder systems are controlled by the PLC system.

[0033] The pressing assembly 7 also includes: a T-shaped plate 701, which is disposed on the lower side of the middle fan connecting seat 5; and a connector 702, which is symmetrically disposed on the lower side of the T-shaped plate 701, with its upper surface connected to the T-shaped plate 701 and its lower surface connected to the middle fan 601, and is composed of an elastic material and can be compressed.

[0034] In summary, addressing the issues of traditional piston blank casting molds relying on manual operation, cumbersome movements, and low positioning accuracy in opening and closing, this device utilizes a PLC system to coordinate and control all hydraulic cylinder systems, achieving fully automated and precise mold closing. When casting a piston blank, the hydraulic cylinder system first controls the two-sided linkage combined opening platen 12 to extend forward a short distance simultaneously, precisely driving the small side fan 11 downward. When the linkage combined opening platen 12 descends to the upper surface of the large side fan 10, the bolt sleeve on the outer side of the pressing screw evenly transmits pressure to the large side fan 10, allowing the large side fan 10 to precisely embed into the mold cavity of the outer mold 8. Subsequently, the linkage combined opening platen 12 retracts, allowing the small side fan 11 to fit tightly against the large side fan 10, and the large side fan 10 to fit tightly against the inner wall of the mold cavity of the outer mold 8, completing the precise positioning of the side fan assembly and avoiding blank forming defects caused by traditional mold closing positioning deviations.

[0035] Next, the two outer mold halves 8 move synchronously towards the center of the mold bottom 9, pausing when a preset small distance is maintained between them to prevent hard contact from causing damage to the mold. Then, the hydraulic cylinder system drives the T crossbeam 2 to move smoothly downward, sequentially driving the slide plate 3, the transverse slider 4, and the middle fan connecting seat 5 to move downward synchronously, thereby precisely pulling the middle fan 601 and the middle fan side 602 downward to the top of the small side fan 11 while maintaining a very small preset distance, achieving precise alignment between the middle fan assembly 6 and the side fan. After that, the outer mold 8 further closes towards the center, completing the sealing and closure of the piston blank's external forming cavity. The T crossbeam 2 continues to move downward, causing the middle fan 601 and the middle fan side 602 to continue to press downward until the middle fan assembly 6 firmly presses the small side fan 11, and the small side fan 11 evenly transmits pressure to the large side fan 10. All components form a seamless and tightly pressed state. At this point, the fully automated mold closing process is completed, and the forming cavity forms a sealed and precise casting space, allowing for the aluminum molten casting of the piston blank.

[0036] During the casting process, all components are in a stable and static state. The connector 702 is compressed to provide downward extrusion force to the central fan 601. At this time, the heat of the aluminum liquid can flow outward along the flow cavity 14, thereby avoiding structural damage to the central fan 601 and the central fan edge 602 caused by prolonged exposure to high temperature and uneven cooling efficiency of the internal aluminum liquid. After the piston blank is cast, in response to the problems of traditional demolding methods that are prone to pulling and bumping the blank due to improper mold linkage, and low efficiency and easy damage to the blank caused by manual demolding, this device achieves damage-free automated demolding through the step-by-step precise linkage of the hydraulic cylinder system. The hydraulic cylinder system first drives the T crossbeam 2 to move smoothly upward, and then drives the slide plate 3, the transverse slider 4, and the central fan connecting seat 5 to move upward synchronously, thereby driving the central fan 601 to be lifted upward.

[0037] The middle fan edge 602 slides with the T-slot 604 of the middle fan 601 via the T-block 603. Under the combined action of the V-shaped inclined surface and the limiting action of the T-slot 604, the middle fan edge 602 moves horizontally towards the center while being lifted, until the middle fan 601 and the middle fan edge 602 are completely separated from the outer mold 8 and the small side fan 11. The T-crossarm 2 then stops moving upward and remains in a safe position to avoid interference with other components.

[0038] Next, the linkage combination opening template 12 on one side drives the small side fan 11 to extend forward a short distance and then rise smoothly upward. At this time, since the width of the small side fan 11 is smaller than the width of the middle fan assembly 6, the small side fan 11 will not squeeze or collide with the inner wall of the piston blank when it moves forward and rises. When it contacts the nut at the upper end of the screw, the nut and screw are lifted simultaneously, accurately driving the large side fan 10 to rise until it is completely separated from the pit and contact surface of the piston blank. During this process, the pin on the mold cavity step of the outer mold 8 plays a precise guiding role. When the linkage combination opening template 12 retracts, the pin plays a stable positioning role, effectively preventing the large side fan 10 from moving back and forth and causing damage to the blank. The linkage combination opening template 12 on the other side completes the same action simultaneously, realizing the undamaged separation of the large side fans 10 on both sides.

[0039] Finally, the casting machine's hydraulic cylinder system drives the two outer mold halves 8, which, together with the linkage combination opening mold 12, large side fan 10, and small side fan 11, simultaneously separate horizontally and smoothly to both sides until the piston blank is in a safe removal position without any mold obstruction. The robotic arm then precisely and safely removes the piston blank from the mold bottom 9, completing the fully automated demolding process without human intervention. Example 2

[0040] While the above embodiments effectively solve the industry pain points of traditional piston casting processes, such as cumbersome procedures, the need for multiple castings, and the difficulty of mold removal after casting, several technical problems still need to be optimized in the actual production and application of multidimensional composite pistons. Specifically, these problems are as follows: First, in the aluminum liquid casting process of multidimensional composite pistons, the traditional method relies solely on the venting grooves reserved in the mold to achieve cavity venting. However, it cannot effectively remove the mixed gases that are trapped in the cavity during the aluminum liquid casting process. These residual gases will form internal pores and remain in the piston blank after the aluminum liquid cools and solidifies. Furthermore, the central fan assembly 6 lacks a function for targeted cooling of the center position of the aluminum liquid, and it cannot adaptively adjust the venting and cooling efficiency when the amount of cast aluminum liquid changes. This not only significantly reduces the overall structural strength of the piston but also affects its subsequent core performance characteristics such as pressure resistance and impact resistance, seriously reducing the quality stability of the finished piston. Second, with As the number of mold closing and demolding operations accumulates, the T-slot 604 and T-block 603 suffer fatigue damage due to the combined effects of sliding friction and pressure, and their structural toughness gradually decreases. If the traditional demolding method is still used at this time, the upward movement of the middle fan 601 cannot drive the middle fan edge 602 to move upward and demold synchronously. This will not only cause irreversible structural damage to the core components of the mold, but also lead to mold downtime for maintenance, significantly reducing production efficiency and increasing equipment maintenance costs. Thirdly, because the sliding mating surface of the T-block 603 and the T-slot 604 inevitably has friction, during the upward demolding process of the middle fan 601, the middle fan edge 602 will move upward synchronously through this friction, which will cause the middle fan edge 602 to rub and collide with the cast piston blank, causing scratches on the blank surface and local structural damage, directly reducing the finished product qualification rate of the piston blank and increasing production material loss.

[0041] The pressing assembly 7 in the multidimensional composite piston mold opening and closing device further includes: a U-shaped component 704, which is slidably disposed on the lower side of the T-shaped plate 701; an elastic component 706 disposed on the lower side of the U-shaped component 704 and connected at its lower end to the locking block 13, wherein the elastic component 706 presses down on the locking block 13 during demolding; a moving component 705 disposed inside the U-shaped component 704, the lower surface of which is a wedge-shaped surface, which slides in a wedge shape with the fixing component 703 to drive the U-shaped component 704 to move; and a fixing component 705. Component 703 is located on the upper side of the middle fan 601, and its upper surface is wedge-shaped, used to drive the moving component 705 to move laterally; reset component 708 is symmetrically located on the side of the T-shaped plate 701, used to drive the U-shaped component 704 to reset laterally; limiting groove 707 is opened on the side of the middle fan edge 602, and when the middle fan edge 602 and the middle fan 601 crack, the locking block 13 enters the limiting groove 707 to drive the middle fan edge 602 to move synchronously with the middle fan 601.

[0042] In summary, when casting a multi-dimensional composite piston, the mold-closing action of the outer mold 8, the middle fan assembly 6, the large side fan 10, and the small side fan 11 is completed first. The hydraulic cylinder system drives the middle fan connecting seat 5, thereby driving the T-shaped plate 701 to move downward, and then driving the middle fan 601 to move downward simultaneously (the basic mold-closing action is as described in Example 1). During this process, the lower surface of the locking block 13 will first abut against the upper surface of the middle fan side 602. As the T-shaped plate 701 continues to drive the middle fan 601 downward, it will continuously compress the elastic element 706 until the middle fan 601 reaches the preset mold-closing position. At this time, the connecting... When the connector 702 is in a stretched state, as the T-shaped plate 701 and the middle fan 601 continue to move downward, the middle fan side 602 is guided by the inclined surface to slowly move away from the middle fan 601. The connector 702 is then interrupted from stretching and is gradually compressed until all components are pressed together to complete the mold closing. Throughout the mold closing process, the locking block 13 is always in close contact with the side of the middle fan 601 under the elastic force of the reset component 708. At the same time, the wedge-shaped surface at the upper end of the fixing component 703 and the wedge-shaped surface at the lower side of the moving component 705 are in close contact, preparing the structure for subsequent operations.

[0043] When casting molten aluminum with a multi-dimensional composite piston inside the outer mold 8, if affected by factors such as the external environment and casting flow rate, the gas entrained in the molten aluminum and the gas trapped in the mold cavity are difficult to be discharged smoothly through the exhaust groove, the hydraulic cylinder system will automatically start, driving the T-shaped crossbeam 2, the slide plate 3 and the transverse slider 4 to move up and down slightly within the first preset range, thereby pulling the middle fan connecting seat 5 to move up and down synchronously. The up and down movement of the middle fan connecting seat 5 will drive the T-shaped plate 701 to move synchronously, thereby driving the U-shaped part 704 and the moving part 705 to move up and down. Since the height of the middle fan 601 and the fixed part 703 remains fixed, the moving part 705 moves up and down while being guided by the inclined surface of the fixed part 703 to move left and right synchronously, thereby driving the U-shaped part 704, the elastic part 706 and the locking block 13 to move left and right synchronously. In addition, the temperature inside the molten aluminum will be transferred to the inside of the flow cavity 14 through the middle fan edge 602, and finally flow outward along the flow cavity 14 to be discharged, thereby achieving the effect of fixed-point cooling of the molten aluminum.

[0044] During its movement, the card block 13 will continuously impact the side of the middle fan 601, causing the middle fan 601 to vibrate slightly. This vibration will be transmitted to the incompletely solidified aluminum liquid inside the outer mold 8, allowing the residual gas in the aluminum liquid to be quickly released and discharged through the exhaust groove, thereby reducing the internal porosity of the piston and improving the structural strength of the piston from the source.

[0045] When the amount of molten aluminum in the outer mold 8 increases, the amount of air bubbles in the molten aluminum also increases accordingly. At this time, the middle fan connecting seat 5 will move up and down within the second preset range, causing the contact surface between the fixed part 703 and the moving part 705 to move upward, thereby increasing the lateral movement distance of the moving part 705. After the movement distance of the moving part 705 increases, the lateral movement distance of the U-shaped part 704 and the elastic part 706 also increases synchronously, ultimately expanding the lateral movement stroke of the locking block 13. At the same frequency at which the middle fan connecting seat 5 drives the T-shaped plate 701 to move up and down, the impact force of the locking block 13 on the middle fan 601 is significantly increased, causing the middle fan 601 to generate stronger vibration. This specifically solves the problem of increased air bubbles when the amount of molten aluminum increases during the casting process, ensuring the integrity of the mold and piston blank.

[0046] Meanwhile, as the amount of molten aluminum increases, the volume and heat of the molten aluminum inside the cavity increase simultaneously. The natural solidification rate of the molten aluminum decreases within the same time frame, and the amount of heat transferred from the molten aluminum to the middle fan edge 602 increases. This causes the middle fan edge 602 to absorb a large amount of heat in a short time and accumulate continuously, resulting in thermal fatigue. At this time, the lateral movement of the clamping block 13 is expanded, which not only increases the impact force on the middle fan edge 601 and strengthens the vibration and exhaust effect, but also simultaneously increases the opening area of ​​the flow cavity 14 inside the middle fan edge 602, increasing the contact area between the middle fan edge 602 and the outside air. This increases the heat exchange rate between the middle fan edge 602 and the outside environment, avoiding the thermal fatigue problem caused by long-term heat accumulation in the middle fan edge 602 and ensuring the structural stability of the mold components. After demolding is completed, the clamping block 13 moves to the initial position and blocks the outlet of the flow cavity 14, effectively preventing impurities in the external environment from entering the flow cavity 14 and affecting subsequent casting.

[0047] After the aluminum liquid of the multidimensional composite piston is poured and solidified, the demolding operation is initiated. The hydraulic cylinder system sequentially moves the T-shaped crossbeam 2, the sliding plate 3, the transverse slider 4, and the middle fan connecting seat 5 upward according to a preset program. The upward movement of the middle fan connecting seat 5 causes the T-shaped plate 701 and the connecting piece 702 to move synchronously, thereby pulling the middle fan 601 upward. The middle fan edge 602 slides with the T-shaped groove 604 of the middle fan 601 through the T-shaped block 603. Under the combined action of the inclined guide and the groove limit, it moves horizontally towards the middle fan 601 (the basic demolding action is as described in Example 1); at the same time, the middle fan edge 602 is continuously supported by the elastic element 706. Under the action of elastic compression, it maintains a static state in the vertical direction, which fundamentally avoids the T-block 603 from moving upward synchronously due to the friction between it and the T-slot 604 during the upward movement of the middle fan 601. This prevents the mold components from scratching and damaging the multidimensional composite piston blank already formed in the outer mold 8. After the middle fan 601 moves upward to the preset height, the compression state of the elastic element 706 is released, and the middle fan edge 602 loses the downward pressing force. Then, it moves upward synchronously under the traction of the middle fan 601. The other mold components repeat the demolding action in Embodiment 1 until the demolding operation of the entire multidimensional composite piston is completed. Then, the equipment is reset and waits for the next mold closing and casting process.

[0048] If, during the demolding process, the T-slot 604 and T-block 603 may suffer fatigue damage due to prolonged use, and the central fan 601 moves upward without simultaneously moving the central fan edge 602 to the appropriate position, especially if the central fan 601 continues to move upward without causing the central fan edge 602 to move upward for demolding, the hydraulic cylinder system will immediately drive the central fan connecting seat 5 to stop moving upward and move downward to the third preset position. The downward movement of the central fan connecting seat 5 will cause the T-plate 701 to move downward simultaneously, on the one hand relieving the tension of the connecting part 702 on the central fan 601, and on the other hand driving the U-shaped part 704 and the moving part 705 to move downward. Since the height of the central fan 601 and the fixed part 703 is fixed, the moving part 705 moves downward while being guided by the fixed part 703 to move away from the central fan 601, thereby driving the U-shaped part 704, the elastic part 706 and the locking block 13 to move outward simultaneously, ultimately causing the locking block 13 to disengage from the upper surface of the central fan edge 602.

[0049] After the locking block 13 disengages, it moves downward under the elastic action of the elastic element 706. When the side of the locking block 13 aligns with the limiting groove 707 of the middle fan edge 602, the locking block 13 will be embedded into the limiting groove 707 under the pushing action of the reset element 708, thus completing the clamping and positioning of the middle fan edge 602. At this time, the middle fan connecting seat 5 stops moving downward and moves upward under the drive of the hydraulic cylinder system, driving the T-shaped plate 701 to move upward synchronously. Then, the connecting element 702 and the U-shaped element 704 simultaneously pull the middle fan 601 and the middle fan edge 602 to move upward synchronously, effectively avoiding relative displacement between the two, forming effective protection for the core components of the mold, and reducing irreversible structural damage.

[0050] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A multidimensional composite piston mold opening and closing device, comprising a T-shaped crossbeam (2) and an outer mold (8), characterized in that, Also includes: The middle fan assembly (6) is located on the upper side of the outer mold (8) and includes the middle fan center (601) and the middle fan side (602). When demolding, the middle fan center (601) drives the two sets of middle fan side (602) to move inward and then upward. A card block (13) is located on the upper side of the middle fan edge (602); The pressing component (7) is located on the upper side of the middle fan component (6) and includes an elastic element (706). During the demolding process, the elastic element (706) presses down on the locking block (13) and keeps the height of the middle fan edge (602) unchanged. When the middle fan edge (602) suffers fatigue damage, the elastic element (706) drives the locking block (13) to clamp the middle fan edge (602) and drive the middle fan edge (602) to move upward synchronously with the middle fan (601).

2. The multidimensional composite piston mold opening and closing device according to claim 1, characterized in that, The lower side of the T-shaped crossarm (2) is provided with a sliding plate (3), a horizontal slider (4) and a middle fan connecting seat (5) from top to bottom. The sliding plate (3), the horizontal slider (4) and the middle fan connecting seat (5) move up and down synchronously with the T-shaped crossarm (2). The outer mold (8) is provided with a base (1) through the mold bottom (9) below it, and a ring buckle is provided on it to form the outer forming cavity of the piston blank. The outer mold (8) includes two mold cavities for forming the outer contour of the piston blank. The inner cavity is provided with a ring stop that cooperates with the mold bottom (9). The middle fan side (602) is provided with a flow cavity (14), and the locking block (13) is movably connected to the top outlet of the flow cavity (14).

3. The multidimensional composite piston mold opening and closing device according to claim 2, characterized in that, The middle fan (601) is located on the lower side of the middle fan connecting seat (5). It has V-shaped inclined surfaces on both sides and T-shaped grooves (604) symmetrically arranged inside. The upper outer side has a stepped structure. It moves synchronously with the middle fan connecting seat (5) when the mold is opened and closed. The middle fan side (602) is symmetrically arranged on both sides of the middle fan (601). The side of the middle fan side (602) close to the middle fan (601) is also a V-shaped inclined surface, and a T-shaped block (603) is arranged on it. The T-shaped block (603) is slidably connected to the T-shaped groove (604). When the mold is opened, it is lifted with the middle fan (601) and moves towards the middle along the inclined surface. When the mold is closed, it is pressed by the stepped structure of the middle fan (601).

4. The multidimensional composite piston mold opening and closing device according to claim 2, characterized in that, Also includes: The large side fan (10) is located inside the outer mold (8) and cooperates with the outer mold (8) to form a complete piston forming cavity; The small side fan (11) is located inside the large side fan (10), connecting the middle fan assembly (6) and the large side fan (10). When the mold is closed, it is pressed by the middle fan assembly (6) and transmits pressure to the large side fan (10). When the mold is opened, it moves synchronously with the large side fan (10). The linkage combination mold opening template (12) is set on the upper side of the small side fan (11), and drives the large side fan (10) and the small side fan (11) to move synchronously when the mold is closed and demolded.

5. The multidimensional composite piston mold opening and closing device according to claim 4, characterized in that, The linkage combination opening template (12) has an opening inside. A screw is provided on the upper side of the linkage combination opening template (12). The screw passes through the opening and passes through the linkage combination opening template (12) to the lower side and is fixedly connected to the large side fan (10). A nut is provided at the upper end of the screw. When the linkage combination opening template (12) rises, the nut is lifted to drive the large side fan (10) to rise. A bolt pressure sleeve is provided between the linkage combination opening template (12) and the large side fan (10) to evenly transmit the pressure of the small side fan (11) to the large side fan (10). A pin is provided inside the outer mold (8) to limit and guide the large side fan (10).

6. The multidimensional composite piston mold opening and closing device according to claim 4, characterized in that, The upper side of the T-shaped crossbeam (2), the outer sides of the two sets of outer molds (8) and the outer sides of the two sets of linkage combined opening templates (12) are all equipped with hydraulic cylinder systems to drive the components to move synchronously; the action sequence, speed and stroke of the multiple hydraulic cylinder systems are controlled by the PLC system.

7. The multidimensional composite piston mold opening and closing device according to claim 2, characterized in that, The pressing component (7) further includes: T-shaped plate (701), which is located on the lower side of the middle fan connecting seat (5); The connector (702) is symmetrically arranged on the lower side of the T-shaped plate (701), with its upper surface connected to the T-shaped plate (701) and its lower surface connected to the middle fan (601); The U-shaped part (704) is slidably disposed on the lower side of the T-shaped plate (701); the elastic part (706) is disposed on the lower side of the U-shaped part (704) and its lower end is connected to the locking block (13). When demolding, the elastic part (706) presses down on the locking block (13).

8. The multidimensional composite piston mold opening and closing device according to claim 7, characterized in that, The pressing component (7) further includes: A movable component (705) is disposed inside the U-shaped component (704) and is used to drive the U-shaped component (704) to move; The fixing member (703) is located on the upper side of the middle fan (601), and its upper surface is a wedge-shaped surface, which is used to drive the moving member (705) to move laterally; The reset component (708) is symmetrically arranged on the side of the T-shaped plate (701) and has elasticity, and is used to drive the U-shaped component (704) to reset laterally; The limiting groove (707) is located on the side of the middle fan edge (602). When the middle fan edge (602) and the middle fan center (601) crack, the locking block (13) enters the limiting groove (707) and drives the middle fan edge (602) to move synchronously with the middle fan center (601).

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