Die-casting device based on motorcycle engine side cover production

Abstract

The application discloses a die-casting forming device based on motorcycle engine side cover production and relates to the technical field of die-casting machines.The die-casting forming device comprises a machine body, an injection mechanism, a fixed mold plate, a hydraulic mechanism, a movable mold plate, a fixed mold base, a movable mold base, a groove, a convex mold, an adjusting block, a driving assembly and an injection nozzle.When the adjusting block is in the first position, the end face of the adjusting block is close to the mouth of the injection nozzle, and is used for receiving and dispersing the metal liquid shot by the injection nozzle.In the application, the adjusting block protrudes from the convex mold in the initial state, so that the distance between the end face of the adjusting block and the mouth of the injection nozzle is small, and then the metal liquid shot by the injection nozzle is dispersed by the end face of the adjusting block, the metal liquid is radiated and dispersed along the end face of the adjusting block, the flow rate and pressure of the metal liquid entering the cavity are reduced, the turbulence phenomenon of the metal liquid in the cavity is reduced, the air in the metal liquid can be dispersed and avoided from being wrapped into the metal liquid, and then the side cover after the die-casting can be prevented from generating pores and other phenomena.

Description

Technical Field

[0001] This invention relates to the field of die-casting machine technology, specifically to a die-casting molding device for producing motorcycle engine side covers. Background Technology

[0002] A die-casting machine is a machine used for pressure casting. It includes both hot-chamber and cold-chamber types. Both are further divided into vertical and horizontal types. Under pressure, the die-casting machine injects molten metal into a mold, where it cools and solidifies. After the mold is opened, a solid metal casting is obtained.

[0003] Motorcycle engine side covers are typically made of aluminum alloy. During manufacturing, they require die casting using a (cold chamber) die casting machine. In existing die casting machines, the injection system injects molten aluminum ingots into the cavity formed by the moving and fixed molds after mold closing. After cooling, the molten metal solidifies. When the injection system injects the molten metal into the cavity under high pressure, the high flow rate and pressure easily create significant turbulence. Under the influence of turbulence, air within the molten metal is trapped, preventing its escape. This can lead to defects such as porosity inside the die-cast side cover. Current technology often attempts to remove air by improving the structure and number of venting grooves. However, since molten metal can also enter the venting grooves, this results in a rough surface on the finished side cover. Summary of the Invention

[0004] The purpose of this invention is to provide a die-casting molding apparatus for producing motorcycle engine side covers, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a die-casting molding device for producing motorcycle engine side covers, comprising a body, an injection mechanism disposed at one end of the body, a fixed template fixed to the body, and a movable template driven by a hydraulic mechanism to move toward or away from the fixed template; The fixed template is provided with a fixed mold base, and the movable template is provided with a movable mold base. The opposite surfaces of the fixed mold base and the movable mold base are respectively provided with a groove and a punch for forming a cavity. Also includes: An adjusting block is provided, wherein the surface of the punch facing the fixed mold base has a receiving groove, and the adjusting block is movably disposed in the receiving groove and can switch between a first position and a second position; A drive assembly is disposed within the moving mold base and is connected in a transmission manner to the adjusting block, for driving the adjusting block to move between a first position and a second position; In the first position, the end face of the adjusting block protrudes beyond the surface of the punch; in the second position, the end face of the adjusting block is flush with the surface of the punch. The fixed mold base is provided with an injection nozzle that communicates with the cavity. The injection nozzle is coaxial with the adjustment block. When the adjustment block is in the first position, the end face of the adjustment block is close to the mouth of the injection nozzle, which is used to receive and disperse the molten metal ejected by the injection nozzle.

[0006] Furthermore, the driving component includes: The fluid cavity is formed within the moving mold base; The piston portion is slidably and sealed within the fluid cavity, and forms a liquid storage space with one side cavity of the fluid cavity; A connecting shaft, one end of which is connected to the piston part, and the other end of which passes through the punch and is connected to the adjusting block; The liquid storage space is filled with heat-conducting oil that expands in volume when heated. The heat from the molten metal in the cavity can be transferred to the heat-conducting oil to drive the piston to move the adjusting block from the first position to the second position.

[0007] Furthermore, the drive assembly also includes a return spring, which is disposed in the fluid cavity and elastically abuts against the fixed component between the piston and the moving mold base, for driving the piston to move the adjusting block from the second position to the first position when the heat transfer oil cools and contracts.

[0008] Furthermore, the fixing component includes a threaded cover disposed on the wall of the moving mold base, the moving mold base having a threaded mounting hole for threaded connection of the threaded cover, and the two ends of the return spring elastically abutting against the threaded cover and the piston part respectively in the direction of the spring force.

[0009] Furthermore, the adjusting block is rotatably provided with a rotating part at one end facing the fixed mold base, one end of the connecting shaft is rotatably passed through the adjusting block and fixedly connected to the rotating part, and the moving mold base is provided with a rotating mechanism, which is used to drive the rotating part to rotate when the connecting shaft moves linearly.

[0010] Furthermore, the rotating mechanism includes: A fixing sleeve is fixedly installed in the liquid storage space of the fluid cavity, and a spiral rolling groove is formed on the inner wall of the fixing sleeve; A rotating column is fixedly mounted on the connecting shaft. Two balls are rotatably mounted at both ends of the rotating column and roll in cooperation with the spiral rolling groove; When the connecting shaft moves linearly, the balls roll along the spiral rolling groove to drive the connecting shaft and the rotating part to rotate.

[0011] Furthermore, it also includes a locking mechanism for locking the position of the piston portion when the adjusting block moves to the second position.

[0012] Furthermore, the locking mechanism includes: A locking cylinder is installed on the moving mold base; A locking rod is connected to the output end of the locking cylinder and can be inserted into a locking hole on the piston to restrict the movement of the piston.

[0013] Furthermore, the end face of the rotating part away from the connecting shaft is flush with the end face of the adjusting block.

[0014] Furthermore, when the adjusting block is in the first position, the lateral distance between the end face of the adjusting block and the opening of the injection nozzle is less than 5 mm.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. In this invention, the adjusting block is set to protrude from the punch in the initial state, so that the distance between the end face of the adjusting block and the nozzle opening is small. This allows the molten metal sprayed from the nozzle to be dispersed by the end face of the adjusting block. The molten metal will spread radially along the end face of the adjusting block, reducing the flow rate and pressure of the molten metal entering the cavity. This reduces the phenomenon of turbulence in the molten metal in the cavity, thereby allowing air in the molten metal to escape and preventing it from being trapped in the molten metal, which would otherwise cause phenomena such as air holes in the edge cover after die casting. 2. In this invention, as the molten metal is injected into the cavity, the heat of the molten metal is transferred to the heat transfer oil, causing the heat transfer oil to expand in volume due to the heat. This causes the driving piston to move the adjusting block away from the fixed mold base, thereby gradually increasing the volume of the cavity. This increases the total amount of molten metal in the cavity, which in turn can squeeze out the air in the cavity. 3. In this invention, after die casting, the heat transfer oil shrinks in volume due to the cooling of the die-cast side cover, which causes the adjusting block to move toward the fixed mold base and extrudes the formed side cover, which helps to demold the die-cast side cover. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a die-casting molding device for producing motorcycle engine side covers according to the present invention; Figure 2 for Figure 1 A diagram illustrating the positional relationship from another perspective; Figure 3 This is a schematic diagram showing the positional relationship between the moving mold base and the fixed mold base after mold closing in this invention; Figure 4 for Figure 3 A schematic diagram showing the positional relationship of the middle section after it has been cut open; Figure 5 for Figure 4 Enlarged schematic diagram of the local structure at point A; Figure 6 for Figure 4 Enlarged schematic diagram of the local structure at point B; Figure 7 for Figure 3 Schematic diagram of the positional relationships of the central structure after explosive decomposition; Figure 8 for Figure 7 A diagram illustrating the positional relationship from another perspective; Figure 9 This is a schematic diagram of the structure of the fixing sleeve in this invention.

[0017] The following are explanations of the reference numerals in the figures: 1. Injection mechanism; 2. Injection cylinder; 3. Fixed mold platen; 4. Moving mold base; 5. Tie column; 6. Hydraulic mechanism; 7. Moving mold platen; 8. Punch; 9. Machine body; 10. Fixed mold base; 11. Cavity; 12. Locking cylinder; 13. Threaded cover; 14. Locking rod; 15. Piston part; 16. Connecting shaft; 17. Injection channel; 18. Return spring; 19. Fluid cavity; 20. Snap ring; 21. Rotating column; 22. Ball bearing; 23. Fixed sleeve; 24. Injection nozzle; 25. Adjusting block; 26. Rotating part; 27. Receiving groove; 28. Spiral rolling groove. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figures 1-9 This invention provides a technical solution: a die-casting molding device for producing motorcycle engine side covers, comprising a die-casting machine body 9, the body 9 being placed on a horizontal platform, and an injection mechanism 1 being provided at one end of the body 9, an injection cylinder 2 being mounted on the injection mechanism 1, a fixed template 3 being fixedly mounted on the body 9, and a hydraulic mechanism 6 being provided on the body 9, the output end of the hydraulic mechanism 6 driving and connecting to a moving template 7, and a fixed seat being mounted at the end of the body 9 away from the fixed template 3. (See reference...) Figure 1 and Figure 2 Multiple tie rods 5 are horizontally installed between the fixed base and the fixed template 3. The movable template 7 has multiple sliding holes, and the tie rods 5 are slidably inserted into the sliding holes respectively, so that the movable template 7 can slide freely horizontally on the multiple tie rods 5. (See reference) Figure 3 , Figure 4The movable template 7 is connected to the movable mold base 4 by screws on the side facing the fixed template 3. The movable mold base 4 is fixedly connected or integrally formed with the punch 8. The fixed template 3 is fixedly connected or integrally formed with the fixed mold base 10 on the side facing the movable template 7. When the hydraulic mechanism 6 drives the movable template 7 to move towards the fixed template 3, the movable mold base 4 and the fixed mold base 10 will close the mold. The groove opened on the surface of the fixed mold base 10 will cooperate with the punch 8 during mold closing to form a cavity 11. The cavity 11 matches the contour of the motorcycle engine side cover. Combination Figures 4 to 6 As shown, the fixed mold base 10 has an injection channel 17 on its surface, and an injection nozzle 24 is fixedly embedded in the inner wall of the cavity 11. The injection nozzle 24 communicates with the cavity 11. The surface of the punch 8 facing the fixed mold plate 3 has a recessed receiving groove 27. An adjusting block 25 is coaxially engaged in the cavity of the receiving groove 27. The adjusting block 25 has a cylindrical structure and can slide freely horizontally in the receiving groove 27. The depth dimension of the receiving groove 27 is the same as the thickness dimension of the adjusting block 25. In addition, the opening of the injection nozzle 24 is coaxial with the adjusting block 25. A fluid cavity 19 is horizontally opened in the moving mold base 4. The fluid cavity 19 is also coaxial with the receiving groove 27. A piston part 15 is coaxially engaged in the fluid cavity 19. A dynamic sealing ring is installed at one end of the piston part 15. The dynamic sealing ring is used to seal the contact surface between the periphery of the piston part 15 and the inner wall of the fluid cavity 19. The piston part 15 can slide freely horizontally in the fluid cavity 19. Combination Figures 3 to 8 As shown, a connecting shaft 16 is horizontally mounted on the moving mold base 4. One end of the connecting shaft 16 is detachably mounted on the piston part 15. Specifically, the end of the connecting shaft 16 away from the fixed mold base 10 has a small-diameter section, the outer diameter of which is smaller than the outer diameter of the connecting shaft 16. The small-diameter section slides through the piston part 15. A retaining ring groove is formed at the end of the small-diameter section away from the connecting shaft 16, and a retaining ring 20 is installed in the retaining ring groove. After the piston part 15 is fitted onto the small-diameter section, it is engaged in the retaining ring groove by the retaining ring 20, so that the retaining ring 20 can limit the piston part 15, so that the piston part 15 and the connecting shaft 16 are in a limited state in the axial direction. (Reference) Figure 5 A closed and variable volume liquid storage space is formed between the piston part 15 and the right side cavity of the fluid cavity 19. The liquid storage space stores a certain amount of heat transfer oil, which has the property of expanding when heated and contracting when cooled. refer to Figure 6One end of the connecting shaft 16 away from the piston part 15 passes through the punch 8 and slides freely. A bearing is fixedly fitted onto the end of the connecting shaft 16 that passes through the punch 8. A bearing groove is provided on the adjusting block 25 for bearing installation, allowing the connecting shaft 16 to be rotatably connected to the adjusting block 25. A threaded mounting hole is provided on the side wall of the moving mold base 4 away from the fixed mold plate 3. The threaded mounting hole communicates with the fluid cavity 19 and is coaxial. A threaded cover 13 is threaded into the threaded mounting hole to close it. A return spring 18 in a slightly compressed state is provided between the threaded cover 13 and the piston part 15. That is, the return spring 18 accumulates a certain amount of elastic potential energy in its initial state. Figures 5 to 8 As shown, the two ends of the return spring 18 elastically abut against the threaded cover 13 and the piston part 15 respectively in the direction of the elastic force. This allows the return spring 18 to drive the piston part 15 towards the fixed mold base 10 when the internal temperature of the heat transfer oil in the reservoir is low in the initial state. The piston part 15 then drives the connecting shaft 16 to move. When the connecting shaft 16 moves, it simultaneously drives the adjusting block 25 towards the fixed mold base 10, causing the adjusting block 25 to protrude onto the surface of the punch 8. The lateral distance between the adjusting block 25 and the injection nozzle 24 is small, for example, less than 5mm. This results in a greater degree of dispersion of the molten metal, reducing the flow rate and pressure of the molten metal. refer to Figure 6 A rotating part 26 is coaxially fixed to one end of the connecting shaft 16, which passes through the adjusting block 25. The adjusting block 25 has a mounting groove on its end face facing the fixed mold base 10 for the rotating part 26 to engage. The rotating part 26 can rotate freely within the mounting groove, and there is no gap between the rotating part 26 and the inner wall of the mounting groove. Furthermore, the end face of the rotating part 26 away from the connecting shaft 16 is flush with the end face of the punch 8. The rotating part 26 and the injection nozzle 24 are coaxial, and the end face of the rotating part 26 corresponds to the opening of the injection nozzle 24. After mold closing, the high-temperature molten metal is injected by the injection mechanism 1 into the injection cylinder 2, then from the injection cylinder 2 into the injection channel 17, and finally injected into the cavity 11 by the injection nozzle 24. The adjusting block 25 protrudes from the surface of the punch 8. The high-pressure molten metal ejected from the injection nozzle 24 will be directly sprayed onto the end face of the rotating part 26. Since the lateral distance between the end face of the adjusting block 25 and the end face of the injection nozzle 24 is small, that is, the lateral distance between the end face of the rotating part 26 and the end face of the injection nozzle 24 is small, after the molten metal is sprayed onto the end face of the rotating part 26, it will spread out radially along the radial direction of the rotating part 26, thereby dispersing the molten metal. This reduces the flow rate and pressure of the molten metal after it enters the cavity 11, making it less likely to form turbulence in the cavity 11, thus avoiding the influence of turbulence. In addition, after the molten metal is dispersed, the air in the molten metal will enter the cavity 11, preventing the air from being unable to escape from the molten metal. Combination Figures 5 to 9As shown, a fixed sleeve 23 is coaxially fixedly installed in the liquid storage space of the fluid cavity 19. The diameter of the central hole of the fixed sleeve 23 is larger than the outer diameter of the connecting shaft 16. A rotating column 21 is inserted through the periphery of the connecting shaft 16. The axial direction of the rotating column 21 is orthogonal to the axial direction of the connecting shaft 16, and both ends of the rotating column 21 extend out of the connecting shaft 16. A through hole is opened on the periphery of the connecting shaft 16 to allow the rotating column 21 to pass freely. A nut is threadedly fitted on one end of the rotating column 21 that extends out of the through hole. The end face of the nut abuts against the periphery of the connecting shaft 16, thereby limiting the rotating column 21 and making the rotating column 21 and the connecting shaft 16 relatively stationary. A ball bearing 22 is rotatably embedded at each end of the rotating column 21. The ball bearing 22 is located in the central hole of the fixed sleeve 23. A spiral rolling groove 28 is opened on the inner wall of the central hole of the fixed sleeve 23 to allow the ball bearing 22 to engage and roll freely. When the piston 15 moves the connecting shaft 16, the ball 22 will roll in a corresponding spiral rolling groove 28. Since the fixed sleeve 23 is fixedly installed, the ball 22 will rotate the connecting shaft 16 when it rolls in the spiral rolling groove 28. When the connecting shaft 16 rotates, it will rotate the rotating part 26. When the rotating part 26 rotates, the molten metal sprayed from the injection nozzle 24 onto the surface of the rotating part 26 will not adhere to the surface of the rotating part 26. As a result, the molten metal will not accumulate at the end of the rotating part 26 during continuous injection. In other words, if molten metal accumulates at the end of the rotating part 26 and forms a solid block, the molten metal solid block adhering to the surface of the rotating part 26 can generate shear force with the molten metal in the cavity 11 as the rotating part 26 rotates, so that the solid block can be peeled off from the end face of the rotating part 26. Combination Figure 5 and Figure 6As shown, as the amount of molten metal injected into the cavity 11 increases, the heat of the molten metal is transferred to the punch 8, and then from the punch 8 to the moving mold base 4. This heats the heat transfer oil in the reservoir space, causing its temperature to rise. Since the heat transfer oil expands when heated, it exerts a thrust on the piston 15, causing it to move away from the fixed mold base 10. Simultaneously, the piston 15 drives the connecting shaft 16 and the adjusting block 25 to move away from the fixed mold base 10, thus causing the adjusting block 25 and the rotating part to move further away from the fixed mold base 10. As the end face of the rotating part 26 gradually becomes flush with the surface of the punch 8, the adjusting block 25 and the piston part 15 move in a direction away from the fixed mold base 10, simultaneously driving the connecting shaft 16 to move. The movement of the connecting shaft 16 causes the rotating column 21 to move synchronously, causing the ball 22 to roll within the spiral rolling groove 28. This allows the solid metal block adhering to the end face of the rotating part 26 to be peeled off, avoiding any impact on the dispersion of the molten metal within the cavity 11. Furthermore, in the early stage of injection, the adjusting block 25 protrudes to the surface of the punch 8, resulting in a smaller volume within the cavity 11. This results in a smaller amount of air stored in the cavity 11. Specifically, when the injection mechanism 1 injects molten metal into the cavity 11, the smaller volume of the cavity 11 allows for less air storage. Consequently, the air in the cavity 11 can be expelled promptly during molten metal injection. As the adjusting block 25 moves away from the fixed mold base 10, the volume of the cavity 11 increases, leading to a larger total amount of molten metal in the cavity 11. This causes the molten metal to compress the air in the cavity 11, allowing the air to escape as the injection nears completion. Under the pressure of the molten metal, it is discharged from the nozzle 24 to the outside of the cavity 11. Alternatively, a single or a small number of venting grooves can be provided on the fixed mold base 10 so that air is squeezed into the venting grooves and discharged from them. This reduces the impact of an excessive number of venting grooves on the surface quality of the die-cast product. In addition, when the piston 15 moves away from the fixed mold base 10, it will compress the return spring 18, making the return spring 18 more compressed than in the initial state and accumulating a large amount of elastic potential energy. Combination Figure 3 , Figure 4 , Figure 5 , Figure 7 and Figure 8As shown, a locking cylinder 12 is vertically mounted on the top of the moving mold base 4. The cylinder rod of the locking cylinder 12 is coaxially fixedly connected to a connecting part. A locking rod 14 is coaxially fixed to the lower end of the connecting part. The locking rod 14 is vertically and slidably inserted into the moving mold base 4, and the lower end of the locking rod 14 is inserted into the fluid cavity 19. A locking hole for the locking rod 14 to be inserted is opened on the periphery of the piston part 15. After the piston part 15 moves to the position away from the fixed mold base 10, the surfaces of the adjusting block 25 and the rotating part 26 are flush with the surface of the punch 8. At this time, the operation is started. Locking cylinder 12 has an extended cylinder rod that drives locking rod 14 downward, causing its lower end to insert into locking hole to limit piston part 15. This prevents the heat transfer oil from shrinking in volume as the temperature drops during the process of molten metal injection and cooling / solidification. This prevents the connecting shaft 16 from moving towards the fixed mold base 10 before the die-cast engine side cover has fully cooled and solidified. Consequently, the adjusting block 25 and rotating part 26 press against the surface of the engine side cover. This causes damage to the surface of the side cover. After cooling and solidification, the locking cylinder 12 is activated again. The cylinder rod of the locking cylinder 12 retracts, causing the locking rod 14 to move upward, so that the lower end of the locking rod 14 disengages from the locking hole. This causes the piston part 15 to lose the limiting effect of the locking rod 14. At this time, under the action of the release of the elastic potential energy stored in the return spring 18 and the action of the heat transfer oil shrinking due to cooling, the piston part 15 will move towards the adjacent fixed mold base 10, thereby causing the connecting shaft 16 to drive the adjusting block 25 and the rotating part 26. The movement allows the moving template 7 and the fixed template 3 to separate, enabling the rotating part 26 and the adjusting block 25 to protrude onto the surface of the punch 8 and exert pressure on the die-cast engine side cover, thus allowing the side cover to be quickly demolded. Furthermore, as the connecting shaft 16 moves, the ball bearings 22 will roll within the spiral rolling groove 28, allowing the rotating part 26 to rotate. Through the rotation of the rotating part 26, the surface of the rotating part 26 and the surface of the die-cast side cover can be quickly separated, further facilitating the demolding of the die-cast engine side cover.

[0020] Working principle of the invention: The hydraulic mechanism 6 drives the moving template 7 to move towards the fixed template 3, thereby causing the punch 8 to engage in the groove and form the cavity 11. The injection mechanism 1 injects the molten aluminum ingot into the injection channel 17 at a slow injection speed, and continues to inject into the injection nozzle 24, and injects it into the cavity 11 under high pressure to ensure that the molten metal has a certain injection time. At this time, the adjusting block 25 protrudes from the surface of the punch 8. The position of the adjusting block 25 at this time is defined as the first position. The high-pressure molten metal ejected from the injection nozzle 24 will be directly sprayed onto the end face of the rotating part 26. Due to the adjusting block The lateral distance between the end face of the rotating part 26 and the end face of the injection nozzle 24 is small, that is, the lateral distance between the end face of the rotating part 26 and the end face of the injection nozzle 24 is small. At this time, after the molten metal is sprayed onto the end face of the rotating part 26, it will spread out radially along the radial direction of the rotating part 26, thereby dispersing the molten metal. This reduces the flow rate and pressure of the molten metal after it enters the cavity 11, making it less likely to form turbulence in the cavity 11, thus avoiding the influence of turbulence. In addition, after the molten metal is dispersed, the air in the molten metal will enter the cavity 11, preventing the air from being unable to escape from the molten metal. After the heat from the molten metal in cavity 11 is transferred to the heat transfer oil, the heat transfer oil is rapidly heated and expands in volume, driving the piston 15 to move away from the fixed mold base 10. This causes the adjusting block 25 and the rotating part 26 to gradually move away from the fixed mold base 10, thereby gradually increasing the volume within cavity 11. When the molten metal injection is complete, the rotating part 26 and the adjusting block 25 are in position, and at this point, the end face of the rotating part 26, the adjusting block 25, and the surface of the punch 8 are flush (the total travel of the adjusting block 25 is relatively small). The position of the adjusting block 25 at this point is defined as the second position. Then, the locking cylinder 12 is activated. The cylinder rod of the locking cylinder 12 extends and drives the lower end of the locking rod 14 to insert into the locking hole to limit the piston part 15. After cooling and solidification, the moving mold base 4 and the fixed mold base 10 move away from each other. The locking cylinder 12 is activated again, and the cylinder rod of the locking cylinder 12 shortens, thereby driving the locking rod 14 to move upward and disengage from the locking hole. This releases the elastic potential energy of the return spring 18 and the volume of the heat transfer oil shrinks, thereby causing the piston part 15 to drive the connecting shaft 16 to move towards the fixed mold base 10. This causes the adjusting block 25 and the rotating part 26 to squeeze out the die-cast side cover, achieving convenient demolding.

[0021] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A die-casting molding device for producing motorcycle engine side covers, comprising a body (9), an injection mechanism (1) disposed at one end of the body (9), a fixed template (3) fixed to the body (9), and a movable template (7) driven by a hydraulic mechanism (6) to move toward or away from the fixed template (3). The fixed template (3) is provided with a fixed mold base (10), and the moving template (7) is provided with a moving mold base (4). The fixed mold base (10) and the moving mold base (4) are respectively provided with a groove and a punch (8) for forming a cavity (11) on their opposite surfaces. Its features are, Also includes: Adjusting block (25), the punch (8) has a receiving groove (27) on its surface facing the fixed mold base (10), the adjusting block (25) is movably disposed in the receiving groove (27) and can switch between a first position and a second position; A drive assembly is disposed within the moving mold base (4) and is connected in a transmission manner to the adjusting block (25) for driving the adjusting block (25) to move between a first position and a second position; In the first position, the end face of the adjusting block (25) protrudes beyond the surface of the punch (8); in the second position, the end face of the adjusting block (25) is flush with the surface of the punch (8); The fixed mold base (10) is provided with an injection nozzle (24) that communicates with the cavity (11). The injection nozzle (24) is coaxial with the adjustment block (25). When the adjustment block (25) is in the first position, the end face of the adjustment block (25) is close to the mouth of the injection nozzle (24) to receive and disperse the molten metal ejected by the injection nozzle (24).

2. The die-casting molding apparatus for producing motorcycle engine side covers according to claim 1, characterized in that, The driving component includes: A fluid cavity (19) is formed within the moving mold base (4); The piston part (15) is slidably and sealed inside the fluid cavity (19) and forms a liquid storage space with one side cavity of the fluid cavity (19); A connecting shaft (16) is provided, one end of which is connected to the piston part (15), and the other end passes through the punch (8) and is connected to the adjusting block (25). The liquid storage space is filled with heat-conducting oil that expands in volume when heated. The heat of the molten metal in the cavity (11) can be transferred to the heat-conducting oil to drive the piston (15) to move the adjusting block (25) from the first position to the second position.

3. The die-casting molding apparatus for producing motorcycle engine side covers according to claim 2, characterized in that, The drive assembly also includes a reset spring (18), which is disposed in the fluid cavity (19) and elastically abuts against the fixed part of the piston part (15) and the moving mold base (4). When the heat transfer oil cools and shrinks, the reset spring (18) drives the piston part (15) to move the adjusting block (25) from the second position to the first position.

4. The die-casting molding apparatus for producing motorcycle engine side covers according to claim 3, characterized in that, The fixing component includes a threaded cover (13) provided on the wall of the moving mold base (4). The moving mold base (4) has a threaded mounting hole for threaded connection of the threaded cover (13). The return spring (18) elastically abuts against the threaded cover (13) and the piston part (15) at both ends in the elastic direction.

5. A die-casting molding apparatus for producing motorcycle engine side covers according to claim 2, characterized in that... The adjusting block (25) is rotatably provided with a rotating part (26) at one end facing the fixed mold base (10). One end of the connecting shaft (16) is rotatably passed through the adjusting block (25) and fixedly connected to the rotating part (26). The moving mold base (4) is provided with a rotating mechanism. The rotating mechanism is used to drive the rotating part (26) to rotate when the connecting shaft (16) moves linearly.

6. The die-casting molding apparatus for producing motorcycle engine side covers according to claim 5, characterized in that, The rotating mechanism includes: A fixed sleeve (23) is fixedly installed in the liquid storage space of the fluid cavity (19), and a spiral rolling groove (28) is provided on the inner wall of the fixed sleeve (23). The rotating column (21) is fixedly installed on the connecting shaft (16); Two balls (22) are rotatably mounted at both ends of the rotating column (21) and roll in cooperation with the spiral rolling groove (28); When the connecting shaft (16) moves linearly, the ball (22) rolls along the spiral rolling groove (28) to drive the connecting shaft (16) and the rotating part (26) to rotate.

7. The die-casting molding apparatus for producing motorcycle engine side covers according to claim 2, characterized in that, It also includes a locking mechanism for locking the position of the piston (15) when the adjusting block (25) moves to the second position.

8. The die-casting molding apparatus for producing motorcycle engine side covers according to claim 7, characterized in that, The locking mechanism includes: A locking cylinder (12) is installed on the moving mold base (4); The locking rod (14) is connected to the output end of the locking cylinder (12) and can be inserted into the locking hole opened on the piston part (15) to restrict the movement of the piston part (15).

9. A die-casting molding apparatus for producing motorcycle engine side covers according to claim 5, characterized in that, The end face of the rotating part (26) away from the connecting shaft (16) is flush with the end face of the adjusting block (25).

10. A die-casting molding apparatus for producing motorcycle engine side covers according to claim 5, characterized in that, When the adjusting block (25) is in the first position, the lateral distance between the end face of the adjusting block (25) and the mouth of the injection nozzle (24) is less than 5 mm.

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