Differential pressure casting equipment and casting method thereof

Abstract

The invention discloses counter-pressure casting equipment and a casting method thereof, and relates to the technical field of casting, the counter-pressure casting equipment comprises a supporting frame, and a static mold mechanism is mounted on one side of the supporting frame. According to the counter-pressure casting equipment, a third electric push rod works to push a rack to move, a gear rotates, a rotating rod and a rotating disc are driven to rotate, and a material receiving disc moves to the position below an upper movable mold; the material receiving disc is arranged, demolded products are received, the products can be conveniently received and fed by adjusting the position and the inclination angle of the material receiving disc, collision of the products is reduced, and the quality of the products is improved. The upper movable mold and the lower static mold are closed, the first cavity and the second cavity are communicated, the pressure in a closed space formed by the first cavity and the second cavity is balanced with the pressure in the sealing cover, rare gas continues to be filled into the sealing cover, molten metal enters the lower static mold and the upper movable mold through a liquid rising pipe to be filled, and the molten metal is formed in the upper movable mold and the lower static mold; and the product is formed under certain pressure, so that the forming quality of the product can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of casting, in particular to a differential pressure casting device and a casting method thereof. Background Art

[0002] Differential pressure casting is also called reverse pressure casting or differential pressure casting. When the molten metal is filling the mold, the pressure of the gas in the holding furnace is greater than the pressure of the gas in the mold. The filling, pressure holding and pressurization of the molten metal are achieved as in low-pressure casting. However, the casting is crystallized and solidified under higher pressure at this time, so a higher density casting can be guaranteed.

[0003] In the prior art, differential pressure casting equipment is used to cast workpieces. The cast workpieces need to be sent to a gathering place for unified processing. However, most of the material receiving structures can only adjust the position horizontally to move the workpieces, and cannot adjust their vertical position and inclination angle, resulting in the workpieces falling a certain distance when receiving and unloading the materials. The exterior of the newly cast workpiece is relatively fragile and easily bumped, causing damage to the workpiece. Summary of the invention

[0004] The object of the present invention is to provide a differential pressure casting equipment and a casting method thereof, so as to solve the problem that the receiving structure proposed in the above-mentioned background technology cannot directly fit with the workpiece when receiving the material, resulting in collision of the workpiece and affecting the quality of the workpiece. The present invention drives the rack to move through the third electric push rod, and the gear rotates, driving the rotating rod and the rotating disk to rotate. The receiving disk moves to the bottom of the upper movable mold, and the height of the receiving disk is adjusted by the hydraulic cylinder so that the receiving disk contacts the demolded product. Then the third electric push rod retracts to drive the receiving disk back to the initial position, and the fourth electric push rod pushes the receiving disk to tilt, and the product above the receiving disk is sent to the collection point. By adjusting the position and the tilt angle of the receiving disk, it is convenient to receive and feed the product, reduce the collision of the product, and improve the quality of the product.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a differential pressure casting equipment, comprising a support frame, a static mold mechanism is installed on one side of the support frame, a dynamic mold mechanism is installed on the top of the static mold mechanism, and a material receiving mechanism is installed on the other side of the support frame, and the material receiving mechanism comprises a mounting plate, the bottom of the mounting plate is fixedly connected to one side of the support frame, the top of the mounting plate is fixedly connected to a hydraulic cylinder, one end of the hydraulic cylinder is fixedly connected to a lifting plate, the middle part of the lifting plate is rotatably connected to a rotating rod, the top of the rotating rod is slidably connected to one end of the support frame, the outside of the rotating rod is fixedly connected to a rotating disk, the top of the rotating disk is fixedly connected to a moving rod, one end of the moving rod is rotatably connected to a material receiving disk, one side of the material receiving disk is rotatably connected to a fourth electric push rod, one end of the fourth electric push rod is rotatably connected to one side of the moving rod, the bottom end of the rotating rod is fixedly connected to a gear, and one side of the gear is meshed with a rack.

[0006] Preferably, a sliding bar is fixedly connected to one side of the gear, a sliding rail is slidably connected to one side of the sliding bar, and one end of the sliding rail is fixedly connected to the bottom side of the lifting plate.

[0007] Preferably, one end of the rack is fixedly connected to a third electric push rod, and one side of the third electric push rod is fixedly connected to the bottom of the lifting plate.

[0008] Preferably, the static mold mechanism includes a base plate, the base plate is fixedly connected to one side of the support frame, the top of the base plate is fixedly connected to a lower static mold, the middle of the lower static mold is fixedly connected to a liquid riser, one end of the liquid riser passes through the middle of the base plate, and a second cavity is opened on one side of the lower static mold.

[0009] Preferably, a sealing cover is fixedly connected to the bottom of the base plate, a heat preservation furnace is fixedly connected to the interior of the sealing cover, and a heating pipe is fixedly connected to the exterior of the heat preservation furnace.

[0010] Preferably, one side of the sealing cover is fixedly connected to a third connecting pipe, and the other side of the sealing cover is fixedly connected to a second connecting pipe.

[0011] Preferably, the movable mold mechanism includes a top plate and a first guide rod, the four corners of the top plate are fixedly connected to one end of four first guide rods respectively, the other ends of the four first guide rods are fixedly connected to the four corners of the bottom plate, the outside of the first guide rod is slidably connected to a sliding sleeve, one side of the sliding sleeve is fixedly connected to a movable plate, the top of the top plate is fixedly connected to a first electric push rod, one end of the first electric push rod is fixedly connected to the top of the movable plate, one side of the movable plate is fixedly connected to an upper movable mold, a first cavity is opened inside the upper movable mold, a connecting pipe is opened inside the movable plate, one end of the connecting pipe is connected to the first cavity, and the other end of the connecting pipe is fixedly connected to a first connecting pipe.

[0012] Preferably, a second electric push rod is fixedly connected to the top of the movable plate, one end of the second electric push rod passes through the movable plate and is fixedly connected to a movable disk, one side of the movable disk is slidably connected to a second guide rod, one end of the second guide rod is fixedly connected to the inside of the first cavity, and one side of the movable disk is fixedly connected to a push rod.

[0013] Preferably, the four corners of the bottom side of the upper movable mold are fixedly connected with positioning rods, and the four corners of the top end of the lower static mold are provided with positioning grooves.

[0014] A differential pressure casting method comprises the following steps: S1. Feed the molten metal into the interior of the holding furnace through the feed port of the sealing cover, close the feed port, and drive the movable plate and the upper movable mold to move by the first electric push rod. Insert the positioning rod at the bottom of the upper movable mold into the positioning groove, close the upper movable mold and the lower static mold, and connect the first cavity with the second cavity in a sealed state. S2, filling the closed space formed by the first cavity and the second cavity with rare gas through the first connecting pipe, and filling the closed space inside the sealing cover with rare gas through the third connecting pipe, so that the two closed spaces achieve pressure balance; S3, then fill the sealing cover with rare gas through the second connecting pipe, and the molten metal in the insulation furnace is pressed into the lower static mold and the upper movable mold through the liquid riser for casting and forming. After the product is formed, the upper movable mold is moved upward, and the second electric push rod pushes the moving plate and the push rod to move, so as to push the formed product out of the mold; S4. At this time, the third electric push rod works to push the rack to move, and the gear rotates to move the receiving tray to the bottom of the upper movable mold to catch the demoulded product.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, the third electric push rod is used to push the rack to move, the gear rotates, and the rotating rod and the rotating disk rotate. The receiving disk moves to the bottom of the upper movable mold, and the height of the receiving disk is adjusted by the hydraulic cylinder so that the receiving disk contacts the demoulded product. Then, the third electric push rod retracts and drives the receiving disk back to the initial position. The fourth electric push rod pushes the receiving disk to tilt, and the product above the receiving disk is sent to the collection place. By adjusting the position and tilt angle of the receiving disk, it is convenient to receive and send the product, reduce the bump of the product, and improve the quality of the product. 2. In the present invention, the first electric push rod is used to push the moving plate to move, drive the upper movable mold to move, the upper movable mold is molded with the lower static mold, the first cavity is connected with the second cavity, and the rare gas is respectively sent into the closed space formed by the first cavity and the second cavity and the inside of the sealing cover, so that the pressure of the two spaces is balanced, and the rare gas is continuously filled into the inside of the sealing cover, and the molten metal in the insulation furnace enters the lower static mold and the upper movable mold through the liquid riser to be filled, and the molten metal is formed inside the upper movable mold and the lower static mold, and the product is formed under a certain pressure, which can improve the molding quality of the product; 3. In the present invention, the first electric push rod drives the upper movable mold to separate from the lower static mold, and the second electric push rod drives the movable plate to move, driving the push rod to move, and the push rod pushes the product formed inside the upper movable mold out of the mold, thereby improving the demolding efficiency of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a first three-dimensional structural schematic diagram of a differential pressure casting device of the present invention; Figure 2 It is a second three-dimensional structural schematic diagram of a differential pressure casting device of the present invention; Figure 3 It is a schematic diagram of the connection structure of a material receiving mechanism of a differential pressure casting device of the present invention; Figure 4 It is a schematic diagram of the disassembled structure of a material receiving mechanism of a differential pressure casting device of the present invention; Figure 5 It is a schematic diagram of the connection structure of a movable mold mechanism and a static mold mechanism of a differential pressure casting device of the present invention; Figure 6 A differential pressure casting device according to the present invention Figure 5 Schematic diagram of the internal cross-sectional structure; Figure 7 The present invention is a schematic diagram of the internal cross-sectional structure of a movable mold mechanism of a differential pressure casting device.

[0017] In the figure: 1, support frame; 2, movable mold mechanism; 21, upper movable mold; 22, top plate; 23, first electric push rod; 24, sliding sleeve; 25, positioning rod; 26, first guide rod; 27, first cavity; 28, connecting pipe; 29, first connecting pipe; 210, moving plate; 211, moving plate; 212, second electric push rod; 213, second guide rod; 214, push rod; 3, static mold mechanism; 31, sealing cover; 32, second connecting pipe; 33, bottom Plate; 34, positioning groove; 35, lower static mold; 36, third connecting pipe; 37, liquid rising pipe; 38, insulation furnace; 39, heating pipe; 310, second cavity; 4, material receiving mechanism; 41, material receiving plate; 42, third electric push rod; 43, mounting plate; 44, hydraulic cylinder; 45, lifting plate; 46, rotating plate; 47, rotating rod; 48, moving rod; 49, fourth electric push rod; 410, slide rail; 411, sliding bar; 412, gear; 413, rack. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] Example 1: Reference Figure 1 - Figure 7 As shown: a differential pressure casting device, including a support frame 1, a static mold mechanism 3 is installed on one side of the support frame 1, a movable mold mechanism 2 is installed on the top of the static mold mechanism 3, and a material receiving mechanism 4 is installed on the other side of the support frame 1. The material receiving mechanism 4 includes a mounting plate 43, the bottom of the mounting plate 43 is fixedly connected to one side of the support frame 1, the top of the mounting plate 43 is fixedly connected to a hydraulic cylinder 44, one end of the hydraulic cylinder 44 is fixedly connected to a lifting plate 45, the middle part of the lifting plate 45 is rotatably connected to a rotating rod 47, the top of the rotating rod 47 is slidably connected to one end of the support frame 1, the outside of the rotating rod 47 is fixedly connected to a rotating disk 46, and the top of the rotating disk 46 is fixedly connected to a movable Rod 48, one end of the moving rod 48 is rotatably connected to the receiving tray 41, one side of the receiving tray 41 is rotatably connected to the fourth electric push rod 49, one end of the fourth electric push rod 49 is rotatably connected to one side of the moving rod 48, the bottom end of the rotating rod 47 is fixedly connected to a gear 412, one side of the gear 412 is meshed with a rack 413; one side of the gear 412 is fixedly connected to a sliding bar 411, one side of the sliding bar 411 is slidably connected to a slide rail 410, one end of the slide rail 410 is fixedly connected to the bottom side of the lifting plate 45; one end of the rack 413 is fixedly connected to the third electric push rod 42, one side of the third electric push rod 42 is fixedly connected to the bottom of the lifting plate 45.

[0020] The third electric push rod 42 drives the rack 413 to move, and the sliding bar 411 moves accordingly. The sliding bar 411 slides inside the slide rail 410 to fix the movement path of the rack 413. One side of the rack 413 is meshed with the gear 412. During the movement of the rack 413, the gear 412 rotates, which can drive the rotating rod 47 and the rotating disk 46 to rotate, and the moving rod 48 and the receiving tray 41 to move. The receiving tray 41 moves to the bottom of the upper movable mold 21. The height of the lifting plate 45 and the receiving tray 41 can be adjusted by the hydraulic cylinder 44, so that The receiving tray 41 contacts the demoulded product, and the demoulded product falls onto the receiving tray 41. Then the third electric push rod 42 retracts to drive the rotating rod 47 to rotate in the opposite direction, and the receiving tray 41 returns to the initial position. The fourth electric push rod 49 pushes one side of the receiving tray 41 to move, and the receiving tray 41 rotates at one end of the moving rod 48, thereby driving the receiving tray 41 to tilt, and the product above the receiving tray 41 is sent to the collection area. By adjusting the position and inclination angle of the receiving tray 41, it is convenient to receive and feed the products, reduce the bumps of the products, and improve the quality of the products.

[0021] Embodiment 2: Figure 5 , Figure 6 and Figure 7As shown, the static mold mechanism 3 includes a bottom plate 33, the bottom plate 33 is fixedly connected to one side of the support frame 1, the top of the bottom plate 33 is fixedly connected to a lower static mold 35, the middle of the lower static mold 35 is fixedly connected to a liquid riser 37, one end of the liquid riser 37 passes through the middle of the bottom plate 33, and one side of the lower static mold 35 is provided with a second cavity 310; the bottom of the bottom plate 33 is fixedly connected to a sealing cover 31, the inside of the sealing cover 31 is fixedly connected to a heat preservation furnace 38, and the outside of the heat preservation furnace 38 is fixedly connected to a heating pipe 310. 9; A third connecting pipe 36 is fixedly connected to one side of the sealing cover 31, and a second connecting pipe 32 is fixedly connected to the other side of the sealing cover 31; the movable mold mechanism 2 includes a top plate 22 and a first guide rod 26, the four corners of the top plate 22 are respectively fixedly connected to one end of the four first guide rods 26, the other ends of the four first guide rods 26 are fixedly connected to the four corners of the bottom plate 33, the outside of the first guide rod 26 is slidably connected to the sliding sleeve 24, and one side of the sliding sleeve 24 is fixedly connected to the moving plate 210, a first electric push rod 23 is fixedly connected to the top of the top plate 22, one end of the first electric push rod 23 is fixedly connected to the top of the moving plate 210, and an upper movable mold 21 is fixedly connected to one side of the moving plate 210. A first cavity 27 is provided inside the upper movable mold 21, and a connecting pipe 28 is provided inside the moving plate 210. One end of the connecting pipe 28 is connected to the first cavity 27, and the other end of the connecting pipe 28 is fixedly connected to the first connecting pipe 29; a second electric push rod 212 is fixedly connected to the top of the moving plate 210, one end of the second electric push rod 212 passes through the moving plate 210 and is fixedly connected to a moving disk 211, one side of the moving disk 211 is slidably connected to a second guide rod 213, one end of the second guide rod 213 is fixedly connected to the inside of the first cavity 27, and one side of the moving disk 211 is fixedly connected to a push rod 214; the four corners of the bottom side of the upper movable mold 21 are fixedly connected to positioning rods 25, and the four corners of the top of the lower static mold 35 are provided with positioning grooves 34.

[0022] The first electric push rod 23 is used to push the moving plate 210 to move. The sliding sleeve 24 at the end of the moving plate 210 slides outside the first guide rod 26 to fix the moving path of the moving plate 210. The movement of the moving plate 210 drives the upper movable mold 21 to move. The positioning rod 25 is inserted into the interior of the positioning groove 34. The upper movable mold 21 and the lower static mold 35 are molded together. The first cavity 27 is connected to the second cavity 310. A closed space is formed between the first cavity 27 and the second cavity 310. The first connecting pipe 29 and the third connecting pipe 34 are connected to each other. The connecting pipe 36 is externally connected to a rare gas delivery device, and the rare gas is delivered into the closed space formed by the first cavity 27 and the second cavity 310 through the first connecting pipe 29 and the connecting pipe 28. The rare gas enters the closed space inside the sealing cover 31 through the third connecting pipe 36, so that the pressure of the closed space formed by the first cavity 27 and the second cavity 310 is balanced with the pressure of the internal space of the sealing cover 31. Then, the rare gas delivery device is externally connected to the second connecting pipe 32, and the rare gas is filled into the interior of the sealing cover 31. The molten metal in the heat preservation furnace 38 enters the lower static mold 35 and the upper movable mold 21 through the liquid riser 37 for filling. The molten metal is formed in the upper movable mold 21 and the lower static mold 35. A heating pipe 39 is arranged outside the heat preservation furnace 38. The heating pipe 39 works to keep the molten metal in the heat preservation furnace 38 in a fluid state. After the product is formed, the first electric push rod 23 works to drive the upper movable mold 21 to separate from the lower static mold 35. The second electric push rod 212 works to push the movable plate 211 to move. The movable plate 211 is moved on the second guide rod 213. The external sliding, fixed movable plate 211 moves in the vertical direction, the movement of movable plate 211 drives the push rod 214 to move, the push rod 214 pushes the product formed inside the upper movable mold 21 out of the mold, and improves the demoulding efficiency of the product. A feed port is provided on one side of the sealing cover 31, and a sealing plug is provided at the port of the feed port, and molten metal can be added to the interior of the insulation furnace 38 through the feed port. The internal pressure of the sealing cover 31 and the first cavity 27 is monitored by setting a pressure sensor to prevent danger caused by excessive pressure.

[0023] Embodiment 3: A differential pressure casting method, comprising the following steps: Step 1: First, the molten metal is fed into the interior of the holding furnace 38 through the feed port of the sealing cover 31, and the feed port is closed. The first electric push rod 23 works to push the moving plate 210 and the upper movable mold 21 to move, and the positioning rod 25 at the bottom end of the upper movable mold 21 is inserted into the positioning groove 34, and the upper movable mold 21 and the lower static mold 35 are closed. The first cavity 27 is connected with the second cavity 310 and is in a sealed state; Step 2: Fill the closed space formed by the first cavity 27 and the second cavity 310 with rare gas through the first connecting pipe 29, and fill the closed space inside the sealing cover 31 with rare gas through the third connecting pipe 36, so that the pressure in the two closed spaces is balanced; Step 3: Subsequently, rare gas is filled into the sealing cover 31 through the second connecting pipe 32, and the molten metal in the holding furnace 38 is pressed into the lower static mold 35 and the upper movable mold 21 through the liquid riser 37 for casting. After the product is formed, the upper movable mold 21 is moved upward, and the second electric push rod 212 pushes the moving plate 211 and the push rod 214 to move, so that the formed product is pushed out of the mold; Step 4: At this time, the third electric push rod 42 works to push the rack 413 to move, and the gear 412 rotates to move the receiving plate 41 to the bottom of the upper movable mold 21 to receive the demoulded product.

[0024] The working principle and use method of the device are as follows: the first electric push rod 23 drives the moving plate 210 to move, the upper movable mold 21 moves, the upper movable mold 21 and the lower static mold 35 are closed, and a closed space is formed between the first cavity 27 and the second cavity 310. The rare gas is sent into the closed space formed by the first cavity 27 and the second cavity 310 through the first connecting pipe 29 and the connecting pipe 28, and the rare gas enters the closed space inside the sealing cover 31 through the third connecting pipe 36, so that the first cavity 27 and the second cavity 310 are closed. The pressure of the enclosed space formed by the cavity 310 is balanced with the internal space of the sealing cover 31, and the rare gas continues to be filled into the interior of the sealing cover 31 through the second connecting pipe 32. The molten metal inside the insulation furnace 38 enters the lower static mold 35 and the upper movable mold 21 through the liquid riser 37 for filling and molding. The first electric push rod 23 drives the upper movable mold 21 to separate from the lower static mold 35, and the second electric push rod 212 drives the movable plate 211 to move, driving the push rod 214 to move, and pushing out the product formed inside the upper movable mold 21.

[0025] After demolding is completed, the third electric push rod 42 works to push the rack 413 to move, and the gear 412 rotates, which can drive the rotating rod 47 and the rotating disk 46 to rotate, and the moving rod 48 and the receiving tray 41 to move. The receiving tray 41 moves to the bottom of the upper movable mold 21, and the height of the lifting plate 45 and the receiving tray 41 is adjusted by the hydraulic cylinder 44, so that the receiving tray 41 contacts the demolded product, and the demolded product falls on the receiving tray 41, and then the third electric push rod 42 retracts to drive the rotating rod 47 to rotate in the opposite direction, and the receiving tray 41 returns to the initial position, and the fourth electric push rod 49 pushes one side of the receiving tray 41 to move, and the receiving tray 41 rotates at one end of the moving rod 48, thereby driving the receiving tray 41 to tilt, and the product above the receiving tray 41 is sent to the collection point.

[0026] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A differential pressure casting device, comprising a support frame (1), characterized in that: A static mold mechanism (3) is installed on one side of the support frame (1), a dynamic mold mechanism (2) is installed on the top of the static mold mechanism (3), a material receiving mechanism (4) is installed on the other side of the support frame (1), the material receiving mechanism (4) comprises a mounting plate (43), the bottom of the mounting plate (43) is fixedly connected to one side of the support frame (1), the top of the mounting plate (43) is fixedly connected to a hydraulic cylinder (44), one end of the hydraulic cylinder (44) is fixedly connected to a lifting plate (45), the middle part of the lifting plate (45) is rotatably connected to a rotating rod (47), the rotating rod (47) is The top end is slidably connected to one end of the support frame (1); the outside of the rotating rod (47) is fixedly connected to a rotating disk (46); the top of the rotating disk (46) is fixedly connected to a moving rod (48); one end of the moving rod (48) is rotatably connected to a receiving disk (41); one side of the receiving disk (41) is rotatably connected to a fourth electric push rod (49); one end of the fourth electric push rod (49) is rotatably connected to one side of the moving rod (48); the bottom end of the rotating rod (47) is fixedly connected to a gear (412); one side of the gear (412) is meshed with a rack (413).

2. A differential pressure casting device according to claim 1, characterized in that: A sliding bar (411) is fixedly connected to one side of the gear (412), a sliding rail (410) is slidably connected to one side of the sliding bar (411), and one end of the sliding rail (410) is fixedly connected to the bottom side of the lifting plate (45).

3. A differential pressure casting device according to claim 2, characterized in that: One end of the rack (413) is fixedly connected to a third electric push rod (42), and one side of the third electric push rod (42) is fixedly connected to the bottom of the lifting plate (45).

4. A differential pressure casting device according to claim 3, characterized in that: The static mold mechanism (3) comprises a bottom plate (33), the bottom plate (33) being fixedly connected to one side of the support frame (1), the top of the bottom plate (33) being fixedly connected to a lower static mold (35), the middle of the lower static mold (35) being fixedly connected to a liquid riser (37), one end of the liquid riser (37) passing through the middle of the bottom plate (33), and a second cavity (310) being opened on one side of the lower static mold (35).

5. A differential pressure casting device according to claim 4, characterized in that: The bottom of the bottom plate (33) is fixedly connected to a sealing cover (31), the interior of the sealing cover (31) is fixedly connected to a heat preservation furnace (38), and the exterior of the heat preservation furnace (38) is fixedly connected to a heating pipe (39).

6. A differential pressure casting device according to claim 5, characterized in that: One side of the sealing cover (31) is fixedly connected to a third connecting pipe (36), and the other side of the sealing cover (31) is fixedly connected to a second connecting pipe (32).

7. A differential pressure casting device according to claim 6, characterized in that: The movable mold mechanism (2) comprises a top plate (22) and a first guide rod (26); the four corners of the top plate (22) are respectively fixedly connected to one end of four first guide rods (26); the other ends of the four first guide rods (26) are fixedly connected to the four corners of the bottom plate (33); the outside of the first guide rod (26) is slidably connected to a sliding sleeve (24); one side of the sliding sleeve (24) is fixedly connected to a moving plate (210); the top of the top plate (22) is fixedly connected to a first An electric push rod (23), one end of the first electric push rod (23) is fixedly connected to the top of the movable plate (210), one side of the movable plate (210) is fixedly connected to the upper movable mold (21), a first cavity (27) is provided inside the upper movable mold (21), a connecting pipe (28) is provided inside the movable plate (210), one end of the connecting pipe (28) is connected to the first cavity (27), and the other end of the connecting pipe (28) is fixedly connected to the first connecting pipe (29).

8. A differential pressure casting device according to claim 7, characterized in that: A second electric push rod (212) is fixedly connected to the top of the moving plate (210); one end of the second electric push rod (212) passes through the moving plate (210) and is fixedly connected to a moving disk (211); one side of the moving disk (211) is slidably connected to a second guide rod (213); one end of the second guide rod (213) is fixedly connected to the inside of the first cavity (27); and one side of the moving disk (211) is fixedly connected to a push rod (214).

9. A differential pressure casting device according to claim 8, characterized in that: The four corners at the bottom side of the upper movable mold (21) are all fixedly connected to positioning rods (25), and the four corners at the top end of the lower static mold (35) are all provided with positioning grooves (34).

10. A differential pressure casting method, characterized in that: A differential pressure casting device according to any one of claims 1 to 9 is used, comprising the following steps: S1, feeding the molten metal into the interior of the holding furnace (38) through the feed port of the sealing cover (31), closing the feed port, operating the first electric push rod (23) to push the movable plate (210) and the upper movable mold (21) to move, inserting the positioning rod (25) at the bottom end of the upper movable mold (21) into the positioning groove (34), closing the upper movable mold (21) and the lower static mold (35), and connecting the first cavity (27) and the second cavity (310) and being in a sealed state; S2, filling the closed space formed by the first cavity (27) and the second cavity (310) with rare gas through the first connecting pipe (29), and filling the closed space inside the sealing cover (31) with rare gas through the third connecting pipe (36), so that the pressure in the two closed spaces is balanced; S3, subsequently, rare gas is filled into the interior of the sealing cover (31) through the second connecting pipe (32), and the molten metal in the heat-insulating furnace (38) is pressed into the interior of the lower static mold (35) and the upper movable mold (21) through the liquid riser (37) for casting and molding. After the product is molded, the upper movable mold (21) is moved upward, and the second electric push rod (212) pushes the movable plate (211) and the push rod (214) to move, so that the molded product is pushed out of the mold; S4. At this time, the third electric push rod (42) works to push the rack (413) to move, and the gear (412) rotates to move the receiving plate (41) to the bottom of the upper movable mold (21) to receive the demoulded product.

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