A folding propeller blade forming mold and a method of using the same

Abstract

The present application relates to the field of paddle forming die, especially to a folding propeller paddle forming die and its using method, the forming die comprises an upper die seat and a lower die seat, the upper end of the lower die seat is provided with multiple groups of cavities side by side, each group of cavities comprises a pair of center-symmetrically arranged paddle cavities, the paddle cavities of each group are communicated through a first channel, the surface of the lower die seat is provided with a second channel, the two ends of the second channel are provided with control seats for controlling the opening and closing state between the first channel and the second channel, the control seat is provided with a connecting channel in the center, and one end of the connecting channel is communicated with the first channel. The present application can realize the synchronous forming of multiple groups of paddles, improve the efficiency of hot pressing forming, and ensure that the forming environment of the left paddle and the right paddle is the same based on the same molten flowing resin, thereby ensuring that the structural strength of the left paddle and the right paddle remains highly consistent, and avoiding the influence on use due to the strength difference of the paddles.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of paddle forming die, in particular to a folding propeller paddle forming die and a using method thereof. BACKGROUND

[0002] The propeller of an aircraft is a key propulsion component in an aircraft, a drone and part of a spacecraft, which converts the mechanical energy of an engine into the reaction force of air through rotation to drive the aircraft forward. Its design integrates aerodynamics, material science and mechanical engineering, and directly affects the performance, efficiency and safety of the aircraft.

[0003] Among them, the folding propeller realizes the rapid switching of the paddle between the flight and folding states through the precise cooperation of the transmission shaft, the forward extension mechanism and the folding mechanism. At present, when the folding paddle is hot-pressed, two paddles are hot-pressed in different mold cavities, respectively. Even if in the same mold, the temperature and pressure of the flowing resin raw materials in different mold cavities will also have deviations, and the structural strength of the hot-pressed propeller is highly related to the temperature and pressure during hot pressing, so it will cause the strength performance of the two paddles to be different, and vibration will occur during use, affecting normal use. SUMMARY

[0004] The purpose of the present application is to provide a folding propeller paddle forming die and a using method thereof, which aims to solve the above technical problems.

[0005] The purpose of the present application can be realized by the following technical solutions:

[0006] A folding propeller paddle forming die, comprising an upper die seat and a lower die seat, the upper end of the lower die seat is provided with a plurality of groups of mold cavities side by side, each group of mold cavities comprises a pair of paddle cavities arranged in a central symmetry, the paddle cavities of each group are connected through a first channel, a second channel is arranged on the surface of the lower die seat, control seats for controlling the opening and closing state between the first channel and the second channel are arranged at both ends of the second channel, a connecting channel is arranged in the center of the control seat, one end of the connecting channel is connected with the first channel, the other end of the connecting channel is in line with and aligned with the second channel, a pair of closing blocks arranged in a central symmetry are rotatably installed at both ends of the connecting channel, the two closing blocks can be synchronously rotated by 90° to control the opening and closing of the connecting channel, and a locking block for locking the closing blocks is movably arranged on the inner wall of the connecting channel.

[0007] As a further scheme of the present application: the end of the paddle cavity is provided with a hub cavity, the hub cavity is provided with an assembly hole, the bottom of the upper die seat is provided with a paddle cavity, a hub cavity, a first channel and a second channel corresponding to the lower die seat, an assembly column is fixedly arranged in the hub cavity of the upper die seat, and the assembly column is correspondingly matched with the assembly hole.

[0008] As a further scheme of the present application: one end of the closing block is rotatably connected with the control seat through a pivot, the control seat is internally provided with a mounting cavity, a pair of transmission shafts one is centrally and symmetrically rotatably mounted in the mounting cavity, the bottom of the pivot extends into the mounting cavity and is connected with the transmission shaft one through a transmission belt, and a transmission gear is fixedly arranged on the transmission shaft one.

[0009] As a further scheme of the present application: the bottom of the mounting cavity is linearly slidably mounted with a set of longitudinally toothed plates which are centrally and symmetrically arranged, a micro motor is fixedly arranged at the center of the bottom of the control seat, a driving gear is fixedly connected with the output end of the micro motor, the driving gear is located between the two longitudinally toothed plates and is engaged with one side of the two longitudinally toothed plates, and the other side of the longitudinally toothed plate is engaged with a corresponding transmission gear.

[0010] As a further scheme of the present application: the tail of the locking block is fixedly provided with a stop block, the control seat is internally provided with a movable groove, the stop block is movably mounted in the movable groove, a compression spring is arranged between the stop block and the side wall of the movable groove, a guide column is fixedly connected with the stop block, the guide column is slidably mounted in a corresponding sliding groove, an L-shaped rod is fixedly connected with the bottom of the stop block, the L-shaped rod is movably mounted in a through groove at the bottom of the movable groove, and a transversely toothed plate is fixedly connected with the end of the L-shaped rod which extends into the mounting cavity.

[0011] As a further scheme of the present application: a set of transmission shafts two which are centrally and symmetrically arranged are rotatably mounted in the mounting cavity, an upper gear and a lower gear are respectively arranged on the transmission shafts two, the upper gear is engaged with the transversely toothed plate, an extension toothed plate is fixedly arranged on the upper end of the longitudinally toothed plate in a linear direction, the extension toothed plate is vertically arranged and alternately arranged above and below the transversely toothed plate, and the lower gear is engaged with the extension toothed plate.

[0012] As a further scheme of the present application: the two ends of the connecting channel are fixedly provided with blocking portions, the closing block abuts against the blocking portions after being rotated by 90°, the side wall of the connecting channel is provided with accommodating grooves, and the closing block is adaptively embedded into a corresponding accommodating groove after being reversely rotated by 90°.

[0013] As a further scheme of the present application: the upper end of the lower die seat is provided with positioning holes which are distributed at four corners, the bottom end of the upper die seat is provided with positioning pins which are distributed at four corners, and the positioning pins and the positioning holes are one-to-one correspondingly arranged.

[0014] The application also provides a use method of the folding propeller blade forming die.

[0015] Step one: mold pretreatment, remove impurities on the lower die seat and the upper die seat, uniformly spray release agent in the cavity, and then lay the cut carbon fiber prepreg layers into corresponding cavities;

[0016] Step two: hot pressing, the lower mold base is pressed to make it close to the lower mold base, and the pressure and heat are started, and the resin matrix in the prepreg is started to melt and flow by hot pressing;

[0017] Step three: opening and closing control, when the control seat controls the opening of the connecting channel, the molten resin will flow in all the cavities, and when the connecting channel is closed, the molten resin will flow independently in the respective cavities.

[0018] Step four: cooling and demolding, after the molten material is hot pressed, the pressure is released and the temperature is lowered, and the clamp is operated for demolding.

[0019] The beneficial effects of the present application are:

[0020] (1) By setting the first channel, the second channel and the control seat, when the control seat is rotated 90° by the blocking block to open the connecting channel, each group of paddle cavities is connected to each other through the second channel and the connecting channel, and the paddle cavities are connected to each other through the first channel. During hot pressing, the molten material flows synchronously in the connected paddle cavities, which not only enables multiple groups of paddles to be formed synchronously, improving the hot pressing efficiency, but also ensures that the forming environment of the left paddle and the right paddle is the same, thereby ensuring that the structural strength of the left paddle and the right paddle remains highly consistent, avoiding the influence of the strength difference of the paddles.

[0021] (2) When the control seat is reversely rotated 90° by the blocking block to close the connecting channel, the paddle cavities are connected to each other through the first channel at this time, but each group of cavities is closed and isolated from each other, maintaining their independent forming environment. By controlling the different temperatures and pressures of the molten flowing resin in each group of cavities, different structural strength paddle groups can be hot pressed on one set of molds as needed, and the left paddle and the right paddle of the paddle group can still maintain consistent structural strength.

[0022] (3) When the two longitudinal tooth plates are reversely slid synchronously, the lower gear is rotated and the second transmission shaft is rotated by the extension tooth plate, the corresponding horizontal tooth plate is linearly moved by the second transmission shaft through the upper gear, and the locking block is linearly displaced by the L-shaped rod. When the blocking block is closed, the locking block will just pop out from the side wall of the connecting channel and block the blocking block, avoiding the deflection of the blocking block during hot pressing, thereby improving the blocking effect. When the blocking block is opened, the locking block can retreat in time, so that the blocking block can be smoothly opened. The opening and closing process of the blocking block and the locking process of the locking block are mutually coordinated and linked, and the transmission process is reliable and stable. BRIEF DESCRIPTION OF DRAWINGS

[0023] The present application will be further described below with reference to the accompanying drawings.

[0024] Figure 1is the overall structure schematic diagram of the present application.

[0025] Figure 2 is the structure schematic diagram of the lower die holder in the present application.

[0026] Figure 3 is the structure schematic diagram of the upper die holder in the present application.

[0027] Figure 4 is the structure schematic diagram of the control holder in the present application.

[0028] Figure 5 is the structure schematic diagram of the sealing block in the present application.

[0029] Figure 6 is the internal structure schematic diagram of the control holder in the present application.

[0030] Figure 7 is Figure 6 is the enlarged structure schematic diagram at A in the figure.

[0031] Figure 8 is the internal structure schematic diagram of the mounting cavity in the present application.

[0032] Figure 9 is the transmission structure schematic diagram of the sealing block and the locking block in the present application.

[0033] Figure 10 is the state schematic diagram when the first channel and the second channel are communicated in the present application.

[0034] Figure 11 is the structure schematic diagram of the assembled folding paddle in the present application.

[0035] In the figure: 1, lower die holder; 11, positioning hole; 12, first channel; 13, second channel; 2, paddle cavity; 21, paddle hub cavity; 22, assembly hole; 3, upper die holder; 31, positioning pin; 32, assembly column; 4, control holder; 41, connecting channel; 411, blocking part; 412, containing groove; 42, sealing block; 421, pivot; 422, transmission belt; 43, locking block; 431, stop block; 432, compression spring; 433, guide column; 434, L-shaped rod; 435, transverse tooth plate; 44, mounting cavity; 45, transmission shaft one; 451, transmission tooth; 46, transmission shaft two; 461, upper gear; 462, lower gear; 47, micro motor; 471, driving tooth; 48, longitudinal tooth plate; 481, extension tooth plate. DETAILED DESCRIPTION

[0036] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of the present application.

[0037] Please refer to Figures 1-4 As shown in the drawings, the present application is a folding propeller blade forming die, which comprises an upper die seat 3 and a lower die seat 1. The upper end of the lower die seat 1 is provided with a plurality of groups of cavities in parallel. Each group of cavities comprises a pair of blade cavities 2 arranged in central symmetry. The blade cavities 2 of each group are connected through a first channel 12. The surface of the lower die seat 1 is provided with a second channel 13. The two ends of the second channel 13 are provided with control seats 4 for controlling the opening and closing state between the first channel 12 and the second channel 13. The control seat 4 is centrally provided with a connecting channel 41. One end of the connecting channel 41 is connected with the first channel 12, and the other end of the connecting channel 41 is in alignment with the second channel 13. The connecting channel 41 is rotatably installed with a pair of closing blocks 42 arranged in central symmetry at both ends. The two closing blocks 42 can be synchronously rotated by 90° to control the opening and closing of the connecting channel 41. The inner wall of the connecting channel 41 is movably provided with locking blocks 43 for locking the closing blocks 42.

[0038] As Figure 10 and Figure 11 shown, specifically, by setting the first channel 12, the second channel 13 and the control seat 4, when the control seat 4 rotates 90° by the closing block 42 to open the connecting channel 41, each group of blade cavities 2 is connected through the second channel 13 and the connecting channel 41, and at the same time, the blade cavities 2 are connected through the first channel 12. During hot pressing forming, the molten material flows synchronously in the connected blade cavities 2. Not only can multiple groups of blades be formed synchronously, but also the hot pressing forming efficiency is improved. Moreover, the forming process is based on the same molten flowing resin, which ensures that the forming environment of the left blade and the right blade is the same, thereby ensuring that the structural strength of the left blade and the right blade remains highly consistent, avoiding the influence of the difference in blade strength on use.

[0039] More specifically, when the control seat 4 reversely rotates 90° by the closing block 42 to close the connecting channel 41, at this time, the blade cavities 2 are connected through the first channel 12, but each group of cavities is mutually closed and isolated, maintaining their independent forming environment. By controlling the different temperatures and pressures of the molten flowing resin in each group of cavities, different structural strength blade groups can be hot pressed on one set of die according to needs, and the left blade and the right blade of the blade group can still maintain consistent structural strength.

[0040] As Figure 3As shown, the end of the blade cavity 2 is provided with a hub cavity 21, and the hub cavity 21 is provided with an assembly hole 22. The bottom of the upper die seat 3 is provided with the blade cavity 2, the hub cavity 21, the first channel 12 and the second channel 13 corresponding to the lower die seat 1. The hub cavity 21 of the upper die seat 3 is fixedly provided with an assembly column 32 corresponding to the assembly hole 22.

[0041] Specifically, when the mold is closed, the upper die seat 3 and the blade cavity 2 and the hub cavity 21 in the lower die seat 1 correspond to each other to form a complete cavity. At the same time, the first channel 12 and the second channel 13 also correspond to each other to ensure that the molten resin can smoothly flow between the blade cavities 2. The assembly column 32 and the assembly hole 22 are matched, so that the mounting hole position can be smoothly formed on the hub of the formed blade.

[0042] As shown in Figures 5-9 The end of the sealing block 42 is pivotally connected to the control seat 4 through a pivot 421. The control seat 4 is internally provided with a mounting cavity 44. A pair of transmission shafts 45 are centrally and symmetrically rotatably installed in the mounting cavity 44. The bottom of the pivot 421 extends into the mounting cavity 44 and is connected to the transmission shaft 45 through a transmission belt 422. The transmission shaft 45 is fixedly provided with a transmission gear 451.

[0043] Further, a group of longitudinally toothed plates 48 are centrally and symmetrically installed in the bottom of the mounting cavity 44. A micro motor 47 is fixedly arranged in the bottom of the control seat 4. A driving gear 471 is fixedly connected to the output end of the micro motor 47. The driving gear 471 is located between the two longitudinally toothed plates 48 and is engaged with one side of the two longitudinally toothed plates 48. The other side of the longitudinally toothed plate 48 is engaged with the corresponding transmission gear 451.

[0044] Specifically, when the micro motor 47 is started, the driving gear 471 rotates, driving the two-sided longitudinally toothed plates 48 to slide linearly in opposite directions. When the two longitudinally toothed plates 48 slide in opposite directions, they will drive the corresponding transmission gears 451 and transmission shafts 45 to rotate. The transmission shaft 45 will drive the corresponding pivot 421 to rotate through the transmission belt 422, so that the two sealing blocks 42 at both ends can rotate synchronously, thereby realizing the synchronous opening and closing control of the connecting channel 41 at both ends.

[0045] As shown in Figures 5-9 The tail of the locking block 43 is fixedly provided with a stop block 431. The control seat 4 is internally provided with a movable slot. The stop block 431 is movably installed in the movable slot. A compression spring 432 is arranged between the stop block 431 and the side wall of the movable slot. A guide column 433 is fixedly connected to the stop block 431. The guide column 433 is slidably installed in the corresponding sliding slot. An L-shaped rod 434 is fixedly connected to the bottom of the stop block 431. The L-shaped rod 434 is movably installed in the through slot at the bottom of the movable slot. The L-shaped rod 434 extends into the mounting cavity 44 and is fixedly connected with a transverse gear plate 435 at the end.

[0046] Further, a set of transmission shafts two 46 arranged in a central symmetry are rotatably installed in the mounting cavity 44. The upper gear 461 and the lower gear 462 are respectively sleeved on the transmission shafts two 46. The upper gear 461 is engaged with the transverse toothed plate 435. The extension toothed plate 481 is linearly arranged at the upper end of the longitudinal toothed plate 48. The extension toothed plate 481 is vertically arranged and staggered with the transverse toothed plate 435. The lower gear 462 is engaged with the extension toothed plate 481.

[0047] Specifically, when the two longitudinal toothed plates 48 are synchronously and reversely slid, the extension toothed plate 481 drives the lower gear 462 and the transmission shafts two 46 to rotate. The transmission shafts two 46 drive the corresponding transverse toothed plate 435 to move linearly through the upper gear 461, and drive the locking block 43 to move linearly through the L-shaped rod 434. When the closing block 42 is closed, the locking block 43 protrudes from the side wall of the connecting channel 41 and blocks the closing block 42, avoiding the deflection of the closing block 42 during the hot pressing process, thereby improving the sealing effect. When the closing block 42 is opened, the locking block 43 can be timely retracted, so that the closing block 42 can be smoothly opened. The opening and closing process of the closing block 42 and the locking process of the locking block 43 are mutually coordinated and linked, and the transmission process is reliable and stable.

[0048] As shown in Figure 5 , the connecting channel 41 is fixedly provided with a blocking portion 411 at both ends. The closing block 42 abuts against the blocking portion 411 after being rotated by 90°. The side wall of the connecting channel 41 is provided with a receiving groove 412. The closing block 42 is adapted to be embedded into the corresponding receiving groove 412 after being reversely rotated by 90°.

[0049] Specifically, the blocking portion 411 is used to limit the closing block 42 in cooperation with the locking block 43, so that the closing block 42 is fixed and sealed during the hot pressing process. The receiving groove 412 provides a receiving space for the closing block 42 when it is opened, so that the connecting channel 41 remains unobstructed.

[0050] As shown in Figure 2 and Figure 3 , the upper end of the lower die seat 1 is provided with a positioning hole 11 at four corners. The bottom end of the upper die seat 3 is provided with a positioning pin 31 at four corners. The positioning pin 31 is arranged in one-to-one correspondence with the positioning hole 11. The positioning cooperation of the positioning pin 31 and the positioning hole 11 can ensure that the upper die seat 3 and the lower die seat 1 are accurately clamped, avoiding relative movement of the two during the hot pressing process, and improving the processing precision.

[0051] The working principle of the present application is as follows: in use, first, the mold is pretreated, impurities on the lower mold base 1 and the upper mold base 3 are removed, and the mold release agent is uniformly sprayed in the cavity, then the cut carbon fiber prepreg is laid in the corresponding cavity, then the upper mold base 3 is pressed to make it close to the lower mold base 1, and the pressure and heating are started, and the resin matrix in the prepreg starts to melt and flow through hot pressing. When the control seat 4 rotates 90° by using the closing block 42 to make the connecting channel 41 open, each group of paddle cavities 2 are connected to each other through the second channel 13 and the connecting channel 41, and the paddle cavities 2 are connected to each other through the first channel 12. During hot pressing, the molten material flows synchronously in the connected paddle cavities 2, which not only can form multiple groups of paddles synchronously, but also can improve the hot pressing efficiency. Moreover, the forming environment of the left paddle and the right paddle is the same, which ensures that the structural strength of the left paddle and the right paddle is highly consistent, thereby avoiding the influence of the strength difference of the paddles on the use. When the control seat 4 reversely rotates 90° by using the closing block 42 to make the connecting channel 41 closed, the paddle cavities 2 are connected to each other through the first channel 12 at this time, but each group of cavities is closed and isolated from each other, thereby maintaining the independent forming environment. By controlling the different temperature and pressure of the molten flowing resin in each group of cavities, different structural strength paddle groups can be hot pressed on one set of mold according to the needs, and the left paddle and the right paddle of the paddle group can still maintain the same structural strength. When the closing block 42 is closed, the locking block 43 will just pop up from the side wall of the connecting channel 41 and block the closing block 42, thereby avoiding the deflection of the closing block 42 during hot pressing, thereby improving the closing effect. When the closing block 42 is opened, the locking block 43 can retreat in time, so that the closing block 42 can be smoothly opened. After the molten material is hot pressed, the pressure and temperature are started to be released, and the mold release treatment is operated.

[0052] The present application also provides a use method of the folding propeller paddle forming mold, which adopts the folding propeller paddle forming mold and comprises the following steps.

[0053] Step one: mold pretreatment, remove impurities on the lower mold base 1 and the upper mold base 3, and uniformly spray the mold release agent in the cavity, then lay the cut carbon fiber prepreg in the corresponding cavity;

[0054] Step two: hot pressing, press the upper mold base 3 to make it close to the lower mold base 1, start to press and heat, and make the resin matrix in the prepreg start to melt and flow through hot pressing;

[0055] Step three: opening and closing control, when the control seat 4 controls the connecting channel 41 to be opened, the molten resin will flow in all cavities, and when the connecting channel 41 is closed, the molten resin will flow independently in each cavity;

[0056] Step four: cooling and demolding, after the hot-pressing of the molten material, the pressure is released and the temperature is decreased, and the clamp is operated to demold.

[0057] The above has described one embodiment of the present application in detail, but the content is only the preferred embodiment of the present application and cannot be considered to limit the implementation scope of the present application. Any equivalent changes and improvements made according to the scope of the present application should still belong to the patent coverage of the present application.

Claims

1. A folding propeller blade forming mold, comprising an upper mold base (3) and a lower mold base (1), characterized in that, The upper end of the lower mold base (1) is provided with multiple sets of cavities arranged side by side. Each set of cavities includes a pair of blade cavities (2) arranged in a centrally symmetrical manner. The blade cavities (2) of each set are connected by a first channel (12). The surface of the lower mold base (1) is provided with a second channel (13). The two ends of the second channel (13) are provided with control seats (4) for controlling the opening and closing state between the first channel (12) and the second channel (13). The control seat (4) is provided with a connecting channel (41) in the center. One end of the connecting channel (41) is connected to the first channel (12), and the other end of the connecting channel (41) is aligned with the second channel (13). The two ends of the connecting channel (41) are rotatably installed with centrally symmetrical closing blocks (42). The two closing blocks (42) can rotate 90° synchronously to control the opening and closing of the connecting channel (41). The inner wall of the connecting channel (41) is movably provided with locking blocks (43) for locking the closing blocks (42). One end of the closed block (42) is rotatably engaged with the control seat (4) via a pivot (421). The control seat (4) has an installation cavity (44) inside. A pair of drive shafts (45) are symmetrically rotatably mounted in the center of the installation cavity (44). The bottom of the pivot (421) extends into the installation cavity (44) and is connected to the drive shafts (45) via a drive belt (422). Drive gears (451) are fixedly sleeved on the drive shafts (45). A set of longitudinal toothed plates (48) arranged in a centrally symmetrical manner are linearly slidably installed at the bottom of the mounting cavity (44). A micro motor (47) is fixedly installed at the center of the bottom of the control seat (4). A drive tooth (471) is fixedly connected to the output end of the micro motor (47). The drive tooth (471) is located between the two longitudinal toothed plates (48) and meshes with one side of the two longitudinal toothed plates (48) at the same time. The other side of the longitudinal toothed plate (48) meshes with the corresponding transmission tooth (451).

2. The folding propeller blade forming mold according to claim 1, characterized in that, The blade cavity (2) is provided with a hub cavity (21) at the end. The hub cavity (21) is provided with an assembly hole (22). The bottom of the upper mold base (3) is provided with a blade cavity (2), a hub cavity (21), a first channel (12) and a second channel (13) corresponding to the lower mold base (1). An assembly column (32) is fixedly provided in the hub cavity (21) of the upper mold base (3). The assembly column (32) is adapted to the assembly hole (22).

3. The folding propeller blade forming mold according to claim 1, characterized in that, The locking block (43) is fixedly provided with a stop block (431) at its tail. The control seat (4) is provided with a movable groove. The stop block (431) is movably installed in the movable groove. A compression spring (432) is provided between the stop block (431) and the side wall of the movable groove. A guide post (433) is fixedly connected to the stop block (431). The guide post (433) is slidably installed in the corresponding sliding groove. An L-shaped rod (434) is fixedly connected to the bottom of the stop block (431). The L-shaped rod (434) is movably installed in the through groove at the bottom of the movable groove. The L-shaped rod (434) extends into the mounting cavity (44) and is fixedly connected to a transverse toothed plate (435) at its end.

4. The folding propeller blade forming mold according to claim 3, characterized in that, A set of centrally symmetrical transmission shafts (46) are rotatably installed in the mounting cavity (44). An upper gear (461) and a lower gear (462) are respectively sleeved on the transmission shafts (46). The upper gear (461) meshes with the horizontal gear plate (435). An extension gear plate (481) is fixed at the upper end of the longitudinal gear plate (48) along the straight direction. The extension gear plate (481) and the horizontal gear plate (435) are staggered and vertically arranged. The lower gear (462) meshes with the extension gear plate (481).

5. The folding propeller blade forming mold according to claim 1, characterized in that, The two ends of the connecting channel (41) are fixed with blocking parts (411). The sealing block (42) abuts against the blocking part (411) after rotating 90°. The side wall of the connecting channel (41) is provided with a receiving groove (412). The sealing block (42) is adapted to be embedded into the corresponding receiving groove (412) after rotating 90° in the opposite direction.

6. The folding propeller blade forming mold according to claim 1, characterized in that, The lower mold base (1) has positioning holes (11) distributed at the four corners of its upper end, and the upper mold base (3) has positioning pins (31) distributed at the four corners of its bottom end. The positioning pins (31) and positioning holes (11) are arranged in a one-to-one correspondence.

7. A method of using a folding propeller blade forming mold, comprising using the folding propeller blade forming mold as described in claim 1, characterized in that, Includes the following steps: Step 1: Mold pretreatment, remove impurities from the lower mold base (1) and the upper mold base (3), and spray release agent evenly in the cavity. Then lay the cut carbon fiber prepreg into the corresponding cavity. Step 2: Hot pressing molding, press the upper mold base (3) down to make it close with the lower mold base (1), start pressurizing and heating, and make the resin matrix in the prepreg begin to melt and flow through hot pressing; Step 3: Opening and closing control. When the control seat (4) controls the connection channel (41) to open, the molten resin will flow in all cavities. When the control connection channel (41) is closed, the molten resin will flow independently in each cavity. Step 4: Cooling and demolding. After the molten material is hot-pressed into shape, the pressure is released and the temperature is lowered. The clamps are then used to demold the material.

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