A high chromium cast iron wear-resistant material forming process

Abstract

The present invention belongs to the technical field of material forming, and provides a high-chromium cast iron wear-resistant material forming process, comprising the following steps: Step S1: conveying slurry to a forming device, storing the slurry in a barrel, moving the upper mold downward to contact the lower mold to form a mold cavity, and opening the valve on the drop pipe to allow the slurry to enter the mold cavity. Compared with the prior art, the beneficial effects of the present invention are as follows: the second telescopic member drives the lifting plate to move downward quickly, and the support plate will squeeze and push the slurry to flow after contacting the slurry in the mold cavity, so that the slurry splashes and impacts the inner walls of the upper mold and the lower mold. Under the impact of the slurry, the gas gathered on the inner wall surface of the upper mold and the lower mold is separated, and at the same time, the gas dissolution equilibrium is broken, so that the gas molecules originally dissolved in the slurry are more likely to gather to form bubbles and escape from the solution.

Description

Technical Field

[0001] The invention belongs to the technical field of material forming, and in particular relates to a forming process of a high-chromium cast iron wear-resistant material. Background Art

[0002] High chromium cast iron is the abbreviation of high chromium white cast iron, which is a kind of wear-resistant material with excellent performance and is particularly valued. It has much higher wear resistance than alloy steel, and much higher toughness and strength than ordinary white cast iron. At the same time, it also has good high temperature resistance and corrosion resistance. In addition, it is easy to produce and has moderate cost, so it is known as one of the best wear-resistant materials in contemporary times.

[0003] When producing high-chromium cast iron wear-resistant materials, the slurry needs to be poured into the mold to cool and form. During the transportation and pouring process, air will dissolve into the slurry, and the inner wall of the mold will also adhere to the accumulated gas, resulting in a large amount of gas in the slurry after pouring. The presence of gas in the slurry will cause porosity defects in the casting and reduce the quality of the casting. Summary of the invention

[0004] The purpose of the present invention is to provide a high chromium cast iron wear-resistant material molding process, aiming to solve the technical problem in the prior art that a large amount of gas exists in the slurry, resulting in porosity defects in the casting.

[0005] The present invention is achieved in that a high chromium cast iron wear-resistant material forming process comprises the following steps:

[0006] Step S1: conveying the slurry to the molding device, storing the slurry in the barrel, moving the upper mold downward to contact the lower mold to form a mold cavity, and opening the valve on the drop pipe to allow the slurry to enter the mold cavity;

[0007] Step S2: When the slurry of a set height enters the mold cavity, the valve on the drop pipe is closed, and the lifting frame is driven to move downward quickly through the second telescopic member. After the support plate contacts the slurry in the mold cavity, it squeezes and pushes the slurry to flow, so that the slurry splashes and impacts the inner walls of the upper mold and the lower mold;

[0008] Step S3: the lifting frame is reset, and the valve on the blanking pipe is opened again to inject slurry, and the operation of the above step S2 is repeated again after the slurry in the subsequent mold cavity reaches the set height again;

[0009] Step S4: After the mold cavity is filled with slurry, molding is performed. After the casting is formed, the upper mold is reset, and then the first telescopic member drives the push plate to move upward to push the casting away from the lower mold.

[0010] Further technical solution: The molding device includes a base, on which a lower mold is fixedly installed, and an upper mold that moves up and down and is used in conjunction with the lower mold is provided on the base. A second telescopic member is fixedly installed on the surface of the upper mold away from the base, and a lifting frame with a frame-type structure is fixedly installed on the output end of the second telescopic member. The lifting frame penetrates the top side wall of the upper mold and the lifting frame is in sliding contact with the upper mold. A support plate is fixedly installed on one end of the lifting frame located in the upper mold, and the support plate is used in conjunction with a slot provided on the top side wall of the upper mold. A barrel is fixedly installed on the support plate, and a feed pipe and a blanking pipe are respectively connected to both ends of the barrel. A valve is provided on the blanking pipe and the blanking pipe is connected to the upper mold.

[0011] Further technical solution: a push plate is slidably installed in the lower mold, a first telescopic part is fixedly installed on the surface of the lower mold close to the base, a connecting rod is fixedly installed on the output end of the first telescopic part, the connecting rod passes through the bottom side wall of the lower mold and is fixedly connected to the push plate, and the connecting rod is slidably connected to the lower mold.

[0012] Further technical solution: a bracket is fixedly installed on the base, the upper mold is slidably installed on the bracket and a first servo module for driving the upper mold to move is arranged on the bracket, a positioning rod is fixedly installed on the end face of the upper mold close to the lower mold, and the positioning rod is used in conjunction with the positioning hole opened on the end face of the lower mold.

[0013] Further technical solution: the length and width of the support plate are both greater than the lifting frame, and when the support plate is located in the slot, the lower surface of the support plate is flush with the lower surface of the side wall of the top wall of the upper mold.

[0014] Further technical solution: A moving rod is slidably installed on the top side wall of the barrel, the moving rod is coaxially arranged with the barrel, a lifting plate is fixedly installed on one end of the moving rod located in the barrel, a gap is provided between the side of the lifting plate and the inner wall of the barrel, a top plate is fixedly installed on the end of the moving rod away from the lifting plate, and a second servo module is provided on the barrel to drive the top plate to move up and down.

[0015] Further technical solution: a connecting chamber is fixedly installed on the support plate, the blanking pipe extends into the connecting chamber, a through hole is opened on the support plate and is located in the connecting chamber, the through hole is coaxially arranged with the blanking pipe, and a shielding ring is fixedly installed on the support plate and coaxially distributed around the through hole, and the inner wall of the shielding ring is flush with the inner wall of the through hole.

[0016] Further technical solution: a closing plate is slidably installed in the shielding ring and a third telescopic member is fixedly installed on the connecting chamber to drive the closing plate to move up and down. A hole is opened in the middle of the closing plate for the drop pipe to enter. The closing plate is used in conjunction with a closing cone fixedly installed at the bottom of the through hole.

[0017] Further technical solution: the closed cone is fixedly installed in the through hole through a mounting plate, the bottom surfaces of the mounting plate and the closed cone are flush with the bottom surface of the support plate, the closed cone and the through hole are coaxially arranged, the upper surface of the mounting plate is provided with a protrusion of an inverted V-shaped structure, and the lower surface of the closed plate is provided with a closed groove used in conjunction with the protrusion structure. When the closed plate contacts the mounting plate, the closed plate, the mounting plate and the bottom surface of the closed cone form a complete plane.

[0018] Further technical solution: an air pump is fixedly installed in the lifting frame, the air pump is connected to a first branch pipe and a second branch pipe, the first branch pipe is connected to the top of the barrel, the second branch pipe is connected to the top of the connecting chamber, and an air hole is opened on the closing plate, and the air hole is located in the closing groove.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. When the slurry of the set height enters the mold cavity, the valve on the drop tube is closed at this time, and then the second telescopic member drives the lifting plate to move downward quickly. After the support plate contacts the slurry in the mold cavity, it will squeeze and push the slurry to flow, causing the slurry to splash and impact the inner walls of the upper mold and the lower mold. Under the impact of the slurry, the gas gathered on the inner wall surface of the upper mold and the lower mold is separated. At the same time, the speed and state of the slurry change under the action of the impact, breaking the gas dissolution equilibrium, making it easier for the gas molecules originally dissolved in the slurry to gather to form bubbles and escape from the solution. After that, the lifting plate is reset, and the valve on the drop tube is opened again to inject the slurry. At this time, the air in the mold cavity can leave upward from the feed pipe. After the slurry in the subsequent mold cavity reaches the set height again, the above operation is repeated again, thereby reducing the gas content in the slurry and the mold cavity and improving the molding quality of the casting.

[0021] 2. The second servo module drives the lifting plate to move up and down in the barrel. When the lifting plate moves downward, it will generate a downward thrust on the slurry, thereby accelerating the speed at which the slurry leaves the drop tube. At the same time, since there is a gap between the side of the lifting plate and the inner wall of the barrel, part of the slurry will flow upward from the gap, and due to the existence of the gap and pressure, the speed of the slurry flowing from the gap is accelerated. When the lifting plate moves upward, the pressure on the slurry in the drop tube is reduced, and the falling speed is slowed down. At the same time, part of the slurry will move downward from the gap, and then when the lifting plate moves back and forth, a large amount of slurry can be accelerated to leave the drop tube, thereby increasing the flow speed of the slurry. At the same time, the lifting plate will stir the slurry in the barrel, change the flow speed of the slurry in the barrel, and then break the gas dissolution equilibrium, making it easier for the gas molecules originally dissolved in the slurry to gather to form bubbles and escape from the solution, further reducing the gas content in the slurry and improving the molding quality of the casting.

[0022] 3. When injecting slurry into the mold cavity, the third telescopic member drives the closing plate to move upward so that the drop pipe enters the closing plate. At this time, the valve on the drop pipe is opened to allow the slurry to flow out. When the slurry flows downward, it collides with the closing cone. Due to the action of the lifting plate, the speed of the slurry flowing out is accelerated, thereby increasing the intensity of the collision between the slurry and the closing cone. Under the action of the collision, the gas dissolution equilibrium is further broken, the gas content in the slurry is further reduced, and the molding quality of the casting is improved.

[0023] 4. After the slurry is transported into the barrel through the feed pipe, the feed pipe is closed by the cover plate. When the upper mold contacts the lower mold to form a closed mold cavity, in the initial state, the connecting chamber is connected to the mold cavity, and the vacuum pump extracts the air in the barrel and the connecting chamber until the barrel and the mold cavity reach the set negative pressure value, so as to reduce the air in the barrel and the mold cavity as much as possible. When the lifting plate is stirred to make the slurry precipitate air, the air pressure in the barrel will increase. At this time, the vacuum pump will continue to extract the air in the barrel, thereby extracting the air in the barrel in time. At the same time, the air precipitated after the slurry collides with the closed cone will also be extracted in time, reducing the probability of air being re-integrated into the slurry, further reducing the air content in the slurry, and improving the molding quality of the casting. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0025] Figure 2 It is a schematic diagram of the cross-sectional structure in the present invention.

[0026] Figure 3 It is a schematic diagram of the structure of the lifting frame in the present invention.

[0027] Figure 4 It is a schematic diagram of the structure inside the lifting frame of the present invention.

[0028] Figure 5 for Figure 2 A magnified schematic diagram of the A1 region in the middle.

[0029] Figure 6 It is a structural schematic diagram of the upper mold in the present invention.

[0030] Figure 7 It is a schematic diagram of the structure of the closing plate in the present invention.

[0031] Figure 8 It is a schematic diagram of the structure of the closed cone in the present invention.

[0032] In the accompanying drawings: 1. base; 2. lower mold; 3. first telescopic member; 4. push plate; 5. connecting rod; 6. bracket; 7. upper mold; 8. first servo module; 9. positioning rod; 10. positioning hole; 11. second telescopic member; 12. lifting frame; 13. support plate; 14. slot; 15. barrel; 16. feed pipe; 17. drop pipe; 18. moving rod; 19. top plate; 20. second servo module; 21. lifting plate; 22. connecting chamber; 23. shielding ring; 24. through hole; 25. closing cone; 26. mounting plate; 27. third telescopic member; 28. closing plate; 29. ​​air hole; 30. closing groove; 31. vacuum pump; 32. first branch pipe; 33. second branch pipe. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0034] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0035] like Figure 1-Figure 8 As shown, a high chromium cast iron wear-resistant material forming process provided by the present invention comprises the following steps:

[0036] Step S1: conveying the slurry to the molding device, the slurry is stored in the barrel 15, the upper mold 7 is moved downward to contact the lower mold 2 to form a mold cavity, and the valve on the drop pipe 17 is opened to allow the slurry to enter the mold cavity;

[0037] Step S2: When the slurry of a set height enters the mold cavity, the valve on the drop pipe 17 is closed, and the lifting frame 12 is driven to move downward quickly through the second telescopic member 11. After the support plate 13 contacts the slurry in the mold cavity, it squeezes and pushes the slurry to flow, so that the slurry splashes and impacts the inner walls of the upper mold 7 and the lower mold 2;

[0038] Step S3: the lifting frame 12 is reset, and the valve on the blanking pipe 17 is opened again to inject the slurry. After the slurry in the subsequent mold cavity reaches the set height again, the operation of the above step S2 is repeated;

[0039] Step S4: After the mold cavity is filled with slurry, molding is performed. After the casting is formed, the upper mold 7 is reset, and then the first telescopic member 3 drives the push plate 4 to move upward to push the casting away from the lower mold 2.

[0040] like Figure 1-Figure 3As shown, a high chromium cast iron wear-resistant material forming process provided by the present invention, the forming device includes a base 1, a lower mold 2 is fixedly installed on the base 1, a push plate 4 is slidably installed in the lower mold 2, a first telescopic member 3 is fixedly installed on the surface of the lower mold 2 close to the base 1, a connecting rod 5 is fixedly installed on the output end of the first telescopic member 3, the connecting rod 5 passes through the bottom side wall of the lower mold 2 and the connecting rod 5 is fixedly connected to the push plate 4, the connecting rod 5 is slidably connected to the lower mold 2, an upper mold 7 that moves up and down and is used in conjunction with the lower mold 2 is arranged on the base 1, a bracket 6 is fixedly installed on the base 1, the upper mold 7 is slidably installed on the bracket 6 and a first servo module 8 that drives the upper mold 7 to move is arranged on the bracket 6, a positioning rod 9 is fixedly installed on the end surface of the upper mold 7 close to the lower mold 2, and the positioning rod 9 is connected to the lower mold 2. The positioning holes 10 on the end face are used in conjunction with each other. A second telescopic member 11 is fixedly installed on the surface of the upper mold 7 away from the base 1. A lifting frame 12 of a frame-type structure is fixedly installed on the output end of the second telescopic member 11. The lifting frame 12 passes through the top side wall of the upper mold 7 and the lifting frame 12 is in sliding contact with the upper mold 7. A support plate 13 is fixedly installed at one end of the lifting frame 12 located in the upper mold 7. The support plate 13 is used in conjunction with a slot 14 provided on the top side wall of the upper mold 7. The length and width of the support plate 13 are both greater than the lifting frame 12. When the support plate 13 is located in the slot 14, the lower surface of the support plate 13 is flush with the lower surface of the top side wall of the upper mold 7. A barrel 15 is fixedly installed on the support plate 13. A feed pipe 16 and a blanking pipe 17 are respectively connected at both ends of the barrel 15. A valve is provided on the blanking pipe 17 and the blanking pipe 17 is connected with the upper mold 7.

[0041] In actual application of this embodiment, the slurry is transported to the barrel 15 through the feed pipe 16, and the upper mold 7 is driven by the first servo module 8 to move downward and contact the lower mold 2. The upper mold 7 and the lower mold 2 are accurately contacted and sealed through the positioning rod 9 and the positioning hole 10. After the upper mold 7 and the lower mold 2 contact, a mold cavity is formed, and then the valve on the drop pipe 17 is opened to allow the slurry to enter the mold cavity. When the slurry of a set height enters the mold cavity, the valve on the drop pipe 17 is closed at this time, and then the second telescopic member 11 drives the lifting frame 12 to move downward quickly. After the support plate 13 contacts the slurry in the mold cavity, it will squeeze and push the slurry to flow, so that the slurry splashes and impacts the inner walls of the upper mold 7 and the lower mold 2. Under the impact of the slurry, the upper mold 7. The gas gathered on the inner wall surface of the lower mold 2 is separated, and at the same time, the speed and state of the slurry are changed under the action of impact, breaking the gas dissolution equilibrium, making it easier for the gas molecules originally dissolved in the slurry to gather to form bubbles and escape from the solution. Then the lifting frame 12 is reset, and the valve on the drop pipe 17 is opened again to inject the slurry. At this time, the air in the mold cavity can leave upward from the feed pipe 16. After the slurry in the mold cavity reaches the set height again, the above operation is repeated, thereby reducing the gas content in the slurry and the mold cavity and improving the molding quality of the casting. The mold cavity is filled with slurry and then molding is carried out. After the casting is formed, the upper mold 7 is reset, and then the first telescopic member 3 drives the push plate 4 to move upward to push the casting out of the lower mold 2.

[0042] In one embodiment of the present invention, the first telescopic member 3 and the second telescopic member 11 are respectively a first electric telescopic rod and a second electric telescopic rod, and of course they can also be other components such as hydraulic cylinders that can actively change the length. The push plate 4 is driven to move by the first electric telescopic rod, and the lifting frame 12 is driven to move by the second electric telescopic rod.

[0043] like Figure 1-Figure 8 As shown, a high chromium cast iron wear-resistant material molding process provided by the present invention is provided. A moving rod 18 is slidably installed on the top side wall of the barrel 15. The moving rod 18 is coaxially arranged with the barrel 15. A lifting plate 21 is fixedly installed at one end of the moving rod 18 located in the barrel 15. A gap is set between the side of the lifting plate 21 and the inner wall of the barrel 15. A top plate 19 is fixedly installed at one end of the moving rod 18 away from the lifting plate 21. A second servo module 20 is set on the barrel 15 to drive the top plate 19 to move up and down.

[0044] In actual application of this embodiment, after the slurry enters the barrel 15, the feed pipe 16 is closed. When the slurry is discharged through the drop pipe 17, the second servo module 20 drives the top plate 19 to move up and down, and then drives the lifting plate 21 to move up and down in the barrel 15 through the moving rod 18. When the lifting plate 21 moves downward, it will generate a downward thrust on the slurry, thereby accelerating the speed of the slurry leaving the drop pipe 17. At the same time, since a gap is set between the side of the lifting plate 21 and the inner wall of the barrel 15, part of the slurry will flow upward from the gap, and the existence of the gap and pressure will accelerate the speed of the slurry flowing from the gap. When the descending plate 21 moves upward, the pressure on the slurry in the drop tube 17 decreases, and the falling speed slows down. At the same time, part of the slurry will move downward from the gap, and then the lifting plate 21 can accelerate a large amount of slurry to leave the drop tube 17 when it moves back and forth, thereby increasing the flow speed of the slurry. At the same time, the lifting plate 21 will have a stirring effect on the slurry in the barrel 15, causing the flow speed of the slurry in the barrel 15 to change, thereby breaking the gas dissolution equilibrium, making it easier for the gas molecules originally dissolved in the slurry to aggregate to form bubbles and escape from the solution, further reducing the gas content in the slurry and improving the molding quality of the casting.

[0045] like Figure 2 , Figure 5 , Figure 7 , Figure 8 As shown, a high chromium cast iron wear-resistant material molding process provided by the present invention is provided, a connecting chamber 22 is fixedly installed on the support plate 13, a blanking pipe 17 extends into the connecting chamber 22, a through hole 24 located in the connecting chamber 22 is opened on the support plate 13, the through hole 24 is coaxially arranged with the blanking pipe 17, a shielding ring 23 coaxially distributed around the through hole 24 is fixedly installed on the support plate 13, and the inner side wall of the shielding ring 23 is flush with the inner side wall of the through hole 24.

[0046] Specifically, a closing plate 28 is slidably installed in the shielding ring 23 and a third telescopic member 27 is fixedly installed on the connecting chamber 22 to drive the closing plate 28 to move up and down. A hole is opened in the middle of the closing plate 28 for the drop tube 17 to enter. The closing plate 28 is used in conjunction with a closing cone 25 fixedly installed at the bottom of the through hole 24.

[0047] Specifically, the closed cone 25 is fixedly installed in the through hole 24 through the mounting plate 26. The bottom surfaces of the mounting plate 26 and the closed cone 25 are flush with the bottom surface of the support plate 13. The closed cone 25 and the through hole 24 are coaxially arranged. The upper surface of the mounting plate 26 is provided with a protrusion of an inverted V-shaped structure. The lower surface of the closed plate 28 is provided with a closed groove 30 used in conjunction with the protrusion structure. When the closed plate 28 contacts the mounting plate 26, the closed plate 28, the mounting plate 26 and the bottom surface of the closed cone 25 form a complete plane.

[0048] In actual application of this embodiment, when slurry is injected into the mold cavity, the third telescopic member 27 drives the closing plate 28 to move upward so that the drop pipe 17 enters the closing plate 28. At this time, the valve on the drop pipe 17 is opened to allow the slurry to flow out. When the slurry flows downward, it collides with the closing cone 25. Due to the action of the lifting plate 21, the speed of the slurry flowing out is accelerated, thereby increasing the intensity of the collision between the slurry and the closing cone 25. Under the action of the collision, the gas dissolution equilibrium is further broken, the gas content in the slurry is further reduced, and the molding quality of the casting is improved. The slurry is prevented from overflowing by the shielding ring 23 and the closing plate 28.

[0049] When the lifting frame 12 moves downward, the valve on the blanking pipe 17 is closed, and the closing plate 28 moves downward and contacts the mounting plate 26. At this time, the closing plate 28, the mounting plate 26 and the bottom surface of the closing cone 25 form a complete plane, so that the support plate 13 is a complete plane. At this time, the support plate 13 can move downward. After the subsequent mold cavity is filled with slurry, the closing plate 28 contacts the mounting plate 26 to close the mold cavity.

[0050] In an example of the present invention, the third telescopic member 27 is a third electric telescopic rod, and of course it can also be other components that can actively change the length, such as a hydraulic cylinder, and the closing plate 28 is driven to move up and down by the third electric telescopic rod.

[0051] like Figure 1-Figure 3 As shown, a high chromium cast iron wear-resistant material molding process provided by the present invention, a vacuum pump 31 is fixedly installed in the lifting frame 12, the vacuum pump 31 is connected to the first branch pipe 32 and the second branch pipe 33, the first branch pipe 32 is connected to the top of the barrel 15, the second branch pipe 33 is connected to the top of the connecting chamber 22, and the closing plate 28 is provided with an air hole 29, and the air hole 29 is located in the closing groove 30.

[0052] In actual application of this embodiment, the slurry is transported into the barrel 15 through the feed pipe 16 and then the feed pipe 16 is closed by the cover plate. When the upper mold 7 contacts the lower mold 2 to form a closed mold cavity, in the initial state, the connecting chamber 22 is connected to the mold cavity, and the vacuum pump 31 extracts the air in the barrel 15 and the connecting chamber 22 through the first branch pipe 32 and the second branch pipe 33 until the barrel 15 and the mold cavity reach a set negative pressure value, so that the air in the barrel 15 and the mold cavity is reduced as much as possible. When the lifting plate 21 stirs the slurry to precipitate air, the air pressure in the barrel 15 will increase. At this time, the vacuum pump 31 will continue to extract the air in the barrel 15, thereby timely extracting the air in the barrel 15. At the same time, the air precipitated after the slurry collides with the closed cone 25 will also be extracted in time, reducing the probability of air being re-integrated into the slurry, further reducing the air content in the slurry, and improving the molding quality of the casting.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0054] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A high chromium cast iron wear-resistant material forming process, characterized in that: The following steps are involved: Step S1: conveying the slurry to the molding device, the slurry is stored in the barrel (15), the upper mold (7) is moved downward to contact the lower mold (2) to form a mold cavity, and the valve on the drop pipe (17) is opened to allow the slurry to enter the mold cavity; Step S2: When the slurry of a set height enters the mold cavity, the valve on the drop pipe (17) is closed, and the lifting frame (12) is driven to move downward rapidly through the second telescopic member (11). After the support plate (13) contacts the slurry in the mold cavity, it squeezes and pushes the slurry to flow, causing the slurry to splash and impact the inner walls of the upper mold (7) and the lower mold (2); Step S3: the lifting frame (12) is reset, and the valve on the material discharge pipe (17) is opened again to inject the slurry, and the operation of the above step S2 is repeated again after the slurry in the mold cavity reaches the set height again; Step S4: After the mold cavity is filled with slurry, molding is performed. After the casting is formed, the upper mold (7) is reset, and then the first telescopic member (3) drives the push plate (4) to move upward to push the casting out of the lower mold (2); The molding device comprises a base (1), a lower mold (2) is fixedly mounted on the base (1), an upper mold (7) is provided on the base (1) and moves up and down and is used in conjunction with the lower mold (2), a second telescopic member (11) is fixedly mounted on the surface of the upper mold (7) away from the base (1), a lifting frame (12) of a frame structure is fixedly mounted on the output end of the second telescopic member (11), the lifting frame (12) passes through the top side wall of the upper mold (7) and the lifting frame (12) is in sliding contact with the upper mold (7), a support plate (13) is fixedly mounted on one end of the lifting frame (12) located in the upper mold (7), the support plate (13) is used in conjunction with a slot (14) provided on the top side wall of the upper mold (7), a barrel (15) is fixedly mounted on the support plate (13), two ends of the barrel (15) are respectively connected with a feed pipe (16) and a blanking pipe (17), a valve is provided on the blanking pipe (17) and the blanking pipe (17) is connected with the upper mold (7); A push plate (4) is slidably mounted inside the lower mold (2); a first telescopic member (3) is fixedly mounted on the surface of the lower mold (2) close to the base (1); a connecting rod (5) is fixedly mounted on the output end of the first telescopic member (3); the connecting rod (5) passes through the bottom side wall of the lower mold (2) and is fixedly connected to the push plate (4); and the connecting rod (5) is slidably connected to the lower mold (2); A communication chamber (22) is fixedly mounted on the support plate (13), the blanking tube (17) extends into the communication chamber (22), a through hole (24) is opened on the support plate (13) and is located in the communication chamber (22), the through hole (24) and the blanking tube (17) are coaxially arranged, and a shielding ring (23) is fixedly mounted on the support plate (13) and is coaxially distributed around the through hole (24), and the inner side wall of the shielding ring (23) is flush with the inner side wall of the through hole (24); A closing plate (28) is slidably mounted in the blocking ring (23), and a third telescopic member (27) is fixedly mounted on the communicating chamber (22) to drive the closing plate (28) to move up and down. A hole is provided in the middle of the closing plate (28) for the drop tube (17) to enter. The closing plate (28) is used in conjunction with a closing cone (25) fixedly mounted at the bottom of the through hole (24); An air pump (31) is fixedly installed in the lifting frame (12), and the air pump (31) is connected to a first branch pipe (32) and a second branch pipe (33). The first branch pipe (32) is connected to the top of the barrel (15), and the second branch pipe (33) is connected to the top of the connecting chamber (22). An air hole (29) is opened on the closing plate (28), and the air hole (29) is located in the closing groove (30).

2. A high chromium cast iron wear-resistant material forming process according to claim 1, characterized in that: A bracket (6) is fixedly mounted on the base (1), an upper mold (7) is slidably mounted on the bracket (6), and a first servo module (8) is provided on the bracket (6) for driving the upper mold (7) to move. A positioning rod (9) is fixedly mounted on the end surface of the upper mold (7) close to the lower mold (2), and the positioning rod (9) is used in conjunction with a positioning hole (10) provided on the end surface of the lower mold (2).

3. A high chromium cast iron wear-resistant material forming process according to claim 1, characterized in that: The length and width of the support plate (13) are greater than those of the lifting frame (12); when the support plate (13) is located in the slot (14), the lower surface of the support plate (13) is flush with the lower surface of the side wall of the top wall of the upper mold (7).

4. A high chromium cast iron wear-resistant material forming process according to claim 1, characterized in that: A moving rod (18) is slidably mounted on the top side wall of the barrel (15), the moving rod (18) and the barrel (15) being arranged coaxially, a lifting plate (21) being fixedly mounted on one end of the moving rod (18) located in the barrel (15), a gap being provided between the side of the lifting plate (21) and the inner wall of the barrel (15), a top plate (19) being fixedly mounted on one end of the moving rod (18) away from the lifting plate (21), and a second servo module (20) for driving the top plate (19) to move up and down is provided on the barrel (15).

5. A high chromium cast iron wear-resistant material forming process according to claim 1, characterized in that: The closed cone (25) is fixedly mounted in the through hole (24) via a mounting plate (26); the bottom surfaces of the mounting plate (26) and the closed cone (25) are both flush with the bottom surface of the support plate (13); the closed cone (25) and the through hole (24) are coaxially arranged; a protrusion with an inverted V-shaped structure is provided on the upper surface of the mounting plate (26); a closed groove (30) used in conjunction with the protrusion structure is provided on the lower surface of the closed plate (28); when the closed plate (28) and the mounting plate (26) are in contact, the closed plate (28), the mounting plate (26) and the bottom surface of the closed cone (25) form a complete plane.

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