Propeller composite cap forming method and cap thereof

Abstract

The application discloses a propeller composite material cap forming method and a cap, the cap head metal mesh composite film layer and the multi-layer cap head pre-impregnated cloth layer are sequentially laid in the cavity of the cap head forming die, and the cap head is formed by a vacuum bag method; the cap tail metal mesh composite film layer and the multi-layer cap tail pre-impregnated cloth layer are sequentially laid in the cavity of the cap tail forming die, and the cap tail is formed by the vacuum bag method; the multi-layer cap inner plate pre-impregnated cloth and the aramid paper honeycomb layer are laid in the cavity of the cap inner plate forming die, the multi-layer cap inner plate pre-impregnated cloth and the aramid paper honeycomb layer are laid, the cap inner plate is formed by the vacuum bag method, and finally the cap head, the cap tail and the cap inner plate are fixed together to form the cap. The propeller composite material cap forming method and the cap are disclosed, the strength of the cap head, the cap tail and the cap inner plate is relatively large by the forming method, and the quality of the formed cap is relatively light.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of propeller cap, more particularly to a propeller composite cap forming method and the cap. BACKGROUND

[0002] The spinner for propeller includes two parts of mounting disc and cap, which are large-size special-shaped thin-wall parts and generally made of metal material. However, the spinner for propeller made of metal material is heavy, which is not conducive to the flight of the airplane. At present, the spinner for propeller gradually develops towards composite material, but the strength of the cap made of composite material is small and the service life is short.

[0003] Therefore, how to provide a propeller composite cap forming method and the cap with light weight and large strength is a problem to be solved by those skilled in the art. SUMMARY

[0004] Therefore, the present application provides a propeller composite cap forming method and the cap, which has large strength of the cap head, the cap tail and the cap inner plate, and light weight.

[0005] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0006] A propeller composite cap forming method comprises the following steps:

[0007] S1, cap head forming: the cap head metal mesh composite film layer is pasted into the cavity of the cap head forming die, and multiple layers of cap head prepreg layers are sequentially laid on the cap head metal mesh composite film layer to form a cap head semi-finished product, and the cap head semi-finished product is formed into a cap head by a vacuum bag method;

[0008] S2, cap tail forming: the cap tail metal mesh composite film layer is pasted into the cavity of the cap tail forming die, and multiple layers of cap tail prepreg layers are sequentially laid on the cap tail metal mesh composite film layer to form a cap tail semi-finished product, and the cap tail semi-finished product is formed into a cap tail by a vacuum bag method;

[0009] S3, cap inner plate forming: multiple layers of cap inner plate prepregs and aramid paper honeycomb layers are laid in the cavity of the cap inner plate forming die, and the aramid paper honeycomb layers are laid between the multiple layers of cap inner plate prepregs to form a cap inner plate semi-finished product, and the cap inner plate semi-finished product is formed into a cap inner plate by a vacuum bag method;

[0010] S4, fixing assembly, fixing the cap head, the cap tail and the cap inner plate together.

[0011] Preferably, the vacuum bag method forming the paddle cap head in step S1 comprises the following steps:

[0012] A1: sequentially laying a first isolation cloth and a first air permeable felt on the paddle cap head prepreg layer away from the paddle cap head metal mesh composite film layer;

[0013] A2: sealingly connecting a first vacuum bag to the paddle cap head forming mold, and the first vacuum bag covering the first air permeable felt through its bag opening;

[0014] A3: connecting the first vacuum bag to a vacuum system through a first metal pipe, and the vacuum system evacuating the first vacuum bag through the first metal pipe;

[0015] A4: placing the paddle cap head forming mold in step A3 into a curing oven, and the vacuum system continuing to evacuate the first vacuum bag through the first metal pipe, forming a paddle cap head after curing, then taking out the paddle cap head forming mold, removing the first isolation cloth and the first air permeable felt, and using a first ejection mechanism to eject the paddle cap head from the cavity of the paddle cap head forming mold.

[0016] Preferably, the vacuum bag method forming the paddle cap tail in step S2 comprises the following steps:

[0017] B1: sequentially laying a second isolation cloth and a second air permeable felt on the paddle cap tail prepreg layer away from the paddle cap tail metal mesh composite film layer;

[0018] B2: sealingly connecting a second vacuum bag to the paddle cap tail forming mold, and the second vacuum bag covering the second air permeable felt through its bag opening;

[0019] B3: connecting the second vacuum bag to the vacuum system through a second metal pipe, and the vacuum system evacuating the second vacuum bag through the second metal pipe;

[0020] B4: placing the paddle cap tail forming mold in step B3 into the curing oven, and the vacuum system continuing to evacuate the second vacuum bag through the second metal pipe, forming a paddle cap tail after curing, then taking out the paddle cap tail forming mold, removing the second isolation cloth and the second air permeable felt, and using the second ejection mechanism to eject the paddle cap tail from the cavity of the paddle cap tail forming mold.

[0021] Preferably, the vacuum bag method forming the paddle cap inner plate in step S3 comprises the following steps:

[0022] C1: sequentially laying a third isolation cloth and a third air permeable felt on the paddle cap inner plate prepreg away from the paddle cap inner plate forming mold;

[0023] C2: sealing and connecting a third vacuum bag on the inner panel forming mold of the paddle cap, and the third vacuum bag is provided with the third air-permeable felt through its bag opening cover;

[0024] C3: the third vacuum bag is connected to the vacuum system through a third metal pipe, and the vacuum system draws vacuum in the third vacuum bag through the third metal pipe;

[0025] C4: the inner panel forming mold of the paddle cap in step C3 is put into the curing oven, and the vacuum system keeps drawing vacuum in the third vacuum bag through the third metal pipe, and after curing, the inner panel of the paddle cap is formed, then the inner panel forming mold of the paddle cap is taken out, the third isolation cloth and the third air-permeable felt are removed, and the inner panel of the paddle cap is pushed out from the cavity of the inner panel forming mold of the paddle cap through the third ejection actuator.

[0026] Preferably, in step S3, the multi-layer inner panel pre-impregnated cloth of the paddle cap comprises:

[0027] a first skin cloth, which is laid in the cavity of the inner panel forming mold of the paddle cap;

[0028] a ring-in cloth, which is laid on the first skin cloth, and an aramid paper honeycomb layer, which is laid on the ring-in cloth;

[0029] a ring-out cloth, which is laid on the aramid paper honeycomb layer;

[0030] a second skin cloth, which is laid on the ring-out cloth.

[0031] Preferably, in step S1: the paddle cap head metal mesh composite film layer comprises: a plurality of paddle cap head metal mesh composite film strips cut and formed, and each of the plurality of paddle cap head metal mesh composite film strips is pasted into the cavity of the paddle cap head forming mold and is overlapped together two by two; the paddle cap tail metal mesh composite film layer comprises: a plurality of paddle cap tail metal mesh composite film strips cut and formed, and each of the plurality of paddle cap tail metal mesh composite film strips is pasted into the cavity of the paddle cap tail forming mold and is overlapped together two by two, and the overlapping width between adjacent two paddle cap head metal mesh composite film strips and the overlapping width between adjacent two paddle cap tail metal mesh composite film strips are both 10mm to 15mm.

[0032] Preferably, in step S1: each layer of the paddle cap head prepreg fabric includes: multiple paddle cap head prepreg fabric strips cut from the fabric, the multiple paddle cap head prepreg fabric strips being joined together in pairs, and the joining parts of adjacent layers of paddle cap head prepreg fabric being laid in an alternating manner. At the same time, the folds of each paddle cap head prepreg fabric strip are cut to form two paddle cap head prepreg fabric cut strips, and the two paddle cap head prepreg fabric cut strips are overlapped together.

[0033] Preferably, in step S2: each layer of the paddle cap tail prepreg fabric includes: multiple paddle cap tail prepreg fabric strips cut from the fabric, the multiple paddle cap tail prepreg fabric strips being joined together in pairs, and the joining parts of adjacent layers of paddle cap tail prepreg fabric being laid in an alternating manner. At the same time, the folds of each paddle cap tail prepreg fabric strip are cut to form two paddle cap tail prepreg fabric cut strips, and the two paddle cap tail prepreg fabric cut strips are overlapped together.

[0034] Preferably, in step S4, the specific steps for fixing the component are as follows:

[0035] D1: Fix the inner plate of the propeller cap onto the tooling;

[0036] D2: Adhesive is applied to the connection between the inner plate of the propeller cap and the tail of the propeller cap, and the tail of the propeller cap is glued to the inner plate of the propeller cap, while the tail of the propeller cap is fixed to the tooling.

[0037] D3: Adhesive is applied to the connection between the head and tail of the propeller cap, and the head of the propeller cap is glued to the tail of the propeller cap, while the head of the propeller cap is fixed to the tooling.

[0038] D4: After the adhesive joint between the tail of the propeller cap and the inner plate of the propeller cap and the head of the propeller cap has cured, apply sealant to the joint between the outer surfaces of the tail of the propeller cap and the head of the propeller cap to seal the joint between the outer surfaces of the tail of the propeller cap and the head of the propeller cap.

[0039] D5: Mounting holes are provided on the head of the propeller cap, the tail of the propeller cap, and the inner plate of the propeller cap at the adhesive bonding positions between the tail of the propeller cap, the inner plate of the propeller cap, and the head of the propeller cap. Rivets are fixed in the three mounting holes to securely connect the head of the propeller cap, the tail of the propeller cap, and the inner plate of the propeller cap.

[0040] D6: Apply adhesive again to the joints between the three mounting holes and the rivets, as well as at the connections between the tail of the propeller cap and the head of the propeller cap and the inner plate of the propeller cap, and allow it to cure.

[0041] A propeller cap made of composite material includes: a tail portion of the cap, and a head portion of the cap and an inner plate of the cap, both of which are fixedly connected to the tail portion of the cap.

[0042] The paddle cap head includes: a paddle cap head metal mesh composite film layer and multiple paddle cap head prepreg layers, wherein the multiple paddle cap head prepreg layers are laid sequentially and fixed on the paddle cap head metal mesh composite film layer.

[0043] The tail section of the propeller cap includes: a metal mesh composite film layer for the tail section of the propeller cap and multiple layers of prepreg fabric for the tail section of the propeller cap, and the multiple layers of prepreg fabric for the tail section of the propeller cap are laid sequentially and fixed on the metal mesh composite film layer for the tail section of the propeller cap.

[0044] The inner plate of the paddle cap includes: multiple layers of paddle cap inner plate prepreg fabric and an aramid paper honeycomb layer, and the aramid paper honeycomb layer is fixed between the multiple layers of the paddle cap inner plate prepreg fabric.

[0045] As can be seen from the above technical solution, compared with the prior art, the present invention discloses a method for molding a propeller cap made of composite material and the propeller cap thereof, which can achieve the following technical effects:

[0046] (1) The paddle cap formed by the present invention is relatively lightweight;

[0047] (2) The molding process of the present invention makes the head, tail and inner plate of the propeller cap have greater strength. Attached Figure Description

[0048] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0049] Figure 1 This is a cross-sectional view of the process of machining the paddle head in the paddle head forming mold according to the present invention;

[0050] Figure 2 This is a side view of the paddle cap tail forming mold of the present invention;

[0051] Figure 3 For the present invention Figure 2 Enlarged view of the structure at point A in the middle;

[0052] Figure 4 This is a schematic diagram showing the structural sequence of the layers of the inner plate of the propeller cap in the mold forming process of the inner plate of the propeller cap according to the present invention.

[0053] Figure 5 This is a side view of the invention fixed on the tooling;

[0054] Figure 6 for Figure 5 Enlarged view of the structure at point B.

[0055] Among them, 1-Paddle cap head; 11-Paddle cap head metal mesh composite film layer; 10-Paddle cap head forming mold; 12-Paddle cap head prepreg layer; 100-Paddle cap head semi-finished product; 2-Paddle cap tail; 21-Paddle cap tail metal mesh composite film layer; 20-Paddle cap tail forming mold; 22-Paddle cap tail prepreg layer; 200-Paddle cap tail semi-finished product; 3-Paddle cap inner plate; 30-Paddle cap inner plate forming mold; 31-Aramid paper honeycomb layer; 300-Paddle cap inner plate semi-finished product; 13-First isolation cloth; 14-First breathable felt; 15-First vacuum bag; 16-First metal tube; 17-First demolding block; 32-First skin cloth; 33-Inner ring cloth; 34-Outer ring cloth; 35-Second skin cloth; 500-Tooling; 400-Rivet; 18-First sealing putty strip. Detailed Implementation

[0056] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0057] This invention discloses a method for molding a propeller cap made of composite material, comprising the following steps:

[0058] S1, Paddle cap head 1 forming: The paddle cap head metal mesh composite film layer 11 is pasted into the cavity of the paddle cap head forming mold 10, and multiple layers of paddle cap head prepreg fabric layer 12 are sequentially laid on the paddle cap head metal mesh composite film layer 11 to form a paddle cap head semi-finished product 100. The paddle cap head semi-finished product 100 is formed into a paddle cap head 1 by vacuum bag method.

[0059] S2, Paddle cap tail 2 forming: The paddle cap tail metal mesh composite film layer 21 is pasted into the cavity of the paddle cap tail forming mold 20, and multiple layers of paddle cap tail prepreg fabric layer 22 are sequentially laid on the paddle cap tail metal mesh composite film layer 21 to form a paddle cap tail semi-finished product 200. The paddle cap tail semi-finished product 200 is formed into paddle cap tail 2 by vacuum bag method.

[0060] S3, Paddle cap inner plate 3 forming: Multiple layers of paddle cap inner plate prepreg fabric and aramid paper honeycomb layer 31 are laid in the cavity of the paddle cap inner plate forming mold 30, and the aramid paper honeycomb layer 31 is laid between the multiple layers of paddle cap inner plate prepreg fabric to form a paddle cap inner plate semi-finished product 300. The paddle cap inner plate semi-finished product 300 is formed into paddle cap inner plate 3 by vacuum bag method.

[0061] S4, a fixing component, which fixes the propeller head 1, the propeller tail 2, and the propeller inner plate 3 together.

[0062] By means of the above-described method of the present invention, the structure of the paddle cap head 1 is a composite structure of a paddle cap head metal mesh composite film layer 11 and a multi-layer paddle cap head prepreg layer 12, the structure of the paddle cap tail 2 is a composite structure of a paddle cap tail metal mesh composite film layer 21 and a multi-layer paddle cap tail prepreg layer 22, and the structure of the paddle cap inner plate 3 is a composite structure of a multi-layer paddle cap inner plate prepreg and an aramid paper honeycomb layer 31. Therefore, the paddle cap formed by fixing the paddle cap head 1, paddle cap tail 2 and paddle cap inner plate 3 together is lightweight and has high strength, and can be mass-produced.

[0063] To further optimize the above technical solution, the prepreg fabric layer 12 at the head of the propeller cap, the prepreg fabric layer 22 at the tail of the propeller cap, and the prepreg fabric of the inner plate of the propeller cap are all pre-matched and impregnated with resin.

[0064] The beneficial effects that can be achieved by adopting the above technical solution are as follows: during the forming process of the paddle cap head 1, paddle cap tail 2 and paddle cap inner plate 3, the paddle cap head metal mesh composite film layer 11 can be bonded to the multi-layer paddle cap head prepreg fabric layer 12 to form the paddle cap head semi-finished product 100, the paddle cap tail metal mesh composite film layer 21 can be bonded to the multi-layer paddle cap tail prepreg fabric layer 22 to form the paddle cap tail semi-finished product 200, and the aramid paper honeycomb layer 31 can be bonded to the multi-layer paddle cap inner plate prepreg fabric to form the paddle cap inner plate semi-finished product 300.

[0065] To further optimize the above technical solution, step S1, which involves vacuum bag forming of the paddle cap head 1, includes the following steps:

[0066] A1: The first isolation cloth 13 and the first breathable felt 14 are sequentially laid on the prepreg cloth layer 12 of the paddle head, which is away from the metal mesh composite film layer 11 of the paddle head.

[0067] A2: A first vacuum bag 15 is sealed and connected to the paddle head forming mold 10, and the first vacuum bag 15 covers the first breathable felt 14 through its bag cover.

[0068] A3: The first vacuum bag 15 is connected to the vacuum system through the first metal tube 16, and the vacuum system evacuates the first vacuum bag 15 through the first metal tube 16.

[0069] A4: Place the paddle head forming mold 10 from step A3 into the curing oven, and keep the vacuum system evacuating the first vacuum bag 15 through the first metal tube 16. After curing, the paddle head 1 is formed. Finally, remove the paddle head forming mold 10, and remove the first isolation cloth 13 and the first breathable felt 14. Use the first demolding block 17 to push the paddle head 1 out of the cavity of the paddle head forming mold 10.

[0070] The beneficial effects that can be achieved by adopting the above technical solution are as follows: the paddle cap head semi-finished product 100 can be solidified to form the paddle cap head 1, and the vacuum system can maintain the environment in which the paddle cap head semi-finished product 100 is located at a constant pressure through the first metal tube 16 to evacuate the first vacuum bag 15, so that the paddle cap head 1 is uniformly compressed during the molding process and the outer surface quality of the paddle cap head 1 is stable. In addition, the present invention can prevent the fibers on the first breathable felt 14 from sticking to the paddle cap head semi-finished product 100 through the first isolation cloth 13, so as to further improve the quality of the paddle cap head 1.

[0071] To further optimize the above technical solution, in step A2, the first vacuum bag 15 is sealed and connected to the paddle head forming mold 10 by the first sealing putty strip 18.

[0072] The beneficial effects that can be achieved by adopting the above technical solution are: ensuring the sealing of the connection between the first vacuum bag 15 and the paddle head forming mold 10, so as to improve the forming quality of the paddle head 1.

[0073] To further optimize the above technical solution, step S2, which involves vacuum bag forming of the paddle cap tail 2, includes the following steps:

[0074] B1: Lay the second isolation cloth and the second breathable felt sequentially on the prepreg cloth layer 22 at the tail of the propeller cap, away from the metal mesh composite film layer 21 at the tail of the propeller cap.

[0075] B2: A second vacuum bag is sealed and connected to the forming mold 20 at the tail of the paddle cap, and the second vacuum bag holds the second breathable felt through its bag cover;

[0076] B3: The second vacuum bag is connected to the vacuum system through the second metal tube, and the vacuum system evacuates the second vacuum bag through the second metal tube.

[0077] B4: Place the paddle cap tail forming mold 20 from step B3 into the curing oven, and keep the vacuum system evacuating the second vacuum bag through the second metal tube. After curing, the paddle cap tail 2 is formed. Finally, remove the paddle cap tail forming mold 20, and remove the second isolation cloth and the second breathable felt. Use the second mold release block to push the paddle cap tail 2 out of the cavity of the paddle cap tail forming mold 20.

[0078] The beneficial effects achieved by adopting the above-mentioned technical solution are as follows: the semi-finished product 200 of the paddle cap tail can be solidified to form the paddle cap tail 2, and the vacuum system can maintain the environment of the semi-finished product 200 of the paddle cap tail 2 at a constant pressure through the second metal tube, so that the paddle cap tail 2 is uniformly pressurized during the forming process, and the outer surface quality of the paddle cap tail 2 is stable. In addition, the invention can prevent the fibers on the second breathable felt from sticking to the semi-finished product 200 of the paddle cap tail through the second isolation cloth, so as to further improve the quality of the paddle cap tail 2.

[0079] To further optimize the above technical solution, in step B2, the second vacuum bag is sealed and connected to the paddle cap tail forming mold 20 by the second sealing putty strip.

[0080] The beneficial effects that can be achieved by adopting the above technical solution are: ensuring the sealing of the connection between the second vacuum bag and the paddle cap tail forming mold 20, so as to improve the forming quality of the paddle cap tail.

[0081] To further optimize the above technical solution, step S3, which involves vacuum bag forming of the inner plate 3 of the paddle cap, includes the following steps:

[0082] C1: Lay the third isolation cloth and the third breathable felt sequentially on the prepreg cloth of the inner plate of the propeller cap away from the inner plate forming mold 30 of the propeller cap.

[0083] C2: A third vacuum bag is sealed and connected to the inner plate forming mold 30 of the paddle cap, and the third vacuum bag is fitted with a third breathable felt through its bag cover.

[0084] C3: The third vacuum bag is connected to the vacuum system through the third metal tube, and the vacuum system evacuates the third vacuum bag through the third metal tube.

[0085] C4: Place the inner plate forming mold 30 of the paddle cap from step C3 into the curing oven, and keep the vacuum system evacuating the third vacuum bag through the third metal tube. After curing, the inner plate 3 of the paddle cap is formed. Finally, take out the inner plate forming mold 30 of the paddle cap, remove the third isolation cloth and the third breathable felt, and use the third mold release block to push the inner plate 3 of the paddle cap from the cavity of the inner plate forming mold 30.

[0086] The beneficial effects achieved by adopting the above-mentioned technical solution are as follows: the paddle cap inner plate semi-finished product 300 can be solidified to form the paddle cap inner plate 3, and the vacuum system can maintain the environment of the paddle cap inner plate semi-finished product 300 at a constant pressure by drawing a vacuum in the third vacuum bag through the third metal tube, so that the paddle cap inner plate 3 is uniformly compressed during the molding process, thereby improving the quality of the paddle cap inner plate 3. Furthermore, the invention can prevent the fibers on the third breathable felt from sticking to the paddle cap inner plate semi-finished product 300 through the third isolation cloth, thereby further improving the quality of the paddle cap inner plate 3.

[0087] To further optimize the above technical solution, in step C2, the third vacuum bag is sealed and connected to the inner plate forming mold 30 of the paddle cap by the third sealing putty strip.

[0088] The beneficial effects that can be achieved by adopting the above technical solution are: ensuring the sealing of the connection between the third vacuum bag and the paddle cap inner plate forming mold 30, so as to improve the forming quality of the paddle cap inner plate 3 and prevent air leakage during the forming process, which would lead to insufficient forming pressure.

[0089] To further optimize the above technical solution, the first isolation cloth 13, the second isolation cloth and the third isolation cloth are all made of PTFE cloth.

[0090] The beneficial effects that can be achieved by adopting the above technical solution are: lower cost and better effect of isolating impurities. At the same time, after the paddle cap head 1, paddle cap tail 2 or paddle cap inner plate 3 are formed, it is easy to remove the PTFE cloth.

[0091] To further optimize the above technical solution, the first metal tube 16, the second metal tube, and the third metal tube are all copper tubes.

[0092] The beneficial effects that can be achieved by adopting the above technical solution are: stable molding process, low cost, and mass production capability.

[0093] To further optimize the above technical solution, in step S3, the multi-layer paddle cap inner plate prepreg fabric includes:

[0094] The first skin fabric 32 is laid in the cavity of the inner plate forming mold 30 of the paddle cap;

[0095] The inner ring fabric 33 is laid on the first skin fabric 32, and the aramid paper honeycomb layer 31 is laid on the inner ring fabric 33.

[0096] Outer ring fabric 34 is laid on aramid paper honeycomb layer 31;

[0097] The second skin fabric 35 is laid on the outer ring fabric 34.

[0098] The first skin fabric 32, the inner ring fabric 33, the aramid paper honeycomb layer 31, the outer ring fabric 34, and the second skin fabric 35 are all multi-layered.

[0099] The beneficial effects that can be achieved by adopting the above technical solution are: its performance meets the product design requirements.

[0100] To further optimize the above technical solution, in step S1, the propeller head metal mesh composite film layer 11 includes: multiple propeller head metal mesh composite film strips formed by cutting, and the multiple propeller head metal mesh composite film strips are all pasted into the cavity of the propeller head forming mold 10 and overlapped together in pairs; the propeller tail metal mesh composite film layer 21 includes: multiple propeller tail metal mesh composite film strips formed by cutting, and the multiple propeller tail metal mesh composite film strips are all pasted into the cavity of the propeller tail forming mold 20 and overlapped together in pairs, and the overlap width between two adjacent propeller head metal mesh composite film strips and the overlap width between two adjacent propeller tail metal mesh composite film strips are both 10mm to 15mm.

[0101] The beneficial effects that can be achieved by adopting the above technical solution are: preventing the metal mesh composite film layer 11 of the cap head from slipping during the forming process of the cap head 1, which would lead to local material shortage.

[0102] To further optimize the above technical solution, in step S1: each paddle cap head prepreg fabric layer 12 includes: multiple paddle cap head prepreg fabric strips cut into shape, multiple paddle cap head prepreg fabric strips are joined together in pairs, and the joining parts of adjacent paddle cap head prepreg fabric layers 12 are laid in an alternating manner. At the same time, the folds of each paddle cap head prepreg fabric strip are cut open, and the cut parts are overlapped together.

[0103] The beneficial effects that can be achieved by adopting the above technical solution are: preventing cracking at the joint after the paddle cap head 1 is formed, and preventing wrinkles between the 12 layers of prepreg fabric at the paddle cap head.

[0104] To further optimize the above technical solution, in step S2: each paddle cap tail prepreg fabric layer 22 includes: multiple paddle cap tail prepreg fabric strips cut into shape, the multiple paddle cap tail prepreg fabric strips are joined together in pairs, and the joining parts of adjacent paddle cap tail prepreg fabric layers 22 are laid in an alternating manner. At the same time, the folds of each paddle cap tail prepreg fabric strip are cut open, and the cut parts are overlapped together.

[0105] The beneficial effects that can be achieved by adopting the above technical solution are: preventing cracking at the joint after the tail of the paddle cap 2 is formed, and preventing wrinkles between the prepreg layers 22 of the tail of the paddle cap.

[0106] To further optimize the above technical solution, the specific steps for fixing the component in step S4 are as follows:

[0107] D1: Fix the inner plate 3 of the propeller cap onto the fixture 500;

[0108] D2: Adhesive is applied to the connection between the inner plate 3 of the propeller cap and the tail 2 of the propeller cap, and the tail 2 of the propeller cap is glued to the inner plate 3 of the propeller cap. At the same time, the tail 2 of the propeller cap is fixed on the tooling 500.

[0109] D3: Adhesive is applied to the connection between the head 1 and the tail 2 of the propeller cap, and the head 1 of the propeller cap is glued to the tail 2 of the propeller cap. At the same time, the head 1 of the propeller cap is fixed on the tooling 500.

[0110] D4: After the adhesive joint between the tail 2 of the propeller cap and the inner plate 3 and the head 1 of the propeller cap has cured, apply sealant to the joint on the outer surface of the tail 2 of the propeller cap and the head 1 of the propeller cap to seal the joint on the outer surface of the tail 2 of the propeller cap and the head 1 of the propeller cap.

[0111] D5: Mounting holes are provided on the head 1, tail 2, and inner plate 3 of the propeller cap, corresponding to the bonding positions between the tail 2, inner plate 3, and head 1 of the propeller cap. Rivets 400 are fixed in the three mounting holes to securely connect the head 1, tail 2, and inner plate 3 of the propeller cap.

[0112] D6: Apply adhesive again to the joints between the three mounting holes and the rivets 400, as well as at the connections between the tail of the propeller cap 2 and the head of the propeller cap 1 and the inner plate of the propeller cap 3, and allow it to cure.

[0113] The beneficial effects that can be achieved by adopting the above technical solution are: making the connection between the propeller head 1, the propeller tail 2 and the propeller inner plate 3 more stable, and at the same time improving the sealing performance.

[0114] To further optimize the above technical solution, in step D4, the sealant is epoxy conductive adhesive.

[0115] The beneficial effects that can be achieved by adopting the above technical solution are: connecting the metal mesh composite film layer 11 of the propeller head 1 and the metal mesh composite film layer 21 of the propeller tail 2, so that the two are connected.

[0116] To further optimize the above technical solution, the inner plate 3 of the formed propeller cap has holes. Before step D1, rubber bands are inserted into the holes on the inner plate 3 of the propeller cap.

[0117] The beneficial effects that can be achieved by adopting the above technical solution are as follows: the hole can be expanded outward when the propeller head 1 and the propeller inner plate 3 are connected, resulting in better connection strength; the rubber hoop is used for positioning when assembling with other parts later.

[0118] A propeller cap made of composite material includes: a tail portion 2, a head portion 1 and an inner plate 3, both of which are fixedly connected to the tail portion 2.

[0119] The paddle head 1 includes: a paddle head metal mesh composite film layer 11 and a multi-layer paddle head prepreg fabric layer 12, and the multi-layer paddle head prepreg fabric layer 12 is laid and fixed on the paddle head metal mesh composite film layer 11 in sequence.

[0120] The propeller cap tail section 2 includes: a propeller cap tail metal mesh composite film layer 21 and a multi-layer propeller cap tail prepreg fabric layer 22, and the multi-layer propeller cap tail prepreg fabric layer 22 is laid and fixed on the propeller cap tail metal mesh composite film layer 21 in sequence.

[0121] The inner plate 3 of the paddle cap includes: a multi-layer paddle cap inner plate prepreg fabric and an aramid paper honeycomb layer 31, and the aramid paper honeycomb layer 31 is fixed between the multi-layer paddle cap inner plate prepreg fabric.

[0122] The structure of the paddle cap head 1 of the present invention is a composite structure of a paddle cap head metal mesh composite film layer 11 and a multi-layer paddle cap head prepreg fabric layer 12. The structure of the paddle cap tail 2 is a composite structure of a paddle cap tail metal mesh composite film layer 21 and a multi-layer paddle cap tail prepreg fabric layer 22. The structure of the paddle cap inner plate 3 is a composite structure of a multi-layer paddle cap inner plate prepreg fabric and an aramid paper honeycomb layer 31. Therefore, the paddle cap formed by fixing the paddle cap head 1, paddle cap tail 2 and paddle cap inner plate 3 together is lightweight, has high strength, and can be mass-produced.

[0123] To further optimize the above technical solution, the multi-layer paddle cap inner plate prepreg fabric includes:

[0124] The first skin fabric 32 is laid in the cavity of the inner plate forming mold 30 of the paddle cap;

[0125] The inner ring fabric 33 is laid on the first skin fabric 32, and the aramid paper honeycomb layer 31 is laid on the inner ring fabric 33.

[0126] Outer ring fabric 34 is laid on aramid paper honeycomb layer 31;

[0127] The second skin fabric 35 is laid on the outer ring fabric 34.

[0128] To further optimize the above technical solution, the propeller head metal mesh composite film layer 11 includes: multiple propeller head metal mesh composite film strips formed by cutting, and the multiple propeller head metal mesh composite film strips are all pasted into the cavity of the propeller head forming mold 10 and overlapped together in pairs; the propeller tail metal mesh composite film layer 21 includes: multiple propeller tail metal mesh composite film strips formed by cutting, and the multiple propeller tail metal mesh composite film strips are all pasted into the cavity of the propeller tail forming mold 20 and overlapped together in pairs, and the overlap width between two adjacent propeller head metal mesh composite film strips and the overlap width between two adjacent propeller tail metal mesh composite film strips are both 10mm to 15mm.

[0129] To further optimize the above technical solution, each paddle cap head prepreg layer 12 includes: multiple paddle cap head prepreg strips cut from the fabric, with the multiple paddle cap head prepreg strips joined together in pairs, and the joining parts of adjacent paddle cap head prepreg layers 12 being laid in an alternating manner. At the same time, the folds of each paddle cap head prepreg strip are cut to form two paddle cap head prepreg strips, and the two paddle cap head prepreg strips are overlapped together.

[0130] To further optimize the above technical solution, each paddle cap tail prepreg layer 22 includes: multiple paddle cap tail prepreg strips cut from the fabric, with the multiple paddle cap tail prepreg strips joined together in pairs, and the joining parts of adjacent paddle cap tail prepreg layers 22 being laid in an alternating manner. At the same time, the folds of each paddle cap tail prepreg strip are cut to form two paddle cap tail prepreg strips, and the two paddle cap tail prepreg strips are overlapped together.

[0131] To further optimize the above technical solution, the propeller cap tail 2 is bonded to the propeller cap inner plate 3 and the propeller cap head 1 respectively. At the same time, mounting holes are provided on the propeller cap head 1, propeller cap tail 2 and propeller cap inner plate 3 at the bonding positions between the propeller cap tail 2, propeller cap inner plate 3 and propeller cap head 1, and rivets 400 are inserted into the three mounting holes to fasten the propeller cap head 1, propeller cap tail 2 and propeller cap inner plate 3.

[0132] Example 1: This embodiment of the invention discloses a method for molding a propeller cap made of composite material, including the following steps:

[0133] S1, Paddle Cap Head 1 Forming: Multiple paddle cap head metal mesh composite film strips, cut and formed, are all pasted into the cavity of the paddle cap head forming mold 10, and overlapped together in pairs (overlap width is 10mm to 15mm), thereby forming the paddle cap head metal mesh composite film layer 11. The paddle cap head metal mesh composite film layer 11 is pasted into the cavity of the paddle cap head forming mold 10, and multiple layers of paddle cap head prepreg fabric 12 are sequentially laid on the paddle cap head metal mesh composite film layer 11 (each layer of paddle cap head... The prepreg layer 12 includes: multiple prepreg strips of paddle cap head formed by cutting, the multiple prepreg strips of paddle cap head are joined together in pairs, and the joining parts of two adjacent paddle cap head prepreg layers 12 are laid in an alternating manner. At the same time, the folds of each prepreg strip of paddle cap head are cut to form two prepreg strips of paddle cap head, and the two prepreg strips of paddle cap head are overlapped together to form a semi-finished paddle cap head 100. The semi-finished paddle cap head 100 is formed into a paddle cap head 1 by vacuum bag method.

[0134] The vacuum bag method for forming the paddle cap head 1 includes the following steps: A1: The first isolation cloth 13 (including but not limited to PTFE cloth) and the first breathable felt 14 are sequentially laid on the paddle cap head prepreg cloth layer 12 away from the paddle cap head metal mesh composite film layer 11.

[0135] A2: The first vacuum bag 15 is sealed and connected to the paddle head forming mold 10 by the first sealing putty strip 18, and the first vacuum bag 15 covers the first breathable felt 14 through its bag cover.

[0136] A3: The first vacuum bag 15 is connected to the vacuum system through the first metal tube 16 (including but not limited to copper tube), and the vacuum system evacuates the first vacuum bag 15 through the first metal tube 16;

[0137] A4: Place the paddle head forming mold 10 from step A3 into the curing oven, and keep the vacuum system evacuating the first vacuum bag 15 through the first metal tube 16. After curing, the paddle head 1 is formed. Finally, remove the paddle head forming mold 10 and remove the first isolation cloth 13 and the first breathable felt 14 (and remove the first vacuum bag 15 at the same time). Use the first mold release block 17 to push the paddle head 1 out of the cavity of the paddle head forming mold 10.

[0138] S2, Paddle Cap Tail 2 Forming: Multiple strips of paddle cap tail metal mesh composite film, cut and formed, are pasted into the cavity of the paddle cap tail forming mold 20, and overlapped in pairs (overlap width is 10mm to 15mm) to form a paddle cap tail metal mesh composite film layer 21. The paddle cap tail metal mesh composite film layer 21 is pasted into the cavity of the paddle cap tail forming mold 20, and multiple layers of paddle cap tail prepreg fabric layers 22 are sequentially laid on the paddle cap tail metal mesh composite film layer 21 (each layer of paddle cap tail... The prepreg layer 22 includes: multiple prepreg strips of paddle cap tail formed by cutting, the multiple prepreg strips of paddle cap tail joined together in pairs, and the joining parts of two adjacent paddle cap tail prepreg layers 22 are laid in an alternating manner. At the same time, the folds of each paddle cap tail prepreg strip are cut to form two paddle cap tail prepreg strips, and the two paddle cap tail prepreg strips are overlapped together to form a paddle cap tail semi-finished product 200. The paddle cap tail semi-finished product 200 is formed into a paddle cap tail 2 by vacuum bag method.

[0139] Step S2, which involves vacuum bag forming of the paddle cap tail section 2, includes the following steps:

[0140] B1: A second isolation cloth (including but not limited to PTFE cloth) and a second breathable felt are sequentially laid on the prepreg cloth layer 22 at the tail of the propeller cap, away from the metal mesh composite film layer 21 at the tail of the propeller cap.

[0141] B2: The second vacuum bag is sealed and connected to the tail mold 20 of the paddle cap by the second sealing putty strip, and the second vacuum bag is covered by the second breathable felt through its bag cover.

[0142] B3: The second vacuum bag is connected to the vacuum system through the second metal tube, and the vacuum system evacuates the second vacuum bag through the second metal tube (including but not limited to copper tube);

[0143] B4: Place the paddle cap tail forming mold 20 from step B3 into the curing oven, and keep the vacuum system evacuating the second vacuum bag through the second metal tube. After curing, the paddle cap tail 2 is formed. Finally, remove the paddle cap tail forming mold 20, and remove the second isolation cloth and the second breathable felt (at the same time remove the second vacuum bag). Use the second mold release block to push the paddle cap tail 2 out of the cavity of the paddle cap tail forming mold 20.

[0144] S3, Paddle cap inner plate 3 forming: In the cavity of the paddle cap inner plate forming mold 30, the first skin cloth 32 (at least two layers), the inner ring cloth 33 (at least two layers), the aramid paper honeycomb layer 31 (at least two layers), the outer ring cloth 34 (at least two layers) and the second skin cloth 35 (at least two layers) are laid in sequence to form the paddle cap inner plate semi-finished product 300. The paddle cap inner plate semi-finished product 300 is formed into the paddle cap inner plate 3 by vacuum bag method.

[0145] Step S3, which involves vacuum bag forming of the inner plate 3 of the paddle cap, includes the following steps:

[0146] C1: A third isolation cloth (including but not limited to PTFE cloth) and a third breathable felt are sequentially laid on the prepreg cloth of the inner plate of the propeller cap away from the inner plate forming mold 30 of the propeller cap.

[0147] C2: The third vacuum bag is sealed and connected to the inner plate forming mold 30 of the paddle cap by the third sealing putty strip, and the third vacuum bag is covered by the third breathable felt through its bag cover.

[0148] C3: The third vacuum bag is connected to the vacuum system through the third metal tube, and the vacuum system evacuates the third vacuum bag through the third metal tube (including but not limited to copper tube);

[0149] C4: Place the inner plate forming mold 30 of the paddle cap from step C3 into the curing oven, and keep the vacuum system evacuating the third vacuum bag through the third metal tube. After curing, the inner plate 3 of the paddle cap is formed. Finally, take out the inner plate forming mold 30 of the paddle cap, and remove the third isolation cloth and the third breathable felt (at the same time remove the third vacuum bag). Use the third mold release block to push the inner plate 3 of the paddle cap from the cavity of the inner plate forming mold 30.

[0150] S4, fixing component, fixing the propeller head 1, propeller tail 2 and propeller inner plate 3 together;

[0151] The specific steps for fixing the components are as follows:

[0152] D1: Fix the inner plate 3 of the propeller cap onto the fixture 500;

[0153] D2: Adhesive is applied to the connection between the inner plate 3 of the propeller cap and the tail 2 of the propeller cap, and the tail 2 of the propeller cap is glued to the inner plate 3 of the propeller cap. At the same time, the tail 2 of the propeller cap is fixed on the tooling 500.

[0154] D3: Adhesive is applied to the connection between the head 1 and the tail 2 of the propeller cap, and the head 1 of the propeller cap is glued to the tail 2 of the propeller cap. At the same time, the head 1 of the propeller cap is fixed on the tooling 500.

[0155] D4: After the adhesive joint between the tail 2 of the propeller cap and the inner plate 3 and the head 1 of the propeller cap has cured, apply sealant to the joint on the outer surface of the tail 2 of the propeller cap and the head 1 of the propeller cap to seal the joint on the outer surface of the tail 2 of the propeller cap and the head 1 of the propeller cap.

[0156] D5: Mounting holes are provided on the head 1, tail 2, and inner plate 3 of the propeller cap, corresponding to the bonding positions between the tail 2, inner plate 3, and head 1 of the propeller cap. Rivets 400 are fixed in the three mounting holes to securely connect the head 1, tail 2, and inner plate 3 of the propeller cap.

[0157] D6: Apply adhesive again to the joints between the three mounting holes and the rivets 400, as well as at the connections between the tail of the propeller cap 2 and the head of the propeller cap 1 and the inner plate of the propeller cap 3, and allow it to cure.

[0158] The propeller cap formed by the above method includes: a propeller cap tail 2, a propeller cap head 1 and a propeller cap inner plate 3, both of which are fixedly connected to the propeller cap tail 2.

[0159] The paddle head 1 includes: a paddle head metal mesh composite film layer 11 and a multi-layer paddle head prepreg fabric layer 12, and the multi-layer paddle head prepreg fabric layer 12 is laid and fixed on the paddle head metal mesh composite film layer 11 in sequence.

[0160] The propeller cap tail section 2 includes: a propeller cap tail metal mesh composite film layer 21 and a multi-layer propeller cap tail prepreg fabric layer 22, and the multi-layer propeller cap tail prepreg fabric layer 22 is laid and fixed on the propeller cap tail metal mesh composite film layer 21 in sequence.

[0161] The inner plate 3 of the paddle cap includes: a multi-layer paddle cap inner plate prepreg fabric and an aramid paper honeycomb layer 31, and the aramid paper honeycomb layer 31 is fixed between the multi-layer paddle cap inner plate prepreg fabric.

[0162] In this invention, all the prepreg fabrics are soaked in rubber liquid, and therefore all have adhesive properties, which can bond to other adjacent fabrics during the paddle cap forming process.

[0163] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0164] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for molding a propeller cap made of composite material, characterized in that, Includes the following steps: S1, Paddle head (1) forming: The paddle head metal mesh composite film layer (11) is pasted into the cavity of the paddle head forming mold (10), and multiple layers of paddle head prepreg fabric layer (12) are sequentially laid on the paddle head metal mesh composite film layer (11) to form a paddle head semi-finished product (100). The paddle head semi-finished product (100) is formed into a paddle head (1) by vacuum bag method. S2, Paddle cap tail (2) forming: The paddle cap tail metal mesh composite film layer (21) is pasted into the cavity of the paddle cap tail forming mold (20), and multiple layers of paddle cap tail prepreg fabric layer (22) are sequentially laid on the paddle cap tail metal mesh composite film layer (21) to form a paddle cap tail semi-finished product (200). The paddle cap tail semi-finished product (200) is formed into a paddle cap tail (2) by vacuum bag method. S3, Paddle cap inner plate (3) forming: Multiple layers of paddle cap inner plate prepreg and aramid paper honeycomb layer (31) are laid in the cavity of the paddle cap inner plate forming mold (30), and the aramid paper honeycomb layer (31) is laid between the multiple layers of paddle cap inner plate prepreg to form a paddle cap inner plate semi-finished product (300). The paddle cap inner plate semi-finished product (300) is formed into a paddle cap inner plate (3) by vacuum bag method. S4, fixing assembly, fixing the propeller head (1), the propeller tail (2) and the propeller inner plate (3) together; In step S4, the specific steps for fixing the component are as follows: D1: Fix the inner plate (3) of the propeller cap onto the tooling (500); D2: Adhesive is applied to the connection between the inner plate (3) of the propeller cap and the tail (2) of the propeller cap, and the tail (2) of the propeller cap is glued to the inner plate (3) of the propeller cap, while the tail (2) of the propeller cap is fixed to the tooling (500). D3: Adhesive is applied to the connection between the head (1) and the tail (2) of the propeller cap, and the head (1) of the propeller cap is glued to the tail (2) of the propeller cap. At the same time, the head (1) of the propeller cap is fixed on the tooling (500). D4: After the adhesive joint between the tail (2) of the propeller cap and the inner plate (3) of the propeller cap and the head (1) of the propeller cap is cured, apply sealant to the joint on the outer surface of the tail (2) of the propeller cap and the head (1) of the propeller cap to seal the joint on the outer surface of the tail (2) of the propeller cap and the head (1) of the propeller cap. D5: Mounting holes are provided on the propeller head (1), the propeller tail (2) and the propeller inner plate (3) at the bonding positions between the propeller tail (2), the propeller inner plate (3) and the propeller head (1), and rivets (400) are fixed in the three mounting holes to fasten the propeller head (1), the propeller tail (2) and the propeller inner plate (3); D6: Apply adhesive again to the joints between the three mounting holes and the rivets (400), and at the joints between the tail of the propeller cap (2) and the head of the propeller cap (1) and the inner plate of the propeller cap (3), and cure.

2. The method for molding a propeller cap made of composite material according to claim 1, characterized in that, The vacuum bag forming process for the paddle cap head (1) in step S1 includes the following steps: A1: A first isolation cloth (13) and a first breathable felt (14) are sequentially laid on the prepreg cloth layer (12) of the paddle cap head, which is away from the metal mesh composite film layer (11) of the paddle cap head; A2: A first vacuum bag (15) is sealed and connected to the paddle head forming mold (10), and the first vacuum bag (15) covers the first breathable felt (14) through its bag cover; A3: The first vacuum bag (15) is connected to the vacuum system through the first metal tube (16), and the vacuum system evacuates the first vacuum bag (15) through the first metal tube (16); A4: Place the paddle head forming mold (10) from step A3 into the curing oven, and keep the vacuum system evacuating the first vacuum bag (15) through the first metal tube (16). After curing, the paddle head (1) is formed. Finally, take out the paddle head forming mold (10), remove the first isolation cloth (13) and the first breathable felt (14), and push the paddle head (1) out of the cavity of the paddle head forming mold (10) through the first mold release block (17).

3. The method for molding a propeller cap made of composite material according to claim 1, characterized in that, The vacuum bag forming process for the paddle cap tail section (2) in step S2 includes the following steps: B1: A second isolation cloth and a second breathable felt are sequentially laid on the prepreg layer (22) at the tail of the propeller cap, away from the metal mesh composite film layer (21) at the tail of the propeller cap; B2: A second vacuum bag is sealed and connected to the forming mold (20) at the tail of the paddle cap, and the second vacuum bag covers the second breathable felt through its bag cover; B3: The second vacuum bag is connected to a vacuum system through a second metal tube, and the vacuum system evacuates the second vacuum bag through the second metal tube; B4: Place the paddle cap tail forming mold (20) from step B3 into the curing oven, and keep the vacuum system evacuating the second vacuum bag through the second metal tube. After curing, the paddle cap tail (2) is formed. Finally, take out the paddle cap tail forming mold (20), remove the second isolation cloth and the second breathable felt, and use the second mold release block to push the paddle cap tail (2) out of the cavity of the paddle cap tail forming mold (20).

4. The method for molding a propeller cap made of composite material according to claim 3, characterized in that, The vacuum bag forming process for the inner plate (3) of the paddle cap in step S3 includes the following steps: C1: A third isolation cloth and a third breathable felt are laid sequentially on the prepreg cloth of the inner plate of the paddle cap, away from the forming mold (30) of the inner plate of the paddle cap; C2: A third vacuum bag is sealed and connected to the inner plate forming mold (30) of the paddle cap, and the third vacuum bag covers the third breathable felt through its bag cover; C3: The third vacuum bag is connected to the vacuum system through a third metal tube, and the vacuum system evacuates the third vacuum bag through the third metal tube; C4: Place the inner plate forming mold (30) of the paddle cap in step C3 into the curing oven, and the vacuum system maintains the vacuum in the third vacuum bag through the third metal tube. After curing, the inner plate (3) of the paddle cap is formed. Finally, take out the inner plate forming mold (30), remove the third isolation cloth and the third breathable felt, and push the inner plate (3) of the paddle cap from the cavity of the inner plate forming mold (30) through the third mold release block.

5. The method for molding a propeller cap made of composite material according to claim 1, characterized in that, In step S3, the multilayer prepreg fabric of the inner plate of the paddle cap includes: The first skin fabric (32) is laid in the cavity of the inner plate forming mold (30) of the paddle cap; Inner ring fabric (33), the inner ring fabric (33) is laid on the first outer skin fabric (32), and the aramid paper honeycomb layer (31) is laid on the inner ring fabric (33); Outer ring fabric (34), which is laid on the aramid paper honeycomb layer (31); second skin fabric (35), which is laid on the outer ring fabric (34).

6. The method for molding a propeller cap made of composite material according to claim 1, characterized in that, In step S1: the propeller head metal mesh composite film layer (11) includes: multiple propeller head metal mesh composite film strips cut and formed, and multiple propeller head metal mesh composite film strips are pasted into the cavity of the propeller head forming mold (10) and overlapped together in pairs; the propeller tail metal mesh composite film layer (21) includes: multiple propeller tail metal mesh composite film strips cut and formed, and multiple propeller tail metal mesh composite film strips are pasted into the cavity of the propeller tail forming mold (20) and overlapped together in pairs, and the overlap width between two adjacent propeller head metal mesh composite film strips and the overlap width between two adjacent propeller tail metal mesh composite film strips are both 10mm to 15mm.

7. The method for molding a propeller cap made of composite material according to claim 1, characterized in that, In step S1: each layer of the paddle cap head prepreg fabric layer (12) includes: multiple paddle cap head prepreg fabric strips cut into shape, the multiple paddle cap head prepreg fabric strips are joined together in pairs, and the joining parts of adjacent paddle cap head prepreg fabric layers (12) are laid in an alternating manner. At the same time, the folds of each paddle cap head prepreg fabric strip are cut to form two paddle cap head prepreg fabric cut strips, and the two paddle cap head prepreg fabric cut strips are overlapped together.

8. The method for molding a propeller cap made of composite material according to claim 1, characterized in that, In step S2: each layer of the paddle cap tail prepreg fabric layer (22) includes: multiple paddle cap tail prepreg fabric strips cut into shape, the multiple paddle cap tail prepreg fabric strips are joined together in pairs, and the joining parts of two adjacent layers of paddle cap tail prepreg fabric layers (22) are laid in an alternating manner. At the same time, the folds of each paddle cap tail prepreg fabric strip are cut to form two paddle cap tail prepreg fabric cut strips, and the two paddle cap tail prepreg fabric cut strips are overlapped together.

9. A propeller cap made of composite material, manufactured using the propeller cap molding method according to any one of claims 1-8, characterized in that, include: The propeller cap tail (2), and the propeller cap head (1) and the propeller cap inner plate (3) are all fixedly connected to the propeller cap tail (2); The paddle head (1) includes: a paddle head metal mesh composite film layer (11) and multiple paddle head prepreg fabric layers (12), and the multiple paddle head prepreg fabric layers (12) are laid and fixed on the paddle head metal mesh composite film layer (11) in sequence. The tail section (2) of the propeller cap includes: a metal mesh composite film layer (21) of the tail section of the propeller cap and multiple layers of prepreg fabric (22) of the tail section of the propeller cap, and the multiple layers of prepreg fabric (22) of the tail section of the propeller cap are laid and fixed on the metal mesh composite film layer (21) of the tail section of the propeller cap. The inner plate (3) of the paddle cap includes: a multi-layer paddle cap inner plate prepreg fabric and an aramid paper honeycomb layer (31), and the aramid paper honeycomb layer (31) is fixed between the multi-layer paddle cap inner plate prepreg fabric.

Images