An injection molding device and injection molding process for unmanned aerial vehicle blades

Abstract

This invention discloses an injection molding device and process for drone propellers, including a receiving seat and an injection assembly mounted on the receiving seat. This invention relates to the field of drone injection molding technology. The injection molding device and process utilize an adjustable feeding assembly for feeding the material into the cylinder. The adjustable feeding assembly has an adjustable internal space within the square cylinder, effectively preventing excessive material accumulation that could lead to material compression and difficulty in unloading, ensuring smooth material feeding into the cylinder. A hopper assembly allows for large-capacity material storage, reducing the need for frequent feeding. With the assistance of an upper inclined cylinder, the material is conveyed from the hopper assembly into the square cylinder, simultaneously driving the cylinder assembly to feed material. The differential speed design ensures full material accumulation in the square cylinder. Furthermore, with the assistance of a lower inclined cylinder, excess material is transported back to the storage hopper for storage, ensuring a stable material level in the square cylinder.

Description

Technical Field

[0001] This invention relates to the field of drone injection molding technology, specifically to an injection molding device and injection molding process for drone propellers. Background Technology

[0002] Advantages of using plastics instead of metals in drone manufacturing: Engineering plastics can be used for drone components such as fuselage, wings, protective wings, and landing gear. In addition to saving costs, they also have advantages that metals do not have: high strength, high rigidity, low coefficient of thermal expansion, strong fatigue resistance, and strong vibration resistance. Using them in drone structures can also reduce weight by 25%-30%. Among them, using carbon fiber reinforced PA modified plastics to make drone propellers can significantly improve material strength and effectively reduce the overall weight of the aircraft.

[0003] When using carbon fiber reinforced PA modified plastic to manufacture drone propellers, injection molding machines are typically used. Conventional injection molding machines include a mold clamping section and an injection section. The injection section is often set up by directly connecting the hopper to the barrel. The hopper can only store a limited amount of material, requiring frequent loading by the operator, which is quite cumbersome. Furthermore, when some material accumulates in the hopper, it can be difficult to unload the material, making it difficult to control the amount of material falling into the barrel and affecting the injection molding quality. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides an injection molding device and process for drone propellers. It solves the problems of limited raw material storage in the hopper, the need for frequent and cumbersome material loading by workers, and the difficulty in unloading material when some raw material accumulates in the hopper, which leads to difficulty in controlling the amount of raw material falling into the barrel and affecting the injection molding quality.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the present invention provides the following technical solution: an injection molding device for drone propellers, comprising a receiving seat and an injection assembly disposed on the receiving seat, the injection assembly comprising a motion assembly, a barrel assembly, a hopper assembly, and an adjustable feeding assembly, the motion assembly controlling the barrel assembly, the hopper assembly, and the adjustable feeding assembly to move left and right reciprocally, the hopper assembly storing modified PA plastic granules and conveying the stored modified PA plastic granules to the adjustable feeding assembly, the adjustable feeding assembly conveying the modified PA plastic granules to the barrel assembly, the hopper assembly driving the barrel assembly to feed material at a differential speed, and the barrel assembly hot-melting the modified PA plastic granules into injection molding compound.

[0008] The invention is further configured such that: the motion component includes a first motor and a working platform; the first motor is fixedly installed on the top of the inner cavity of the receiving seat; the output end of the first motor is fixedly connected to a threaded rod via a coupling; one end of the threaded rod is rotatably connected to the right side of the inner cavity of the receiving seat via a bearing; a driving block is sleeved and threadedly connected to the outer surface of the threaded rod; a sliding groove is provided on the top of the receiving seat; the top of the driving block passes through the sliding groove and is fixedly connected to an I-shaped plate; the top of the I-shaped plate is fixedly connected to the bottom of the working platform; limit plates are fixedly connected to the top of the receiving seat and on both the left and right sides of the sliding groove; a guide rod is fixedly connected between the two limit plates; the guide rod passes through the I-shaped plate; the I-shaped plate includes a top plate, a bottom plate, and a middle plate; the middle plate is fixedly installed on the opposite side of the top plate and the bottom plate; and the middle plate is sleeved and slidably installed on the guide rod.

[0009] By adopting the above technical solution, and utilizing the coordinated arrangement of the first motor, threaded rod, drive block, I-plate, and working platform, the left and right movement control of the working platform can be realized by controlling the forward and reverse rotation of the first motor, thus providing convenient conditions for the movement of the injection molding component toward and away from the mold closing part.

[0010] The present invention is further configured such that: the hopper assembly includes a storage hopper, the top of the storage hopper is connected through and fixedly connected to a limiting cylinder, the top of the storage hopper is fixedly connected to a second motor via a bracket, the output end of the second motor is connected through the bracket and fixedly connected to a rotating shaft via a coupling, the bottom end of the rotating shaft passes through the limiting cylinder and the storage hopper in sequence and is rotatably connected to the top of the working platform via a bearing, and a spiral feeding plate is sleeved and fixedly connected to the outer surface of the rotating shaft and located inside the limiting cylinder.

[0011] By adopting the above technical solution, a large amount of modified PA plastic granules are stored using a storage hopper, and continuous feeding of modified PA plastic granules is achieved with the cooperation of a second motor, rotating shaft, spiral feed plate and limiting cylinder.

[0012] The invention is further configured such that: the bottom of the storage hopper is fixedly installed on the top of the working platform by a support rod, and a filling hopper is connected to and fixedly installed on one side of the top of the storage hopper.

[0013] The present invention is further configured such that: the adjustable feeding assembly includes a square cylinder, the top of the right side of the square cylinder is connected to an upper inclined cylinder, one end of the upper inclined cylinder is connected to the interior of a limiting cylinder, the upper inclined cylinder is used to receive modified PA plastic granules conveyed in the limiting cylinder and guide the modified PA plastic granules into the square cylinder, and a lower inclined cylinder is connected to the right side of the square cylinder and below the upper inclined cylinder, one end of the lower inclined cylinder is connected to the interior of a storage hopper, the lower inclined cylinder is used to guide the modified PA plastic granules in the square cylinder into the storage hopper;

[0014] An adjusting plate is slidably installed inside the square tube. An adjusting screw is rotatably connected to the left side of the adjusting plate via a bearing. One end of the adjusting screw passes through the square tube and is threadedly connected to it. An auxiliary rod is fixedly connected to the left side of the adjusting plate and to both the upper and lower sides of the adjusting screw. One end of the auxiliary rod passes through the square tube.

[0015] By adopting the above technical solution, the material in the limiting cylinder is smoothly introduced into the square cylinder through the cooperation of the upper inclined cylinder and the limiting cylinder. The capacity of the square cylinder for modified PA plastic granules is adjusted by the cooperation of the adjusting plate and the adjusting screw. When the height of the modified PA plastic granules stored in the square cylinder exceeds that of the lower inclined cylinder, they flow directly back into the storage hopper through the lower inclined cylinder, thus avoiding the problem of too many modified PA plastic granules in the square cylinder affecting the feeding of the modified PA plastic granules.

[0016] The present invention is further configured such that: the material cylinder assembly includes a material cylinder, the bottom of the material cylinder is fixedly installed on the top of the working platform by a connecting block, the top of the working platform is rotatably connected to a connecting rod by a bearing, a large gear and a first bevel gear are sequentially sleeved and fixedly connected to the outer surface of the connecting rod from top to bottom, a second bevel gear is rotatably connected through the right side of the material cylinder, the first bevel gear and the second bevel gear are used in cooperation, and a small gear is sleeved and fixedly connected to the outer surface of the rotating shaft, the small gear is used in cooperation with the large gear;

[0017] An isolation plate is fixedly connected inside the material cylinder. An auger column is rotatably connected through the left side of the isolation plate. The outer surface of the auger column is adapted to the inner surface of the material cylinder. A piston plate is fixedly connected through the isolation plate at the right end of the auger column. A spline cylinder is fixedly connected to the right side of the piston plate. A spline column is fixedly connected to the left end of the second bevel gear inside the material cylinder. The spline column and the spline cylinder are used in conjunction. A hydraulic cylinder is fixedly connected to the top of the working platform. The output end of the hydraulic cylinder is connected to the inside of the material cylinder. The hydraulic cylinder is used to drive the piston plate to move back and forth.

[0018] Several heating rings are fitted around and fixedly connected to the outer periphery of the material cylinder.

[0019] The invention is further configured such that: a feed trough is provided at the top of the material cylinder and on the left side of the isolation plate; the square tube is fixedly installed at the top of the material cylinder and is located on the outer periphery of the feed trough; a cover plate adapted to the feed trough is fixedly connected to the bottom of the adjusting plate; and a movable groove adapted to the cover plate is provided on the left side of the square tube.

[0020] By adopting the above technical solution, the feeding chute on the left side of the regulating plate is blocked by the cooperation of the cover plate and the feeding chute, so as to prevent the modified PA plastic particles from overflowing into the square cylinder from the left side of the regulating plate and ensure the smooth operation of the cylinder.

[0021] This invention also discloses an injection molding process for drone propeller blades, specifically including the following steps:

[0022] Step 1, Adjustment: Rotate the adjusting screw to adjust the distance between the adjusting plate and the right side of the inner cavity of the square tube. During the movement of the adjusting plate, the cover plate will partially block the feed chute.

[0023] Step 2, feeding: The modified PA plastic granules are fed into the storage hopper through the filling hopper. The second motor is started, and the second motor drives the rotating shaft to rotate. The rotating shaft drives the spiral feeding plate to rotate, and the modified PA plastic granules stored in the storage hopper are conveyed along the limiting cylinder to the upper inclined cylinder.

[0024] Step 3, Feeding: The modified PA plastic granules in the upper inclined cylinder fall into the square cylinder, and then into the material cylinder through the feeding chute. During the rotation of the rotating shaft in Step 1, the small gear rotates, the small gear drives the large gear to rotate at a reduced speed, the large gear drives the first bevel gear to rotate synchronously, the first bevel gear drives the second bevel gear to rotate synchronously, the second bevel gear drives the spline column to rotate, the spline column drives the spline cylinder to rotate the piston plate, and the piston plate drives the auger column to rotate, conveying the modified PA plastic granules falling from the feeding chute towards the heating ring. During the conveying process, the heating ring works to heat-melt the modified PA plastic granules to obtain modified PA plastic colloid.

[0025] Step 4, Injection Molding: During injection molding, control the first motor to rotate clockwise. The first motor drives the threaded rod to rotate clockwise, and the threaded rod drives the drive block to move to the left. The drive block drives the I-plate to move to the left along the guide rod, so that the working platform moves the barrel close to and contacts the injection mold end. Start the hydraulic cylinder, and the hydraulic cylinder pushes the piston plate to move to the left, so that the hot-melted modified PA plastic colloid is injected into the injection mold end through the nozzle. After injection molding is completed, control the hydraulic cylinder to reset the piston plate, and at the same time control the first motor to rotate counterclockwise to reset the working platform.

[0026] Step 5, Returning Material: The modified PA plastic granules from Step 3 continuously fall into the square cylinder. When the height of the accumulated modified PA plastic granules in the square cylinder reaches the lower inclined cylinder, the modified PA plastic granules flow back to the storage hopper through the lower inclined cylinder.

[0027] (III) Beneficial Effects

[0028] This invention provides an injection molding device and injection molding process for drone propellers. It offers the following advantages:

[0029] (1) The present invention uses an adjustable feeding component to feed the material into the cylinder. The size of the internal space of the square cylinder of the adjustable feeding component is adjustable, which can effectively avoid excessive material accumulation, which would cause the material to be squeezed and make it difficult to discharge. This ensures smooth feeding into the cylinder. The hopper component is used to store large-capacity material without frequent feeding. With the cooperation of the upper inclined cylinder, the material is transported from the hopper component to the square cylinder, and the cylinder component is driven to feed. The differential speed design ensures that the material in the square cylinder is full. With the cooperation of the lower inclined cylinder, the excess material is transported back to the storage hopper for storage, ensuring the stability of the material level in the square cylinder.

[0030] (2) By utilizing the coordinated arrangement of a first motor, a threaded rod, a drive block, an I-plate, and a working platform, the present invention can achieve left and right movement control of the working platform by controlling the forward and reverse rotation of the first motor, thus providing convenient conditions for the movement of the injection molding component toward and away from the mold closing part.

[0031] (3) This invention utilizes a storage hopper for large-scale storage of modified PA plastic granules. With the cooperation of a second motor, a rotating shaft, a spiral feeding plate, and a limiting cylinder, continuous feeding of modified PA plastic granules is achieved. The cooperation of a small gear, a large gear, a first bevel gear, and a second bevel gear enables differential control of the feeding speed and the rotation speed of the auger column. This avoids the auger column rotating too fast, which would affect the quality of the modified PA plastic granules, while ensuring that the square cylinder can store enough modified PA plastic granules for feeding the material cylinder.

[0032] (4) This invention utilizes the cooperation of the upper inclined cylinder and the limiting cylinder to smoothly guide the material in the limiting cylinder into the square cylinder. Through the cooperation of the adjusting plate and the adjusting screw, the capacity of the square cylinder to hold modified PA plastic particles is adjusted. When the height of the modified PA plastic particles stored in the square cylinder exceeds that of the lower inclined cylinder, they flow directly back to the storage hopper through the lower inclined cylinder, thus avoiding the presence of too many modified PA plastic particles in the square cylinder, which would affect the feeding of the modified PA plastic particles.

[0033] (5) By utilizing the combination of the cover plate and the feed chute, the present invention can block the feed chute on the left side of the adjustment plate, prevent the modified PA plastic particles from overflowing from the left side of the adjustment plate into the square cylinder, and ensure the smooth operation of the cylinder. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the external structure of the present invention;

[0035] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0036] Figure 3 This is an enlarged schematic diagram of the structure at point A in Figure 2 of the present invention;

[0037] Figure 4 This is a schematic diagram showing the connection between the spline tube and spline column structure of the present invention;

[0038] Figure 5 This is a left view of the hopper assembly of the present invention;

[0039] In the diagram, 1. Receiving seat; 2. Injection assembly; 3. Motion assembly; 4. Barrel assembly; 5. Hopper assembly; 6. Adjustable feeding assembly; 7. First motor; 8. Working platform; 9. Threaded rod; 10. Drive block; 11. Slide groove; 12. I-beam plate; 13. Limiting plate; 14. Guide rod; 15. Storage hopper; 16. Limiting cylinder; 17. Second motor; 18. Rotating shaft; 19. Spiral feeding plate; 20. Injection hopper; 21. Square 21. Cylinder; 22. Upper inclined cylinder; 23. Lower inclined cylinder; 24. Adjusting plate; 25. Adjusting screw; 26. Auxiliary rod; 27. Material cylinder; 28. Connecting rod; 29. ​​Large gear; 30. First bevel gear; 31. Second bevel gear; 32. Small gear; 33. Isolation plate; 34. Screw auger column; 35. Piston plate; 36. Splined cylinder; 37. Splined column; 38. Hydraulic cylinder; 39. Heating ring; 40. Feed chute; 41. Cover plate. Detailed Implementation

[0040] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0041] Please see Figure 1-5 The present invention provides a technical solution: an injection molding device for drone propellers, as shown in the attached figure. Figure 1 As shown, it includes a receiving seat 1 and an injection assembly 2 disposed on the receiving seat 1, wherein the injection assembly 2 is composed of a motion assembly 3, a material cylinder assembly 4, a hopper assembly 5 and an adjustable feeding assembly 6.

[0042] As a preferred embodiment, the motion component 3 is used to control the left and right reciprocating movement of the material cylinder component 4, the hopper component 5, and the adjustable feeding component 6, as detailed in the attached diagram. Figure 2 As shown, the motion assembly 3 includes a first motor 7 and a working platform 8. The first motor 7 is a servo motor, electrically connected to an external power source, and controlled by a control switch. The first motor 7 is fixedly installed on the top of the inner cavity of the support 1. The output end of the first motor 7 is fixedly connected to a threaded rod 9 via a coupling. One end of the threaded rod 9 is rotatably connected to the right side of the inner cavity of the support 1 via a bearing. A drive block 10 is fitted and threadedly connected to the outer surface of the threaded rod 9. A groove 11 is provided on the top of the support 1. The top of the drive block 10 passes through the groove 11 and is fixedly connected to an I-shaped plate 12. The top of the I-shaped plate 12 is fixedly connected to the bottom of the working platform 8.

[0043] To further explain, in order to ensure the stability of the I-shaped plate 12 during the movement, the top of the receiving seat 1 and the left and right sides of the slide 11 are fixedly connected to the limit plate 13, and the guide rod 14 is fixedly connected between the two limit plates 13, and the guide rod 14 is set through the I-shaped plate 12.

[0044] As a preferred embodiment, the hopper assembly 5 is used to store modified PA plastic granules. Specifically, the hopper assembly 5 includes a storage hopper 15. The bottom of the storage hopper 15 is fixedly installed on the top of the working platform 8 by a support rod. A filling hopper 20 is connected and fixedly installed on one side of the top of the storage hopper 15. A limiting cylinder 16 is connected through and fixedly connected to the top of the storage hopper 15. A second motor 17 is fixedly connected to the top of the storage hopper 15 by a bracket. The second motor 17 is a servo motor, electrically connected to an external power source, and controlled by a control switch. The output end of the second motor 17 passes through the bracket and is fixedly connected to a rotating shaft 18 by a coupling. The bottom end of the rotating shaft 18 passes through the limiting cylinder 16 and the storage hopper 15 in sequence and is rotatably connected to the top of the working platform 8 by a bearing. A spiral feeding plate 19 is sleeved and fixedly connected to the outer surface of the rotating shaft 18 and located inside the limiting cylinder 16. The rotating shaft 18 drives the spiral feeding plate 19 to rotate, and with the cooperation of the limiting cylinder 16, the modified PA plastic granules stored in the storage hopper 15 are conveyed upward.

[0045] As a preferred embodiment, in order to convey the stored modified PA plastic granules to the adjustable feeding assembly 6, the adjustable feeding assembly 6 includes a square cylinder 21, with an upper inclined cylinder 22 connected to the top right side of the square cylinder 21. One end of the upper inclined cylinder 22 is connected to the interior of the limiting cylinder 16. The upper inclined cylinder 22 is used to receive the modified PA plastic granules conveyed in the limiting cylinder 16 and guide the modified PA plastic granules into the square cylinder 21.

[0046] As a preferred solution, in order to avoid excessive material accumulation inside the square tube 21, which would cause compression and affect material feeding, an adjusting plate 24 is slidably installed inside the square tube 21. An adjusting screw 25 is rotatably connected to the left side of the adjusting plate 24 via a bearing. One end of the adjusting screw 25 passes through the square tube 21 and is threadedly connected to the square tube 21. By using the cooperation of the adjusting plate 24 and the adjusting screw 25, the position of the adjusting plate 24 in the square tube 21 can be adjusted.

[0047] Furthermore, in order to ensure the stability of the adjusting plate 24 structure, auxiliary rods 26 are fixedly connected to the left side of the adjusting plate 24 and on both the upper and lower sides of the adjusting screw 25, with one end of the auxiliary rod 26 penetrating through the square tube 21.

[0048] As a preferred option, in order to further avoid excessive material accumulation in the square cylinder 21, a lower inclined cylinder 23 is connected to the right side of the square cylinder 21 and below the upper inclined cylinder 22. One end of the lower inclined cylinder 23 is connected to the interior of the storage hopper 15. The lower inclined cylinder 23 is used to guide the modified PA plastic granules in the square cylinder 21 into the storage hopper 15 to ensure the relative stability of the material level in the square cylinder 21.

[0049] As a preferred embodiment, to ensure normal injection molding, the barrel assembly 4 includes a barrel 27. The bottom of the barrel 27 is fixedly mounted on the top of the work platform 8 via a connecting block. The top of the work platform 8 is rotatably connected to a connecting rod 28 via a bearing. A large gear 29 and a first bevel gear 30 are sequentially fitted and fixedly connected to the outer surface of the connecting rod 28 from top to bottom. A second bevel gear 31 is rotatably connected through the right side of the barrel 27. The first bevel gear 30 and the second bevel gear 31 cooperate with each other. A small gear 32 is fitted and fixedly connected to the outer surface of the rotating shaft 18. The small gear 32 cooperates with the large gear 29. An isolation plate 33 is fixedly connected inside the barrel 27. The left side of the isolation plate 33 is rotatably connected through the shaft. A screw conveyor column 34 is connected, the outer surface of which is adapted to the inner surface of the material cylinder 27. The right end of the screw conveyor column 34 passes through the partition plate 33 and is fixedly connected to a piston plate 35. A spline cylinder 36 is fixedly connected to the right side of the piston plate 35. A spline column 37 is fixedly connected to the left end of the second bevel gear 31 and inside the material cylinder 27. The spline column 37 and the spline cylinder 36 are used in conjunction. A hydraulic cylinder 38 is fixedly connected to the top of the working platform 8. The output end of the hydraulic cylinder 38 is connected to the inside of the material cylinder 27. The hydraulic cylinder 38 is used to drive the piston plate 35 to move left and right reciprocally. Several heating rings 39 are fitted and fixedly connected to the outer periphery of the material cylinder 27. The heating rings 39 are constructed by conventional electric heating.

[0050] As explained in detail, when the rotating shaft 18 drives the pinion 32 to rotate, the pinion 32 drives the large gear 29 to rotate at a reduced speed. With the cooperation of the first bevel gear 30, the second bevel gear 31, the spline column 37, the spline cylinder 36 and the piston plate 35, the auger column 34 is driven to rotate at a reduced speed relative to the rotating shaft 18. That is, the rotating shaft 18 drives the spiral feed plate 19 to rotate faster than the auger column 34, so as to avoid the problem of the auger column 34 rotating too fast and affecting the quality of the modified PA plastic granules.

[0051] As a preferred embodiment, in order to ensure that the modified PA plastic granules in the square tube 21 are smoothly introduced into the material tube 27, a feeding groove 40 is provided at the top of the material tube 27 and on the left side of the partition plate 33. The square tube 21 is fixedly installed on the top of the material tube 27 and is located on the outer periphery of the feeding groove 40.

[0052] Furthermore, in order to accommodate the adjustment of the size of the internal storage space of the square cylinder 21 by the adjustment plate 24, a cover plate 41 adapted to the feed chute 40 is fixedly connected to the bottom of the adjustment plate 24, and an movable groove adapted to the cover plate 41 is opened on the left side of the square cylinder 21.

[0053] An injection molding process for drone propeller blades specifically includes the following steps:

[0054] Step 1, Adjustment: Rotate the adjusting screw 25 to adjust the distance between the adjusting plate 24 and the right side of the inner cavity of the square tube 21. During the movement of the adjusting plate 24, the cover plate 41 will partially block the feed chute 40.

[0055] Step 2, feeding: The modified PA plastic granules are fed into the storage hopper 15 through the filling hopper 20. The second motor 17 is started, and the second motor 17 drives the rotating shaft 18 to rotate. The rotating shaft 18 drives the spiral feeding plate 19 to rotate, and the modified PA plastic granules stored in the storage hopper 15 are conveyed to the upper inclined cylinder 22 along the limiting cylinder 16.

[0056] Step 3, Feeding: The modified PA plastic granules in the upper inclined cylinder 22 fall into the square cylinder 21, and then into the material cylinder 27 through the feeding chute 40. During the rotation of the rotating shaft 18 in Step 1, the small gear 32 is driven to rotate, which in turn drives the large gear 29 to rotate at a reduced speed. The large gear 29 drives the first bevel gear 30 to rotate synchronously, which in turn drives the second bevel gear 31 to rotate synchronously. The second bevel gear 31 drives the spline column 37 to rotate, which in turn drives the spline cylinder 36 to rotate the piston plate 35. The piston plate 35 drives the auger column 34 to rotate, conveying the modified PA plastic granules falling from the feeding chute 40 towards the heating ring 39. During the conveying process, the heating ring 39 works to heat-melt the modified PA plastic granules to obtain modified PA plastic colloid.

[0057] Step 4, Injection Molding: During injection molding, control the first motor 7 to rotate clockwise. The first motor 7 drives the threaded rod 9 to rotate clockwise. The threaded rod 9 drives the drive block 10 to move to the left. The drive block 10 drives the I-plate 12 to move to the left along the guide rod 14, so that the working platform 8 drives the material cylinder 27 to approach and contact the injection mold end. Start the hydraulic cylinder 38. The hydraulic cylinder 38 pushes the piston plate 35 to move to the left, so that the hot-melted modified PA plastic colloid is injected into the injection mold end through the nozzle. After injection molding is completed, control the hydraulic cylinder 38 to reset the piston plate 35. At the same time, control the first motor 7 to rotate counterclockwise to reset the working platform 8.

[0058] Step 5, Returning Material: The modified PA plastic granules from Step 3 continuously fall into the square cylinder 21. When the height of the accumulated modified PA plastic granules in the square cylinder 21 reaches the lower inclined cylinder 23, the modified PA plastic granules flow back to the storage hopper 15 through the lower inclined cylinder 23.

Claims

1. An injection molding device for unmanned aerial vehicle blades, comprising a receiving seat (1) and an injection assembly (2) arranged on the receiving seat (1), characterized in that: The injection assembly (2) comprises a movement assembly (3), a barrel assembly (4), a hopper assembly (5) and an adjustable feeding assembly (6), the movement assembly (3) is used for controlling the barrel assembly (4), the hopper assembly (5) and the adjustable feeding assembly (6) to move back and forth, the hopper assembly (5) is used for storing modified PA plastic particles and conveying the stored modified PA plastic particles into the adjustable feeding assembly (6), the adjustable feeding assembly (6) is used for conveying the modified PA plastic particles into the barrel assembly (4), the hopper assembly (5) is used for driving the barrel assembly (4) to eat at different speeds, and the barrel assembly (4) is used for hot melting the modified PA plastic particles into injection molding rubber; The movement assembly (3) comprises a first motor (7) and a working platform (8), the first motor (7) is fixedly installed at the top of the inner cavity of the receiving seat (1), the output end of the first motor (7) is fixedly connected with a threaded rod (9) through a shaft coupling, one end of the threaded rod (9) is rotatably connected with the right side of the inner cavity of the receiving seat (1) through a bearing, and the outer surface of the threaded rod (9) is sleeved and threadedly connected with a driving block (10); a sliding groove (11) is formed in the top of the receiving seat (1), the top of the driving block (10) penetrates through the sliding groove (11) and is fixedly connected with a work-shaped plate (12), the top of the work-shaped plate (12) is fixedly connected with the bottom of the working platform (8), and the top of the receiving seat (1) and the left and right sides of the sliding groove (11) are fixedly connected with limiting plates (13), the limiting plates (13) are fixedly connected with a guide rod (14) between the two limiting plates (13), and the guide rod (14) penetrates through the work-shaped plate (12); The hopper assembly (5) comprises a storage hopper (15), the top of the storage hopper (15) penetrates and is fixedly connected with a limiting cylinder (16), the top of the storage hopper (15) is fixedly connected with a second motor (17) through a support, the output end of the second motor (17) penetrates through the support and is fixedly connected with a rotating shaft (18) through a shaft coupling, the bottom end of the rotating shaft (18) penetrates through the limiting cylinder (16) and the storage hopper (15) in sequence and is rotatably connected with the top of the working platform (8) through a bearing, and the outer surface of the rotating shaft (18) and the inside of the limiting cylinder (16) are sleeved and fixedly connected with a spiral feeding piece (19); The adjustable feeding assembly (6) comprises a square cylinder (21), the top of the right side of the square cylinder (21) is communicated with an upper inclined cylinder (22), one end of the upper inclined cylinder (22) is communicated with the inside of the limiting cylinder (16), the upper inclined cylinder (22) is used for receiving the modified PA plastic particles conveyed in the limiting cylinder (16) and guiding the modified PA plastic particles into the square cylinder (21), the right side of the square cylinder (21) and below the upper inclined cylinder (22) are communicated with a lower inclined cylinder (23), one end of the lower inclined cylinder (23) is communicated with the inside of the storage hopper (15), and the lower inclined cylinder (23) is used for guiding the modified PA plastic particles in the square cylinder (21) into the storage hopper (15). The inside of the square cylinder (21) is slidably installed with an adjusting plate (24), the left side of the adjusting plate (24) is rotatably connected with an adjusting lead screw (25) through a bearing, one end of the adjusting lead screw (25) penetrates through the square cylinder (21) and is threadedly connected with the square cylinder (21), the left side of the adjusting plate (24) and on the upper and lower sides of the adjusting lead screw (25) are fixedly connected with auxiliary rods (26), and one end of the auxiliary rod (26) penetrates through the square cylinder (21) and is arranged. 2.The injection molding device for unmanned aerial vehicle propeller according to claim 1, wherein: The bottom of the storage hopper (15) is fixedly installed on the top of the working platform (8) through a supporting rod, and one side of the top of the storage hopper (15) is communicated and fixedly provided with a filling hopper (20). 3.The injection molding device for unmanned aerial vehicle propeller according to claim 1, wherein: The barrel assembly (4) comprises a barrel (27), the bottom of the barrel (27) is fixedly installed on the top of the working platform (8) through a connecting block, the top of the working platform (8) is rotatably connected with a butt joint rod (28) through a bearing, the outer surface of the butt joint rod (28) is sequentially sleeved and fixedly connected with a large gear (29) and a first bevel gear (30) from top to bottom, the right side of the barrel (27) penetrates and is rotatably connected with a second bevel gear (31), the first bevel gear (30) and the second bevel gear (31) are used in cooperation, the outer surface of the rotating shaft (18) is sleeved and fixedly connected with a small gear (32), and the small gear (32) is used in cooperation with the large gear (29); The inside of the barrel (27) is fixedly connected with a partition plate (33), the left side of the partition plate (33) penetrates and is rotatably connected with an auger column (34), the outer surface of the auger column (34) is matched with the inner surface of the barrel (27), the right end of the auger column (34) penetrates the partition plate (33) and is fixedly connected with a piston plate (35), the right side of the piston plate (35) is fixedly connected with a spline barrel (36), the left end of the second bevel gear (31) and in the inside of the barrel (27) is fixedly connected with a spline column (37), the spline column (37) is used in cooperation with the spline barrel (36), the top of the working platform (8) is fixedly connected with a hydraulic cylinder (38), the output end of the hydraulic cylinder (38) is communicated with the inside of the barrel (27), and the hydraulic cylinder (38) is used for driving the piston plate (35) to move back and forth. The barrel (27) is sleeved and fixedly connected with a plurality of heating rings (39).

4. The injection molding device for unmanned aerial vehicle blades of claim 3, wherein: The top of the barrel (27) and on the left side of the partition plate (33) is provided with a feeding groove (40), the square cylinder (21) is fixedly installed on the top of the barrel (27), and the square cylinder (21) is arranged on the outer periphery of the feeding groove (40), the bottom of the adjusting plate (24) is fixedly connected with a cover plate (41) matched with the feeding groove (40), and the left side of the square cylinder (21) is provided with a movable groove matched with the cover plate (41).

5. The injection molding process for unmanned aerial vehicle propeller blades, applied to the injection molding device for unmanned aerial vehicle propeller blades according to any one of claims 1-4, characterized in that: Specifically comprising the following steps: Step one, adjusting: rotating the adjusting lead screw (25), adjusting the distance between the adjusting plate (24) and the right side of the inner cavity of the square cylinder (21), and in the moving process of the adjusting plate (24), the cover plate (41) is used for partially plugging the feeding groove (40). Step two, feeding: modified PA plastic particles are added to the storage hopper (15) through the charging hopper (20), the second motor (17) is started, the second motor (17) drives the rotating shaft (18) to rotate, the rotating shaft (18) drives the spiral feeding piece (19) to rotate, and the modified PA plastic particles stored in the storage hopper (15) are conveyed to the upper inclined cylinder (22) along the limiting cylinder (16); Step three, feeding: the modified PA plastic particles in the upper inclined cylinder (22) fall into the square cylinder (21), and then fall into the barrel (27) through the feeding slot (40). During the rotation of the rotating shaft (18) in step one, the pinion (32) is driven to rotate, the pinion (32) drives the gear (29) to rotate at a low speed, the gear (29) drives the first bevel gear (30) to rotate synchronously, the first bevel gear (30) drives the second bevel gear (31) to rotate synchronously, the second bevel gear (31) drives the spline column (37) to rotate, the spline column (37) drives the spline cylinder (36) to rotate, and the piston plate (35) is driven to rotate, the piston plate (35) drives the auger column (34) to rotate, and the modified PA plastic particles falling in the feeding slot (40) are conveyed to the heating ring (39), and in the conveying process, the heating ring (39) works to heat and melt the modified PA plastic particles to obtain modified PA plastic colloid; Step four, injection molding: when injection molding is performed, the first motor (7) is controlled to rotate clockwise, the first motor (7) drives the threaded rod (9) to rotate clockwise, the threaded rod (9) drives the driving block (10) to move leftwards, the driving block (10) drives the work plate (12) to move leftwards along the guide rod (14), so that the work platform (8) drives the barrel (27) to approach and contact the injection mold end, the hydraulic cylinder (38) is started, the hydraulic cylinder (38) drives the piston plate (35) to move leftwards, so that the modified PA plastic colloid after melting is injected into the injection mold end through the nozzle, and after injection molding is completed, the piston plate (35) is reset by controlling the hydraulic cylinder (38), and the work platform (8) is reset by controlling the first motor (7) to rotate counterclockwise; Step five, back feeding: the modified PA plastic particles in step three continuously fall into the square cylinder (21), and when the height of the modified PA plastic particles accumulated in the square cylinder (21) reaches the lower inclined cylinder (23), the modified PA plastic particles flow back to the storage hopper (15) through the lower inclined cylinder (23).

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