Crankcase die-casting die
By designing slope and bending branch pipes in crankcase die-casting molds and optimizing the mold structure, the problem of dissatisfaction with metal liquid laying in the mold kernel is solved, and higher quality products and fluidity are achieved.
Patent Information
- Application Number
- CN202411792673.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-07
- Publication Date
- 2025-03-07
AI Technical Summary
When the existing crankcase die-casting molds are injected with metal liquid, it is easy to cause dissatisfaction in the lamination of the metal liquid in the mold kernel, resulting in material shortage or fracture, affecting the quality of the finished product.
A crankcase die-casting mold is designed, with a slope at the bottom of the mold core, the inlet pipe and the mold core are connected through the branch pipe, the branch pipe output end is bent to improve the flow rate, the positioning pins and drainage grooves are used to fix and optimize the mold core position, the R-angle design is designed to improve fluidity, and the air pipe and vent system are used to accelerate the flow of metal liquid and facilitate mold release.
Through the design of slopes and branch pipes, the metal liquid can flow smoothly into the mold core, avoid material shortage and fracture, and improve product quality and fluidity.
Smart Images
Figure CN119566260A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of die casting, and in particular to a crankcase die casting die. Background Art
[0002] Die casting mold is a tool for casting metal parts, a tool that completes the die casting process on a special die casting die forging machine. The basic process of die casting is: the molten metal is first cast and filled into the mold cavity at a low speed or high speed. The mold has a movable cavity surface, which is pressurized and forged with the cooling process of the molten metal, which not only eliminates the shrinkage and porosity defects of the blank, but also makes the internal structure of the blank reach the broken grains in the forged state. The comprehensive mechanical properties of the blank are significantly improved.
[0003] For crankcase die casting mold, its structure may be more complicated to adapt to the shape and size requirements of the crankcase. It may include mold frame, mold core, auxiliary parts, auxiliary systems and other parts. Among them, the mold core is the core part of the mold, which is responsible for forming the shape of the crankcase. The auxiliary system includes the pouring system, ejection system, cooling system and exhaust system to ensure the smooth progress of the die casting process.
[0004] The existing crankcase die-casting mold is prone to the problem that the molten metal is not fully laid in the mold core when injected, resulting in material shortage or breakage, which affects the quality of the final product, so it needs to be improved. Summary of the invention
[0005] In order to improve the situation where the molten metal is not fully spread in the mold core when injecting the molten metal, resulting in material shortage or breakage, the present application provides a crankcase die-casting mold.
[0006] The crankcase die-casting mold provided in this application adopts the following technical solution: A crankcase die-casting mold comprises a mold frame and a mold core, wherein the mold frame is provided with a glue inlet pipe, the glue inlet pipe is connected with the mold core through a plurality of branch pipes, and a slope is provided at the bottom of the mold core, wherein an end of the slope close to the glue inlet pipe is higher than an end of the slope away from the glue inlet.
[0007] By adopting the above technical solution, when in use, the molten metal liquid is passed into the rubber inlet hose, the metal liquid enters the branch pipe, and flows into the mold core along the branch pipe. Due to the setting of the slope, the metal liquid flowing out of the branch pipe is at the highest point of the entire mold core. Then the metal liquid is located in the mold core, and the slope plays a guiding role, so that the metal liquid flows along the slope to the bottom of the slope, so that the entire mold core is filled with metal liquid. After the metal liquid is cooled and solidified, the product can be obtained.
[0008] During this process, the highest point of the mold core is filled with molten metal first, and the rest of the mold core can be filled by the dispersed flow of molten metal from the highest point of the mold core. During the whole process, the molten metal flows naturally without climbing and without resistance, which makes it easier for the molten metal to fill the mold core, so that the final product will not be incomplete, that is, lack of material, and the final product will not be missing material and break at the missing part, thereby improving the quality of the product.
[0009] Optionally, one end of the branch tube close to the mold core is bent toward the mold core.
[0010] By adopting the above technical solution, the output end of the branch pipe is bent, so that the molten metal directly reaches the mold core along the branch pipe without moving around the corner, thereby increasing the flow speed of the molten metal.
[0011] Optionally, a positioning pin is provided in the middle of the mold core, and the positioning pin is arranged on the mold frame.
[0012] By adopting the above technical solution, when the mold core is placed on the mold frame, the positioning pin is inserted into the middle of the mold core and fixed on the mold frame. At this time, the surrounding side of the positioning pin abuts against the mold core, which plays a limiting role, so that the mold core will not be displaced, thereby realizing the positioning of the mold core on the mold frame.
[0013] Optionally, a drainage groove is provided on the positioning pin, and both ends of the drainage groove are connected to the mold core.
[0014] By adopting the above technical solution, the drainage groove acts as a bridge, so that the mold core space on both sides of the locating pin is connected, that is, when the molten metal flows from the high point to the low point of the mold core, the locating pin will not block the molten metal, so that it is not easy to have material shortage in the entire mold core, thereby improving the fluidity of the molten metal.
[0015] Optionally, a plurality of R corners are provided at the edge of the mold core.
[0016] By adopting the above technical solution, the R angle makes the edge of the mold core more rounded. When the molten metal moves in the mold core, the R angle plays a guiding role, making it easier for the molten metal to flow through the edge of the entire mold core, thereby improving fluidity. At the same time, the smooth edge can also overcome the risk of chipping and improve the quality of the final product.
[0017] Optionally, a mold temperature controller is provided on the mold frame, and the mold temperature controller is connected to a temperature control oil pipe, and the temperature control oil pipe covers the top of the mold core.
[0018] By adopting the above technical solution, the mold temperature controller adjusts the temperature in the temperature control oil pipe so that the temperature of the temperature control oil pipe is always at a fixed value. The temperature control oil pipe covers the mold core, so that heat can be transferred to the mold core, so that the temperature of the mold core reaches a constant temperature effect, avoiding the mold core from being hot and cold, and the molten metal in the mold core will not suffer from excessive temperature fluctuations, so that cracks are less likely to appear on the final product.
[0019] Optionally, a plurality of air tubes are provided in the mold frame, and a plurality of air holes are opened on the side wall of the mold. The plurality of air tubes correspond to the air holes one by one, and the air tubes are connected to the corresponding air holes. A piston is provided in the air tube, and the circumferential side of the piston is pressed against the inner wall of the air tube. The piston can move along the length direction of the air tube.
[0020] By adopting the above technical solution, when the molten metal enters the rubber inlet pipe, the piston is driven to move away from the mold core, so that the air pipe draws gas from the mold core, causing suction in the mold core, thereby accelerating the entry of the molten metal into the mold core and increasing the flow rate of the molten metal.
[0021] When the molten metal enters the mold core through the branch pipe, the original gas in the mold core space occupied by the molten metal is squeezed into the air pipe for storage. When demolding, the piston can be driven to move toward the mold core, and the gas stored in the air pipe can be pumped back into the mold core, thereby applying thrust to the product in the mold core, making it easier to separate the product from the inner wall of the mold core, thereby facilitating demolding.
[0022] Optionally, an electric push rod is provided on the mold frame, and the output end of the ground hole push rod is connected to a connecting rod, and a plurality of driving rods are fixed on the connecting rod. The plurality of driving rods correspond to air pipes one by one, and the driving rods are inserted into corresponding air pipes and fixed to the piston. The electric push rod is used to drive the connecting rods to move closer to or away from the air pipe.
[0023] By adopting the above technical solution, the electric push rod is started to drive the connecting rod to move, which can drive several driving rods to move the same distance synchronously, so that several pistons move at the same time, and several air pipes can cooperate with the suction work of feeding and the exhalation work of demoulding at the same time.
[0024] Optionally, a vibrating rod is provided in the glue inlet pipe, and the vibrating rod is arranged along the radial direction of the glue inlet pipe. A driving component is provided on the glue inlet pipe, and the driving component is connected to the vibrating rod for driving the vibrating rod to move along the radial direction of the glue inlet pipe.
[0025] By adopting the above technical solution, when the molten metal enters the rubber inlet pipe, the vibrating rod is buried in the molten metal. At this time, the driving component is started to drive the vibrating rod to move back and forth along the radial direction of the rubber inlet pipe, constantly changing the position of the molten metal in the rubber inlet pipe, increasing the fluidity of the molten metal, and facilitating the molten metal to enter the mold core. The reciprocating movement of the vibrating rod causes the vibrating rod to vibrate in the molten metal, thereby removing the gas in the molten metal, making the molten metal entering the mold core more solid, and preventing partial loosening of the molten metal and cracks on the product formed after cooling and drying, thereby improving the quality of the product.
[0026] Optionally, the driving assembly includes a motor, a driving sleeve and a driving block, the motor is arranged on the outer wall of the rubber inlet pipe, a cavity is opened in the rubber inlet pipe, the driving sleeve is arranged in the cavity, the output end of the motor is coaxially fixed with the driving sleeve, and is used to drive the driving sleeve to rotate, one end of the vibrating rod is passed through the rubber inlet pipe and inserted into the driving sleeve, the vibrating rod is coaxial with the driving sleeve, the driving block is fixed on the vibrating rod, a sliding groove is opened on the inner wall of the driving sleeve, the driving block is inserted in the sliding groove, and can move in the sliding groove to drive the vibrating rod to move.
[0027] By adopting the above technical solution, the motor is started to drive the driving sleeve to rotate. Since the vibrating rod cannot rotate around the central axis of the driving sleeve, that is, when the driving sleeve rotates, the vibrating rod cannot rotate with it, so that the driving block moves relatively in the slide groove, and the inner wall of the slide groove abuts against the driving block, applying an oblique thrust to the driving block, so that the driving block finally moves back and forth along the axial direction of the driving sleeve, thereby causing the vibrating rod to move in the rubber inlet pipe, thereby realizing the vibration of the molten metal in the rubber inlet pipe.
[0028] In summary, the present application includes at least one of the following beneficial effects: 1. Move the piston to suck the gas in the mold core into the air pipe, so that negative pressure is generated in the mold core, so that the mold core generates suction on the branch pipe, which facilitates the metal liquid in the branch pipe to flow into the mold core, thereby accelerating the metal liquid to enter the mold core and increasing the flow rate of the metal liquid; 2. The driving sleeve rotates on its own. Since the vibrating rod cannot rotate with the central axis of the driving sleeve, that is, when the driving sleeve rotates, the vibrating rod cannot rotate with it, so that the driving block moves relatively in the slide groove, and the inner wall of the slide groove abuts against the driving block, exerting an oblique thrust on the driving block, so that the driving block finally moves back and forth along the axial direction of the driving sleeve, thereby making the vibrating rod move in the rubber inlet pipe, realizing the vibration of the molten metal in the rubber inlet pipe, promoting the flow of the molten metal, and reducing the poor flow caused by the high viscosity of the molten metal during the die-casting process. BRIEF DESCRIPTION OF THE DRAWINGS
[0029] Figure 1 This is a schematic structural diagram of a crankcase die-casting mold according to an embodiment of the present application; Figure 2 It is a schematic diagram of the structure inside the mold frame; Figure 3 It is a structural diagram of the mold core and the branch pipe; Figure 4 It is a structural diagram of the connection between the trachea and the mold core; Figure 5 This is a structural cross-sectional view of the rubber inlet hose.
[0030] In the figure: 10, mold frame; 11, mold core; 20, glue inlet hose; 21, branch pipe; 30, positioning pin; 31, drainage groove; 40, air pipe; 41, piston; 50, electric push rod; 51, connecting rod; 511, driving rod; 60, vibrating rod; 61, driving block; 70, driving assembly; 71, motor; 72, driving sleeve; 721, slide; 80, mold temperature controller; 81, temperature control oil pipe. DETAILED DESCRIPTION
[0031] The following is combined with Figure 1-5 This application is described in further detail.
[0032] The present application embodiment discloses a crankcase die casting mold. Figure 1 and Figure 2 The crankcase die-casting mold includes a mold frame 10 and a mold core 11. The mold frame 10 includes two templates arranged up and down. The two templates are close together and connected by bolts. The mold frame 10 serves as the basic structure of the entire mold and supports and fixes the various components. The mold frame 10 can be made of high-strength steel or aluminum alloy to ensure its sufficient rigidity and durability. The mold core 11 is the core part of the mold and is responsible for forming the shape of the crankcase. The specific mold core 11 is located between the two templates. Under the support and coverage of the upper and lower templates, the mold core 11 forms a relatively closed space. A rubber inlet pipe 20 is fixed on the mold frame 10, and a plurality of branch pipes 21 are arranged inside the mold frame 10. These branch pipes 21 connect the rubber inlet pipe 20 to the mold core 11. The plurality of branch pipes 21 are distributed throughout the mold core 11 to ensure that the molten metal can be evenly distributed to every corner of the mold core 11.
[0033] Reference Figure 1 and Figure 2 The end of the branch pipe 21 near the mold core 11 is bent downward, so as to face the inside of the mold core 11. When in use, the molten metal is passed into the rubber inlet hose 20, and the metal liquid enters the branch pipe 21 and flows into the mold core 11 along the branch pipe 21. When the metal liquid reaches the output end of the branch pipe 21, the metal liquid can automatically flow downward because the branch pipe 21 is downward, so that the metal liquid can enter the mold core 11 easily without moving around the corner, thereby increasing the flow speed of the metal liquid.
[0034] Reference Figure 1 and Figure 2A slope is installed at the bottom of the mold core 11, and the end of the slope close to the glue inlet pipe 20 is higher than the end of the slope away from the glue inlet. The design of the slope allows the molten metal to have a certain inclination angle when entering the mold core 11, which helps the molten metal flow more smoothly to the far end of the mold core 11 under the action of gravity, so that the molten metal fills the mold core 11 more evenly, reducing the shortage of materials caused by the poor flow of molten metal during the die casting process.
[0035] Reference Figure 1 and Figure 2 A positioning pin 30 is provided in the middle of the mold core 11, and the positioning pin 30 is installed in the mold frame 10. The main function of the positioning pin 30 is to ensure that the mold core 11 maintains an accurate position during the die casting process to prevent product quality problems caused by the position deviation of the mold core 11. The positioning pin 30 can be made of high-strength steel or hard alloy to ensure its sufficient strength and wear resistance.
[0036] Reference Figure 1 and Figure 2 In order to reduce the influence of the positioning pin 30 on the flow of the molten metal, a drainage groove 31 is opened on the positioning pin 30. The drainage groove 31 connects the highest point and the lowest point in the mold core 11. By adding the drainage groove 31, the flow path of the molten metal is further optimized, the resistance of the molten metal during the circulation process is reduced, and the flow speed and uniformity are improved.
[0037] Reference Figure 1 and Figure 2 In order to improve the fluidity of the molten metal in the mold core 11, a plurality of R corners are provided at the edge of the mold core 11. The shape of the R corner can be designed to be arc-shaped or elliptical. The arc-shaped R corner can better guide the flow of the molten metal, reduce the eddy current phenomenon, and increase the flow speed; the elliptical R corner can simplify the manufacturing process and reduce the production cost. The surface of the R corner can be processed by polishing and other processes to improve its smoothness and anti-adhesion, and reduce the resistance of the molten metal during the circulation process.
[0038] Reference Figure 3 and Figure 4 In order to further speed up the flow of the molten metal in the mold core 11 and make the molten metal quickly fill the mold core 11 to improve production efficiency, a plurality of air pipes 40 are provided in the mold frame 10, and a plurality of vents are opened on the side wall of the mold. The plurality of air pipes 40 correspond to the vents one by one, and the air pipes 40 are connected to the corresponding vents. The vents are covered with a waterproof breathable film, which blocks the molten metal, so that the gas can flow through the vents, but the molten metal cannot flow through the vents.
[0039] Reference Figure 3 and Figure 4A piston 41 is provided in the air pipe 40, and the circumference of the piston 41 is against the inner wall of the air pipe 40, and the piston 41 can move along the length direction of the air pipe 40. In addition, an electric push rod 50 is installed on the mold frame 10, and the output end of the electric push rod 50 is connected to a connecting rod 51, and a plurality of driving rods 511 are fixed on the connecting rod 51, and the plurality of driving rods 511 correspond to the air pipes 40 one by one, and the driving rods 511 are inserted into the corresponding air pipes 40 and fixed to the piston 41, and the electric push rod 50 is used to drive the connecting rod 51 to approach or move away from the air pipe 40.
[0040] When the molten metal enters the rubber inlet pipe 20, the electric push rod 50 is started to drive the connecting rod 51 to move, which can drive the multiple driving rods 511 to move the same distance synchronously, so that the multiple pistons 41 move at the same time, so that the air pipe 40 extracts the gas in the mold core 11, so that suction is generated in the mold core 11, thereby accelerating the molten metal to enter the mold core 11 and increasing the flow rate of the molten metal.
[0041] Reference Figure 3 and Figure 5 In order to improve the flow smoothness of the molten metal in the inlet pipe 20, a vibrating rod 60 is provided in the inlet pipe 20. The vibrating rod 60 is arranged along the radial direction of the inlet pipe 20. The vibrating rod 60 is in the shape of a square rod, so that the vibrating rod 60 will not rotate in the inlet pipe 20. A driving assembly 70 is provided on the rubber inlet pipe 20, and the driving assembly 70 includes a motor 71, a driving sleeve 72 and a driving block 61. The motor 71 is provided on the outer wall of the rubber inlet pipe 20, and a cavity is provided in the rubber inlet pipe 20. The driving sleeve 72 is located in the cavity. The output end of the motor 71 is coaxially fixed with the driving sleeve 72, and is used to drive the driving sleeve 72 to rotate. One end of the vibrating rod 60 passes through the rubber inlet pipe 20 and is inserted into the driving sleeve 72. The vibrating rod 60 is coaxial with the driving sleeve 72. The driving block 61 is fixed on the vibrating rod 60. A slide groove 721 is provided on the inner wall of the driving sleeve 72. The slide groove 721 is wavy and arranged along the circumference direction of the driving sleeve 72. The driving block 61 is inserted in the slide groove 721 and can move in the slide groove 721. The motor 71 is started to drive the driving sleeve 72 to rotate. Since the vibrating rod 60 cannot rotate with the central axis of the driving sleeve 72 as the axis, that is, when the driving sleeve 72 rotates, the vibrating rod 60 cannot rotate with it, so that the driving block 61 moves relatively in the slide groove 721, and the inner wall of the slide groove 721 abuts against the driving block 61, exerting an oblique thrust on the driving block 61, so that the driving block 61 finally reciprocates along the axial direction of the driving sleeve 72, driving the vibrating rod 60 to reciprocate along the radial direction of the rubber inlet pipe 20, constantly changing the position of the molten metal in the rubber inlet pipe 20, increasing the fluidity of the molten metal, and facilitating the molten metal to enter the mold core 11. The reciprocating movement of the vibrating rod 60 causes the vibrating rod 60 to vibrate in the molten metal, thereby removing the gas in the molten metal, making the molten metal entering the mold core 11 more solid, and there will be no partial loosening of the molten metal and cracks on the product formed after cooling and drying, thereby improving the quality of the product. The main function of the vibration rod 60 is to promote the flow of the molten metal through vibration, and reduce the poor flow caused by the high viscosity of the molten metal during the die-casting process.
[0042] Reference Figure 1 and Figure 2 In order to reduce the possibility of cracks in the final product, a mold temperature controller 80 is provided outside the mold frame 10, and the mold temperature controller 80 is connected to a temperature control oil pipe 81, and the temperature control oil pipe 81 covers the top of the mold core 11. The mold temperature controller 80 adjusts the temperature in the temperature control oil pipe 81 so that the temperature of the temperature control oil pipe 81 is always at a fixed value, and the temperature control oil pipe 81 covers the mold core 11, so that heat can be transferred to the mold core 11, so that the temperature of the mold core 11 reaches a constant temperature effect, avoiding the mold core 11 from being hot and cold, so that the metal liquid in the mold core 11 will not suffer from excessive temperature fluctuations, so that cracks are not easy to appear on the final product.
[0043] The implementation principle of a crankcase die-casting mold in an embodiment of the present application is as follows: when in use, the molten metal liquid is passed into the rubber inlet hose 20, the metal liquid enters the branch pipe 21, and flows into the mold core 11 along the branch pipe 21. Due to the setting of the slope, the metal liquid flowing out of the branch pipe 21 is at the highest point of the entire mold core 11. Then the metal liquid is located in the mold core 11, and the slope plays a guiding role, so that the metal liquid flows along the slope to the bottom of the slope, so that the entire mold core 11 is filled with metal liquid. After the metal liquid is cooled and solidified, the product can be obtained.
[0044] During this process, the highest point of the mold core 11 is filled with molten metal first, and the rest of the mold core 11 can be filled by the dispersed flow of the molten metal at the highest point of the mold core 11. During the whole process, the molten metal flows naturally without climbing and without resistance, thereby facilitating the molten metal to fill the mold core 11, and thus ensuring that the final product will not be incomplete, i.e., lack of material, and thus ensuring that the final product will not be lacking in material and break at the lacking location, thereby improving the quality of the product.
[0045] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A crankcase die casting mold, characterized in that: The mold frame (10) comprises a mold core (11), wherein a glue inlet pipe (20) is provided on the mold frame (10), and the glue inlet pipe (20) is connected to the mold core (11) through a plurality of branch pipes (21). A slope is provided at the bottom of the mold core (11), and an end of the slope close to the glue inlet pipe (20) is higher than an end of the slope away from the glue inlet.
2. The crankcase die-casting mold according to claim 1, characterized in that: One end of the branch pipe (21) close to the mold core (11) is bent toward the mold core (11).
3. The crankcase die-casting mold according to claim 1, characterized in that: A positioning pin (30) is provided in the middle of the mold core (11), and the positioning pin (30) is arranged on the mold frame (10).
4. The crankcase die-casting mold according to claim 3, characterized in that: The positioning pin (30) is provided with a drainage groove (31), and both ends of the drainage groove (31) are connected to the mold core (11).
5. The crankcase die casting mold according to claim 1, characterized in that: The edge of the mold core (11) is provided with a plurality of R corners.
6. The crankcase die-casting mold according to claim 1, characterized in that: A mold temperature controller (80) is provided on the mold frame (10), and the mold temperature controller (80) is connected to a temperature control oil pipe (81), and the temperature control oil pipe (81) covers the top of the mold core (11).
7. The crankcase die casting mold according to claim 1, characterized in that: A plurality of air pipes (40) are arranged in the mold frame (10), a plurality of ventilation holes are opened on the side wall of the mold, the plurality of air pipes (40) correspond to the ventilation holes one by one, the air pipes (40) are connected to the corresponding ventilation holes, a piston (41) is arranged in the air pipe (40), the peripheral side of the piston (41) is pressed against the inner wall of the air pipe (40), and the piston (41) can move along the length direction of the air pipe (40).
8. The crankcase die casting mold according to claim 7, characterized in that: The mold frame (10) is provided with an electric push rod (50), the output end of the ground hole push rod is connected to a connecting rod (51), a plurality of driving rods (511) are fixed on the connecting rod (51), the plurality of driving rods (511) correspond to the air pipes (40) one by one, the driving rods (511) are inserted into the corresponding air pipes (40) and are fixed to the piston (41), and the electric push rod (50) is used to drive the connecting rod (51) to approach or move away from the air pipe (40).
9. The crankcase die casting mold according to claim 1, characterized in that: A vibrating rod (60) is provided in the rubber inlet pipe (20), and the vibrating rod (60) is arranged along the radial direction of the rubber inlet pipe (20). A driving component (70) is provided on the rubber inlet pipe (20), and the driving component (70) is connected to the vibrating rod (60) and is used to drive the vibrating rod (60) to move along the radial direction of the rubber inlet pipe (20).
10. The crankcase die casting mold according to claim 9, characterized in that: The driving assembly (70) comprises a motor (71), a driving sleeve (72) and a driving block (61). The motor (71) is arranged on the outer wall of the rubber inlet pipe (20). A cavity is provided in the rubber inlet pipe (20). The driving sleeve (72) is arranged in the cavity. The output end of the motor (71) is coaxially fixed with the driving sleeve (72) for driving the driving sleeve (72) to rotate. One end of the vibration rod (60) passes through the rubber inlet pipe (20) and is inserted into the driving sleeve (72). The vibration rod (60) is coaxial with the driving sleeve (72). The driving block (61) is fixed on the vibration rod (60). A sliding groove (721) is provided on the inner wall of the driving sleeve (72). The driving block (61) is inserted in the sliding groove (721) and can move in the sliding groove (721) to drive the vibration rod (60) to move.