A dual mode casting machine

Abstract

The application discloses a double-mode casting machine and relates to the technical field of casting equipment, which comprises a rack, two symmetrical outer molds, two core mold assemblies and a cooling assembly. When the two outer molds are closed, two casting cavities are formed. Each core mold assembly comprises a top mold and two inner molds. The top mold and the two inner molds are matched with the corresponding casting cavities after being closed, and the casting of the casting is performed. The cooling assembly is arranged in the core mold assembly and is used for cooling the core mold assembly to accelerate the cooling and forming of the casting during the casting process. The top mold and the inner molds form a spiral airflow channel after being closed, and the spiral airflow channel is continuously filled with gas. The gas continuously passing through the spiral airflow channel during the casting process can take away the heat on the inner molds, so that the inner molds and the casting are cooled, and the effect of accelerating the cooling and forming of the casting is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of casting equipment, in particular to a double-mold casting machine. BACKGROUND

[0002] Casting is one of the basic processes in modern mechanical manufacturing industry. As a kind of metal hot working process, casting has gradually matured in China. The casting machine is a mechanical equipment that uses this technology to melt the metal into a liquid that meets certain requirements, pours it into a casting mold, cools and solidifies, and after cleaning treatment, obtains a casting with predetermined shape, size and performance.

[0003] Aluminum and its alloys have been widely used in modern automobile manufacturing industry due to their high strength and rigidity. Currently, aluminum alloy materials are used in various automobile parts such as cylinder head, intake manifold, piston, hub, and even vehicle body to varying degrees. With the rapid development of the automobile industry, automobile structural components have higher requirements for materials and manufacturing technology. High density, high strength, high structural complexity, and low cost will become the future development trend of aluminum and magnesium alloy casting. Under this situation, it is of great significance to accelerate the development and application of light materials represented by aluminum and magnesium and their casting technology in China.

[0004] Chinese patent CN111331125A discloses a full-automatic feeding piston casting assembly line, which comprises at least two piston casting devices, each piston casting device comprising a machine body, a mold installation platform arranged on the machine body, a mold assembly, and a mold pressing assembly. A feeding device is arranged between each piston casting device. A fixed frame is arranged on the mold installation platform. The fixed frame is vertically arranged and has an installation end and a driving end. The installation end is fixedly connected to the fixed frame. The driving end is provided with a mold opening and closing driving source vertically connected thereto. The feeding device comprises a support seat, a slide rail arranged on the support seat, and a feeding mechanism reciprocally sliding along the slide rail. The above technical solution provides a full-automatic feeding piston casting assembly line without safety hazards, full-automatic feeding, improved processing efficiency, and reduced labor costs.

[0005] Although the above can improve processing efficiency and reduce labor costs, it lacks cooling of the casting and mold assembly during the casting process, resulting in slow cooling and forming of the casting, and it cannot clean the mold assembly in real time, which can reduce the casting effect due to impurities.

[0006] Therefore, it is necessary to invent a double-mold casting machine to solve the above problems. SUMMARY

[0007] The purpose of the present application is to provide a double-mold casting machine to solve the problems raised in the background art.

[0008] To achieve the above object, the present application provides the following technical scheme: a double-mold casting machine, comprising a frame, further comprising two outer molds which are symmetrically arranged, two outer molds can form two casting cavities when they are closed; two core mold assemblies are arranged in the corresponding casting cavities, each core mold assembly comprises a top mold and two inner molds, the top mold and the two inner molds are closed and cooperated with the corresponding casting cavities to cast the casting; a cooling assembly is arranged inside the core mold assembly to cool the core mold assembly to accelerate the cooling and forming of the casting during casting; a blowing assembly is arranged above the top mold to blow and clean the outer wall of the casting cavity and the core mold assembly; a driving system is arranged at the top of the frame to drive the opening / closing of the outer mold and the inner mold and to drive the lifting of the inner mold and the top mold.

[0009] Preferably, the cooling assembly comprises: an air duct arranged inside the top mold; a connecting rod arranged in a hollow structure, and the bottom end of the connecting rod is arranged in the air duct to continuously introduce gas into the air duct; a first gas flow channel arranged inside the top mold, and the top end of the first gas flow channel penetrates to the outside of the top end of the top mold, and the bottom end of the first gas flow channel is in communication with the air duct; a second gas flow channel arranged inside the two inner molds; after the top mold and the two inner molds are closed, the first gas flow channel and the two side second gas flow channels are in communication and form a complete spiral gas flow channel, and after continuously introducing gas, the inner molds can be cooled.

[0010] Preferably, the blowing assembly comprises a blowing groove which is arranged outside the top mold and is in communication with the bottom of the air duct, and the gas in the air duct can be blown outwards through the blowing groove to blow the casting cavity.

[0011] Preferably, the blowing assembly further comprises: a plurality of sealing ring plates arranged on the top of the top mold and the inner mold, and the plurality of sealing ring plates cooperate to form a complete sealing ring when the top mold and the two inner molds are closed; a sealing cover rotatably arranged in the middle of the connecting rod and located above the top mold, the inner diameter of the bottom of the sealing cover is consistent with the outer diameter of the sealing ring; a plurality of inclined flow holes are uniformly arranged on the side wall of the sealing cover; a first reset member is arranged between the groove bottom of the air duct and the bottom end of the connecting rod to provide upward thrust to the connecting rod.

[0012] Preferably, the blowing assembly further comprises: a cutoff cover fixedly arranged on the top of the sealing cover; a shielding ring fixedly arranged on the outside of the sealing cover, and the bottom of the shielding ring and the inside of the cutoff cover are kept sealed; a piston ring sealingly and slidably arranged between the cutoff cover and the shielding ring, and capable of sliding up and down; the sealing cover, the cutoff cover, the shielding ring and the piston ring cooperatively form a closed chamber, and a plurality of through holes are formed on the sealing cover, and the through holes are in communication with the inside of the sealing cover and the closed chamber; a second elastic member arranged between the bottom of the piston ring and the shielding ring, capable of providing an upward thrust to the piston ring; a plurality of connecting rods fixedly arranged on the bottom of the piston ring, and the bottom ends of the connecting rods penetrate into the bottom of the shielding ring; and a flow guide ring fixedly arranged on the bottom ends of the plurality of connecting rods, and an elastic flow guide layer is fixedly arranged between the flow guide ring and the outside of the sealing cover.

[0013] Preferably, the sidewall of the air passage is provided with a sliding groove penetrating to the top of the top die, the sidewall of the connecting rod is fixedly provided with a sliding key located in the sliding groove, and the top of the top die is provided with a snap ring capable of limiting the highest position of the sliding key to prevent the connecting rod from being pulled out of the air passage.

[0014] Preferably, the driving system comprises: two first driving units symmetrically arranged on the top of the rack, and the driving ends of the two first driving units are fixedly connected with corresponding outer dies for driving the outer dies to open / close the mold; two second driving units symmetrically arranged on the top of the rack, and the driving ends of the two second driving units are fixedly connected with corresponding inner dies for driving the inner dies to open / close the mold and to ascend / descend; and a third driving unit arranged on the top of the rack, and the driving end of the third driving unit is fixedly connected with the top end of the connecting rod for driving the top die to ascend / descend.

[0015] Preferably, the driving frame is provided with a mechanical claw at the bottom thereof, and the driving frame drives the mechanical claw to move to grasp the castings.

[0016] Technical effects and advantages of the present application:

[0017] 1. The present application controls the top die to descend first, and continuously blows out gas from the blowing groove during the descending process, so as to blow and clean the dust and impurities attached to the inside of the outer die, ensures that the casting mold cavity is in a clean state during the casting of the casting, and ensures the casting forming effect of the casting.

[0018] 2. The present application forms a spiral airflow channel after the top die and the inner die are combined, and continuously introduces gas, so that the gas continuously passing through the spiral airflow channel during the casting process can take out the heat on the inner die, so as to cool the inner die and the casting, thereby achieving the effect of accelerating the cooling and forming of the casting.

[0019] 3、The application controls the downward movement of the sealing cover to be attached to the sealing ring after casting is completed, so that the gas blown out from the spiral airflow channel blows out the impurities between the sealing cover and the top of the core mold assembly through the plurality of inclined flow holes, realizes the blowing and cleaning of the top of the core mold assembly, and avoids the impurities from falling into the casting mold cavity and the core mold assembly during mold opening.

[0020] 4、The application increases the airflow pressure while controlling the opening of the outer mold, so that the flow guide ring is lowered to a position below the inclined flow hole, and the elastic flow guide layer is deformed, thereby guiding the airflow direction, so that the airflow blown out from the inclined flow hole can blow to the outer sidewall of the inner mold, realizing the blowing and cleaning of the outer sidewall of the inner mold, and the airflow through the inclined flow hole will continuously drive the sealing cover to rotate, so that the airflow can more uniformly and comprehensively blow the outer sidewall of the inner mold.

[0021] 5、The application controls the closing of the top end of the spiral airflow channel, and then a certain amount of gas is introduced into the air duct and pressure is maintained for a certain time, and whether there is wear and tear between the top mold and the inner mold is judged by observing whether the airflow pressure value changes, so that problems can be found and solved in time, and the smooth progress of casting work is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the application.

[0023] Figure 2 It is a schematic diagram of the structure of the driving system of the application.

[0024] Figure 3 It is a schematic diagram of the structure of the grabbing assembly of the application.

[0025] Figure 4 It is a schematic diagram of the structure of the outer mold of the application.

[0026] Figure 5 It is a schematic diagram of the structure of the core mold assembly of the application.

[0027] Figure 6 It is an exploded schematic diagram of the core mold assembly of the application.

[0028] Figure 7 It is a sectional structure schematic diagram of the sealing cover of the application.

[0029] Figure 8 It is an enlarged structure schematic diagram of A in the application. Figure 7

[0030] Figure 9 It is a sectional structure schematic diagram of the core mold assembly of the application.

[0031] ​In the figure: 1, rack; 2, outer mold; 3, core mold assembly; 4, cooling assembly; 5, purging assembly; 6, driving system; 7, grabbing assembly; 31, top mold; 32, inner mold; 41, air duct; 42, connecting rod; 43, first air flow channel; 44, second air flow channel; 51, purging groove; 52, sealing ring plate; 53, sealing cover; 54, inclined flow hole; 55, first reset element; 56, flow blocking cover; 57, shielding ring; 58, piston ring; 59, closed chamber; 510, through hole; 511, second elastic element; 512, connecting rod; 513, flow guide ring; 514, elastic flow guide layer; 515, sliding groove; 516, sliding key; 517, clamping ring; 61, first driving unit; 62, second driving unit; 63, third driving unit; 71, driving frame; 72, mechanical claw. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0033] The present application provides a double-mode casting machine as shown in Figures 1 to 9 The double-mode casting machine comprises a rack 1, and further comprises:

[0034] Two outer molds 2 are symmetrically arranged, and when the two outer molds 2 are closed, two casting cavities can be formed.

[0035] Two core mold assemblies 3 are arranged in the corresponding casting cavities respectively, and each core mold assembly 3 comprises a top mold 31 and two inner molds 32. After the top mold 31 and the two inner molds 32 are closed, they cooperate with the corresponding casting cavities to cast the casting. The middle part of the two casting cavities forms a pouring opening and a pouring channel. The raw material is poured from the pouring opening, and the raw material enters the casting cavity through the pouring channel, and is cast and formed in the middle part of the casting cavity and the core mold assembly 3. The pouring opening and the pouring channel are prior art, and will not be described here.

[0036] A cooling assembly 4 is arranged inside the core mold assembly 3, which is used for cooling the core mold assembly 3 to accelerate the cooling and forming of the casting during the casting process.

[0037] Specifically, the cooling assembly 4 comprises: an air channel 41 formed in the inside of the top die 31; a connecting rod 42 in a hollow structure, and the bottom end of the connecting rod 42 is slidingly arranged in the air channel 41, and the connecting rod 42 can continuously introduce gas into the air channel 41; a first gas flow channel 43 formed in the inside of the top die 31, and the top end of the first gas flow channel 43 penetrates to the outside of the top end of the top die 31, and the bottom end of the first gas flow channel 43 is in communication with the air channel 41; and a second gas flow channel 44 formed in the inside of the two inner dies 32.

[0038] It should be noted that when the top die 31 and the two inner dies 32 are closed, the first gas flow channel 43 and the two side second gas flow channels 44 are in communication and form a complete spiral gas flow channel, and after the gas is continuously introduced, the inner die 32 can be cooled.

[0039] During the casting process, the gas is continuously introduced into the air channel 41 through the hollow connecting rod 42, and the gas continuously passes through the spiral gas flow channel, so that the heat of the casting is taken away, and the inner die 32 and the casting can be quickly cooled, thereby achieving the effect of accelerating the cooling and forming of the casting.

[0040] The blowing assembly 5 is arranged above the top die 31 and is used for blowing and cleaning the outer wall of the casting cavity and the core die assembly 3.

[0041] Specifically, the blowing assembly 5 comprises a blowing groove 51 which is formed through the outside of the top die 31 and is in communication with the bottom of the air channel 41, and the gas in the air channel 41 can be blown outwards through the blowing groove 51 to blow the inside of the casting cavity.

[0042] During the descending process of the top die 31, the gas flowing through the air channel 41 can blow the inside of the two outer dies 2 through the blowing groove 51, so as to clean the dust and other impurities attached to the inside of the outer die 2, and ensure that the casting cavity is in a clean state during casting.

[0043] Meanwhile, the blowing assembly 5 further comprises: a plurality of sealing ring plates 52 which are arranged on the top of the top die 31 and the inner die 32, and when the top die 31 and the two inner dies 32 are closed, the plurality of sealing ring plates 52 cooperatively form a complete sealing ring; a sealing cover 53 which is rotatably arranged in the middle of the connecting rod 42 and is located above the top die 31, and the sealing cover 53 and the connecting rod 42 can only relatively rotate and cannot slide in the upward and downward directions, the inner diameter of the bottom of the sealing cover 53 is consistent with the outer diameter of the sealing ring, when the sealing cover 53 is lowered to be in close contact with the sealing ring, the part in contact with each other between the sealing cover 53 and the sealing ring is in a sealed state; a plurality of inclined flow holes 54 which are uniformly and circumferentially formed in the side wall of the sealing cover 53; and a first reset member 55 which is arranged between the groove bottom of the air channel 41 and the bottom end of the connecting rod 42 and can provide an upward thrust to the connecting rod 42.

[0044] After the casting is completed, before the outer mold 2 and the core mold assembly 3 are opened, the connecting rod 42 is controlled to further descend, so that the sealing cover 53 is sealed with the sealing ring, at this time, the gas carrying heat is blown out from the top end of the top mold 31 through the spiral airflow channel, so that the impurities on the top of the core mold assembly 3 are blown out through the inclined flow hole 54, the top of the core mold assembly 3 is cleaned by blowing, and in this process, the inclined flow hole 54 makes the gas blow out at an inclined angle, so as to drive the sealing cover 53 to continuously rotate.

[0045] At the same time, the blowing assembly 5 further comprises: a cutoff cover 56 fixedly arranged on the top of the sealing cover 53; a shielding ring 57 fixedly arranged on the outer side of the sealing cover 53, and the bottom of the shielding ring 57 and the inner side of the cutoff cover 56 are kept sealed; a piston ring 58 sealingly arranged between the cutoff cover 56 and the shielding ring 57 and capable of sliding up and down; a second elastic member 511 arranged between the bottom of the piston ring 58 and the shielding ring 57 and capable of providing an upward thrust to the piston ring 58; a plurality of connecting rods 512 fixedly arranged on the bottom of the piston ring 58, and the bottom ends of the connecting rods 512 penetrate below the shielding ring 57; and a flow guide ring 513 fixedly arranged on the bottom ends of the plurality of connecting rods 512, and a flexible flow guide layer 514 is fixedly arranged between the flow guide ring 513 and the outer side of the sealing cover 53.

[0046] It should be noted that the sealing cover 53, the cutoff cover 56, the shielding ring 57 and the piston ring 58 cooperatively form a closed chamber 59, and a plurality of through holes 510 are arranged on the sealing cover 53 and penetrate the sealing cover 53, and the through holes 510 are in communication with the closed chamber 59.

[0047] After the casting is completed, the sealing cover 53 and the sealing ring are still in the state of being sealed with each other, at this time, the outer mold 2 is opened, and the airflow pressure in the airflow channel 41 is increased, the airflow pressure in the closed chamber 59 entering through the through holes 510 is increased, and the piston ring 58 moves downward by overcoming the thrust of the second elastic member 511, the flow guide ring 513 is driven to move downward by the connecting rods 512, and finally the position of the flow guide ring 513 is lower than that of the inclined flow hole 54, in this process, the flexible flow guide layer 514 is deformed synchronously, the airflow blown out of the inclined flow hole 54 is guided, the airflow blown out of the inclined flow hole 54 changes from horizontal to inclined downward and blows to the outer side wall of the inner mold 32, so as to clean the outer side wall of the inner mold 32, and in this process, the sealing cover 53 is in a state of continuous rotation, so that the airflow can more uniformly and comprehensively blow to the outer side wall of the inner mold 32.

[0048] And, the side wall of the air channel 41 is provided with a sliding groove 515 penetrating to the top of the top die 31, the side wall of the connecting rod 42 is fixedly provided with a sliding key 516 located inside the sliding groove 515, and the top of the top die 31 is provided with a snap ring 517 fixed on the top of the top die 31 by means of bolt connection, which can limit the highest position of the sliding key 516 to prevent the connecting rod 42 from being pulled out of the air channel 41.

[0049] The driving system 6 is arranged on the top of the rack 1 and used to drive the opening / closing of the outer dies 2 and the inner die 32 and the lifting of the inner die 32 and the top die 31.

[0050] Specifically, the driving system 6 includes: two first driving units 61 symmetrically arranged on the top of the rack 1 and fixedly connected with the corresponding outer dies 2 at the driving end, used to drive the opening / closing of the outer dies 2, the first driving unit 61 can be a horizontally arranged air cylinder or hydraulic cylinder to drive the outer dies 2 in the horizontal direction; two second driving units 62 symmetrically arranged on the top of the rack 1 and fixedly connected with the corresponding inner die 32 at the driving end, used to drive the opening / closing and lifting of the inner die 32, the second driving unit 62 can be a horizontally arranged air cylinder to drive the inner die 32 in the horizontal direction and a vertically arranged air cylinder to drive the inner die 32 in the vertical direction; and a third driving unit 63 arranged on the top of the rack 1 and fixedly connected with the top end of the connecting rod 42 at the driving end, used to drive the lifting of the top die 31, the third driving unit 63 can be a vertically arranged air cylinder to drive the top die 31 in the vertical direction; the first driving unit 61, the second driving unit 62 and the third driving unit 63 are all prior art, and other driving modes except the above-mentioned air cylinders can also be adopted, which will not be described here.

[0051] The grabbing assembly 7 includes a driving frame 71 arranged on one side of the rack 1, and the bottom of the driving frame 71 is provided with a mechanical gripper 72, the driving frame 71 drives the mechanical gripper 72 to move to grab the castings after casting, and the driving frame 71 and the mechanical gripper 72 are both prior art, which will not be described here.

[0052] In summary, the use process of the casting machine is as follows:

[0053] Firstly, before the two outer dies 2 and the inner die 32 are closed, the top die 31 is lowered by the third driving unit 63, and the gas is continuously introduced into the air channel 41, which is continuously blown to the inner side of the two outer dies 2 through the blowing groove 51 during the lowering of the top die 31, until the top die 31 is lowered to the lowest position, and the gas continuously blown from the blowing groove 51 completes the overall blowing of the inner side of the two outer dies 2.

[0054] Subsequently, the inner mold 32 is first driven to descend by the second driving unit 62, and when the inner mold 32 descends to the lowest position, the inner mold 32 is horizontally moved and combined with the top mold 31, and when the inner mold 32 is combined with the top mold 31, the first gas flow channel 43 and the two side second gas flow channels 44 form a spiral gas flow channel, and at this time, the purge groove 51 is blocked by the inner side of the inner mold 32, and then the outer mold 2 is combined by the first driving unit 61, and the combining process of the outer mold 2 and the core mold assembly 3 is completed, and then casting is performed, and during the casting process, the gas is continuously blown into the gas channel 41, and since the purge groove 51 is blocked, the gas in the gas channel 41 will continuously flow in the spiral gas flow channel, so as to take away the heat transferred to the inner mold 32 during the casting process, and finally discharged from the top of the top mold 31, realizing the continuous and rapid cooling of the inner mold 32 and the casting, and at this time, the sealing cover 53 is at the initial height, that is, the sealing cover 53 has not contacted with the sealing ring, and there is a large gap between the sealing cover 53 and the sealing ring, and the gas discharged from the top of the top mold 31 can be quickly discharged to the outside through the gap, realizing the rapid discharge of the gas carrying heat.

[0055] After the casting is completed, the connecting rod 42 is further lowered by the third driving unit 63, and since the top mold 31 is at the lowest position at this time, the connecting rod 42 will slide downward along the gas channel 41, and simultaneously drive the sealing cover 53 to descend, so that the sealing cover 53 is in close contact with the sealing ring, and at this time, the gas blown from the spiral gas flow channel will be blown out at an inclined angle through the plurality of inclined flow holes 54, and at the same time, the impurities between the sealing cover 53 and the top of the core mold assembly 3 are brought out, realizing the blowing and cleaning of the top of the core mold assembly 3.

[0056] Subsequently, the outer mold 2 is driven to open by the first driving unit 61, and at the same time, the gas flow pressure into the gas channel 41 is increased, so that the flow guide ring 513 is lowered to a position lower than the inclined flow hole 54, and at the same time, the elastic flow guide layer 514 is deformed, and the gas flow blown from the inclined flow hole 54 is guided, so that the gas flow blown from the inclined flow hole 54 blows to the outer side wall of the inner mold 32, and moreover, the continuously rotating sealing cover 53 makes the gas flow more uniformly and comprehensively blow to the outer side wall of the inner mold 32.

[0057] Further, the control core module assembly 3 is in the closed die state, and the top end of the spiral air flow channel is blocked. At this time, after a certain amount of gas is introduced into the air duct 41, pressure maintaining operation is performed, so that the air duct 41 and the air flow pressure in the spiral air flow channel are at a constant value, and the air flow pressure value is monitored in real time. A gas pressure sensor can be provided at the air flow inlet. After waiting for a certain time, it is observed whether the air flow pressure value changes. If the air flow pressure value decreases, it indicates that the spiral air flow channel has a gas leakage phenomenon, and there is a problem of wear between the top die 31 and the inner die 32. The top die 31 or the inner die 32 should be checked and repaired in time to ensure the smooth progress of the casting work. If the air flow pressure value remains unchanged, it indicates that the top die 31 and the inner die 32 are in good condition.

[0058] Finally, it should be noted that the above description is only a preferred embodiment of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent replacements to some technical features, as long as they are within the spirit and principles of the present application. Any modification, equivalent replacement, improvement, etc. should be included in the protection scope of the present application.

Claims

1. A twin-mold casting machine comprising a frame, characterized in that, The outer mold is symmetrically provided with two, and two outer molds can form two casting cavities when they are closed; Two core mold assemblies are respectively arranged in the corresponding casting cavities, each core mold assembly includes a top mold and two inner molds, and the top mold and the two inner molds are matched with the corresponding casting cavities after being closed to cast the castings; A cooling assembly is arranged inside the core mold assembly to cool the core mold assembly to accelerate the cooling and forming of the castings during casting; It includes an air channel arranged in the inside of the top mold; a connecting rod arranged in a hollow structure, and the bottom end is arranged in the air channel, which can continuously introduce gas into the air channel; The blowing assembly is arranged above the top mold, which is used for blowing and cleaning the outer wall of the casting cavity and the core mold assembly; the blowing assembly includes a blowing groove which is arranged on the outside of the top mold and is connected with the bottom of the air channel, and the gas in the air channel can be blown out through the blowing groove to blow the casting cavity; further comprising: a plurality of sealing ring plates are arranged on the top of the top mold and the inner mold, and the top mold and the two inner molds are closed, and the plurality of sealing ring plates are matched to form a complete sealing ring; a sealing cover is rotatably arranged in the middle of the connecting rod and located above the top mold, the inner diameter of the bottom of the sealing cover is consistent with the outer diameter of the sealing ring; a plurality of inclined flow holes are uniformly arranged on the side wall of the sealing cover; a first reset member is arranged between the groove bottom of the air channel and the bottom end of the connecting rod, which can provide upward thrust to the connecting rod; A driving system is arranged on the top of the rack to drive the opening / closing of the outer mold and the inner mold and to drive the lifting of the inner mold and the top mold.

2. A twin mould casting machine according to claim 1, characterised in that: The cooling assembly includes: A first airflow channel is arranged in the inside of the top mold, and the top end of the first airflow channel penetrates to the outside of the top end of the top mold, and the bottom end of the first airflow channel is connected with the air channel; A second airflow channel is arranged in the inside of the two inner molds; After the top mold and the two inner molds are closed, the first airflow channel and the two side second airflow channels are connected to form a complete spiral airflow channel, and after the gas is continuously introduced, the inner mold can be cooled and cooled.

3. A twin mould casting machine according to claim 2, characterised in that: The blowing assembly further includes: A cutoff cover is fixedly arranged on the top of the sealing cover; A shielding ring is fixedly arranged on the outside of the sealing cover, and the bottom of the shielding ring and the inside of the cutoff cover are sealed; A piston ring is sealingly and slidingly arranged between the cutoff cover and the shielding ring, and can slide up and down; The sealing cover, the cutoff cover, the shielding ring and the piston ring form a closed chamber, and a plurality of through holes are arranged on the sealing cover, and the through holes are connected with the closed chamber; A second elastic member is arranged between the bottom of the piston ring and the shielding ring, which can provide upward thrust to the piston ring; A plurality of connecting rods are fixedly arranged on the bottom of the piston ring, and the bottom end of the connecting rod penetrates to the bottom of the shielding ring; A flow guide ring is fixedly arranged on the bottom end of the plurality of connecting rods, and an elastic flow guide layer is fixedly arranged between the flow guide ring and the outside of the sealing cover.

4. A twin mould casting machine according to claim 3, characterised in that: The side wall of the air passage is provided with a sliding groove penetrating to the top of the top die, and the side wall of the connecting rod is fixedly provided with a sliding key located in the sliding groove.

5. A twin mould casting machine according to claim 4, characterised in that: The driving system comprises: Two first driving units symmetrically arranged on the top of the frame and fixedly connected with the corresponding outer dies at the driving end for driving the opening / closing of the outer dies; Two second driving units symmetrically arranged on the top of the frame and fixedly connected with the corresponding inner dies at the driving end for driving the opening / closing and lifting of the inner dies; A third driving unit arranged on the top of the frame and fixedly connected with the top end of the connecting rod at the driving end for driving the lifting of the top die.

6. A twin mould casting machine according to claim 1, characterised in that: Further comprising a grabbing assembly comprising a driving frame arranged on one side of the frame, and a mechanical claw arranged at the bottom of the driving frame, the driving frame driving the movement of the mechanical claw to grab the castings after casting.

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