Magnesium alloy shell demolding device

Abstract

The invention provides a magnesium alloy shell demolding device and belongs to the technical field of magnesium alloy shell demolding, the magnesium alloy shell demolding device comprises a machine body and a die-casting mechanism arranged on the machine body, the die-casting mechanism comprises a fixed die arranged at one end of an inner cavity of the machine body, and guide rods are arranged between the four corners of the inner side face of the fixed die and the inner wall of the machine body; a movable mold matched with the fixed mold in a mold closing manner is connected among the four guide rods in a sliding manner; the fixed mold and the movable mold are each provided with a demolding assembly, each demolding assembly comprises sliding holes formed in the two ends of the fixed mold and the two ends of the movable mold in the length direction respectively, an ejector rod is slidably connected into each sliding hole, and the fixed mold and the movable mold are each provided with a synchronous driving assembly used for synchronously driving the ejector rods to move in the axial direction of the corresponding sliding hole. The demolding, spraying and cleaning functions are integrated in the ejector rod structure, the integrated operation process of demolding, spraying and mold cleaning is achieved, and the tedious design that an independent spraying mechanism and a complex movement control system need to be additionally arranged after demolding in the traditional technology is abandoned.

Description

Technical Field

[0001] This invention belongs to the field of magnesium alloy shell demolding technology, and specifically relates to a magnesium alloy shell demolding device. Background Technology

[0002] Magnesium alloy shells are widely used in aerospace, automotive manufacturing and 3C electronics due to their lightweight, high strength, good thermal conductivity and electromagnetic shielding performance. They have become the preferred material for high-performance structural components. Die casting is a key process for achieving efficient mass production of magnesium alloy shells, so a special magnesium alloy shell demolding device is required. For example, a die-casting mold demolding device disclosed in CN120268979A includes a die-casting machine tool and an injection mechanism. The above technical solution is provided with a demolding ejector pin, an expansion component, a hydraulic component, a fixing component, and a connecting groove. When the moving mold is driven to move to one side by a hydraulic cylinder for demolding, the expansion component is deflected and contracted due to the inner diameter restriction of the passive mold and the positioning component until one side of the expansion component contacts one side surface of the die-casting part inside the moving mold. This causes the expansion component to release the restriction and contract, so that the air pressure inside the expansion component can be released and deflected back. Since one side of the hydraulic component is squeezed, the hydraulic oil in the inner cavity is introduced into the fixed component through the connecting groove, so that the end movement blocks and fixes the other side of the expansion component. Finally, the expansion component will increase the end area of ​​the demolding ejector pin, increase the force surface and avoid scratches. Moreover, the extensibility of the expansion component can meet the demolding needs of various types of molds. The aforementioned magnesium alloy die-casting mold uses an independent ejection mechanism to complete demolding. After demolding, an external spraying system is needed to spray a release agent, and manual or pneumatic methods are required to clean the mold cavity residue. The process is fragmented and relies on multiple sets of equipment to work together, which limits the degree of automation and results in a long production cycle. Summary of the Invention

[0003] In view of this, the present invention provides a magnesium alloy shell demolding device, which integrates demolding, spraying and cleaning functions into the ejector rod structure, realizing an integrated operation process of demolding, spraying and cleaning. It eliminates the cumbersome design of traditional processes that require additional independent spraying mechanism and complex motion control system after demolding, significantly improving the compactness and automation level of the equipment. It can actively clean the mold cavity with the help of fluid impact force, effectively avoiding product defects caused by residue adhesion, extending the service life of the mold, and greatly improving the production cycle and overall processing efficiency.

[0004] To solve the above technical problems, the present invention provides a magnesium alloy shell demolding device, including a body and a die-casting mechanism disposed thereon. The die-casting mechanism includes a fixed mold disposed at one end of the inner cavity of the body. Guide rods are provided between the four corners of the inner side of the fixed mold and the inner wall of the body. A movable mold adapted to the mold closing of the fixed mold is slidably connected between the four guide rods. Both the fixed mold and the moving mold are equipped with demolding components. Each demolding component includes sliding holes at both ends of the fixed mold and the moving mold along their length. An ejector rod is slidably connected within each sliding hole. The fixed mold and the moving mold are equipped with synchronous drive components for synchronously driving the ejector rods to move axially along the sliding holes. The inner ends of the ejector rods mate with the inner walls of the cavities of the fixed mold and the moving mold, respectively. Each ejector rod has a guide channel for conveying the release agent at its axis. The outer arc surface of the inner end of the ejector rod has several outlets communicating with adjacent guide channels. The fixed mold and the moving mold are also equipped with components for driving the ejector rods to retract... The in-situ reset component integrates demolding, spraying, and cleaning functions into the ejector pin structure, realizing an integrated operation process for demolding, spraying, and mold cleaning. This eliminates the cumbersome design of traditional processes that require additional independent spraying mechanisms and complex motion control systems after demolding, significantly improving the compactness and automation level of the equipment. At the same time, the in-situ dynamic spraying method improves the utilization rate and coating uniformity of the release agent, and actively cleans the mold cavity with the help of fluid impact force, effectively avoiding product defects caused by residue adhesion, extending the mold life, and greatly improving production cycle and overall processing efficiency.

[0005] The inner ends of the ejector pins are all tapered, and the end face of the tapered structure fits against the inner wall of the mold cavity. Several liquid outlets on the inner end of each ejector pin form a group. Each group of liquid outlets is evenly distributed circumferentially and axially along the tapered surface of the ejector pin, thus ensuring the uniformity and comprehensiveness of the spraying.

[0006] The demolding assembly also includes fixed seats respectively set on the opposite outer sides of the fixed mold and the moving mold near each ejector pin. The middle of each fixed seat is provided with a through hole adapted to the ejector pin. The outer end of each ejector pin is rotatably connected to a circular plate. The outer side of each fixed seat is provided with several circular rods. Several circular rods located on the same fixed seat form a group. Each group of circular rods is slidably connected to the corresponding circular holes on the adjacent circular plates on the same side. A spring is provided between each circular plate and the adjacent fixed seat on the same side, which plays the role of elastic reset.

[0007] The synchronous drive assembly includes fixed plates symmetrically arranged at both ends of the fixed mold and the moving mold. A double-headed worm gear is rotatably connected between the two fixed plates on the fixed mold and between the two fixed plates on the moving mold. A worm wheel is rotatably connected to each ejector rod on the opposite outer side of the fixed mold and the moving mold. The two ends of the double-headed worm gear are respectively engaged with the adjacent worm wheel on the same side. The worm wheels are movably connected to the adjacent ejector rod on the same side through connecting parts, thus playing the role of synchronous and rapid drive.

[0008] The connecting parts include bosses respectively set on the inner arc surface of the worm gear, and the outer arc surface of the push rod is provided with grooves that slide and connect with the bosses, thus playing the role of rapid transmission.

[0009] The synchronous drive assembly also includes rotating rods that are rotatably connected to the inner end fixed plates of the fixed mold and the moving mold, respectively. The two rotating rods are slidably connected. Each rotating rod has a bevel gear one at its outer end and a bevel gear two at the end of the double-headed worm gear near the rotating rod. The bevel gear two meshes with the adjacent bevel gear one on the same side. The inner cavity of the machine body has a motor, which is fixedly connected to one end of the rotating rod, thus playing the role of synchronous transmission.

[0010] The inner end of the rotating rod on the fixed mold is provided with a rectangular rod, and the inner end of the rotating rod on the moving mold is provided with a rectangular groove that slides in connection with the rectangular rod, thus ensuring the continuity of transmission.

[0011] The reset component includes a U-shaped plate that is slidably connected to the outside of the fixed mold and the moving mold respectively. The outer end of the ejector rod is rotatably connected to the corresponding rotating hole on the adjacent U-shaped plate on the same side. The slots on the inner end of the U-shaped plate are slidably connected to sliding plates. A spring is provided between the sliding plate and the slot, which plays an adaptive role.

[0012] The die-casting mechanism also includes a hydraulic cylinder located in the inner cavity of the machine body near the moving mold. The telescopic end of the hydraulic cylinder is fixedly connected to the moving mold. An injection machine is provided at the end of the machine body near the fixed mold. The discharge port of the injection machine is connected to the feed port of the fixed mold, which serves to automatically reset the die.

[0013] The beneficial effects of the above-described technical solution of the present invention are as follows: During mold opening, the hydraulic cylinder reverses its action, driving the moving mold to retreat along the guide rod. At this time, due to the separation of the moving and fixed molds, firstly, under the action of the elastic potential energy stored in spring two, the sliding plate extends outward. When the preload released by spring two is less than the rebound force of spring one, spring one dominates the reset process, pulling the circular plate to slide inward along the circular rod, thereby driving the ejector rod to extend synchronously from the sliding hole, achieving uniform ejection of the formed magnesium alloy shell, completing the demolding action. The ejected workpiece is received by the external robotic arm and moved out of the machine body. Then, the ejector rod is driven to rotate by the synchronous drive assembly. In this state, the external liquid supply system delivers the release agent to the guide channel at the center of the ejector rod shaft, and through its internal... The liquid outlets, evenly distributed circumferentially and axially, on the tapered surface of the side end spray onto the mold cavity surface, achieving simultaneous rotation and spraying to ensure comprehensive and thorough coverage of the release agent. This process not only automatically sprays the release agent but also effectively removes residual impurities and carbon deposits from the mold cavity using the flushing effect of the liquid jet, preventing residue buildup from affecting the surface quality and dimensional accuracy of subsequent castings. By integrating demolding, spraying, and cleaning functions into the ejector structure, an integrated operation process for demolding, spraying, and cleaning is achieved. This eliminates the cumbersome design of traditional processes that require an additional independent spraying mechanism and complex motion control system after demolding, significantly improving the compactness and automation level of the equipment.

[0014] When the motor starts, it drives the two rotating rods to rotate. Through the meshing transmission of bevel gear one and bevel gear two, the double-headed worm gear is driven to rotate synchronously. The double-headed worm gear further drives the worm wheels on both sides to rotate. The boss on the inner arc surface of the worm wheel and the groove on the outer wall of the push rod form a sliding fit, which converts the rotational motion into the circumferential rotation of the push rod, thereby realizing the synchronous and uniform rotation of the push rod and ensuring the uniformity and comprehensiveness of the liquid spray.

[0015] During the mold closing stage, the hydraulic cylinder drives the moving mold to slide along the guide rod towards the fixed mold, achieving precise alignment and closure. During this process, the sliding plates on the fixed mold and the moving mold gradually come into contact and interact. As the mold closing force is continuously applied, the second spring in the reset component is compressed and stores energy. When the preload generated by the second spring exceeds the initial elastic force of the first spring, the U-shaped plate drives the circular plate and ejector rod connected to it to move outward as a whole. At this time, the boss on the inner arc surface of the worm gear slides in the groove on the outer wall of the ejector rod, while the circular plate slides synchronously along the circular rod on the fixed seat, ensuring smooth and reliable movement. When the moving mold and the fixed mold are completely closed, the end face of the ejector rod is flush with the inner wall of the mold cavity, and the sliding hole is sealed and closed, thus ensuring the integrity of the mold cavity structure. At the same time, the second spring maintains a certain preload to ensure that the ejector rod will not undergo axial displacement during high-pressure die casting, maintaining sealing stability. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the main structure of a magnesium alloy shell demolding device according to the present invention; Figure 2 This is a partial cross-sectional view of the present invention; Figure 3 This is a cross-sectional structural diagram of the present invention; Figure 4 This is a schematic diagram of the planar structure of the present invention; Figure 5 This is an enlarged structural diagram of point A in the present invention; Figure 6 This is an enlarged structural diagram of point B in the present invention; Figure 7 This is an enlarged structural diagram of point C in the present invention; Figure 8 This is an enlarged structural diagram of point D in the present invention; Figure 9 This is an enlarged structural diagram of point E in the present invention.

[0017] Explanation of reference numerals in the attached drawings: 100, machine body; 200, fixed mold; 201, guide rod; 202, moving mold; 203, hydraulic cylinder; 204, injection machine; 300, sliding hole; 301, ejector rod; 302, guide channel; 303, liquid outlet; 304, fixed base; 305, circular plate; 306, circular rod; 307, spring one; 400, fixed plate; 401, double-headed worm gear; 402, worm wheel; 403, boss; 404, groove; 405, rotating rod; 406, bevel gear one; 407, bevel gear two; 408, motor; 500, U-shaped plate; 501, sliding plate; 502, spring two. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will be described in conjunction with the accompanying drawings of the embodiments of the present invention. Figure 1-9 The technical solutions of the embodiments of the present invention will be clearly and completely described herein. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the described embodiments of the present invention are within the scope of protection of the present invention.

[0019] This embodiment provides a magnesium alloy shell demolding device, such as... Figure 1-9 As shown: The device includes a body 100 and a die-casting mechanism mounted thereon. The die-casting mechanism includes a fixed mold 200 located at one end of the inner cavity of the body 100. Guide rods 201 are provided between the four corners of the inner side of the fixed mold 200 and the inner wall of the body 100. The four guide rods 201 are diagonally symmetrically distributed. A movable mold 202 adapted to the mold closing of the fixed mold 200 is slidably connected between the four guide rods 201. The die-casting mechanism also includes a hydraulic cylinder 203 located at the end of the inner cavity of the body 100 near the movable mold 202. The telescopic end of the hydraulic cylinder 203 is fixedly connected to the movable mold 202 and is used to drive the movable mold 202 to reciprocate along the guide rods 201 to realize the mold opening and closing actions. An injection machine 204 is provided at the end of the body 100 near the fixed mold 200. The discharge port of the injection machine 204 is connected to the inlet of the fixed mold 200 and is used to inject molten magnesium alloy into the mold cavity. Both the fixed mold 200 and the moving mold 202 are equipped with demolding components. Each demolding component includes sliding holes 300 respectively opened at both ends of the fixed mold 200 and the moving mold 202 along their length. A push rod 301 is slidably connected within each sliding hole 300. The push rod 301 can both rotate and slide within the sliding hole 300. The fixed mold 200 and the moving mold 202 are equipped with synchronous driving components for synchronously driving the push rod 301 to move axially along the sliding hole 300. The inner ends of the push rod 301 are respectively matched with the inner walls of the mold cavities of the fixed mold 200 and the moving mold 202. To ensure the continuous integrity of the mold cavity surface in the closed state, each ejector pin 301 has a guide channel 302 for conveying the release agent at its axis. The outer end of the guide channel 302 is connected to the external liquid supply end. Each inner end of the ejector pin 301 has several liquid outlets 303 connected to adjacent guide channels 302 on its outer arc surface. Both the fixed mold 200 and the moving mold 202 are also equipped with reset components for driving the ejector pin 301 to reset. The inner end of the ejector pin 301 is tapered, and the end face of the tapered structure fits against the inner wall of the mold cavity. The inner side of the sliding hole 300... The end is provided with a conical placement groove adapted to the conical structure. Several liquid outlets 303 on the inner end of each ejector rod 301 form a group. Each group of liquid outlets 303 is evenly distributed circumferentially and axially along the conical surface of its respective ejector rod 301. The liquid outlets 303 are evenly arranged along the circumferential and axial directions of the conical surface to form a spraying unit, ensuring comprehensive spray coverage without dead corners. The demolding assembly also includes fixed seats 304 respectively set on the opposite outer sides of the fixed mold 200 and the moving mold 202 near each ejector rod 301. The middle of the fixed seats 304 is A through hole adapted to the ejector pin 301 is provided. The outer end of the ejector pin 301 is rotatably connected to a circular plate 305. The outer side of the fixed seat 304 is provided with several circular rods 306. Several circular rods 306 located on the same fixed seat 304 form a group. Each group of circular rods 306 is slidably connected to the corresponding circular holes on the adjacent circular plate 305 on the same side. A spring 307 is provided between the circular plate 305 and the adjacent fixed seat 304 on the same side to provide a reset pull force so that the ejector pin 301 can retract to the initial position after demolding.

[0020] During the mold closing stage, hydraulic cylinder 203 drives the moving mold 202 to slide along guide rod 201 towards the fixed mold 200, achieving precise alignment and closure. During this process, the reset component moves the connected circular plate 305 and ejector pin 301 outwards as a whole. Once the moving mold 202 and fixed mold 200 are fully closed, the end face of ejector pin 301 is flush with the inner wall of the mold cavity, and the opening of the sliding hole 300 is sealed, thus ensuring the integrity of the mold cavity structure. Subsequently, the injection molding machine 204 injects molten magnesium alloy through the inlet of the fixed mold 200 into the mold 200. In the closed mold cavity formed by the end faces of the moving mold 202 and the ejector pin 301, after the casting has fully cooled and solidified, the mold opening stage begins. During mold opening, the hydraulic cylinder 203 reverses its movement, driving the moving mold 202 to retract along the guide rod 201. At this time, due to the separation of the moving and fixed molds, the reset component pulls the circular plate 305 to slide inward along the circular rod 306, thereby driving the ejector pin 301 to extend synchronously from the sliding hole 300, achieving uniform ejection of the formed magnesium alloy shell and completing the demolding action. The ejected workpiece is received by the external robotic arm and moved out of the machine body 100. Subsequently, The synchronous drive assembly drives the ejector rod 301 to rotate circumferentially. In this state, the external liquid supply system delivers the release agent to the guide channel 302 at the axis of the ejector rod 301, and sprays it onto the mold cavity surface through the outlets 303 evenly distributed circumferentially and axially on the conical surface of its inner end. This achieves simultaneous rotation and spraying, ensuring comprehensive and thorough coverage of the release agent. This process not only completes the automatic spraying of the release agent but also effectively removes residual impurities and carbon deposits in the mold cavity using the flushing effect of the liquid jet, preventing residue accumulation from affecting the surface quality and dimensional accuracy of subsequent castings. The mold-making, spraying, and cleaning functions are integrated into the ejector pin 301 structure, realizing an integrated operation process of demolding, spraying, and mold cleaning. This eliminates the cumbersome design of traditional processes that require additional independent spraying mechanisms and complex motion control systems after demolding, significantly improving the compactness and automation level of the equipment. At the same time, the in-situ dynamic spraying method improves the utilization rate of the release agent and the uniformity of coating, and actively cleans the mold cavity with the help of fluid impact force, effectively avoiding product defects caused by residue adhesion, extending the service life of the mold, and greatly improving the production cycle and overall processing efficiency.

[0021] like Figure 2-8As shown, the synchronous drive assembly includes fixed plates 400 symmetrically arranged at both ends of the fixed mold 200 and the moving mold 202. A double-headed worm gear 401 is rotatably connected between the two fixed plates 400 on the fixed mold 200 and between the two fixed plates 400 on the moving mold 202. The double-headed worm gear 401 is a whole composed of a central rod and symmetrically distributed helical teeth at both ends. A worm wheel 402 is rotatably connected to the opposite outer surfaces of the fixed mold 200 and the moving mold 202 near each ejector rod 301. Each worm wheel 402 has a through hole in its center that connects to the ejector rod 301. Both ends of the double-headed worm gear 401 are meshed with adjacent worm wheels 402 on the same side. Each worm wheel 402 is movably connected to adjacent ejector rods 301 on the same side via a connecting member. The connecting member includes bosses 403 respectively provided on the inner arc surface of the worm wheel 402, and grooves 404 slidably connected to the bosses 403 on the outer arc surface of the ejector rod 301.

[0022] When the double-headed worm gear 401 rotates, it drives the two worm wheels 402 to rotate. The boss 403 on the inner arc surface of the worm wheel 402 and the groove 404 on the outer wall of the push rod 301 form a sliding fit, which converts the rotational motion into the circumferential rotation of the push rod 301, thus playing the role of synchronously driving the rotation.

[0023] like Figure 2-8 As shown, the synchronous drive assembly also includes a rotating rod 405 rotatably connected to the inner end fixing plate 400 of the fixed mold 200 and the moving mold 202, respectively. The two rotating rods 405 are slidably connected. The outer end of each rotating rod 405 is provided with a bevel gear 406. The end of the double-headed worm gear 401 near the rotating rod 405 is provided with a bevel gear 407. The bevel gear 407 meshes with the adjacent bevel gear 406 on the same side. The inner cavity of the machine body 100 is provided with a motor 408. The motor 408 is fixedly connected to one end of the rotating rod 405. The inner end of the rotating rod 405 on the fixed mold 200 is provided with a rectangular rod. The inner end of the rotating rod 405 on the moving mold 202 is provided with a rectangular groove that is slidably connected to the rectangular rod. During the opening and closing of the mold, the two rotating rods 405 slide relative to each other to ensure that the transmission is not interrupted.

[0024] When the motor 408 starts, it drives the two rotating rods 405 to rotate. Through the meshing transmission of bevel gear 1 406 and bevel gear 2 407, it drives the double-headed worm gear 401 to rotate synchronously, and finally drives all the push rods 301 to rotate around their own axis.

[0025] like Figure 2-9 As shown, the reset component includes a U-shaped plate 500 that is slidably connected to the outside of the fixed mold 200 and the moving mold 202 respectively. The outer end of the push rod 301 is rotatably connected to the corresponding rotating hole on the adjacent U-shaped plate 500 on the same side. Sliding plates 501 are slidably connected in the slots provided on the inner end of the U-shaped plate 500. Springs 502 are provided between the sliding plate 501 and the slot.

[0026] During the mold closing process, the sliding plates 501 on the fixed mold 200 and the moving mold 202 gradually come into contact and interact. As the mold closing force is continuously applied, the second spring 502 in the reset component is compressed and stores energy. When the preload generated by the second spring 502 exceeds the initial elastic force of the first spring 307, the U-shaped plate 500 drives the circular plate 305 and the ejector rod 301 connected to it to move outward as a whole. When the mold opens, the hydraulic cylinder 203 moves in the opposite direction, driving the moving mold 202 to retreat along the guide rod 201. At this time, due to the separation of the moving and fixed molds, firstly, under the action of the elastic potential energy stored in the second spring 502, the sliding plate 501 extends outward. When the preload released by the second spring 502 is less than the rebound force of the first spring 307, the first spring 307 dominates the reset process, pulling the circular plate 305 to slide inward along the circular rod 306, thereby driving the ejector rod 301 to extend outward from the sliding hole 300 simultaneously.

[0027] The working principle of the magnesium alloy shell demolding device provided by the present invention is as follows: During the mold closing stage, the hydraulic cylinder 203 drives the moving mold 202 to slide along the guide rod 201 towards the fixed mold 200, achieving precise alignment and closing. During this process, the sliding plates 501 on the fixed mold 200 and the moving mold 202 gradually come into contact and interact. As the mold closing force is continuously applied, the second spring 502 in the reset component is compressed and stores energy. When the preload generated by the second spring 502 exceeds the initial elastic force of the first spring 307, the U-shaped plate 500 drives the circular plate 305 and the ejector rod 301 connected to it to move outward as a whole. At this time, the boss 403 on the inner arc surface of the worm gear 402 slides in the groove 404 on the outer wall of the ejector rod 301, and at the same time, the circular plate... 305 slides synchronously along the circular rod 306 on the fixed seat 304 to ensure smooth and reliable movement. When the moving mold 202 and the fixed mold 200 are completely closed, the end face of the ejector rod 301 is flush with the inner wall of the mold cavity, and the opening of the sliding hole 300 is sealed, thus ensuring the integrity of the mold cavity structure. At the same time, the spring 502 maintains a certain preload to ensure that the ejector rod 301 will not undergo axial displacement during the high-pressure die casting process, maintaining sealing stability. Subsequently, the injection machine 204 injects molten magnesium alloy through the feed port of the fixed mold 200 into the closed mold cavity formed by the fixed mold 200, the moving mold 202, and the end face of the ejector rod 301. After the casting has fully cooled and solidified, it enters the mold opening stage. When the mold opens, the hydraulic cylinder 203 moves in the opposite direction, driving the moving mold 202. Retracting along guide rod 201, at this time, due to the separation of the moving and fixed molds, firstly, under the action of the elastic potential energy stored in spring 2 502, sliding plate 501 extends outward. When the preload released by spring 2 502 is less than the rebound force of spring 1 307, spring 1 307 dominates the reset process, pulling circular plate 305 to slide inward along circular rod 306, thereby driving ejector rod 301 to extend synchronously from sliding hole 300, realizing uniform ejection of the formed magnesium alloy shell, completing the demolding action. The ejected workpiece is received by external robotic arm and moved out of machine body 100. Subsequently, motor 408 starts, driving two rotating rods 405 to rotate. Through the meshing transmission of bevel gear 1 406 and bevel gear 2 407, the double-headed worm gear 401 is driven to rotate synchronously. 01 further drives the worm gears 402 on both sides to rotate. The boss 403 on the inner arc surface of the worm gear 402 and the groove 404 on the outer wall of the ejector rod 301 form a sliding fit, converting the rotational motion into the circumferential rotation of the ejector rod 301. In this state, the external liquid supply system delivers the release agent to the guide channel 302 at the axis of the ejector rod 301, and sprays it onto the surface of the mold cavity through the liquid outlets 303 that are evenly distributed circumferentially and axially on the conical surface of its inner end. This achieves simultaneous rotation and spraying, ensuring that the release agent is fully covered without dead corners. This process not only completes the automatic spraying of the release agent, but also effectively removes residual impurities and carbon deposits in the mold cavity using the flushing effect of the liquid spray, preventing residue accumulation from affecting the surface quality and dimensional accuracy of the subsequent castings. After the spraying is completed, the motor 408 stops rotating.Each actuator returns to its initial position under the action of the spring assembly, preparing for the next die-casting cycle. By integrating demolding, spraying, and cleaning functions into the ejector rod 301 structure, a unified operation process for demolding, spraying, and mold cleaning is achieved. This eliminates the cumbersome design of traditional processes that require an additional independent spraying mechanism and complex movement control system after demolding, significantly improving the equipment's compactness and automation level. Simultaneously, the in-situ dynamic spraying method improves the utilization rate and coating uniformity of the release agent, and actively cleans the mold cavity using fluid impact force, effectively avoiding product defects caused by residue adhesion, extending mold life, and greatly improving production cycle time and overall processing efficiency.

[0028] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0029] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A magnesium alloy shell demolding device, characterized in that: The device includes a body (100) and a die-casting mechanism disposed thereon. The die-casting mechanism includes a fixed mold (200) disposed at one end of the inner cavity of the body (100). Guide rods (201) are provided between the four corners of the inner side of the fixed mold (200) and the inner wall of the body (100). A movable mold (202) adapted to the mold closing of the fixed mold (200) is slidably connected between the four guide rods (201). Both the fixed mold (200) and the moving mold (202) are provided with demolding components. Each demolding component includes sliding holes (300) respectively opened at both ends of the fixed mold (200) and the moving mold (202) along their length. A push rod (301) is slidably connected within each sliding hole (300). The fixed mold (200) and the moving mold (202) are provided with a synchronous driving component for synchronously driving the push rod (301) to move axially along the sliding hole (300). 1) The inner end of each of the two molds is respectively matched with the inner wall of the mold cavity of the fixed mold (200) and the moving mold (202). The core of each ejector rod (301) is provided with a guide channel (302) for conveying the release agent. The outer arc surface of the inner end of each ejector rod (301) is provided with a number of liquid outlets (303) connected to the adjacent guide channel (302). The fixed mold (200) and the moving mold (202) are also provided with reset components for driving the ejector rod (301) to reset.

2. The magnesium alloy shell demolding device as described in claim 1, characterized in that: The inner end of each ejector rod (301) is tapered, and the end face of the tapered structure is in contact with the inner wall of the mold cavity. Several liquid outlets (303) on the inner end of each ejector rod (301) form a group. Each group of liquid outlets (303) is evenly distributed circumferentially and axially along the tapered surface of the ejector rod (301) where it is located.

3. The magnesium alloy shell demolding device as described in claim 1, characterized in that: The demolding assembly also includes a fixed seat (304) respectively disposed on the opposite outer side of the fixed mold (200) and the moving mold (202) near each ejector rod (301). The fixed seat (304) is provided with a through hole in the middle that is adapted to the ejector rod (301). The outer end of the ejector rod (301) is rotatably connected to a circular plate (305). The outer side of the fixed seat (304) is provided with a number of circular rods (306). The number of circular rods (306) located on the same fixed seat (304) is a group. Each group of circular rods (306) is slidably connected to the corresponding circular hole on the circular plate (305) on the same side. A spring (307) is provided between the circular plate (305) and the fixed seat (304) on the same side.

4. The magnesium alloy shell demolding device as described in claim 1, characterized in that: The synchronous drive assembly includes fixed plates (400) symmetrically arranged at both ends of the fixed mold (200) and the moving mold (202). A double-headed worm gear (401) is rotatably connected between the two fixed plates (400) on the fixed mold (200) and between the two fixed plates (400) on the moving mold (202). A worm wheel (402) is rotatably connected to each ejector rod (301) on the opposite outer side of the fixed mold (200) and the moving mold (202). The two ends of the double-headed worm gear (401) are respectively meshed with the worm wheel (402) on the same side. The worm wheel (402) is movably connected to the ejector rod (301) on the same side through a connecting piece.

5. A magnesium alloy shell demolding device as described in claim 4, characterized in that: The connector includes a boss (403) respectively disposed on the inner arc surface of the worm gear (402), and the outer arc surface of the push rod (301) is provided with a groove (404) that is slidably connected to the boss (403).

6. The magnesium alloy shell demolding device as described in claim 4, characterized in that: The synchronous drive assembly also includes a rotating rod (405) rotatably connected to the inner end fixing plate (400) of the fixed mold (200) and the moving mold (202), respectively. The two rotating rods (405) are slidably connected. The outer end of each rotating rod (405) is provided with a bevel gear one (406). The end of each double-headed worm gear (401) near the rotating rod (405) is provided with a bevel gear two (407). The bevel gear two (407) meshes with the adjacent bevel gear one (406) on the same side. The inner cavity of the machine body (100) is provided with a motor (408). The motor (408) is fixedly connected to one end of the rotating rod (405).

7. A magnesium alloy shell demolding device as described in claim 6, characterized in that: The inner end of the rotating rod (405) on the fixed mold (200) is provided with a rectangular rod, and the inner end of the rotating rod (405) on the moving mold (202) is provided with a rectangular groove that is slidably connected to the rectangular rod.

8. The magnesium alloy shell demolding device as described in claim 1, characterized in that: The reset component includes a U-shaped plate (500) that is slidably connected to the outside of the fixed mold (200) and the moving mold (202). The outer end of the push rod (301) is rotatably connected to the corresponding rotating hole on the adjacent U-shaped plate (500) on the same side. The slots provided on the inner end of the U-shaped plate (500) are all slidably connected to sliding plates (501). Springs (502) are provided between the sliding plates (501) and the slots they are in.

9. A magnesium alloy shell demolding device as described in claim 1, characterized in that: The die-casting mechanism further includes a hydraulic cylinder (203) located in the inner cavity of the machine body (100) near the moving mold (202). The telescopic end of the hydraulic cylinder (203) is fixedly connected to the moving mold (202). An injection machine (204) is provided at the end of the machine body (100) near the fixed mold (200). The discharge port of the injection machine (204) is connected to the feed port of the fixed mold (200).

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