An injection molding device for processing drone propeller blades

Abstract

The present invention relates to the field of UAV blade processing, and discloses an injection molding device for UAV blade processing, including a mold member and an injection member. The injection member includes a melting tank and a thick pipe. A heating element is arranged outside the melting tank, and a blade is arranged inside the melting tank. The upper end of the blade extends out of the melting tank and is in power connection with a second electric motor. The thick pipe is horizontally arranged and located below the melting tank. A receiving nozzle is arranged at the highest point of the outer cylindrical surface of the thick pipe, and the receiving nozzle is connected to the bottom of the melting tank. A piston is sleeved inside the thick pipe, and the piston is driven by a hydraulic cylinder to move inside the thick pipe. Initially, the piston blocks the connection between the receiving nozzle and the thick pipe. An output nozzle is arranged at the output end of the thick pipe. A thin pipe is arranged on the outer cylindrical surface of the melting tank, and an electric heating wire is wound around the outer cylindrical surface of the thin pipe. The injection member further includes an injection nozzle, and the output nozzle, the thin pipe and the injection nozzle are connected through a connection assembly.

Description

Technical Field

[0001] The present invention relates to the field of unmanned aerial vehicle (UAV) processing, specifically to the field of UAV blade processing, and particularly to an injection molding device for UAV blade processing. Background Art

[0002] With the large-scale development of UAVs and the continuous exploration of application fields, in addition to flight control systems, intelligent software, etc., the materials used for UAV hardware are also constantly changing. Composite materials with better performance are the cornerstone for UAVs to achieve industrial explosion and application field expansion. Among them, UAV propellers are important components with high technical content, complex manufacturing processes, and demanding material performance requirements. Based on this, the selection of propeller materials has also become the focus of attention for UAV manufacturers.

[0003] For larger industrial UAV blades such as agricultural UAVs, to reduce the weight of the UAV body while maintaining excellent performance of the body material, conventional materials can no longer meet the requirements. Carbon fiber special nylon composite materials have gradually entered the market. Among them, high-temperature nylon commonly used in UAV blades is PA6T (polyhexamethylene terephthalamide), which has the advantages of high mechanical strength, strong rigidity, low water absorption, fast crystallization speed, and high heat distortion temperature. However, due to the melting point of high-temperature nylon reaching above 320 degrees and the crystallization molding speed being too fast, the processing difficulty of manufacturing large blades is relatively high, and local solidification and molding are likely to occur during the injection process, resulting in an impact on the quality of the processed blades.

[0004] Based on the above, the present invention proposes an injection molding device for UAV blade processing. Summary of the Invention

[0005] To solve the problems mentioned in the above background, the present invention provides an injection molding device for UAV blade processing.

[0006] To achieve the above technical objectives, the technical solutions adopted by the present invention are as follows.

[0007] An injection molding device for UAV blade processing includes a mold component and an injection component. The injection component includes a melting tank and a thick pipe. A heating element is arranged outside the melting tank, and a blade is arranged inside the melting tank. The upper end of the blade extends out of the melting tank and is in power connection with a second electric motor arranged on the outer surface of the melting tank;

[0008] The thick pipe is horizontally arranged and located below the melting tank. A receiving nozzle is arranged at the highest point of the outer circular surface of the thick pipe, and the receiving nozzle is connected to the bottom of the melting tank. A piston is sleeved inside the thick pipe, and the piston is driven by a hydraulic cylinder to move inside the thick pipe. Initially, the piston blocks the connection between the receiving nozzle and the thick pipe;

[0009] The output end of the thick pipe is provided with an output nozzle. The outer circumferential surface of the melting tank is provided with a thin pipe, and an electric heating wire is wound around the outer circumferential surface of the thin pipe. The injection member further includes an injection nozzle, and the output nozzle, the thin pipe and the injection nozzle are connected by a connection assembly.

[0010] As a further improvement and optimization of the present invention, the connection assembly is configured to switch between an injection state and a connection state. The connection assembly in the injection state is used to realize the communication between the injection nozzle and the output nozzle, and the connection assembly in the connection state is used to realize the communication between the output nozzle and the thin pipe.

[0011] As a further improvement and optimization of the present invention, the outer circumferential surface of the melting tank is provided with a feeding pipe, and the upper end of the feeding pipe is connected to a storage hopper and a solenoid valve is provided at the connection.

[0012] As a further improvement and optimization of the present invention, the blade is arranged in a spiral shape and a plurality of holes are arranged on the outer surface of the blade along the extending direction.

[0013] As a further improvement and optimization of the present invention, the connection assembly includes a connection pipe. The outer surface of the connection pipe is provided with a first side nozzle connected to the output nozzle and a second side nozzle connected to the thin pipe. The injection nozzle is arranged at the lower end of the connection pipe;

[0014] An inner conduit arranged vertically is provided in the connection pipe. The outer circumferential surface of the inner conduit is provided with an upper connection hole. The second side nozzle is connected to the upper connection hole. An inner sliding shaft is slidably arranged in the inner conduit. The inner sliding shaft is in the shape of a hollow shaft. The lower end of the inner sliding shaft extends out of the inner conduit and is provided with a conical sealing head. A lower connection hole communicating with the inner sliding shaft is provided on the conical sealing head;

[0015] A side hole is formed on the outer circumferential surface of the inner sliding shaft. During the movement of the inner sliding shaft in the inner conduit, the side hole can communicate with the upper connection hole.

[0016] As a further improvement and optimization of the present invention, the upper end of the inner cavity of the injection nozzle is arranged in a conical surface shape with a diameter increasing from bottom to top. The lower end of the inner cavity of the inner conduit is arranged in a conical surface shape with a diameter decreasing from bottom to top. The outer circumferential surface diameter of the conical sealing head first increases and then decreases from bottom to top. When the inner sliding shaft moves, the inner sliding shaft drives the conical sealing head to move together. The conical sealing head can fit with the lower end of the inner cavity of the inner conduit or the upper end of the inner cavity of the injection nozzle. The lower connection hole is arranged on the part of the outer circumferential surface of the conical sealing head where the diameter decreases from bottom to top.

[0017] As a further improvement and optimization of the present invention, when the conical sealing head fits with the upper end of the inner cavity of the injection nozzle, the conical sealing head blocks the injection nozzle and the side hole communicates with the upper connection hole. When the conical sealing head fits with the lower end of the inner cavity of the inner conduit, the lower connection hole is blocked by the lower end of the inner cavity of the inner conduit.

[0018] As a further improvement and optimization of the present invention, the linear module for driving the inner sliding shaft to move includes a lead screw arranged vertically and a third motor for driving the lead screw to rotate. The lower end of the lead screw extends into the inner conduit, and the lead screw is threadedly connected to the inner sliding shaft.

[0019] As a further improvement and optimization of the present invention, the mold member includes a rotating shaft arranged vertically and a first motor for driving the rotating shaft to rotate. A mold unit is mounted on the outer circumferential surface of the rotating shaft. A connecting arm is provided on the mold frame of the mold unit, and the end of the connecting arm is slidably connected to the rotating shaft in the vertical direction;

[0020] During the process of the mold unit rotating together with the rotating shaft, the molten plastic inlet end of the mold unit can be located directly below the injection nozzle, and a telescopic rod is provided below the injection nozzle. The telescopic rod can be used to lift the mold unit so that the injection nozzle can be inserted into the molten plastic inlet end of the mold unit.

[0021] Compared with the prior art, the present invention has the beneficial effects that:

[0022] This solution uses high-temperature nylon as the raw material to realize the injection molding processing of medium and large UAV blades. During the injection molding process:

[0023] On the one hand, the diameter of the thick pipe for injecting molten plastic is relatively large, so the injection of molten plastic into the mold unit can be completed quickly, and the injection time is short. Therefore, after the injection is completed, the molten plastic in the mold unit will gradually start to solidify and form, so as to ensure the quality of the UAV blades obtained by injection molding;

[0024] On the other hand, after each injection of molten plastic into the mold unit, the rotating shaft is driven to rotate by the first motor, so that the next mold unit is located at the injection molding position. In this way, continuous injection molding is realized. The advantage is that the interval between adjacent two injections can be reduced as much as possible, and the retention time of the molten plastic in the injection end of the injection member can be reduced, so that it can participate in the next injection molding in time;

[0025] On the one hand, after a single injection is completed, the hydraulic cylinder can drive the piston to reciprocate within the thick pipe while keeping the connection between the receiving nozzle and the thick pipe blocked. This reciprocating motion can suck the molten plastic in the thin pipe and the melting tank into the connecting pipe and the thick pipe, and then push the molten plastic back into the melting tank through the thin pipe. The advantages of this are as follows: The thin pipe is relatively thin, and winding an electric heating wire around its outside can ensure that the molten plastic in the thin pipe does not solidify and form. However, the thick pipe is relatively thick. Even if an electric heating wire is wound around the outside of the thick pipe, the molten plastic near the axis of the thick pipe is likely to solidify and form. Therefore, this solution solves this problem by means of one suction and one push. Specifically, the molten plastic in the thin pipe and the melting tank is sucked into the connecting pipe and the thick pipe, and then pushed back into the melting tank. During this process:

[0026] a. Heat exchange occurs between the sucked molten plastic and the remaining molten plastic, playing a heat preservation role; b. The action of one suction and one push can make the molten plastic receive a stirring effect, and the heat exchange effect of the molten plastic is better. Moreover, both the remaining molten plastic and the molten plastic sucked into the connecting pipe and the thick pipe have the opportunity to return to the melting tank. Therefore, it can ensure that the molten plastic in the connecting pipe and the thick pipe does not solidify and form; c. When the molten plastic returns to the melting tank, it has an initial velocity. Therefore, the molten plastic returning to the melting tank can improve the stirring effect on the molten plastic in the melting tank. And the next sucked molten plastic comes from near the wall of the melting tank, and the temperature near the wall of the melting tank is the highest. This part of the molten plastic is sucked into the connecting pipe and the thick pipe, which can effectively improve the heating and heat preservation effect. Description of the Drawings

[0027] Figure 1 Schematic diagram of an existing UAV blade;

[0028] Figure 2 Schematic diagram of the structure of the present invention;

[0029] Figure 3 Schematic diagram of the structure of the mold component;

[0030] Figure 4 Schematic diagram of the structure of the injection component;

[0031] Figure 5 Cross-sectional view of the injection component;

[0032] Figure 6 Cross-sectional view of the connection assembly in the injection state;

[0033] Figure 7 Cross-sectional view of the connection assembly in the connected state;

[0034] Figure 8 Schematic diagram of the conical sealing head.

[0035] The reference numerals in the accompanying drawings are as follows:

[0036] 100, die member; 101, rotating shaft; 102, first motor; 103, telescopic rod; 104, die unit; 200, injection member; 201, second motor; 202, feeding pipe; 203, solenoid valve; 204, storage hopper; 205, hydraulic cylinder; 206, melting tank; 207, heating element; 208, blade; 209, thick pipe; 210, piston; 211, output nozzle; 212, thin pipe; 213, injection nozzle; 214, connection assembly; 2141, connection pipe; 2142, side nozzle 1; 2143, side nozzle 2; 2144, inner conduit; 2145, inner sliding shaft; 2146, lead screw; 2147, third motor; 2148, conical sealing head; 2149, lower connection hole. Detailed implementation manners

[0037] To further elaborate on the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following, in conjunction with the accompanying drawings and preferred embodiments, details the specific implementation manners, structures, features, and effects of the present invention as follows.

[0038] Refer to Figures 2 - 8 , an injection molding device for processing drone blades, comprising a die member 100 and an injection member 200.

[0039] Die member 100: Refer to Figure 3The mold component 100 includes a vertically arranged rotating shaft 101 and a first motor 102 that drives the rotating shaft 101 to rotate. A mold unit 104 is installed on the outer cylindrical surface of the rotating shaft 101. Furthermore, the mold unit 104 matches the shape of the drone blade, which is achievable with the existing technology and is not described in detail. A connecting arm is provided on the mold frame of the mold unit 104, and a sliding connection is formed between the end of the connecting arm and the rotating shaft 101 in the vertical direction. In addition, when the mold unit 104 is located directly below the injection end of the injection component 200, the position of this mold unit 104 is named as the injection position. A telescopic rod 103 is also provided at the injection position, and the existing electric telescopic rod technology or the existing hydraulic telescopic rod technology can be used. The mold unit 104 at the injection position can be lifted up by the telescopic rod 103, so that the injection end of the injection component 200 is inserted into the molten plastic entry end of this mold unit 104. Subsequently, the injection component 200 injects the molten plastic into this mold unit 104. After the injection is completed, the telescopic rod 103 is reset, and then the rotating shaft 101 is driven to rotate by the first motor 102, so that the next mold unit 104 is located at the injection position and the above action is repeated, so that continuous injection molding is realized. The advantage is that the retention time of the molten plastic remaining in the injection end of the injection component 200 during the previous injection process can be reduced as much as possible, so that it can participate in the next injection molding in time, so that the temperature of these molten plastics can be reduced. It should be noted that high-temperature nylon is a heat-resistant polyamide, which is a kind of plastic. Therefore, this scheme refers to high-temperature nylon with plastic. In addition, in the process of rotating the rotating shaft 101 to make the next mold unit 104 located at the injection position, in order to avoid the centrifugal force that affects the injection molding due to excessive rotation speed, the rotation speed of the rotating shaft 101 should be relatively slow, so time is needed. During this period of time, it is necessary to keep the molten plastic at the injection end of the injection component 200 warm to prevent it from solidifying and molding. The specific insulation measures are elaborated in detail later.

[0040] Injection component 200: Reference Figures 4 - 8, the injection member 200 includes a melting tank 206 and a thick pipe 209. A heating element 207 is provided outside the melting tank 206. Existing electric heating technologies can be adopted and will not be elaborated here. A feeding pipe 202 is provided on the outer circumferential surface of the melting tank 206. The upper end of the feeding pipe 202 is connected to a storage hopper 204 and a solenoid valve 203 is provided at the connection. A blade 208 is provided inside the melting tank 206. The upper end of the blade 208 extends out of the melting tank 206 and is in power connection with a second motor 201. The second motor 201 is provided on the outer surface of the melting tank 206. Further, in this solution, the blade 208 is arranged in a spiral shape, similar to a feeding screw, and a number of holes are provided on the outer surface along the extending direction. The significance lies in that the spiral-shaped blade 208 not only has a stirring effect but also a material-turning effect. Therefore, the stirring effect on the plastic in the melting tank 206 is better. The holes are provided because when the spiral-shaped blade 208 rotates, it will pull the plastic to move unidirectionally. Therefore, holes need to be provided to overcome this.

[0041] Open the solenoid valve 203, and the plastic in the storage hopper 204 enters the melting tank 206 through the feeding pipe 202. After the feeding is completed, the solenoid valve 203 is closed, the heating element 207 is turned on, and the second motor 201 is turned on, so that the plastic in the melting tank 206 is heated and melted into a molten state.

[0042] The thick pipe 209 is horizontally arranged and is located below the melting tank 206. A receiving nozzle is provided at the highest point of the outer circumferential surface of the thick pipe 209. The receiving nozzle is connected to the bottom of the melting tank 206. A piston 210 is sleeved inside the thick pipe 209. The piston 210 is driven by a hydraulic cylinder 205 to move inside the thick pipe 209. Further, initially, the piston 210 blocks the connection between the receiving nozzle and the thick pipe 209. Until the plastic is melted, the piston 210 retreats, and the molten plastic falls into the thick pipe 209 through the receiving nozzle. After a preset time, when the thick pipe 209 is filled with molten plastic, the piston 210 is driven to move by the hydraulic cylinder 205, so that the molten plastic in the thick pipe 209 can be pushed out. And during the pushing process, the piston 210 keeps blocking the connection between the receiving nozzle and the thick pipe 209.

[0043] An output nozzle 211 is provided at the output end of the thick pipe 209. A thin pipe 212 is provided on the outer circumferential surface of the melting tank 206. The injection member 200 further includes an injection nozzle 213. When the mold unit 104 at the injection position moves upward, the injection nozzle 213 can insert into the molten plastic inlet end of the mold unit 104.

[0044] The outer circumferential surface of the thin tube 212 is wound with a heat preservation structure such as an electric heating wire. Since the thin tube 212 is relatively thin, the molten plastic inside the thin tube 212 can be heated and insulated, and will not solidify. However, since the thick tube 209 is relatively thick, even if the same heat preservation structure is provided, the molten plastic near the inner wall of the thick tube 209 can be effectively insulated, but the heat preservation effect of the molten plastic near the axis line of the thick tube 209 is poor and it is easy to solidify.

[0045] The output nozzle 211, the thin tube 212 and the injection nozzle 213 are connected by a connection component 214. The connection component 214 is set to switch between an injection state and a connection state. When in the injection state, the connection between the injection nozzle 213 and the output nozzle 211 can be realized through the connection component 214. The molten plastic in the thick tube 209 is pushed by the piston 210 and can be injected into the mold unit 104 through the output nozzle 211, the connection component 214 and the injection nozzle 213. When in the connection state, the connection between the output nozzle 211 and the thin tube 212 can be realized through the connection component 214. At this time, the injection has been completed. The hydraulic cylinder 205 can drive the piston 210 to reciprocate in the thick tube 209 while keeping the connection between the receiving nozzle and the thick tube 209 blocked.

[0046] Refer to Figures 6 - 8 , the connection component 214 includes a connection pipe 2141. Two side nozzles are arranged on the outer surface of the connection pipe 2141: side nozzle one 2142 and side nozzle two 2143. Among them, the injection nozzle 213 is arranged at the lower end of the connection pipe 2141. The side nozzle one 2142 is connected to the output nozzle 211, and the side nozzle two 2143 is connected to the thin tube 212.

[0047] An inner conduit 2144 arranged vertically is provided in the connection pipe 2141. An upper connection hole is arranged on the outer circumferential surface of the inner conduit 2144. The side nozzle two 2143 is connected to the upper connection hole.

[0048] An inner sliding shaft 2145 is slidably arranged in the inner conduit 2144. The inner sliding shaft 2145 is in the shape of a hollow shaft. Its lower end extends out of the inner conduit 2144 and is provided with a conical sealing head 2148. A lower connection hole 2149 communicating with the inner sliding shaft 2145 is arranged on the conical sealing head 2148. A plurality of lower connection holes 2149 are arranged in an array along the circumferential direction of the inner sliding shaft 2145.

[0049] A side hole is formed on the outer circumferential surface of the inner sliding shaft 2145. During the movement of the inner sliding shaft 2145 in the inner conduit 2144, the side hole can communicate with the upper connection hole.

[0050] The upper end of the inner cavity of the injection nozzle 213 is arranged in the shape of a conical surface with a diameter increasing from bottom to top. The lower end of the inner cavity of the inner conduit 2144 is arranged in the shape of a conical surface with a diameter decreasing from bottom to top. The outer diameter of the conical sealing head 2148 first increases and then decreases from bottom to top. When the inner sliding shaft 2145 is driven to move by the linear module, the inner sliding shaft 2145 moves together with the conical sealing head 2148. When moving upward, the conical sealing head 2148 can fit with the lower end of the inner conduit 2144. The lower connection hole 2149 is arranged on the part of the outer circumferential surface of the conical sealing head 2148 where the diameter decreases from bottom to top. Therefore, the lower connection hole 2149 will be blocked. At the same time, the side hole and the upper connection hole are not communicated. When moving downward, the conical sealing head 2148 can fit with the upper end of the injection nozzle 213 to block the injection nozzle 213. At the same time, the side hole and the upper connection hole are communicated.

[0051] Further, the linear module includes a lead screw 2146 arranged vertically and a third motor 2147 for driving the lead screw 2146 to rotate. The lower end of the lead screw 2146 extends into the inner conduit 2144. The lead screw 2146 is threadedly connected with the inner sliding shaft 2145. When the third motor 2147 drives the lead screw 2146 to rotate, the inner sliding shaft 2145 moves in the vertical direction.

[0052] The working principle of the present invention:

[0053] Step 1: Open the solenoid valve 203. The plastic in the storage hopper 204 enters the melting tank 206 through the feeding pipe 202. After the feeding is completed, the solenoid valve 203 is closed, the heating element 207 is turned on, and the second motor 201 is turned on to heat and melt the plastic in the melting tank 206 into a molten state.

[0054] The telescopic rod 103 jacks up the mold unit 104 at the injection position, so that the injection nozzle 213 is inserted into the molten plastic inlet end of the mold unit 104 at the injection position.

[0055] Step 2: The hydraulic cylinder 205 pulls the piston 210 backward to cancel the blockage of the connection between the receiving nozzle and the thick pipe 209. The molten plastic falls into the thick pipe 209 through the receiving nozzle. After a preset time, the thick pipe 209 is filled with molten plastic. The hydraulic cylinder 205 drives the piston 210 forward to push the molten plastic in the thick pipe 209 out. During the pushing process, the piston 210 maintains the blockage of the connection between the receiving nozzle and the thick pipe 209.

[0056] The connection assembly 214 is in the injection state. The pushed-out molten plastic is injected into the mold unit 104 through the output nozzle 211, the first side nozzle 2142, the connecting pipe 2141, and the injection nozzle 213. Since the diameter of the thick pipe 209 is large, therefore, as long as the power of the hydraulic cylinder 205 is large enough, the molten plastic in the thick pipe 209 can be quickly pushed into the mold unit 104.

[0057] Step Three: After the injection is completed, the connecting component 214 switches to the connected state. The hydraulic cylinder 205 can drive the piston 210 to reciprocate within the thick pipe 209 while maintaining the blockage of the connection between the receiving nozzle and the thick pipe 209. This reciprocating motion can suck the molten plastic in the thin pipe 212 and the melting tank 206 into the connecting pipe 2141 and the thick pipe 209, and then push the molten plastic back into the melting tank 206 through the thin pipe 212. The advantages of this are as follows:

[0058] The thin pipe 212 is relatively thin, and winding an electric heating wire around the outside can ensure that the molten plastic in the thin pipe 212 does not solidify. However, due to the relatively fast solidification speed of high-temperature nylon and the relatively large size of the drone propeller blades, it is necessary to quickly inject the molten plastic into the cavity of the mold unit 104. Therefore, the thick pipe 209 is relatively thick. Before the next injection, the molten plastic remaining in the thick pipe 209 and the connecting pipe 2141 is likely to solidify. This solution can solve this problem. Specifically, the molten plastic in the thin pipe 212 and the melting tank 206 is sucked into the connecting pipe 2141 and the thick pipe 209, and then pushed back into the melting tank 206. During this process, on the one hand, heat exchange will occur between the extracted part of the molten plastic and the remaining molten plastic, playing a heat preservation role. On the other hand, the pumping and pushing actions can make the molten plastic receive a stirring effect, and the heat exchange effect of the molten plastic is better. Moreover, both the remaining molten plastic and the molten plastic sucked into the connecting pipe 2141 and the thick pipe 209 have the opportunity to return to the melting tank 206. Therefore, it can be ensured that the molten plastic in the connecting pipe 2141 and the thick pipe 209 does not solidify. On the one hand, when the molten plastic returns to the melting tank 206, it has an initial velocity. Therefore, the molten plastic returning to the melting tank 206 can improve the stirring effect on the molten plastic in the melting tank 206. And the next part of the molten plastic to be extracted comes from near the wall of the melting tank 206, and the temperature near the wall of the melting tank 206 is the highest. This part of the molten plastic is sucked into the connecting pipe 2141 and the thick pipe 209, which can effectively improve the heat preservation effect. Generally speaking, this solution can effectively prevent the molten plastic from solidifying during the injection process and prevent the remaining molten plastic from solidifying;

[0059] Step Four: While Step Three is occurring, the first motor 102 drives the rotating shaft 101 to rotate, so that the next mold unit 104 is located at the injection position;

[0060] Step Five: Repeat Steps One - Four.

[0061] The above are only the preferred embodiments of the present invention and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above in the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to obtain equivalent embodiments with equivalent changes within the scope of the technical solution of the present invention. However, as long as it does not depart from the content of the technical solution of the present invention, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. An injection molding device for processing drone blades, comprising a mold component (100) and an injection component (200), characterized in that: The injection component (200) comprises a melting tank (206) and a thick tube (209); a heating element (207) is arranged outside the melting tank (206); a blade (208) is arranged inside the melting tank (206); the upper end of the blade (208) extends out of the melting tank (206) and forms a power connection with a second motor (201) arranged on the outer surface of the melting tank (206); The thick tube (209) is arranged horizontally and is located below the melting tank (206). A receiving nozzle is provided at the highest point of the outer circumferential surface of the thick tube (209), and the receiving nozzle is connected to the bottom of the melting tank (206). A piston (210) is sleeved inside the thick tube (209), and the piston (210) is driven by the hydraulic cylinder (205) to move inside the thick tube (209). Initially, the piston (210) blocks the connection between the receiving nozzle and the thick tube (209); An output nozzle (211) is provided at the output end of the thick tube (209), a thin tube (212) is provided on the outer circumference of the melting tank (206), an electric heating wire is wound around the outer circumference of the thin tube (212), the injection component (200) further comprises an injection nozzle (213), and the output nozzle (211), the thin tube (212) and the injection nozzle (213) are connected via a connection assembly (214); The connecting component (214) is configured to switch between an injection state and a connection state. The connecting component (214) in the injection state is used to achieve communication between the injection nozzle (213) and the output nozzle (211), and the connecting component (214) in the connection state is used to achieve communication between the output nozzle (211) and the capillary (212). The connecting assembly (214) comprises a connecting pipe (2141), the outer surface of the connecting pipe (2141) is provided with a side nozzle 1 (2142) connected to the output nozzle (211) and a side nozzle 2 (2143) connected to the capillary (212), and the injection nozzle (213) is arranged at the lower end of the connecting pipe (2141); An inner conduit (2144) arranged vertically is arranged in the connecting pipe (2141); an upper connecting hole is arranged on the outer circumferential surface of the inner conduit (2144); the second side nozzle (2143) is connected to the upper connecting hole; an inner sliding shaft (2145) is slidably arranged in the inner conduit (2144); the inner sliding shaft (2145) is in the shape of a hollow shaft; the lower end of the inner sliding shaft (2145) extends out of the inner conduit (2144) and is provided with a conical sealing head (2148); and a lower connecting hole (2149) communicating with the inner sliding shaft (2145) is provided on the conical sealing head (2148); A side hole is provided on the outer circumferential surface of the inner sliding shaft (2145), and during the movement of the inner sliding shaft (2145) in the inner guide tube (2144), the side hole can be connected to the upper connecting hole.

2. The injection molding device for processing drone blades according to claim 1, characterized in that: A feeding pipe (202) is provided on the outer circumferential surface of the melting tank (206); the upper end of the feeding pipe (202) is connected to a storage hopper (204), and a solenoid valve (203) is provided at the connection.

3. The injection molding device for processing drone blades according to claim 1, characterized in that: The blade (208) is arranged in a spiral shape, and a plurality of holes are arranged on the outer surface of the blade (208) along the extension direction.

4. The injection molding device for processing drone blades according to claim 1, characterized in that: The upper end of the inner cavity of the injection nozzle (213) is configured to be a conical surface shape with a diameter that increases from bottom to top, the lower end of the inner cavity of the inner guide tube (2144) is configured to be a conical surface shape with a diameter that decreases from bottom to top, and the outer diameter of the conical sealing head (2148) first increases and then decreases from bottom to top. When the inner sliding shaft (2145) moves, the inner sliding shaft (2145) moves with the conical sealing head (2148), and the conical sealing head (2148) can fit with the lower end of the inner cavity of the inner guide tube (2144) or the upper end of the inner cavity of the injection nozzle (213). The lower connecting hole (2149) is arranged on the portion of the outer diameter of the conical sealing head (2148) that decreases from bottom to top.

5. The injection molding device for processing drone blades according to claim 4, characterized in that: When the conical sealing head (2148) is in contact with the upper end of the inner cavity of the injection nozzle (213), the conical sealing head (2148) blocks the injection nozzle (213) and the side hole is connected to the upper connecting hole. When the conical sealing head (2148) is in contact with the lower end of the inner cavity of the inner conduit (2144), the lower connecting hole (2149) is blocked by the lower end of the inner cavity of the inner conduit (2144).

6. The injection molding device for processing drone blades according to claim 5, characterized in that: The linear module for driving the inner sliding shaft (2145) to move comprises a vertically arranged lead screw (2146) and a third motor (2147) for driving the lead screw (2146) to rotate. The lower end of the lead screw (2146) extends into the inner guide tube (2144), and the lead screw (2146) and the inner sliding shaft (2145) are threadedly connected.

7. The injection molding device for processing drone blades according to claim 5, characterized in that: The mold component (100) comprises a vertically arranged rotating shaft (101) and a first motor (102) for driving the rotating shaft (101) to rotate; a mold unit (104) is mounted on the outer cylindrical surface of the rotating shaft (101); a connecting arm is arranged on the mold frame of the mold unit (104); and the end of the connecting arm forms a sliding connection with the rotating shaft (101) in the vertical direction; When the mold unit (104) rotates along with the rotating shaft (101), the molten plastic entry end of the mold unit (104) can be located directly below the injection nozzle (213), and a telescopic rod (103) is provided below the injection nozzle (213), and the mold unit (104) can be lifted by the telescopic rod (103) so that the injection nozzle (213) can be inserted into the molten plastic entry end of the mold unit (104).

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