Die pressing device for air inlet ring of fan

Abstract

The invention relates to the technical field of air inlet ring pressing, in particular to a fan air inlet ring pressing die device which comprises a U-shaped plate, a pressing mechanism for pressing a fan air inlet ring is arranged on the U-shaped plate, the pressing mechanism comprises two lower dies, and pressing grooves are formed in the upper ends of the lower dies; and the discharging mechanism comprises a rotating ring rotationally connected to the upper surface of the U-shaped plate, an annular frame is fixedly connected to the upper end of the rotating ring, and two hollow rods are rotationally connected to the two opposite inner walls of the annular frame correspondingly. By arranging the discharging mechanism, an air inlet ring formed in the pressing groove in a pressing mode can be poured out, in the rotating process of the annular frame, a welded conical cylinder which is not pressed and located in the pressing groove can be conveyed to the position under the upper die to wait for pressing, meanwhile, by arranging the air blowing mechanism, on one hand, air can be blown to the air inlet ring, falling of the air inlet ring is accelerated, and on the other hand, the pressing effect is improved. On the other hand, the interior of the pressing groove can be cleaned.

Description

Technical Field

[0001] The invention relates to the technical field of air inlet ring pressing, and in particular to a die pressing device for an air inlet ring of a fan. Background Art

[0002] In the patent "A centrifugal fan air inlet ring die pressing device" with publication number "CN106077204B", the solution is to place the welded cone on the lower die frame groove, operate the first and second hydraulic cylinders to drive the lifting shaft to press the moving crossbeam downward, and the guide block group cooperates with the guide column and the connecting guide column to guide to ensure the coaxiality of the downward pressure. The die core and the groove are pressed together to complete the flange bending and taper correction of the cone. After the workpiece is inspected and qualified, it enters the rolling process of the roller press to complete the processing of the air inlet ring concave arc. However, this solution still has shortcomings:

[0003] After the air inlet ring is pressed and formed, the staff needs to take it out before the next pressing can be carried out. This method undoubtedly increases the pressing time of the air inlet ring, and after pressing and forming, there may be debris generated after pressing and forming in the pressing groove, resulting in the presence of debris affecting the subsequent pressing and forming quality of the air inlet ring. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems existing in the prior art and to propose a blower air inlet ring die pressing device.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A blower air inlet ring die pressing device, comprising:

[0007] A U-shaped plate, wherein a pressing mechanism for pressing the air inlet ring of the fan is provided on the U-shaped plate, the pressing mechanism comprising two lower molds, and a pressing groove is provided on the upper end of the lower mold;

[0008] The blanking mechanism includes a rotating ring rotatably connected to the upper surface of the C-shaped plate, the upper end of the rotating ring is fixedly connected to an annular frame, the two opposite inner walls of the annular frame are rotatably connected to two hollow rods, the side walls of the two hollow rods are respectively fixedly connected to the side walls of the two lower molds, the upper surface of the C-shaped plate is fixedly connected to an arc-shaped tooth plate, the side walls of the hollow rods are fixedly connected to a helical gear meshing with the arc-shaped tooth plate, and the upper end of the C-shaped plate away from the arc-shaped tooth plate is fixedly connected to an arc plate that fits the lower ends of the two lower molds;

[0009] The blowing mechanism includes a cavity opened in the lower mold, a plurality of first blowing holes connected to the bottom of the pressing groove are opened at the top of the cavity, a plurality of second blowing holes connected to the inner wall of the pressing groove are opened at the top of the cavity, and the second blowing holes are arranged obliquely upward away from the inner wall of the cavity.

[0010] Preferably, the air blowing mechanism further includes a circular ring fixedly connected to the inner wall of the annular frame through a bracket. An air inlet pipe is hermetically and rotatably connected to the inner wall of the circular ring. Two arc-shaped grooves corresponding to the two hollow rods are formed in the inner wall of the circular ring. One end of the hollow rod away from the lower mold penetrates through the side wall of the circular ring and extends into the arc-shaped groove. The side wall of the hollow rod is hermetically and rotatably connected to the side wall of the circular ring. An air outlet groove matching the arc-shaped groove is formed in the inner wall of the air inlet pipe. The side wall of the air inlet pipe is fixedly connected to the side wall of the U-shaped plate. The hollow rod is communicated with the inner wall of the cavity through an air inlet mechanism.

[0011] Preferably, it further includes a knocking mechanism. The knocking mechanism includes two grooves respectively formed in the opposite side walls of the lower mold. A first plate is slidably connected to the inner wall of the groove. The inner wall of the groove is elastically connected to the side wall of the first plate through a first spring. A plurality of knocking rods are fixedly connected to the side wall of the first plate close to the first spring. A cross bar is rotatably connected to the inner wall of the groove. A plurality of cams are fixedly connected to the side wall of the cross bar.

[0012] Preferably, the air inlet mechanism includes two hollow circular plates fixedly connected to the side wall of the lower mold. The two hollow circular plates correspond to the two grooves respectively. One end of the cross bar penetrates through the side wall of the hollow circular plate and extends into its interior. The side wall of the cross bar is hermetically and rotatably connected to the side wall of the hollow circular plate. A plurality of impellers are fixedly connected to the side wall of the cross bar located inside the hollow circular plate. The side wall of the hollow rod is communicated with the upper part of the inner wall of the hollow circular plate through a first pipe, and the pipe orifice of the first pipe located inside the hollow circular plate is inclined towards the impeller. The bottom of the hollow circular plate is communicated with the inner wall of the cavity through a second pipe.

[0013] Preferably, the included angle between two adjacent cams is 90°.

[0014] Preferably, the pressing mechanism further includes two hydraulic cylinders fixedly connected to the upper end of the U-shaped plate. A second plate is fixedly connected to the lower ends of the two hydraulic cylinders. An upper mold is fixedly connected to the lower end of the second plate.

[0015] Preferably, a rotating mechanism for driving the annular frame to rotate is provided on the U-shaped plate. The rotating mechanism includes a one-way bearing. A cylinder is fixedly connected to the upper end of the annular frame. The side wall of the cylinder is rotatably connected to the side wall of the U-shaped plate. A threaded sleeve is rotatably connected to the upper end of the U-shaped plate. The side wall of the threaded sleeve is fixedly connected to the inner ring of the one-way bearing. The outer ring of the one-way bearing is fixedly connected to a first gear. A second gear meshing with the first gear is fixedly connected to the side wall of the cylinder. The lower surface of the U-shaped plate is elastically connected to a third plate through a plurality of second springs. A来福杆 (it seems there is a wrong term here, maybe it should be a specific component name) is fixedly connected to the upper end of the third plate. The inner wall of the threaded sleeve is threadedly connected to the inner wall of the来福杆. A plurality of sliding rods are fixedly connected to the lower end of the third plate. The side wall of the second plate is slidably connected to the side walls of the plurality of sliding rods.

[0016] Compared with the existing technology, the advantages of the present invention are:

[0017] 1: By setting up a blanking mechanism, the air inlet ring pressed and formed in the pressing groove can be dumped out, and during the rotation of the annular frame, the unpressed welded cone cylinder in the pressing groove can be transported to the bottom of the upper mold to wait for pressing, avoiding the need for staff to take out the air inlet ring after it is pressed and formed in the existing technology before the next pressing can be carried out. This method undoubtedly increases the pressing and forming time of the air inlet ring.

[0018] 2: By setting up an air blowing mechanism, on the one hand, air can be blown to the air inlet ring to speed up its shedding, and on the other hand, the pressing groove can be cleaned to avoid the presence of debris generated after pressing and forming in the pressing groove after pressing and forming, which will affect the pressing and forming quality of the subsequent air inlet ring.

[0019] 3: By setting up a knocking mechanism, the first plate moves back and forth under the extrusion of the cam and the elastic force of multiple first springs, so that multiple knocking rods can intermittently knock on the lower mold, causing vibrations on the lower mold, which can further accelerate the press-formed air inlet ring to fall off from the pressing groove.

[0020] 4: By setting up an air intake mechanism, when high-pressure gas enters the hollow circular plate, multiple impellers are subjected to a large tangential force from the high-pressure gas. Then, multiple impellers can rotate rapidly under the impact of the high-pressure gas, thereby driving the cross bar to rotate and achieve the knocking of the lower mold without the need to set up other electrical equipment for driving. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural schematic diagram of a blower air inlet ring die pressing device proposed by the present invention;

[0022] Figure 2 for Figure 1 A vertical cross-sectional structural diagram of ;

[0023] Figure 3 for Figure 2 Schematic diagram of the structure of the middle and lower molds;

[0024] Figure 4 for Figure 2 A schematic diagram of the structure at center A;

[0025] Figure 5 for Figure 1 Schematic diagram of the transverse cross-sectional structure of the middle and lower molds;

[0026] Figure 6 for Figure 2 A magnified schematic diagram of the structure at B in the middle;

[0027] Figure 7 for Figure 1Schematic diagram of the rear view structure.

[0028] In the figure: 1. shaped plate; 2. rotating ring; 3. annular frame; 4. hollow rod; 5. lower die; 6. pressing groove; 7. arc-shaped tooth plate; 8. bevel gear; 9. cavity; 10. first blowing hole; 11. second blowing hole; 12. circular ring; 13. arc-shaped groove; 14. air inlet pipe; 15. air outlet groove; 16. hollow circular plate; 17. first tube; 18. second tube; 19. arc-shaped plate; 20. groove; 21. cross bar; 22. impeller; 23. cam; 24. first plate; 25. first spring; 26. knock rod; 27. hydraulic cylinder; 28. second plate; 29. upper die; 30. cylinder; 31. threaded sleeve; 32. one-way bearing; 33. first gear; 34. second gear; 35. second spring; 36. third plate; 37. rifle rod; 38. slide rod. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] Reference Figure 1 - Figure 7 A fan air inlet ring pressing device includes a C-shaped plate 1, which is provided with a pressing mechanism for pressing the fan air inlet ring. The pressing mechanism includes two lower molds 5, and a pressing groove 6 is opened on the upper end of the lower mold 5. Two hydraulic cylinders 27 are fixedly connected to the upper end of the C-shaped plate 1, and the lower ends of the two hydraulic cylinders 27 are fixedly connected to a second plate 28, and the lower end of the second plate 28 is fixedly connected to an upper mold 29. The welded cone is placed in the pressing groove 6. As the upper mold 29 moves downward, the flange bending and taper correction of the welded cone can be completed.

[0031] The blanking mechanism includes a rotating ring 2 rotatably connected to the upper surface of the C-shaped plate 1, a ring frame 3 is fixedly connected to the upper end of the rotating ring 2, and two opposite inner walls of the ring frame 3 are rotatably connected to two hollow rods 4 respectively. The side walls of the two hollow rods 4 are fixedly connected to the side walls of the two lower molds 5 respectively. An arc-shaped tooth plate 7 is fixedly connected to the upper surface of the C-shaped plate 1, and a helical gear 8 meshing with the arc-shaped tooth plate 7 is fixedly connected to the side wall of the hollow rod 4. The upper end of the C-shaped plate 1 away from the arc-shaped tooth plate 7 is fixedly connected to an arc plate 19 that fits with the lower ends of the two lower molds 5.

[0032] Furthermore, during the 180° rotation of the annular frame 3, the bevel gear 8 corresponding to the upper die 29 will initially engage with the arc-shaped tooth plate 7. At this time, under the meshing action of the two, when the bevel gear 8 and the arc-shaped tooth plate 7 are initially engaged and separated, the bevel gear 8 will drive the lower die 5 to rotate 360° through the hollow rod 4 and maintain a horizontal position. The pressing groove 6 will synchronously rotate downward and then upward. When the pressing groove 6 rotates downward, the air inlet ring pressed and formed in the pressing groove 6 can be dumped out, and during the rotation of the annular frame 3, the unpressed welded cone cylinder in the pressing groove 6 can be transported to the bottom of the upper die 29 to wait for pressing, avoiding the need for the staff to take out the air inlet ring after it is pressed and formed in the prior art, and then the next pressing can be carried out. This method undoubtedly increases the pressing and forming time of the air inlet ring.

[0033] The blowing mechanism includes a cavity 9 opened in the lower mold 5, a plurality of first blowing holes 10 connected to the bottom of the pressing groove 6 are opened on the top of the cavity 9, and a plurality of second blowing holes 11 connected to the inner wall of the pressing groove 6 are opened on the top of the cavity 9. The second blowing holes 11 are arranged upward and away from the inner wall of the cavity 9. On the one hand, air can be blown to the air inlet ring to accelerate its falling off. On the other hand, the pressing groove 6 can be cleaned to avoid the presence of debris generated after pressing in the pressing groove 6 after pressing, which will affect the pressing quality of the subsequent air inlet ring.

[0034] The blowing mechanism also includes a circular ring 12 fixedly connected to the inner wall of the annular frame 3 through a bracket, and the inner wall of the circular ring 12 is sealed and rotatably connected to an air inlet pipe 14. The inner wall of the circular ring 12 is provided with two arc grooves 13 corresponding to the two hollow rods 4. The end of the hollow rod 4 away from the lower mold 5 passes through the side wall of the circular ring 12 and extends into the arc groove 13. The side wall of the hollow rod 4 is sealed and rotatably connected to the side wall of the circular ring 12. The inner wall of the air inlet pipe 14 is provided with an air outlet groove 15 that cooperates with the arc groove 13. The side wall of the air inlet pipe 14 is fixedly connected to the side wall of the shaped plate 1, and the hollow rod 4 is connected to the inner wall of the cavity 9 through the air inlet mechanism.

[0035] Further, such as Figure 1 、 Figure 2 and Figure 4 As shown, when the annular frame 3 drives the circular ring 12 to rotate, the air inlet pipe 14 does not rotate at this time, and high-pressure gas is transported in the air inlet pipe 14. It is a prior art. When the arc groove 13 corresponding to the bevel gear 8 engaged with the arc-shaped tooth plate 7 rotates to cooperate with the air outlet groove 15, the high-pressure gas in the air inlet pipe 14 will enter the hollow rod 4 through the air outlet groove 15 and the arc groove 13, thereby realizing the blowing operation in the pressure groove 6. In this way, the pressure groove 6 of the press-formed air inlet ring can be automatically blown during the rotation of the annular frame 3.

[0036] The knocking mechanism includes two grooves 20 respectively opened on the side walls of the lower mold 5 on both sides. The inner wall of the groove 20 is slidably connected to the first plate 24. The inner wall of the groove 20 is elastically connected to the side wall of the first plate 24 through a first spring 25. The side wall of the first plate 24 close to the first spring 25 is fixedly connected to a plurality of knocking rods 26. The inner wall of the groove 20 is rotatably connected to the cross bar 21. The side wall of the cross bar 21 is fixedly connected to a plurality of cams 23. The angle between two adjacent cams 23 is 90°.

[0037] Furthermore, multiple cams 23 can intermittently squeeze the first plate 24, so that the first plate 24 moves back and forth under the squeezing of the cams 23 and the elastic force of multiple first springs 25, so that multiple knocking rods 26 can intermittently knock on the lower mold 5, causing vibrations on the lower mold 5, which can further accelerate the fall of the pressed air inlet ring from the pressing groove 6, and the angle between the two cams 23 is 90°, which can shorten the squeezing interval time of the cam 23 on the first plate 24, thereby increasing the sense of vibration on the lower mold 5.

[0038] The air intake mechanism includes two hollow circular plates 16 fixedly connected to the side wall of the lower mold 5, and the two hollow circular plates 16 correspond one to one to the two grooves 20. One end of the cross bar 21 passes through the side wall of the hollow circular plate 16 and extends into the interior thereof. The side wall of the cross bar 21 is sealed and rotatably connected to the side wall of the hollow circular plate 16. The side wall of the cross bar 21 located inside the hollow circular plate 16 is fixedly connected with multiple impellers 22. The side wall of the hollow rod 4 is connected to the upper inner wall of the hollow circular plate 16 through the first tube 17, and the nozzle of the first tube 17 located inside the hollow circular plate 16 is inclined toward the impeller 22. The bottom of the hollow circular plate 16 is connected to the inner wall of the cavity 9 through the second tube 18.

[0039] Further, such as Figure 3 and Figure 5 As shown, the mouth of the first tube 17 located in the hollow circular plate 16 is tilted toward the impeller 22, so that when the high-pressure gas enters the hollow circular plate 16, the multiple impellers 22 are subjected to a large tangential force of the high-pressure gas. Then, the multiple impellers 22 can rotate rapidly under the impact of the high-pressure gas, thereby driving the cross bar 21 to rotate, thereby achieving the knocking of the lower mold 5, without the need to set up other electrical equipment for driving.

[0040] A rotating mechanism for driving the annular frame 3 to rotate is provided on the C-shaped plate 1. The rotating mechanism includes a one-way bearing 32. The upper end of the annular frame 3 is fixedly connected to a cylinder 30. The side wall of the cylinder 30 is rotatably connected to the side wall of the C-shaped plate 1. The upper end of the C-shaped plate 1 is rotatably connected to a threaded sleeve 31. The side wall of the threaded sleeve 31 is fixedly connected to the inner ring of the one-way bearing 32. The outer ring of the one-way bearing 32 is fixedly connected to a first gear 33. The side wall of the cylinder 30 is fixedly connected to a second gear 34 that meshes with the first gear 33. The lower surface of the C-shaped plate 1 is elastically connected to a third plate 36 through a plurality of second springs 35. The upper end of the third plate 36 is fixedly connected to a rifle rod 37. The inner wall of the threaded sleeve 31 is threadedly connected to the inner wall of the rifle rod 37. The lower end of the third plate 36 is fixedly connected to a plurality of sliding rods 38. The side wall of the second plate 28 is slidably connected to the side walls of the plurality of sliding rods 38.

[0041] Further, such as Figure 2 and Figure 6 As shown, when the rifle rod 37 moves upward, it will drive the threaded sleeve 31 to rotate clockwise, and then the inner ring of the one-way bearing 32 will drive its outer ring to rotate, and then the first gear 33 will drive the cylinder 30 to rotate counterclockwise through the second gear 34, and when it moves to the top, that is, the initial position, on the second plate 28, the annular frame 3 can rotate 180°. When the rifle rod 37 moves downward, it will drive the threaded sleeve 31 to rotate counterclockwise, and then the inner ring of the one-way bearing 32 will not drive its outer ring to rotate.

[0042] Furthermore, the upper surface of the second plate 28 and the lower surface of the third plate 36 are fitted together. When the second plate 28 moves down to the bottom so that the upper mold 29 completes the pressing of the air inlet ring, the third plate 36 and the second plate 28 are in a separated state. Only after the second plate 28 moves up a certain distance and then fits with the third plate 36, the upper mold 29 is completely separated from the pressing groove 6 and will not hinder the rotation of the lower mold 5.

[0043] When pressing the fan inlet ring, first place the welded cone in the two pressing grooves 6, then adjust the extension of the two hydraulic cylinders 27 so that the upper die 29 moves down into the pressing groove 6 to complete the pressing of the air inlet ring;

[0044] Then, the two hydraulic cylinders 27 are adjusted to contract, thereby driving the second plate 28 to move upward. When the second plate 28 moves upward and fits the third plate 36, the upper die 29 is completely separated from the pressing groove 6. As the second plate 28 continues to move upward, the third plate 36 drives the rifle rod 37 to move upward, driving the threaded sleeve 31 to rotate clockwise, and then the inner ring of the one-way bearing 32 drives its outer ring to rotate, so that the first gear 33 drives the cylinder 30 to rotate counterclockwise through the second gear 34, driving the annular frame 3 to rotate counterclockwise. Then, when the second plate 28 moves to the top, that is, the initial position, the annular frame 3 is rotated 180°.

[0045] During the 180° rotation of the annular frame 3, the bevel gear 8 corresponding to the upper die 29 will initially mesh with the arc-shaped tooth plate 7. Subsequently, under the meshing action of the two, when the bevel gear 8 and the arc-shaped tooth plate 7 are initially meshed and separated, the bevel gear 8 will drive the lower die 5 to rotate 360° through the hollow rod 4 and then maintain a horizontal position. The pressing groove 6 will synchronously rotate downward and then upward. When the pressing groove 6 rotates downward, the air inlet ring pressed and formed in the pressing groove 6 can be dumped out. In addition, during the rotation of the annular frame 3, the unpressed welded cone cylinder in the pressing groove 6 can be transported to the bottom of the upper die 29 to wait for pressing.

[0046] And during the rotation of the annular frame 3, when the arc groove 13 corresponding to the bevel gear 8 meshing with the arc-shaped toothed plate 7 rotates to match the air outlet groove 15, the high-pressure gas in the air inlet pipe 14 will enter the hollow rod 4 through the air outlet groove 15 and the arc groove 13, and then the high-pressure gas will enter the hollow circular plate 16 at a high speed through the first tube 17. At this time, the multiple impellers 22 are subjected to a large tangential force of the high-pressure gas, causing the multiple impellers 22 to rotate rapidly under the impact of the high-pressure gas, thereby driving the cross bar 21 to rotate, and then the multiple cams 23 can intermittently squeeze the first plate 24. Subsequently, the first plate 24 moves back and forth under the squeezing of the cam 23 and the elastic force of the multiple first springs 25, driving the multiple knocking rods 26 to intermittently knock on the lower die 5, causing vibrations on the lower die 5, which can further accelerate the pressed air inlet ring to fall off from the pressing groove 6;

[0047] Then the high-pressure gas will enter the cavity 9 through the second tube 18, and the high-pressure gas will be blown out through the multiple first blowing holes 10 and the multiple second blowing holes 11. On the one hand, it can blow air to the air inlet ring to speed up its shedding. On the other hand, it can clean the pressing groove 6 to avoid the presence of debris generated after pressing and forming in the pressing groove 6 after pressing and forming, which will affect the pressing and forming quality of the subsequent air inlet ring.

[0048] The above are only preferred specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A blower air inlet ring die pressing device, characterized in that: Comprising: A U-shaped plate (1), on which a pressing mechanism for pressing the air inlet ring of the fan is provided. The pressing mechanism includes two lower dies (5), and a pressing groove (6) is opened at the upper end of the lower die (5); A blanking mechanism, which includes a rotating ring (2) rotatably connected to the upper surface of the U-shaped plate (1). An annular frame (3) is fixedly connected to the upper end of the rotating ring (2). Two hollow rods (4) are respectively rotatably connected to the opposite inner walls of the annular frame (3). The side walls of the two hollow rods (4) are fixedly connected to the side walls of the two lower dies (5). An arc-shaped tooth plate (7) is fixedly connected to the upper surface of the U-shaped plate (1). A helical gear (8) meshing with the arc-shaped tooth plate (7) is fixedly connected to the side wall of the hollow rod (4). An arc-shaped plate (19) fitting with the lower ends of the two lower dies (5) is fixedly connected to the upper end of the U-shaped plate (1) away from the arc-shaped tooth plate (7); A blowing mechanism for blowing air into the pressing groove (6).

2. A blower air inlet ring die pressing device according to claim 1, characterized in that: The blowing mechanism includes a cavity (9) opened in the lower die (5). A plurality of first air blowing holes (10) communicating with the bottom of the pressing groove (6) are opened at the top of the cavity (9). A plurality of second air blowing holes (11) communicating with the inner wall of the pressing groove (6) are opened at the top of the cavity (9). The inner wall of the second air blowing hole (11) away from the cavity (9) is inclined upward. A circular ring (12) is fixedly connected to the inner wall of the annular frame (3) through a bracket. An air inlet pipe (14) is hermetically rotatably connected to the inner wall of the circular ring (12). Two arc-shaped grooves (13) corresponding to the two hollow rods (4) are opened on the inner wall of the circular ring (12). One end of the hollow rod (4) away from the lower die (5) penetrates through the side wall of the circular ring (12) and extends into the arc-shaped groove (13). The side wall of the hollow rod (4) is hermetically rotatably connected to the side wall of the circular ring (12). An air outlet groove (15) matching with the arc-shaped groove (13) is opened on the inner wall of the air inlet pipe (14). The side wall of the air inlet pipe (14) is fixedly connected to the side wall of the U-shaped plate (1). The hollow rod (4) is communicated with the inner wall of the cavity (9) through an air inlet mechanism.

3. A blower air inlet ring die pressing device according to claim 2, characterized in that: It further includes a knocking mechanism, which includes two grooves (20) respectively opened on the opposite side walls of the lower die (5). A first plate (24) is slidably connected to the inner wall of the groove (20). The inner wall of the groove (20) is elastically connected to the side wall of the first plate (24) through a first spring (25). A plurality of knocking rods (26) are fixedly connected to the side wall of the first plate (24) close to the first spring (25). A cross bar (21) is rotatably connected to the inner wall of the groove (20). A plurality of cams (23) are fixedly connected to the side wall of the cross bar (21).

4. A blower air inlet ring die pressing device according to claim 3, characterized in that: The air intake mechanism includes two hollow circular plates (16) fixedly connected to the side wall of the lower mold (5), the two hollow circular plates (16) correspond to the two grooves (20) one by one, one end of the cross bar (21) passes through the side wall of the hollow circular plate (16) and extends into the interior thereof, the side wall of the cross bar (21) is sealed and rotatably connected to the side wall of the hollow circular plate (16), the side wall of the cross bar (21) located inside the hollow circular plate (16) is fixedly connected with a plurality of impellers (22), the side wall of the hollow rod (4) is connected to the upper inner wall of the hollow circular plate (16) through a first tube (17), and the nozzle of the first tube (17) located inside the hollow circular plate (16) is inclined toward the impeller (22), and the bottom of the hollow circular plate (16) is connected to the inner wall of the cavity (9) through a second tube (18).

5. A blower air inlet ring die pressing device according to claim 3, characterized in that: The included angle between two adjacent cams (23) is 90°.

6. A blower air inlet ring die pressing device according to claim 1, characterized in that: The pressing mechanism further comprises two hydraulic cylinders (27) fixedly connected to the upper end of the U-shaped plate (1), the lower ends of the two hydraulic cylinders (27) are fixedly connected to a second plate (28), and the lower end of the second plate (28) is fixedly connected to an upper die (29).

7. A blower air inlet ring die pressing device according to claim 6, characterized in that: The shaped plate (1) is provided with a rotating mechanism for driving the annular frame (3) to rotate, the rotating mechanism comprising a one-way bearing (32), the upper end of the annular frame (3) is fixedly connected with a cylinder (30), the side wall of the cylinder (30) is rotatably connected to the side wall of the shaped plate (1), the upper end of the shaped plate (1) is rotatably connected with a threaded sleeve (31), the side wall of the threaded sleeve (31) is fixedly connected to the inner ring of the one-way bearing (32), the outer ring of the one-way bearing (32) is fixedly connected with a first gear (33), the cylinder The side wall (30) is fixedly connected to a second gear (34) meshing with the first gear (33); the lower surface of the shaped plate (1) is elastically connected to a third plate (36) via a plurality of second springs (35); the upper end of the third plate (36) is fixedly connected to a rifle rod (37); the inner wall of the threaded sleeve (31) is threadedly connected to the inner wall of the rifle rod (37); the lower end of the third plate (36) is fixedly connected to a plurality of slide rods (38); the side wall of the second plate (28) is slidably connected to the side walls of the plurality of slide rods (38).

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