CN117428167A - Electric power metal hanging ring casting molding equipment and method - Google Patents

Abstract

The invention relates to a casting molding device and a method for an electric metal hanging ring, comprising a bottom plate, casting molds, a pressurizing assembly, a backflow cavity, a pressurizing valve, a pouring gate position and a lifting assembly, wherein a plurality of casting molds are uniformly arranged on the bottom plate along the circumferential direction of the bottom plate, the casting molds are formed by combining an upper mold and a lower mold, the pressurizing assembly is in one-to-one corresponding fit connection with the upper mold, the pressurizing assembly is used for re-extruding and backflow of metal melt overflowed into the backflow cavity formed by the upper mold into the casting cavity of the casting mold, the pressurizing valve is assembled on one side, close to the center of the bottom plate, of the pressurizing assembly, a blocking station for blocking the pouring gate position of the upper mold and a pushing station for pushing the metal melt in the pouring gate position into the casting cavity are arranged in the descending process of the pressurizing valve, so that the metal melt in the casting cavity reaches an overflow state, and the lifting assembly arranged at the center of the bottom plate controls the upper mold to ascend and be demoulded with the lower mold.

Description

Electric power metal hanging ring casting molding equipment and method

Technical Field

The application relates to the technical field of casting molding, in particular to a casting molding device and a casting molding method for an electric metal hanging ring.

Background

The casting is a technological process of smelting metal into liquid meeting certain requirement, pouring the liquid into casting mould, cooling, solidifying and cleaning to obtain the casting with preset shape, size and performance. Casting is one of the basic processes of the modern manufacturing industry, wherein the power metal hanging ring is also usually manufactured by casting forming, and the existing power metal hanging ring is mainly used for connecting, hanging and supporting wires or insulator strings of a power line, so that the safe operation and stability of the power line are ensured.

In the casting and forming process of the electric power metal hanging ring, for example, chinese patent with the publication number CN112355243B discloses a casting and forming method of a high-voltage electric power net rack-arranged electric power fitting.

In the casting and forming process disclosed above, molten cast iron is mainly led between the first module, the second module and the fixing rod after being spliced, and then cooling and forming are waited, but the conveying difficulty of molten cast iron in the actual conveying process is not considered, even if the cast iron is in a molten state after being molten, the fluidity of the cast iron is in a slower state, the cast iron is input into a casting cavity and is difficult to fill all positions in the casting cavity in time, and as the injection quantity of the melt is equal to the filling quantity in the casting cavity, no redundant space exists for injecting the melt in advance, so that the situation that the melt which is already injected into the casting cavity (at the moment, the melt cannot permeate into all positions in time) blocks the subsequent injection can occur in the later stage of single injection, the injection quantity is less than a preset value, and finally the situation that the edge of a formed workpiece is caused.

Based on this, there is room for improvement over the conventional casting.

Disclosure of Invention

In order to enable a predetermined amount of metal melt to be entirely injected into the casting cavity and to form an overflow state inside the casting cavity, the present application provides an electric metal hanger cast molding apparatus and method.

In a first aspect, the application provides an electric power metal hanging ring casting molding device which adopts the following technical scheme:

the utility model provides an electric power metal link casting former, includes bottom plate, casting mould, pressurization subassembly, backward flow chamber, pressurization valve, runner position, lifting unit, and wherein the bottom plate is fixed basis, for ground or platform are fixed, evenly is provided with a plurality of casting moulds along its circumference on the bottom plate, and the casting mould is by last mould, lower mould upper and lower combination constitution, the pressurization subassembly with go up mould one-to-one cooperation is connected, the pressurization subassembly is arranged in the metal melt that will overflow to the backward flow chamber that the last mould offered and extrudees the backward flow again in the casting chamber of casting mould, and the pressurization valve is assembled to the one side that the pressurization subassembly is close to the bottom plate center, the in-process of the decline of pressurization valve has the jam station that cuts off last mould runner position and pushes away the metal melt in the runner position to the promotion station in the casting chamber for metal melt in the casting chamber reaches the state of filling, installs the lifting unit control at bottom plate central point and goes up the mould, makes it and the lower mould drawing of patterns.

According to the method, the preset amount of metal melt is firstly injected into the cavity structure (the backflow cavity and the casting cavity) of the expansion cavity, then the metal melt in the backflow cavity is returned to the casting cavity in a cavity recovery mode (the backflow cavity is closed), the metal melt in the gate position is pushed into the casting cavity in a pushing-out mode until the metal melt is in a overflowing state, the casting forming efficiency is improved, and the defect of the corner position structure is avoided.

As a preferable technical scheme of the invention, a hidden groove is formed at the lower end of the lower die, a sliding plate is arranged in the hidden groove in a vertical sliding manner, a connecting spring is connected between the lower surface of the sliding plate and the bottom of the hidden groove, a middle core die is arranged on a part of the sliding plate far away from the lifting assembly, the middle core die penetrates through the casting cavity, a top supporting piece is arranged on the upper surface of the sliding plate, and the upper surface of the top supporting piece and the lower surface of the casting cavity form a complete cavity surface structure.

As a preferable technical scheme of the invention, the pressurizing assembly comprises a pushing piece, wherein the pushing piece is connected in the backflow cavity in an up-down sliding way, and a trigger piece is arranged at the rear side of the upper surface of the pushing piece; the power supply unit is arranged on the upper surface of the upper die, the positions of the switch pieces exposed out of the lower surface of the power supply unit correspond to the positions of the trigger pieces one by one, and when the trigger pieces rise to the highest positions, the trigger pieces are contacted with the switch pieces so that the switch pieces are in a closed state; the electric push rod is arranged in the heat insulation chamber formed in the upper die, the electric push rod is electrically connected with the power supply group, and a linkage rod for driving the push rod to lift is arranged at the ejection end of the electric push rod.

As a preferable technical scheme of the invention, the upper end of the backflow cavity is provided with a limiting block, and the limiting block limits the ascending height of the pushing piece.

As a preferred embodiment of the present invention, the pressurizing valve includes an adapter tube fixedly connected between the gate position and a delivery assembly mounted on the bottom plate, the delivery assembly being for delivering the metal melt into the casting cavity; the sealing piece is arranged on the lower side of the inside of the connecting pipe in a vertical sliding way, and a return spring is connected between the lower surface of the sealing piece and the bottom of the connecting pipe; the partition frame is arranged at the middle upper part of the connecting pipe in a vertical sliding way, and can partition the inside of the connecting pipe when the partition frame moves to a blocking station; the pushing-out piece is arranged in the partition frame, the piston part is arranged on the upper surface of the partition frame, the piston part and the pushing-out piece are in communication, when the piston part moves to the pushing station, the pushing-out piece pushes the metal melt in the pouring gate position into the casting cavity, and the upper end of the piston part is connected with the linkage rod through the connecting seat.

As a preferred technical solution of the invention, a limiting member is provided below the closing member, and the limiting member for limiting the lowering height of the closing member is mounted on the inner side wall of the adapter tube.

As an optimized technical scheme of the invention, a limiting slide rail is arranged on one side wall of the partition frame, which is close to the lifting assembly, and a connecting block which is in sliding connection with the limiting slide rail is fixedly arranged on the inner side wall of the connecting pipe, and the limiting slide rail is used for limiting the lifting height of the partition frame.

As a preferable technical scheme of the invention, the pushing-out piece comprises an inflating piece and a pushing-out plate, wherein the inflating piece is formed by sleeving a plurality of sections of cylinders, the inside of the inflating piece is in a ventilation state, one end of the inflating piece, which is far away from a pouring gate, is arranged on the inner side wall of the partition frame, and the pushing-out plate is arranged at the other end of the inflating piece.

As a preferable technical scheme of the invention, the piston part comprises a connecting cylinder, and the lower end of the connecting cylinder is connected with the upper surface of the partition frame; the piston piece, its upper and lower slip setting is in the inside of connecting cylinder, is connected with built-in spring between the upper surface of piston piece and the top of connecting cylinder, and built-in spring keeps upwards pulling the trend to the piston piece all the time, and the upper end and the connecting seat of piston piece are connected for limit for the height of lifting up of piston piece limit the high piece and install on the inside wall of connecting cylinder.

In another aspect, the present application provides a method for casting and forming a power metal suspension loop, the method comprising the steps of:

s1, pressurizing and injecting a metal melt into a casting cavity;

s2, part of the metal melt enters a backflow cavity, then a pressurizing assembly is triggered to enable the metal melt in the backflow cavity to flow back into a casting cavity, meanwhile, a gate position is blocked through a pressurizing valve, the metal melt in the gate position is pushed into the casting cavity, and at the moment, the metal melt in the casting cavity is in an overflow state;

s3, standing, cooling and forming;

s4, controlling the upper die to ascend through the lifting assembly, and demolding the upper die and the lower die;

s5, taking out the formed metal hanging ring workpiece.

In the technical scheme, the electric metal hanging ring casting molding equipment provided by the invention has the advantages that the metal melt is firstly injected into the cavity structure (the backflow cavity and the casting cavity) of the cavity expansion, the injection space is enlarged in the cavity expansion mode, the metal melt with low fluidity is fully introduced into the space in the cavity structure, then the metal melt in the backflow cavity is reflowed into the casting cavity in the cavity recovery mode (the backflow cavity is closed), the gate position is blocked (backflow is prevented), and then the metal melt in the gate position is pushed into the casting cavity in the piston pushing mode, so that the casting cavity is in an overflow state, the casting molding efficiency is improved, and the condition of corner position structure loss is avoided.

Drawings

Fig. 1 is a schematic structural view of the present application.

Fig. 2 is a top view of the present application.

Fig. 3 is a cross-sectional view A-A of fig. 2 of the present application.

FIG. 4 is a schematic view of a first partial structure of the present application between a base plate, casting mold, pressurization assembly, reflow chamber, pressurization valve, gate location.

FIG. 5 is a schematic view of a second partial structure of the present application between a base plate, casting mold, pressurization assembly, reflow chamber, pressurization valve, gate location.

Fig. 6 is a partial enlarged view at X of fig. 3 of the present application.

Fig. 7 is a partial enlarged view at Y of fig. 5 of the present application.

Fig. 8 is a schematic structural view of a power metal suspension loop.

Reference numerals illustrate: 1. a bottom plate; 2. casting a mold; 3. a pressurizing assembly; 4. a reflow chamber; 5. a pressurization valve; 6. a gate position; 7. a lifting assembly; 8. a sliding plate; 9. a core mold; 10. a limiting block; 11. a transport assembly; 31. a pushing member; 32. a power supply group; 33. an electric push rod; 34. a push rod; 35. a linkage rod; 51. a connecting pipe; 52. a closure; 53. a partition frame; 54. a push-out member; 55. a piston section; 541. an inflatable member; 542. a push-out plate; 551. a connecting cylinder; 552. a piston member.

Detailed Description

The present application is described in further detail below in conjunction with figures 1-8.

The embodiment of the application discloses electric power metal link casting molding equipment and method, when injecting metal melt into the casting cavity, firstly, the whole amount of metal melt is injected in a cavity expanding mode, and then the metal melt is all injected into the casting cavity through a cavity recovery mode and the melt pushing out of the inside of the gate position 6, so that the casting cavity is in an overflow state, and the actual injection amount is ensured to be equal to the preset injection amount.

Referring to fig. 1-3, the disclosed electric metal hanging ring casting molding device comprises a bottom plate 1, a casting mold 2, a pressurizing assembly 3, a backflow cavity 4, a pressurizing valve 5, a gate position 6 and a lifting assembly 7, wherein the bottom plate 1 is fixed relative to the ground or a platform, a plurality of casting molds 2 are uniformly arranged on the bottom plate 1 along the circumferential direction of the bottom plate, the casting molds 2 are composed of an upper mold and a lower mold in an up-down combination manner, the pressurizing assembly 3 is in one-to-one corresponding fit connection with the upper mold, the pressurizing assembly 3 is used for re-extruding and backflow of metal melt overflowed into the backflow cavity 4 formed by the upper mold into the casting cavity of the casting mold 2, the pressurizing valve 5 is assembled on one side, close to the center of the bottom plate 1, of the pressurizing valve 5 is provided with a blocking station for blocking the gate position 6 of the upper mold and a pushing station for pushing the metal melt in the gate position 6 into the casting cavity in the descending process, so that the metal melt in the casting cavity reaches an overflow state, and the lifting assembly 7 arranged in the center position of the bottom plate 1 is used for controlling the ascending mold to be in a demoulding state with the lower mold.

In the actual casting and forming process of the electric metal hanging ring, firstly, metal melt is pressurized and injected into a casting cavity, in the pressurizing and injecting process, because the injection quantity of the metal melt is equal to the filling quantity in the casting cavity, but because the molten state of the metal melt is difficult to fill all positions in the casting cavity in time, the metal melt in the casting cavity is in an overflow state (the actual filling quantity is equal to the preset filling quantity), then the upper die is controlled to be lifted by a lifting component 7 to be in a mold with an under-die, along with the increase of the metal melt in the reflow cavity 4, when the maximum value is reached, a pressurizing component 3 is triggered to push down the metal melt in the reflow cavity 4 to enable the metal melt to flow into the casting cavity, meanwhile, the pressurizing valve 5 is used for plugging the pouring gate position 6 and pushing the metal melt in the pouring gate position into the casting cavity, when the metal melt in the reflow cavity 4 and the pouring gate position 6 are extruded into the casting cavity, the metal melt in the overflow state (the actual filling quantity is equal to the preset filling quantity), then the lifting component 7 is controlled to be lifted up with the lower die, finally, the formed metal hanging ring workpiece is taken out, the metal melt is pushed out of the casting cavity is finally, the casting cavity is pushed out of the casting cavity through the pouring gate position 4, and the casting cavity is restored to the reflow cavity is prevented from being in the reflow cavity by the pouring position 4, and the pouring cavity is in the pouring cavity.

Referring to fig. 3 and 5, because the structure and the volume of the electric power metal hanging ring (workpiece) are smaller, after the upper die and the lower die are separated (demolding), the workpiece possibly has a condition that the workpiece is difficult to take out, the application is in the lower end of the lower die, a hidden groove is formed in the lower end of the lower die, a sliding plate 8 is arranged in the hidden groove in a sliding manner, a connecting spring is connected between the lower surface of the sliding plate 8 and the bottom of the hidden groove, the connecting spring always keeps the trend of pushing the sliding plate 8 upwards, a middle core die 9 is arranged on the part of the sliding plate 8 far away from the lifting assembly 7, the middle core die 9 penetrates through a casting cavity, a top supporting piece is arranged on the upper surface of the sliding plate 8, the upper surface of the top supporting piece and the lower surface of the casting cavity form a complete cavity surface structure, the condition of a convex point cannot occur, and the integrity of the inner surface of the original casting cavity is guaranteed.

In the actual demolding process, after the upper die and the lower die are separated, the sliding plate 8 drives the jacking piece to ascend under the action of the connecting spring, so that a workpiece embedded in the lower die is jacked upwards, and the difficulty of taking the workpiece is reduced.

Referring to fig. 4 and 5, in order to monitor the amount of molten metal in the reflow chamber 4 and perform subsequent reflow discharge, the application is provided with a pressurizing assembly 3, specifically, the pressurizing assembly 3 includes a pushing member 31, a power supply group 32, an electric push rod 33, a push rod 34 and a linkage rod 35, the pushing member 31 is connected in the reflow chamber 4 in a sliding manner up and down, a trigger piece is arranged at the rear side of the upper surface of the pushing member 31, the power supply group 32 is arranged on the upper surface of an upper die, a power supply is built in the power supply group 32, the exposed switch piece at the lower surface of the power supply group 32 corresponds to the position of the trigger piece one by one, the switch piece is in a closed state due to contact with the switch piece when the trigger piece rises to the highest position, the switch piece is a delay switch, the electric push rod 33 can drive the linkage rod 35 to complete a complete first descent, the action of waiting for a period of time is achieved, the electric push rod 33 is arranged in a heat insulation chamber formed by the upper die, the electric push rod 33 is electrically connected with the power supply group 32, the ejection end of the electric push rod 33 is provided with the push rod 35 driving the push rod 34 to lift, the upper end of the push rod 4 is provided with a limit block 10, and the limit block 10 is arranged at the upper end of the reflow chamber 4, and the limit block 10 is limited by the limit block 10.

In the actual process of monitoring the metal melt quantity in the reflow chamber 4, the level of the metal melt injected into the casting chamber is gradually increased along with the increase of the injection quantity, and because the injection speed is higher, the metal melt is difficult to fully fill the injected area, so that the actual level is higher than a preset value, part of the metal melt can enter the reflow chamber 4, at the moment, the pushing piece 31 in the reflow chamber 4 rises, when the pushing piece 31 reaches the highest position, the triggering piece on the pushing piece 31 presses the switch piece to enable the switch piece to be in a closed state, at the moment, the power supply group 32 and the electric push rod 33 form a passage, the electrified electric push rod 33 drives the pushing rod 34 and the linkage rod 35 to integrally descend, and the descending pushing rod 34 pushes the pushing piece 31 to descend until the metal melt in the reflow chamber 4 is completely pushed into the casting chamber.

Referring to fig. 4, 6 and 7, when the metal melt in the reflow chamber 4 is extruded, the injection amount of the metal melt is completely injected at this time, in order to ensure that the backflow of the injected metal melt occurs and the metal melt in the gate position 6 is pushed into the casting chamber, the application is provided with a pressurizing valve 5 with a specific structure, specifically, the pressurizing valve 5 comprises a connecting pipe 51, a closing member 52, a partition frame 53, a push-out member 54 and a piston part 55, the connecting pipe 51 is fixedly connected between the gate position 6 and the conveying assembly 11, the conveying assembly 11 is mounted on the bottom plate 1, the conveying assembly 11 is used for conveying the metal melt into the casting chamber, the closing member 52 is arranged on the lower side of the inside of the connecting pipe 51 in a sliding manner, a reset spring is connected between the lower surface of the closing member 52 and the bottom of the connecting pipe 51, the reset spring is equal to the height of the lower end of the connecting pipe 51 when the reset spring is in a natural state, the reset spring always keeps the trend of pushing up the closing member 52, but the maximum height of the partition frame 53 is equal to the height of the lower end of the connecting pipe 51, the partition frame 53 is arranged on the upper and lower side of the connecting pipe, the partition frame 53 is in a sliding manner of the upper and lower side of the connecting member 55 is arranged on the piston part 55, and the piston part 55 can be pushed out of the piston part 55 is connected to the piston part 55 through the piston part 55 and the piston part 55 to the piston part 55 when the piston part 55 is mounted on the upper and the position 55 and the piston part 55 is connected to the position 55 in the position 55, which can move position 55 to the position 55 inside the connecting frame and the connecting frame 55, and the position 55 is mounted on the position 55 inside the connecting frame. A stopper for limiting the lowering height of the closure 52 is provided below the closure 52, and is mounted on the inner side wall of the adapter tube 51. A limiting sliding rail is arranged on one side wall of the partition frame 53, which is close to the lifting assembly 7, and a connecting block which is in sliding connection with the limiting sliding rail is fixedly arranged on the inner side wall of the connecting pipe 51, and the limiting sliding rail is used for limiting the lifting height of the partition frame 53.

In the actual implementation process, when the movable push rod 33 drives the linkage rod 35 to descend, the piston part 55 is synchronously driven to descend, the push-out piece 54 and the partition frame 53 are integrally descended, after the partition frame 53 descends to a designated position (at the moment, the push-out piece 54 is in an aligned state with the gate position 6), the descent is stopped (at a blocking station), at the moment, the partition frame 53 blocks the inside of the connecting pipe 51, the piston part 55 descends independently, and in the independent descending process, the push-out piece 54 is outwards extended through the conveying of gas, so that the metal melt in the gate position 6 is completely pushed into a casting cavity, and the situation of 'shortage of weight and two' of the metal melt in the casting cavity is avoided, so that the clearance of a gap at the edge position is caused.

Referring to fig. 6, in the present application, in a movement mode in which the piston portion 55 descends, the ejector 54 and the partition frame 53 descend integrally, and then the piston portion 55 descends alone, the ejector 54 includes an inflator 541 and an ejector plate 542, the inflator 541 is formed by sleeving a plurality of cylinders with a sliding member, the inside of the inflator 541 is in a ventilation state, one end of the inflator 541 away from the gate position 6 is mounted on the inner side wall of the partition frame 53, and the ejector plate 542 is mounted at the other end of the inflator 541.

Referring to fig. 6 and 7, the piston 55 includes a connecting cylinder 551 and a piston member 552, the lower end of the connecting cylinder 551 is connected to the upper surface of the partition frame 53, the piston member 552 is disposed inside the connecting cylinder 551 in a vertically sliding manner, a built-in spring is connected between the upper surface of the piston member 552 and the top of the connecting cylinder 551, the built-in spring always maintains a trend of pulling the piston member 552 upwards, the upper end of the piston member 552 is connected to a connecting seat, a height limiting block for limiting the lifting height of the piston member 552 is mounted on the inner side wall of the connecting cylinder 551, the amount of gas between the push-out member 54 and the piston 55 is constant, and when the piston member 552 is lifted back to the initial height, the push-out plate 542 can be retracted and stored.

In the actual moving process, in the middle-front lowering process of the linkage rod 35, since the push-out plate 542 is blocked by the inner wall of the connecting tube 51 and cannot extend outwards, at this time, the gas storage conditions inside the inflating member 541 and the piston portion 55 are kept unchanged, so that the piston portion 55 can only be driven to descend, the push-out member 54 and the partition frame 53 are lowered integrally, when the partition frame 53 descends to a designated position, the push-out plate 542 is aligned with the gate position 6, the partition frame 53 is difficult to descend under the support of the closing member 52 and the limiting member, at this time, the piston member 552 can only be driven to descend independently, the gas in the connecting tube 551 is conveyed to the inflating member 541 by the piston member 552, so that the push-out plate 542 is pushed into the gate position 6, and then the metal melt in the gate position 6 is pushed into the casting cavity, and when the piston member 552 descends to the lowest position (pushing station), the metal melt in the gate position 6 is pushed out completely.

Finally, referring to fig. 8, the application also discloses a casting forming method of the electric metal hanging ring, which specifically comprises the following steps:

s1, pressurizing and injecting a metal melt into a casting cavity;

s2, part of the metal melt enters a backflow cavity 4, then a pressurizing assembly 3 is triggered to enable the metal melt in the backflow cavity 4 to flow back into a casting cavity, meanwhile, a pouring gate position 6 is blocked through a pressurizing valve 5, the metal melt in the pouring gate position is pushed into the casting cavity, and the metal melt in the casting cavity is in an overflow state;

s3, standing, cooling and forming;

s4, controlling the upper die to ascend through the lifting assembly 7 so as to be demolded with the lower die;

s5, taking out the formed metal hanging ring workpiece.

The embodiments of the present invention are all preferred embodiments of the present invention, and are not intended to limit the scope of the present invention in this way, therefore: all equivalent changes in structure, shape and principle of the invention should be covered in the scope of protection of the invention.

Claims (10)

1. An electric metal suspension loop casting molding apparatus, comprising:

a plurality of casting molds (2) are uniformly arranged on the bottom plate (1) along the circumferential direction of the bottom plate, and the casting molds (2) are formed by combining an upper mold and a lower mold up and down;

the pressurizing assemblies (3) are in one-to-one corresponding fit connection with the upper dies, and the pressurizing assemblies (3) are used for re-extruding and refluxing the metal melt which overflows into a reflux cavity (4) formed in the upper dies into a casting cavity of the casting die (2);

a pressurizing valve (5) which is assembled on one side of the pressurizing assembly (3) close to the center of the bottom plate (1), wherein the pressurizing valve (5) is provided with a blocking station for blocking the pouring gate position (6) of the upper die and a pushing station for pushing the metal melt in the pouring gate position (6) into the casting cavity during the descending process, so that the metal melt in the casting cavity reaches an overflow state;

and the lifting assembly (7) is arranged at the center of the bottom plate (1), and the lifting assembly (7) controls the upper die to lift so as to be demolded with the lower die.

2. The power metal suspension loop casting molding apparatus as claimed in claim 1, wherein: the lower extreme of bed die has seted up hidden groove, and it is provided with sliding plate (8) to slide from top to bottom in the hidden groove, is connected with connecting spring between the lower surface of sliding plate (8) and the bottom in hidden groove, and well mandrel (9) are installed to the part that lifting assembly (7) were kept away from to sliding plate (8), and well mandrel (9) run through in the casting chamber, and the upper surface of sliding plate (8) is provided with the top support piece, and the upper surface of top support piece constitutes complete chamber face structure with the lower surface in casting chamber.

3. The power metal suspension loop casting molding apparatus as claimed in claim 1, wherein: the pressurizing assembly (3) comprises:

the pushing piece (31) is connected in the backflow cavity (4) in an up-down sliding way, and a trigger piece is arranged on the rear side of the upper surface of the pushing piece (31);

the power supply groups (32) are arranged on the upper surface of the upper die, the positions of the switch pieces exposed out of the lower surface of the power supply groups (32) are in one-to-one correspondence with the positions of the trigger pieces, and when the trigger pieces rise to the highest positions, the trigger pieces are contacted with the switch pieces so that the switch pieces are in a closed state;

the electric push rod (33) is arranged in the heat insulation chamber formed in the upper die, the electric push rod (33) is electrically connected with the power supply group (32), and a linkage rod (35) for driving the push rod (34) to lift is arranged at the ejection end of the electric push rod (33).

4. A power metal suspension loop casting apparatus as claimed in claim 3 wherein: the upper end of the backflow cavity (4) is provided with a limiting block (10), and the limiting block (10) limits the rising height of the pushing piece (31).

5. A power metal suspension loop casting apparatus as claimed in claim 3 wherein: the pressurization valve (5) comprises:

a connecting pipe (51) fixedly connected between the pouring gate position (6) and a conveying component (11), wherein the conveying component (11) is arranged on the bottom plate (1), and the conveying component (11) is used for conveying the metal melt into the casting cavity;

the sealing piece (52) is arranged on the lower side of the inside of the connecting pipe (51) in a vertical sliding way, and a return spring is connected between the lower surface of the sealing piece (52) and the bottom of the connecting pipe (51);

a partition frame (53) which is provided at the upper and lower parts of the joint pipe (51) in a sliding manner, and which can partition the interior of the joint pipe (51) when the partition frame (53) moves to a blocking position;

the pushing-out piece (54) is arranged in the partition frame (53), a piston part (55) is arranged on the upper surface of the partition frame (53), the piston part (55) and the pushing-out piece (54) are in communication, when the piston part (55) moves to a pushing station, the pushing-out piece (54) pushes molten metal in the pouring gate position (6) into the casting cavity, and the upper end of the piston part (55) is connected with the linkage rod (35) through a connecting seat.

6. The power metal suspension loop casting molding apparatus as claimed in claim 5, wherein: a limiting piece is arranged below the sealing piece (52), and the limiting piece for limiting the descending height of the sealing piece (52) is arranged on the inner side wall of the connecting pipe (51).

7. The power metal suspension loop casting molding apparatus as claimed in claim 5, wherein: a limiting sliding rail is arranged on one side wall of the partition frame (53) close to the lifting assembly (7), a connecting block which is in sliding connection with the limiting sliding rail is fixedly arranged on the inner side wall of the connecting pipe (51), and the limiting sliding rail is used for limiting the lifting height of the partition frame (53).

8. The power metal suspension loop casting molding apparatus as claimed in claim 5, wherein: the pushing-out piece (54) comprises an inflating piece (541) and a pushing-out plate (542), the inflating piece (541) is formed by sleeving a plurality of sections of cylinders in a sliding mode, the inside of the inflating piece (541) is in a ventilation state, one end, away from a pouring gate position (6), of the inflating piece (541) is arranged on the inner side wall of the partition frame (53), and the pushing-out plate (542) is arranged at the other end of the inflating piece (541).

9. The power metal suspension loop casting molding apparatus as claimed in claim 5, wherein: the piston portion (55) includes:

a connecting cylinder (551) the lower end of which is connected to the upper surface of the partition frame (53);

the piston piece (552) slides from top to bottom and sets up the inside at connecting cylinder (551), is connected with built-in spring between the top of piston piece (552) and connecting cylinder (551), and built-in spring keeps upwards pulling trend to piston piece (552) all the time, and the upper end and the connecting seat of piston piece (552) are connected for limit up the limit for height piece of rising of piston piece (552) is installed on the inside wall of connecting cylinder (551).

10. A method of casting a power metal suspension loop, which is realized by the apparatus for casting a power metal suspension loop according to any one of claims 1 to 9, comprising the steps of:

s1, pressurizing and injecting a metal melt into a casting cavity;

s2, part of metal melt enters a backflow cavity (4), then a pressurizing assembly (3) is triggered to enable the metal melt in the backflow cavity (4) to flow back into a casting cavity, meanwhile, a pouring gate position (6) is blocked through a pressurizing valve (5) and the metal melt in the pouring gate position is pushed into the casting cavity, and at the moment, the metal melt in the casting cavity is in an overflow state;

s3, standing, cooling and forming;

s4, controlling the upper die to ascend through a lifting assembly (7) so as to be demolded with the lower die;

s5, taking out the formed metal hanging ring workpiece.