Front end cover smooth surface forming die and forming method thereof

Abstract

The present application relates to the technical field of part casting mold, disclose a front end cover smooth forming mold and its forming method, including with convex rectangular core one-to-one corresponding runner, the liquid aluminum can directly reach the area where the convex rectangular core is located, the liquid aluminum can climb over the convex rectangular core with sufficient kinetic energy, reduces the area due to the kinetic energy of the liquid aluminum is insufficient and causes the filling incomplete condition; part of the liquid aluminum can flow into the forming cavity from both sides of the convex rectangular core with high kinetic energy, reduces the filling of the liquid aluminum after filling the convex rectangular core again fills other areas, because the kinetic energy decreases, leading to other areas appear filling incomplete condition. When the two streams of liquid aluminum flowing along the concave circular ring cavity flow into contact with the liquid aluminum flowing along the transition channel, it will flow away from the runner along with the liquid aluminum flowing along the transition channel, reducing the stagnation and backflow of the two streams of liquid aluminum flowing along the concave circular ring cavity at the intersection, reducing the impurities left in the stagnation area and the product inside.

Description

Technical Field

[0001] This invention relates to the technical field of parts casting molds, specifically to a front end cover smooth surface forming mold and its forming method. Background Technology

[0002] Casting, as a fundamental process in the field of mechanical manufacturing, is based on the principle of using the fluidity of molten metal to inject high-temperature and high-pressure molten metal into the forming cavity formed by the closing of the moving mold and the fixed mold. After the molten metal has cooled and solidified, the required parts or blanks can be obtained.

[0003] In the mass production of the front cover of the housing, the mold consists of a fixed mold and a moving mold. The fixed mold has a fixed forming part, and the moving mold has a moving forming part. When the fixed mold and the moving mold are closed, the fixed forming part and the moving forming part together enclose and form a molding cavity that matches the front cover of the housing. See also Figure 1 and Figure 2 As shown, the front cover of the housing produced by our company has the following structural features: a circular through hole 1 is located in the center; on one side of the front cover, there is a concave ring 2 that is recessed inward and a convex ring 3 that is raised upward around the concave ring 2; on the other side of the front cover (i.e. the back of the convex ring 3), ten rectangular grooves 4 are distributed around the circumference of the convex ring 3.

[0004] To accommodate the aforementioned structure of the front end cover of the casting molding machine housing, the molding cavity was designed accordingly: the circular through hole 1 at the center of the product was formed by a cylindrical core on the moving mold; the concave ring 2 on one side of the product was formed by a convex ring core on the moving mold; the convex ring 3 on one side of the product was formed by a concave ring cavity on the moving mold; the ten rectangular grooves 4 on the other side of the product were formed by ten convex rectangular cores on the fixed mold; one end of the fixed mold was provided with a gate for conveying molten aluminum into the molding cavity, wherein six convex rectangular cores were positioned close to the gate, and the other four convex rectangular cores were positioned in the opposite area of ​​the gate.

[0005] After the molten aluminum enters the forming cavity, the frontmost portion of the molten aluminum comes into contact with the inner wall of the forming cavity first. Its temperature drops sharply, forming a semi-solid or solid metal shell. Due to its different shape, solid impurities in the molten aluminum cannot integrate into the metal shell and instead accumulate towards the front end of the molten aluminum. To reduce the impurity content in the finished product, the fixed mold has a slag-collecting groove at the end of the molten aluminum flow path, and the moving mold has a moving slag-collecting groove at the end of the molten aluminum flow path. When the fixed and moving molds are closed, the fixed and moving slag-collecting grooves together form a slag-collecting chamber for collecting impurities in the molten aluminum.

[0006] During the die-casting process of the front cover of the housing, molten aluminum enters the mold cavity through the gate. Upon entering the cavity, the molten aluminum is immediately diverted by the convex annular core and flows forward along the concave annular cavity. After the two streams of molten aluminum complete one revolution around the concave annular cavity, they converge at the end of the cavity furthest from the gate. After the two streams converge, their kinetic energy cancels each other out, causing a decrease in the flow velocity in that area. This results in some impurities that were moving with the leading edge of the molten aluminum becoming trapped at the confluence point. The converged molten aluminum is also prone to turbulence and backflow, which carries some impurities from the leading edge of the molten aluminum into the interior of the mold cavity. These impurity retention and backflow phenomena occur at the confluence point or in the middle area inside the mold cavity, rather than at the end of the flow path. Therefore, the slag trap cannot collect these impurities, ultimately leading to impurities being sealed inside the product, increasing the internal defect rate of the molded product and affecting the product yield.

[0007] As molten aluminum flows within the forming cavity, its kinetic energy is continuously consumed as the flow distance increases. By the time the molten aluminum reaches a portion of the convex rectangular core, its kinetic energy has often diminished, leading to incomplete filling and localized defects in that area. Furthermore, after the molten aluminum is fully filled, it requires sufficient cooling and solidification before the mold can be opened and the part removed. Because the front cover of the housing produced by our company has a convex ring 3, which is relatively thick, the cooling and solidification time required at this point is longer, thus reducing production efficiency. Summary of the Invention

[0008] The present invention aims to provide a front end cover forming mold and its forming method, which can reduce the retention and backflow of impurities inside the cavity and the situation of incomplete filling due to insufficient kinetic energy of aluminum liquid, while improving the efficiency of aluminum liquid cooling and solidification.

[0009] To achieve the above objectives, the present invention adopts the following technical solution: 1) A front end cover smooth surface forming mold, comprising a fixed mold and a movable mold movable along a direction approaching or away from the fixed mold. The fixed mold has a fixed forming part on the side facing the movable mold, and the movable mold has a movable forming part on the side facing the fixed mold. The fixed forming part and the movable forming part can together enclose and form a forming cavity for receiving molten aluminum and cooling it for forming. The movable forming part includes a cylindrical core for forming a circular through hole in the front end cover, a convex annular core for forming a concave annular hole in the front end cover, and a concave annular cavity for forming a convex annular hole in the front end cover, which are sequentially surrounded by the cylindrical core. The fixed forming part includes a convex rectangular core for forming a rectangular groove in the front end cover. The fixed mold has a part communicating with the fixed forming part for... The feeding structure for injecting molten aluminum into the forming cavity has several flow channels on the fixed mold for the molten aluminum to flow through and communicate with the feeding structure. The ends of the flow channels away from the feeding structure are connected to the fixed forming part. The flow channels correspond one-to-one with the convex rectangular cores that are close to the feeding structure. The flow channels are used to guide the molten aluminum to the convex rectangular cores and the areas on both sides of the convex rectangular cores. The top of the cylindrical core has a transition groove for the molten aluminum to pass through. The side opening of the transition groove corresponds to the area between two adjacent convex rectangular cores. The moving mold and the fixed mold are respectively provided with a first cooling structure and a second cooling structure for cooling the molten aluminum in the forming cavity. The moving mold is provided with a point cooling structure for cooling the molten aluminum in the concave annular cavity area.

[0010] In this invention, molten aluminum enters the flow channel through the feeding structure. The flow channel corresponds one-to-one with the convex rectangular cores near the feeding structure. Therefore, the molten aluminum can directly reach the area where these convex rectangular cores are located in the early stage of entering the forming cavity. At this time, the molten aluminum has high kinetic energy and good fluidity. The molten aluminum can climb and cross the convex rectangular cores with sufficient kinetic energy, thereby reducing the situation of incomplete filling in this area due to insufficient kinetic energy of the molten aluminum.

[0011] The flow channel is used to guide the molten aluminum to the convex rectangular core and its two sides near the feeding structure. After the molten aluminum enters the forming cavity through the flow channel, some of the molten aluminum can immediately flow from the two sides of the convex rectangular core near the feeding structure into the forming cavity. This part of the molten aluminum can flow to the convex rectangular cores in other areas of the forming cavity with high kinetic energy and fluidity, thereby reducing the situation where the convex rectangular cores in other areas are not fully filled due to the decrease in kinetic energy when the molten aluminum fills the convex rectangular cores near the feeding structure and then fills the convex rectangular cores in other areas.

[0012] The cylindrical core has a transition groove at its top for molten aluminum to pass through. The side opening of the transition groove corresponds to the area between two adjacent convex rectangular cores. Therefore, in the initial stage when the molten aluminum enters the forming cavity through the flow channel, some of the molten aluminum can flow directly from between the two convex rectangular cores into the transition groove and continue to flow away from the flow channel along the axial direction of the transition groove. Since the convex annular core and the concave annular cavity are successively surrounding the outside of the cylindrical core, the two streams of molten aluminum flowing along the concave annular cavity will intersect with the molten aluminum flowing along the transition groove. The flow path of this part of the molten aluminum flowing along the transition groove is longer than that of the two streams. The flow path of the molten aluminum flowing forward along the concave annular cavity is short, and it does not need to cross the convex rectangular core. The flow resistance of this part of the molten aluminum flowing along the transition groove is small, and the kinetic energy loss is small. Therefore, this part of the molten aluminum has higher kinetic energy. When the two streams of molten aluminum flowing along the concave annular cavity come into contact with the molten aluminum flowing along the transition groove, they will flow away from the flow channel along with the molten aluminum flowing along the transition groove. This reduces the situation where the two streams of molten aluminum flowing along the concave annular cavity stagnate and backflow at the confluence, thereby reducing the situation where impurities remain in the stagnant area and inside the product, and improving the product yield.

[0013] After the aluminum liquid is filled, the first cooling structure and the second cooling structure can cool the aluminum liquid in the forming cavity from both sides of the forming cavity, thereby accelerating its solidification speed; the point cooling structure can cool the aluminum liquid in the concave annular mold cavity area, further accelerating the solidification speed of the aluminum liquid in this area, thereby improving the overall production efficiency.

[0014] 2) According to the front cover smooth surface forming mold described in 1), wherein: The first cooling structure includes several first cooling pipes for cooling water to flow through, the first cooling pipes are evenly distributed in the moving mold and are located outside the moving forming part; the second cooling structure includes several second cooling pipes for cooling water to flow through, the second cooling pipes are evenly distributed in the fixed mold and are located outside the fixed forming part.

[0015] In this invention, after the high-temperature and high-pressure molten aluminum enters the molding cavity, the heat of the molten aluminum is transferred to the moving mold and the fixed mold. The flow of cooling water in the first cooling pipe can absorb and remove the heat in the moving mold, and the flow of cooling water in the second cooling pipe can absorb and remove the heat in the fixed mold. This can accelerate the solidification of the molten aluminum in the molding cavity and thus improve the overall production efficiency.

[0016] 3) A front cover smooth surface forming mold according to 1), wherein: The point cooling structure includes several point cooling components for supplying cooling water. The moving mold is provided with several point cooling grooves into which the ends of the point cooling components extend and which correspond one-to-one with the point cooling components. The position of the point cooling groove corresponds to the position of the concave annular cavity, and there is a certain gap between the bottom of the point cooling groove and the concave annular cavity.

[0017] In this invention, after the high-temperature, high-pressure molten aluminum enters the forming cavity, the heat of the molten aluminum is transferred to the moving mold and the fixed mold. The end of the spot cooling component can extend into the spot cooling tank, and then the cooling water flowing inside the spot cooling component absorbs and carries away the heat in the concave annular cavity region of the moving mold. There is a certain gap between the bottom of the spot cooling tank and the inner wall of the concave annular cavity to avoid direct contact between the spot cooling component and the inner wall of the concave annular cavity, reducing the possibility of cracking of the concave annular cavity due to sudden cooling.

[0018] 4) A front cover smooth surface forming mold according to 3), wherein: The ignition cooling assembly includes an ignition cooling cylinder with a closed top, and an ignition cooling tube with a closed top and an open bottom inside the ignition cooling cylinder. There is a certain gap between the side wall of the ignition cooling tube and the side wall of the ignition cooling cylinder. The bottom end of the ignition cooling tube extends outward from the ignition cooling cylinder and into the corresponding ignition cooling groove. There is a certain gap between the bottom of the ignition cooling tube and the inner wall of the bottom of the ignition cooling groove, and there is a certain gap between the outer wall of the ignition cooling tube and the inner wall of the ignition cooling groove. The bottom end of the ignition cooling cylinder is fixedly connected to the moving mold. The side wall of the ignition cooling cylinder has an inlet and an outlet from top to bottom. The inlet is connected to the ignition cooling tube.

[0019] In this invention, cooling water enters the cooling pipe through the inlet on the cooling cylinder and moves downwards along the cooling pipe to its bottom. It then flows into the cooling tank through the gap between the bottom of the cooling pipe and the bottom wall of the cooling tank. Subsequently, the cooling water flows upwards back into the cooling tank along the gap between the outer wall of the cooling pipe and the inner wall of the cooling tank, and finally exits from the outlet of the cooling cylinder. During this cooling water flow process, heat in the concave annular cavity region of the moving mold is absorbed and carried away, effectively cooling the molten aluminum in this region and accelerating its solidification, thereby improving overall production efficiency.

[0020] 5) A front cover smooth surface forming mold according to 1), wherein: The fixed mold has several overflow channels that connect to the ends of the fixed forming part away from the flow channel. The fixed mold also has several fixed slag traps that correspond one-to-one with and connect to the overflow channels. The moving mold has several moving slag traps that correspond one-to-one with the fixed slag traps. When the fixed and moving molds are closed, the fixed and moving slag traps together form a slag trap chamber for collecting impurities in the molten aluminum. The slag trap chamber is connected to a common venting structure. In this invention, a slag overflow channel is provided at the end of the forming section away from the flow channel and is connected to it. During the flow of molten aluminum, the molten aluminum flowing at the front end enters the slag chamber through the slag overflow channel, thereby guiding some impurities to the slag chamber and reducing the impurities remaining in the product. At the same time, during the flow of molten aluminum, the molten aluminum continuously pushes the air in the forming cavity, slag chamber, and exhaust structure, eventually causing the gas to be discharged through the exhaust structure.

[0021] 6) A front cover smooth surface forming mold according to 5), wherein: The venting structure includes an upper venting block fixedly disposed on one side of the moving mold and a lower venting block fixedly disposed on one side of the fixed mold. The lower venting block has a lower venting plate on the side facing the upper venting block. The lower venting plate has several alternating first concave teeth and first convex teeth. The upper venting block has a groove on the side facing the lower venting block. One end of the groove is connected to the molding cavity. The upper venting plate is disposed in the groove. The upper venting plate has several alternating second concave teeth and second convex teeth. The positions of the first concave teeth and second convex teeth are one-to-one, and the positions of the first convex teeth and second concave teeth are one-to-one. When the moving mold and the fixed mold are closed, the lower venting plate can extend into the groove. A wave-shaped venting channel is formed between the first concave teeth, the first convex teeth and the second concave teeth, and the second convex teeth.

[0022] In this invention, during the flow of molten aluminum, the molten aluminum continuously pushes the air in the forming cavity, slag bag chamber, and exhaust structure, eventually causing the gas to be discharged through a wave-shaped exhaust channel. At the same time, the wave-shaped exhaust channel can reduce the amount of molten aluminum discharged. Specifically, when the molten aluminum flows in the wave-shaped exhaust channel, it needs to repeatedly overcome the undulations of the wave-shaped exhaust channel, which increases the flow resistance of the molten aluminum, thereby consuming the kinetic energy of the molten aluminum and thus reducing the amount of molten aluminum discharged.

[0023] 7) A front cover smooth surface forming mold according to 6), wherein: One end of the exhaust channel is provided with an air inlet, and the other end of the exhaust channel is provided with an air outlet. The air inlet is connected to the overall forming cavity, and the cross-section of the exhaust channel gradually decreases from the air inlet to the air outlet.

[0024] In this invention, when the molten aluminum enters the exhaust channel and flows within it, the cross-sectional area of ​​the exhaust channel gradually decreases from the inlet to the outlet. As the molten aluminum flows through the exhaust channel, the resistance it experiences gradually increases, thereby accelerating the consumption of the molten aluminum's kinetic energy and reducing the amount of molten aluminum discharged.

[0025] Compared with the prior art, the present invention also has the following technical effects: In this invention, the flow channels correspond one-to-one with the convex rectangular cores. The molten aluminum can directly reach the area where the convex rectangular cores are located in the early stage of entering the molding cavity. The molten aluminum can climb and cross the convex rectangular cores with sufficient kinetic energy, thereby reducing the situation of incomplete filling in this area due to insufficient kinetic energy of the molten aluminum. At the same time, some molten aluminum can flow into the molding cavity from both sides of the convex rectangular cores with higher kinetic energy. Compared with the prior art, this invention reduces the situation of incomplete filling in other areas due to the decrease in kinetic energy when the molten aluminum fills the convex rectangular cores and then fills other areas.

[0026] When the two streams of molten aluminum flowing along the concave annular cavity come into contact with the molten aluminum flowing along the transition channel, they will flow away from the flow channel along with the molten aluminum flowing along the transition channel. This reduces the stagnation and backflow of the two streams of molten aluminum flowing along the concave annular cavity at the confluence point, thereby reducing the amount of impurities left in the stagnant area and inside the product, and improving the product yield. In addition, after the molten aluminum is filled, the first cooling structure and the second cooling structure can cool the molten aluminum in the forming cavity from both sides, accelerating its solidification rate; the point cooling structure can cool the molten aluminum in the concave annular cavity area, further accelerating the solidification rate of the molten aluminum in this area, thereby improving the overall production efficiency. Attached Figure Description

[0027] Figure 1 This is a perspective view of the front cover of the casing in the prior art.

[0028] Figure 2 This is a perspective view of the front cover of the casing in the prior art.

[0029] Figure 3 This is a schematic diagram of the structure of a front end cover forming mold according to the present invention.

[0030] Figure 4 This is a schematic diagram of the moving mold in a front end cover forming mold of the present invention.

[0031] Figure 5 This is a schematic diagram of the fixed mold in a front end cover forming mold of the present invention.

[0032] Figure 6 This is a schematic diagram of the structure of the second cooling pipe in a front end cover forming mold of the present invention.

[0033] Figure 7 This is a schematic diagram of the structure of the first cooling pipe in a front end cover forming mold of the present invention.

[0034] Figure 8 This is a schematic diagram of the cooling component in a front end cover forming mold according to the present invention.

[0035] Figure 9 This is a flowchart of a molding method for a front end cover smooth surface molding die according to the present invention. Detailed Implementation

[0036] The following detailed description illustrates the specific implementation method: The reference numerals in the accompanying drawings include: 1. Circular through hole; 2. Concave ring; 3. Convex ring; 4. Rectangular groove; 5. Fixed mold; 6. Moving mold; 7. Cylindrical core; 8. Convex ring core; 9. Concave ring cavity; 10. Convex rectangular core; 11. Flow channel; 12. Transition channel; 13. First cooling pipe; 14. Second cooling pipe; 15. Spot cooling cylinder; 16. Water inlet; 17. Water outlet; 18. Spot cooling pipe; 19. Spot cooling inlet; 20. Slag overflow channel; 21. Fixed slag enclosure groove; 22. Moving slag enclosure groove; 23. Upper vent block; 24. Lower vent block; 25. Feed column.

[0037] This embodiment discloses a front end cover smooth surface forming mold and its forming method, including a fixed mounting frame and a movable mounting frame placed opposite each other, with a sliding mounting seat between the fixed mounting frame and the movable mounting frame, and a slide rail on the sliding mounting seat; it also includes a fixed mold 5 and a movable mold 6, the fixed mold 5 being fixedly connected to the fixed mounting frame by bolts and nuts, the bottom of the movable mold 6 being fixedly connected to a slider by bolts and nuts, the slider being able to slide along the slide rail, and a cylinder being fixedly connected to the movable mounting frame by bolts and nuts, the output shaft of the cylinder being fixedly connected to the side of the movable mold 6 away from the fixed mold 5 by bolts and nuts.

[0038] See Figure 3 and Figure 4 As shown, the fixed mold 5 has a fixed forming part on its side facing the moving mold 6. When the fixed mold 5 and the moving mold 6 are closed, the fixed forming part and the moving forming part can jointly enclose and form a forming cavity for containing molten aluminum and cooling it. The moving forming part includes a cylindrical core 7 for forming the circular through hole 1 of the front end cover, a convex ring core 8 for forming the concave ring 2 of the front end cover, and a concave ring cavity 9 for forming the convex ring 3 of the front end cover, which are sequentially surrounded by the cylindrical core 7. The fixed forming part includes ten convex rectangular cores 10 for forming the ten rectangular grooves 4 of the front end cover. The top of the cylindrical core 7 has a transition groove 12 for molten aluminum to pass through. The side opening of the transition groove 12 corresponds to the area between the two convex rectangular cores 10 that are respectively located in the middle of the two flow channels 11.

[0039] See Figure 5As shown, a feed post 25 is welded onto the fixed mold 5. Six convex rectangular cores 10 are close to the feed post 25, and another four convex rectangular cores 10 are located in the opposite area of ​​the feed post 25. The top of the feed post 25 has a feed port for injecting molten aluminum, and the side wall of the feed post 25 has two discharge ports. The fixed mold 5 has two feed channels that correspond to and are connected to the discharge ports. The fixed mold 5 has six flow channels 11 that are connected to the fixed forming part. Three flow channels 11 are connected to one of the feed channels, and the other three flow channels 11 are connected to the other feed channel. Each flow channel 11 corresponds to a convex rectangular core 10 close to the feed post 25. The width of the end of each flow channel 11 close to the convex rectangular core 10 is greater than the length of the side of the corresponding convex rectangular core 10 facing the flow channel 11. Molten aluminum flowing out through the flow channel 11 can flow from the front and side areas of the corresponding convex rectangular core 10.

[0040] See Figure 6 and Figure 7 As shown, the moving mold 6 has 5 first cooling through holes, through which a first cooling pipe 13 passes. The first cooling pipe 13 is welded to the side wall at the end of the first cooling through hole, and there is a certain gap between the first cooling pipe 13 and the moving forming part. The fixed mold 5 has 6 second cooling through holes, through which a second cooling pipe 14 passes. The second cooling pipe 14 is welded to the side wall at the end of the second cooling through hole, and there is a certain gap between the second cooling pipe 14 and the fixed forming part. The two ends of the first cooling pipe 13 are respectively welded and connected to a first circulation inlet pipe and a first circulation outlet pipe, and the two ends of the second cooling pipe 14 are respectively welded and connected to a second circulation inlet pipe and a second circulation outlet pipe.

[0041] See Figure 8 As shown, the moving mold 6 has eight cooling grooves extending towards the moving forming part on the side away from the moving forming part. The positions of the cooling grooves correspond to the positions of the concave annular cavity 9, and there is a gap between the bottom of the cooling groove and the concave annular cavity 9. Eight cooling cylinders 15, corresponding one-to-one with the cooling grooves and connected to each other, are welded onto the moving mold 6. The top of the cooling cylinder 15 is closed, and the side wall of the cooling cylinder 15 has an inlet 16 and an outlet 17 from top to bottom. Cooling pipes 18 are welded inside the cooling cylinders 15, and there is a gap between the side wall of the cooling pipe 18 and the inner side wall of the cooling cylinder 15. The cooling pipe 18 has a fixed gap, with its top end closed and its bottom end open. The bottom end of the cooling pipe 18 extends into the cooling tank, and there is a gap between the bottom end of the cooling pipe 18 and the inner wall of the cooling tank. There is also a certain gap between the side wall of the cooling pipe 18 and the inner side wall of the cooling tank. The cooling pipe 18 has a cooling inlet 19. The gaps between the cooling pipe 18, the cooling cylinder 15, and the cooling tank together form a return cavity for the flow of cooling water. The cooling inlet pipe passes through the water inlet 16 and is welded and connected to the cooling inlet 19. The cooling outlet pipe is welded and connected to the water outlet 17.

[0042] All the first circulation inlet pipes, second circulation inlet pipes, and spot cooling inlet pipes are welded together to form a main inlet pipe. All the first circulation outlet pipes, second circulation outlet pipes, and spot cooling outlet pipes are welded together and connected to a main outlet pipe. The main inlet pipe is connected to the inlet of the chiller that prepares the circulating cooling water. The main outlet pipe is threaded and connected to a suction pump. The end of the suction pump away from the main inlet pipe is connected to the outlet of the chiller.

[0043] The fixed mold 5 has nine overflow channels 20, each of which is connected to the end of the fixed forming part away from the flow channel 11. The fixed mold 5 has several fixed slag pockets 21 that correspond one-to-one with and are connected to the overflow channels 20. The moving mold 6 has several moving slag pockets 22 that correspond one-to-one with the fixed slag pockets 21. When the fixed mold 5 and the moving mold 6 are closed, the fixed slag pockets 21 and the moving slag pockets 22 together form a slag pocket chamber for collecting impurities in the molten aluminum. The moving mold 6 has nine exhaust channels that correspond one-to-one with and are connected to the slag pocket chamber. The moving mold 6 has two main exhaust channels, of which four exhaust channels are connected to one of the main exhaust channels, and the other five exhaust channels are connected to the other main exhaust channel.

[0044] Two venting structures are welded to one side of the moving mold 6. The venting structure includes an upper venting block 23 welded to one side of the moving mold 6 and a lower venting block 24 welded to one side of the fixed mold 5. A lower venting plate is welded to the side of the lower venting block 24 facing the upper venting block 23. The lower venting plate has several alternating first concave teeth and first convex teeth integrally formed. A groove is opened on the side of the upper venting block 23 facing the lower venting block 24. One end of the groove is connected to the molding cavity. The upper venting plate is welded inside the groove. A number of alternating second concave teeth and second convex teeth are integrally formed on the upper venting plate. The positions of the first concave teeth and second convex teeth are one-to-one, and the positions of the first convex teeth and second concave teeth are one-to-one. When the moving mold and the fixed mold are closed, the lower venting plate can extend into the groove. At this time, a wave-shaped venting channel is formed between the first concave teeth, the first convex teeth, the second concave teeth, and the second convex teeth. One end of the venting channel is the air inlet, and the other end of the venting channel is the air outlet. The air inlet is connected to the overall molding cavity. The cross-section of the venting channel gradually decreases from the air inlet to the air outlet.

[0045] See Figure 9 As shown, the specific implementation process of this embodiment includes the following steps: Step 1: Start the cylinder. The output shaft of the cylinder extends, driving the moving mold 6 to move closer to the fixed mold 5 until the moving mold 6 and the fixed mold 5 are closed. Step 2: After the moving mold 6 and the fixed mold 5 are closed, the fixed forming part and the moving forming part together form a forming cavity for containing the molten aluminum and cooling it into shape. The cylinder is closed. Molten aluminum is injected into the feed column 25 through the feed port. The molten aluminum flows into the forming cavity through the flow channel 11 and fills the forming cavity. At the same time, the gas in the forming cavity is discharged through the exhaust channel. Step 3: After the aluminum liquid is filled, turn on the chiller and suction pump. Cooling water flows into the main inlet pipe through the chiller inlet. Then, the cooling water in the main inlet pipe flows into the first circulation inlet pipe, the second circulation inlet pipe, and the spot cooling inlet pipe. The cooling water in the first circulation inlet pipe then enters the first cooling pipe 13, completes heat exchange, and flows out through the first circulation outlet pipe. The cooling water in the second circulation pipe enters the second cooling pipe 14, completes heat exchange, and flows out through the second circulation outlet pipe. The cooling water in the spot cooling inlet pipe enters the spot cooling pipe 18, completes heat exchange, and flows out through the spot cooling outlet pipe. The cooling water flowing out through the first circulation outlet pipe, the second circulation outlet pipe, and the spot cooling outlet pipe all flow into the main outlet pipe, and finally flows into the chiller through the chiller outlet for circulating cooling. Step 4: After the aluminum liquid in the forming cavity has been cooled by cooling water, turn off the chiller and the suction pump; turn on the cylinder, the output shaft of the cylinder retracts, and drives the moving mold 6 to move away from the fixed mold 5, so that the moving mold 6 separates from the fixed mold 5 and opens. Step 5: After the mold is opened, close the cylinder and remove the product.

[0046] The above are merely embodiments of the present invention. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A front end cap smooth surface forming mold, comprising a fixed mold and a movable mold movable along a direction approaching or away from the fixed mold, wherein the fixed mold has a fixed forming part on the side facing the movable mold, and the movable mold has a movable forming part on the side facing the fixed mold, the fixed forming part and the movable forming part being able to jointly enclose and form a forming cavity for receiving molten aluminum and cooling it for forming, the movable forming part comprising a cylindrical core for forming a circular through hole of the front end cap, a convex annular core for forming a concave annular ring of the front end cap sequentially surrounding the cylindrical core, and a concave annular cavity for forming the convex annular ring of the front end cap, the fixed forming part comprising a convex rectangular core for forming a rectangular groove of the front end cap, the fixed mold having a feeding structure communicating with the fixed forming part for injecting molten aluminum into the forming cavity, characterized in that... The fixed mold has several flow channels for the flow of molten aluminum and connected to the feeding structure. The ends of the flow channels away from the feeding structure are connected to the fixed forming part. Each flow channel corresponds to a convex rectangular core near the feeding structure. The flow channels are used to guide the molten aluminum to the convex rectangular core and the areas on both sides of the convex rectangular core. The top of the cylindrical core has a transition groove for the molten aluminum to pass through. The side opening of the transition groove corresponds to the area between two adjacent convex rectangular cores. The moving mold and the fixed mold are respectively provided with a first cooling structure and a second cooling structure for cooling the molten aluminum in the forming cavity. The moving mold is provided with a point cooling structure for cooling the molten aluminum in the concave annular cavity area.

2. The front cover smooth surface forming mold according to claim 1, characterized in that: The first cooling structure includes a plurality of first cooling pipes for cooling water to flow through, the first cooling pipes being located inside the moving mold and outside the moving forming part; the second cooling structure includes a plurality of second cooling pipes for cooling water to flow through, the second cooling pipes being located inside the fixed mold and outside the fixed forming part.

3. The front cover smooth surface forming mold according to claim 1, characterized in that: The point cooling structure includes several point cooling components for supplying cooling water flow. The moving mold is provided with several point cooling grooves into which the ends of the point cooling components extend and which correspond one-to-one with the point cooling components. The position of the point cooling groove corresponds to the position of the concave annular cavity, and there is a certain gap between the bottom of the point cooling groove and the concave annular cavity.

4. The front cover smooth surface forming mold according to claim 3, characterized in that: The point cooling assembly includes a point cooling cylinder with a closed top, and a point cooling tube with a closed top and an open bottom inside the point cooling cylinder. There is a certain gap between the side wall of the point cooling tube and the side wall of the point cooling cylinder. The bottom end of the point cooling tube extends outward from the point cooling cylinder and into the corresponding point cooling groove. There is a certain gap between the bottom of the point cooling tube and the inner wall of the bottom of the point cooling groove. There is a certain gap between the outer wall of the point cooling tube and the inner wall of the point cooling groove. The bottom end of the point cooling cylinder is fixedly connected to the moving mold. The side wall of the point cooling cylinder has an inlet and an outlet from top to bottom. The inlet is connected to the point cooling tube.

5. The front cover smooth surface forming mold according to claim 1, characterized in that: The fixed mold has several overflow channels that are connected to the ends of the fixed forming part away from the flow channel. The fixed mold also has several fixed slag pockets that correspond one-to-one with and are connected to the overflow channels. The moving mold has several moving slag pockets that correspond one-to-one with the fixed slag pockets. When the fixed mold and the moving mold are closed, the fixed slag pockets and the moving slag pockets together form a slag pocket chamber for collecting impurities in the molten aluminum. The slag pocket chamber is connected to an exhaust structure.

6. The front cover smooth surface forming mold according to claim 5, characterized in that: The venting structure includes an upper venting block fixedly disposed on one side of the moving mold and a lower venting block fixedly disposed on one side of the fixed mold. The lower venting block has a lower venting plate on the side facing the upper venting block. The lower venting plate has a plurality of alternating first concave teeth and first convex teeth. The upper venting block has a groove on the side facing the lower venting block. One end of the groove is connected to the molding cavity. The upper venting plate is disposed in the groove. The upper venting plate has a plurality of alternating second concave teeth and second convex teeth. The positions of the first concave teeth and second convex teeth are one-to-one, and the positions of the first convex teeth and second concave teeth are one-to-one. When the moving mold and the fixed mold are closed, the lower venting plate can extend into the groove. A wave-shaped venting channel is formed between the first concave teeth, the first convex teeth and the second concave teeth and the second convex teeth.

7. The front cover smooth surface forming mold according to claim 6, characterized in that: One end of the exhaust channel is provided with an air inlet, and the other end of the exhaust channel is provided with an air outlet. The air inlet is connected to the overall forming cavity, and the cross-section of the exhaust channel gradually decreases from the air inlet to the air outlet.

8. A molding method for a front end cover smooth surface molding die according to any one of claims 1-7, comprising the following steps: Step 1: Drive the moving mold to move closer to the fixed mold until the moving mold and the fixed mold are closed; Step 2: After the moving mold and the fixed mold are closed, molten aluminum is injected into the forming cavity through the feeding structure; Step 3: Cool the molten aluminum in the forming cavity through the first cooling structure and the second cooling structure. At the same time, further cool the molten aluminum in the concave annular cavity area through the point cooling structure. Step 4: After cooling is complete, drive the moving mold to move away from the fixed mold until the moving mold separates from the fixed mold and opens. Step 5: After separating and opening the moving mold and fixed mold, remove the product.

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