Vertical magnesium and aluminum alloy extrusion forming machine

Abstract

The invention discloses a vertical magnesium and aluminum alloy extrusion forming machine which comprises a rack, a magnesium alloy feeding mechanism and an aluminum alloy feeding mechanism, the rack is provided with a movable mold plate located on the upper portion and a fixed mold plate located on the lower portion, and the magnesium alloy feeding mechanism is detachably installed on the side portion of the rack and connected with the fixed mold plate in a matched mode. The aluminum alloy feeding mechanism comprises an aluminum alloy feeding device and a soup feeding device. The aluminum alloy feeding device is detachably installed below the rack and connected with the fixed mold plate in a matched mode. The soup feeding device comprises a soup feeding machine, a heat preservation furnace and a slag scraping device, the heat preservation furnace is arranged beside the rack, the soup feeding machine is installed on the side portion of the rack and matched with the heat preservation furnace, and the slag scraping device is installed at the top end of the heat preservation furnace. The die-casting forming machine has the beneficial effects that the magnesium alloy feeding mechanism and the aluminum alloy feeding mechanism are detachably installed on the die-casting forming machine, different die-casting modes can be switched, and the equipment universality is improved; the slag scraping device is arranged at the top end of the heat preservation furnace, dross entering the extrusion forming link can be reduced, and the forming quality of the aluminum alloy die casting is improved.

Description

Technical Field

[0001] This application relates to the field of die casting technology, and in particular to a vertical magnesium and aluminum alloy extrusion molding machine. Background Technology

[0002] Die casting machines are machines used for pressure casting. They include both hot and cold pressure chambers. Under pressure, molten metal is hydraulically injected into a mold to cool and solidify. After the mold is opened, a solid metal casting can be obtained.

[0003] In die casting, the main types are aluminum alloy die casting and magnesium alloy die casting. In aluminum alloy die casting, existing feeding machines automatically feed the molten aluminum by scooping up a "molten metal ladle." However, the molten aluminum is exposed to air and is prone to oxidation, forming oxide inclusions on its surface. These inclusions often enter the ladle during material handling, affecting the product's molding quality. Therefore, improving existing extrusion molding machines to overcome these problems is a pressing issue for those skilled in the art. Summary of the Invention

[0004] One of the objectives of this application is to provide a vertical magnesium and aluminum alloy extrusion molding machine.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows: a vertical magnesium and aluminum alloy extrusion molding machine, comprising a frame, a magnesium alloy feeding mechanism, and an aluminum alloy feeding mechanism. The frame is provided with an upper movable template and a lower fixed template. The magnesium alloy feeding mechanism is detachably installed on the side of the frame and connected to the fixed template. The aluminum alloy feeding mechanism includes an aluminum alloy feeding device and a slag-feeding device. The aluminum alloy feeding device is detachably installed below the frame and connected to the fixed template. The slag-feeding device includes a slag-feeding machine, a heat-preserving furnace, and a slag-scraping device. The heat-preserving furnace is located beside the frame, the slag-feeding machine is installed on the side of the frame and cooperates with the heat-preserving furnace, and the slag-scraping device is installed at the top of the heat-preserving furnace. During aluminum alloy die casting, the slag-scraping device is adapted to first scrape off the slag on the surface of the molten metal in the heat-preserving furnace, and then the slag-feeding machine is adapted to scoop up the molten metal and pour it into the aluminum alloy feeding device for extrusion molding.

[0006] Preferably, the slag scraping device includes a pair of scrapers and a driving assembly. The scrapers are movably mounted on the top of the holding furnace and are symmetrically distributed via a guide structure. The driving assembly is mounted on the side of the holding furnace and its output end is connected to the scrapers. When scraping off the slag, the driving assembly is adapted to drive the scrapers through the guide structure to perform two processes, wherein the first process is: the two sets of scrapers initially moving downwards in a vertical direction to the surface of the molten metal; the second process is: the two sets of scrapers moving horizontally in opposite directions to scrape the slag to both sides.

[0007] Preferably, the guiding structure includes a pair of guide plates and a guide groove disposed on the guide plates. The guide plates are installed on both sides of the top of the heat preservation furnace. Guide blocks are installed at both ends of the scraper. The guide blocks are slidably engaged with the guide groove. The guide blocks are connected to the output end of the drive assembly. The guide groove includes a horizontal groove and a vertical groove that are connected. During the first process, the guide block engages with the vertical groove. During the second process, the guide block engages with the horizontal groove.

[0008] Preferably, the drive assembly includes a telescopic member and a pair of connecting rods. The telescopic member is vertically installed in the middle of the side of the heat preservation furnace. The first end of the connecting rod is hinged to the piston end of the telescopic member, and the second end of the connecting rod is hinged to the corresponding guide block.

[0009] Preferably, the drive assembly includes a pair of telescopic members, which are symmetrically hinged to the side of the heat preservation furnace and are inclined, and the piston end of the telescopic member is hinged to the corresponding guide block.

[0010] Preferably, the scraper is elastically rotatably mounted on the guide block via a rotating shaft, one end of which is adapted to cooperate with the guide plate via a guide assembly; when the guide block is adapted to move relative to and reset along the horizontal groove, the rotating shaft is adapted to deflect under the action of the guide assembly so that the scraper moves away from the molten metal surface; when the guide block is adapted to move upward along the vertical groove to the initial position, the two sets of scrapers are adapted to rotate and reset under the action of elastic force until they abut against each other.

[0011] Preferably, the guiding assembly includes a guide bar and a guide rod, the guide rod being mounted on one end of the rotating shaft, and the guide bar being elastically slidably mounted on the guide plate; during the second process, the guide rod is adapted to engage with the guide bar in a wedge-shaped compression fit, thereby driving the guide bar to compress into the guide plate until the two disengage; when the guide block is adapted to move and reset relative to the horizontal groove, the guide rod is adapted to be forcibly deflected under the compression of the guide bar.

[0012] Preferably, the guide block has a limiting groove on its outside, and the rotating shaft has a limiting block on its outside, with the limiting block slidingly engaging with the limiting groove; during the second process, the limiting block abuts against the end of the limiting groove so that the scraper remains vertical and thus scrapes away the scum.

[0013] Preferably, the scraper is divided into a vertical section one, a horizontal section and a vertical section two from top to bottom; the horizontal section is adapted to provide clearance space for the installation of the guide groove and the guide block, and the horizontal section and the vertical section two cooperate to form a slag scraping area.

[0014] Preferably, when the telescopic member is adapted to drive the guide block to move back to back along the horizontal groove to the limit distance via the connecting rod, the hinge point between the first end of the connecting rod and the piston end of the telescopic member and the hinge point between the second end of the connecting rod and the guide block are located on the same horizontal line.

[0015] Compared with the prior art, the beneficial effects of this application are as follows: (1) By detachably installing the magnesium alloy feeding mechanism and the aluminum alloy feeding mechanism on the die casting molding machine, the present invention can realize the switching of different die casting modes, improve the versatility of the equipment, and greatly reduce the resource waste problem of having to configure multiple machines separately for traditional single material molding machines; in addition, in view of the problem that slag is easily generated on the surface of the molten metal during the aluminum alloy die casting process, by setting a slag scraping device at the top of the holding furnace, the slag can be effectively reduced to enter the extrusion molding stage with the molten metal, thereby improving the molding quality of aluminum alloy die castings.

[0016] (2) By setting up mechanical guide components and guide structures, the present invention can realize precise motion control of the scraper during the slag scraping process, without relying on complex sensors or multiple drive sources, which greatly simplifies the control system architecture of the equipment and reduces the manufacturing cost of the device. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 This is a schematic diagram of the magnesium alloy feeding mechanism of the present invention when used in conjunction with a die-casting machine.

[0019] Figure 3 This is a schematic diagram of the aluminum alloy feeding mechanism of the present invention when used in conjunction with a die-casting machine.

[0020] Figure 4 This is a schematic diagram of the specific structure of the aluminum alloy feeding device of the present invention.

[0021] Figure 5 This is a schematic diagram of the overall structure of the slag scraping device of the present invention installed in a heat preservation furnace.

[0022] Figure 6 This is a schematic diagram of the specific structure of the slag scraping device of the present invention.

[0023] Figure 7 This is a schematic diagram of the structure of the driving component of the present invention.

[0024] Figure 8 This is a schematic diagram illustrating the working principle of the scraper of the present invention in the first process.

[0025] Figure 9 This is a schematic diagram illustrating the working principle of the scraper of the present invention in the second process.

[0026] Figure 10 This is a schematic diagram of the second structure of the driving component of the present invention.

[0027] Figure 11 This is a schematic diagram of the scraper and guide assembly of the present invention in action.

[0028] Figure 12 This is a schematic diagram of the specific structure of the guide component of the present invention.

[0029] Figure 13 This is a schematic diagram illustrating the working principle of the guide rod of the present invention when it moves vertically downward.

[0030] Figure 14 This is a schematic diagram illustrating the working principle of the present invention when the guide rod moves horizontally and cooperates with the guide strip.

[0031] Figure 15 This is a schematic diagram of the specific structure of the limiting block and limiting groove of the present invention.

[0032] Figure 16 This is a schematic diagram of the specific structure of the scraper of the present invention.

[0033] Figure 17 This is a schematic diagram illustrating the operating principle of the scraper of the present invention during slag scraping and shrinkage.

[0034] In the diagram: 1. Frame; 2. Moving template; 3. Fixed template; 4. Magnesium alloy feeding mechanism; 401. Screw conveyor; 402. Injection module; 5. Aluminum alloy feeding device; 501. Swing cylinder; 502. Injection cylinder; 503. Lifting cylinder; 504. Material cylinder assembly; 6. Soup dispenser; 601. Ladle; 7. Insulation furnace; 8. Slag scraper; 801. Scraper; 8011. Vertical section one; 8012. Horizontal section; 8013, Vertical section two; 802, Drive assembly; 8021, Telescopic component; 8022, Connecting rod; 8023, Connecting block; 9, Guide structure; 901, Guide plate; 902, Guide groove; 9021, Vertical groove; 9022, Horizontal groove; 10, Guide block; 11, Rotating shaft; 12, Guide assembly; 1201, Guide strip; 1202, Guide rod; 13, Limiting groove; 14, Limiting block. Detailed Implementation

[0035] 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.

[0036] In the description of this application, it should be noted that for directional terms such as "center," "lateral," "longitudinal," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," the indication of direction and positional relationship is based on the accompanying drawings. The orientation or positional relationship is provided only for the convenience of describing this application and simplifying the description, and is not intended to 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 scope of protection of this application.

[0037] 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.

[0038] Further description of the problems existing in the current vertical die-casting machine: (1) Vertical die casting machine is suitable for die casting of various alloys such as zinc, aluminum, magnesium, and copper. For aluminum alloys, the molten metal liquid is pure liquid, while for magnesium alloys, the die casting molten metal liquid is solid-liquid mixed state. Therefore, the relevant devices used in the two die casting modes will be different, which requires two independent die casting molding machines, which will increase equipment cost and floor space.

[0039] (2) When die casting aluminum alloys, it is generally necessary to use a molten aluminum feeder 6. The molten aluminum feeder 6 (five-link) is installed on the injection side of the die casting machine. A certain amount of molten aluminum is taken out from the holding furnace 7 (furnace) using a ladle 601 and sent to the top of the feed cylinder of the die casting machine for pouring, thus realizing automatic feeding of the die casting machine. Since the molten aluminum is exposed to the air, it is prone to oxidation, which forms oxide inclusions on the surface of the aluminum liquid. Oxidation inclusions can easily enter the ladle 601 and then enter the next die casting process, which seriously affects the die casting quality of the castings, increases the scrap rate of the products, and increases the production cost.

[0040] Therefore, the inventors of this application have developed a vertical magnesium and aluminum alloy extrusion molding machine, one embodiment of which is, for example... Figures 1 to 17As shown, the machine includes a (die-casting machine) frame 1, a magnesium alloy feeding mechanism 4, and a moving template 2 and a fixed template 3 that are parallel to each other and distributed vertically on the frame 1. The magnesium alloy feeding mechanism 4 is detachably installed on the side (i.e., horizontally) of the frame 1 and is connected to the fixed template 3. The aluminum alloy feeding mechanism includes an aluminum alloy feeding device 5 and a feeding device. The aluminum alloy feeding device 5 is detachably installed below the frame 1 and is connected to the fixed template 3.

[0041] As a further description of the above embodiments: such as Figures 1 to 4 As shown, the magnesium alloy feeding mechanism 4 includes a screw conveyor 401 and an injection module 402. The screw conveyor 401 is installed on the side of the fixed template 3 or the frame 1, and the injection module 402 is installed on the fixed template 3. The aluminum alloy feeding device 5 includes a swing cylinder 501, an injection cylinder 502, a lifting cylinder 503, and a material cylinder assembly 504. The bottom end of the cylinder body of the injection cylinder 502 is hinged to the bottom end of the inner part of the frame 1. One end of the piston rod of the injection cylinder 502 is connected to the material cylinder assembly 504. The lifting cylinder 503 can be installed outside the cylinder body of the injection cylinder 502 through a bracket. The piston end of the lifting cylinder 503 is connected to the material cylinder assembly 504. The swing cylinder 501 is laterally hinged to the lower part of the frame 1, and its piston end is hinged to the injection cylinder 502. In actual use, the magnesium alloy feeding mechanism 4 can share the swing cylinder 501, injection cylinder 502, lifting cylinder 503 and material cylinder assembly 504 in the aluminum alloy feeding device 5.

[0042] It is understandable that during aluminum alloy die casting: such as Figure 4 As shown, firstly, the swing cylinder 501 pushes the injection cylinder 502 to rotate and tilt around the bottom hinge shaft, allowing the molten aluminum 6 to pour into the material cylinder assembly 504 (i.e., the aluminum alloy material cylinder). Then, it resets, and the lifting cylinder 503 moves the aluminum alloy material cylinder mounted on it upward and clamps it with the liquid inlet of the fixed template 3. The injection cylinder 502 drives the vertical injection punch to move upward and press the aluminum into the mold cavity, completing the injection. In magnesium alloy die casting: after entering the screw conveyor 401, the magnesium particles are squeezed by the rotating screw and heated to a semi-solid state by the internal infrared heating coil. They are then injected into the injection module 402 through the screw head, and then enter the material cylinder assembly 504 (i.e., the magnesium alloy material cylinder). Subsequently, the injection cylinder 502 drives the vertical injection punch to move upward and press the magnesium into the mold cavity.

[0043] In other words, switching between magnesium and aluminum alloy die-casting modes is as simple as disassembling the conveying cylinder, injection module 402, and vertical magnesium alloy cylinder in the transverse screw conveyor 401, installing the vertical aluminum alloy cylinder, and switching the die-casting program on the screen. During the feeding and injection process of the magnesium alloy, the entire magnesium alloy slurry is in a closed environment and does not come into contact with air, thus eliminating the need for protective gas and avoiding the risks of spontaneous combustion and explosion, making it safer and more environmentally friendly.

[0044] It should be noted that the specific structures and working principles of the magnesium alloy feeding mechanism 4 and the aluminum alloy feeding mechanism mentioned above are common knowledge to those skilled in the art, and therefore will not be described in detail. The design concept of this application is to integrate the two independent feeding mechanisms, allowing them to share some core drive components. A detachable installation design enables rapid switching between the two die-casting modes, thereby effectively reducing equipment costs and floor space.

[0045] In one embodiment of this application, such as Figure 5 As shown, the molten aluminum casting device includes a molten aluminum casting machine 6, a holding furnace 7, and a slag scraping device 8. The holding furnace 7 is located next to the frame 1, the molten aluminum casting machine 6 is installed on the side of the frame 1 and works in conjunction with the holding furnace 7, and the slag scraping device 8 is installed at the top of the holding furnace 7. It can be understood that during aluminum alloy die casting, before the molten aluminum casting machine 6 drives the ladle 601 into the holding furnace 7 to scoop molten aluminum, the slag scraping device 8 can first scrape off the slag on the surface of the molten metal in the holding furnace 7, and then proceed with the "scooping" and extrusion molding process. This significantly reduces the amount of slag mixed in the molten aluminum scooped by the ladle 601, effectively reducing the impact of slag on the quality of the casting and improving the yield of the casting.

[0046] As a further description of the above embodiments: the slag scraping device 8 includes a pair of scrapers 801 and a drive assembly 802. The scrapers 801 are movably installed on the top of the holding furnace 7 through the guide structure 9 and are symmetrically distributed. The drive assembly 802 is installed on the side of the holding furnace 7 and its output end is connected to the scrapers 801.

[0047] Understandably, in the initial state, the two scrapers 801 are abutting each other and positioned directly above the (aluminum) molten metal. During slag removal, the drive assembly 802, via the guide structure 9, can drive the scrapers 801 through two processes: First, the two scrapers 801 move vertically downwards synchronously to the surface of the molten metal; second, the two abutting scrapers 801 move horizontally away from each other, thus scraping the slag within the holding furnace 7 to the sides (e.g., ...). Figure 9As shown in the diagram below, this creates a clean zone in the middle of the holding furnace 7 with little or no slag. A ladle 601 can then be inserted into this zone to scoop up the pure molten aluminum. After the scraper 801 completes its second slag-scraping action, the drive assembly 802, via the guide structure 9, will first move the scraper 801 along the horizontal groove 9022 to its initial horizontal position, and then move it upwards along the vertical groove 9021 to the initial height at the top of the holding furnace 7, completing one complete slag-scraping cycle.

[0048] It should be noted that the reason for the two-step process of the scraper 801 is that it is initially far from the molten aluminum. This is to ensure that the scraper 801 separates from the molten aluminum when not in use, preventing thermal deformation or damage from the high-temperature molten aluminum. It also prevents excessive aluminum dross from adhering to the surface of the scraper 801 during prolonged contact with the molten aluminum, which would negatively impact the scraping effect. Of course, the scraper 801 must also be made of high-temperature resistant material, and it should be cleaned or replaced promptly after a certain period of use.

[0049] like Figure 5 and Figure 6 As shown, the guide structure 9 includes a pair of guide plates 901 and a guide groove 902 disposed on the guide plates 901. The guide plates 901 are installed at both sides of the top of the holding furnace 7. Guide blocks 10 are installed at both ends of the scraper 801. The guide blocks 10 and the guide groove 902 form a sliding fit. The guide blocks 10 are connected to the output end of the drive assembly 802. The guide groove 902 includes a horizontal groove 9022 and a vertical groove 9021 that are connected. It can be understood that in the first process, the guide blocks 10 cooperate with the vertical groove 9021 to move vertically. Similarly, in the second process, the guide blocks 10 cooperate with the horizontal groove 9022 to move horizontally.

[0050] This application does not specifically limit the structure of the drive component 802. The following two specific embodiments are provided for reference: Structure 1: such as Figure 7 As shown, the drive assembly 802 includes a telescopic member 8021 and a pair of connecting rods 8022. The telescopic member 8021 is vertically installed in the middle of the side of the heat preservation furnace 7. The first end of the connecting rod 8022 is hinged to the connecting block 8023 installed on the piston end of the telescopic member 8021, and the second end of the connecting rod 8022 is hinged to the corresponding guide block 10.

[0051] Its specific working principle is as follows: Figure 8As shown in the upper figure, this is the initial state; during the scraping of scum, the telescopic component 8021 shortens and drives the connecting rod 8022 downward through the connecting block 8023, while the guide block 10 moves downward from above the vertical groove 9021, until the guide block 10 moves to the end position of the horizontal groove 9022, as shown in the figure above. Figure 8 As shown in the diagram below, the telescopic component 8021 continues to shorten, causing the connecting block 8023 to move downwards, as... Figure 9 As shown in the diagram above, under the driving force of the connecting rod 8022, the guide block 10 will move towards the other end of the horizontal groove 9022, that is, the two scrapers 801 move away from each other to scrape off the scum, and until the two scrapers 801 move to their limit positions, leaving enough space for the ladle 601 to scoop the aluminum liquid. Figure 9 The image below is shown.

[0052] Further optimized, when the two scrapers 801 move away from each other to the limit distance for scraping slag, the hinge point between the first end of the connecting rod 8022 and the piston end of the telescopic member 8021 and the hinge point between the second end of the connecting rod 8022 and the guide block 10 are located on the same horizontal line. That is to say, the two connecting rods 8022 are in the same straight line and in a horizontal state, thus forming a "dead point" position (locked position), which can keep the scraper 801 stable after scraping slag into place.

[0053] Structure 2: such as Figure 10 As shown, the drive assembly 802 includes a pair of telescopic members 8021. The telescopic members 8021 are symmetrically hinged to the side of the holding furnace 7 and are inclined. The piston end of the telescopic member 8021 is hinged to the corresponding guide block 10. This is easy to understand: under the telescopic movement of the telescopic members 8021, the guide block 10 will slide sequentially along the vertical groove 9021 and the horizontal groove 9022 of the guide groove 902, thereby realizing the vertical downward movement of the scraper 801 and the horizontal slag scraping action.

[0054] It should be noted that the specific structure and working principle of the telescopic component 8021 are well-known to those skilled in the art, and therefore will not be described in detail here. Common types include hydraulic cylinders, pneumatic cylinders, and linear motors, which can be selected by those skilled in the art according to actual needs. When using structure one, the entire system uses a single drive source (i.e., telescopic component 8021), and under the transmission action of the connecting rod 8022, it can also achieve synchronous movement of the two scrapers 801, thereby reducing the complexity and cost of the control system. Its main disadvantage is that it occupies a certain amount of installation space above the holding furnace 7. Structure two uses two independent telescopic components 8021 to drive the scrapers 801 on both sides respectively. Although this increases the number of drive sources, it can be installed on the side of the holding furnace 7, effectively saving space above the holding furnace 7. Of course, both structures can meet actual needs, and those skilled in the art can select the appropriate drive component 802 structure according to the actual scenario such as the installation space and control accuracy requirements of the equipment.

[0055] Based on the above embodiments, the following problems still exist in its use: First, it should be understood that the mutually distant sides of the two scrapers 801 (referred to as the outer sides) are the sides for scraping scum, while the adjacent sides of the two scrapers 801 (i.e., the inner sides) do not require scum removal. When the two scrapers 801 are reset along the horizontal groove 9022, the inner sides of the two scrapers 801 will move and reset along the aluminum molten metal surface. During the "scooping" process, new oxide scum may form on the aluminum molten metal surface in the cleaning zone. As a result, a large amount of oxide scum will adhere to the inner sides of the scrapers 801, thus affecting the contact state of the two scrapers 801 and affecting their service life.

[0056] Therefore, in order to solve the above-mentioned technical problems, in one embodiment of this application, such as Figure 12 As shown, the scraper 801 is elastically rotatably mounted on the guide block 10 via a rotating shaft 11. For example, the rotating shaft 11 is elastically rotatably engaged with the guide block 10 via a torsion spring, and one end of the rotating shaft 11 and the guide plate 901 are engaged via a guide assembly 12. It can be understood that when the guide block 10 moves and resets relative to the horizontal groove 9022, the rotating shaft 11 deflects under the action of the guide assembly 12, meaning the scraper 801 will move away from the molten metal surface. Figure 17 As shown in the figure below, the height difference between the scraper 801 and the molten metal surface is h. Of course, the value of h can be set by those skilled in the art according to the actual situation. When the guide block 10 moves up and resets to the initial position along the vertical groove 9021, the two scrapers 801 will reset and abut against each other under the action of elasticity, thus preparing for the next slag scraping action.

[0057] Specifically, such as Figure 12As shown, the guide assembly 12 includes a guide bar 1201 and a guide rod 1202. The guide rod 1202 is mounted on one end of the rotating shaft 11, and the guide bar 1201 can be elastically slidably mounted on the guide plate 901 via a spring. It is understood that during the second process, the guide rod 1202 will move horizontally with the guide block 10 and come into contact with the guide bar 1201. One end of the guide bar 1201 has an inclined surface, and the elastic limiting force of the rotating shaft 11 is greater than the elastic limiting force of the guide bar 1201. Therefore, under the wedge-shaped pressing cooperation between the guide rod 1202 and one end of the guide bar 1201, the guide bar 1201 will retract inwards towards the guide plate 901 (i.e., during the slag scraping process, the scraper 801 will remain vertical under the action of elasticity), until the guide rod 1202 and the guide bar 1201 are just misaligned. At this point, the guide bar 1201 will pop out and reset under the action of elasticity. When the scraper 801 retracts and resets, i.e., the guide block 10 moves and resets along the horizontal groove 9022, since the other end of the guide bar 1201 has no inclined structure, the guide rod 1202 and the guide bar 1201 will make hard contact and squeeze. The guide bar 1201 is subjected to a force perpendicular to its sliding direction, so it will not retract inward. As a result, the guide rod 1202 will drive the rotating shaft 11 to deflect forcibly until the guide rod 1202 abuts against the top of the guide bar 1201, so that the scraper 801 rotates away from the aluminum molten metal surface. When the guide block 10 moves and resets along the vertical groove 9021, the guide rod 1202 and the guide bar 1201 will disengage, and the two sets of scrapers 801 will rotate and reset until they abut against each other.

[0058] Further optimization, such as Figure 15 As shown, the guide block 10 has a limiting groove 13 on its outside, and the rotating shaft 11 has a limiting block 14 on its outside. The limiting block 14 slides in conjunction with the limiting groove 13, meaning that the rotating shaft 11 can only rotate within a certain angle range due to the cooperation between the limiting block 14 and the limiting groove 13. Specifically, we take... Figure 15From the perspective of the first step, initially, the limiting block 14 abuts against the right end of the limiting groove 13 under the elastic force of the torsion spring, and at this time the scraper 801 is in a vertical state. During the second process, the guide rod 1202 will have a clockwise rotation tendency when subjected to force. Under the abutting action of the limiting block 14 and the limiting groove 13, the rotating shaft 11 can be stably kept in the initial position to achieve stable operation of the scraper 801. When the scraper 801 retracts and resets, the guide rod 1202 rotates counterclockwise under force. This means that the limiting block 14 moves from the right end of the limiting groove 13 to the left end. When the scraper 801 rotates away from the surface of the aluminum molten metal, the limiting block 14 abuts against the left end of the limiting groove 13, and the guide rod 1202 abuts against the top end of the guide bar 1201. This locks and limits the circumferential direction of the rotating shaft 11, preventing vibration and deflection when the scraper 801 moves horizontally to reset, and ensuring its stability during retraction.

[0059] Further optimization, such as Figure 16 As shown, the scraper 801 is divided into three sections from top to bottom: a vertical section 8011, a horizontal section 8012, and a second vertical section 8013. It can be understood that the horizontal section 8012 is designed to keep the upper installation positions of the two scrapers 801 apart, thus providing clearance for the guide groove 902 and the guide block 10, preventing the scrapers 801 from being misaligned due to structural interference in the initial state. Figure 17 As shown in the diagram above, the horizontal section 8012 and the vertical section 8013 work together to form a slag scraping zone. In other words, when slag is scraped, the slag accumulates in the slag scraping zone. The blocking effect of the horizontal section 8012 prevents the slag from adhering to the upper part of the scraper 801, thus ensuring the cleanliness of the scraper 801.

[0060] To facilitate understanding of the slag removal process inside the holding furnace 7, its working principle is described below: Firstly, as Figure 5 and Figure 6 As shown, the scraper 801 is in the initial contraction state at this time. The drive assembly 802 is illustrated using structure one as an example. Figure 8 As shown in the diagram above, this is the initial state of the drive assembly 802. During slag scraping: ① The telescopic component 8021 shortens and drives the connecting rod 8022 downward through the connecting block 8023. At the same time, the guide block 10 moves downward from above the vertical groove 9021 until it reaches the end position of the horizontal groove 9022. The two scrapers 801 move vertically downward simultaneously to the surface of the molten metal, which is the first process of the scraper 801's action. Meanwhile, as... Figure 13As shown in the upper and lower figures, the guide rod 1202 will move downwards to align with the guide strip 1201. ② The telescopic component 8021 continues to shorten, causing the connecting block 8023 to move downwards, as shown... Figure 9 As shown in the diagram above, under the driving force of the connecting rod 8022, the guide block 10 will move towards the other end of the horizontal groove 9022, that is, the two scrapers 801 move away from each other to scrape off the scum (as shown in the diagram above). Figure 17 (As shown in the image above), and until the two scrapers 801 move to their extreme positions, leave enough space for the ladle 601 to scoop the molten aluminum, as shown in the image above. Figure 9 The diagram below illustrates the second phase of the scraper 801's operation. Simultaneously, the wedge-shaped compression between the guide rod 1202 and one end of the guide strip 1201 causes the guide strip 1201 to retract inwards towards the guide plate 901 until the guide rod 1202 and guide strip 1201 are just misaligned. At this point, the guide strip 1201 springs back to its original position under elastic force. Figure 14 As shown in the diagram above. ③ The scraper 801 retracts, and the telescopic component 8021 extends. At this time, the two scrapers 801 will move relatively close to each other horizontally under the action of the guide block 10, which is the reverse process of the second process. At the same time, the guide rod 1202 will be forcibly deflected under the hard compression of the guide bar 1201, which will cause the scraper 801 to rotate away from the surface of the aluminum molten metal. When the guide block 10 moves upward along the vertical groove 9021 to the initial position (i.e., the reverse process of the first process), the guide rod 1202 will disengage from the guide bar 1201, and the scraper 801 will rotate back to the initial state.

[0061] It should be noted that the retraction and reset of the scraper 801 after one slag scraping can be set according to the actual situation. That is to say, a slag scraping operation is not performed immediately after each time the ladle 601 "scoops soup". Those skilled in the art can adapt the slag scraping cycle according to the rate and size of the new oxide slag formed in the clean area after slag scraping. In addition, the driving source used in this application only requires one or a pair of telescopic parts 8021, in conjunction with the mechanical guide structure 9 and guide assembly 12, etc., to realize a series of complex actions such as vertical movement, horizontal movement and deflection reset of the scraper 801, without relying on complex sensors or multiple sets of driving source control, which greatly simplifies the control system architecture of the equipment, and the continuity between the various actions is good. Of course, attention should also be paid to the dust prevention, lubrication and maintenance of the mechanical structure. In actual application, the liquid level of the aluminum molten metal in the holding furnace 7 will change after being scooped, therefore, if Figure 11As shown, the entire device can be mounted on the holding furnace 7 via a height adjustment component (such as a hydraulic cylinder or a motor screw structure), thereby allowing the scraper 801 to adapt to changes in the liquid level. Of course, some intelligent holding furnaces 7 maintain the liquid level within the optimal working range to ensure the quality of the molten aluminum, i.e., a low liquid level would cause greater temperature fluctuations in the molten aluminum, which is not conducive to heat preservation. This is known as a quantitative holding furnace.

[0062] 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 vertical magnesium-aluminum alloy extrusion press characterized by, The utility model relates to a magnesium alloy and aluminum alloy combined feeding mechanism for die-casting machine, which comprises a rack, a magnesium alloy feeding mechanism and an aluminum alloy feeding mechanism. The magnesium alloy feeding mechanism is detachably installed on the side of the rack and connected with the fixed mold plate. The aluminum alloy feeding mechanism comprises an aluminum alloy feeding device and a feeding device. The feeding device comprises a feeding machine, a holding furnace and a slag scraping device. The holding furnace is arranged beside the rack, the feeding machine is installed on the side of the rack and connected with the holding furnace, and the slag scraping device is installed on the top end of the holding furnace.

2. The vertical magnesium, aluminum alloy extrusion press of claim 1 wherein: When the aluminum alloy is die-cast, the slag scraping device is suitable for scraping the floating slag on the liquid metal surface in the holding furnace first, and then the feeding machine is suitable for pouring the liquid metal into the aluminum alloy feeding device for extrusion molding. The slag scraping device comprises a pair of scrapers and a driving assembly.

3. The vertical magnesium, aluminum alloy extrusion press defined in claim 2, wherein: When the floating slag is scraped, the driving assembly is suitable for driving the scrapers to move in two processes through the guide structure.

4. The vertical magnesium, aluminum alloy extrusion press defined in claim 3, wherein: The first process is that two groups of scrapers initially abutting move downward along the vertical direction to the liquid metal surface.

5. The vertical magnesium, aluminum alloy extrusion press according to claim 3 wherein: The second process is that two groups of scrapers move horizontally away from each other to scrape the floating slag to both sides.

6. The vertical magnesium, aluminum alloy extrusion press defined in Claim 4 or 5, wherein: The guide structure comprises a pair of guide plates and guide grooves arranged on the guide plates. The guide plates are installed on both sides of the top end of the holding furnace.

7. The vertical magnesium, aluminum alloy extrusion press defined in claim 6, wherein: The two ends of the scrapers are provided with guide blocks which are slidably connected with the guide grooves. The guide blocks are connected with the output end of the driving assembly. The guide grooves comprise horizontal grooves and vertical grooves which are connected. When the first process is performed, the guide blocks are connected with the vertical grooves. When the second process is performed, the guide blocks are connected with the horizontal grooves. The driving assembly comprises a pair of extension members and a pair of connecting rods. The extension members are vertically installed in the middle of the side of the holding furnace. The first end of the connecting rod is hingedly connected with the piston end of the extension member. The second end of the connecting rod is hingedly connected with the corresponding guide block. The extension members are hingedly installed on the side of the holding furnace and are arranged in an inclined manner. The piston end of the extension member is hingedly connected with the corresponding guide block. The scraper is elastically rotatably installed on the guide block through a rotating shaft. When the guide block is suitable for moving relatively along the horizontal groove to reset, the rotating shaft is suitable for deflecting under the action of the guide assembly so that the scraper is away from the liquid metal surface. When the guide block is suitable for moving upward along the vertical groove to the initial position, two groups of scrapers are suitable for rotating and resetting under the action of the elastic force until abutting. The guide assembly comprises a guide strip and a guide rod. The guide rod is installed on one end of the rotating shaft. The guide strip is elastically slidably installed on the guide plate. In the second process, the guide rod is adapted to wedge-extrude the guide strip, thereby driving the guide strip to compress into the guide plate and disengage from the guide plate; when the guide block is adapted to move relatively along the horizontal slot to reset, the guide rod is adapted to be forced to deflect under the extrusion of the guide strip.

8. The vertical magnesium, aluminum alloy extrusion press defined in claim 7, wherein: The guide block has a limiting slot on the outside, and the rotating shaft has a limiting block on the outside, which is in sliding fit with the limiting slot; in the second process, the limiting block abuts against the end of the limiting slot, so that the scraper remains in a vertical state and thereby scrapes off the scum.

9. The vertical magnesium, aluminum alloy extrusion press according to claim 3, wherein: The scraper is sequentially divided into vertical section one, horizontal section and vertical section two from top to bottom; the horizontal section is adapted to provide a clearance for the installation of the guide slot and the guide block, and the horizontal section cooperates with the vertical section two to form a scum scraping area.

10. The vertical magnesium, aluminum alloy extrusion press according to claim 4 wherein: When the telescopic member is adapted to move the guide block to the limit distance in the opposite direction along the horizontal slot through the connecting rod, the hinging point between the first end of the connecting rod and the piston end of the telescopic member and the hinging point between the second end of the connecting rod and the guide block are located on the same horizontal line.

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