A casting mechanism and equipment and method for extruding magnesium alloy castings.

Abstract

This invention discloses a casting mechanism and an equipment and method for extruding magnesium alloy castings, belonging to the field of casting technology. The casting mechanism includes a base and further includes: a mold section, comprising a fixed mold base fixedly mounted on the base and a movable mold base slidably connected to the base; both the fixed and movable mold bases have cavities, which together form a die-casting cavity; a hydraulic cylinder, fixedly mounted on the base via a first connecting plate, with its piston rod connected to the movable mold base; and a transfer mechanism, connected to the movable mold base, for transferring the castings within the cavity of the movable mold base. This invention achieves automatic material handling through a linkage mechanical structure, significantly reducing equipment costs compared to dedicated robotic arms. It solves the problems of high cost, low efficiency, and high error rate associated with existing robotic arm material handling systems, making it suitable for small- to medium-scale magnesium alloy die-casting production scenarios.

Description

Technical Field

[0001] This invention relates to the field of casting technology, and in particular to a casting mechanism and equipment and method for extruding magnesium alloy castings. Background Technology

[0002] Die casting is a metal casting process characterized by applying high pressure to molten metal within a mold cavity. The mold is typically made of a high-strength alloy, and the process is somewhat similar to injection molding. Most die-cast parts are iron-free, containing elements such as zinc, copper, aluminum, magnesium, lead, tin, and lead-tin alloys and their alloys. Depending on the type of die casting, either a cold chamber die casting machine or a hot chamber die casting machine is required.

[0003] Currently, there are two common material handling methods for die-casting machines. The first is robotic arm handling: using a specially designed robotic arm, through programming and control systems, to precisely grasp the die-cast parts. The robotic arm can be flexibly adjusted according to the shape, size, and position of the parts. The second is manual handling: operators wearing protective equipment, such as high-temperature resistant gloves, directly remove the parts from the mold after it is opened. While using robotic arms is convenient and fast, the manufacturing cost of the robotic arms is high, which increases the overall production cost. Manual handling, on the other hand, is less efficient and poses certain dangers to workers. Summary of the Invention

[0004] The purpose of this invention is to solve the problems existing in the prior art, and to propose a casting mechanism and equipment and method for extruding magnesium alloy castings.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A casting mechanism, including a base, further comprising:

[0007] The mold part includes a fixed mold base fixedly mounted on a base and a movable mold base slidably connected to the base. Both the fixed mold base and the movable mold base have cavities, and the two cavities together form a die-casting cavity.

[0008] A hydraulic cylinder is fixedly mounted on a base via a first connecting plate, and the piston rod of the hydraulic cylinder is connected to a moving mold base.

[0009] A transfer mechanism, which is connected to the moving mold base, is used to transfer the castings inside the cavity of the moving mold base;

[0010] The transfer mechanism has a receiving station facing the casting inside the moving mold base cavity and a delivery station for transferring the casting to the side of the mold section.

[0011] Preferably, the moving mold base has a groove, a movable plate is slidably connected in the groove, a first elastic element is provided between the movable plate and the inner wall of the groove, a push rod is fixedly provided on the movable plate and slidably connected in the moving mold base for ejecting the casting in the mold cavity of the moving mold base, and a fixing rod is fixedly provided on the first connecting plate and moves against the end of the push rod.

[0012] Preferably, the transfer mechanism includes a drive unit disposed on the side of the moving mold base, a first lead screw rotatably connected to the drive unit, a first sleeve threadedly connected to the first lead screw, and a receiving rack disposed on the top of the first sleeve.

[0013] Preferably, a wear-resistant rubber pad is fixedly provided on the inner side wall of the receiving rack, and a bending plate that moves against the casting is provided at the bottom of the receiving rack.

[0014] Preferably, the drive unit includes fixed plates symmetrically fixed on the moving mold base, screws rotatably connected to each fixed plate, driven gears disposed on the lower side of the screws, rack plates fixedly disposed on the outer side of the base and meshing with the driven gears, worm gears disposed on the screws, and worm wheels disposed on the first lead screws and meshing with the worm gears.

[0015] Preferably, the drive unit further includes a second sleeve that is threadedly connected to the left and right screws respectively. The worm gear is rotatably connected to the second sleeve on the corresponding screw and is slidably disposed with the screw. A side plate is fixedly disposed on the second sleeve, and the first lead screw is rotatably connected to the side plate.

[0016] Preferably, a guide bar is fixedly provided on the inner side wall of the worm gear, and a guide groove that cooperates with the guide bar is provided on the outer side wall of the screw.

[0017] Preferably, a support plate is fixedly provided on one side of the outer wall of the moving mold base, a second lead screw is rotatably connected to the support plate, a third sleeve is threadedly connected to the second lead screw, a telescopic rod is provided between the top of the third sleeve and the bottom of the receiving frame, the end of the receiving frame away from the telescopic rod is rotatably connected to the first sleeve through a pin, a secondary bevel gear is provided on the second lead screw, and a main bevel gear that meshes with the secondary bevel gear is provided on one of the lead screws.

[0018] An apparatus for extruding magnesium alloy castings includes the aforementioned casting mechanism, and further includes an injection device disposed on the upper side of a base via a second connecting plate. The discharge port of the injection device is connected to the injection port of a fixed mold base, and the injection port is in communication with the cavity of the fixed mold base.

[0019] This invention also discloses a method of using equipment for extrusion casting of magnesium alloy castings, comprising the following steps:

[0020] S1: Mold Closing Stage:

[0021] The hydraulic cylinder pushes the moving mold base to move towards the fixed mold base, so that the cavities of the two mold bases close together to form a die-casting cavity. The receiving rack is placed horizontally on the side of the fixed mold base and is in standby mode.

[0022] S2: Injection and Molding Stage:

[0023] The injection equipment injects molten magnesium alloy material into the die-casting cavity through the injection port, maintaining the mold temperature within the range of 200-300℃ to ensure that the magnesium alloy fully fills the cavity. After the material cools, the casting is formed in the die-casting cavity.

[0024] S3: Mold Opening and Material Removal Stage

[0025] When the hydraulic cylinder retracts, the piston rod drives the moving mold base to move back. When the moving mold base moves, the driven gear meshes with the rack plate to drive the screw to rotate. The rotation of the screw drives the second sleeve to move upward. Through the meshing of the worm and worm wheel, the first lead screw rotates. The first sleeve drives the receiving frame to move along the axial direction of the first lead screw.

[0026] At the same time, the meshing of the main bevel gear and the secondary bevel gear causes the second lead screw to rotate, which in turn drives the receiving frame to rotate around the connection point with the first sleeve pin through the telescopic rod.

[0027] S4: Material feeding and receiving stage:

[0028] As the moving mold base continues to move back, the ejector rod and the fixed rod end abut against each other, and the ejector rod slides under force, pushing the casting out of the moving mold base cavity. At this time, the receiving rack is horizontally attached to one side of the moving mold base cavity to catch the ejected casting.

[0029] S5: Transfer and Reset Phase

[0030] The hydraulic cylinder piston rod extends again, the moving mold base closes to the fixed mold base, and the receiving rack flips from the receiving station to the delivery station, transferring the casting to the side of the mold.

[0031] The mechanism is reset, ready for the next cycle.

[0032] As can be seen from the above technical solutions, the present invention has the following beneficial effects:

[0033] 1. In this invention, an automatic material handling system is achieved by using a linkage mechanical structure and the mold opening and closing motion as the sole power source. The equipment cost is significantly lower than that of a dedicated robotic arm. This solves the problems of high cost, low efficiency, and risks of high temperature burns and mechanical injuries associated with existing robotic arm material handling systems. It ensures production efficiency while reducing production costs and is suitable for small and medium-scale magnesium alloy die casting production scenarios.

[0034] 2. In this invention, by placing the receiving rack horizontally on the side of the mold section when not in operation, the problem of traditional material handling mechanisms occupying a large space and affecting equipment layout is solved. The receiving rack in this application can be flipped and stored, which significantly saves space.

[0035] 3. In this invention, by placing the receiving rack on the lower side when not in operation, it facilitates transportation and storage. When the receiving rack is in operation for receiving and transferring materials, it moves upward, which shortens the distance between the receiving rack and the casting, reduces the falling distance of the casting, reduces the impact force, avoids deformation and damage, and ensures the quality of the finished casting. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the receiving rack of the present invention when it is in the receiving station. Figure 1 ;

[0037] Figure 2 This is a schematic diagram of the receiving rack of the present invention when it is in the receiving station. Figure 2 ;

[0038] Figure 3 For the present invention Figure 2 Enlarged structural diagram of section A in the middle;

[0039] Figure 4 This is a schematic diagram of the receiving rack of the present invention when it is in the feeding position;

[0040] Figure 5 This is a cross-sectional structural diagram of the mold section of the present invention;

[0041] Figure 6 This is a schematic diagram of the external structure of the moving mold base of the present invention;

[0042] Figure 7 This is a schematic diagram of the external structure of the fixed mold base of the present invention;

[0043] Figure 8 This is a schematic diagram of the transfer mechanism of the present invention. Figure 1 ;

[0044] Figure 9 This is a schematic diagram of the transfer mechanism of the present invention. Figure 2 ;

[0045] Figure 10 For the present invention Figure 9 Enlarged structural diagram of section B;

[0046] Figure 11 This is a schematic diagram of the screw and worm gear of the present invention.

[0047] In the diagram: 1. Base; 101. First connecting plate; 1011. Fixing rod; 102. Second connecting plate; 2. Fixed mold base; 201. Injection port; 3. Moving mold base; 4. Hydraulic cylinder; 5. Groove; 501. Movable plate; 502. First elastic element; 503. Push rod; 6. First lead screw; 601. First sleeve; 602. Receiving rack; 6021. Bending plate; 603. Wear-resistant rubber pad; 7. Drive unit; 70 1. Fixed plate; 702. Screw; 7021. Guide groove; 7022. Main bevel gear; 703. Driven gear; 704. Rack plate; 705. Worm; 7051. Guide bar; 706. Worm wheel; 707. Second sleeve; 708. Side plate; 8. Support plate; 801. Second lead screw; 8011. Secondary bevel gear; 802. Third sleeve; 803. Telescopic rod; 9. Injection equipment; 10. Die casting cavity. Detailed Implementation

[0048] A preferred embodiment of the present invention will now be described in detail with reference to the accompanying drawings.

[0049] To achieve the above objectives, the embodiments of the present invention adopt the following technical solutions:

[0050] Reference Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 6 As shown, this embodiment proposes a casting mechanism, including a base 1, and further including a mold part, a hydraulic cylinder 4, and a transfer mechanism. The mold part of the casting mechanism consists of a fixed mold base 2 and a moving mold base 3, both of which are provided with matching cavity structures. The fixed mold base 2 is fixedly connected to the base 1 by bolts to ensure stability during the molding process. The moving mold base 3 is slidably connected to the base 1, and the sliding surface is treated with wear-resistant alloy material to ensure guiding accuracy for long-term use. When the two mold bases are closed, their cavities are precisely aligned to form a complete die-casting cavity 10. The cavity surface is specially polished to meet the surface quality requirements of magnesium alloy castings. The hydraulic cylinder 4 is fixed to the base 1 by a high-strength first connecting plate 101. The piston rod end is connected to the moving mold base 3 by a flange. The hydraulic cylinder 4 should be equipped with an accumulator and a proportional valve to realize the fast and slow speed conversion of the moving mold base 3 and ensure that the mold closing process is smooth and impact-free. The transfer mechanism is connected to the moving mold base 3. The transfer mechanism adopts a compound motion design and is used to transfer the castings in the cavity of the moving mold base 3. Among them, the active stroke of the transfer mechanism has a receiving station facing the castings in the cavity of the moving mold base 3 and a delivery station for transferring the castings to the side of the mold section.

[0051] This application achieves automatic material handling through a linkage transfer mechanical structure. The equipment cost is significantly lower than that of a dedicated robotic arm, solving the problems of high cost, low efficiency, and risks of high temperature burns and mechanical injuries associated with existing robotic arm material handling systems. It ensures production efficiency while reducing production costs, making it suitable for small and medium-scale magnesium alloy die casting production scenarios.

[0052] Reference Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 6 As shown, in a preferred embodiment, based on the above method, further, a groove 5 is provided in the moving mold base 3, and a movable plate 501 is slidably connected in the groove 5. The movable plate 501 is made of high-strength alloy steel and is quenched to form a precise sliding fit with the groove 5 with a fit clearance of 0.02-0.05mm to ensure smooth movement without jamming. A first elastic element 502 is provided between the movable plate 501 and the inner wall of the groove 5. The first elastic element 502 is a stainless steel spiral compression spring. During installation, it is fixed between the inner wall of the groove 5 and the movable plate 501 by a spring seat. Positioning bosses should be provided at both ends of the spring to prevent skewing during operation. A push rod 503 is fixedly provided on the movable plate 501, which is slidably connected in the moving mold base 3 and is used to eject the casting in the mold cavity of the moving mold base 3. A fixing rod 1011 is fixedly provided on the first connecting plate 101 to move against the end of the push rod 503.

[0053] Specifically, in the initial state: the moving mold base 3 is in the closed position, the movable plate 501 is subjected to the pre-pressure of the first elastic element 502, and the ejector rod 503 retracts into the moving mold base 3; during the mold opening process: the moving mold base 3 begins to move back, driving the ejector rod 503 to move synchronously. When the moving mold base 3 moves a set distance, the fixed rod 1011 contacts the end of the ejector rod 503, and the ejector rod 503 pushes the movable plate 501 to compress the first elastic element 502. The ejector rod 503 extends outward relative to the moving mold base 3, ejecting the casting from the mold cavity; in the reset stage: the moving mold base 3 begins to close, the first elastic element 502 releases its stored energy, pushes the movable plate 501 to reset, and the ejector rod 503 retracts into the moving mold base 3, restoring the initial gap and completing the entire ejection-reset cycle.

[0054] Reference Figure 1 , Figure 2 , Figure 4 , Figure 7 and Figure 8As shown, in a preferred embodiment, based on the above method, the transfer mechanism further includes a drive unit 7 disposed on the side of the moving mold base 3, a first lead screw 6 rotatably connected to the drive unit 7, a first sleeve 601 threadedly connected to the first lead screw 6, and a receiving rack 602 disposed on the top of the first sleeve 601; the drive unit 7 is fixedly installed on the side of the moving mold base 3 and is connected by high-strength bolts to ensure stability in a vibration environment, and contains a precision transmission mechanism inside; the first lead screw 6 should be provided with dustproof sealing rings at both ends to prevent metal dust from entering during the die casting process;

[0055] When the moving mold base 3 is in the mold closing position, the first sleeve 601 is located at the outermost position of the first lead screw 6, i.e., the origin position. At this time, the receiving rack 602 is located on one side of the mold part. When the moving mold base 3 begins to move back to open the mold, the driving part 7 drives the first lead screw 6 to rotate, and the first sleeve 601 moves along the axial direction of the first lead screw 6. The first sleeve 601 drives the receiving rack 602 to move to the front of the cavity of the moving mold base 3. At this time, the receiving rack 602 is in the receiving position. The receiving rack 602 receives the casting ejected by the ejector rod 503. When the moving mold base 3 moves to the fixed mold base 2 to close the mold, the receiving rack 602 drives the received casting to reset and move back to the delivery position.

[0056] Reference Figure 8 , Figure 9 and Figure 10 As shown, in a preferred embodiment, based on the above method, a wear-resistant rubber pad 603 is fixedly provided on the inner side wall of the receiving rack 602, and a bending plate 6021 that moves against the casting is provided at the bottom of the receiving rack 602; the receiving rack 602 is an L-shaped steel structure, with a thick heat-resistant and wear-resistant rubber pad 603 embedded on the inner side, which can withstand a temperature of 250°, and a hinge seat connected to the first sleeve 601 at the bottom, which is connected by a pin shaft, allowing the receiving rack 602 to rotate within a range of ±90°, and the casting ejected from the cavity of the moving mold base 3 falls onto the receiving rack 602. The bending plate 6021 provided at the bottom of the receiving rack 602 can effectively limit the slippage of the casting during transfer.

[0057] Reference Figure 1 , Figure 2 , Figure 4 , Figure 8 , Figure 9 , Figure 10 and Figure 11As shown, in a preferred embodiment, based on the above method, the drive unit 7 further includes a fixed plate 701 symmetrically fixed on the moving mold base 3, a screw 702 rotatably connected to each fixed plate 701, a driven gear 703 disposed on the lower side of the screw 702, a rack plate 704 fixedly disposed on the outside of the base 1 and meshing with the driven gear 703, a worm gear 705 disposed on the screw 702, and a worm wheel 706 disposed on the first lead screw 6 and meshing with the worm gear 705; the fixed plate 701 is integrally cast from high-strength cast iron and is fixed to the side of the moving mold base 3 by high-strength bolts to ensure the stability of the reference plane of the transmission system; the fixed plate 701 is provided with a bearing seat hole for installing an angular contact ball bearing supporting the screw 702;

[0058] Furthermore, the drive unit 7 also includes a second sleeve 707 that is threadedly connected to the left and right screws 702 respectively. The worm gear 705 is rotatably connected to the second sleeve 707 on the corresponding screw 702 and is slidably disposed with the screw 702. A side plate 708 is fixedly disposed on the second sleeve 707. The first lead screw 6 is rotatably connected to the side plate 708. A guide bar 7051 is fixedly disposed on the inner side wall of the worm gear 705. A guide groove 7021 that cooperates with the guide bar 7051 is opened on the outer side wall of the screw 702.

[0059] Specifically, when the moving mold base 3 is in the mold-closed position, the driven gear 703 is not engaged with the rack plate 704; during the mold-opening drive phase, the hydraulic cylinder 4 begins to retract, driving the moving mold base 3 to move, and the fixed plate 701 moves synchronously with the moving mold base 3. During this period, the driven gear 703 engages with the rack plate 704, and the rotation of the driven gear 703 drives the screw 702 to rotate. The screw 702 drives the worm gear 705 to rotate through the guide bar 7051, causing the worm gear 705 to drive the worm wheel 706 to rotate. The first lead screw 6 rotates, and the transfer mechanism starts working. When the second sleeve 707 receives material, it uses the side plate 708 to drive the first lead screw 6 and the receiving rack 602 set on the upper side of the first lead screw 6 to move upward. This can shorten the distance between the receiving rack 602 and the casting, reduce the falling distance of the casting, reduce the impact force, avoid deformation and damage, and ensure the quality of the finished casting. When the transfer mechanism is not working, the receiving rack 602 is on the lower side, which makes it easier to reduce its space occupation and facilitate its transportation and storage.

[0060] Reference Figure 1 , Figure 2 , Figure 3 , Figure 8 and Figure 9As shown, in a preferred embodiment, based on the above method, a support plate 8 is fixedly provided on one side of the outer wall of the moving mold base 3. A second lead screw 801 is rotatably connected to the support plate 8. A third sleeve 802 is threadedly connected to the second lead screw 801. A telescopic rod 803 is provided between the top of the third sleeve 802 and the bottom of the receiving frame 602. The end of the receiving frame 602 away from the telescopic rod 803 is rotatably connected to the first sleeve 601 through a pin. A secondary bevel gear 8011 is provided on the second lead screw 801. A main bevel gear 7022 that meshes with the secondary bevel gear 8011 is provided on one of the screws 702.

[0061] Specifically, during mold closing, the receiving rack 602 is horizontally positioned on the side of the fixed mold base 2, i.e., in the placement position; when the transfer mechanism is working, the first sleeve 601 drives the receiving rack 602 to move from one end of the cavity of the moving mold base 3 to the other end; and when the screw 702 rotates, the main bevel gear 7022 meshes with the secondary bevel gear 8011 on the second lead screw 801, causing the third sleeve 802 to move axially along the second lead screw 801. The third sleeve 802 drives the receiving rack 602 to rotate through the telescopic rod 803, so that the receiving rack 602 is centered on the pin connection between the first sleeve 601 and the receiving rack 602. As the mold base 3 continues to move back, the ejector rod 503 abuts against the end of the fixed rod 1011. The ejector rod 503 slides under force on the mold base 3, thus pushing the casting out of the cavity of the mold base 3. At this time, the receiving rack 602 is horizontally attached to one side of the cavity of the mold base 3, located at the receiving station. The ejected casting falls into the receiving rack 602, which solves the problem of large space occupation and impact on equipment layout of traditional material handling mechanisms. The receiving rack 602 in this application can be flipped and stored, which significantly saves space. Moreover, the mold opening and closing motion is used as the only power source, and the direction of motion is changed through bevel gears.

[0062] Reference Figure 1 , Figure 2 , Figure 4 and Figure 7As shown, based on the above embodiments, this embodiment proposes an extrusion casting equipment for magnesium alloy castings, including the aforementioned casting mechanism, and also including an injection device 9 disposed on the upper side of the base 1 via a second connecting plate 102. The outlet of the injection device 9 is connected to the injection port 201 of the fixed mold base 2, and the injection port 201 is interconnected with the cavity of the fixed mold base 2. The injection device 9 is existing technology, such as a mechanical pump quantitative gating system or other gating systems. The injection device 9 injects magnesium alloy molten metal through the injection port 201 in a three-stage "slow-fast-slow" manner, with the temperature controlled at 680±10℃. The low-speed stage is 0.3m / s: to ensure that the melt fills the cavity smoothly and avoids air entrapment; the high-speed stage is 2.5m / s: to quickly complete the cavity filling, with the time controlled at 30-50ms; the pressure-boosting stage is 40MPa: to eliminate shrinkage defects, with a holding time of 2-3s; the mold temperature is maintained at 200-220℃ by a mold temperature controller to ensure uniform solidification of the casting.

[0063] This invention also discloses a method of using equipment for extrusion casting of magnesium alloy castings, comprising the following steps:

[0064] S1: Mold Closing Stage:

[0065] The hydraulic cylinder 4 pushes the moving mold base 3 to move towards the fixed mold base 2, so that the two mold base cavities are closed to form the die casting cavity 10. The receiving rack 602 is horizontally placed on the side of the fixed mold base 2 and is in standby state.

[0066] S2: Injection and Molding Stage:

[0067] The injection equipment 9 injects molten magnesium alloy material into the die casting cavity 10 through the injection port 201, keeping the mold temperature within the range of 200-300℃ to ensure that the magnesium alloy fully fills the cavity. After the material cools, a casting is formed in the die casting cavity 10.

[0068] S3: Mold Opening and Material Removal Stage

[0069] When the hydraulic cylinder 4 retracts, the piston rod drives the moving mold base 3 to move back. When the moving mold base 3 moves, the driven gear 703 meshes with the rack plate 704 to drive the screw 702 to rotate. The rotation of the screw 702 drives the second sleeve 707 to move upward. Through the worm gear 705 meshing with the worm wheel 706, the first lead screw 6 rotates. The first sleeve 601 drives the receiving frame 602 to move axially along the first lead screw 6.

[0070] At the same time, the main bevel gear 7022 meshes with the secondary bevel gear 8011 to rotate the second lead screw 801, which in turn drives the receiving frame 602 to rotate around the pin connection point with the first sleeve 601 via the telescopic rod 803.

[0071] S4: Material feeding and receiving stage:

[0072] As the moving mold base 3 continues to move back, the ejector rod 503 abuts against the end of the fixed rod 1011, and the ejector rod 503 slides under force, pushing the casting out of the cavity of the moving mold base 3. At this time, the receiving rack 602 is horizontally attached to one side of the cavity of the moving mold base 3 to catch the ejected casting.

[0073] S5: Transfer and Reset Phase

[0074] The piston rod of hydraulic cylinder 4 extends again, the moving mold base 3 surrounds the fixed mold base 2, and the receiving rack 602 flips from the receiving station to the delivery station, transferring the casting to the side of the mold.

[0075] The mechanism is reset, ready for the next cycle.

[0076] The above-described embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A foundry installation comprising a base (1), characterized in that, Also include: The mold part includes the mold base (2) fixedly arranged on the base (1) and the movable mold base (3) slidingly connected on the base (1), the mold base (2) and the movable mold base (3) are provided with cavities, and the two cavities form a die casting cavity (10); Hydraulic cylinder (4), the hydraulic cylinder (4) is fixedly arranged on the base (1) through the first connecting plate (101), the piston rod of the hydraulic cylinder (4) is connected with the movable mold base (3); The transfer mechanism is connected with the movable mold base (3), which is used for transferring the casting in the cavity of the movable mold base (3); Wherein, the movable stroke of the transfer mechanism has a material receiving station opposite the casting in the cavity of the movable mold base (3) and a delivery station for delivering the casting to the side of the mold part; the transfer mechanism includes a driving part (7) arranged on the side of the movable mold base (3), a first lead screw (6) rotatably connected to the driving part (7), a first sleeve (601) threadedly connected with the first lead screw (6), and a material receiving rack (602) arranged on the top of the first sleeve (601); the driving part (7) includes a fixed plate (701) fixedly arranged on the movable mold base (3), a screw rod (702) rotatably connected to the fixed plate (701), a driven gear (703) arranged on the lower side of the screw rod (702), a rack plate (704) fixedly arranged on the outer side of the base (1) and engaged with the driven gear (703), a worm (705) arranged on the screw rod (702), and a worm wheel (706) arranged on the first lead screw (6) and engaged with the worm (705); the driving part (7) further includes a second sleeve (707) threadedly connected with the screw rod (702), the worm (705) is rotatably connected to the second sleeve (707) and slidably arranged with the screw rod (702), the second sleeve (707) is fixedly provided with a side plate (708), and the first lead screw (6) is rotatably connected with the side plate (708); the inner side wall of the worm (705) is fixedly provided with a guide strip (7051), and the outer side wall of the screw rod (702) is provided with a guide groove (7021) matched with the guide strip (7051); the outer side wall of the movable mold base (3) is fixedly provided with a support plate (8), the second lead screw (801) is rotatably connected to the support plate (8), the third sleeve (802) is threadedly connected to the second lead screw (801), the top of the third sleeve (802) and the bottom of the material receiving rack (602) are provided with an expansion rod (803), one end of the material receiving rack (602) away from the expansion rod (803) is rotatably connected with the first sleeve (601) through a pin shaft, the second lead screw (801) is provided with a secondary bevel gear (8011), and the screw rod (702) is provided with a primary bevel gear (7022) engaged with the secondary bevel gear (8011).

2. A casting mechanism according to claim 1, wherein The movable die seat (3) is provided with a groove (5), the movable die seat (5) is slidably connected with a movable plate (501), the movable plate (501) is provided with a first elastic element (502) between the movable plate (501) and the inner wall of the groove (5), the movable plate (501) is fixedly provided with a ejector rod (503) slidably connected in the movable die seat (3) and used for ejecting the casting in the cavity of the movable die seat (3), and the first connecting plate (101) is fixedly provided with a fixed rod (1011) movably abutting against the end of the ejector rod (503).

3. A casting mechanism according to claim 2, wherein The inner side wall of the material receiving frame (602) is fixedly provided with a wear-resistant rubber pad (603), and the bottom of the material receiving frame (602) is provided with a bent plate (6021) movably abutting against the casting.

4. An apparatus for squeeze casting a magnesium alloy casting, comprising a casting mechanism according to claim 3, characterized in that Further comprising a material injection device (9) provided on the upper side of the base (1) through the second connecting plate (102), the discharge port of the material injection device (9) is connected with the material injection port (201) of the fixed die seat (2), and the material injection port (201) and the cavity of the fixed die seat (2) are in communication.

5. A method of using the apparatus for squeeze casting a magnesium alloy casting according to claim 4, characterized by The method comprises the following steps: S1: clamping stage: The hydraulic oil cylinder (4) drives the movable die seat (3) to move towards the fixed die seat (2), so that the cavities of the two die seats are combined to form a die casting cavity (10), and the material receiving frame (602) is horizontally arranged at the side of the fixed die seat (2) and is in standby state; S2: material injection and forming stage: The material injection device (9) injects molten magnesium alloy material into the die casting cavity (10) through the material injection port (201), the mold temperature is kept in the range of 200-300 DEG C, and the magnesium alloy is ensured to be fully filled in the cavity, and the material is cooled to form a casting in the die casting cavity (10); S3: mold opening and material taking stage: The hydraulic oil cylinder (4) is retracted, the piston rod drives the movable die seat (3) to move back, when the movable die seat (3) moves, the driven gear (703) is engaged with the rack plate (704) to drive the screw rod (702) to rotate, the screw rod (702) drives the second sleeve (707) to move up, the first lead screw (6) is rotated through the engagement of the worm (705) and the worm wheel (706), the first sleeve (601) drives the material receiving frame (602) to move axially along the first lead screw (6); At the same time, the main bevel gear (7022) is engaged with the auxiliary bevel gear (8011) to drive the second lead screw (801) to rotate, and the material receiving frame (602) is rotated through the extension rod (803) and is connected with the first sleeve (601) pin shaft; S4: material ejection and receiving stage: The movable die seat (3) continues to move back, the end of the ejector rod (503) abuts against the fixed rod (1011), the ejector rod (503) slides under the force and pushes the casting out of the cavity of the movable die seat (3), at this time, the material receiving frame (602) is horizontally attached to one side of the cavity of the movable die seat (3) and receives the ejected casting; S5: transfer and reset stage The piston rod of the hydraulic oil cylinder (4) is extended again, the movable die seat (3) is combined with the fixed die seat (2), and the material receiving frame (602) is turned over from the material receiving position to the delivery position, so that the casting is transferred to the side of the mold; The mechanism is reset, and the next cycle is prepared.

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