Propeller integral molding die

Abstract

The utility model belongs to aerospace technology field, concretely relates to a propeller integral forming die, the utility model discloses a propeller integral forming die includes first mould and second mould, and the first mould has the profiling groove, and the second mould has the profiling boss, and the second mould and first mould buckle and connect, and the profiling boss is used for and the profiling groove plug-in and form propeller forming cavity. Using the propeller integral forming die in the technical scheme can realize the integrated forming of propeller, and the propeller prepared using the propeller integral forming die can significantly improve the structural reliability of equipment propulsion system, reduces the assembly error, and is convenient for dynamic balance debugging.

Description

Technical Field

[0001] This utility model belongs to the field of aerospace technology, specifically relating to an integral propeller molding die. Background Technology

[0002] Propeller blades, as the core component of aircraft propulsion systems, have extremely wide applications in the aerospace field. Whether it's fixed-wing drones, rotary-wing aircraft, or modern airships, propellers are commonly used as the power output device in their propulsion systems. With the development of composite material technology, carbon fiber reinforced resin matrix composites, due to their excellent specific strength and specific stiffness characteristics, have become the preferred material for manufacturing high-performance propellers.

[0003] Currently, composite material propellers for drones are mainly manufactured using compression molding. Traditional manufacturing methods typically involve molding each blade individually, meaning each blade is manufactured separately and then assembled via a hub. While this method is simple, it has significant drawbacks for multi-bladed structures (such as four-bladed or six-bladed propellers): First, the installation of each blade requires extremely high positioning accuracy, making the assembly process complex and labor-intensive; second, because each blade is manufactured independently, its geometric parameters and material distribution may have slight differences, making it difficult to guarantee overall dynamic balance performance and requiring tedious dynamic balancing adjustments; furthermore, the mechanical strength of the connection points often becomes the weakest link in the entire propulsion system.

[0004] Therefore, there is an urgent need to provide a propeller integral molding mold that can achieve integral molding to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a propeller integral molding mold capable of achieving integral molding. This purpose is achieved through the following technical solution:

[0006] The first aspect of this utility model provides a propeller integral molding mold, comprising:

[0007] A first mold, the first mold having a contour groove;

[0008] The second mold has a contoured protrusion, and the second mold and the first mold are fastened together. The contoured protrusion is used to insert into the contoured groove to form a propeller forming cavity.

[0009] The integral molding mold for the propeller in this technical solution enables the one-time integral molding of the propeller. This integral molding method ensures that each blade has completely consistent geometric features and material distribution, fundamentally eliminating assembly errors. Since each blade and hub forms a continuous integral structure, it not only improves the structural reliability of the propulsion system of equipment (UAVs, airships, and aircraft, etc.) but also significantly simplifies the subsequent dynamic balancing process. Furthermore, the integral molding structure eliminates the need for blade and hub assembly, reducing assembly workload, avoiding stress concentration at connection points, and resulting in better fatigue performance and a longer service life for the propeller. After the second mold and the first mold are closed, the contoured protrusions embed into the contoured grooves to form the propeller molding cavity, thus achieving high blade molding precision, effectively avoiding blade trimming issues, and preventing glue leakage during the molding process.

[0010] In addition, the propeller integral molding mold of this utility model may also have the following additional technical features:

[0011] In some embodiments of this utility model, the propeller integral molding mold further includes a guide assembly, which includes a guide post and a guide sleeve. The guide post is connected to the first mold, and the guide sleeve is connected to the second mold. The guide post is used to insert into the guide sleeve.

[0012] In some embodiments of this utility model, the guide post includes an insertion end, a first positioning part, and a connecting end connected in sequence. The insertion end is used to insert into the guide sleeve. The first positioning part abuts against the side of the first mold facing the second mold. The connecting end is inserted into the first mold.

[0013] In some embodiments of this utility model, the first positioning part is connected to the first mold by bolts.

[0014] In some embodiments of this utility model, the guide sleeve includes a second positioning part and a sleeve part. The sleeve part is inserted into the second mold and has an insertion cavity. The second positioning part and the side of the second mold facing the first mold abut against each other. The second positioning part has a through hole communicating with the insertion cavity, and the insertion end can be inserted into the insertion cavity through the through hole.

[0015] In some embodiments of this utility model, a paddle tip block is provided inside the contour groove, and the paddle tip block is used for paddle tip forming.

[0016] In some embodiments of this utility model, the paddle tip block is connected to the first mold by bolts.

[0017] In some embodiments of this utility model, a hub positioning boss is provided at the center of the contour groove.

[0018] In some embodiments of this utility model, the second mold and the first mold are connected by a threaded connector.

[0019] In some embodiments of this utility model, a lifting ring is connected to the second mold, and the lifting ring is used to connect with the lifting equipment. Attached Figure Description

[0020] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0021] Figure 1 A schematic diagram of the structure of a first mold according to an embodiment of the present invention is shown;

[0022] Figure 2 A schematic diagram of the structure of the second mold according to an embodiment of the present invention is shown;

[0023] Figure 3 A schematic diagram of the structure of the guide assembly according to an embodiment of the present invention is shown;

[0024] Figure 4 yes Figure 1 A magnified view of a portion of point A in the middle.

[0025] The labels in the attached diagram are as follows:

[0026] 100. First mold; 110. Contouring groove; 120. First connecting hole; 130. Hub positioning boss; 140. Mounting hole;

[0027] 200. Second mold; 210. Contouring protrusion; 220. Second connecting hole;

[0028] 300, guide assembly; 310, guide post; 311, insertion end; 312, first positioning part; 313, connecting end; 320, guide sleeve; 321, second positioning part; 322, socket part;

[0029] 400, Paddle tip block. Detailed Implementation

[0030] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0031] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0032] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0033] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "over," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure is flipped, an element described as "below other elements or features" or "below other elements or features" would subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations.

[0034] Figure 1A schematic diagram of the structure of the first mold 100 according to an embodiment of the present invention is shown. Figure 2 A schematic diagram of the structure of the second mold 200 according to an embodiment of the present invention is shown. Figure 1 and Figure 2 As shown, this utility model proposes an integral propeller forming mold, including a first mold 100 and a second mold 200. The first mold 100 has a contour groove 110; the second mold 200 has a contour protrusion 210. The second mold 200 and the first mold 100 are fastened together, and the contour protrusion 210 is used to insert with the contour groove 110 to form a propeller forming cavity.

[0035] The integral molding mold for the propeller in this technical solution enables the one-time integral molding of the propeller. This integral molding method ensures that each blade has completely consistent geometric features and material distribution, fundamentally eliminating assembly errors. Since each blade and hub forms a continuous integral structure, it not only improves the structural reliability of the propulsion system of equipment (UAVs, airships, and aircraft, etc.) but also significantly simplifies the subsequent dynamic balancing process. Furthermore, the integral molding structure eliminates the need for blade and hub assembly, reducing assembly workload, avoiding stress concentration at connection points, and resulting in better fatigue performance and a longer service life for the propeller. After the second mold 200 and the first mold 100 are closed, the contoured protrusion 210 is embedded in the contoured groove 110 to form the propeller molding cavity. This ensures high blade molding precision, effectively avoiding blade edge trimming and preventing glue flow during the molding process.

[0036] See Figure 1 and Figure 2 The second mold 200 and the first mold 100 are roughly disc-shaped. The propeller is formed using a carbon fiber prepreg process. For example, the process is roughly as follows: First, carbon fiber is pre-impregnated with resin to form a prepreg. This prepreg is then cut and layered to create the geometry of the propeller. Subsequently, it is cured under high temperature and pressure in a propeller integral molding mold. Finally, it undergoes machining and surface treatment. Carbon fiber possesses high strength and low weight. The prepreg process allows for precise control of fiber direction and resin content, ensuring structural uniformity and mechanical properties. Furthermore, it exhibits excellent corrosion resistance and fatigue resistance, enabling it to adapt to complex environments and extend its service life. Optionally, the propeller integral molding mold is made of steel, and the irregularly shaped metal surface is machined using a high-precision milling machine, resulting in high precision and a good formed surface.

[0037] See Figure 2 The contour protrusions 210 are designed according to the shape of the propeller blades and are used for the forming of the blades. In this technical solution, the propeller integral forming mold has 6 contour protrusions 210. In other embodiments, the number of contour protrusions 210 is set according to the number of propeller blades.

[0038] Furthermore, the propeller integral molding mold also includes a guide assembly 300, which includes a guide post 310 and a guide sleeve 320. The guide post 310 is connected to the first mold 100, and the guide sleeve 320 is connected to the second mold 200. The guide post 310 is used to insert into the guide sleeve 320.

[0039] By setting the guide assembly 300, the mold closing accuracy can be ensured, and misalignment between the second mold 200 and the first mold 100 can be prevented during the fixing process. The guide post 310 and the guide sleeve 320 have simple structures and can effectively achieve the positioning effect. Of course, the guide post 310 can also be connected to the second mold 200, and the guide sleeve 320 can be connected to the first mold 100, which can also achieve the insertion positioning effect. In some embodiments, an integrally formed protrusion can be provided on the first mold 100, and a groove can be provided at the corresponding position on the second mold 200. The positioning and assembly of the second mold 200 and the first mold 100 can be achieved by the insertion of the protrusion and the groove. In this embodiment, there are 3 sets of guide assemblies 300, which are equidistantly arranged along the circumference of the mold. In other embodiments, there can be 2 sets, 4 sets, or 5 sets of guide assemblies, etc., depending on the specific needs.

[0040] Furthermore, Figure 3 A schematic diagram of the guide assembly 300 according to an embodiment of the present invention is shown. See also Figure 3 The guide post 310 includes an insertion end 311, a first positioning part 312 and a connecting end 313 connected in sequence. The insertion end 311 is used to insert into the guide sleeve 320. The first positioning part 312 abuts against the side of the first mold 100 facing the second mold 200. The connecting end 313 is inserted into the first mold 100.

[0041] The guide post 310, with this structural form, can achieve a stable connection with the first mold 100 and the guide sleeve 320, and the structure is simple. Optionally, both the insertion end 311 and the connecting end 313 are cylindrical structures. To facilitate the insertion of the insertion end 311 into the guide sleeve 320, the top of the insertion end 311 is shaped like a frustum. The outer diameters of both the insertion end 311 and the connecting end 313 are smaller than the outer diameter of the first positioning part 312, so that the first positioning part 312 can abut against the first mold 100. Optionally, the first mold 100 is provided with a first mounting groove, and the first positioning part 312 is embedded in the first mounting groove.

[0042] Optionally, the first positioning part 312 is connected to the first mold 100 by bolts.

[0043] This method secures the guide post 310 and the first mold 100, making assembly convenient and connection reliable, thus ensuring mold closing accuracy and reducing manufacturing errors.

[0044] Furthermore, the guide sleeve 320 includes a second positioning part 321 and a sleeve part 322. The sleeve part 322 is inserted into the second mold 200 and has an insertion cavity. The second positioning part 321 abuts against the side of the second mold 200 facing the first mold 100. The second positioning part 321 has a through hole communicating with the insertion cavity, and the insertion end 311 can be inserted into the insertion cavity through the through hole.

[0045] Since the insertion end 311 has a cylindrical structure, the corresponding sleeve portion 322 is cylindrical. In some embodiments, the insertion end 311 may also be prismatic, and correspondingly, the sleeve portion 322 is configured as a prismatic structure. Optionally, a second mounting groove is provided on the second mold 200, and the second positioning portion 321 is embedded in the second mounting groove. The outer diameter of the second positioning portion 321 is larger than the outer diameter of the sleeve portion 322, thereby, the second positioning portion 321 can be connected and positioned with the second mold 200. Optionally, the second positioning portion 321 and the second mold 200 are fixedly connected by bolts.

[0046] Furthermore, Figure 4 yes Figure 1 A magnified view of a portion at point A. See also... Figure 1 and Figure 4 The inside of the contour groove 110 is provided with a propeller tip block 400, which is used for propeller tip forming.

[0047] Understandably, the shape of the propeller tip block 400 is designed according to the shape of the propeller blade tip. The design of the propeller tip block 400 is beneficial to the forming of the propeller blade and at the same time, it facilitates the demolding of the propeller. During demolding, the propeller tip block 400 and the propeller are ejected from the first mold 100 together, and then the propeller tip block 400 and the propeller blade are separated.

[0048] Furthermore, the propeller tip block 400 is connected to the first mold 100 by bolts.

[0049] Before using the propeller integral molding mold, the propeller tip block 400 and the first mold 100 are pre-fixed together with bolts. When demolding the propeller, the bolts are removed, thereby separating the propeller tip block 400 and the first mold 100. Optionally, mounting holes 140 are provided on the side of the first mold 100. When fixing the propeller tip block 400 and the first mold 100, the bolts are screwed in radially along the first mold 100 and tightened with the propeller tip block 400.

[0050] Furthermore, a hub positioning boss 130 is provided at the center of the contour groove 110.

[0051] Understandably, the hub positioning boss 130 is used for positioning and shaping the hub position of the propeller.

[0052] Furthermore, the second mold 200 and the first mold 100 are connected by a threaded connector.

[0053] Optionally, the second mold 200 is provided with a plurality of first connecting holes 120, and the first mold 100 is provided with a plurality of second connecting holes 220. The first connecting holes 120 and the second connecting holes 220 are used to insert threaded connectors. The threaded connectors ensure the forming pressure. Optionally, the threaded connectors can be bolts, nuts, etc.

[0054] Furthermore, the second mold 200 is connected to a lifting ring, which is used to connect to the lifting equipment.

[0055] By setting up lifting rings, it is easy to connect the second mold 200 with the lifting device, thereby mechanizing the mold assembly process and accelerating the production process.

[0056] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A propeller integral molding mold, characterized in that, include: A first mold (100) having a contour groove (110); The second mold (200) has a contour protrusion (210). The second mold (200) and the first mold (100) are fastened together. The contour protrusion (210) is used to insert into the contour groove (110) to form a propeller forming cavity.

2. The propeller integral forming mold according to claim 1, characterized in that, The propeller integral molding mold also includes a guide assembly (300), which includes a guide post (310) and a guide sleeve (320). The guide post (310) is connected to the first mold (100), and the guide sleeve (320) is connected to the second mold (200). The guide post (310) is used to insert into the guide sleeve (320).

3. The propeller integral forming mold according to claim 2, characterized in that, The guide post (310) includes an insertion end (311), a first positioning part (312), and a connecting end (313) connected in sequence. The insertion end (311) is used to insert into the guide sleeve (320). The first positioning part (312) and the first mold (100) abut against the side facing the second mold (200). The connecting end (313) is inserted into the first mold (100).

4. The propeller integral forming mold according to claim 3, characterized in that, The first positioning part (312) is connected to the first mold (100) by bolts.

5. The propeller integral forming mold according to claim 3, characterized in that, The guide sleeve (320) includes a second positioning part (321) and a sleeve part (322). The sleeve part (322) is inserted into the second mold (200). The sleeve part (322) has an insertion cavity. The second positioning part (321) and the second mold (200) abut against the side facing the first mold (100). The second positioning part (321) has a through hole communicating with the insertion cavity. The insertion end (311) can be inserted into the insertion cavity through the through hole.

6. The propeller integral forming mold according to claim 1, characterized in that, The interior of the contour groove (110) is provided with a propeller tip block (400), which is used for propeller tip forming.

7. The propeller integral forming mold according to claim 6, characterized in that, The paddle tip block (400) is connected to the first mold (100) by bolts.

8. The propeller integral forming mold according to claim 1, characterized in that, The center of the contour groove (110) is provided with a hub positioning boss (130).

9. The propeller integral forming mold according to claim 1, characterized in that, The second mold (200) and the first mold (100) are connected by a threaded connector.

10. The propeller integral forming mold according to claim 1, characterized in that, The second mold (200) is connected to a lifting ring, which is used to connect to a lifting device.

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