A parting mechanism of a die-casting mold

Abstract

The utility model discloses a kind of anti-flying material's die-casting die parting mechanism, it is related to casting;Powder metallurgy technical field.The anti-flying material's die-casting die parting mechanism, including workbench, the downside of workbench is fixedly connected with support leg, the upside of workbench is fixedly connected with fixed frame, the upside of fixed frame is fixedly connected with fixed plate, the downside of fixed plate is installed with fixed mould, the downside of fixed mould is installed with movable mould, the upside of movable mould is equipped with cavity, the upside of fixed plate is installed with sprue pipe, the lower end of sprue pipe is slidably penetrated through fixed plate, the lower end of sprue pipe is penetrated through fixed mould, sealing mechanism is set on fixed mould and movable mould, by setting emergency blocking ring, ladder sealing ring, wedge-shaped convex ring and corresponding emergency recess, ladder recess, wedge-shaped recess on fixed mould cooperation, form three sealed barriers, block the path of aluminum liquid to the outside of mould leakage, the reliability of multiple layer sealing structure improves, effectively prevent aluminum liquid leakage splash.

Description

Technical Field

[0001] This utility model relates to the field of casting and powder metallurgy technology, specifically to a die-casting mold parting mechanism that prevents material from flying out. Background Technology

[0002] In modern manufacturing, aluminum alloy die casting is widely used in the automotive, electronics and other fields due to its advantages of lightweight, high strength and mass production. The parting mechanism of the die casting mold is the core component that controls the opening and closing of the mold and ensures the quality of the casting. Its sealing performance directly determines the production efficiency and product qualification rate. Most of the current mainstream aluminum alloy die casting molds adopt a single parting surface structure with a central gate design, and achieve cavity closure through the fit of the fixed mold and the moving mold.

[0003] The existing parting mechanism has a simple sealing design, which mostly relies on the static fit of a single convex ring or ordinary sealing ring. During the aluminum alloy die casting process, the mold is easily deformed by the high temperature of the molten metal of about 660°C, which leads to an increase in the sealing gap of the parting surface. Although the impact pressure of the molten metal on the parting surface is low under the low-pressure injection process, long-term action will still cause ordinary sealing rings to age and fail, which will lead to the phenomenon of flying material. This will cause the flash tolerance of the casting to exceed the tolerance, making it difficult to control it stably within ≤0.05mm, and increasing the porosity. At the same time, flying material will also increase the workload of mold cleaning and reduce production efficiency. Utility Model Content

[0004] The purpose of this invention is to at least solve one of the technical problems existing in the prior art, and to provide a die-casting mold parting mechanism that prevents flying material, forming a multi-layer sealing barrier to block the path of aluminum liquid leakage to the outside of the mold. The multi-layer sealing structure improves the reliability of the seal and effectively prevents aluminum liquid leakage and splashing.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a die-casting mold parting mechanism for preventing flying material, including a worktable, a support leg fixedly connected to the lower side of the worktable, a fixed frame fixedly connected to the upper side of the worktable, and a fixed plate fixedly connected to the upper side of the fixed frame; A fixed mold is installed on the lower side of the fixed plate, a moving mold is installed on the lower side of the fixed mold, and a cavity is opened on the upper side of the moving mold; A hydraulic cylinder is fixedly connected to the lower side of the workbench. The extension rod of the hydraulic cylinder slides through the workbench, and the upper end of the extension rod is fixedly connected to the base plate. A sprue is installed on the upper side of the fixed plate. The lower end of the sprue slides through the fixed plate and passes through the fixed mold. The sprue is fixedly connected to the fixed mold. Sealing mechanisms are provided on the fixed mold and the moving mold. The sealing mechanism includes an emergency blocking ring, a stepped sealing ring, a wedge-shaped convex ring, an emergency groove, a stepped groove, a wedge-shaped groove, eight ejector pin grooves, eight electric ejector pins, eight ejector block grooves, eight sealing ring grooves, eight ejector blocks, and eight sealing rings.

[0006] Preferably, a fixing ring is fixedly connected to the outer surface of both the fixed mold and the moving mold, and bolts are installed on both fixing rings. A base plate is installed on the lower side of the moving mold. The retaining ring on the outer surface of the moving mold is connected to the base plate by bolts, and the retaining ring on the outer surface of the fixed mold is connected to the fixed plate by bolts.

[0007] Preferably, the moving mold has cooling water channels inside, and a water outlet pipe is fixedly connected to the front side of the moving mold; The rear side of the moving mold is fixedly connected to a water inlet pipe, and both the water inlet pipe and the water outlet pipe are connected to the interior of the cooling water channel.

[0008] Preferably, the emergency blocking ring is fixedly connected to the upper side of the moving mold, and the stepped sealing ring is fixedly connected to the upper side of the moving mold; The stepped sealing ring is located on the outside of the emergency blocking ring, and the wedge-shaped convex ring is fixedly connected to the upper side of the moving mold.

[0009] Preferably, the wedge-shaped convex ring is located on the outer side of the stepped sealing ring, and the emergency groove is opened on the lower side of the fixed mold, and the emergency groove is adapted to the emergency blocking ring; The stepped groove is formed on the lower side of the fixed mold and is adapted to the stepped sealing ring. The wedge-shaped groove is formed on the lower side of the fixed mold and is adapted to the wedge-shaped convex ring.

[0010] Preferably, all eight ejector slots are formed on the bottom wall of the moving model cavity, the eight ejector slots are arranged in a circular array, and the eight electric ejector pins are respectively fixedly connected inside the eight ejector slots; All eight top block slots are located on the bottom wall of the moving model cavity, and the eight top block slots are coaxially arranged with the eight ejector pin slots.

[0011] Preferably, the interior of the top block groove is connected to the interior of the ejector pin groove, and eight sealing ring grooves are respectively formed on the bottom wall of the eight top block grooves; Eight top blocks are installed inside eight top block slots respectively, and the upper ends of eight electric ejector pins are fixedly connected to the eight top blocks respectively; Eight sealing rings are fixedly connected to the lower side of eight top blocks, and the eight sealing rings extend into the interior of eight sealing ring grooves.

[0012] Preferably, the emergency blocking ring is replaced with a four-segment emergency blocking ring, with each segment having the same arc length and a pre-reserved expansion gap between segments. At the same time, the integral emergency groove on the corresponding fixed mold is replaced with a four-segment emergency groove, while the rest of the mold structure remains unchanged.

[0013] Compared with the prior art, the beneficial effects of this utility model are: (1) The die-casting mold parting mechanism for preventing flying material forms three sealing barriers by setting an emergency blocking ring, a stepped sealing ring, and a wedge-shaped convex ring in conjunction with the corresponding emergency groove, stepped groove, and wedge-shaped groove on the fixed mold. The emergency blocking ring directly intercepts the aluminum liquid near the cavity, forming the first anti-leakage barrier. The stepped sealing ring undergoes elastic deformation under compression, filling the tiny gaps caused by mold processing errors or thermal deformation, forming the second auxiliary seal. The wedge-shaped convex ring and the wedge-shaped groove are tightly fitted under the action of the clamping force, forming the third main seal, blocking the path of aluminum liquid leakage to the outside of the mold. The multi-layer sealing structure improves the reliability of the seal and effectively prevents aluminum liquid leakage and splashing.

[0014] (2) The die-casting mold parting mechanism for preventing material flying has a sealing ring set on the lower side of the top block. When the mold is closed, the sealing ring is in close contact with the sealing ring groove to form an annular sealing band, which pre-blocks the leakage channel that may be generated by the gap between the ejector pin and the top block. Under the action of high pressure aluminum liquid, the sealing ring is squeezed by the pressure of aluminum liquid and generates a greater sealing force on the contact surface with the sealing ring groove. At the same time, the sealing ring itself elastically deforms to fill the gap, forming a self-reinforcing effect of the greater the pressure and the tighter the seal, which completely blocks the path of aluminum liquid leakage from the ejector pin hole and further improves the sealing performance of the mold. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the parting mechanism of a die-casting mold for preventing material from flying out, according to this utility model. Figure 2 This is a schematic diagram of the cross-sectional connection structure between the fixed mold and the moving mold of this utility model; Figure 3 for Figure 2 Enlarged view of point A; Figure 4 for Figure 2 Enlarged view of point B; Figure 5 This is a schematic diagram of the connection structure on the lower side of the fixed mold of this utility model; Figure 6 This is a schematic diagram of the connection structure on the upper side of the moving mold of this utility model.

[0016] Reference numerals: 1. Workbench; 2. Support leg; 3. Fixing frame; 4. Fixing plate; 5. Fixed mold; 6. Moving mold; 7. Fixing ring; 8. Bolt; 9. Base plate; 10. Hydraulic cylinder; 11. Sprue pipe; 12. Emergency blocking ring; 13. Stepped sealing ring; 14. Wedge-shaped convex ring; 15. Emergency groove; 16. Stepped groove; 17. Wedge-shaped groove; 18. Cooling water channel; 19. Water inlet pipe; 20. Water outlet pipe; 21. Ejector pin groove; 22. Electric ejector pin; 23. Ejector block groove; 24. Sealing ring groove; 25. Ejector block; 26. Sealing ring. Detailed Implementation

[0017] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0018] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0019] In the description of this utility model, terms such as greater than, less than, and exceeding are understood to exclude the stated number, while terms such as above, below, and within are understood to include the stated number. The use of terms like "first" and "second" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the quantity or sequence of the indicated technical features.

[0020] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0021] Please see Figure 1-6 This utility model provides a new technical solution: a die-casting mold parting mechanism to prevent flying material, including a worktable 1: the worktable 1 is the basic load-bearing structure of the die-casting mold parting mechanism, the lower side of the worktable 1 is fixedly connected to the support leg 2 and the hydraulic cylinder 10, the upper side of the worktable 1 is fixedly connected to the fixing frame 3, and a through hole is opened in the middle of the worktable 1 for the telescopic rod of the hydraulic cylinder 10 to slide through. The worktable 1 bears the weight of all the upper components through its own structure.

[0022] Support leg 2: Support leg 2 is fixedly connected to the lower side of the workbench 1. The lower end of support leg 2 is in contact with the ground. Support leg 2 is used to support the workbench 1. Support leg 2 keeps a certain gap between the workbench 1 and the ground to prevent the workbench 1 from directly contacting the ground and getting damp or worn.

[0023] Fixed frame 3: Fixed frame 3 is fixedly connected to the upper side of workbench 1. Fixed plate 4 is fixedly connected to the upper side of fixed frame 3. Fixed frame 3 supports fixed plate 4 and fixed mold 5 in the air through its own structure. Fixed frame 3 reserves vertical space for the lifting and lowering of moving mold 6 to ensure that moving mold 6 can smoothly approach or move away from fixed mold 5.

[0024] Fixed plate 4: Fixed plate 4 is fixedly connected to the upper side of fixed frame 3. Fixed mold 5 is installed on the lower side of fixed plate 4. Fixed plate 4 is fixedly connected to fixed mold 5 through fixed ring 7 and bolt 8 on the outer surface of fixed mold 5. A through hole is opened in the middle of fixed plate 4. The through hole is used for the lower end gap of sprue pipe 11 to pass through. Fixed plate 4 provides a stable installation base for fixed mold 5.

[0025] Fixed mold 5: Fixed mold 5 is installed on the lower side of fixed plate 4. Fixed ring 7 is fixedly connected to the outer surface of fixed mold 5. Fixed mold 5 is fixedly connected to fixed plate 4 through fixed ring 7 and bolt 8. The lower side of fixed mold 5 cooperates with the upper side of moving mold 6. When fixed mold 5 and moving mold 6 are closed, they together form a closed die-casting cavity. Emergency groove 15, stepped groove 16 and wedge groove 17 are opened on the lower side of fixed mold 5. Emergency groove 15 is used to cooperate with emergency blocking ring 12, stepped groove 16 is used to cooperate with stepped sealing ring 13, and wedge groove 17 is used to cooperate with wedge convex ring 14.

[0026] Moving mold 6: Moving mold 6 is installed on the lower side of fixed mold 5. A cavity is opened on the upper side of moving mold 6. This cavity is the space for aluminum liquid forming. A fixing ring 7 is fixedly connected to the outer surface of moving mold 6. Moving mold 6 is fixedly connected to base plate 9 through fixing ring 7 and bolts 8. An emergency blocking ring 12, a stepped sealing ring 13, and a wedge-shaped convex ring 14 are fixedly connected to the upper side of moving mold 6. Cooling water channel 18, ejector pin groove 21, and ejector block groove 23 are opened inside moving mold 6. Moving mold 6 can be raised and lowered under the drive of hydraulic cylinder 10 to realize the opening and closing action with fixed mold 5.

[0027] Fixed ring 7: There are two fixed rings 7. The two fixed rings 7 are fixedly connected to the outer surfaces of the fixed mold 5 and the moving mold 6 respectively. Bolt holes are opened on the fixed rings 7. The fixed ring 7 on the outer surface of the fixed mold 5 is connected to the fixed plate 4 by bolts 8. The fixed ring 7 on the outer surface of the moving mold 6 is connected to the base plate 9 by bolts 8. The fixed rings 7 increase the connection contact area to make the force on the fixed mold 5 and the moving mold 6 more uniform, and avoid the fixed mold 5 and the moving mold 6 directly deformed by force.

[0028] Bolt 8: Bolt 8 is installed in the bolt holes of the two fixing rings 7. Bolt 8 locks the fixing ring 7 on the outer surface of the fixed mold 5 to the fixing plate 4, and bolt 8 locks the fixing ring 7 on the outer surface of the moving mold 6 to the base plate 9. Bolt 8 achieves the fixed connection between the fixed mold 5 and the fixing plate 4, and between the moving mold 6 and the base plate 9 through its own preload, ensuring that the fixed mold 5 and the moving mold 6 do not undergo relative displacement during operation.

[0029] Base plate 9: Base plate 9 is installed on the lower side of moving mold 6. The upper side of base plate 9 is connected to the fixing ring 7 on the outer surface of moving mold 6 by bolt 8. The lower side of base plate 9 is fixedly connected to the telescopic rod of hydraulic cylinder 10. Base plate 9 receives the power transmitted by the telescopic rod of hydraulic cylinder 10. Base plate 9 drives moving mold 6 to rise and fall synchronously, realizing the opening and closing action of moving mold 6 and fixed mold 5.

[0030] Hydraulic cylinder 10: The hydraulic cylinder 10 is fixedly connected to the lower side of the workbench 1. The telescopic rod of the hydraulic cylinder 10 slides through the through hole of the workbench 1. The upper end of the telescopic rod of the hydraulic cylinder 10 is fixedly connected to the base plate 9. The hydraulic cylinder 10 drives the base plate 9 to rise or fall through the telescopic movement of the telescopic rod, thereby driving the moving mold 6 to approach or move away from the fixed mold 5, providing power for the opening and closing of the mold.

[0031] Sprue 11: Sprue 11 is installed on the upper side of fixed plate 4. The lower end of sprue 11 passes through the through hole of fixed plate 4. The lower end of sprue 11 passes through fixed mold 5 and is fixedly connected to fixed mold 5. The interior of sprue 11 is a hollow channel. This channel is used to transport external aluminum liquid to the cavity formed by the mold 5 and moving mold 6. It is the only channel for aluminum liquid to enter the cavity.

[0032] Emergency blocking ring 12: The emergency blocking ring 12 is fixedly connected to the upper side of the moving mold 6. The emergency blocking ring 12 is located outside the cavity of the moving mold 6 and close to the cavity. When the moving mold 6 and the fixed mold 5 are closed, the emergency blocking ring 12 is embedded in the emergency groove 15. The emergency blocking ring 12 is used to directly intercept the aluminum liquid approaching the cavity, forming the first anti-leakage barrier and reducing the impact of aluminum liquid on the external sealing structure.

[0033] Stepped sealing ring 13: Stepped sealing ring 13 is fixedly connected to the upper side of the moving mold 6. Stepped sealing ring 13 is located outside the emergency blocking ring 12. Stepped sealing ring 13 is embedded in the stepped groove 16 when the moving mold 6 and the fixed mold 5 are closed. Stepped sealing ring 13 is made of elastic material, preferably fluororubber or metal-coated rubber. When the stepped sealing ring 13 is squeezed, it can fill the tiny gaps caused by processing errors or thermal deformation, forming a second auxiliary seal to prevent the aluminum liquid from spreading to the outside.

[0034] Wedge-shaped protruding ring 14: The wedge-shaped protruding ring 14 is fixedly connected to the upper side of the moving mold 6. The wedge-shaped protruding ring 14 is located outside the stepped sealing ring 13. When the moving mold 6 and the fixed mold 5 are closed, the wedge-shaped protruding ring 14 is embedded in the wedge-shaped groove 17. The cross section of the wedge-shaped protruding ring 14 is wedge-shaped. The wedge-shaped surface of the wedge-shaped protruding ring 14 and the wedge-shaped surface of the wedge-shaped groove 17 are tightly fitted under the action of the clamping force to form the third main seal, blocking the leakage path of aluminum liquid to the outside of the mold.

[0035] Emergency groove 15: The emergency groove 15 is formed on the lower side of the fixed mold 5. The position of the emergency groove 15 corresponds to the emergency blocking ring 12. The shape of the emergency groove 15 is adapted to the emergency blocking ring 12. The emergency groove 15 accommodates the emergency blocking ring 12 when the mold is closed, so that the emergency blocking ring 12 can fit tightly with the emergency groove 15 to ensure the effectiveness of the first seal.

[0036] Stepped groove 16: Stepped groove 16 is formed on the lower side of fixed mold 5. The position of stepped groove 16 corresponds to stepped sealing ring 13. The shape of stepped groove 16 is adapted to stepped sealing ring 13. Stepped groove 16 accommodates stepped sealing ring 13 when the mold is closed, providing extrusion space for stepped sealing ring 13, so that stepped sealing ring 13 can achieve sealing through elastic deformation.

[0037] Wedge-shaped groove 17: The wedge-shaped groove 17 is formed on the lower side of the fixed mold 5. The position of the wedge-shaped groove 17 corresponds to the wedge-shaped convex ring 14. The shape of the wedge-shaped groove 17 is adapted to the wedge-shaped convex ring 14. The wedge-shaped surface of the wedge-shaped groove 17 and the wedge-shaped surface of the wedge-shaped convex ring 14 cooperate to enhance the tightness of the fit through the clamping force, thus ensuring the reliability of the main seal.

[0038] Cooling channel 18: The cooling channel 18 is located inside the moving mold 6. The cooling channel 18 is spirally distributed inside the moving mold 6. The two ends of the cooling channel 18 are connected to the inlet pipe 19 and the outlet pipe 20, respectively. The cooling channel 18 is used to circulate coolant. When the coolant flows in the cooling channel 18, it absorbs the heat of the moving mold 6, reduces the temperature of the moving mold 6 during the die casting process, and prevents the moving mold 6 from deforming due to overheating.

[0039] Water inlet pipe 19: Water inlet pipe 19 is fixedly connected to the rear side of moving mold 6. One end of water inlet pipe 19 is connected to the external cooling system, and the other end of water inlet pipe 19 is connected to the interior of cooling water channel 18. Water inlet pipe 19 is used to transport external coolant to the cooling water channel 18 to provide cooling medium for the cooling system.

[0040] Water outlet pipe 20: Water outlet pipe 20 is fixedly connected to the front side of the moving mold 6. One end of water outlet pipe 20 is connected to the inside of cooling water channel 18, and the other end of water outlet pipe 20 is connected to the external cooling system. Water outlet pipe 20 is used to discharge the coolant after absorbing heat from the cooling water channel 18 to realize the circulation of coolant.

[0041] Ejector slots 21: There are eight ejector slots 21 in total. All eight ejector slots 21 are opened on the bottom wall of the cavity of the moving mold 6. The eight ejector slots 21 are arranged in a ring array. The ejector slots 21 are used to install electric ejector pins 22. The ejector slots 21 provide fixed space and axial movement guidance for the electric ejector pins 22, ensuring that the electric ejector pins 22 can extend and retract stably along a straight line.

[0042] Electric ejector pins 22: There are eight electric ejector pins 22 in total. The eight electric ejector pins 22 are fixedly connected inside the eight ejector pin slots 21 respectively. The upper end of the electric ejector pin 22 is fixedly connected to the ejector block 25. The electric ejector pin 22 drives the ejector block 25 to rise or fall through its own telescopic movement, so as to realize the demolding action of the casting. The electric ejector pin 22 adopts DC servo drive, with a rated thrust of 50-80N and a maximum telescopic stroke of 15-20mm.

[0043] Ejector slots 23: There are eight ejector slots 23 in total. All eight ejector slots 23 are opened on the bottom wall of the cavity of the moving mold 6. The eight ejector slots 23 are coaxially arranged with the eight ejector pin slots 21 and are internally connected. The ejector slots 23 are used to accommodate the ejector block 25. The ejector slots 23 provide the ejector block 25 with movement space and axial guidance to ensure that the ejector block 25 rises and falls stably along a straight line.

[0044] Sealing ring groove 24: There are eight sealing ring grooves 24 in total. The eight sealing ring grooves 24 are respectively opened on the bottom wall of the eight top block grooves 23. The sealing ring grooves 24 are used to accommodate the sealing rings 26 and provide installation space for the sealing rings 26, so that the sealing rings 26 can cooperate with the top blocks 25 to form an annular sealing band.

[0045] Ejector block 25: There are eight ejector blocks 25 in total. The eight ejector blocks 25 are installed inside the eight ejector block slots 23 respectively. The lower end of the ejector block 25 is fixedly connected to the electric ejector pin 22. The lower side of the ejector block 25 is fixedly connected to the sealing ring 26. When the ejector block 25 rises under the drive of the electric ejector pin 22, it directly contacts the casting and ejects the casting out of the cavity to achieve demolding. When the ejector block 25 moves, it drives the sealing ring 26 to move synchronously.

[0046] Sealing ring 26: There are eight sealing rings 26 in total. The eight sealing rings 26 are fixedly connected to the lower side of the eight top blocks 25 respectively. The eight sealing rings 26 extend into the interior of the eight sealing ring grooves 24 respectively. The sealing rings 26 are made of elastic material. The sealing rings 26 are always in contact with the wall of the sealing ring groove 24 during the mold closing and demolding process. The sealing rings 26 are used to seal the gap between the top block 25 and the top block groove 23 to prevent aluminum liquid or aluminum dross from leaking into the interior of the moving mold 6.

[0047] Furthermore, the workbench 1 is stably supported by the support legs 2, the fixed frame 3 supports the fixed plate 4, and the fixed mold 5 is fixed to the fixed plate 4 by the fixing ring 7 and bolts 8 on the outer surface. When the hydraulic cylinder 10 is activated, its telescopic rod slides upward along the through hole of the workbench 1, which drives the base plate 9 fixed to the telescopic rod to rise. The base plate 9 drives the moving mold 6 to move upward by the fixing ring 7 and bolts 8 on the outer surface of the moving mold 6 until the moving mold 6 and the fixed mold 5 are completely in contact.

[0048] The emergency blocking ring 12 on the upper side of the moving mold 6 is embedded in the emergency groove 15 on the lower side of the fixed mold 5, forming the first near-cavity leakage interception barrier, directly blocking the aluminum liquid from penetrating to the parting surface. The stepped sealing ring 13 on the upper side of the moving mold 6 is embedded in the stepped groove 16 of the fixed mold 5. The sealing ring is compressed and undergoes elastic deformation, filling the tiny gaps caused by mold processing errors or thermal deformation, forming the second auxiliary seal. The wedge-shaped protrusion ring 14 on the upper side of the moving mold 6 is embedded in the wedge-shaped groove 17 of the fixed mold 5. The wedge-shaped surface fits tightly under the action of the clamping force, forming the third main seal, blocking the path of aluminum liquid leakage to the outside of the mold.

[0049] The eight ejector block grooves 23 on the bottom wall of the cavity of the moving mold 6 are coaxially connected with the ejector pin groove 21. The ejector block 25 is installed in the ejector block groove 23, and the sealing ring 26 on its lower side naturally extends into the sealing ring groove 24. When the mold is closed, the ejector block 25 fits against the inner wall of the ejector block groove 23, and the sealing ring 26 is in close contact with the bottom wall and side wall of the sealing ring groove 24 to form an annular sealing strip, which pre-seals the leakage channels that may be generated by the movement gap between the ejector pin and the ejector block.

[0050] Molten aluminum is injected through the sprue pipe 11 on the upper side of the fixed plate 4. After the gap at the lower end of the sprue pipe 11 passes through the fixed plate 4, it passes through and is fixed to the fixed mold 5, accurately guiding the molten aluminum into the cavity on the upper side of the moving mold 6. The cavity forms a closed space after the fixed mold 5 and the moving mold 6 are closed. When the molten aluminum is subjected to high pressure in the cavity, the hard contact between the emergency blocking ring 12 and the emergency groove 15 directly bears the impact force of the molten aluminum near the cavity side, intercepting the slight penetration of molten aluminum. The stepped sealing ring 13 is further compressed in the stepped groove 16, using elasticity to compensate for the micro deformation of the mold caused by high pressure, preventing the molten aluminum from spreading to the outside. The wedge-shaped convex ring 14 and the wedge-shaped groove 17 fit more tightly under the clamping force, and the radial impact of the molten aluminum is offset by the inclined plane component force, ensuring that the main seal does not fail.

[0051] High-pressure molten aluminum may seep into the ejector pin groove 21 through the gap between the top block 25 and the top block groove 23. At this time, the sealing ring 26 is squeezed by the pressure of the molten aluminum, and the contact surface with the sealing ring groove 24 generates a greater sealing force. At the same time, the sealing ring itself elastically deforms to fill the gap, forming a self-reinforcing effect that the greater the pressure, the tighter the seal, completely blocking the path of molten aluminum leakage from the ejector pin hole.

[0052] Coolant is introduced into the cooling water channel 18 inside the moving mold 6 through the rear water inlet pipe 19. After flowing through the water channel, the coolant is discharged from the front water outlet pipe 20, which quickly reduces the temperature of the moving mold 6. Stable temperature control prevents the mold from deforming excessively due to thermal expansion and contraction, ensuring that the fit clearance between the emergency blocking ring 12, the stepped sealing ring 13, the wedge-shaped convex ring 14 and the corresponding groove is stable within the design range, maintaining the sealing performance of the parting surface, preventing the ejector block groove 23 and the sealing ring groove 24 from having dimensional deviations due to temperature fluctuations, ensuring the fitting accuracy between the sealing ring 26 and the sealing ring groove 24, and ensuring the continuity of the ejector pin hole seal.

[0053] After die casting is completed, the hydraulic cylinder 10 retracts its telescopic rod, causing the base plate 9 and the moving mold 6 to move downwards. The fixed mold 5 separates from the moving mold 6, and the emergency blocking ring 12, the stepped sealing ring 13, and the wedge-shaped convex ring 14 are respectively dislodged from the emergency groove 15, the stepped groove 16, and the wedge-shaped groove 17. The eight ejector pins 22 are fixed in the eight ejector pin grooves 21 on the bottom wall of the cavity of the moving mold 6. The ejector pin grooves 21 cooperate with the coaxial ejector block grooves 23. The electric ejector pins 22 extend upwards, pushing the ejector block 25 in the ejector block groove 23 to rise and eject the casting in the cavity. At this time, the sealing ring 26 on the lower side of the ejector block 25 moves synchronously in the sealing ring groove 24. Through the fit between the sealing ring 26 and the sealing ring groove 24, aluminum slag or residual aluminum liquid is prevented from leaking from the gap between the ejector pin groove 21 and the ejector block groove 23, ensuring the sealing of the demolding process.

[0054] Example: Adapted for high-temperature die-casting scenarios Please see Figure 5 and Figure 6 The original integral ring emergency blocking ring 12 on the moving mold 6 is replaced with a four-segment emergency blocking ring 12, with each segment having the same arc length and a pre-reserved expansion gap between segments. At the same time, the integral emergency groove 15 on the fixed mold 5 is replaced with a four-segment emergency groove 15, while the rest of the mold structure remains unchanged. After replacing it with a four-segment emergency blocking ring 12, during high-temperature die casting operations: In the mold closing stage, the four-segment emergency blocking ring 12 will rise with the moving mold 6, precisely aligning and fitting with the four-segment emergency groove 15 of the fixed mold 5, together forming the first sealing barrier close to the cavity. During the die casting process, when the high-temperature aluminum liquid is injected, causing the mold temperature to rise, the four-segment emergency blocking ring 12 will generate thermal expansion. At this time, the expansion gap reserved between the segments will accommodate the expansion, preventing the emergency blocking ring 12 and the emergency groove 15 from getting stuck due to expansion and squeezing. In the mold opening stage, the hydraulic cylinder drives the moving mold 6 to descend, and the four-segment emergency blocking ring 12 moves down synchronously with the moving mold 6. Each segment of the emergency blocking ring 12 can be independently removed from the corresponding emergency groove 15, and the mold opening action will not be affected by the jamming caused by the overall expansion. Benefits of replacement Solving the problem of mold opening jamming at high temperatures: Avoiding the situation where the original integral ring blocking ring easily gets stuck in the groove due to high temperature expansion, the mold opening process is smooth and there is no mold jamming phenomenon, reducing production interruptions caused by mold jamming and improving the continuity of operation in high temperature die casting scenarios; Ensuring stable sealing performance: After the four-section blocking ring is fitted, it can still form a continuous near-cavity interception barrier, which can effectively prevent aluminum liquid from penetrating to the parting surface. The anti-flying effect is consistent with the original integral blocking ring, and does not affect the die casting quality. Extended component lifespan: The segmented structure avoids the problem of easy breakage of the original integral ring blocking ring due to local stress concentration, reduces the frequency of blocking ring replacement, lowers mold maintenance costs, and is suitable for long-term operation requirements in high-temperature die casting scenarios.

[0055] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A die casting mold parting mechanism for preventing flying material, comprising a worktable (1), a support leg (2) fixedly connected to the lower side of the worktable (1), a fixed frame (3) fixedly connected to the upper side of the worktable (1), and a fixed plate (4) fixedly connected to the upper side of the fixed frame (3). A fixed mold (5) is installed on the lower side of the fixed plate (4), a moving mold (6) is installed on the lower side of the fixed mold (5), and a cavity is opened on the upper side of the moving mold (6); A hydraulic cylinder (10) is fixedly connected to the lower side of the workbench (1). The telescopic rod of the hydraulic cylinder (10) slides through the workbench (1). The upper end of the telescopic rod of the hydraulic cylinder (10) is fixedly connected to the base plate (9). A sprue pipe (11) is installed on the upper side of the fixed plate (4). The lower end of the sprue pipe (11) slides through the fixed plate (4) and passes through the fixed mold (5). The sprue pipe (11) and the fixed mold (5) are fixedly connected. The feature is that: The fixed mold (5) and the moving mold (6) are provided with sealing mechanisms; The sealing mechanism includes an emergency blocking ring (12), a stepped sealing ring (13), a wedge-shaped convex ring (14), an emergency groove (15), a stepped groove (16), a wedge-shaped groove (17), eight ejector pin grooves (21), eight electric ejector pins (22), eight ejector block grooves (23), eight sealing ring grooves (24), eight ejector blocks (25), and eight sealing rings (26).

2. The die-casting mold parting mechanism for preventing material flying as described in claim 1, characterized in that: Fixed rings (7) are fixedly connected to the outer surfaces of the fixed mold (5) and the moving mold (6), and bolts (8) are installed on both fixed rings (7). A base plate (9) is installed on the lower side of the moving mold (6). The fixing ring (7) on the outer surface of the moving mold (6) is connected to the base plate (9) by bolts (8), and the fixing ring (7) on the outer surface of the fixed mold (5) is connected to the fixing plate (4) by bolts (8).

3. The die-casting mold parting mechanism for preventing material flying as described in claim 1, characterized in that: The moving mold (6) has a cooling water channel (18) inside, and a water outlet pipe (20) is fixedly connected to the front side of the moving mold (6). The rear side of the moving mold (6) is fixedly connected to a water inlet pipe (19), and both the water inlet pipe (19) and the water outlet pipe (20) are connected to the interior of the cooling water channel (18).

4. The die-casting mold parting mechanism for preventing material flying as described in claim 1, characterized in that: The emergency blocking ring (12) is fixedly connected to the upper side of the moving mold (6), and the stepped sealing ring (13) is fixedly connected to the upper side of the moving mold (6); The stepped sealing ring (13) is located on the outside of the emergency blocking ring (12), and the wedge-shaped convex ring (14) is fixedly connected to the upper side of the moving mold (6).

5. The die-casting mold parting mechanism for preventing material flying as described in claim 4, characterized in that: The wedge-shaped protruding ring (14) is located on the outside of the stepped sealing ring (13), and the emergency groove (15) is opened on the lower side of the fixed mold (5). The emergency groove (15) is adapted to the emergency blocking ring (12). The stepped groove (16) is opened on the lower side of the fixed mold (5), and the stepped groove (16) is adapted to the stepped sealing ring (13). The wedge-shaped groove (17) is opened on the lower side of the fixed mold (5), and the wedge-shaped groove (17) is adapted to the wedge-shaped protrusion ring (14).

6. The die-casting mold parting mechanism for preventing material flying as described in claim 1, characterized in that: The eight ejector slots (21) are all opened on the bottom wall of the cavity of the moving mold (6). The eight ejector slots (21) are arranged in a ring array. The eight electric ejector pins (22) are fixedly connected to the inside of the eight ejector slots (21). The eight ejector slots (23) are all opened on the bottom wall of the cavity of the moving mold (6), and the eight ejector slots (23) are coaxially arranged with the eight ejector pin slots (21).

7. The die-casting mold parting mechanism for preventing material flying as described in claim 6, characterized in that: The interior of the top block groove (23) is connected to the interior of the ejector pin groove (21), and eight sealing ring grooves (24) are respectively opened on the bottom wall of the eight top block grooves (23); Eight top blocks (25) are respectively installed inside eight top block slots (23), and the upper ends of eight electric ejector pins (22) are respectively fixedly connected to the eight top blocks (25); Eight sealing rings (26) are fixedly connected to the lower side of eight top blocks (25), and the eight sealing rings (26) extend into the interior of eight sealing ring grooves (24).

8. The die-casting mold parting mechanism for preventing material flying as described in claim 4, characterized in that: The emergency blocking ring (12) is replaced with a four-segment emergency blocking ring (12), and the emergency groove (15) on the corresponding fixed mold (5) is replaced with a four-segment emergency groove (15). The rest of the mold structure remains unchanged.

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