Dual Unit Die Casting Machine

Abstract

The present application discloses a magnesium alloy unit including a work table, a melting cylinder attached to the work table, a transport mechanism, and an injection unit, wherein the transport mechanism cooperates with the melting cylinder, and the injection unit cooperates with the transport mechanism, and when die-casting a magnesium alloy, the magnesium alloy unit is configured to perform a first step in which the transport mechanism transports magnesium particles to fill the melting cylinder, which then smelts the magnesium particles to form molten metallic magnesium, and a second step in which the injection unit cooperates with the transport mechanism to inject the molten metallic magnesium from the injection head of the melting cylinder into the die-casting machine body. A dual-unit die-casting machine is also disclosed.

Description

[Technical Field]

[0001] The present application relates to the technical field of die casting machines, and in particular to units for magnesium alloys and dual unit die casting machines. [Background technology]

[0002] A die-casting machine is a machine used for die-casting (pressure casting). There are two types: hot chamber and cold chamber. The latter is further divided into vertical and horizontal. A die-casting machine uses pressure to inject molten metal into a die, where it cools and forms, and when the die is opened, a solid metal casting is obtained. It was originally used for die-casting type.

[0003] Die casting for various products involves different materials. For example, both aluminum alloy and magnesium alloy die castings use cold chamber die casting. The shot sleeve of the cold chamber die casting machine is separated from the holding furnace. During die casting, the molten metal is extracted from the holding furnace and poured into the shot sleeve before die casting. In particular, for magnesium alloy die casting, the molten metal is in a solid-liquid mixed state during die casting, making it inconvenient to inject it from the holding furnace into the die casting machine. On the other hand, SF6 protective gas must be used during the smelting and die casting of magnesium alloys to prevent oxidation of the magnesium metal and alloys by air, further increasing production costs. Therefore, we propose a magnesium alloy unit and a dual-unit die casting machine to address the above technical challenges. Summary of the Invention [Problem to be solved by the invention]

[0004] One object of the present application is to provide a unit for magnesium alloys.

[0005] Another object of the present invention is to provide a dual unit die casting machine. [Means for solving the problem]

[0006] To achieve the above object, the present application employs the following technical solution: a magnesium alloy unit including a work table, a melting cylinder attached to the work table, a transport mechanism, and an injection unit, the transport mechanism cooperating with the melting cylinder, the injection unit cooperating with the transport mechanism, and the magnesium alloy unit is configured to perform, during magnesium alloy die casting, a first step in which the transport mechanism transports magnesium particles to fill the melting cylinder, which is then smelted by the melting cylinder to form molten metallic magnesium, and a second step in which the injection unit cooperates with the transport mechanism to inject the molten metallic magnesium from the injection head of the melting cylinder into the die-casting machine body.

[0007] Preferably, the transport mechanism includes a mounting block mounted on the work table so as to be horizontally slidable, a screw located in the melting cylinder, and a drive device mounted on the mounting block; a first end of the screw rotatably mounted on the mounting block and connected to an output shaft of the drive device by a spline; the mounting block is connected to the injection unit; When performing the first step, the driving device rotates the screw, transports the metal particles entering through the inlet of the melting cylinder, and fills the inside of the melting cylinder; further, the screw moves in a direction away from the melting cylinder due to a reaction force of the metal particles, and the injection unit drives the mounting block to move away from the melting cylinder; When performing the second step, the injection unit drives the mounting block to approach the melting cylinder, and further extrudes the molten metallic magnesium from the melting cylinder by the screw head at the second end of the screw.

[0008] Preferably, the injection unit includes an injection seat and an injection moving hydraulic cylinder; the injection seat is attached to the work table in correspondence with the mounting block; The melting cylinder is fixed to the injection seat; a first connecting seat hingedly connected to the cylinder body of the injection moving hydraulic cylinder; A second connecting seat is hingedly connected to the piston end of the injection moving hydraulic cylinder; The first connecting seat is attached to the injection seat, The second connection seat is attached to the mounting block.

[0009] Preferably, the screw head comprises a rod head, a blocking portion, a non-return ring, a collar, and a gasket; the rod head is attached to the second end of the screw by a thread; The blocking portion and the gasket are provided outside the rod head with a gap between them, A plurality of material grooves are provided outside the blocking portion, the collar is connected to the outside of the check ring and abuts against the inner wall of the melting cylinder; the check ring is connected to the rod head in correspondence with the interval, and has an axial length shorter than the interval, and a flow path communicating with the material groove is formed between the check ring and the interval; when transporting the molten metallic magnesium, the check ring abuts against the blocking portion, a gap is formed between the check ring and the gasket, and the molten metallic magnesium is injected into the injection head through the gap, the flow path, and the material groove; When the molten metallic magnesium flows backward, the non-return ring comes into contact with the gasket due to the force of the flow, thereby reducing or closing the gap and buffering or blocking the force of the backward flow.

[0010] The dual-unit die-casting machine includes a die-casting machine body, an injection module, and the magnesium alloy unit; the injection module is attached to a side of the die-casting machine body so as to be aligned in a straight line with the die-casting machine body, and the melting cylinder is provided perpendicular to the die-casting machine body so as to be connected to the injection module; When performing the first mode die casting, the injection module injects the added molten aluminum metal into the die casting machine body to form it; When performing the second mode die casting, the melting cylinder first injects molten metallic magnesium into the injection module, and then the injection module injects the molten metallic magnesium into the die casting machine body for molding.

[0011] Preferably, a pressing mechanism is attached to the die casting machine body, the pressing mechanism cooperating with the injection module and arranged in a straight line corresponding to the melting cylinder; The pressing mechanism abuts the injection module against the melting cylinder so that the injection module and the melting cylinder are maintained in a sealed state.

[0012] Preferably, the injection module includes a material injection cylinder, a material extrusion cylinder, and an injection nozzle; The material injection cylinder is attached to a fixed die plate of the die casting machine body, and the material extrusion cylinder and the injection nozzle are sequentially connected to an end of the material injection cylinder; The injection nozzle communicates with the mold cavity of the die-casting machine body, and the material extrusion cylinder communicates with the melting cylinder.

[0013] Preferably, the internal diameter of the injection head is smaller than the internal diameter of the material extrusion cylinder; The inner diameter of the injection nozzle is smaller than the diameter of the gate opening in the mold cavity.

[0014] Preferably, the pressing mechanism includes a pressing hydraulic cylinder and an extrusion head, The pressing hydraulic cylinder is attached to the fixed die plate, and the extrusion head is attached to one end of a piston rod of the pressing hydraulic cylinder, The pressing hydraulic cylinder brings the extrusion head into contact with the material extrusion cylinder, and further brings the material extrusion cylinder and the injection head into contact with each other to form a sealed seal.

[0015] Preferably, limit rods are provided symmetrically in the vertical direction within the fixed die plate, The magnesium alloy unit is fitted to the first end of the limit rod, so that the position of the magnesium alloy unit is limited and locked; The pressing mechanism is locked and attached via the second end of the limit rod.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] (1) According to the present invention, the melting cylinder allows for the smelting of molten magnesium metal. Furthermore, by directly connecting the melting cylinder to the die-casting machine body, the transport of molten magnesium metal is facilitated and heat loss is reduced, thereby improving the efficiency of the entire die-casting process and reducing costs. Furthermore, the hermeticity of the melting cylinder eliminates the need for SF6 protective gas during die-casting, thereby reducing costs, improving safety, and achieving the goal of environmental protection.

[0018] (2) According to the present invention, by installing a magnesium melting module in a conventional cold chamber die casting machine, two modes of injection, magnesium alloy and aluminum alloy, can be realized. This allows two different types of molten metal to be used in one die casting machine. This eliminates the need for two die casting machines, significantly reducing equipment costs and space requirements.

[0019] (3) Compared with traditional cold chamber die casting, the magnesium alloy injection module can significantly reduce the operating temperature, reduce the magnesium content of the product casting, and the high power of the system, thereby significantly reducing energy consumption. [Brief explanation of the drawings]

[0020] [Figure 1] 1 is a schematic diagram of the overall structure of the present application. [Figure 2] FIG. 1 is a partial structural schematic diagram of the present application. [Figure 3] FIG. 3 is a schematic cross-sectional view of FIG. 2 of the present application. [Figure 4] FIG. 1 is an enlarged schematic diagram of the structure at A of the present application. [Figure 5] 1 is a schematic diagram of the mounting structure of a melting module, an injection module, and a pressing mechanism according to the present invention; [Figure 6] 1 is a schematic diagram of the overall structure of a melting module of the present application. [Figure 7] 1 is a schematic diagram showing a specific structure of a melting module according to the present invention; [Figure 8] 1 is a schematic diagram illustrating the principle of injection and transportation of magnesium particles according to the present invention. [Figure 9] FIG. 1 is a schematic diagram illustrating the principle of melting and then injecting magnesium particles according to the present invention. [Figure 10] FIG. 2 is a structural schematic diagram of the screw of the present invention. [Figure 11] 1 is a schematic diagram illustrating the principle of the flow of the magnesium material of the present invention when passing through the screw head and when flowing backward. [Figure 12]1 is a schematic diagram showing a specific structure of a screw head according to the present invention. [Figure 13] 1 illustrates a die carrier assembly of the present application. DETAILED DESCRIPTION OF THE INVENTION

[0021] The present application will be further described below in relation to specific embodiments, and it should be noted that, unless inconsistent, the embodiments or technical features described below may be arbitrarily combined to form new embodiments.

[0022] In the description of this application, the orientations or positional relationships indicated by directional terms, such as the terms "center," "lateral," "longitudinal," "length," "width," "thickness," "up," "down," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," "outside," "clockwise," and "counterclockwise," are orientations or positional relationships indicated based on the drawings, and are intended solely for the convenience and simplification of the description of this application. They do not state or imply that the devices or elements indicated therein must necessarily have a specific orientation or be configured or operated in a specific orientation, and should not be understood as limiting the specific scope of protection of this application.

[0023] In addition, the terms "first," "second," etc. in the specification and claims of this application are used to distinguish between similar objects and are not necessarily used to describe a specific order or chronology.

[0024] In one preferred embodiment of the present application, as shown in Figures 1 to 13, the magnesium alloy unit includes a workbench and a melting module 4 attached to the workbench, the melting module 4 includes a melting cylinder 401, a transport mechanism 402, and an injection unit 403, the melting cylinder 401 is attached to the workbench, the transport mechanism 402 is attached to the workbench and cooperates with the melting cylinder 401, and the injection unit 403 is attached to the workbench and cooperates with the transport mechanism 402.

[0025] When die-casting magnesium alloys, the melting module performs two steps. In the first step, as shown in FIG. 8, solid magnesium metal particles are introduced into the melting cylinder 401 through the inlet 8. The transport mechanism 402 then distributes the magnesium particles throughout the melting cylinder 401 (the magnesium metal particles push out the air in the melting cylinder 401, preventing oxidation of the magnesium alloy). The heating assembly on the melting cylinder 401 then melts the metal particles to obtain molten magnesium metal, i.e., semi-solid molten metal (solid particles surrounded by liquid). In the second step, the injection unit 403 cooperates with the transport mechanism 402 to inject the molten magnesium metal from the melting cylinder 401 (i.e., injection head 6 at the left end of the melting cylinder 401) into the die-casting machine body 1, where the subsequent die-casting process is carried out.

[0026] As can be seen, melting cylinder 401 enables the smelting of molten magnesium metal. Furthermore, by directly connecting melting cylinder 401 to die-casting machine body 1, the transport of molten magnesium metal is facilitated and heat loss is reduced, thereby improving the efficiency of the entire die-casting process and reducing costs. Furthermore, the hermeticity of melting cylinder 401 eliminates the need for SF6 protective gas during die-casting, reducing costs while improving safety and achieving the goal of environmental protection. Meanwhile, compared with conventional holding furnaces, melting cylinder 401 is small and compact, allowing for a significant reduction in operating temperature, reducing the magnesium content of the product cast and the high power consumption of the system, resulting in a significant reduction in energy consumption.

[0027] To further explain the above embodiment, the transport mechanism 402 includes a mounting block 4021, a screw 4022, and a drive unit 4023 (e.g., a motor). The screw 4022 has a structure similar to that of a screw feeder, and the screw 4022 rotates to transport material. The mounting block 4021 is mounted on a work table so as to be horizontally slidable (as shown in FIG. 2 , the entire melting module 4 is mounted on the work table). The drive unit 4023 is mounted on the mounting block 4021. The screw 4022 is located within the melting cylinder 401. A first end (right end) of the screw 4022 is rotatably mounted on the mounting block 4021 and connected to the output shaft of the drive unit 4023 by a spline. That is, the screw 4022 can not only rotate around its axis but also move axially. The mounting block 4021 is connected to the injection unit 403.

[0028] In the first step, as shown in FIG. 8 , when transporting magnesium particles, the driver 4023 rotates the screw 4022, transporting the magnesium particles that have entered through the inlet 8 of the melting cylinder 401 and distributing them within the melting cylinder 401. This closes the inlet 8, maintaining the sealing of the melting cylinder 401. As is well known, when the screw 4022 exerts a transporting force on the magnesium particles, the magnesium particles also exert a reaction force on the screw 4022, causing the screw 4022 to move away from the melting cylinder 401. At the same time, the injection module 3 also moves the mounting block 4021 away from the melting cylinder 401, so that the driver 4023 also moves away from the screw 4022 so as not to interfere with the movement of the screw 4022. The retreat of the screw 4022 in this step is in preparation for the injection of the magnesium material in the second step.

[0029] On the other hand, when the second process is performed, as shown in FIG. 9, the injection unit 403 returns the mounting block 4021 to its original position so that it approaches the melting cylinder 401. That is, the screw 4022 is moved into the melting cylinder 401 by the driving device 4023. At the same time, the magnesium material is injected into the injection head 6 by the screw head 9 at the second end (left end) of the screw 4022, and then injected from the injection head 6 into the die-casting machine body 1.

[0030] To further explain the above embodiment, as shown in FIG. 9, the injection unit 403 includes an injection seat 4031 and an injection moving hydraulic cylinder 4032. The injection seat 4031 is mounted on the workbench corresponding to the mounting block 4021. The melting cylinder 401 is fixed to the injection seat 4031. A first connecting seat is hingedly connected to the cylinder body of the injection moving hydraulic cylinder 4032. A second connecting seat is hingedly connected to the piston end of the injection moving hydraulic cylinder 4032. The first connecting seat is mounted on the injection seat 4031, and the second connecting seat is mounted on the mounting block 4021.

[0031] The cylinder block and piston rod of the injection moving hydraulic cylinder 4032 are both attached to two connecting seats by hinge connections, and the two connecting seats are fixed to the injection seat 4031 and the mounting block 4021, respectively. This allows the injection moving hydraulic cylinder 4032 to be fixedly attached. With this hinge-connected attachment method, for example, if the mounting block 4021 breaks down, the second connecting seat can be removed, and then the injection moving hydraulic cylinder 4032 can be rotated around the piston rod to move away from the mounting block 4021, thereby eliminating interference by the injection moving hydraulic cylinder 4032 when repairing the mounting block 4021. Furthermore, since it is only necessary to remove the cylinder block of the injection moving hydraulic cylinder 4032, this is easy and convenient, and it can significantly improve the efficiency of installing the injection moving hydraulic cylinder 4032 after repair.

[0032] 10 to 12, the screw head 9 includes a rod head 901, a blocking portion 902, a check ring 904, a collar 905, and a gasket 903. The rod head 901 is attached to the second end (left end) of the screw 4022 by a screw, allowing the rod head 901 to be quickly attached to and detached from the screw 4022. The blocking portion 902 and the gasket 903 are provided on the outside of the rod head 901 with a gap between them. A plurality of material grooves 10 are provided outside the blocking portion 902. The collar 905 is connected to the outside of the check ring 904 and abuts against the inner wall of the melting cylinder 401. The check ring 904 is connected to the rod head 901 at intervals corresponding to the intervals, and its axial length is shorter than the length of the intervals. Flow paths 11 communicating with the material grooves 10 are formed between the inside of the check ring 904 and the intervals.

[0033] The flow direction of the magnesium material in the melting cylinder 401 is shown in Figure 11(C) (i.e., the direction of the arrow). Because the check ring 904 is movably connected to the rod head 901, the flow force of the magnesium material causes the check ring 904 to abut against the blocking portion 902 on the left side, and a gap 12 is formed between the check ring 904 and the gasket 903 on the right side. In this case, the magnesium material is transported by the screw 4022, and flows from the gap 12, flow path 11, and material groove 10 into the material storage chamber on the left side of the melting cylinder 401, as shown in Figure 8.

[0034] Meanwhile, during injection, as shown in FIG. 9 , the screw head 9 moves to the left due to the action of the screw 4022, injecting the magnesium material from the material reservoir chamber into the injection module 3 via the injection head 6. Of course, during injection, the magnesium material backflows due to the reaction force of the magnesium material. In this case, as shown in FIG. 11(d), the check ring 904 receives this reaction force and abuts against the right-side gasket 903, closing the gap 12. This blocks the magnesium material from backflowing, improving the utilization rate of the magnesium material. Of course, as shown in FIG. 12 , multiple notches may be provided on the right side of the check ring 904. In this way, when the check ring 904 abuts against the gasket 903, the presence of the notches prevents the gap 12 from closing and narrows it. This prevents leakage of the magnesium material from the melting cylinder 401 or the material extrusion cylinder 302 due to excessive force. That is, in this case, the gap 12 not only ensures sufficient injection of the magnesium material, but also buffers the backflow force of the magnesium material, thereby ensuring the smooth progress of the entire die casting process. Of course, regarding the specific setting of the gap 12, whether to narrow or close the gap 12 in the event of backflow can be selected by those skilled in the art according to the actual situation.

[0035] As is well known, in the prior art, the molten metal in aluminum alloy die casting is only liquid. As can be seen from the above, in the case of magnesium alloy die casting, the molten metal is in a solid-liquid mixed state, so two separate die casting machines are required for products of two different materials, which increases the equipment cost and installation area.

[0036] In order to solve the above technical problems, another aspect of the present application further provides a dual-unit die-casting machine including a die-casting machine body 1, an injection module 3, and the above-mentioned magnesium alloy unit, wherein the injection module 3 is attached to the side of the die-casting machine body 1 so as to be aligned in a straight line with the die-casting machine body 1, and the melting cylinder 401 is arranged perpendicular to the die-casting machine body 1 so as to be connected to the injection module.

[0037] This die casting machine has two die casting modes (i.e., magnesium-aluminum dual injection mode). When performing die casting in the first mode (i.e., aluminum alloy die casting), the injection module 3 injects the added molten metal of a first type (i.e., molten aluminum metal) into the die casting machine main body 1 to form a shape. On the other hand, when performing die casting in the second mode (i.e., magnesium alloy die casting), the melting module 4 first injects molten metal of a second type (i.e., molten magnesium metal) into the injection module 3, which then injects the molten metal of the second type into the die casting machine main body 1 to form a shape. This allows two different types of molten metal to be used in a single die casting machine, eliminating the need for two die casting machines, thereby reducing equipment costs and saving space.

[0038] Specifically, in this application, there are two modes: aluminum alloy die casting and magnesium alloy die casting. Therefore, in the first mode, due to the well-known high melting point of aluminum alloy, hot chamber die casting is not possible; only cold chamber die casting is possible. That is, aluminum alloy is melted outside the machine, and the first molten metal (i.e., molten aluminum) is added to the injection module 3, which then injects the first molten metal into the die casting machine. On the other hand, when performing the second mode (magnesium alloy die casting), the melting module 4 first adds the second molten metal (i.e., molten magnesium) into the injection module 3, which then injects the second molten metal into the die casting machine. That is, since the two types of molten metal share the same injection module 3 during die casting, two different die casting modes can be flexibly realized.

[0039] 4, the injection module 3 includes a material injection cylinder 301, a material extrusion cylinder 302, and an injection nozzle 303. The material injection cylinder 301 is attached to the fixed die plate 2 of the die casting machine body 1. The material extrusion cylinder 302 and the injection nozzle 303 are connected to the end of the material injection cylinder 301. The injection nozzle 303 is connected to the mold cavity of the die casting machine body 1. The material extrusion cylinder 302 is connected to the melting module 4. The melting module 4 transports the melted second molten metal to the material extrusion cylinder 302 and sends it into the material injection cylinder 301. The second molten metal is then injected into the die casting machine by the injection plunger in the injection module 3. The method by which the injection module 3 injects the molten metal from the material injection cylinder 301 into the die casting machine is common knowledge to those skilled in the art, so detailed explanation will be omitted.

[0040] Furthermore, the internal diameter of injection head 6 is smaller than that of material extrusion cylinder 302, and the internal diameter of injection nozzle 303 is smaller than the diameter of the gate in the mold cavity. Of course, the gate is not shown in this application, but is common knowledge to those skilled in the art. Specifically, the internal diameter of injection head 6 is slightly smaller than that of material extrusion cylinder 302, and the diameter of injection nozzle 303 is slightly smaller than the gate diameter. This structural design prevents the accumulation of cooled material at the gate and prevents the molten magnesium material from spraying out, achieving a good sealing effect and a smooth flow of magnesium material.

[0041] 4 and 5, the entire melting module 4 is installed perpendicular to the die-casting machine body 1, and the melting module 4 is connected and communicated by the injection head 6 abutting against the material extrusion cylinder 302. However, the material extrusion cylinder 302 may shake during long-term extrusion, which may affect the communication and sealing effect between them.

[0042] To solve the above technical problems, in one embodiment of the present application, as shown in Figures 1 and 4, a pressing mechanism 5 is attached to the die casting machine body 1, which cooperates with the injection module 3 and is arranged in a straight line corresponding to the melting module 4. In this case, the pressing mechanism 5 can always bring the injection module 3 and the melting module 4 into contact with each other, so that the injection module 3 and the melting module 4 always maintain a sealed state and ensure stable transportation of the magnesium material during the die casting process.

[0043] 4, the pressing mechanism 5 includes a pressing hydraulic cylinder 501 and an extrusion head 502. The pressing hydraulic cylinder 501 is attached to the fixed die plate 2, and the extrusion head 502 is attached to one end of the piston rod of the pressing hydraulic cylinder. During die casting, the pressing hydraulic cylinder 501 extends to bring the extrusion head 502 into contact with the outside of the material extrusion cylinder 302. That is, during injection, the pressing hydraulic cylinder 501 presses the extrusion head 502 to constantly apply pressure to the material extrusion cylinder 302 and act on the injection head 6 and the melting cylinder 401 to seal them, thereby ensuring stable transport of the magnesium material during die casting. Of course, the extension and retraction of the pressing hydraulic cylinder 501 is precisely controlled by a control system to accommodate different pressure requirements at different die casting stages.

[0044] In this embodiment, as shown in FIGS. 5(a) and 5(b), limit rods 7 are provided symmetrically in the vertical direction within the fixed die plate 2 to improve the stability of the melting module 4 and facilitate the installation of the pressing hydraulic cylinder 501. Specifically, connecting rods may be attached to both the top and bottom of the melting module 4, and the connecting rods may be fixed to the first ends (left ends) of the limit rods 7 to limit and lock the position of the melting module 4. Meanwhile, a vertical plate may be fixed to the second ends (right ends) of the limit rods 7 with bolts, and the pressing hydraulic cylinder 501 may then be fixed to the vertical plate to lock the pressing mechanism 5. As can be seen, the provision of a pair of limit rods 7 not only limits and locks the position of the melting module 4, but also locks and installs the pressing mechanism 5. Furthermore, the alignment of the pressing mechanism 5 and the melting module 4 is ensured, thereby ensuring the stability and safety of the entire die casting process.

[0045] 1, the injection die plate 16 is mounted to the left of the fixed die plate 2, i.e., inside the die-casting machine body 1. However, in actual use, for products with different model numbers, the injection die plate 16 will have a different model number, and the fixed die plate 2 is fixedly mounted, making it inconvenient to replace the injection die plate 16. It is also common technical knowledge for those skilled in the art that a fixed die insert is mounted on the injection die plate 16, and a movable die plate and a movable die insert connected to the movable die plate are mounted in the area corresponding to the injection die plate 16 inside the die-casting machine body 1, and the fixed die insert and the movable die insert are fitted together to form the mold cavity of the die-casting machine (i.e., the mold cavity of the mold).

[0046] Therefore, in order to solve the above technical problems, as shown in Figure 13, the entire die carrier assembly 13 may be attached to a frame within the die casting machine body 1, the fixed die plate 2 may be fixed to the right side of the die carrier assembly 13, a die carrier 14 may be slidably provided within the die carrier assembly 13, and an injection die plate 16 may be attached to the die carrier 14. A pallet hydraulic cylinder 15 is attached to the lower end of the fixed die plate 2, and one end of the piston rod of the pallet hydraulic cylinder 15 is connected to the die carrier 14.

[0047] When the pallet hydraulic cylinders 15 are retracted and the injection die plate 16 is brought close to and in contact with the fixed die plate 2, the attachment of the injection die plate 16 is completed. On the other hand, when removing the injection die plate 16, the pallet hydraulic cylinders 15 are first extended to move the injection die plate 16 away from the fixed die plate 2, and then the injection die plate 16 is removed from the die carrier 14. Compared to the prior art, this is actually a design change from the conventional attachment between the injection die plate 16 and the fixed die plate 2 to an attachment between the injection die plate 16 and the die carrier 14. To facilitate attachment and detachment of the fixed die plate 2 after attachment, the position of the die carrier 14 can be adjusted by the pallet hydraulic cylinders 15.

[0048] The operating principle of the present application is as follows.

[0049] First, the user selects the appropriate mode depending on the product to be injection molded. For example, the aluminum alloy injection mode can be selected on the die-casting machine's operation screen. This means that magnesium alloy injection is not required, and the system's preset parameters are suitable for aluminum alloy die-casting. Specifically, molten aluminum melted externally is added to the injection module 3, which then injects the molten aluminum into the die-casting machine to form the molded product.

[0050] On the other hand, when the magnesium alloy injection mode is selected, the magnesium raw material undergoes two processes under the action of the melting module 4. In the first process, as shown in FIG. 8, magnesium particles are introduced into the melting cylinder 401 through the inlet 8 (corresponding to the upper end of the injection seat 4031), and the driver 4023 rotates the screw 4022 to store the material. In this process, the screw 4022 recoils as it extrudes the magnesium particles, and the mounting block 4021 also retracts under the action of the injection hydraulic cylinder 4032. After the storage is complete, the mounting block 4021 returns to its original position under the action of the injection hydraulic cylinder 4032, forcing the semi-molten magnesium in the melting cylinder 401 through the injection head 6 into the material extrusion cylinder 302. Finally, the injection module 3 injects the semi-solid magnesium into the die, completing the entire injection process.

[0051] The material injection cylinder 301, material extrusion cylinder 302, injection nozzle 303, melting cylinder 401, and injection head 6 are all equipped with heating rings that heat the material to a semi-solid state during transport and maintain a constant temperature of the molten magnesium. Compared to conventional cold chamber die casting machines, the present invention significantly reduces the operating temperature, reducing the magnesium content of the product and the system's high power consumption, thereby significantly reducing energy consumption. Furthermore, because the magnesium melting module 4 performs injection in a completely enclosed environment, it does not require the use of SF6 protective gas, reducing costs, improving safety, and achieving environmental protection. Furthermore, by simplifying the injection system and separating the melting and injection components, the magnesium melting module 4 can be easily installed on conventional cold chamber die casting machines, reducing equipment installation and maintenance costs and achieving stable and continuous production.

[0052] The above has described the basic principles, main features, and advantages of the present application. Those skilled in the art will understand that the present application is not limited to the above embodiments, and that the above embodiments and descriptions in the specification are merely the principles of the present application. Various modifications and improvements to the present application are possible without departing from the spirit and scope of the present application, and all such modifications and improvements are included within the scope of the present application, which is sought to be protected. The scope of protection sought to be protected by the present application is defined by the appended claims and their equivalents. [Explanation of symbols]

[0053] 1 Die-casting machine body 2 Fixed die plate 3. Injection Module 301 Material injection cylinder 302 Material extrusion cylinder 303 Injection Nozzle 4 Melting Module 401 Melting Cylinder 402 Transport mechanism 4021 Mounting block 4022 screw 4023 Drive unit 403 Injection Unit 4031 Injection seat 4032 Injection moving hydraulic cylinder 5 Pressing mechanism 501 Pressing hydraulic cylinder 502 Extrusion Head 6 injection head 7 Limit Rod 8 Inlet 9 screw head 901 Rod Head 902 Breaker 903 Gasket 904 Check ring 905 Color 10 Material groove 11 Flow path 12 Gap 13 Die Carrier Assembly 14 Die Carrier 15 Pallet Hydraulic Cylinder 16 Injection die plate

Claims

1. A dual unit die casting machine including a die casting machine body, an injection module, and a magnesium alloy unit, The magnesium alloy unit comprises: A workbench and a melting cylinder attached to the work table; a transport mechanism attached to the worktable and cooperating with the melting cylinder; an injection unit attached to the worktable and cooperating with the transport mechanism; the injection module is attached to a side of the die-casting machine body so as to be aligned in a straight line with the die-casting machine body, and the melting cylinder is provided perpendicular to the die-casting machine body so as to be connected to the injection module; When performing die casting in a first mode, the injection module injects molten aluminum metal supplied from outside the dual unit die casting machine into the die casting machine body to form the aluminum metal. When performing second mode die casting of a magnesium alloy, the magnesium alloy unit is configured to perform a first step in which the transporting mechanism transports magnesium particles to fill the melting cylinder, and the magnesium particles are further smelted by the melting cylinder to form molten metallic magnesium, and a second step in which the injection unit cooperates with the transporting mechanism to inject the molten metallic magnesium from an injection head at an end of the melting cylinder through the injection module into the die-casting machine body to form the molten magnesium, a pressing mechanism is attached to the die-casting machine body, the pressing mechanism cooperating with the injection module and arranged in a straight line corresponding to the melting cylinder; the pressing mechanism abuts the injection module against the melting cylinder so that the injection module and the melting cylinder are maintained in a sealed state; the transport mechanism includes a mounting block mounted on the work table so as to be horizontally slidable, a screw located within the melting cylinder, and a drive device mounted on the mounting block; a first end of the screw rotatably mounted on the mounting block and connected to an output shaft of the drive unit by a spline; the mounting block is connected to the injection unit; When performing the first step, the driving device rotates the screw, transports the metal particles entering through the inlet of the melting cylinder, and fills the inside of the melting cylinder; further, the screw moves in a direction away from the melting cylinder due to a reaction force of the metal particles, and the injection unit drives the mounting block to move away from the melting cylinder; When performing the second step, the injection unit drives the mounting block to approach the melting cylinder, and further extrudes the molten metallic magnesium from the melting cylinder by a screw head at a second end of the screw. Dual unit die casting machine.

2. the injection module includes a material injection cylinder, a material extrusion cylinder, and an injection nozzle; The material injection cylinder is attached to a fixed die plate of the die casting machine body, and the material extrusion cylinder and the injection nozzle are sequentially connected to an end of the material injection cylinder; The injection nozzle communicates with the mold cavity of the die-casting machine body, and the material extrusion cylinder communicates with the melting cylinder.

10. The dual unit die casting machine of claim 1.

3. the inner diameter of the injection head is smaller than the inner diameter of the material extrusion cylinder; The inner diameter of the injection nozzle is smaller than the gate diameter in the mold cavity.

3. The dual unit die casting machine of claim 2.

4. the pressing mechanism includes a pressing hydraulic cylinder and an extrusion head; The pressing hydraulic cylinder is attached to the fixed die plate, and the extrusion head is attached to one end of a piston rod of the pressing hydraulic cylinder, The pressing hydraulic cylinder abuts the extrusion head against the material extrusion cylinder, and further abuts the material extrusion cylinder and the injection head to seal them.

4. The dual unit die casting machine of claim 3.

5. The fixed die plate is provided with limit rods symmetrically distributed in the up and down directions, The magnesium alloy unit is fitted to the first end of the limit rod, so that the position of the magnesium alloy unit is limited and locked; The pressing mechanism is locked and attached via the second end of the limit rod. The dual unit die casting machine according to any one of claims 2 to 4.

6. The injection unit includes an injection seat and an injection moving hydraulic cylinder; the injection seat is attached to the work table in correspondence with the mounting block; The melting cylinder is fixed to the injection seat; a first connecting seat hingedly connected to the cylinder body of the injection moving hydraulic cylinder; A second connecting seat is hingedly connected to the piston end of the injection moving hydraulic cylinder; The first connecting seat is attached to the injection seat, The second connection seat is attached to the mounting block.

10. The dual unit die casting machine of claim 1.

7. the screw head includes a rod head, a blocking portion, a check ring, a collar, and a gasket; the rod head is attached to the second end of the screw by a thread; The blocking portion and the gasket are provided outside the rod head with a gap between them, A plurality of material grooves are provided outside the blocking portion, the collar is connected to the outside of the check ring and abuts against the inner wall of the melting cylinder; the check ring is connected to the rod head in correspondence with the interval, and has an axial length shorter than the interval, and a flow path communicating with the material groove is formed between the check ring and the interval; when transporting the molten metallic magnesium, the check ring abuts against the blocking portion, a gap is formed between the check ring and the gasket, and the molten metallic magnesium is injected into the injection head through the gap, the flow path, and the material groove; When the molten metallic magnesium flows backward, the check ring comes into contact with the gasket due to the force of the flow, thereby reducing or closing the gap and buffering or blocking the force of the backward flow.

7. The dual unit die casting machine of claim 6.

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