A self-demolding wind turbine blade mold and demoulding method thereof

Abstract

The present invention discloses a self-demolding wind turbine blade mold and a demoulding method thereof, which relates to the field of blade molds, and comprises a support leg and a workbench fixedly installed at the upper end of the support leg, wherein a lower mold is fixedly installed on the upper end surface of the workbench, and an upper mold is rotatably installed on the outer side of the lower mold, and a lifting groove is provided inside the lower mold, and a lifting plate is nested and installed inside the lifting groove, and the lifting plate is in a concave arc shape. The self-demolding wind turbine blade mold and a demoulding method thereof can automatically eject the blade inside the lower mold by moving the lifting plate upward, and at the same time, the connecting rod will support the top sealing plate to ensure the stability of the lifting plate supporting the blade, and the lifting plate moving upward will cause the support rod to move inside the fixed cylinder, thereby ensuring the stability of the lifting plate moving up and down, and the lifting plate moving upward will cause the blade to be automatically demoulded from the mold, thereby improving the convenience of demoulding the mold.

Description

Technical Field

[0001] The invention relates to the technical field of blade moulds, in particular to a self-demolding wind turbine blade mould and a demoulding method thereof. Background Art

[0002] In the process of producing wind turbine blades, the production of blades is completed by bonding two sets of blades, and the inside of the blades is hollow, so as to reduce the overall mass of the blades, and the accuracy of the blade docking is ensured by the mold closing during the docking process of the two sets of blades;

[0003] However, the existing wind turbine blade molds still have certain use defects during use. Demolding generally uses a lifting device to forcibly remove the blade from the mold. At the moment of demolding, the impact force is very large and the stability is poor, which can easily cause damage and deformation of the lifting device.

[0004] Patent application publication number CN116834339B discloses a wind turbine blade mold that can be evenly cooled. By setting a water cooling mechanism, when the user starts the water cooling motor, the water cooling motor drives the rotating disk to rotate, and the rotation of the rotating disk drives the extrusion wheel to rotate. The rotation of the extrusion wheel will intermittently squeeze the U-shaped hose. Due to the restrictions of the water suction check valve and the water outlet check valve, the ice water in the water tank is sucked into the U-shaped hose, and then injected into the water outlet pipe, and then injected into the cooling pipe through the water outlet pipe. The cooling pipe covers most of the area of ​​the second template in a winding manner. After heat exchange with the second template, the water in the cooling pipe flows back to the water tank to cool down, and then the above steps are repeated continuously. During the whole process, the flow speed of the water flow is uniform and moderate, and there is sufficient time for heat exchange, which can cool the second template, accelerate the cooling of the blade, and facilitate the demolding of the user;

[0005] For another example, the patent application publication number CN118205237A discloses a wind turbine blade mold with a demoulding component and a demoulding method, which is provided with a connecting frame, an adjusting wheel, a connecting wheel and a slide, the connecting frame is meshed and connected with the adjusting wheel and the connecting wheel, the adjusting wheel and the connecting wheel rotate to drive the connecting frame to rise and fall, the connecting frame drives the supporting plate to rise and fall, the slide slides under the supporting plate, it is convenient to adjust the position of the base, and it can be accurately positioned, and a material barrel, a heating pipe, a heat conducting pipe and a temperature controller are provided, the outer side of the material barrel is wrapped with a heating pipe, the outer side of the heating pipe is provided with a protective sleeve, the inner side of the rock wool insulation layer is installed with a heat conducting pipe, the outer side of the heat conducting pipe is tightly fitted with a rock wool insulation layer, the temperature of the resin can be effectively controlled to prevent the resin from hardening prematurely during storage and molding, an air bag, an air pump and a demoulding plate are provided, the demoulding plate and the rock wool insulation layer are tightly fitted, the resin is poured between the dynamic mold and the demoulding plate, the air pump drives the air bag to expand, the air bag pushes the demoulding plate to lift, and the demoulding plate pushes the blade body to lift, which is convenient for rapid demoulding after molding and improves the work efficiency of blade molding;

[0006] In the above-mentioned public patent, the mold in the patent solves the above-mentioned problems, but the mold in the patent still has the following problems during use. During the demolding process of the above-mentioned mold, the demolding plate and the fixed mold (the first mold and the second mold) need to be separated by a driving structure. After the demolding plate is separated from the fixed mold, the wind turbine blade needs to be removed from the inside of the fixed mold by other devices, so that the lower end of the wind turbine blade is still located inside the mold at the lower end of the fixed mold, and the demolding is not completely completed. The wind turbine blade still needs to be removed with the help of an external device, which affects the convenience of mold demolding.

[0007] In view of the above problems, it is urgent to carry out innovative design based on the original mold structure. Summary of the invention

[0008] The purpose of the present invention is to provide a self-demolding wind turbine blade mold and a demolding method thereof, so as to solve the problem raised in the above-mentioned background technology that after the demolding plate is separated from the fixed mold, the wind turbine blade needs to be removed from the inside of the fixed mold by other devices, so that the lower end of the wind turbine blade is still located inside the mold at the lower end of the fixed mold, and the demolding is not completely completed. The wind turbine blade still needs to be removed with the help of an external device, which affects the convenience of mold demolding.

[0009] To achieve the above object, the present invention provides the following technical solutions: a self-demolding wind turbine blade mold and a demoulding method thereof, comprising a support leg and a workbench fixedly mounted on the upper end of the support leg;

[0010] A lower mold is fixedly installed on the upper end surface of the workbench, and an upper mold is rotatably installed on the outer side of the lower mold, and the upper mold is located at the upper end of the workbench, and mold cavities are opened inside the lower mold and the upper mold, and a driving mechanism is fixedly installed on the upper end surface of the workbench;

[0011] A lifting groove is opened inside the lower mold, and the lifting groove is located inside the mold cavity, and four groups of lifting grooves are evenly arranged inside the mold cavity. A lifting plate is nested and installed inside the lifting groove, and the lifting plate has an inward concave arc shape, and the upper end surface of the lifting plate is flush with the inner surface of the mold cavity.

[0012] Preferably, a lifting cylinder is fixedly installed at the lower end of the jacking plate, and the lifting cylinder is located directly below the jacking plate, and a connecting rod is fixedly installed between the lifting cylinder and the jacking plate, and the connecting rod is located at the left and right sides of the lifting cylinder.

[0013] Preferably, a support rod is fixedly installed at the lower end of the connecting rod, a fixed cylinder is fixedly installed inside the lower mold, and the fixed cylinder is located on the outside of the support rod, and the fixed cylinder is slidably connected to the support rod, and at the same time, two groups of fixed cylinders and support rods are symmetrically arranged about the vertical center axis of the lifting cylinder.

[0014] Preferably, a threaded rod is rotatably mounted inside the workbench and the lower mold, and the upper end of the threaded rod is located inside the lifting cylinder, and the lifting cylinder is threadedly connected to the threaded rod.

[0015] Preferably, a bevel gear 1 is fixedly installed on the lower end of the threaded rod, a drive motor is fixedly installed on the lower end of the workbench, and an output shaft is fixedly installed on the output end of the drive motor, and the output shaft is rotatably connected to the lower end of the workbench, and a bevel gear 2 is fixedly installed on the outer side of the output shaft, and the bevel gear 2 is meshingly connected to the bevel gear 1.

[0016] Preferably, a docking groove is provided on the upper end surface of the lower mold, and a limit block is fixedly installed on the upper end surface of the upper mold, and the limit block can enter the interior of the docking groove.

[0017] Preferably, a fixing rod is fixedly installed inside the docking groove, and a reset spring is sleeved on the outer side of the fixing rod, and a lifting plate is slidably installed on the outer side of the fixing rod, and the lifting plate is located at the upper end of the reset spring, a limiting rod is fixedly installed inside the lifting plate, and an adjusting rod is fixedly installed at the lower end of the lifting plate, and a clamping block is slidably installed inside the lifting plate, and the clamping block is slidably connected to the limiting rod and the adjusting rod respectively.

[0018] Preferably, a rotating gear cylinder is rotatably installed on the upper end of the lifting plate, a fixed rack is fixedly installed inside the docking groove, a moving rack is fixedly installed on the outer side of the clamping block, and both the moving rack and the fixed rack are meshed and connected with the rotating gear cylinder, and the moving rack is vertically arranged to the fixed rack.

[0019] Preferably, an exhaust pipe is fixedly installed inside the lower mold, and an exhaust hole is opened inside the lower end of the exhaust pipe, and an extrusion rod is slidably installed inside the exhaust pipe, a contact plate is fixedly installed on the upper end of the extrusion rod, and a support spring is sleeved on the outer side of the extrusion rod and the exhaust pipe, and the upper and lower ends of the support spring are in close contact with the contact plate and the lower mold respectively.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The blade inside the lower mold can be automatically ejected by moving the jacking plate upward. At the same time, the connecting rod will support the top sealing plate to ensure the stability of the jacking plate supporting the blade. The upward movement of the jacking plate will make the support rod move inside the fixed cylinder, thereby ensuring the stability of the up and down movement of the jacking plate. The upward movement of the jacking plate will automatically demould the blade from the mold, improving the convenience of demoulding the mold.

[0022] 2. The lifting plate can be moved downward by squeezing the lifting plate with the limit block, and the downward movement of the lifting plate will make the two sets of clamping blocks approach each other and clamp the limit blocks, thereby completing the unknown limit of the limit blocks, ensuring the accuracy of the docking between the lower mold and the upper mold, thereby improving the accuracy of the docking between the two sets of blades;

[0023] 3. Furthermore, by moving the lifting plate downward, the rotating gear cylinder can be rotated and drive the moving rack to move, and the moving rack will push the clamping block to move and clamp the limit block. The limit block is clamped by the force of the limit block moving downward, which can improve the convenience of the limit block;

[0024] 4. Furthermore, multiple sets of lifting plates are arranged inside the lower mold to improve the stability of the blade ejection and avoid damage due to the blade being too large;

[0025] 5. Furthermore, by squeezing the contact plate through the upper mold, the extrusion rod can move downward inside the exhaust pipe, so that the gas in the exhaust pipe is discharged through the exhaust hole, reducing the noise generated by the mold closing between the upper mold and the lower mold, and improving the working comfort of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0027] Figure 2 It is a bottom-up three-dimensional structural schematic diagram of the present invention;

[0028] Figure 3 It is a schematic diagram of the three-dimensional structure of the cross section of the lower mold of the present invention;

[0029] Figure 4 This is a schematic diagram of the three-dimensional structure of the lower mold of the present invention when viewed from above;

[0030] Figure 5 It is a schematic diagram of the three-dimensional structure of the jacking plate of the present invention;

[0031] Figure 6 This is a schematic diagram of the three-dimensional structure of the lifting plate of the present invention;

[0032] Figure 7 It is a schematic diagram of the three-dimensional structure of the clamping block of the present invention;

[0033] Figure 8 It is a schematic diagram of the three-dimensional structure of the adjustment rod of the present invention;

[0034] Fig. 9 It is a schematic diagram of the three-dimensional structure of the exhaust pipe of the present invention.

[0035] In the figure: 1. supporting leg; 2. working table; 3. lower mold; 4. upper mold; 5. driving mechanism; 6. mold cavity; 7. limiting block; 8. lifting groove; 9. lifting plate; 10. lifting cylinder; 11. connecting rod; 12. supporting rod; 13. fixing cylinder; 14. threaded rod; 15. bevel gear one; 16. driving motor; 17. output shaft; 18. bevel gear two; 19. docking groove; 20. fixing rod; 21. reset spring; 22. lifting plate; 23. limiting rod; 24. clamping block; 25. moving rack; 26. rotating gear cylinder; 27. fixing rack; 28. adjusting rod; 29. ​​exhaust cylinder; 30. exhaust hole; 31. extrusion rod; 32. contact plate; 33. supporting spring. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the 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 creative work are within the scope of protection of the present invention.

[0037] Embodiment 1: This embodiment Figure 1-Figure 5 As shown, in order to solve the problem that it is inconvenient to take out large blades during the demoulding process of the existing mold, the process of automatically ejecting the blades by demoulding the mold is disclosed, and the effect of facilitating the removal of the blades during the demoulding process of the mold is achieved. The specific contents are as follows:

[0038] A support leg 1 and a workbench 2 fixedly mounted on the upper end of the support leg 1;

[0039] A lower mold 3 is fixedly mounted on the upper end surface of the workbench 2, and an upper mold 4 is rotatably mounted on the outer side of the lower mold 3, and the upper mold 4 is located at the upper end of the workbench 2. At the same time, a mold cavity 6 is opened inside the lower mold 3 and the upper mold 4, and a driving mechanism 5 is fixedly mounted on the upper end surface of the workbench 2;

[0040] A lifting groove 8 is provided inside the lower mold 3, and the lifting groove 8 is located inside the mold cavity 6, and four groups of the lifting grooves 8 are equidistantly arranged inside the mold cavity 6, and a lifting plate 9 is nested and installed inside the lifting groove 8, and the lifting plate 9 is in a concave arc shape, and the upper end surface of the lifting plate 9 is flush with the inner surface of the mold cavity 6;

[0041] A lifting cylinder 10 is fixedly installed at the lower end of the lifting plate 9, and the lifting cylinder 10 is located directly below the lifting plate 9, and a connecting rod 11 is fixedly installed between the lifting cylinder 10 and the lifting plate 9, and the connecting rod 11 is located on the left and right sides of the lifting cylinder 10;

[0042] A support rod 12 is fixedly installed at the lower end of the connecting rod 11, and a fixed cylinder 13 is fixedly installed inside the lower mold 3, and the fixed cylinder 13 is located outside the support rod 12, and the fixed cylinder 13 is slidably connected to the support rod 12, and at the same time, the fixed cylinder 13 and the support rod 12 are symmetrically arranged in two groups about the vertical center axis of the lifting cylinder 10;

[0043] A threaded rod 14 is rotatably mounted inside the workbench 2 and the lower mold 3, and the upper end of the threaded rod 14 is located inside the lifting cylinder 10, and the lifting cylinder 10 is threadedly connected to the threaded rod 14;

[0044] A bevel gear 15 is fixedly installed on the lower end of the threaded rod 14, a drive motor 16 is fixedly installed on the lower end of the workbench 2, and an output shaft 17 is fixedly installed on the output end of the drive motor 16, and the output shaft 17 is rotatably connected to the lower end of the workbench 2, a bevel gear 2 18 is fixedly installed on the outer side of the output shaft 17, and the bevel gear 2 18 is meshingly connected to the bevel gear 15.

[0045] When using the self-demolding wind turbine blade mold, the mold is first placed at the position where the work needs to be done. After the mold is placed, the wind turbine blade can be produced. The wind turbine blades are generally large in size. During the production process, two sets of blades are bonded together to complete the production of the entire blade.

[0046] After the blades are generally placed inside the mold cavities 6 of the lower mold 3 and the upper mold 4, the fixed blades can be docked. During this process, the driving mechanism 5 will work and push the upper mold 4 to rotate on the outside of the lower mold 3, and the rotation of the upper mold 4 will make the upper mold 4 fit with the lower mold 3, so that the two groups of half blades are spliced ​​together. After the two groups of blades are spliced, the glue applied on the outside will be adhered and solidified to ensure the firmness of the blade production;

[0047] After the lower mold 3 and the upper mold 4 are molded together for a certain period of time, the glue sticking to the surface of the blades will solidify and complete the splicing process of the two sets of blades. At this time, the lower mold 3 and the upper mold 4 can be separated and the finished blades can be taken out;

[0048] After the lower mold 3 is separated from the upper mold 4, the driving motor 16 can drive the output shaft 17 to rotate, and the rotation of the output shaft 17 will drive the bevel gear 2 18 to rotate, and the rotation of the bevel gear 2 18 will drive the bevel gear 1 15 meshing with it to rotate. At this time, the bevel gear 15 will drive the threaded rod 14 to slide inside the fixed cylinder 13, and the rotation of the threaded rod 14 will cause the fixed cylinder 13 to move upward. During the upward movement of the fixed cylinder 13, the lifting plate 9 will be driven upward synchronously, and the upward movement of the lifting plate 9 will cause the blades inside the lower mold 3 to be lifted upward, and during the upward movement of the lifting plate 9, the support rod 12 will move upward inside the fixed cylinder 13, thereby ensuring the stability of the lifting plate 9 and avoiding the tilting of the lifting plate 9 due to uneven distribution of blade gravity. At the same time, the connecting rod 11 at the lower end of the lifting plate 9 will improve the support stability of the lifting plate 9 and expand the support range of the lifting cylinder 10 for the lifting plate 9.

[0049] Embodiment 2: This embodiment is as follows Figure 1-Figure 2 and Figure 6-Figure 8 As shown, in order to solve the problem of mold clamping deviation during long-term use of the mold, the process of clamping the lower mold 3 and the upper mold 4 is disclosed, so that the mold can be accurately docked, and the specific contents are as follows:

[0050] The upper end surface of the lower mold 3 is provided with a docking groove 19, and the upper end surface of the upper mold 4 is fixedly installed with a limit block 7, and the limit block 7 can enter the interior of the docking groove 19;

[0051] A fixing rod 20 is fixedly installed inside the docking groove 19, and a reset spring 21 is sleeved on the outer side of the fixing rod 20, and a lifting plate 22 is slidably installed on the outer side of the fixing rod 20, and the lifting plate 22 is located at the upper end of the reset spring 21, and a limit rod 23 is fixedly installed inside the lifting plate 22, and an adjustment rod 28 is fixedly installed at the lower end of the lifting plate 22, and a clamping block 24 is slidably installed inside the lifting plate 22, and the clamping block 24 is slidably connected with the limit rod 23 and the adjustment rod 28 respectively;

[0052] A rotating gear cylinder 26 is rotatably installed on the upper end of the lifting plate 22, a fixed rack 27 is fixedly installed inside the docking groove 19, a moving rack 25 is fixedly installed on the outer side of the clamping block 24, and the moving rack 25 and the fixed rack 27 are meshed and connected with the rotating gear cylinder 26, and the moving rack 25 is vertically arranged with the fixed rack 27.

[0053] When the self-demolding wind turbine blade mold is used, during the docking process between the lower mold 3 and the upper mold 4, the limit block 7 will enter the inside of the docking groove 19, and the limit block 7 will contact the lifting plate 22 inside the docking groove 19 to push the lifting plate 22 to move downward. During the downward movement of the lifting plate 22, it will slide on the outside of the fixed rod 20, and the return spring 21 will be squeezed by the lifting plate 22 to shrink. At the same time, the lifting plate 22 will drive the rotating gear cylinder 26 to move downward, and during the movement of the rotating gear cylinder 26, it will move downward and rotate on the outside of the fixed rack 27, and the rotating gear cylinder 26 rotates. During the process, the moving rack 25 will be driven to move the rod, and the moving rack 25 will move away from the fixed rack 27, and the moving rack 25 will push the clamping block 24 to move during the movement, and the clamping block 24 will slide on the outside of the limit rod 23 and the adjustment rod 28 during the movement, and the two groups of clamping blocks 24 will approach each other and clamp the limit block 7, so that the limit block 7 is located at the upper end of the lifting plate 22, and the lifting plate 22 is squeezed by the limit block 7 to complete the limiting of the limit block 7 by the clamping block 24, which can ensure the accuracy of the mold closing between the lower mold 3 and the upper mold 4 and improve the safety of the use of the mold.

[0054] Embodiment 3: This embodiment is as follows Figure 1 and Fig. 9 As shown, in order to solve the problem of excessive noise during mold closing, the process of deceleration during mold closing is disclosed, which achieves the effect of reducing the noise of mold closing. The specific contents are as follows:

[0055] An exhaust cylinder 29 is fixedly installed inside the lower mold 3, and an exhaust hole 30 is opened inside the lower end of the exhaust cylinder 29, and an extrusion rod 31 is slidably installed inside the exhaust cylinder 29, and a contact plate 32 is fixedly installed on the upper end of the extrusion rod 31, and a support spring 33 is sleeved on the outer side of the extrusion rod 31 and the exhaust cylinder 29, and the upper and lower ends of the support spring 33 are in close contact with the contact plate 32 and the lower mold 3 respectively.

[0056] During the process of closing the lower mold 3 and the upper mold 4, the upper mold 4 will first contact the contact plate 32 and squeeze the contact plate 32, and the contact plate 32 will move toward the inside of the lower mold 3 after being squeezed, and the support spring 33 will be squeezed by the contact plate 32 and the lower mold 3 to be deformed. At this time, the contact plate 32 will drive the extrusion rod 31 to move downward inside the exhaust pipe 29, and the gas in the temple of the exhaust pipe 29 will be discharged through the exhaust hole 30 after being squeezed. At this time, the speed of the extrusion rod 31 and the contact plate 32 moving toward the inside of the lower mold 3 will be slowed down, and the speed before the upper mold 4 contacts the lower mold 3 will be slowed down, thereby reducing the noise generated by the closing of the lower mold 3 and the upper mold 4, improving the comfort of the staff in using the mold, and increasing the overall practicality.

[0057] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0058] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A self-demolding wind turbine blade mould, comprising a support leg (1) and a workbench (2) fixedly mounted on the upper end of the support leg (1); A lower mold (3) is fixedly mounted on the upper end surface of the workbench (2), and an upper mold (4) is rotatably mounted on the outer side of the lower mold (3), and the upper mold (4) is located at the upper end of the workbench (2). A mold cavity (6) is provided inside the lower mold (3) and the upper mold (4), and a driving mechanism (5) is fixedly mounted on the upper end surface of the workbench (2); Features: The lower mold (3) is provided with a lifting groove (8) inside, and the lifting groove (8) is located inside the mold cavity (6), and four groups of the lifting grooves (8) are arranged at equal intervals inside the mold cavity (6), and a lifting plate (9) is nested and installed inside the lifting groove (8), and the lifting plate (9) has an inner concave arc shape, and the upper end surface of the lifting plate (9) is flush with the inner surface of the mold cavity (6); A lifting cylinder (10) is fixedly mounted at the lower end of the lifting plate (9), and the lifting cylinder (10) is located directly below the lifting plate (9), and a connecting rod (11) is fixedly mounted between the lifting cylinder (10) and the lifting plate (9), and the connecting rod (11) is located on the left and right sides of the lifting cylinder (10); A support rod (12) is fixedly mounted on the lower end of the connecting rod (11), a fixed cylinder (13) is fixedly mounted inside the lower mold (3), and the fixed cylinder (13) is located outside the support rod (12), and the fixed cylinder (13) is slidably connected to the support rod (12), and two groups of the fixed cylinder (13) and the support rod (12) are symmetrically arranged about the vertical center axis of the lifting cylinder (10); An exhaust cylinder (29) is fixedly mounted inside the lower mold (3), and an exhaust hole (30) is opened inside the lower end of the exhaust cylinder (29), and an extrusion rod (31) is slidably mounted inside the exhaust cylinder (29), a contact plate (32) is fixedly mounted on the upper end of the extrusion rod (31), and a support spring (33) is sleeved on the outer sides of the extrusion rod (31) and the exhaust cylinder (29), and the upper and lower ends of the support spring (33) are in close contact with the contact plate (32) and the lower mold (3), respectively.

2. A self-demolding wind turbine blade mold according to claim 1, characterized in that: A threaded rod (14) is rotatably mounted inside the workbench (2) and the lower mold (3), and the upper end of the threaded rod (14) is located inside the lifting cylinder (10), and the lifting cylinder (10) is threadedly connected to the threaded rod (14).

3. A self-demolding wind turbine blade mold according to claim 2, characterized in that: A bevel gear 1 (15) is fixedly mounted on the lower end of the threaded rod (14), a drive motor (16) is fixedly mounted on the lower end of the workbench (2), an output shaft (17) is fixedly mounted on the output end of the drive motor (16), and the output shaft (17) is rotatably connected to the lower end of the workbench (2), a bevel gear 2 (18) is fixedly mounted on the outer side of the output shaft (17), and the bevel gear 2 (18) is meshingly connected to the bevel gear 1 (15).

4. The self-demolding wind turbine blade mold according to claim 3, characterized in that: The upper end surface of the lower mold (3) is provided with a docking groove (19), and the upper end surface of the upper mold (4) is fixedly mounted with a limit block (7), and the limit block (7) can enter the interior of the docking groove (19).

5. A self-demolding wind turbine blade mold according to claim 4, characterized in that: A fixing rod (20) is fixedly installed inside the docking groove (19), and a return spring (21) is sleeved on the outer side of the fixing rod (20), and a lifting plate (22) is slidably installed on the outer side of the fixing rod (20), and the lifting plate (22) is located at the upper end of the return spring (21), and a limit rod (23) is fixedly installed inside the lifting plate (22), and an adjustment rod (28) is fixedly installed at the lower end of the lifting plate (22), and a clamping block (24) is slidably installed inside the lifting plate (22), and the clamping block (24) is slidably connected to the limit rod (23) and the adjustment rod (28) respectively.

6. The self-demolding wind turbine blade mold according to claim 5, characterized in that: A rotating gear cylinder (26) is rotatably mounted on the upper end of the lifting plate (22), a fixed rack (27) is fixedly mounted inside the docking groove (19), a moving rack (25) is fixedly mounted on the outer side of the clamping block (24), and both the moving rack (25) and the fixed rack (27) are meshedly connected with the rotating gear cylinder (26), and the moving rack (25) and the fixed rack (27) are arranged vertically.

7. A demoulding method for a wind turbine blade mold with self-demolding properties according to claim 6, characterized in that: The following steps are involved: S1: The output shaft (17) and the second bevel gear (18) are driven to rotate by the operation of the driving motor (16), and the second bevel gear (18) drives the threaded rod (14) and the first bevel gear (15) to rotate. The rotation of the threaded rod (14) causes the lifting cylinder (10) to move upward and pushes the lifting plate (9) to move upward synchronously. At this time, the connecting rod (11) and the supporting rod (12) move upward with the lifting cylinder (10) to ensure the stability of the lifting cylinder (10). The upward movement of the lifting plate (9) causes the blade to separate from the lower mold (3), completing the demoulding process of the mold and improving the convenience of demoulding the mold. S2: The lifting plate (22) is squeezed by the limit block (7), so that the rotating gear cylinder (26) rotates under the action of the fixed rack (27) and drives the moving rack (25) to move. The movement of the moving rack (25) pushes the clamping block (24) to move and clamp the limit block (7), thereby limiting the position of the limit block (7), ensuring the accuracy of the docking of the lower mold (3) and the upper mold (4), and improving the accuracy of the blade docking; S3: The upper mold (4) squeezes the contact plate (32) so that the contact plate (32) and the squeezing rod (31) move downward. At this time, the squeezing rod (31) moves downward inside the exhaust pipe (29) and allows the gas inside the exhaust pipe (29) to be discharged through the exhaust hole (30). At this time, the downward movement speed of the squeezing rod (31) and the contact plate (32) can be slowed down, reducing the noise generated by the closing of the lower mold (3) and the upper mold (4), thereby improving the working comfort of the staff.

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