Heat-resistant and wear-resistant extrusion feeding device for casting

Abstract

The invention relates to the technical field of die-casting equipment, and discloses a heat-resistant and wear-resistant casting extrusion feeding device which comprises a base, the base is in an inverted T shape, a first-stage platform and a second-stage platform are arranged on the base from bottom to top, a machine cover is fixedly connected to the side face of the second-stage platform, and a movable die is arranged on one side of the top end of the second-stage platform. A fixing die is arranged on one side of the die body and comprises a second fixing frame, a fixing rod and a fixing plate, the side face of the second fixing frame is fixedly connected with one end of the fixing rod, the other end of the fixing rod is fixedly connected with the side face of the fixing plate, and the side face of the fixing plate is further fixedly connected with a spiral extrusion pump feeding mechanism. One end of the spiral extrusion pump feeding mechanism penetrates through the second fixing frame to be movably connected with a water cooling mechanism, a high-temperature-resistant nickel base alloy material is selected for manufacturing the material storage cavity, a silicon carbide lining is arranged in an inner cavity of the material storage cavity, the base material of the inner cavity is protected, and the strength and creep resistance of the device can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of die-casting equipment, and more particularly to an extrusion feeding device for heat-resistant and wear-resistant casting. Background Art

[0002] Die casting is a metal casting process in which molten metal is injected into a mold cavity under high pressure and forms precision parts after rapid cooling. The extrusion feeding device is a key component in die-casting equipment, mainly responsible for feeding molten metal into the mold cavity during the casting process. It will directly contact molten metals such as aluminum, magnesium, zinc alloys, etc., and the temperature can reach 600 °C or even higher, which will directly affect the device. In addition to the high-temperature effect, the strong erosion caused by the high-speed flow of molten metal under high pressure on the inner wall of the device will also cause wear. Wear will lead to a decline in device accuracy, seal failure, metal liquid leakage, and even affect product quality. The high-temperature and high-friction environment will cause problems such as deformation and excessive wear of the device, resulting in reduced production efficiency and increased maintenance costs.

[0003] Deficiencies of the prior art: Ordinary materials are prone to softening, deformation or failure at high temperatures. In addition, the device is also prone to thermal fatigue cracks during repeated heating and cooling cycles, resulting in structural damage. Summary of the Invention

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides an extrusion feeding device for heat-resistant and wear-resistant casting to solve the problems existing in the above-mentioned background art.

[0005] To achieve the above object, the present invention provides the following technical solution: An extrusion feeding device for heat-resistant and wear-resistant casting, including a base. The base is in a "convex" shape and is provided with a first-level platform and a second-level platform from bottom to top. A machine cover is fixedly connected to the side of the second-level platform. A movable mold is arranged on one side of the top of the second-level platform, and a fixed mold is arranged on the other side. The fixed mold includes a second fixing frame, a fixing rod and a fixing plate. The side of the second fixing frame is fixedly connected to one end of the fixing rod, and the other end of the fixing rod is fixedly connected to the side of the fixing plate. A screw extrusion pumping feeding mechanism is also fixedly connected to the side of the fixing plate. A feeding funnel is fixedly connected to the top of the screw extrusion pumping feeding mechanism. One end of the screw extrusion pumping feeding mechanism passes through the second fixing frame and is movably connected to a water cooling mechanism; The screw extrusion and pumping mechanism includes a storage cavity, an extrusion screw, and a hollow shaft. An inlet is provided at the top of the storage cavity and is fixedly connected to the bottom end of the receiving funnel. Molten metal enters the storage cavity from the receiving funnel through the inlet and is pushed from one end of the inlet to the outlet end by the extrusion screw located inside the storage cavity. The storage cavity is made of a heat-resistant nickel-based alloy material, and a silicon carbide bushing is provided inside the cavity. The extrusion screw has a variable pitch thread, which can reduce the flow resistance of the molten metal during transportation. A silicon carbide coating is provided on the surface of the extrusion screw to reduce the direct contact wear between the metal and the screw surface. A hollow shaft is fixedly inserted inside the extrusion screw, and a hydraulic motor is fixedly connected to one end of the hollow shaft. The hydraulic motor is arranged inside the second fixing frame.

[0006] Furthermore, one end of the storage cavity is fixedly connected to a fixing plate, and a nozzle is provided at the position where the fixing plate contacts the storage cavity. The inner wall of the nozzle is in a smooth streamline shape. A second mold plate is fixedly connected to one side of the fixing plate. Cavity two, injection hole two, and connecting groove two are provided on the side of the second mold plate. A mold block is fixedly connected inside cavity two. One end of injection hole two is connected to the nozzle, and the other end is connected to connecting groove two. Connecting groove two is used to connect the upper and lower cavity two that are symmetric about the midline of the second mold plate.

[0007] Furthermore, the moving mold includes a first fixing frame fixedly connected to the top of the secondary platform of the base. A motor is arranged inside the first fixing frame, and the movement of the moving plate is controlled by controlling the moving rod through the motor. A first mold plate is fixedly connected to the side of the moving plate by screws. Cavity one is provided on the side of the first mold plate. Cavity one is the same in position, shape, and size as cavity two. The two cavity one that are symmetric about the midline of the first mold plate are connected by connecting groove one. Injection hole one communicating with injection hole two is provided in the middle of connecting groove one.

[0008] Furthermore, a round hole is provided inside cavity one, and a ejector rod is arranged inside the round hole. One end of the ejector rod is fixedly connected to a push plate. The push plate is movably connected to the side of the moving rod, and a push rod is fixedly connected to the side of the push plate. The side of the push rod passes through the first fixing frame and is controlled by the motor inside it.

[0009] Furthermore, a partition plate is fixedly connected inside the hollow shaft to separate the incoming water flow and the outgoing water flow. A rotary joint is movably connected to one end of the hollow shaft. Water pipes are fixedly connected to the upper and lower parts of the rotary joint respectively. A radiator is fixedly connected to the bottom end of the water pipe.

[0010] Further, a slide rail frame is fixedly connected to the top end of the hood, and a ground slide rail is fixedly connected to the top end of the first-level platform of the base. The slide rail frame and the ground slide rail are parallel up and down. A movable door is movably connected through a slide bar. An observation window is opened on the side of the movable door, and a transparent glass cover is installed inside the observation window for observing the die-casting and demoulding processes.

[0011] Further, when the movable door moves along the slide rail frame and the ground slide rail towards the fixed mold to complete the extension of the hood, it can block the die-casting occurrence position, increasing the safety of the work site. When the movable door moves along the slide rail frame and the ground slide rail to the outside of the hood, the movable mold is demoulded simultaneously, and the staff can collect the die-casting parts.

[0012] The technical effects and advantages of the present invention: 1. In the present invention, a nickel-based alloy material with high temperature resistance is selected to make the storage cavity, and a silicon carbide bushing is arranged in its inner cavity. This wear-resistant bushing directly bears the erosion of metal flow, protects the inner cavity matrix material, and is beneficial to improving the strength and creep resistance of the device.

[0013] 2. In the present invention, an extrusion screw is provided. The extrusion screw adopts a variable pitch thread, so that the metal is gradually compressed during the conveying process, reducing the shear force and frictional heat, and is beneficial to reducing the flow resistance of the molten metal during the conveying process.

[0014] 3. In the present invention, an extrusion screw is provided, and a silicon carbide coating is arranged on the surface of the extrusion screw, which is beneficial to reducing the direct contact wear between the metal and the screw surface.

[0015] 4. In the present invention, an extrusion screw is provided. A hollow shaft rod is fixedly inserted inside the extrusion screw. One end of the hollow shaft rod is connected to a rotary joint and is connected to an external water cooling mechanism through the rotary joint. The circulating cooling water is pumped into the hollow shaft rod through the rotary joint and circulates in the hollow shaft rod along the channel separated by the partition plate to take away heat. The radiator is responsible for dissipating the heat into the air. The stable temperature control makes the extrusion process smoother, improves the production efficiency and product quality, effectively reduces the working temperature of the screw, avoids material softening or deformation, is beneficial to the improvement of heat resistance, reduces thermal stress and wear, and prolongs the service life of the screw. Brief Description of the Drawings

[0016] Figure 1 is the overall structural schematic diagram of the present invention; Figure 2 is the structural schematic diagram of the movable mold and the fixed mold of the present invention; Figure 3 is the cross-sectional structural schematic diagram of the fixed mold of the present invention; Figure 4 is the structural schematic diagram of the second mold plate of the present invention; Figure 5Schematic structural diagram of mold plate 1 of the present invention; Figure 6 Schematic structural diagram of the extrusion screw of the present invention; Figure 7 Schematic structural diagram of the machine hood of the present invention.

[0017] Reference numerals are: 1, base; 2, machine hood; 201, slide rail frame; 202, moving door; 2021, slide bar; 2022, observation window; 203, ground slide rail; 3, moving mold; 301, fixing frame 1; 302, moving rod; 303, moving plate; 3031, screw; 304, mold plate 1; 305, cavity 1; 3051, connecting groove 1; 3052, injection hole 1; 306, ejector rod; 307, push plate; 308, push rod; 4, fixed mold; 401, fixing frame 2; 402, fixing rod; 403, fixing plate; 4031, nozzle; 404, mold plate 2; 4041, cavity 2; 4042, mold block; 4043, injection hole 2; 405, connecting groove 2; 5, screw extrusion pumping and feeding mechanism; 501, storage cavity; 502, extrusion screw; 503, hollow shaft rod; 504, partition plate; 505, hydraulic motor; 6, receiving funnel; 7, water cooling mechanism; 701, rotary joint; 702, water pipe; 703, radiator. Detailed implementation manners

[0018] Next, the technical solutions in the present invention will be clearly and completely described in conjunction with the drawings in the present invention. In addition, the forms of each structure described in the following embodiments are merely examples. An extrusion feeding device for heat-resistant and wear-resistant casting involved in the present invention is not limited to the structures described in the following embodiments. All other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0019] Referring to Figures 1 to 3 , the present invention provides an extrusion feeding device for heat-resistant and wear-resistant casting, including a base 1. The base 1 is in a "convex" shape and is provided with a first-level platform and a second-level platform from bottom to top. The side of the second-level platform is fixedly connected with a machine hood 2. One side of the top end of the second-level platform is provided with a moving mold 3, and one side is provided with a fixed mold 4. The fixed mold 4 includes a fixing frame 2 401, a fixing rod 402 and a fixing plate 403. The side of the fixing frame 2 401 is fixedly connected with one end of the fixing rod 402, and the other end of the fixing rod 402 is fixedly connected with the side of the fixing plate 403. The side of the fixing plate 403 is also fixedly connected with a screw extrusion pumping and feeding mechanism 5. The top end of the screw extrusion pumping and feeding mechanism 5 is fixedly connected with a receiving funnel 6. One end of the screw extrusion pumping and feeding mechanism 5 passes through the fixing frame 2 401 and is movably connected with a water cooling mechanism 7; The spiral extrusion pumping and feeding mechanism 5 includes a material storage chamber 501, an extrusion screw 502, and a hollow shaft 503. The top of the material storage chamber 501 is provided with a feeding port, which is fixedly connected to the bottom end of the receiving funnel 6. Molten metal enters the material storage chamber 501 from the receiving funnel 6 through the feeding port, and is pushed from one end of the feeding port to the outlet end by the extrusion screw 502 located inside the material storage chamber 501. The material storage chamber 501 is made of a heat-resistant nickel-based alloy material, and a silicon carbide bushing is arranged inside the cavity. This kind of wear-resistant bushing directly bears the erosion of the metal flow, protecting the matrix material of the inner cavity. The extrusion screw 502 adopts a variable pitch thread, which can reduce the flow resistance of the molten metal during the conveying process. Moreover, a silicon carbide coating is arranged on the surface of the extrusion screw 502 to reduce the direct contact wear between the metal and the screw surface. A hollow shaft 503 is fixedly inserted inside the extrusion screw 502, and one end of the hollow shaft 503 is fixedly connected to a hydraulic motor 505, and the hydraulic motor 505 is arranged inside the fixing bracket two 401.

[0020] The extrusion feeding device for casting is mainly used to convey molten metal from the melting furnace to the mold cavity. In this embodiment, the molten metal enters the material storage chamber 501 from the receiving funnel 6, and the hydraulic motor 505 drives the extrusion screw 502 to push the molten metal to the output port and pump it into the mold cavity composed of the moving mold 3 and the fixed mold 4. During this process, the cooling water circulates inside the hollow shaft 503 to control the temperature below 300 °C. The silicon carbide coating arranged on the surface of the extrusion screw 502 reduces the friction between the metal and the screw surface. After the molten metal fully fills the cavity and solidifies, the moving mold 3 and the fixed mold 4 are separated, and we can obtain the casting.

[0021] Refer to Figures 2 to 5 , wherein, one end of the material storage chamber 501 is fixedly connected to the fixing plate 403, and the fixing plate 403 is provided with a nozzle 4031 at the position in contact with the material storage chamber 501. The inner wall of the nozzle 4031 is smooth and streamlined, which can reduce the local retention and local overheating of the molten metal. One side of the fixing plate 403 is fixedly connected to the second mold plate 404. The side surface of the second mold plate 404 is provided with a second cavity 4041, an injection hole 4043, and a connecting groove 405. A mold block 4042 is fixedly connected inside the second cavity 4041. One end of the injection hole 4043 is communicated with the nozzle 4031, and the other end is communicated with the connecting groove 405. The connecting groove 405 is used to connect the upper and lower second cavities 4041 that are symmetric about the center line of the second mold plate 404.

[0022] The molten metal is pushed and pumped from the material storage chamber 501 by the extrusion screw 502 to the nozzle 4031, then enters the connecting groove 405 through the injection hole 4043, and further enters the upper and lower second cavities 4041 that are symmetric about the center line of the second mold plate 404.

[0023] Among them, the moving mold 3 includes a first fixing frame 301 fixedly connected to the top end of the secondary platform of the base 1. A motor is arranged inside the first fixing frame 301, and the movement of the moving plate 303 is controlled by controlling the moving rod 302 through the motor. One side of the moving plate 303 is fixedly connected to a first mold plate 304 by screws 3031. A first cavity 305 is formed on one side of the first mold plate 304. The first cavity 305 is the same as the second cavity 4041 in terms of position, shape, and size. The two first cavities 305 symmetric about the center line of the first mold plate 304 are communicated through a first connecting groove 3051. A first injection hole 3052 communicated with the second injection hole 4043 is formed in the middle of the first connecting groove 3051.

[0024] The moving plate 303 of the moving mold 3 moves towards the fixed plate 403 of the fixed mold 4 until the mold plates of the two are closed, that is, a complete mold cavity is formed. The specific implementation process of this action is as follows: The motor inside the first fixing frame 301 drives the moving rod 302 to move towards the fixed plate 403, so that the first mold plate 304 is aligned with the second mold plate 404, and the cavities formed on their opposite sides are closed and pressed tightly.

[0025] Among them, a round hole is formed inside the first cavity 305, and a ejector rod 306 is arranged in the round hole. One end of the ejector rod 306 is fixedly connected to a push plate 307. The push plate 307 is movably connected to the side of the moving rod 302, and a push rod 308 is fixedly connected to the side of the push plate 307. The side of the push rod 308 passes through the first fixing frame 301 and is controlled by the motor inside it.

[0026] After the molten metal liquid fully fills the cavity and solidifies, the casting needs to be taken out. To complete this action, the mold plates of the moving mold 3 need to be separated from the mold plates of the fixed mold 4, and the casting is pushed out of the cavity by the ejector rod 306. The specific implementation method of this process is as follows: The motor inside the first fixing frame 301 synchronously drives the moving rod 302 and the push rod 308 to control the first mold plate 304 to move away from the second mold plate 404. After the two are separated and have a certain distance, the motor drives the push rod 308 to move towards the second mold plate 404. The push rod 308 pushes the push plate 307 to move, and the push plate 307 pushes the moving rod 302 to push the casting out of the cavity of the first mold plate 304.

[0027] Refer to Figures 3 to 6 As shown in [reference number], a partition plate 504 is fixedly connected inside the hollow shaft rod 503 for separating the incoming water flow and the outgoing water flow. One end of the hollow shaft rod 503 is movably connected to a rotary joint 701. The upper and lower parts of the rotary joint 701 are respectively fixedly connected to a water delivery pipe 702. The bottom end of the water delivery pipe 702 is fixedly connected to a radiator 703.

[0028] A cooling channel, i.e., a hollow shaft rod 503, is embedded inside the extrusion screw 502. One end of the hollow shaft rod 503 is connected to a rotary joint 701, and through the rotary joint 701, it is connected to an external water cooling mechanism 7, i.e., a water delivery pipe 702 and a radiator 703. The radiator 703 is responsible for dissipating heat into the air. The circulating cooling water is pumped into the hollow shaft rod 503 through the rotary joint 701 and circulates inside the hollow shaft rod 503 along the channels separated by the partition plate 504, taking away the heat, avoiding overheating of the screw, reducing the equipment temperature, and enabling the equipment to operate stably in a high-temperature environment.

[0029] Refer to Figure 7 , a slide rail frame 201 is fixedly connected to the top end of the hood 2, and a ground slide rail 203 is fixedly connected to the top end of the first-level platform of the base 1. The slide rail frame 201 and the ground slide rail 203 are parallel up and down. A moving door 202 is movably connected through a slide bar 2021. An observation window 2022 is opened on the side of the moving door 202, and a transparent glass cover is installed inside the observation window 2022 for observing the die-casting and demoulding processes.

[0030] Among them, when the moving door 202 moves along the slide rail frame 201 and the ground slide rail 203 towards the fixed mold 4 to complete the extension of the hood 2, it can block the position where die-casting occurs, increasing the safety of the work site. When the moving door 202 moves along the slide rail frame 201 and the ground slide rail 203 to the outside of the hood 2, the moving mold 3 simultaneously demoulds, and the staff can collect the die-castings.

[0031] The working principle of the present invention: The metal is heated to a molten state in the melting furnace. After reaching the predetermined temperature, the molten metal enters the receiving funnel 6 through the material trough, and then enters the storage cavity 501. The hydraulic motor 505 drives the extrusion screw 502 to push the molten metal to the nozzle 4031. The moving plate 303 of the moving mold 3 moves towards the fixed plate 403 of the fixed mold 4 until the mold plates of the two are closed, that is, a complete mold cavity is formed. The injection hole one 3052 and the injection hole two 4043 are communicated with the nozzle 4031. The molten metal liquid is pushed and pumped from the storage cavity 501 by the extrusion screw 502, and enters the cavity along the nozzle 4031, the injection hole two 4043, the injection hole one 3052, and the connecting groove to fill the cavity. After the molten metal liquid fully fills the cavity and solidifies, the internal motor of the fixed frame one 301 synchronously drives the moving rod 302 and the push rod 308 to control the mold plate one 304 to move away from the mold plate two 404. After the two are separated and have a certain gap, the motor drives the push rod 308 to move towards the mold plate two 404. The push rod 308 pushes the push plate 307 to move, and the push plate 307 pushes the moving rod 302 to push the casting out of the cavity of the mold plate one 304. Thus, the casting can be obtained.

[0032] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. An extrusion feeding device for heat-resistant and wear-resistant casting, comprising a base (1), characterized in that: The base (1) is in a "convex" shape, and is provided with a primary and secondary platform from bottom to top, wherein the side of the secondary platform is fixedly connected to the hood (2), a movable mold (3) is provided on one side of the top of the secondary platform, and a fixed mold (4) is provided on one side, wherein the fixed mold (4) comprises a second fixing frame (401), a fixing rod (402) and a fixing plate (403), wherein the side of the second fixing frame (401) is fixedly connected to one end of the fixing rod (402), and the other end of the fixing rod (402) is fixedly connected to the side of the fixing plate (403), and the side of the fixing plate (403) is also fixedly connected to a spiral extrusion pump feeding mechanism (5), and the top of the spiral extrusion pump feeding mechanism (5) is fixedly connected to a material receiving funnel (6), and one end of the spiral extrusion pump feeding mechanism (5) passes through the second fixing frame (401) and is movably connected to a water cooling mechanism (7); The spiral extrusion pump feeding mechanism (5) comprises a material storage chamber (501), an extrusion screw (502) and a hollow shaft (503). The top of the material storage chamber (501) is provided with a feed port, which is fixedly connected to the bottom of the material receiving funnel (6). Molten metal enters the material storage chamber (501) through the feed port from the material receiving funnel (6) and is pushed from one end of the feed port to the outlet end by the extrusion screw (502) located inside the material storage chamber (501). The material storage chamber (501) is made of a high-temperature resistant nickel-based alloy material. The cavity is provided with a silicon carbide bushing, and the extrusion screw (502) adopts a variable pitch thread, which can reduce the flow resistance of the molten metal during the conveying process, and the surface of the extrusion screw (502) is provided with a silicon carbide coating to reduce the direct contact wear between the metal and the screw surface. A hollow shaft (503) is fixedly inserted inside the extrusion screw (502), and one end of the hollow shaft (503) is fixedly connected to a hydraulic motor (505), and the hydraulic motor (505) is arranged inside the second fixed frame (401).

2. The extrusion feeding device for heat-resistant and wear-resistant casting according to claim 1, characterized in that: One end of the material storage cavity (501) is fixedly connected to the fixed plate (403), and the fixed plate (403) is provided with a nozzle (4031) at a position in contact with the material storage cavity (501), the inner wall of the nozzle (4031) is smooth and streamlined, one side of the fixed plate (403) is fixedly connected to the second mold plate (404), and the side of the second mold plate (404) is provided with a second mold cavity (4041), a second injection hole (4043) and a second connecting groove (405), wherein the interior of the second mold cavity (4041) is fixedly connected to a mold block (4042), one end of the second injection hole (4043) is connected to the nozzle (4031), and the other end is connected to the second connecting groove (405), and the second connecting groove (405) is used to connect two upper and lower mold cavities (4041) symmetrical about the center line of the second mold plate (404).

3. The extrusion feeding device for heat-resistant and wear-resistant casting according to claim 1, characterized in that: The movable mold (3) comprises a fixing frame 1 (301) fixedly connected to the top of the secondary platform of the base (1); a motor is arranged inside the fixing frame 1 (301), and the movement of the movable plate (303) is controlled by the motor controlling the movable rod (302); a mold plate 1 (304) is fixedly connected to the side of the movable plate (303) via a screw (3031); a mold cavity 1 (305) is provided on the side of the mold plate 1 (304); the mold cavity 1 (305) and the mold cavity 2 (4041) are consistent in position, shape and size; the two mold cavities 1 (305) symmetrical about the center line of the mold plate 1 (304) are connected via a connecting groove 1 (3051); an injection hole 1 (3052) connected to the injection hole 2 (4043) is provided in the middle of the connecting groove 1 (3051).

4. The extrusion feeding device for heat-resistant and wear-resistant casting according to claim 3, characterized in that: A circular hole is provided inside the mold cavity 1 (305), and a push rod (306) is arranged in the circular hole. One end of the push rod (306) is fixedly connected to a push plate (307), and the push plate (307) is movably connected to the side of the moving rod (302). The side of the push plate (307) is fixedly connected to a push rod (308), and the side of the push rod (308) passes through the fixed frame 1 (301) and is controlled by the internal motor thereof.

5. The extrusion feeding device for heat-resistant and wear-resistant casting according to claim 1, characterized in that: A partition plate (504) is fixedly connected inside the hollow shaft (503) for separating an inlet water flow from an outlet water flow. A rotary joint (701) is movably connected to one end of the hollow shaft (503). A water pipe (702) is fixedly connected to the upper and lower parts of the rotary joint (701) respectively. The bottom end of the water pipe (702) is fixedly connected to a radiator (703).

6. The extrusion feeding device for heat-resistant and wear-resistant casting according to claim 1, characterized in that: The top of the hood (2) is fixedly connected to a slide rail frame (201), the top of the primary platform of the base (1) is fixedly connected to a floor slide rail (203), the slide rail frame (201) and the floor slide rail (203) are vertically parallel, and are movably connected to a movable door (202) via a slide bar (2021), an observation window (2022) is provided on the side of the movable door (202), and a transparent glass cover is installed inside the observation window (222) for observing the die-casting and demoulding process.

7. The extrusion feeding device for heat-resistant and wear-resistant casting according to claim 6, characterized in that: When the movable door (202) moves along the slide rail frame (201) and the floor slide rail (203) toward the fixed mold (4) to complete the extension of the hood (2), the die-casting location can be shielded to increase the safety of the work site; when the movable door (202) moves along the slide rail frame (201) and the floor slide rail (203) to the outside of the hood (2), the movable mold (3) is demoulded at the same time, and the staff can collect the die-casting parts.

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