Pulping and feeding mechanism and magnesium alloy semi-solid extrusion forming casting process

Abstract

The pulping and feeding mechanism comprises a feeding device, a seat stand pushing device and a melt injection assembly, the melt injection assembly comprises a melt device, a valve device, an injection device and an injection port, the output end of the feeding device is connected with the melt device, and the output end of the injection device is connected with the valve device. The valve device is arranged between the melting device and the injection device, the melt injection assembly is installed on the seat platform pushing device, the seat platform pushing device drives the melt injection assembly to advance and retreat, the injection device comprises an injection cylinder, an injection plunger assembly and an injection oil cylinder, and the injection oil cylinder is in driving connection with the injection plunger assembly. The injection plunger assembly is movably arranged on the syringe, an acting piece is arranged on the injection plunger assembly, and a travel switch is arranged on the injection device. According to the pulping and feeding mechanism, the melting device, the valve device, the injection device and the injection port are arranged, so that the weight of slurry conveyed to the injection chamber of the tilting vertical injection mechanism every time is controlled more accurately.

Description

Technical Field

[0001] This invention relates to the field of extrusion molding technology, and in particular to a slurry feeding mechanism and a semi-solid extrusion molding casting process for magnesium alloys. Background Technology

[0002] Magnesium alloy semi-solid extrusion molding casting process: This process is mainly completed by a mold locking mechanism, a tilting vertical injection mechanism, and a slurry preparation equipment. The process flow is as follows: the mold locking mechanism closes the mold, the slurry preparation equipment provides semi-solid slurry, which is injected into the injection chamber of the tilting vertical injection mechanism. The injection mechanism tilts to the injection station, extruding the magnesium alloy semi-solid slurry into the mold cavity. After cooling and forming, the mold is opened to obtain the product. The traditional slurry preparation equipment is a furnace, and then a feeder feeds the material to the injection chamber. In this process, the furnace and slurry are open and greatly affected by the environment. The temperature and weight of the slurry are not controlled, and the slurry may overflow during transportation or splash due to the vibration of the robotic arm.

[0003] Therefore, further improvements are necessary. Summary of the Invention

[0004] The purpose of this invention is to provide a slurry feeding mechanism and a magnesium alloy semi-solid extrusion casting process that are simple in structure, safe and reliable, have high slurry uniformity, long service life and strong practicality, so as to overcome the shortcomings of the prior art.

[0005] A pulping and feeding mechanism designed for this purpose includes a feeding device and a platform pushing device. Its key feature is that it further includes a molten material injection assembly, which comprises a melting device, a valve device, an injection device, and a injection port. The output end of the feeding device is connected to the melting device. The valve device is located between the melting device and the injection device. The molten material injection assembly is mounted on the platform pushing device, which drives the molten material injection assembly forward and backward. The injection device includes an injection cylinder, an injection plunger assembly, and an injection cylinder. The injection cylinder drives and connects to the injection plunger assembly, which is movably mounted on the injection cylinder. An actuating element is provided on the injection plunger assembly, and a limit switch is provided on the injection device. When the valve device is closed, the injection cylinder is connected to the injection port. When the valve device is open, the melting device is connected to the injection cylinder. When the molten material in the melting device flows into the injection cylinder through the valve device, it pushes the injection plunger assembly backward, causing the actuating element to act on the limit switch, thereby closing the valve device. When the injection cylinder drives the injection plunger assembly forward, it pushes the molten material in the injection cylinder to the injection port.

[0006] The injection plunger assembly includes a guide post, an injection cylinder with a guide plate, the guide post moving back and forth in the guide hole of the guide plate, and an adjustment and disassembly part between the actuating element and the guide post. The actuating element is adjusted and mounted on the guide post through the adjustment and disassembly part to adjust the injection volume of the molten material.

[0007] The limit switch is equipped with a trigger rod, and the trigger end of the trigger rod is equipped with a roller; when the injection plunger assembly moves backward to the corresponding position, the actuating element acts on the roller, thereby triggering the limit switch through the trigger rod, and the actuating element and the roller roll and rub against each other.

[0008] The melting device includes a melting cylinder, and the valve device includes a nozzle cylinder, a movable rod, and a conveying channel. The nozzle cylinder drives the movable rod, which is movably mounted on the conveying channel. One end of the conveying channel has a first port, and the other end has a second port. When the nozzle cylinder drives the movable rod to the first position, the movable rod closes the first port and opens the second port. The injection cylinder then passes through the conveying channel and the second port to connect with the injection port, and the valve device closes. When the nozzle cylinder drives the movable rod to the second position, the movable rod closes the second port and opens the first port. The melting cylinder then passes through the first port and the conveying channel to connect with the injection cylinder, and the valve device opens.

[0009] One end of the movable rod is provided with an outwardly protruding post, and the two ends of the post form a first sealing part and a second sealing part, respectively. A first sealing mating part is provided around the first opening, and a second sealing mating part is provided around the second opening. When the nozzle cylinder drives the movable rod to the first working position, the first sealing part abuts against the first sealing mating part to close the first opening. When the nozzle cylinder drives the movable rod to the second working position, the second sealing part abuts against the second sealing mating part to close the second opening.

[0010] The injection plunger assembly also includes an injection plunger and a connecting plate. The first piston rod of the injection cylinder is connected to the injection plunger through the connecting plate. One end of the guide rod is connected to the connecting plate. The injection plunger is movably mounted on the injection barrel. When the molten material in the melting device flows into the injection barrel through the valve device, it pushes the injection plunger to move backward, so that the injection plunger pushes the first piston rod to retract backward through the connecting plate. When the first piston rod of the injection cylinder extends forward, it drives the injection plunger to move forward through the connecting plate, so as to push the molten material in the injection barrel to the injection port. A first heating element is sleeved on the outside of the injection barrel.

[0011] The melting device also includes a screw and a second heating element. The output end of the feeding device is connected to the screw, which is rotatably installed inside the melting cylinder. The second heating element is sleeved on the outside of the melting cylinder. The output end of the feeding device drives the screw to rotate in order to prepare a semi-solid slurry.

[0012] The feeding device includes a storage motor, a gearbox, and a drive shaft assembly. The storage motor is connected to the input end of the gearbox, the output end of the gearbox is connected to the drive shaft assembly, and the drive shaft assembly is connected to the screw.

[0013] The platform pushing device includes a pushing cylinder and a storage platform. The pushing cylinder drives and connects to the storage platform. One end of the molten material cylinder is fixed on the storage platform, and the other end is connected to one end of the conveying channel. The other end of the conveying channel is connected to the injection cylinder. The gearbox and the injection cylinder are fixed on the storage platform. A hopper is provided on the top of the storage platform, and the hopper is connected to the inner cavity of the molten material cylinder. It also includes a support base with a rotatable bearing, and a support plate at the bottom of the syringe. The syringe is supported on the bearing by the support plate. When the syringe moves forward or backward, the support plate and the bearing roll and rub against each other.

[0014] A semi-solid extrusion casting process for magnesium alloys, designed for this purpose, employs the aforementioned slurry feeding mechanism, characterized by the following steps: A. The front and rear safety doors of the mold-locking mechanism close, then the mold-locking mechanism closes the mold, and the tilting vertical injection mechanism tilts to the feeding station; the melting device melts the material synchronously, then the valve device opens, and the semi-solid slurry in the melting device flows into the injection cylinder. B. When the slurry feeding mechanism receives the feeding signal, the platform pushing device drives the molten material injection assembly forward so that the injection port is aligned with the injection chamber of the tilting vertical injection mechanism. The valve device closes, the injection cylinder drives the injection plunger assembly to move forward, and the semi-solid slurry in the injection cylinder is injected into the injection chamber of the tilting vertical injection mechanism through the injection port. C. After the semi-solid slurry is injected, the platform pushing device drives the molten material injection assembly to retreat, then the molten material device melts the material, and the valve device opens to prepare for the next injection. D. The tilting vertical injection mechanism tilts to the injection station, and the injection cylinder squeezes the semi-solid slurry into the mold cavity, where it cools and waits for molding. E. After the product is formed, the mold locking mechanism opens the mold, and then the front and rear safety doors of the mold locking mechanism open, and the ejector pins eject the product.

[0015] The slurry feeding mechanism of this invention comprises a melting device, a valve device, an injection device, and an injection port. The injection device includes an injection cylinder, an injection plunger assembly, and an injection cylinder. The melting device melts magnesium alloy particles to prepare a semi-solid slurry. By opening the valve device, the semi-solid slurry enters the injection cylinder and pushes the injection plunger assembly backward, causing the actuator to act on the limit switch, thereby metering the melt and injecting it according to the required amount. Then, a tilting vertical injection mechanism is used for extrusion casting, which allows for more precise control of the weight of slurry delivered to the injection chamber of the tilting vertical injection mechanism each time, resulting in higher slurry utilization. Furthermore, this slurry feeding mechanism will prepare the slurry... Integrated with the feeding process, a semi-solid slurry is prepared and stored in a sealed melting cylinder, and then stored and injected in a sealed injection cylinder. The heating coil precisely controls the temperature. The molten material is completely sealed before being injected into the injection chamber to prevent slurry overflow. The slurry is free from oxidation and splashing, making slurry preparation safer, more reliable, and more efficient. Finally, the magnesium alloy structural parts produced by this extrusion molding casting process have good density, no porosity or shrinkage cavities, and a certain proportion of spherulitic structure, resulting in improved mechanical properties, increased elongation, and improved tensile strength. These magnesium alloy structural parts are widely used in new energy vehicle components, electric drive components, load-bearing structural components, and cycling equipment (such as shared bicycles). Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the pulping and feeding mechanism in one embodiment of the present invention.

[0017] Figure 2 This is a schematic diagram of the overall structure of the pulping and feeding mechanism from another position in one embodiment of the present invention.

[0018] Figure 3 This is a cross-sectional view of the pulping and feeding mechanism in one embodiment of the present invention.

[0019] Figure 4 This is a schematic diagram of the overall structure of the injection device in one embodiment of the present invention.

[0020] Figure 5 for Figure 3 A magnified structural diagram at point D.

[0021] Figure 6 for Figure 4 A magnified structural diagram at point E in the middle.

[0022] Figure 7 This is an exploded view of the limit switch in one embodiment of the present invention.

[0023] Figure 8 This is an exploded structural diagram of the guide post and the actuating element in one embodiment of the present invention.

[0024] Figure 9This is a partial structural schematic diagram of the pulping and feeding mechanism in one embodiment of the present invention.

[0025] Figure 10 This is a schematic diagram of the assembly structure of the mold-locking mechanism and the tilting vertical injection mechanism in one embodiment of the present invention. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0027] See Figures 1-10 This pulping and feeding mechanism includes a feeding device 1, a platform pushing device 28, and a molten material injection assembly. The molten material injection assembly includes a molten material device 2, a valve device 3, an injection device 4, and a injection port 5. The output end of the feeding device 1 is connected to the molten material device 2. The valve device 3 is located between the molten material device 2 and the injection device 4. The molten material injection assembly is mounted on the platform pushing device 28, which drives the molten material injection assembly forward and backward. The injection device 4 includes an injection cylinder 40, an injection plunger assembly 6, and an injection cylinder 7. The injection cylinder 7 drives and connects to the injection plunger assembly 6. The injection plunger assembly 6 is movably mounted on the injection cylinder 40. An actuating element 8 is provided on the injection plunger assembly 6, and a limit switch 9 is provided on the injection cylinder 7. When the valve device 3 is closed, the injection cylinder 40 is connected to the injection port 5. When the valve device 3 is open, the molten material device 2 is connected to the injection cylinder 40. The molten material (i.e., semi-solid slurry) in the molten material device 2 flows into the injection cylinder 40 through the valve device 3, pushing the injection plunger assembly. The injection plunger assembly 6 moves backward, causing the actuating element 8 to move backward, so that the actuating element 8 acts on the limit switch 9, thereby closing the valve device 3. The injection cylinder 7 drives the injection plunger assembly 6 to move forward, and the injection plunger assembly 6 pushes the molten material in the injection cylinder 40 to the injection port 5. Then, the molten material is injected into the injection chamber of the tilting vertical injection mechanism B through the injection port 5. This slurry feeding mechanism is applied to the extrusion casting machine. The extrusion casting machine is equipped with an electronic control board, which is electrically connected to the limit switch 9, the injection cylinder 7, and the nozzle cylinder 15. When the actuating element 8 acts on the limit switch 9, the electronic control board controls the nozzle cylinder 15 to drive the movable rod 16 to move upward, closing the valve device 3. The molten material in the melting device 2 stops entering the injection cylinder 40, and a certain weight of molten material enters the injection cylinder 40. The weight of molten material entering the injection cylinder 40 from the melting device 2 is basically the same each time, realizing the metering of the molten material by the injection device 4 (injection cylinder 40) and achieving the purpose of accurately controlling the weight of the slurry.

[0028] The injection plunger assembly 6 includes a guide post 10, and a guide plate 11 is provided on the injection cylinder 7. The guide post 10 moves back and forth on the guide hole of the guide plate 11. An adjustment and disassembly part is provided between the actuating element 8 and the guide post 10. The actuating element 8 is installed on the guide post 10 by adjusting the back and forth of the adjustment and disassembly part to adjust the injection volume of the molten material, that is, to adjust the weight of the molten material entering the injection cylinder 40 from the molten material device 2. The injection volume can be set according to actual needs.

[0029] The adjustment and disassembly unit includes a fixing hole 42 on the actuating member 8 and an adjustment fixing groove 43 on the guide post 10. The actuating member 8 has a through hole 44, through which the guide post 10 passes. The fixing hole 42 communicates with the through hole 44, and the adjustment fixing groove 43 is located inside the through hole 44. The fastener 45 (set screw) passes through the fixing hole 42 and is pressed into the adjustment fixing groove 43 to fix the actuating member 8 on the guide post 10. The fixing hole 42 is a threaded hole, and the fastener 45 is threaded into the threaded hole. The adjustment fixing groove 43 is an elongated groove, and the fastener 45 can be adjusted by pressing into the adjustment fixing groove 43. When it is necessary to adjust the melt injection amount, the fastener 45 is loosened, and then the actuating member 8 is slid on the guide post 10 to the desired position. Then the fastener 45 is locked, and the melt injection amount adjustment is completed.

[0030] The limit switch 9 is equipped with a trigger rod 12, and the trigger end of the trigger rod 12 is equipped with a roller 13. The roller 13 is rotatably mounted on the trigger rod 12. When the injection plunger assembly 6 moves backward to the corresponding position, the actuating element 8 acts on the roller 13, which in turn triggers the limit switch 9 through the trigger rod 12, thereby closing the valve device 3. The rolling friction between the actuating element 8 and the roller 13 can reduce the friction between the actuating element 8 and the limit switch 9.

[0031] The roller 13 is provided with a rotating shaft 46, and the trigger rod 12 is provided with a rotating hole 47. The rotating shaft 46 is rotatably connected to the rotating hole 47.

[0032] The melting device 2 includes a melting cylinder 14, and the valve device 3 includes a nozzle cylinder 15, a movable rod 16, and a conveying channel 17. The nozzle cylinder 15 drives the movable rod 16, which is movably mounted on the conveying channel 17. The conveying channel 17 has a first port 18 at its upper end and a second port 19 at its lower end. When the nozzle cylinder 15 drives the movable rod 16 to the first position (i.e., when it moves upward), the movable rod 16 closes the first port 18 and opens the second port 19. The injection cylinder 40 passes through the conveying channel 17 and the second port 19 in sequence. When the injection port 5 is connected and the valve device 3 is closed, the molten material in the injection cylinder 40 flows to the injection port 5 through the conveying channel 17 and the second port 19 in sequence during the injection. When the nozzle cylinder 15 drives the movable rod 16 to the second position (i.e., when it moves downward), the movable rod 16 closes the second port 19 and opens the first port 18. The molten material cylinder 14 connects to the injection cylinder 40 through the first port 18 and the conveying channel 17 in sequence, and the valve device 3 is opened. The molten material in the molten material cylinder 14 flows into the injection cylinder 40 through the first port 18 and the conveying channel 17 in sequence.

[0033] The lower end of the movable rod 16 is provided with an outwardly protruding post 20. The upper and lower ends of the post 20 form a first sealing part 21 and a second sealing part 22, respectively. The periphery of the first opening 18 is provided with a first sealing mating part 23, and the periphery of the second opening 19 is provided with a second sealing mating part 24. When the nozzle cylinder 15 drives the movable rod 16 to the first working position, the first sealing part 21 abuts against the first sealing mating part 23 to close the first opening 18. When the nozzle cylinder 15 drives the movable rod 16 to the second working position, the second sealing part 22 abuts against the second sealing mating part 24 to close the second opening 19.

[0034] The first sealing portion 21 and / or the first sealing mating portion 23 are conical or trumpet-shaped; the second sealing portion 22 and / or the second sealing mating portion 24 are conical or trumpet-shaped.

[0035] The injection plunger assembly 6 also includes an injection plunger 25 and a connecting plate 26. The first piston rod 27 of the injection cylinder 7 is connected to the injection plunger 25 through the connecting plate 26. One end of the guide post 10 is connected to the connecting plate 26. The injection plunger 25 is movably mounted on the injection cylinder 40. When the molten material in the melting device 2 flows into the injection cylinder 40 through the valve device 3, it pushes the injection plunger 25 backward, so that the injection plunger 25 pushes the first piston rod 27 backward through the connecting plate 26 and drives the guide post 10 to move backward along the guide plate 11. When the first piston rod 27 of the injection cylinder 7 extends forward, it drives the injection plunger 25 forward through the connecting plate 26 to push the molten material in the injection cylinder 40 to the injection port 5 and drive the guide post 10 to move forward along the guide plate 11. A first heating element 41 is sleeved on the outside of the injection cylinder 40. The first heating element 41 is a heating coil. The first heating element 41 is linearly arranged on the injection cylinder 40. The first heating element 41 can keep the molten material in the injection cylinder 40 warm.

[0036] The melting device 2 also includes a screw 29 and a second heating element 30. The output end of the feeding device 1 is connected to the screw 29, which is rotatably disposed inside the melting cylinder 14. The second heating element 30 is sleeved on the outside of the melting cylinder 14. The output end of the feeding device 1 drives the screw 29 to rotate, and the second heating element 30 heats the raw material to prepare a magnesium alloy semi-solid slurry. The second heating element 30 is a heating coil, and the second heating element 30 is arranged linearly on the melting cylinder 14. The screw 29 only melts the material and does not inject it. The screw of a traditional slurry making device is used to melt magnesium alloy particles and inject them.

[0037] The feeding device 1 includes a storage motor 31, a gearbox 32 and a drive shaft assembly 33. The storage motor 31 is connected to the input end of the gearbox 32, the output end of the gearbox 32 is connected to the drive shaft assembly 33, and the drive shaft assembly 33 is connected to the screw 29. The gearbox 32 includes an outer housing 48 and a gear set 49. The gear set 49 is disposed inside the outer housing 48. The drive shaft assembly 33 includes a connecting shaft 50 and a drive shaft 51 that are connected to each other. The storage motor 31 drives the connecting gear set 49. The gear set 49 is connected to the connecting shaft 50. The drive shaft 51 is connected to the screw 29. The storage motor 31 drives the drive shaft assembly 33 to rotate through the gear set 49. The drive shaft assembly 33 drives the screw 29 to rotate.

[0038] The platform pushing device 28 includes a pushing cylinder 34 and a storage platform 35. The pushing cylinder 34 drives the storage platform 35. One end of the molten material cylinder 14 is fixed on the storage platform 35, and the other end is connected to one end of the conveying channel 17. The other end of the conveying channel 17 is connected to the injection cylinder 40 and the injection port 5 respectively. The gearbox 32 (outer box 48) and the injection cylinder 7 are fixed on the storage platform 35. The pushing cylinder 34 drives the molten material injection assembly to move back and forth through the storage platform 35. A hopper 36 is provided on the top of the storage platform 35. The hopper 36 is connected to the inner cavity of the molten material cylinder 14. Magnesium alloy raw materials can be put into the inner cavity of the molten material cylinder 14 through the hopper 36.

[0039] It also includes a base 52, the second piston rod 53 of the push cylinder 34 is connected to the base 52, the tail end of the push cylinder 34 is connected to the storage platform 35, the transmission shaft assembly 33 is rotatably mounted on the storage platform 35, the push cylinder 34 drives the storage platform 35 to move back and forth linearly, and when the storage platform 35 moves forward, it drives the molten material injection assembly to move to the tilting vertical injection mechanism B; the cylinder body of the push cylinder 34 is connected to the storage platform 35. When the push cylinder 34 is working, since the base 52 is fixed, the cylinder body of the push cylinder 34 moves, thereby driving the storage platform 35 to move back and forth linearly.

[0040] A guide post 54 is provided on the base 52. The storage platform 35 is linearly movable on the guide post 54. A sliding seat 55 is provided at the bottom of the storage platform 35. The sliding seat 55 is linearly slidably mounted on the guide post 54. Two limit switches 56 are provided on the sliding seat 55. Two limit members 57 are correspondingly provided on the outside of the base 52. The limit switches 56 are electrically connected to the control board. The control board is electrically connected to the push cylinder 34. When the storage platform 35 moves to the maximum position, the limit member 57 acts on the limit switch 56, and the control board controls the push cylinder 34 to stop working.

[0041] It also includes a support base 37, on which a rotatable bearing 38 is provided. A support plate 39 is provided at the bottom of the injection cylinder 40. The injection cylinder 40 is supported on the bearing 38 by the support plate 39, which can prevent the injection cylinder 40 from sagging due to gravity, making the structure of the slurry feeding mechanism C more stable. When the injection cylinder 40 moves forward or backward, the support plate 39 and the bearing 38 roll and rub against each other, which can reduce friction.

[0042] The extrusion casting machine includes a mold-locking mechanism A and a tilting vertical injection mechanism B. Mold-locking mechanism A includes a tail plate 58, a middle plate 59, and a head plate 60. The moving mold is fixed on the middle plate 59, and the fixed mold is fixed on the head plate 60. The tail plate 58 and head plate 60 are connected by a guide rod 61. The middle plate 59 is movably mounted on the guide rod 61. The tail plate 58 and middle plate 59 are connected by a hinge mechanism, which includes a crosshead 62, a hook hinge 63, an intermediate hinge 64, and a long hinge 65. The left and right ends of the crosshead 62 are slidably connected to the tail plate 58, and the upper and lower ends of the crosshead 62 are hinged to the corresponding intermediate hinges 64. The left and right ends of the intermediate hinges 64 are hinged to the corresponding hook hinges 63. One end of the hook hinge 63 is hinged to the tail plate 58, and the other end is hinged to the long hinge 65. One end of the long hinge 65 is hinged to the middle plate 59, and the other end of the long hinge 65 is hinged to the middle plate 59. A mold-locking cylinder 66 is provided on the tail plate 58. The mold-locking cylinder 66 drives the cross head 62 to move back and forth. Thus, the cross head 62 drives the middle plate 59 to move back and forth through the intermediate hinge 64, the hook hinge 63 and the long hinge 65. When the middle plate 59 moves backward, the mold closes. When the middle plate 59 moves forward, the mold opens. A first hinge lug 67 is provided on the tail plate 58, and a second hinge lug 68 is provided on the middle plate 59. One end of the hook hinge 63 is hinged to the first hinge lug 67, and the other end of the long hinge 65 is hinged to the second hinge lug 68. The intermediate hinge 64 is a small hinge. The mold-locking mechanism A is a five-point outward opening inclined elbow hinge force-expanding mold-locking mechanism. This mold-locking mechanism has a large mold-opening stroke and is more practical for deep cavity molds.

[0043] The head plate 60 has a mounting plate 69 at its bottom. The tilting vertical injection mechanism B is tilted and mounted on the mounting plate 69. The structure of the tilting vertical injection mechanism B can be found in patent CN220591541U, and will not be described in detail here.

[0044] This semi-solid extrusion casting process for magnesium alloys, using the slurry feeding mechanism C, includes the following steps: A. The front and rear safety doors of the mold-locking mechanism A are closed, and then the mold-locking mechanism A closes the mold. The tilting vertical injection mechanism B tilts to the feeding station. The melting device 2 melts the material synchronously, and then the valve device 3 opens. The semi-solid slurry in the melting device 2 flows into the injection cylinder 40 and waits for the feeding signal. B. When the slurry feeding mechanism C receives the feeding signal, the platform pushing device 28 drives the molten material injection assembly forward so that the injection port 5 is aligned with the injection chamber of the tilting vertical injection mechanism B. The valve device 3 is closed, the injection cylinder 7 drives the injection plunger assembly 6 to move forward, and the semi-solid slurry in the injection cylinder 40 is injected into the injection chamber of the tilting vertical injection mechanism B through the injection port 5. C. After the semi-solid slurry is injected, the platform pushing device 28 drives the molten material injection assembly to retreat, then the molten material device 2 melts the material, and the valve device 3 opens to prepare for the next injection. D. The tilting vertical injection mechanism B tilts to the injection station, and the injection cylinder squeezes the semi-solid slurry into the mold cavity, where it cools and waits for molding. E. After the product is formed, the mold-locking mechanism A opens the mold, and then the front and rear safety doors of the mold-locking mechanism A open, and the ejector pin ejects the product, thereby obtaining the product.

[0045] The above describes the preferred embodiments of the present invention, illustrating and describing the basic principles, main features, and advantages of the invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pulping and feeding mechanism, comprising a feeding device (1) and a platform pushing device (28), characterized in that: It also includes a melt injection assembly, which includes a melting device (2), a valve device (3), an injection device (4), and a nozzle (5). The output end of the feeding device (1) is connected to the melting device (2). The valve device (3) is located between the melting device (2) and the injection device (4). The melt injection assembly is mounted on a platform pushing device (28). The platform pushing device (28) drives the melt injection assembly to move forward and backward. The injection device (4) includes an injection cylinder (40), an injection plunger assembly (6), and an injection cylinder (7). The injection cylinder (7) drives the injection plunger assembly (6). The injection plunger assembly (6) is movably mounted on the injection cylinder (40). On the injection plunger assembly (6), an action element (8) is provided, and on the injection device (4), a limit switch (9) is provided. When the valve device (3) is closed, the injection cylinder (40) is connected to the injection port (5). When the valve device (3) is open, the melting device (2) is connected to the injection cylinder (40). When the molten material in the melting device (2) flows into the injection cylinder (40) through the valve device (3), it pushes the injection plunger assembly (6) to move backward, so that the action element (8) acts on the limit switch (9). Then the valve device (3) closes, and when the injection cylinder (7) drives the injection plunger assembly (6) to move forward, it pushes the molten material in the injection cylinder (40) to the injection port (5).

2. The pulping and feeding mechanism according to claim 1, characterized in that: The injection plunger assembly (6) includes a guide post (10), and a guide plate (11) is provided on the injection cylinder (7). The guide post (10) moves back and forth on the guide hole of the guide plate (11). An adjustment and disassembly part is provided between the actuating element (8) and the guide post (10). The actuating element (8) is installed on the guide post (10) by adjusting the back and forth of the adjustment and disassembly part to adjust the injection amount of molten material.

3. The pulping and feeding mechanism according to claim 1, characterized in that: A trigger rod (12) is provided on the limit switch (9), and a roller (13) is provided on the trigger end of the trigger rod (12). The roller (13) is rotatably mounted on the trigger rod (12). When the injection plunger assembly (6) moves backward to the corresponding position, the actuating element (8) acts on the roller (13), thereby triggering the limit switch (9) through the trigger rod (12), and the actuating element (8) and the roller (13) roll and rub against each other.

4. The pulping and feeding mechanism according to claim 1, characterized in that: The melting device (2) includes a melting cylinder (14), and the valve device (3) includes a nozzle cylinder (15), a movable rod (16), and a conveying channel (17). The nozzle cylinder (15) drives the movable rod (16), which is movably mounted on the conveying channel (17). One end of the conveying channel (17) is provided with a first port (18), and the other end is provided with a second port (19). When the nozzle cylinder (15) drives the movable rod (16) to move to the first position, the movable rod (16) closes the first position. When the first port (18) and the second port (19) are opened, the injection cylinder (40) is connected to the injection port (5) through the conveying channel (17) and the second port (19) in sequence, and the valve device (3) is closed; when the nozzle cylinder (15) drives the movable rod (16) to move to the second position, the movable rod (16) closes the second port (19), the first port (18) is opened, the melting cylinder (14) is connected to the injection cylinder (40) through the first port (18) and the conveying channel (17) in sequence, and the valve device (3) is opened.

5. The pulping and feeding mechanism according to claim 4, characterized in that: One end of the movable rod (16) is provided with an outwardly protruding post (20), and the two ends of the post (20) respectively form a first closed part (21) and a second closed part (22). The periphery of the first opening (18) is provided with a first closed mating part (23), and the periphery of the second opening (19) is provided with a second closed mating part (24). When the nozzle cylinder (15) drives the movable rod (16) to move to the first working position, the first closed part (21) abuts against the first closed mating part (23) to close the first opening (18). When the nozzle cylinder (15) drives the movable rod (16) to move to the second working position, the second closed part (22) abuts against the second closed mating part (24) to close the second opening (19).

6. The pulping and feeding mechanism according to claim 2, characterized in that: The injection plunger assembly (6) also includes an injection plunger (25) and a connecting plate (26). The first piston rod (27) of the injection cylinder (7) is connected to the injection plunger (25) through the connecting plate (26). One end of the guide post (10) is connected to the connecting plate (26). The injection plunger (25) is movably mounted on the injection cylinder (40). When the molten material in the melting device (2) flows into the injection cylinder (40) through the valve device (3), it pushes the injection plunger (25) to move backward, so that the injection plunger (25) pushes the first piston rod (27) to retract backward through the connecting plate (26). When the first piston rod (27) of the injection cylinder (7) extends forward, it drives the injection plunger (25) to move forward through the connecting plate (26), so as to push the molten material in the injection cylinder (40) to the injection port (5). A first heating element (41) is sleeved on the outside of the injection cylinder (40).

7. The pulping and feeding mechanism according to claim 4, characterized in that: The melting device (2) also includes a screw (29) and a second heating element (30). The output end of the feeding device (1) is connected to the screw (29). The screw (29) is rotatably disposed inside the melting cylinder (14). The second heating element (30) is sleeved on the outside of the melting cylinder (14). The output end of the feeding device (1) drives the screw (29) to rotate in order to prepare a semi-solid slurry.

8. The pulping and feeding mechanism according to claim 7, characterized in that: The feeding device (1) includes a storage motor (31), a gearbox (32) and a drive shaft assembly (33). The storage motor (31) is connected to the input end of the gearbox (32), and the output end of the gearbox (32) is connected to the drive shaft assembly (33). The drive shaft assembly (33) is connected to the screw (29).

9. The pulping and feeding mechanism according to claim 8, characterized in that: The platform pushing device (28) includes a pushing cylinder (34) and a storage platform (35). The pushing cylinder (34) drives the storage platform (35). One end of the melting cylinder (14) is fixed on the storage platform (35), and the other end is connected to one end of the conveying channel (17). The other end of the conveying channel (17) is connected to the injection cylinder (40). The gearbox (32) and the injection cylinder (7) are fixed on the storage platform (35). A hopper (36) is provided on the top of the storage platform (35). The hopper (36) is connected to the inner cavity of the melting cylinder (14). It also includes a support base (37), on which a rotatable bearing (38) is provided, and a support plate (39) is provided at the bottom of the syringe (40). The syringe (40) is supported on the bearing (38) by the support plate (39). When the syringe (40) moves forward or backward, the support plate (39) and the bearing (38) roll and rub against each other.

10. A semi-solid extrusion casting process for magnesium alloys, employing the slurry feeding mechanism (C) as described in any one of claims 1-9, characterized in that: Includes the following steps: A. The front and rear safety doors of the mold locking mechanism (A) are closed, and then the mold locking mechanism (A) closes the mold, and the tilting vertical injection mechanism (B) tilts to the feeding station; the melting device (2) melts the material synchronously, and then the valve device (3) opens, and the semi-solid slurry in the melting device (2) flows into the injection cylinder (40). B. When the slurry feeding mechanism (C) receives the feeding signal, the platform pushing device (28) drives the molten material injection assembly forward so that the injection port (5) is aligned with the injection chamber of the tilting vertical injection mechanism (B), the valve device (3) is closed, the injection cylinder (7) drives the injection plunger assembly (6) to move forward, and the semi-solid slurry in the injection cylinder (40) is injected into the injection chamber of the tilting vertical injection mechanism (B) through the injection port (5); C. After the semi-solid slurry is injected, the platform pushing device (28) drives the melt injection assembly to move backward, then the melt device (2) melts the material, and the valve device (3) opens to prepare for the next injection. D. Tilting vertical injection mechanism (B) tilts to the injection station, and the injection cylinder squeezes the semi-solid slurry into the mold cavity, cools and waits for molding; E. After the product is formed, the mold-locking mechanism (A) opens the mold, and then the front and rear safety doors of the mold-locking mechanism (A) open, and the ejector pins eject the product.

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