A die-casting die based on sequential filling and venting of helical runner

Abstract

This utility model relates to a die-casting mold based on sequential filling and venting using a spiral flow channel. It includes an upper mold frame and a lower mold frame, with an upper mold core and a lower mold core installed between them. Two cylindrical cavities are arranged side-by-side between the upper and lower mold cores. A left core-pulling post and a right core-pulling post are inserted into each side of the upper end of the lower mold frame, respectively. Two lower mold cavities are arranged side-by-side at the upper end of the lower mold core. A semi-annular lower flow channel groove is arranged at the left port of each lower mold cavity. An upper mold cavity is located at the lower end of the upper mold core. The upper and lower mold cavities are joined to form a cylindrical cavity. An upper flow channel groove is arranged at the left port of the upper mold cavity. A partition is provided at the end of the upper flow channel groove. The upper and lower flow channel grooves are joined and connected to form a spiral flow channel. This utility model changes the aluminum liquid filling flow from a linear direction to a spiral direction. The spiral flow channel provides resistance to the aluminum liquid filling, and the filling direction proceeds sequentially from the inlet to the end, reducing backflow.

Description

Technical Field

[0001] This utility model relates to the field of die casting mold technology, and in particular to a die casting mold based on spiral flow channel sequential filling and venting. Background Technology

[0002] In the die-casting process, the feeding method of the mold has a crucial impact on the quality of the casting. Cylindrical parts, due to structural limitations, can only be fed through the inlet. In conventional designs, the aluminum liquid flow is generally linear. For these parts, because the filling process is unobstructed, the aluminum liquid preferentially fills to the end and then back to the ingate. This linear feeding method has several drawbacks:

[0003] 1. Air entrapment at the end of the product leads to porosity in the casting, severely affecting its mechanical and sealing properties;

[0004] 2. Peeling is prone to occur on the product surface, which reduces the product's appearance quality and surface precision;

[0005] 3. The product surface often develops spots, affecting the overall aesthetics and market competitiveness of the product. Summary of the Invention

[0006] The technical problem to be solved by this utility model is to provide a die casting mold based on sequential filling and venting of a spiral flow channel. The flow pattern of aluminum liquid filling is changed from a straight line to a spiral direction. The spiral flow channel makes the aluminum liquid filling have a certain resistance. The filling direction is from the inlet to the end sequentially, which reduces the backflow phenomenon. At the same time, in conjunction with the venting groove at the right end of the lower mold cavity, it is conducive to the smooth discharge of gas and effectively improves the defect of air holes at the end of the product.

[0007] The technical solution adopted by this utility model to solve its technical problem is as follows: A die-casting mold based on spiral flow channel sequential filling and venting is provided, including an upper mold frame and a lower mold frame. An upper mold core and a lower mold core are stacked vertically between the upper mold frame and the lower mold frame. Two cylindrical cavities are arranged side-by-side between the upper mold core and the lower mold core. A left core-pulling post and a right core-pulling post are respectively inserted into both sides of the upper end of each mold cavity of the lower mold frame. The left core-pulling post and the right core-pulling post are connected together. Two semi-cylindrical lower mold cavities are arranged side-by-side at the upper end of the lower mold core. A semi-circular lower runner groove is arranged at the left port of the cavity. The lower end of the upper mold core is provided with an upper mold cavity that corresponds one-to-one with the lower mold cavity. The upper mold cavity and the lower mold cavity are spliced ​​together to form a cylindrical cavity. A semi-circular upper runner groove is arranged at the left port of the upper mold cavity. A partition is provided at the end of the upper runner groove. The upper runner groove and the lower runner groove are spliced ​​together to form a spiral runner. The spiral runner is C-shaped. A flow divider cone is installed on the upper end of the upper mold frame on the left side of the upper mold core. A gating channel is provided on the upper end of the upper mold core between the flow divider cone and the two lower runner grooves.

[0008] As a supplement to the technical solution described in this utility model, the upper end of the lower mold frame is provided with two horizontally sliding left slide blocks arranged side by side on the left side of the lower mold core. The right ends of the two left slide blocks are respectively connected to two left core-pulling columns. The left side of the lower mold frame is provided with two small hydraulic cylinders arranged side by side, and the two small hydraulic cylinders are respectively connected to the two left slide blocks.

[0009] As a supplement to the technical solution described in this utility model, the upper end of the lower mold frame is provided with two horizontally sliding right slide blocks arranged side by side on the right side of the lower mold core. The left ends of the two right slide blocks are respectively connected to two right core-pulling columns. The right ends of the two right slide blocks are connected together by a bracket. A large hydraulic cylinder is installed on the right side of the lower mold frame, and the piston rod of the large hydraulic cylinder is connected to the bracket.

[0010] As a supplement to the technical solution described in this utility model, an exhaust groove is provided at the upper end of the lower mold core at the right port of each lower mold cavity.

[0011] As a supplement to the technical solution described in this utility model, the casting channel includes a main channel and two branch channels. The main channel is provided at the outlet of the branch cone, and the end of the main channel branches to form two branch channels. One end of each branch channel is connected to the corresponding spiral channel.

[0012] As a supplement to the technical solution described in this utility model, a material injection port is provided at the connection between the spiral flow channel and the cylindrical cavity, and the cross-sectional area of ​​the material injection port decreases from the spiral flow channel towards the cylindrical cavity.

[0013] Beneficial effects: This utility model relates to a die-casting mold based on sequential filling and venting of a spiral flow channel, which has the following advantages:

[0014] 1. The flow pattern of molten aluminum is changed from a straight line to a spiral direction. The spiral flow channel creates resistance to the filling of molten aluminum. The filling direction proceeds sequentially from the inlet to the end, reducing backflow. At the same time, the venting groove at the right end of the lower mold cavity facilitates the smooth discharge of gas and effectively improves the defect of air holes at the end of the product.

[0015] 2. Improve product surface quality: The spiral feeding method makes the aluminum liquid filling process more orderly, avoiding the aluminum liquid disorder caused by backflow and other reasons, and reducing the peeling phenomenon on the product surface; moreover, the spiral feeding method makes the aluminum liquid fill closer to the full wall thickness during the filling process, ensuring that the forming quality of each part of the casting is uniform and consistent, and effectively solving the problem of surface spots on the product.

[0016] 3. Improve production efficiency and reliability: The left and right core-pulling columns are driven by small and large hydraulic cylinders respectively through the left and right slides, realizing precise control of the core-pulling process, ensuring the stability and reliability of the core-pulling process, and helping to improve production efficiency.

[0017] 4. Ensure uniform filling: The casting channel adopts a main channel plus branch channel structure, which can evenly distribute the aluminum liquid to two spiral channels, ensuring consistent filling effect in the two cylindrical cavities and improving product consistency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the lower mold core and the lower mold frame described in this utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the flow divider cone and the lower mold core described in this utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the upper mold frame and the upper mold core described in this utility model;

[0022] Figure 5 This is a structural schematic diagram of the casting system and cylindrical motor housing of this utility model.

[0023] Diagram: 1. Upper mold frame, 2. Upper mold core, 3. Cylindrical cavity, 4. Lower mold core, 5. Lower mold frame, 6. Left core-pulling column, 7. Left slide block, 8. Small hydraulic cylinder, 9. Right core-pulling column, 10. Right slide block, 11. Large hydraulic cylinder, 12. Support, 13. Diverter cone, 14. Gating runner, 15. Lower mold cavity, 16. Lower runner groove, 17. Upper mold cavity, 18. Upper runner groove, 19. Partition, 20. Venting groove, 21. Spiral runner, 22. Injection port, 23. Cylindrical motor housing, 24. Main runner, 25. Diverter runner. Detailed Implementation

[0024] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims.

[0025] The embodiments of this utility model relate to a die-casting mold based on sequential filling and venting of a spiral flow channel, such as... Figure 1-5As shown, the die includes an upper mold frame 1 and a lower mold frame 5. An upper mold core 2 and a lower mold core 4 are stacked between the upper mold frame 1 and the lower mold frame 5. Two cylindrical cavities 3 are arranged side-by-side between the upper mold core 2 and the lower mold core 4. A left core-pulling post 6 and a right core-pulling post 9 are inserted into the upper end of each mold cavity 5 on both sides. The left core-pulling post 6 and the right core-pulling post 9 are connected together. This connection allows for smooth extraction after die casting, ensuring successful demolding of the casting and improving production efficiency. Two semi-cylindrical lower mold cavities 15 are arranged side-by-side at the upper end of the lower mold core 4. A semi-annular lower runner groove 16 is arranged at the left end of each lower mold cavity 15. The lower end of the upper mold core 2 has an upper mold cavity 17 corresponding to each lower mold cavity 15. The upper mold cavity 17 is connected to the lower mold cavity 15. Cavity 15 is spliced ​​to form cylindrical cavity 3. A semi-annular upper runner groove 18 is arranged at the left port of the upper mold cavity 17. A partition part 19 is provided at the end of the upper runner groove 18. The upper runner groove 18 and the lower runner groove 16 are spliced ​​and connected to form a spiral runner 21. The spiral runner 21 is C-shaped. The design of the spiral runner 21 changes the filling flow state of the aluminum liquid from a straight direction to a spiral direction, so that the aluminum liquid filling has a certain resistance. The filling direction proceeds from the inlet to the end sequentially, reducing backflow. A flow divider cone 13 is installed on the upper end of the upper mold frame 1 on the left side of the upper mold core 2. A pouring runner 14 is provided on the upper end of the upper mold core 2 between the flow divider cone 13 and the two lower runner grooves 16. The flow divider cone 13 can divert and guide the aluminum liquid, ensuring that the aluminum liquid can smoothly enter the pouring runner 14.

[0026] The upper end of the lower mold core 4 is provided with an exhaust groove 20 at the right port of each lower mold cavity 15; the exhaust groove 20 is conducive to the smooth discharge of gas inside the cavity during the aluminum liquid filling process, and avoids gas residue causing defects such as porosity in the casting.

[0027] This invention changes the flow pattern of molten aluminum filling from a straight line to a spiral direction. The spiral flow channel 21 provides resistance to the aluminum filling process, and the filling direction proceeds sequentially from the inlet to the end, reducing backflow. Simultaneously, the venting groove 20 at the right end of the lower mold cavity 15 facilitates smooth gas discharge, effectively improving the defect of porosity at the product end. It also enhances product surface quality: the spiral feeding makes the aluminum filling process more orderly, avoiding molten aluminum disturbance caused by backflow and reducing surface peeling. Furthermore, the spiral feeding method allows the aluminum to fill closer to the full wall thickness during the filling process, ensuring uniform forming quality in all parts of the casting and effectively solving the problem of surface spots.

[0028] The upper end of the lower mold frame 3 is located on the left side of the lower mold core 4 and has two horizontally sliding left slide blocks 7 arranged side by side. The right ends of the two left slide blocks 7 are respectively connected to the two left core pulling columns 6. The left side of the lower mold frame 5 has two small hydraulic cylinders 8 installed side by side. The two small hydraulic cylinders 8 are respectively connected to the two left slide blocks 7. The small hydraulic cylinders 8 provide power for the sliding of the left slide blocks 7, thereby realizing the precise movement of the left core pulling columns 6.

[0029] The upper end of the lower mold frame 3 is located on the right side of the lower mold core 4 and has two horizontally sliding right slide blocks 10 arranged side by side. The left ends of the two right slide blocks 10 are respectively connected to the two right core pulling columns 9. The right ends of the two right slide blocks 10 are connected together by a bracket 12. A large hydraulic cylinder 11 is installed on the right side of the lower mold frame 5. The piston rod of the large hydraulic cylinder 11 is connected to the bracket 12. The large hydraulic cylinder 11 drives the two right slide blocks 10 to slide simultaneously through the bracket 12, thereby realizing the movement of the right core pulling column 9 and ensuring the stability and reliability of the core pulling process.

[0030] The casting channel 14 includes a main channel 24 and two branch channels 25. The main channel 24 is located at the outlet of the branching cone 13, and the end of the main channel 24 branches to form two branch channels 25. One end of each branch channel 25 is connected to a corresponding spiral channel 21. This structural design of the casting channel 14 can evenly distribute the molten aluminum into the two spiral channels 21, ensuring a consistent filling effect in the two cylindrical cavities 3.

[0031] A filling port 22 is provided at the connection between the spiral flow channel 21 and the cylindrical cavity 3. The cross-sectional area of ​​the filling port 22 decreases from the spiral flow channel 21 toward the cylindrical cavity 3. This design of the filling port 22 can play a certain role in throttling, controlling the speed and flow rate of the aluminum liquid entering the cylindrical cavity 3, so that the aluminum liquid filling is more stable.

[0032] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms 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, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0033] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0034] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0035] The above provides a detailed description of a die-casting mold based on sequential filling and venting of a spiral flow channel provided in this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A die-casting mold based on sequential filling and venting of a spiral flow channel, comprising an upper mold frame (1) and a lower mold frame (5), wherein an upper mold core (2) and a lower mold core (4) stacked vertically are installed between the upper mold frame (1) and the lower mold frame (5), and two cylindrical cavities (3) are arranged side by side between the upper mold core (2) and the lower mold core (4), characterized in that: The upper end of the lower mold frame (5) is located on both sides of each cylindrical cavity (3), with a left core-pulling post (6) and a right core-pulling post (9) inserted respectively. The left core-pulling post (6) and the right core-pulling post (9) are connected together. The upper end of the lower mold core (4) has two semi-cylindrical lower mold cavities (15) arranged side by side. A semi-annular lower runner groove (16) is arranged at the left port of the lower mold cavity (15). The lower end of the upper mold core (2) is provided with an upper mold cavity (17) that corresponds one-to-one with the lower mold cavity (15). The upper mold cavity (17) and the lower mold cavity (15) are spliced ​​together to form a circle. The cylindrical cavity (3) has a semi-circular upper runner groove (18) arranged at the left port of the upper mold cavity (17). The upper runner groove (18) is provided with a partition (19) at the end. The upper runner groove (18) and the lower runner groove (16) are spliced ​​and connected to form a spiral runner (21). The spiral runner (21) is C-shaped. The upper mold frame (1) is located on the left side of the upper mold core (2) and a flow divider cone (13) is installed. The upper mold core (2) is located between the flow divider cone (13) and the two lower runner grooves (16) and a pouring runner (14) is provided.

2. A die casting mould based on sequential filling and venting of helical flow channels according to claim 1, characterized in that: The upper end of the lower mold frame (5) is located on the left side of the lower mold core (4) and has two horizontally sliding left slide blocks (7) arranged side by side. The right ends of the two left slide blocks (7) are respectively connected to the two left core pulling columns (6). The lower mold frame (5) has two small oil cylinders (8) arranged side by side on the left side. The two small oil cylinders (8) are respectively connected to the two left slide blocks (7).

3. A die casting mould based on sequential filling and venting of helical flow channels according to claim 1, characterized in that: The upper end of the lower mold frame (5) is located on the right side of the lower mold core (4) and has two horizontally sliding right slide blocks (10) arranged side by side. The left ends of the two right slide blocks (10) are respectively connected to the two right core pull columns (9). The right ends of the two right slide blocks (10) are connected together by a bracket (12). A large hydraulic cylinder (11) is installed on the right side of the lower mold frame (5). The piston rod of the large hydraulic cylinder (11) is connected to the bracket (12).

4. A die casting mold based on sequential filling and venting of helical flow channels according to claim 1, characterized in that: The upper end of the lower mold core (4) is provided with an exhaust groove (20) at the right port of each lower mold cavity (15).

5. A die casting mold based on sequential filling and venting of helical flow channels according to claim 1, characterized in that: The casting channel (14) includes a main channel (24) and two branch channels (25). The main channel (24) is provided at the outlet of the branch cone (13). The end of the main channel (24) branches to form two branch channels (25). One end of each branch channel (25) is connected to the corresponding spiral channel (21).

6. A die casting mold based on sequential filling and venting of helical flow channels according to claim 1, characterized in that: A material inlet (22) is provided at the connection between the spiral flow channel (21) and the cylindrical cavity (3). The cross-sectional area of ​​the material inlet (22) decreases from the spiral flow channel (21) toward the cylindrical cavity (3).

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