Magnesium alloy vacuum quantitative die-casting device

Abstract

The invention belongs to the technical field of pressure casting, and particularly relates to a magnesium alloy vacuum quantitative pressure casting device which comprises a heat preservation furnace, an inclined heating barrel is arranged in the heat preservation furnace, a material frame communicated with one end of the heating barrel is connected to the heat preservation furnace, a heat preservation barrel is connected to the upper portion of the heat preservation furnace, and a material pipe is communicated with the other end of the heating barrel and penetrates through the heat preservation barrel. A fixed die and a movable die are arranged on the left side of the heat preservation furnace, a die cavity is formed when the fixed die and the movable die are closed, and a feeding hole leading to the die cavity is formed in the middle of the fixed die. The raw materials in the heating barrel are melted through the first induction coil, the movable mold and the fixed mold are closed, the vacuum pump is controlled to vacuumize, the melted raw materials enter the die-casting charging barrel, the heat preservation effect is improved through the heat preservation barrel and the second induction coil, the raw materials are pushed into a mold cavity through the injection inner barrel, and the die-casting charging barrel and the injection inner barrel are effectively cooled through the cooling pipe. Therefore, the raw materials at the feeding hole are cooled, the situation that semi-solid raw materials exist at the feeding hole is avoided, and the die-casting effect is guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of pressure casting, and in particular relates to a magnesium alloy vacuum quantitative die-casting device. Background Art

[0002] Magnesium alloys have the advantages of low density, high specific strength, high specific stiffness and good electromagnetic shielding. In the forming process of magnesium alloys, vacuum die-casting is often used. Vacuum die-casting eliminates or significantly reduces the pores and dissolved gases in the die-casting by extracting the gas in the mold cavity during the die-casting process, thereby improving the mechanical properties and surface quality of the die-casting.

[0003] In the process of transporting the molten magnesium alloy raw materials to the mold cavity, the existing device has poor pipe insulation effect, making it difficult to ensure that the raw materials are always in a good molten state, affecting production continuity; secondly, after the die-casting is completed, the raw materials in the mold cavity need to be quickly cooled and formed, but the device has poor cooling effect on the contact area between the mold and the raw materials, especially the injection area, where semi-solid raw materials are likely to exist, affecting the demolding of the casting and product quality. Summary of the Invention

[0004] In order to overcome the shortcomings of the above-mentioned background technology, the present invention provides a magnesium alloy vacuum quantitative die-casting device.

[0005] The technical implementation scheme of the present invention is: a magnesium alloy vacuum quantitative die-casting device, including a heat preservation furnace, an inclined heating cylinder is provided inside the heat preservation furnace, a material frame connected to one end of the heating cylinder is connected to the heat preservation furnace, an heat preservation cylinder is connected to the upper part of the heat preservation furnace, the other end of the heating cylinder is connected to a material pipe, the material pipe passes through the heat preservation cylinder, and an electromagnetic valve is installed at the connection between the material pipe and the heating cylinder. A fixed mold and a movable mold are provided on the left side of the heat preservation furnace. When the fixed mold and the movable mold are closed, a mold cavity is formed. A feed hole leading to the mold cavity is opened in the middle of the fixed mold. The fixed mold is connected to the die-casting barrel at the feed hole. A hollow injection inner barrel is slidably connected in the die-casting barrel. A driving component for driving the injection inner barrel is provided on the fixed mold. A connecting pipe is connected between the material pipe and the die-casting barrel.

[0006] More preferably, an exhaust hole leading to the mold cavity is opened on the upper part of the fixed mold, and a vacuum pump is installed at the exhaust hole of the fixed mold.

[0007] More preferably, the driving assembly includes a second hydraulic cylinder and a fixed frame, the fixed mold side is connected to the fixed frame, the fixed frame is connected to the second hydraulic cylinder, and the movable rod of the second hydraulic cylinder is connected to the injection inner cylinder.

[0008] More preferably, the magnesium alloy vacuum quantitative die-casting device also includes a guide rod, a slide and a push block. The side of the fixed mold is connected to the guide rod, and a sliding slide is provided on the guide rod. The end of the slide extends into the top of the mold cavity to block the exhaust hole. The injection inner cylinder is connected to a push block located outside the die-casting barrel, and two spaced contact plates are connected to the slide, and the push block is located between the two contact plates.

[0009] More preferably, the magnesium alloy vacuum quantitative die-casting device also includes a cooling pipe, a cooling cavity is opened in the wall of the die-casting barrel, a cooling pipe leading to the cooling cavity is connected to the die-casting barrel, and a hose part is provided in the middle of the cooling pipe, which is connected to the inside of the injection inner barrel.

[0010] More preferably, the magnesium alloy vacuum quantitative die-casting device also includes a furnace cover, a rotating shaft, a hydraulic cylinder 1, a lifting rod and an L-shaped rod. The top of the insulation furnace is rotatably connected to the rotating shaft, and the furnace cover covering the material frame is connected to the rotating shaft. The top of the insulation furnace is connected to a hydraulic cylinder 1, and the movable rod of the hydraulic cylinder 1 is connected to the lifting rod. The top of the furnace cover is connected to two L-shaped rods, and straight holes are opened on the L-shaped rods. The two ends of the lifting rods are respectively located in the two straight holes.

[0011] More preferably, the magnesium alloy vacuum quantitative die-casting device also includes a partition mechanism, which includes a fixed rod and a partition. The material frame is connected to the fixed rod, and a sliding partition is provided on the fixed rod. An elastic part is connected between the partition and the material frame, and the partition is slidably connected to the middle of the material frame.

[0012] More preferably, the separation mechanism also includes a connecting rod, a guide wheel, a rotating rod, a winding wheel, a pull rope, a gear and a rack. The material frame is connected to a connecting rod, and both ends of the connecting rod are rotatably connected to the guide wheel. The inside of the insulation furnace is rotatably connected to a rotating rod, and both ends of the rotating rod are connected to the winding wheel. Pull ropes are wound on the winding wheel, and the ends of the pull ropes away from the winding wheel are connected to the partition. The two pull ropes are respectively wrapped around the two guide wheels, the rotating rod is connected to two gears, and the lifting rod is connected to two racks, and the two racks are respectively engaged with the two gears.

[0013] More preferably, the magnesium alloy vacuum quantitative die-casting device also includes a drive shaft, a cylinder is connected to the outside of the insulation furnace, a drive shaft driven by a motor is rotatably connected inside the material frame, the left end of the drive shaft is connected to a circle of stirring blades located in the heating cylinder, and the right end of the drive shaft is connected to a circle of blades located in the cylinder. The insulation furnace is divided into two upper and lower insulation chambers, and an air vent is connected between the cylinder and the upper insulation chamber of the insulation furnace, and an air inlet pipe is connected between the cylinder and the lower insulation chamber of the insulation furnace.

[0014] Compared with the prior art, the present invention has the following advantages: 1. The raw material in the heating cylinder is melted by the induction coil 1, the movable mold and the fixed mold are closed, the vacuum pump is controlled to draw a vacuum, and the melted raw material enters the die-casting cylinder. The insulation effect is improved by the insulation cylinder and the induction coil 2. The injection inner cylinder pushes the raw material into the mold cavity. The die-casting cylinder and the injection inner cylinder are effectively cooled by the cooling pipe, thereby cooling the raw material at the feed hole, avoiding the presence of semi-solid raw material at the feed hole, and ensuring the die-casting effect.

[0015] 2. The push block moves with the injection inner cylinder, and the push block pushes the contact plate, so that the slide plate does not block the exhaust hole during die casting. After the raw material injection is completed, the slide plate will synchronously block the exhaust hole with high synchronization.

[0016] 3. Control the hydraulic cylinder to lower the lifting rod and rack, the lifting rod pushes the L-shaped rod, the furnace cover opens, the gear, rotating rod and winding wheel rotate, the pull rope pulls the partition to close, and the raw materials are added to the material frame. Control the hydraulic cylinder to raise the lifting rod and rack, the furnace cover closes, the partition opens, and the raw materials above the partition fall into the heating cylinder. The furnace cover and partition open alternately, effectively reducing the heat loss in the heating cylinder.

[0017] 4. Control the motor to rotate the drive shaft, stirring blades and blades. The stirring blades heat the raw materials more evenly, and the blades allow the hot air in the lower insulation chamber of the insulation furnace to enter the upper insulation chamber, thereby using the hot air to preheat the metal raw materials in the material frame. The hot air can also enter the insulation cylinder to improve the subsequent melting efficiency and insulation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 It is a schematic diagram of the internal structure of the insulation furnace and the insulation cylinder of the present invention.

[0020] Figure 3 It is a structural schematic diagram of the fixed mold, vacuum pump, guide rod, slide plate, movable mold, die casting barrel, connecting pipe, cooling pipe, hydraulic cylinder 2 and fixed frame of the present invention.

[0021] Figure 4 It is a schematic cross-sectional view of the die-casting barrel and fixed die of the present invention.

[0022] Figure 5 For the present invention Figure 4 Side view of the .

[0023] Figure 6 This is a top view of the die casting cylinder, the injection cylinder and the cooling tube according to the present invention, wherein the die casting cylinder and the injection cylinder are cut away.

[0024] Figure 7 Schematic diagram of the connection relationship of the separation mechanism of the present invention.

[0025] Figure 8 It is a front view of the furnace cover, rotating shaft, hydraulic cylinder 1, lifting rod, L-shaped rod, gear and rack of the present invention.

[0026] Figure 9 It is a top view of the separation mechanism of the present invention.

[0027] Figure 10 The figure is a schematic diagram of the connection relationship between the drive shaft, motor, stirring blade, blade, vent pipe, air inlet pipe and cylinder of the present invention.

[0028] Among them, the above drawings include the following figure marks: 1. insulation furnace, 2. heating cylinder, 20. induction coil 1, 21. drive shaft, 22. motor, 23. stirring blade, 24. blade, 25. vent pipe, 26. air inlet pipe, 27. cylinder, 3. material frame, 30. furnace cover, 31. rotating shaft, 32. hydraulic cylinder 1, 33. lifting rod, 34. L-shaped rod, 35. straight hole, 4. material pipe, 40. solenoid valve, 41. insulation cylinder, 42. induction coil 2, 5. fixed mold, 50. mold cavity , 51. Feed hole, 52. Exhaust hole, 53. Vacuum pump, 54. Guide rod, 55. Slide plate, 56. Push block, 57. Contact plate, 6. Moving mold, 7. Die casting barrel, 70. Cooling chamber, 71. Connecting pipe, 72. Cooling pipe, 73. Hose part, 8. Inner barrel of injection molding, 81. Hydraulic cylinder 2, 82. Fixed frame, 91. Fixed rod, 92. Partition, 93. Connecting rod, 94. Guide wheel, 95. Rotating rod, 96. Winding wheel, 97. Pull rope, 98. Gear, 99. Rack. DETAILED DESCRIPTION

[0029] A magnesium alloy vacuum quantitative die-casting device, such as Figures 1-9 As shown, it includes a heat preservation furnace 1, a heating cylinder 2, an induction coil 20, a material frame 3, a material pipe 4, a fixed mold 5, a movable mold 6, a die-casting material cylinder 7, an injection inner cylinder 8 and a driving component. The heat preservation furnace 1 is provided with an inclined heating cylinder 2, and an induction coil 20 is installed on the wall of the heating cylinder 2. The right part of the heat preservation furnace 1 is fixedly connected with the material frame 3, and the lower part of the material frame 3 is connected with the upper right end of the heating cylinder 2. The upper left part of the heat preservation furnace 1 is fixedly connected with the heat preservation cylinder 41, and the lower left end of the heating cylinder 2 is connected with the material pipe 4. The left end of the material pipe 4 passes through the heat preservation cylinder 41, and an induction coil 2 42 is installed on the wall of the material pipe 4. The lower end of the material pipe 4 is provided with an electromagnetic pump with high temperature resistance and quantitative function, and an electromagnetic valve 40 is installed at the connection between the material pipe 4 and the heating cylinder 2. The structure and principle of the electromagnetic pump and the electromagnetic valve 40 are the existing technology. The left side of the heat preservation furnace 1 is provided with a fixed mold 5 and a movable plate 42. The movable mold 6 has a mold cavity 50 when the fixed mold 5 and the movable mold 6 are closed. A cooling system is provided at the fixed mold 5 and the movable mold 6. The cooling system is the existing technology. A feed hole 51 leading to the mold cavity 50 is opened in the middle of the fixed mold 5, and an exhaust hole 52 leading to the mold cavity 50 is opened on the upper part of the fixed mold 5. A vacuum pump 53 is installed at the exhaust hole 52 on the top of the fixed mold 5; the fixed mold 5 is fixedly connected to a die-casting barrel 7 on the front side of the feed hole 51, and a hollow injection inner cylinder 8 is slidably connected in the die-casting barrel 7. A driving assembly for driving the injection inner cylinder 8 is provided on the fixed mold 5, and a connecting pipe 71 is connected between the left end of the material pipe 4 and the middle part of the die-casting barrel 7; the driving assembly includes a hydraulic cylinder 2 81 and a fixed frame 82. The front side of the fixed mold 5 is fixedly connected to the fixed frame 82, and the hydraulic cylinder 2 81 is bolted to the fixed frame 82. The movable rod of the hydraulic cylinder 2 81 is connected to the front end of the injection inner cylinder 8.

[0030] like Figure 3-Figure 5As shown, the magnesium alloy vacuum quantitative die-casting device also includes a guide rod 54, a slide 55 and a push block 56. The front side of the fixed mold 5 is fixedly connected to the guide rod 54, and a slide 55 that slides back and forth is provided on the guide rod 54. The rear end of the slide 55 extends into the top of the mold cavity 50 to block the exhaust hole 52. The front side of the injection inner cylinder 8 is fixedly connected to the push block 56 located outside the die-casting barrel 7. Two spaced contact plates 57 are fixedly connected to the front of the slide 55, and the push block 56 is located between the two contact plates 57.

[0031] like Figure 4-Figure 6 As shown, the magnesium alloy vacuum quantitative die-casting device also includes a cooling pipe 72, a cooling cavity 70 is opened in the rear end wall of the die-casting barrel 7, a cooling pipe 72 leading to the cooling cavity 70 is connected to the left side of the die-casting barrel 7, a suction pump is installed at the front end of the cooling pipe 72, and the suction pump is not shown in the figure. The middle part of the cooling pipe 72 has a hose part 73, and the hose part 73 is connected to the inside of the injection inner barrel 8.

[0032] like Figure 1 、 Figure 2 、 Figure 7 and Figure 8 As shown, the magnesium alloy vacuum quantitative die-casting device also includes a furnace cover 30, a rotating shaft 31, a hydraulic cylinder 32, a lifting rod 33 and an L-shaped rod 34. The rotating shaft 31 is rotatably connected to the right side of the top of the insulation furnace 1, and the furnace cover 30 is fixedly connected to the rotating shaft 31. The furnace cover 30 covers the material frame 3. The hydraulic cylinder 32 is bolted to the top of the insulation furnace 1, and the lifting rod 33 is connected to the movable rod of the hydraulic cylinder 32. Two front-to-back symmetrical L-shaped rods 34 are fixedly connected to the top of the furnace cover 30. Straight holes 35 are opened on the left part of the L-shaped rods 34, and the front and rear ends of the lifting rod 33 are respectively located in the two straight holes 35.

[0033] like Figure 2 、 Figure 7 、 Figure 8 and Figure 9 As shown, the magnesium alloy vacuum quantitative die-casting device also includes a separation mechanism, which includes a fixed rod 91 and a partition 92. The left side of the material frame 3 is fixedly connected to the fixed rod 91, and the fixed rod 91 is provided with a partition 92 that slides left and right. An elastic member is connected between the partition 92 and the material frame 3. The elastic member is a spring, and the partition 92 is slidably connected to the middle part of the material frame 3; the separation mechanism also includes a connecting rod 93, a guide wheel 94, a rotating rod 95, a winding wheel 96, a pull rope 97, a gear 98 and a rack 99. The left side of the material frame 3 is fixedly connected to the connecting rod 9 3. The front and rear ends of the connecting rod 93 are rotatably connected to guide wheels 94. The upper side of the interior of the holding furnace 1 is rotatably connected to a rotating rod 95. The front and rear ends of the rotating rod 95 are fixedly connected to a winding wheel 96. A pull rope 97 is wound on the winding wheel 96. The ends of the pull rope 97 away from the winding wheel 96 are fixedly connected to the partition 92. The two pull ropes 97 are respectively passed around the two guide wheels 94. Two gears 98 are fixedly connected to the rotating rod 95. Two racks 99 are fixedly connected to the lifting rod 33. The two racks 99 are respectively engaged with the two gears 98.

[0034] like Figure 1 、 Figure 2 and Figure 10 As shown, the magnesium alloy vacuum quantitative die-casting device also includes a drive shaft 21, a motor 22, a stirring piece 23, a blade 24, a vent pipe 25, an air inlet pipe 26 and a cylinder 27. The right side of the insulation furnace 1 is connected to the outside of the cylinder 27, and the drive shaft 21 is rotatably connected inside the material frame 3. The left end of the drive shaft 21 extends into the heating cylinder 2, and the left end of the drive shaft 21 is connected to a circle of stirring pieces 23. The right side of the cylinder 27 is connected to the motor 22, and the output shaft of the motor 22 is connected to the right end of the drive shaft 21. The right end of the drive shaft 21 is connected to a circle of blades 24 located inside the cylinder 27. The insulation furnace 1 is divided into two upper and lower insulation chambers. The vent pipe 25 is connected between the top of the cylinder 27 and the upper insulation chamber of the insulation furnace 1, and the air inlet pipe 26 is connected between the rear side of the cylinder 27 and the lower insulation chamber of the insulation furnace 1.

[0035] In the first step, the hydraulic cylinder 32 is controlled to drive the lifting rod 33 to descend, driving the rack 99 to descend. Since the two ends of the lifting rod 33 are respectively located in the two straight holes 35, the descending lifting rod 33 will push the L-shaped rod 34, causing the L-shaped rod 34 and the furnace cover 30 to rotate counterclockwise with the rotating shaft 31 as the axis, and the furnace cover 30 opens; under the action of meshing, the descending rack 99 causes the gear 98 to rotate counterclockwise, driving the rotating rod 95 and the winding wheel 96 to rotate counterclockwise together, and the winding wheel 96 reels the pull rope 97. Under the guidance of the guide wheel 94, the pull rope 97 pulls the partition 92 to slide to the right on the fixed rod 91, the elastic member is deformed, and the partition 92 becomes closed.

[0036] In the second step, the block of magnesium alloy metal raw material is put into the material frame 3 by heating through the induction coil 20, and the motor 22 is controlled to rotate the drive shaft 21, the stirring piece 23 and the blade 24 together. The rotating blade 24 causes the hot air in the insulation chamber on the lower side of the insulation furnace 1 to enter the cylinder 27, and the hot air in the cylinder 27 then enters the insulation chamber on the upper side of the insulation furnace 1, thereby using the hot air to preheat the metal raw material in the material frame 3. The hot air can also enter the insulation cylinder 41 to improve the subsequent melting efficiency and insulation effect. Then the hydraulic cylinder 32 is controlled to make the lifting rod 33 and the rack 99 rise and reset. The rising lifting rod 33 pushes the L-shaped rod 34, so that the L The shaped rod 34 and the furnace cover 30 rotate clockwise around the rotating shaft 31 to reset, and the furnace cover 30 is closed; the rising rack 99 causes the gear 98, the rotating rod 95 and the winding wheel 96 to rotate clockwise, the winding wheel 96 relaxes the pull rope 97, the elastic member recovers, and drives the partition 92 to slide to the left on the fixed rod 91 to reset, and the partition 92 becomes open, and the preheated raw material above the partition 92 can fall into the heating tube 2; in this way, the furnace cover 30 and the partition 92 are opened alternately, which reduces the heat loss in the heating tube 2, reduces energy consumption, and improves the stability of the raw material temperature, which is beneficial to the subsequent melting and die-casting process, and improves production efficiency and product quality.

[0037] The third step is to melt the raw materials in the heating cylinder 2, stir the molten raw materials through the rotating stirring blade 23, so that the raw materials are heated more evenly, control the movable mold 6 to move forward, and close the movable mold 6 and the fixed mold 5; control the hydraulic cylinder 2 81 to drive the injection inner cylinder 8 to slide forward, and the push block 56 moves with the injection inner cylinder 8. The forward pushing block 56 will contact the front contact plate 57, and the forward pushing block 56 pushes the front contact plate 57 forward, driving the slide plate 55 to slide forward, so that the slide plate 55 no longer blocks the exhaust hole 52, and controls the vacuum pump 53 to vacuum, so that the mold cavity 50 is in a vacuum state, and the vacuum pump 53 stops vacuuming.

[0038] The fourth step is to control the hydraulic cylinder 2 81 to make the injection inner cylinder 8 and the push block 56 continue to move forward. The forward push block 56 continues to push the contact plate 57 forward. The injection inner cylinder 8 no longer blocks the connecting pipe 71. The electromagnetic valve is controlled to open and the electromagnetic pump is controlled to extract the melted raw material. The melted raw material in the heating cylinder 2 enters the die casting cylinder 7 through the material pipe 4 and the connecting pipe 71. Under the heat preservation effect of the heat preservation cylinder 41 and the heating effect of the induction coil 2 42, the raw material at the material pipe 4 is always in a good melt state. The temperature effect is good and the continuity of production is improved; then the hydraulic cylinder 2 81 is controlled to move the injection inner cylinder 8 and the push block 56 backward, the backward push block 56 is first separated from the front contact plate 57, and the backward injection inner cylinder 8 pushes the raw material in the die-casting barrel 7 into the mold cavity 50 through the feed hole 51, and the backward push block 56 contacts the rear contact plate 57. The backward push block 56 pushes the rear contact plate 57 backward, driving the slide plate 55 to slide backward, and the slide plate 55 synchronously blocks the exhaust hole 52 with high synchronization.

[0039] In the fifth step, the raw material in the mold cavity 50 is cooled and formed through the cooling system, and coolant is introduced into the cooling cavity 70 and the injection inner cylinder 8 through the cooling pipe 72 and the hose part 73 respectively, which effectively cools the die-casting barrel 7 and the injection inner cylinder 8, and cools the raw material at the feed hole 51. The cooling surface is large, which improves the cooling effect and avoids the presence of semi-solid raw material at the feed hole 51. The movable mold 6 moves backward to open the mold, and the residual raw material after cooling can be taken out together with the die-casting part, ensuring the subsequent die-casting effect and improving the product quality of the die-casting part.

Claims

1. A magnesium alloy vacuum quantitative die-casting device, comprising a heat-insulating furnace (1), wherein an inclined heating cylinder (2) is provided in the heat-insulating furnace (1), and wherein: The heat preservation furnace (1) is connected to a material frame (3) connected to one end of the heating cylinder (2), the upper part of the heat preservation furnace (1) is connected to a heat preservation cylinder (41), the other end of the heating cylinder (2) is connected to a material pipe (4) passing through the heat preservation cylinder (41), and a solenoid valve (40) is installed at the connection point between the material pipe (4) and the heating cylinder (2). A fixed mold (5) and a movable mold (6) are provided on the left side of the heat preservation furnace (1). The fixed mold (5) and the movable mold (6) When closed, the mold cavity (50) is provided. A feed hole (51) leading to the mold cavity (50) is provided in the middle of the fixed mold (5). The fixed mold (5) is connected to a die-casting barrel (7) at the feed hole (51). A hollow injection inner barrel (8) is slidably connected inside the die-casting barrel (7). A driving assembly for driving the injection inner barrel (8) is provided on the fixed mold (5). A connecting pipe (71) is connected between the material pipe (4) and the die-casting barrel (7).

2. A magnesium alloy vacuum quantitative die-casting device according to claim 1, characterized in that: An air extraction hole (52) leading to the mold cavity (50) is opened on the upper portion of the fixed mold (5), and a vacuum pump (53) is installed at the air extraction hole (52) of the fixed mold (5).

3. A magnesium alloy vacuum quantitative die-casting device according to claim 2, characterized in that: The driving assembly includes a second hydraulic cylinder (81) and a fixed frame (82), the side of the fixed mold (5) is connected to the fixed frame (82), the fixed frame (82) is connected to the second hydraulic cylinder (81), and the movable rod of the second hydraulic cylinder (81) is connected to the injection inner cylinder (8).

4. A magnesium alloy vacuum quantitative die-casting device according to claim 3, characterized in that: The magnesium alloy vacuum quantitative die-casting device also includes a guide rod (54), a slide plate (55) and a push block (56), wherein the side of the fixed mold (5) is connected to the guide rod (54), the guide rod (54) is provided with a sliding slide plate (55), the end of the slide plate (55) extends into the top of the mold cavity (50) to block the exhaust hole (52), the injection inner cylinder (8) is connected to the push block (56) located outside the die-casting barrel (7), the slide plate (55) is connected to two spaced contact plates (57), and the push block (56) is located between the two contact plates (57).

5. A magnesium alloy vacuum quantitative die-casting device according to claim 4, characterized in that the magnesium alloy The vacuum quantitative die-casting device also includes a cooling pipe (72), a cooling cavity (70) is opened in the wall of the die-casting barrel (7), the die-casting barrel (7) is connected to a cooling pipe (72) leading to the cooling cavity (70), and the middle part of the cooling pipe (72) has a hose part (73), and the hose part (73) is connected to the inside of the injection inner barrel (8).

6. A magnesium alloy vacuum quantitative die-casting device according to claim 5, characterized in that the magnesium alloy The vacuum quantitative die-casting device also includes a furnace cover (30), a rotating shaft (31), a hydraulic cylinder (32), a lifting rod (33) and an L-shaped rod (34). The top of the insulation furnace (1) is rotatably connected to the rotating shaft (31), and the furnace cover (30) covering the material frame (3) is connected to the rotating shaft (31). The top of the insulation furnace (1) is connected to the hydraulic cylinder (32), and the movable rod of the hydraulic cylinder (32) is connected to the lifting rod (33). The top of the furnace cover (30) is connected to two L-shaped rods (34), and each of the L-shaped rods (34) is provided with a straight hole (35). The two ends of the lifting rod (33) are respectively located in the two straight holes (35).

7. A magnesium alloy vacuum quantitative die-casting device according to claim 6, characterized in that: The magnesium alloy vacuum quantitative die-casting device further comprises a partition mechanism, the partition mechanism comprising a fixed rod (91) and a partition (92), the material frame (3) is connected to the fixed rod (91), a sliding partition (92) is provided on the fixed rod (91), an elastic member is connected between the partition (92) and the material frame (3), and the partition (92) is slidably connected to the middle of the material frame (3).

8. A magnesium alloy vacuum quantitative die-casting device according to claim 7, characterized in that: The partition mechanism further includes a connecting rod (93), a guide wheel (94), a rotating rod (95), a winding wheel (96), a pull rope (97), a gear (98) and a rack (99). The material frame (3) is connected to a connecting rod (93). Both ends of the connecting rod (93) are rotatably connected to the guide wheel (94). The interior of the insulation furnace (1) is rotatably connected to a rotating rod (95). Both ends of the rotating rod (95) are connected to the winding wheel (96). A pull rope (97) is wound on the winding wheel (96). The ends of the pull ropes (97) away from the winding wheel (96) are connected to the partition (92). The two pull ropes (97) are respectively passed around the two guide wheels (94). The rotating rod (95) is connected to two gears (98). The lifting rod (33) is connected to two racks (99). The two racks (99) are respectively engaged with the two gears (98).

9. A magnesium alloy vacuum quantitative die-casting device according to claim 8, characterized in that: The magnesium alloy vacuum quantitative die-casting device also includes a drive shaft (21), the outside of the insulation furnace (1) is connected to a cylinder (27), the material frame (3) is rotatably connected to the drive shaft (21) driven by a motor (22), the left end of the drive shaft (21) is connected to a circle of stirring blades (23) located in the heating cylinder (2), and the right end of the drive shaft (21) is connected to a circle of blades (24) located in the cylinder (27), the insulation furnace (1) is divided into two upper and lower insulation chambers, a ventilation pipe (25) is connected between the cylinder (27) and the upper insulation chamber of the insulation furnace (1), and an air inlet pipe (26) is connected between the cylinder (27) and the lower insulation chamber of the insulation furnace (1).

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