A large magnesium alloy thixomolding die set and die casting machine with double-sided slurry preparation

Abstract

The application discloses a large magnesium alloy thixomolding die set and die casting machine with double-side slurry preparation, relates to the technical field of die casting machines, and comprises a die plate, a pressure injection mechanism, a pair of molten material conveying mechanisms and a tensioning mechanism. The die plate is fixedly installed on the inner side of a die casting machine head plate, and the die casting die is suitable for being installed on the die plate. The pressure injection mechanism penetrates through the die casting machine head plate along a first direction and is fixedly installed on the die plate, and the pressure injection mechanism is connected with a die casting machine pressure injection unit. The molten material conveying mechanisms are symmetrically and slidingly installed on the two sides of the die plate along a second direction. The tensioning mechanism comprises a connecting rod assembly and an elastic assembly. The die casting machine comprises the above-mentioned die set. The double-side slurry preparation process can meet the production requirements of continuous and stable molding of large magnesium alloy components. The injection head keeps stable tensioning force through cooperation of the elastic assembly and the connecting rod assembly, and can be self-adaptively tensioned. The tensioning mechanism is arranged on the outer side of the molten material conveying mechanism, which is beneficial to compact layout of the equipment.

Description

Technical Field

[0001] This application relates to the field of die casting machine technology, and in particular to a large magnesium alloy thixotropic molding module with double-sided slurry preparation and a die casting machine. Background Technology

[0002] Magnesium alloys are ideal lightweight metals, lighter than aluminum alloys, while possessing similar high strength and high rigidity. With the continuous narrowing of the price ratio between magnesium and aluminum and the improvement of magnesium alloy processing and die-casting technology, they have become the main raw material for automotive parts, offering significant advantages in lightweighting automotive components.

[0003] In existing technologies, as can be referenced in Chinese patent CN119456996B, the preparation of semi-solid magnesium alloy slurry currently primarily employs a barrel-screw feeding method. However, this method has the following drawbacks: due to limitations in material properties and processing technology, the length and diameter of the barrel and screw have upper limits, failing to meet the industrial production requirements of large magnesium alloy components. Increasing the length and diameter of the barrel and screw significantly increases the screw weight, making it difficult to achieve sufficiently high casting pressure and dynamic casting response. Furthermore, the hydraulic injection head of this barrel-screw achieves tensioning by pushing the mandrel with a thrust cylinder. This tensioning mechanism requires continuous thrust output from the cylinder for balancing, resulting in high energy consumption and the risk of insufficient tensioning force due to oil leakage and pressure loss. Therefore, how to improve existing magnesium alloy thixotropic molding modules to overcome these problems is a problem urgently needing to be solved by those skilled in the art. Summary of the Invention

[0004] One objective of this application is to provide a large magnesium alloy thixotropic molding module with double-sided pulping.

[0005] Another object of this application is to provide a die-casting machine.

[0006] To achieve the above objectives, the technical solution adopted in this application is as follows: a large magnesium alloy thixotropic molding module with double-sided slurry preparation, comprising a template, an injection mechanism, a pair of molten material conveying mechanisms, and a tensioning mechanism. The template is fixedly installed inside the die-casting machine head plate, and the die-casting mold is adapted to be installed on the template. The injection mechanism passes through the die-casting machine head plate along a first direction and is fixedly installed on the template, and the injection mechanism is connected to the die-casting machine injection unit. The molten material conveying mechanisms are symmetrically slidably installed on both sides of the template along a second direction, and the injection head of the molten material conveying mechanism cooperates with the injection mechanism. The first direction and the second direction are perpendicular to each other. The tensioning mechanism includes a connecting rod assembly and an elastic component. The two ends of the connecting rod assembly are respectively connected to the outer sides of the two molten material conveying mechanisms. The elastic component is at least disposed at one end of the connecting rod assembly and connected to the molten material conveying mechanism. The elastic component is adapted to provide a pre-tightening force to the two molten material conveying mechanisms synchronously and close to each other through the connecting rod assembly, so that the injection head is tensioned and sealed to the injection mechanism.

[0007] Preferably, the molten material conveying mechanism is externally fixed to a frame; the elastic component includes an elastic element, a guide rod, and a connecting pipe. The connecting pipe is fixed to the frame, the guide rod is inserted into the axis of the connecting pipe, the elastic element is located inside the connecting pipe and its two ends are respectively abutted against the frame and the first end of the guide rod, the second end of the guide rod is connected to the connecting rod assembly, and the elastic element is in a compressed energy storage state.

[0008] Preferably, one end of the connecting rod assembly is connected to the molten material conveying mechanism via the elastic component. The elastic component includes multiple disc springs coaxially stacked and sleeved on the guide rod. At least one disc spring assembly is sleeved on the outside of the guide rod. The disc spring assembly includes four disc springs arranged in sequence: a first disc spring, a second disc spring, a third disc spring, and a fourth disc spring. The conical surfaces of the first and second disc springs face the same direction to form a first disc spring group, and the conical surfaces of the third and fourth disc springs face the same direction to form a second disc spring group. The conical surfaces of the first disc spring group and the second disc spring group face opposite directions.

[0009] Preferably, the second end of the guide rod is connected to the connecting rod assembly via a threaded connection; and the initial preload is preset by adjusting the thread engagement length.

[0010] Preferably, a telescopic device is installed on the frame or the connecting pipe, and the output end of the telescopic device corresponds to the guide rod; the telescopic device is adapted to extend through the output end and abut against the guide rod, thereby driving the molten material conveying mechanism to move in a direction away from the template.

[0011] Preferably, the template is provided with an installation groove along the first direction, the installation groove including a first groove and a second groove that are coaxially connected, the diameter of the second groove being larger than the diameter of the first groove; a fixing flange is installed at the first end of the injection cylinder of the injection mechanism; during installation, the injection cylinder passes through the second end into the installation groove until the fixing flange engages with the second groove, and a cover plate flush with the template is installed in the second groove, so that the injection cylinder forms a stop and lock engagement with the template in the first direction.

[0012] Preferably, a pressure rod is movably provided at the second end of the injection cylinder, and a housing is sleeved at the joint between the injection cylinder and the pressure rod. The housing is suitable for being filled with inert gas, thereby forming a gas protective layer that isolates oxygen.

[0013] Preferably, the discharge pipe is vertically installed on the barrel of the molten material conveying mechanism and communicates with it. A feeding component is connected to the top of the discharge pipe. A preheating component is sleeved on the outside of the discharge pipe. The discharge pipe has a preheating section, and the preheating component covers at least the entire length of the preheating section. Thus, the metal material in the feeding component is heated to a preset temperature by the preheating component as it passes through the preheating section under the action of gravity.

[0014] Preferably, a diverting rod is installed at the center of the discharge pipe, and the diverting rod extends at least through the preheating pipe section, thereby forming an annular channel for metal materials to pass through between the outer side of the diverting rod and the inner side of the preheating pipe section.

[0015] A die-casting machine comprising the aforementioned large magnesium alloy thixotropic molding module with double-sided slurry preparation.

[0016] Compared with the prior art, the beneficial effects of this application are as follows: The molding module of this invention can be used with a die-casting machine. It is installed on the head plate of the die-casting machine and docks with the injection unit of the die-casting machine. That is, it can be adapted to use by modifying the existing die-casting machine, which is highly flexible. The molten material conveying mechanism is configured on both sides of the molding template, thereby realizing the double-sided slurry preparation process of the large magnesium alloy thixotropic molding module. This breaks through the size and capacity limitations of a single set of molten material conveying mechanism. It can meet the production requirements of continuous and stable molding of large magnesium alloy components without increasing the size of a single set of equipment. Through the setting of the tensioning mechanism, the injection head can always maintain the tensioning force within the set range, without the need for the hydraulic cylinder to continuously output thrust to maintain the tensioning state. Even when the equipment is stopped, it can still provide a stable and reliable force to ensure the safety of equipment operation. In addition, the tensioning mechanism maintains the tensioning force through a mechanical elastic energy storage structure. As the molten material conveying mechanism heats up and deforms, it can automatically achieve adaptive tensioning on both sides. Moreover, the tensioning mechanism is set on the outside of the molten material conveying mechanism, that is, it does not need to be set at the axial end position of the molten material conveying mechanism, which is conducive to the compact layout of the equipment. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the magnesium alloy thixotropic molding module of the present invention when it is installed in a die-casting machine.

[0018] Figure 2 for Figure 1 A top-view structural diagram.

[0019] Figure 3 This is a schematic diagram of the two-sided molten material conveying mechanism of the present invention when it is engaged by a tensioning mechanism.

[0020] Figure 4 This is a schematic diagram of the overall three-dimensional structure of the tensioning mechanism of the present invention.

[0021] Figure 5 This is a schematic diagram of the structure of adjacent rods of the present invention when they are installed by a connecting assembly.

[0022] Figure 6 This is a schematic diagram of the overall structure of the elastic component of the present invention.

[0023] Figure 7 This is an exploded structural diagram of the elastic component of the present invention.

[0024] Figure 8 This is a partial cross-sectional view of the elastic component of the present invention.

[0025] Figure 9 for Figure 8 A magnified structural diagram at point A in the diagram.

[0026] Figure 10 This is a schematic diagram illustrating the principle of the barrel of the present invention being tensioned by the elastic component and the connecting rod assembly.

[0027] Figure 11 This is a schematic diagram illustrating the principle of the separation of the barrel under the action of the telescopic device according to the present invention.

[0028] Figure 12 This is a schematic diagram of the overall structure of the injection assembly of the present invention.

[0029] Figure 13 This is a schematic diagram of the structure of the injection assembly and the injection cylinder of the present invention.

[0030] Figure 14 This is a schematic diagram of the housing of the present invention installed at the mating connection between the injection assembly and the injection barrel.

[0031] Figure 15 This is a schematic diagram of the structure of the two half-shells of the present invention when they are installed together by a locking structure.

[0032] Figure 16 This is a cross-sectional view of the connection between the injection assembly and the injection barrel of the present invention.

[0033] Figure 17 This is a cross-sectional view of the integrated molding injection cylinder of the present invention installed at the template.

[0034] Figure 18 This is a partial structural diagram of the end of the injection cylinder of the present invention.

[0035] Figure 19 This is a front view schematic diagram of the fixed flange of the present invention installed in the mounting groove.

[0036] Figure 20 This is a partial structural diagram of the preheating component of the present invention installed at the feeding component.

[0037] Figure 21 This is a schematic cross-sectional view of the discharge pipe of the present invention along the vertical direction.

[0038] Figure 22 This is a schematic cross-sectional view of the discharge pipe of the present invention along the horizontal direction.

[0039] In the diagram: 1. Die-casting machine; 101. Die-casting machine head plate; 102. Die-casting machine injection unit; 2. Molten material conveying mechanism; 201. Barrel; 202. Injection head; 203. Feeding assembly; 204. Preheating assembly; 205. Discharge pipe; 2051. Preheating pipe section; 206. Screw; 3. Injection assembly; 301. Template; 302. Injection barrel; 3021. Injection port; 303. Injection assembly; 304. Fixed flange; 3041. Observation port; 4. Connecting rod assembly; 401. Rod body; 4011. Snap-fit ​​part; 5. Elastic component; 501. Elastic element; 5011. Disc spring; 502. Guide rod; 503. Connection 6. Pipe; 7. Connecting assembly; 8. Half hoop; 9. Snap-fit ​​groove; 10. Frame; 11. Sensing module; 22. Telescopic device; 33. Housing; 44. Half-shell; 55. Observation window; 66. Slag discharge port; 77. Air inlet; 88. Locking structure; 9. Mounting bracket; 1001. First ring body; 11. Second ring body; 12. Connecting piece; 13. Mounting groove; 14. First groove body; 15. Second groove body; 16. Limiting structure; 17. Limiting block; 18. Limiting groove; 19. Sealing plate; 20. Diverting rod; 21. Conical part; 22. Support plate; 23. Annular channel. Detailed Implementation

[0040] The present application will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0041] In the description of this application, it should be noted that the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., which indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and should not be construed as limiting the specific protection scope of this application.

[0042] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0043] Further description of existing technology: Currently, most magnesium alloy parts production still uses traditional cold chamber die-casting machines, equipped with magnesium alloy melting furnaces, operating at temperatures of 650℃-680℃. This process melts magnesium alloy blocks into a liquid state and maintains this state for extended periods, resulting in high energy consumption. Liquid magnesium alloys are highly susceptible to oxidation and combustion, necessitating the continuous use of environmentally harmful protective gases such as SF6 after melting. However, this does not completely prevent magnesium alloys from contacting air, and some still burns during the feeding process, producing large amounts of toxic and harmful gases, which are detrimental to the health of die-casting workers and cause significant environmental pollution. Therefore, the preparation of semi-solid magnesium alloy slurry currently employs a safer and less energy-intensive screw slurry process, specifically a barrel-screw feeding method.

[0044] Description of the shortcomings of screw-type slurry preparation technology: Currently, most processes employ a single-sided slurry preparation mode, where only a single barrel and screw are used to prepare and transport magnesium alloy slurry. However, due to limitations in current machining technology, the size and weight of the barrel 201 and screw 206 have manufacturing limits. It is difficult to increase the slurry output per unit time by enlarging the size of individual equipment, thus failing to meet the production requirements for continuous molding of large magnesium alloy components. If the size of individual equipment is forcibly enlarged, not only will the equipment manufacturing cost increase significantly, but the increased weight of the screw 206 will also reduce the dynamic response speed of the injection process, making it difficult to guarantee the casting process parameters required for the molding process, ultimately affecting the molding quality of large components.

[0045] Therefore, the inventors of this application have developed a large magnesium alloy thixotropic molding module employing double-sided slurry preparation, one embodiment of which is, for example... Figures 1 to 22 As shown, this application takes the installation of the magnesium alloy thixotropic molding module on the die-casting machine 1 as an example for specific explanation. Of course, it is not limited to installation on the die-casting machine 1. Those skilled in the art can also adapt and install it on other types of molding and processing equipment according to actual production needs.

[0046] Specifically, the magnesium alloy thixotropic molding module includes a pair of melt conveying mechanisms 2 and an injection assembly 3. The melt conveying mechanism 2 includes a barrel 201, a screw 206, an injection head 202, and a feeding assembly 203. The injection assembly 3 includes a template 301, an injection mechanism, and a fixed flange 304. The injection mechanism includes an injection cylinder 302 and an injection assembly 303. The template 301 is fixedly installed on the die-casting machine head plate 101, and the injection cylinder 302 passes through the die-casting machine head plate. The injection unit 303 is installed on the template 301, and the injection assembly 303 is placed inside the injection cylinder 302. The injection nozzle is installed at the front end of the injection cylinder 302. The tail end of the injection assembly 303 is connected to the injection unit 102 of the die casting machine. The die casting mold is installed on the template 301, and the injection nozzle is connected to the mold inlet. The semi-solid magnesium material is placed inside the injection cylinder 302. The axial reciprocating motion of the injection assembly 303 is controlled by the injection unit 102 of the die casting machine to inject the magnesium material into the mold. The barrel 201 is slidably mounted on both sides of the template 301 via linear guide rails and is arranged symmetrically. The feeding assembly 203 is connected and mounted on the barrel 201. The injection head 202 is mounted on the front end of the barrel 201 and is connected to the injection port 3021 on the injection cylinder 302. The screw 206 is movably mounted inside the barrel 201 and is fixed to the output end of the conveying power assembly. The power output from the conveying power assembly drives the screw 206 to rotate, thereby conveying the magnesium material. The molten material conveying mechanism 2 is connected to the conveying power assembly by a push-pull cylinder. The axial reciprocating motion of the screw 206 inside the barrel 201 can be achieved by controlling the extension and retraction of the push-pull cylinder, thereby controlling the opening and closing of the injection port 3021.

[0047] It should be noted that how the molten material conveying mechanism 2 (i.e., the slurry preparation equipment) melts and conveys the magnesium alloy particles, and how the injection assembly 3 injects the molten magnesium alloy into the mold for molding, are common knowledge known to those skilled in the art, and therefore their specific structures and principles will not be elaborated upon further. Of course, this application is not limited to thixotropic molding of magnesium alloy materials, and those skilled in the art can adapt this device for injection molding of other metal materials according to actual production needs.

[0048] Understandably, during magnesium alloy injection molding, both sides of the molten material conveying mechanism 2 can deliver magnesium alloy slurry into the injection cylinder 302. This significantly increases the output of magnesium alloy slurry per unit time without increasing the size of a single set of equipment, which can meet the total slurry supply requirements during the molding of large magnesium alloy components. Of course, it is also possible to choose to use only one side of the molten material conveying mechanism 2 for material supply according to actual production needs.

[0049] Specifically, there are three main methods for dual-sided slurry feeding. The first feeding mode involves both molten material conveying mechanisms 2 simultaneously feeding magnesium alloy slurry into the injection cylinder 302. This mode is suitable for large components with large cross-sectional dimensions and long slurry filling strokes. It can quickly complete cavity filling while ensuring slurry temperature uniformity, avoiding premature solidification of semi-solid slurry that affects molding quality, and maximizing the slurry supply per unit time, making it suitable for the molding production of large-tonnage components. The second feeding mode involves only one molten material conveying mechanism 2 feeding slurry into the injection cylinder 302, while the other molten material conveying mechanism 2 remains in standby mode. This mode is suitable for the batch molding production of small and medium-sized magnesium alloy components. In this case, full-load feeding is not required; single-sided feeding is sufficient to meet the slurry demand. The third feeding mode involves sequential feeding from both sides, which can reach the module's maximum melting capacity.

[0050] Further optimization, such as Figure 2 and Figure 3 As shown, two molten material conveying mechanisms 2 are arranged along the second direction on both sides of the template 301, and their axes coincide; while the injection assembly 3 is arranged along the first direction, wherein the first direction and the second direction are perpendicular. The axes of the two molten material conveying mechanisms 2 pass exactly through the axis of the injection cylinder 302. This arrangement allows the forces exerted on the injection cylinder 302 by the pulping equipment on both sides to interact along the axial direction, so that the force on the injection cylinder 302 is located exactly on both sides of the center, thereby improving stability. It should be noted that the first direction is the Y direction, i.e., the horizontal longitudinal direction; the second direction is the X direction, i.e., the horizontal transverse direction.

[0051] In one embodiment of this application, such as Figure 3 and Figure 4 As shown, a tensioning mechanism can be provided between the molten material conveying mechanism 2 and the template 301. The tensioning mechanism includes a connecting rod assembly 4 and an elastic component 5. The elastic component 5 includes an elastic element 501, a guide rod 502, and a connecting pipe 503. A frame 7 is fixedly installed on the outside of the molten material conveying mechanism 2. The first end of the connecting rod assembly 4 passes through the template 301 and is connected to the molten material conveying mechanism 2 on the left side. The connecting pipe 503 is horizontally fixedly installed on the frame 7. The guide rod 502 is horizontally inserted into the axis of the connecting pipe 503. The two ends of the elastic element 501 are respectively abutted and fitted on the frame 7 and the right end of the guide rod 502. The left end of the guide rod 502 is connected to the right end of the connecting rod assembly 4, and the elastic element 501 is in a compressed energy storage state.

[0052] It should be noted that the first end of the linkage assembly 4 is the left end and the second end is the right end; while the elastic component 5 can also be set at both ends of the linkage assembly 4. In this embodiment, a single elastic component 5 is set at the right end of the linkage assembly 4 as an example.

[0053] It is understandable that, such as Figure 10As shown, the elastic component 5 is located on the right side of the molten material conveying mechanism 2. Let the horizontal elastic forces generated at both ends of the elastic component 5 be F1 and F2. That is, the elastic component 501 will generate opposite elastic forces on the guide rod 502 and the frame 7. F1 acts on the connecting rod assembly 4, which pulls the left side of the molten material conveying mechanism 2, causing the left injection head 202 to tighten and adhere to the injection cylinder 302 inside the template 301. Simultaneously, F2 acts directly on the right side of the molten material conveying mechanism 2, generating a thrust that causes the right injection head 202 to also tighten and adhere to the injection cylinder 302 inside the template 301. Ultimately, both injection heads 202 can simultaneously receive a tightening force towards the template 301.

[0054] Specifically, such as Figure 10 As shown, let the initial compressed length of the elastic component 5 be L. During metal injection molding, the barrel 201 of the molten material conveying mechanism 2 generates high temperatures. According to the principle of thermal expansion and contraction, the overall length of the barrel 201 will elongate due to heat. The connecting rod assembly 4, located outside the barrel 201, will not elongate due to heat; therefore, the connecting rod assembly 4 can be considered a rigid, fixed-length structure. Thus, the elongated barrel 201 compresses the length of the elastic component 5, reducing L and automatically compensating for the elongation of the barrel 201. This ensures that the injection heads 202 of the two molten material conveying mechanisms 2 always maintain a tension force within a set range, eliminating the need for continuous hydraulic cylinder output to maintain tension. This reduces energy consumption and avoids the risk of oil leakage and pressure depletion caused by long-term hydraulic cylinder operation. Furthermore, this tensioning mechanism uses mechanical elasticity to maintain a stable tension force, resulting in a simple and reliable structure. Even when the equipment is off, it can apply a reliable force, fully ensuring safety.

[0055] This application does not limit the specific structure of the elastic element 501. The following is a specific embodiment for reference: like Figures 7 to 9 As shown, the elastic element 501 consists of multiple disc springs 5011, which are coaxially stacked and sleeved on the outside of the guide rod 502, and adjacent disc springs 5011 are kept in close contact with each other. Of course, the elastic element 501 can also be a regular spring (i.e., a cylindrical helical spring), but it has the following disadvantages: (1) Low space efficiency: its stroke is large, which in turn occupies a large axial space; (2) Easy to relax: it is easy to relax under long-term heavy load, resulting in a decrease in preload; (3) Inconvenient maintenance: it needs to be replaced as a whole when damaged. Therefore, disc springs 5011 are preferred, which have the advantages of small space, large load and high stiffness.

[0056] It should be noted that the disc spring 5011 can be used individually or in combination in pairs, and there are various ways to combine them, including but not limited to the following three: The first combination is stacking (parallel connection), where all disc springs 5011 are stacked in the same direction, meaning the conical surfaces of the disc springs 5011 face the same direction. The total load is the sum of the load-bearing capacities of individual disc springs 5011, and the deformation is the same as that of a single disc spring 5011. The stiffness increases with the number of disc springs 5011.

[0057] The second combination is a series arrangement, where disc springs 5011 are stacked alternately, one facing forward and the other backward, meaning the conical surfaces of the disc springs 5011 face opposite directions. The total deformation is the sum of the deformations of individual disc springs 5011, and the load-bearing capacity is the same as that of a single disc spring 5011.

[0058] The third combination: composite (hybrid), first stack multiple disc springs 5011 into a group, and then combine multiple groups; flexible combination, which can take into account both load-bearing capacity and compression.

[0059] Based on the above three combinations of disc springs 5011, in one embodiment of this application, a composite combination is preferred, which achieves a large compression amount while ensuring sufficient load-bearing capacity, enough to compensate for the dimensional changes caused by the thermal expansion of the barrel 201. Specifically, as shown... Figure 9 As shown, at least one disc spring assembly is sleeved on the outside of the guide rod 502. This disc spring assembly includes four disc springs arranged sequentially from left to right: a first disc spring, a second disc spring, a third disc spring, and a fourth disc spring. The first and second disc springs have the same cone surface orientation to form a first disc spring group, satisfying the requirements for stacking and combining. This allows the load-bearing capacity of the first disc spring group to be doubled compared to a single disc spring 5011, while maintaining the deformation of a single disc spring 5011, resulting in higher stiffness. Similarly, the third and fourth disc springs have the same cone surface orientation to form a second disc spring group, also increasing the load-bearing capacity and stiffness. The first and second disc spring groups have opposite cone surface orientations, satisfying the requirements for mating and combining. The total deformation is the sum of the deformations of the two disc spring groups, ensuring both overall load-bearing capacity and a larger compression stroke. Those skilled in the art can select the appropriate number of disc spring assemblies based on actual conditions to meet the different degrees of thermal elongation compensation requirements of the adaptable barrel 201.

[0060] like Figure 3 As shown, the connecting rod assembly 4 is installed through the template 301, and the overall length of the connecting rod assembly 4 is relatively long. If the connecting rod assembly 4 is processed into a straight rod, it will not only be difficult to process, but also inconvenient to transport and install. In addition, if local deformation or damage occurs, the whole assembly must be replaced, resulting in high maintenance costs.

[0061] Therefore, in order to solve the above-mentioned technical problems, in one embodiment of this application, such as Figure 4As shown, the connecting rod assembly 4 includes multiple rods 401, and adjacent rods 401 are detachably floatingly connected by connecting components 6. This structure allows for segmented batch processing of the rods 401, reducing processing difficulty and facilitating transportation and installation. If a section of rod 401 is deformed or damaged, only the corresponding section needs to be replaced, effectively reducing maintenance costs. Simultaneously, the floating connection compensates for coaxiality errors during the mating of adjacent rods 401. Furthermore, in actual use, it provides a certain amount of redundancy for the installation, adjustment, and deformation of the connecting rod assembly 4, preventing assembly stress or jamming throughout the connecting rod.

[0062] Specifically, such as Figure 5 As shown, the connecting assembly 6 includes a pair of detachable and installable semi-hoops 601. The two semi-hoops 601 can be locked together with bolts at the connection position of two adjacent rods 401. Each semi-hoop 601 has a snap-fit ​​groove 6011 on its opposite side, and the end of the rod 401 is provided with a radially protruding snap-fit ​​part 4011. After the two semi-hoops 601 are locked together, the snap-fit ​​parts 4011 at the ends of the two adjacent rods 401 are respectively snapped into the snap-fit ​​grooves 6011 on both sides, achieving reliable positioning. At the same time, the inner diameter of the snap-fit ​​groove 6011 is slightly larger than the outer diameter of the snap-fit ​​part 4011, so that a small movement gap can be maintained between adjacent rods 401, achieving the installation requirements of floating fit. The structure is simple, easy to disassemble and assemble, and easy to maintain.

[0063] Further preferably, the snap-fit ​​part 4011 adopts a circular structure, that is, the snap-fit ​​part 4011 is an annular flange integrally machined from the end of the rod 401. This structure is easy to process, and the rod 401 can also be rotated and adjusted in the circumferential direction, further improving the flexibility during actual installation.

[0064] In this embodiment, as Figure 6 As shown, to facilitate the pre-setting of the initial preload of the elastic component 5 and thus adapt to the tension requirements under different working scenarios, the guide rod 502 and the connecting rod assembly 4 are connected by a threaded engagement. Specifically, a sensing module 8 is installed at the second end of the guide rod 502. The sensing module 8 and the rod body 401 of the connecting rod assembly 4 are connected by a thread. By rotating the rod body 401, the thread engagement length between the sensing module 8 and the rod body 401 can be adjusted, thereby changing the initial compression of the elastic component 501. With the sensing module 8 monitoring the initial preload, the magnitude of the initial preload can be accurately preset. For example, a plane that mates with a wrench can be set on the outside of the corresponding rod body 401. The adjustment operation can be completed by rotating the rod body 401 with a wrench, which is very convenient.

[0065] Further optimization, such as Figure 3As shown, both the connecting rod assembly 4 and the elastic component 5 can be a pair. The two connecting rod assemblies 4 are symmetrically arranged on the upper and lower sides of the molten material conveying mechanism 2, and the elastic component 5 is preferably arranged on the upper and lower sides of the same molten material conveying mechanism 2. The symmetrical layout allows the tension force on the molten material conveying mechanism 2 to be distributed more evenly, avoiding the skewing of the injection head 202 due to uneven force, ensuring the flatness of the sealing fit, and further improving the sealing performance.

[0066] Based on the above-mentioned dual-sided slurry preparation scheme, it also has the following drawback: after the molten metal injection is completed, the barrel 201 needs to be disassembled for maintenance and cleaning, that is, the molten material conveying mechanism 2 and the template 301 need to be disassembled. At this time, the liquid magnesium alloy remaining in the injection head 202 and the injection barrel 302 will cool and solidify, thus forming magnesium rods. Direct disassembly requires the application of a large external force, which increases the difficulty of disassembly and maintenance.

[0067] Therefore, in order to solve the above-mentioned technical problems, such as Figure 6 and Figure 7 As shown, a telescopic device 9 is installed on the frame 7 or the connecting pipe 503, and the output end of the telescopic device 9 corresponds to the guide rod 502.

[0068] Specifically, the telescopic device 9 can be a thin jack, such as... Figure 11 As shown, the jack is equivalent to being directly fixed to the frame 7 outside the barrel 201, and a thrust F is applied to the guide rod 502 through the jack. 推 Then, through the rigid connecting rod assembly 4, the left barrel 201 is acted upon, causing the left injection head 202 to separate from the injection barrel 302, breaking the magnesium rod; similarly, F 推 The reaction force will act on the jack itself and the right barrel 201, thereby causing the right barrel 201 to move in the opposite direction, so that the right injection head 202 and the injection cylinder 302 will also separate synchronously, making it easier to complete the subsequent disassembly and maintenance work without the need for additional external pulling equipment.

[0069] Further optimization involves performing the magnesium rod breaking operation when the temperature inside the barrel 201 drops to approximately 300°C. The principle behind this is that the mechanical properties of magnesium alloys decrease as the temperature increases, and the decrease in mechanical properties is more pronounced at 300°C, resulting in a smaller force required for the breaking operation. Furthermore, the magnesium alloy will not easily react with other substances due to excessively high temperatures. This temperature is within a safe range, balancing operational safety with the convenience of breaking the rod.

[0070] It should be known that, as Figure 12 and Figure 13As shown, the injection barrel 302 cooperates with the injection rod in the injection assembly 303. The injection rod reciprocates within the injection barrel 302 to push the molten magnesium alloy. Due to structural limitations, the end of the injection rod that mates with the injection barrel 302 cannot achieve a completely sealed fit. Therefore, when the injection rod retracts, a small amount of molten magnesium alloy easily adheres to its surface. When this portion of the molten alloy is exposed to air, it will react with oxygen in the air and undergo an oxidation reaction, posing a safety hazard.

[0071] Therefore, in order to solve the above-mentioned technical problems, such as Figure 13 As shown, a housing 10 is fitted at the joint between the injection rod and the injection cylinder 302. The housing 10 can be filled with inert gas, forming an oxygen-isolated gas protective layer in the area where the injection rod and the injection cylinder 302 are connected. This ensures that the trace amount of molten magnesium alloy carried out during the retraction of the injection rod is always surrounded by inert gas, and will hardly come into contact with oxygen in the air to undergo an oxidation reaction, thus reducing or even eliminating the safety hazards caused by oxidation and combustion.

[0072] As a further description of the above embodiments: as Figure 14 As shown, the housing 10 includes a pair of half-shells 1001. After the two half-shells 1001 are assembled together, they can be fitted as a whole into the joint between the injection cylinder 302 and the injection rod. Installation can be completed without making significant changes to the structure of the original injection assembly, making it more adaptable and easier to disassemble and maintain.

[0073] Further optimization, such as Figure 15 As shown, the two half-shells 1001 can be detachably connected via a locking structure 14, facilitating quick opening of the shell 10 for internal inspection and cleaning, and allowing for quick reassembly after maintenance of the injection module. It should be noted that the locking structure 14 can be a toggle-type latch, a spring latch, or other commonly used quick-locking structures in the art. The specific structural form is not limited here; those skilled in the art can choose according to the actual situation.

[0074] There are several ways in which the two half-shells 1001 are connected by the locking structure 14, including but not limited to the following two: Method 1: For example Figure 14 As shown, the two half-shells 1001 are connected and fixed on both sides by a locking structure 14. During disassembly and assembly, the two locking structures on both sides can be unlocked at the same time to quickly separate the two half-shells 1001.

[0075] Method 2 (not shown): The two half-shells 1001 are hinged together on one side by a pivot, and locked together on the other side by a locking structure 14. During disassembly and assembly, only one side of the locking mechanism needs to be unlocked to flip and open the half-shell 1001, preventing it from falling off completely and making operation more convenient. Furthermore, the two half-shells 1001 remain connected after disassembly, preventing loss, and allowing for quick repositioning during reassembly, resulting in higher installation efficiency.

[0076] Both methods can meet practical needs, and those skilled in the art can choose the appropriate connection method based on actual installation conditions and maintenance requirements. Of course, the two half-shells 1001 can also be connected using the most traditional method, such as a detachable connection using bolts and nuts. This connection method has lower processing costs, better structural stability, and can also meet the usage requirements of ordinary production scenarios.

[0077] As a further optimization, such as Figure 16 As shown, a mounting bracket 15 is fixedly installed at the tail end of the injection cylinder 302. The mounting bracket 15 provides positioning support for the snap-fit ​​installation of the housing 10. Specifically, the mounting bracket 15 includes a first ring body 1501, a second ring body 1502, and connecting members 1503. The first ring body 1501 is coaxially fixedly installed at the tail end of the injection cylinder 302. The second ring body 1502 is fixed at intervals to the first ring body 1501 away from the injection cylinder 302 by at least three connecting members 1503 evenly distributed along the circumference. Circumferentially extending annular grooves are formed on the outer circumferential surfaces of both the first ring body 1501 and the second ring body 1502. The two half-shells 1001 fit together and snap into these annular grooves, achieving the installation and positioning of the housing 10.

[0078] In one embodiment of this application, such as Figure 14 As shown, an air inlet 13 is provided on the outer circular wall of the housing 10, through which inert gas can be injected into the housing 10; at the same time, the inner diameter of the second ring 1502 is larger than the diameter of the injection rod, so an outflow gap is reserved between the inner wall of the second ring 1502 and the rod body of the injection rod, and the inert gas entering the housing 10 will slowly flow out through this gap, such as... Figure 16 As indicated by the arrows, this ensures that the interior of the casing 10 is always under positive pressure, preventing air from seeping into the casing 10 and guaranteeing the isolation effect of the inert gas protective layer against oxygen. The inert gas, for example, can be argon, which is stable, does not readily react with magnesium alloys, and is relatively inexpensive, making it suitable for large-scale use in industrial production.

[0079] It should be noted that due to the high-temperature working environment and manufacturing cost limitations, conventional sealing materials cannot meet the sealing requirements of this device. Therefore, the device as a whole does not adopt a completely sealed structure. For example, the inert gas can slowly flow out at the splicing position of the housing 10 and the installation position of the first ring 1501. Especially between the second ring 1502 and the injection rod, and since the reciprocating speed of the injection rod is relatively fast, direct contact with the seal could easily damage the moving parts. Therefore, a pre-set assembly gap is provided between the two, through which most of the inert gas flows out. In addition, different sizes of the second ring 1502 can be used to adapt to different models of injection rods.

[0080] In this embodiment, as Figure 14 As shown, the two half-shells 1001 are assembled vertically, one above the other. An observation window 11 is provided on the outer wall of the upper half-shell 1001. This observation window 11 is sealed with a high-temperature resistant transparent plate, allowing direct observation of the internal working condition of the shell 10 without disassembling it. This facilitates timely detection of surface abnormalities at internal joints and excessive slag accumulation inside the shell 10 by operators, making maintenance more convenient. The lower half-shell 1001 has a slag discharge port 12 at its bottom. After cooling, the magnesium alloy molten metal forms metal slag, which can collect towards the bottom of the shell 10 under gravity and finally be discharged from the shell 10 through the slag discharge port 12. This eliminates the need to disassemble the entire shell 10, further improving the efficiency of maintenance and cleaning.

[0081] It should be understood that in the prior art, the injection cylinder 302 is a split assembly structure, which includes an injection cylinder and an extrusion cylinder. That is, the injection nozzle is installed on the injection cylinder through the extrusion cylinder. In this way, the assembly process of the two cylinders requires an additional sealing connection structure to ensure the fitting accuracy. This has structural defects of having a large number of parts and many installation mating surfaces, which leads to an increased risk of material leakage and a complex installation process. In addition, the assembly accuracy of the split structure is highly dependent on the operator's skill level. The accuracy of repeated assembly is poor, and it is difficult to ensure the consistency of positional accuracy after disassembly and assembly. The coaxiality of the injection cylinder 302 needs to be recalibrated every time it is disassembled and assembled, which significantly increases the maintenance cost and extends the maintenance time.

[0082] Therefore, in order to solve the above-mentioned technical problems, such as Figure 17 As shown, the injection cylinder 302 adopts an integrated molding structure. Specifically, a through mounting groove 17 is provided in the template 301 along the first direction, and the cover plate 16 is installed on one side of the template 301 to form an installation position between the cover plate 301 and the interior of the template 301. The fixing flange 304 is installed at the first end of the injection cylinder 302. It should be added that, as Figure 12 and Figure 17As shown, one side of the template 301 refers to the front side, that is, the side used to install the mold; while the other side of the template 301 is the back side. The first end of the injection barrel 302 refers to the injection end, that is, the end used to install the injection nozzle, and the injection barrel 302 is also installed on the template 301 through the first end; the second end of the injection barrel 302 is the feed end, which is used to insert and seal with the injection assembly 303.

[0083] Understandably, when installing the injection cylinder 302, the fixing flange 304 is first fixedly installed on the first end of the injection cylinder 302. Then, the second end of the injection cylinder 302 is inserted into the mounting groove 17 from the front side of the template 301 towards the back side until the fixing flange 304 is inserted into the installation position. At this time, the fixing flange 304 will form an axial stop with the end face of the installation position. Finally, the cover plate 16 is installed and fixed on the front side of the template 301 to complete the overall assembly and fixing of the injection cylinder 302, thus completing the axial locking fit between the injection cylinder 302 and the template 301.

[0084] It should be noted that, for the traditional split-type injection cylinder 302 structure, its installation method is generally to directly fix the injection cylinder 302 to the back side of the template 301 using flanges and multiple bolts. However, in actual use, the back side of the template 301 is fixedly installed on the die-casting machine head plate 101. Therefore, the installation position of the injection cylinder 302 is located between the template 301 and the die-casting machine head plate 101. When disassembling the injection cylinder 302, the entire template 301 must be disassembled, which is very inconvenient for maintenance. In this design, the injection cylinder 302 can be installed directly from the front side of the template 301. During disassembly and maintenance, only the cover plate 16 needs to be removed to pull the injection cylinder 302 out directly from the front side, improving maintenance efficiency. Furthermore, this design uses an integrated molding structure for the injection cylinder 302, reducing processing and assembly difficulty and preventing issues such as wear, material leakage, and positioning misalignment at the connection points under long-term high-temperature operation. It also improves heating and insulation performance, effectively extending the service life of the injection cylinder 302 and enhancing the processing accuracy of the magnesium alloy semi-solid molding. Additionally, it should be noted that in traditional designs, the mounting flange of the injection cylinder 302 is located on the outside of the template 301, acting like a large "heat sink" connected to the template 301. This reduces the insulation performance of the injection cylinder 302 and increases energy consumption. In contrast, the fixing flange 304 in this design is located inside the template 301, reducing heat loss from the injection cylinder 302.

[0085] As a further description of the above embodiments: such as Figure 17As shown, the mounting groove 17 is a stepped groove, comprising a first groove 1701 and a second groove 1702 coaxially connected. The first groove 1701 is located on the side near the back of the template 301, and the second groove 1702 is located on the side near the front of the template 301. The diameter of the second groove 1702 is larger than the diameter of the first groove 1701. The cover plate 16 is detachably fixed to the front of the template 301 by bolts. The inner surface of the cover plate 16 abuts against the end face of the fixing flange 304, thereby pressing and locking the fixing flange 304 in the installation position. The structure is simple and the assembly connection is stable.

[0086] Further optimization, such as Figures 17 to 19 As shown, the outer diameter of the fixed flange 304 is matched with the inner diameter of the second groove 1702, ensuring that the fixed flange 304 can be stably embedded in the second groove 1702. At the same time, the axial length of the fixed flange 304 is less than the axial depth of the second groove 1702, so that the fixed flange 304 will not protrude from the front side of the template 301 after installation. The cover plate 16 after installation is flush with the front side of the template 301, ensuring that the front side of the template 301 fits the mold mounting surface and does not affect the installation accuracy of the mold.

[0087] Further preferably, the fixed flange 304 can be detachably bolted to the first end of the injection cylinder 302, facilitating the subsequent removal of the injection cylinder 302 and the disassembly and separation of the fixed flange 304 from the injection cylinder 302. This allows for individual replacement of worn parts, reducing maintenance costs. Additionally, to prevent the injection cylinder 302 from rotating circumferentially due to injection force during operation, the fixed flange 304 and the second groove 1702 are engaged by a limiting structure 18. This limiting structure 18 locks the fixed flange 304 circumferentially, ensuring the overall installation and positioning accuracy of the injection cylinder 302.

[0088] Specifically, such as Figure 18 and Figure 19 As shown, the limiting structure 18 includes a limiting block 1801 and a limiting groove 1802. The limiting block 1801 is fixedly installed on the outer periphery of the fixed flange 304, and the limiting groove 1802 is correspondingly opened on the inner periphery of the second groove 1702. The limiting groove 1802 extends axially to the end face of the template 301 near the positive side. During assembly, the limiting block 1801 is first aligned with the limiting groove 1802 and inserted, and the fixed flange 304 can be smoothly pushed into the second groove 1702 to achieve circumferential locking.

[0089] In a further preferred embodiment, the limiting structure 18 is provided with four and evenly spaced along the circumferential direction, and the limiting block 1801 is detachably installed on the fixed flange 304 by bolts. The four evenly distributed limiting structures 18 can ensure uniform limiting force, and the limiting block 1801 can be replaced individually when it is worn, thus improving convenience.

[0090] Specifically, in addition to circumferential positioning, the four limiting blocks 1801 also bear the weight of the injection cylinder 302 and the injection assembly 303. Since the injection cylinder 302 and the fixed flange 304 are heated as a whole during operation, they will undergo thermal expansion and deformation. Traditional positioning methods cannot accommodate the positioning offset caused by thermal expansion; forcibly constraining thermal deformation will generate significant internal stress, leading to structural component failure and damage. Therefore, this design, based on the support of the four limiting blocks 1801, allows for sufficient clearance between the mounting groove 17 and the fixed flange 304. This clearance, without affecting positioning accuracy, accommodates the volume expansion and deformation of the injection cylinder 302 and the fixed flange 304 after heating, thus improving structural stability.

[0091] In one embodiment of this application, such as Figure 18 As shown, a material injection port 3021 is provided on the outer side of the first end of the injection barrel 302. This material injection port 3021 is used in conjunction with the injection head 202 on the barrel 201. However, the size of the fixed flange 304 is larger than that of the injection barrel 302. The fixed flange 304 will obstruct the operator's observation of the position of the material injection port 3021. Therefore, this solution provides an observation port 3041 at the fixed flange 304. The operator can directly observe the position of the material injection port 3021 through the observation port 3041, which facilitates the alignment and adjustment of the injection head 202 and the material injection port 3021.

[0092] It should be understood that in the prior art, the feeding component 203 in the molten material conveying mechanism 2 is used to convey magnesium alloy particles into the barrel 201. However, the magnesium alloy particles are at a low temperature before entering the barrel screw, and the barrel screw needs to complete the heating and melting and stirring homogenization processes at the same time during the conveying process, which makes the heating time of the barrel screw longer and reduces the overall processing efficiency. In addition, the direct entry of low-temperature magnesium alloy particles into the high-temperature barrel 201 will cause rapid local temperature fluctuations and increase the energy consumption of the heating module.

[0093] Therefore, in order to solve the above-mentioned technical problems, such as Figure 20 As shown, a vertical discharge pipe 205 is installed between the feeding assembly 203 and the barrel 201. The top end of the discharge pipe 205 is the feeding end, and the bottom end is the discharge end. A preheating assembly 204 is provided outside the discharge pipe 205 and extends along the axial direction of the discharge pipe 205. The discharge pipe 205 has a preheating section 2051, and the preheating assembly 204 at least completely covers this preheating section 2051, or it can cover the entire discharge pipe 205.

[0094] Understandably, after the metal material enters from the top of the discharge pipe 205, it passes downwards through the preheating pipe section 2051 under its own gravity. Due to the material feeding cycle, it will remain in the preheating pipe section 2051 for a period of time. During this process, it will be continuously and uniformly heated by the preheating components 204 on the outer periphery of the preheating pipe section 2051. Finally, it will be heated to the preset semi-solid processing temperature before entering the barrel 201 to complete the subsequent thixotropic forming process. This preheating method can effectively shorten the heating time in the barrel and screw, improve the overall processing efficiency, and at the same time avoid the local temperature drop caused by the low-temperature material entering the barrel 201, reduce the additional energy consumption of the heating module, and reduce processing costs.

[0095] It should be noted that the preheating component 204 is a well-known technology to those skilled in the art, such as heating coils / heaters and thermocouples. It is detachably installed on the outside of the discharge pipe 205, for example, using conventional clamping or snap-fit ​​structures; therefore, its specific structure will not be described in detail here. Of course, similar heating and insulation components are also provided on the outside of the barrel 201 and the injection barrel 302 to maintain the temperature stability of the magnesium alloy slurry; this structure is also a conventional design in the art. The feeding component 203 is also a well-known technology to those skilled in the art.

[0096] In one embodiment of this application, such as Figure 21 As shown, a flow divider 20 is installed at the axis of the discharge pipe 205, and the flow divider 20 extends at least through the entire preheating pipe section 2051; Figure 22 As shown, an annular channel 23 for magnesium alloy particles to pass through is formed between the outer side of the diverter 20 and the inner side of the preheating tube section 2051. This allows the falling magnesium alloy particles to get closer to the tube wall of the preheating tube section 2051, and the heat of the tube wall comes from the preheating component 204 on the outside. This allows the magnesium alloy particles to absorb heat faster and more evenly, avoiding uneven preheating problems such as insufficient center temperature and excessive surface temperature, and improving the preheating effect.

[0097] Magnesium alloy particles generally have a flaky, fragmented structure. Let the equivalent particle size of the magnesium alloy particles be 'd', which is the diameter of the maximum circumscribed circle of the particles. The radial width of the annular channel 23 is 'D', and D is set to 7 to 12 times 'd'. It should be noted that before the magnesium alloy slurry in the barrel 201 is conveyed, the magnesium alloy particles will remain in the feeding assembly 203 and the discharge pipe 205 for at least one production cycle, allowing for sufficient preheating. Understandably, if D is less than 7d, the channel width is relatively narrow, easily causing blockage of the magnesium alloy particles; if D is greater than 12d, the channel width is too large, and magnesium alloy particles near the center of the diverter 20 are too far from the heating tube wall, resulting in uneven preheating. Therefore, setting D to 7 to 12 times the equivalent particle size ensures smooth material flow and guarantees good heating for all magnesium alloy particles, further improving preheating uniformity.

[0098] Further optimization, such as Figure 21 and Figure 22 As shown, the diverting rod 20 can be fixedly installed inside the discharge pipe 205 by multiple support plates 22, which extend along the axial direction of the diverting rod 20. Specifically, four support plates 22 can be used and evenly distributed around the circumference of the diverting rod 20, thereby dividing the annular channel 23 into four independent sub-channels. This arrangement can prevent magnesium alloy particles from circumferentially moving and agglomerating within the annular channel 23, ensuring that the material is always dispersed in each sub-channel and falls independently, further guaranteeing the uniformity of overall preheating. At the same time, during the falling process, the magnesium alloy particles will come into contact with the outer side of the support plate 22, the outer side of the diverting rod 20, and the inner side of the preheating pipe section 2051, thus slightly agitating the magnesium alloy particles and further improving the uniformity of overall heating.

[0099] Further optimization, such as Figure 21 As shown, a conical part 21 is provided at the top of the diverting rod 20, and the cone apex of the cone 21 faces the feed end of the discharge pipe 205, that is, the feed end position located at the top. After the magnesium alloy particles entering the discharge pipe 205 from the top land on the conical surface of the cone 21, they will be diverted to the periphery along the cone surface and evenly enter the sub-channels formed by the various support plates 22 below, further ensuring the uniformity of material dispersion in the annular channel 23 and optimizing the preheating effect. At the same time, the conical structure will not obstruct the material discharge, ensuring a smooth and jam-free discharge process.

[0100] Further optimization, such as Figure 21 and Figure 22As shown, the interior of the diverting rod 20 is designed as a hollow structure, which reduces overall manufacturing costs and weight while meeting structural strength requirements. Furthermore, the tapered portion 21 is detachably mounted on the top of the diverting rod 20, for example, by threaded connection. This allows for the replacement of tapered portions 21 with different taper sizes according to the average particle size of the magnesium alloy particles, adjusting the diversion effect and enhancing the flexibility of the device.

[0101] In this embodiment, as Figure 20 As shown, the top of the discharge pipe 205 can be detachably connected to the feeding assembly 203 via a flange structure, facilitating disassembly and maintenance. A horizontal groove, perpendicular to the connection point between the discharge pipe 205 and the feeding assembly 203, is provided at the joint. A sealing plate 19 is slidably inserted into the groove, and a handle extends from the outer end of the sealing plate 19. The operator can slide the sealing plate 19 within the groove by pushing or pulling the handle, thereby flexibly adjusting the opening size of the connection by blocking different areas of the connection. In other words, by controlling the opening size of the connection, the feeding rate of magnesium alloy particles entering the preheating pipe section 2051 per unit time can be adjusted.

[0102] Another aspect of this application provides a die-casting machine, including the aforementioned large magnesium alloy thixotropic molding module employing dual-sided slurry preparation.

[0103] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. A large magnesium alloy thixotropic forming module with double-sided pulping, characterized in that, include: A template is fixedly installed on the inner side of the die-casting machine head plate, and a die-casting mold is adapted to be installed on the template. An injection mechanism is provided, which passes through the die-casting machine head plate along a first direction and is fixedly installed on the template, and the injection mechanism is connected to the die-casting machine injection unit. A pair of molten material conveying mechanisms are symmetrically slidably mounted on both sides of the template along a second direction, and the injection heads of the molten material conveying mechanisms cooperate with the injection mechanism; wherein the first direction and the second direction are perpendicular; and A tensioning mechanism includes a connecting rod assembly and an elastic component. The two ends of the connecting rod assembly are respectively connected to the outer sides of the two molten material conveying mechanisms. The elastic component is disposed at least at one end of the connecting rod assembly and connected to the molten material conveying mechanism. The elastic component is adapted to provide a pre-tightening force to the two molten material conveying mechanisms synchronously and close to each other through the connecting rod assembly, so that the injection head is tensioned and sealed to the injection mechanism.

2. The large magnesium alloy thixotropic forming module with double-sided pulping as described in claim 1, characterized in that: The external frame of the molten material conveying mechanism is fixedly connected; the elastic component includes an elastic element, a guide rod, and a connecting pipe. The connecting pipe is fixedly connected to the frame, the guide rod is inserted and installed at the axis of the connecting pipe, the elastic element is located inside the connecting pipe and its two ends are respectively abutted and fitted to the frame and the first end of the guide rod, the second end of the guide rod is connected to the connecting rod assembly, and the elastic element is in a compressed energy storage state.

3. The large magnesium alloy thixotropic forming module with double-sided pulping as described in claim 2, characterized in that: One end of the connecting rod assembly is connected to the molten material conveying mechanism through the elastic component. The elastic component includes multiple disc springs coaxially stacked and sleeved on the guide rod. At least one disc spring assembly is sleeved on the outside of the guide rod. The disc spring assembly includes four disc springs arranged in sequence: a first disc spring, a second disc spring, a third disc spring, and a fourth disc spring. The conical surfaces of the first disc spring and the second disc spring face the same direction to form a first disc spring group. The conical surfaces of the third disc spring and the fourth disc spring face the same direction to form a second disc spring group. The conical surfaces of the first disc spring group and the second disc spring group face opposite directions.

4. The large magnesium alloy thixotropic forming module with double-sided pulping as described in claim 3, characterized in that: The second end of the guide rod is connected to the connecting rod assembly via a threaded connection; the initial preload is preset by adjusting the thread engagement length.

5. The large magnesium alloy thixotropic forming module with double-sided pulping as described in claim 4, characterized in that: A telescopic device is installed on the frame or the connecting pipe, and the output end of the telescopic device corresponds to the guide rod; the telescopic device is adapted to extend through the output end and abut against the guide rod, thereby driving the molten material conveying mechanism to move in a direction away from the template.

6. The large magnesium alloy thixotropic forming module with double-sided pulping as described in claim 1, characterized in that: The template is provided with an installation groove along the first direction. The installation groove includes a first groove and a second groove that are coaxially connected. The diameter of the second groove is larger than the diameter of the first groove. A fixing flange is installed at the first end of the injection cylinder of the injection mechanism. During installation, the injection cylinder passes through the second end into the mounting groove until the fixing flange mates with the second groove body. A cover plate flush with the template is installed in the second groove body so that the injection cylinder forms a stop and lock engagement with the template in the first direction.

7. The large magnesium alloy thixotropic forming module with double-sided pulping as described in claim 6, characterized in that: A pressure rod is movably provided at the second end of the injection cylinder. A housing is fitted at the joint between the injection cylinder and the pressure rod. The housing is suitable for being filled with inert gas, thereby forming a gas protective layer that isolates oxygen.

8. The large magnesium alloy thixotropic forming module with double-sided pulping as described in claim 1, characterized in that: The discharge pipe is vertically installed on the barrel of the molten material conveying mechanism and is connected to it. A feeding assembly is connected to the top of the discharge pipe. A preheating assembly is sleeved on the outside of the discharge pipe. The discharge pipe has a preheating section, and the preheating assembly covers at least the entire length of the preheating section. Thus, the metal material in the feeding assembly is heated to a preset temperature by the preheating assembly as it passes through the preheating section under the action of gravity.

9. The large magnesium alloy thixotropic forming module with double-sided pulping as described in claim 8, characterized in that: A flow divider is installed at the center of the discharge pipe. The flow divider extends at least through the preheating pipe section, thereby forming an annular channel for metal materials to pass through between the outer side of the flow divider and the inner side of the preheating pipe section.

10. A die-casting machine, characterized in that, Including the large magnesium alloy thixotropic molding module with double-sided pulping as described in any one of claims 1-9.

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