A wind turbine fairing injection molding device

Abstract

This invention discloses a resin injection molding device for wind turbine fairings, belonging to the field of fairing processing technology. It includes an upper mold, a lower mold, a resin injection mechanism, and a vacuum mechanism. The upper mold is located above the lower mold, and a punch and a die are respectively provided on opposite sides of the upper and lower molds. The punch and die are closed by a guiding mechanism, leaving a cavity for resin injection between them. The punch contains the resin injection mechanism and the vacuum mechanism, which is connected to the cavity and maintains a vacuum state within it. The resin injection mechanism is also connected to the cavity and injects resin into the cavity under negative pressure. This invention utilizes the up-and-down movement of the movable plate of the vacuum mechanism to re-push excess extracted resin back into the cavity, reducing the amount of resin entering the vacuum port and facilitating subsequent demolding.

Description

Technical Field

[0001] This invention belongs to the field of fairing processing technology, specifically relating to a wind power generation fairing injection molding device. Background Technology

[0002] A wind turbine fairing is an outer protective cover for the wind turbine hub. Because the airflow will be evenly distributed according to the streamline shape of the fairing when the wind turbine is facing the wind, it is called a fairing. The fairing is generally vacuum-cast into shape in a fairing mold during processing.

[0003] In actual production processes, the mold cavity of the flow guide is equipped with a vacuum vent to create a vacuum state inside the mold cavity. Then, the adhesive is injected into the vacuum cavity. However, the vent must always be in a vacuum state, which may cause some adhesive to be sucked into the vent. If the adhesive at the vent solidifies, it will make subsequent demolding inconvenient and may also cause damage to the flow guide. Summary of the Invention

[0004] The purpose of this invention is to provide a wind turbine fairing injection molding device to solve the problem that the mold cavity of the fairing is equipped with a vacuum vent to keep the mold cavity in a vacuum state, and then the glue is injected into the vacuum cavity. However, the vent must always be in a vacuum state, which may cause some glue to be sucked into the vent. If the glue at the vent solidifies, it will cause difficulties in subsequent demolding and may also cause damage to the fairing.

[0005] A wind turbine fairing injection molding device includes an upper mold, a lower mold, an injection mechanism, and an extraction mechanism. The upper mold is located above the lower mold, and a punch and a die are respectively provided on opposite sides of the upper and lower molds. The punch and die are closed by a guiding mechanism, and a cavity for injection is left between the punch and die. The injection mechanism and the extraction mechanism are provided inside the punch. The extraction mechanism is connected to the cavity and uses the extraction mechanism to create a vacuum state in the cavity. The injection mechanism is also connected to the cavity and injects glue into the cavity under negative pressure.

[0006] Preferably, the suction mechanism includes a cavity, a suction port, a suction pipe, a telescopic rod, and a movable plate. The cavity is formed inside the punch and has an annular structure. Multiple suction ports are connected between the inside of the punch and the cavity. The cavity is divided into a liquid storage chamber and a suction chamber by the movable plate. The inner and outer walls of the movable plate abut against the inner wall of the cavity, and multiple telescopic rods are fixedly connected to the bottom of the movable plate. The height of the movable plate is greater than the size of the suction port. The suction pipe is connected to the bottom of the suction chamber and extends to the outside of the punch. Suction holes are formed on the surface of the movable plate, and a gas-liquid separation membrane is covered on the top of the movable plate.

[0007] Preferably, an annular pipe is provided above the upper mold, and multiple branch pipes are connected to the bottom of the annular pipe. The branch pipes extend into the upper mold and are L-shaped. The ends of the horizontal parts of the branch pipes are connected to the air extraction pipe, and a main air extraction pipe is provided on one side of the annular pipe.

[0008] Preferably, the movable plate has multiple limiting grooves on the side near the air extraction port, each limiting groove corresponding to one of the air extraction ports. A rod is slidably connected inside each limiting groove. The rod corresponds to the air extraction port and has a beveled bottom. The bottom of the air extraction port is adapted to the bottom of the rod. A pressure plate is fixedly connected to the end of the rod located in the limiting groove. A return spring is fixedly connected between the pressure plate and the end of the limiting groove.

[0009] Preferably, the telescopic rod includes a fixed rod, a movable rod, and an abutment spring. The fixed rod is fixedly connected to the bottom of the suction chamber along its circumferential direction, and the fixed rod is hollow inside. The movable rod is inserted into the fixed rod, and the abutment spring is fixedly connected between the inner bottom of the fixed rod and the outer bottom of the movable rod.

[0010] Preferably, the gas-liquid separation membrane is a PEM water electrolysis titanium fiber board gas diffusion layer proton exchange membrane titanium felt high-temperature gas-liquid separation fiber paper.

[0011] Preferably, the glue injection mechanism includes a glue injection pipe and a glue injection groove. The center of the punch has multiple glue injection grooves. The bottom of the glue injection groove is connected to the cavity, and the top of the glue injection groove is connected to the glue injection pipe. The glue injection groove and the cavity are coaxial.

[0012] Preferably, the guiding mechanism includes a hydraulic cylinder, a guide rod, and a step. The guide rod is provided at each corner of the lower mold, and guide holes that slidably connect to the guide rods are provided at each corner of the upper mold. Fixed seats are fixedly connected to both sides of the lower mold, and the hydraulic cylinder is mounted on each fixed seat. The top end of the piston rod of the hydraulic cylinder is fixedly connected to both sides of the upper mold. The top of the lower mold has a groove coaxial with the concave mold, and the lower part of the upper mold has a step adapted to the groove.

[0013] The present invention has the following advantages:

[0014] In this invention, after the punch and die are closed, the evacuation pipe is connected to the evacuation port via the cavity. As the vacuum pump continuously operates, air is continuously drawn from the cavity through the evacuation port, gradually creating a vacuum inside the cavity. This also creates a negative pressure state in the cavity, causing the movable plate to move downwards. The retraction of the telescopic rod causes the end of the insertion rod to abut against the inner wall of the cavity, and the return spring is also in a compressed, energy-storing state. When the injection pressure is reached, resin is injected into the cavity through the injection mechanism. Under the action of negative pressure, the resin is continuously injected into the cavity, and some of the resin is drawn into the cavity. Because a gas-liquid separation membrane covers the upper part of the movable plate, the gas and liquid are separated. A separation membrane separates the resin from the air, thus separating the resin within the storage chamber. After filling, under normal atmospheric pressure, the evacuation chamber is no longer evacuated, releasing the energy of the spring and causing the movable plate to move upward. During this upward movement, the resin in the storage chamber is discharged from the evacuation port into the mold cavity. When the insert rod reaches the evacuation port, it is inserted into the port by the return spring, squeezing the resin remaining there back into the mold cavity. This prevents resin accumulation at the evacuation port, thus preventing it from solidifying. The upward movement of the movable plate allows for resin backfilling, enabling metered filling and reducing resin waste. This invention utilizes the up-and-down movement of the movable plate of the evacuation mechanism to re-push excess extracted resin back into the mold cavity, reducing the amount of resin entering the evacuation port and facilitating subsequent demolding. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0017] Figure 3 This is a schematic diagram of the structure of the punch of the present invention;

[0018] Figure 4 This is a schematic diagram of the internal structure of the punch of the present invention;

[0019] Figure 5 This is a schematic diagram of the structure of the movable plate of the present invention.

[0020] in:

[0021] 10. Upper die; 11. Lower die; 12. Cavity die;

[0022] 2. Glue injection mechanism; 20. Glue injection pipe; 21. Glue injection tank;

[0023] 3. Air extraction mechanism; 30. Cavity; 31. Air extraction port; 32. Movable plate; 33. Gas-liquid separation membrane; 34. Air extraction chamber; 35. Air extraction pipe; 36. Telescopic rod; 360. Fixed rod; 361. Movable rod; 362. Contact spring; 37. Annular pipe; 38. Branch pipe; 39. Insert rod; 390. Return spring; 391. Limiting groove; 392. Pressure plate;

[0024] 4. Guide mechanism; 40. Hydraulic cylinder; 41. Guide rod; 43. Guide hole; 44. Groove; 45. Step. Detailed Implementation

[0025] The following detailed description of the embodiments, with reference to the accompanying drawings, will further illustrate the specific implementation of the present invention, in order to help those skilled in the art to have a more complete, accurate, and in-depth understanding of the inventive concept and technical solution of the present invention.

[0026] like Figure 1-5 The wind turbine fairing injection molding device shown includes an upper mold 1, a lower mold 10, an injection mechanism 2, and an extraction mechanism 3. The upper mold 1 is located above the lower mold 10, and a punch 12 and a die 11 are respectively provided on opposite sides of the upper mold 1 and the lower mold 10. The die 11 and the punch 12 are closed by means of a guide mechanism 4, and a cavity for injection is left between the punch 12 and the die 11. The injection mechanism 2 and the extraction mechanism 3 are provided inside the punch 12. The extraction mechanism 3 is connected to the cavity and uses the extraction mechanism 3 to make the cavity a vacuum state. The injection mechanism 2 is also connected to the cavity and injects glue into the cavity under negative pressure.

[0027] The suction mechanism 3 includes a cavity 30, a suction port 31, a suction pipe 35, a telescopic rod 36, and a movable plate 32. The cavity 30 is formed inside the punch 12 and has an annular structure. Multiple suction ports 31 are connected between the inside of the punch 12 and the cavity 30. The cavity 30 is divided into a liquid storage chamber and a suction chamber 34 by means of the movable plate 32. The inner and outer walls of the movable plate 32 abut against the inner wall of the cavity 30, and multiple telescopic rods 36 are fixedly connected to the bottom of the movable plate 32. The height of the movable plate 32 is greater than the size of the suction port 31. The bottom of the suction chamber 34 is connected to the suction pipe 35, and the suction pipe 35 extends to the outside of the punch 12. The surface of the movable plate 32 has suction holes, and the top of the movable plate 32 is covered with a gas-liquid separation membrane 33. The movable plate 32 has multiple limiting grooves 391 on the side near the air extraction port 31. Each limiting groove 391 corresponds to one of the air extraction ports 31. A rod 39 is slidably connected inside the limiting groove 391. The rod 39 corresponds to the air extraction port 31 and the bottom of the rod 39 has an inclined structure. The bottom of the air extraction port 31 is adapted to the bottom of the rod. A pressure plate 392 is fixedly connected to the end of the rod 39 located in the limiting groove 391. A return spring 390 is fixedly connected between the pressure plate 392 and the end of the limiting groove 391. The telescopic rod 36 includes a fixed rod 360, a movable rod 361, and an abutment spring 362. The bottom of the suction chamber 34 is fixedly connected to the fixed rod 360 along its circumferential direction, and the fixed rod 360 is hollow inside. The movable rod 361 is inserted into the fixed rod 360, and the abutment spring 362 is fixedly connected between the inner bottom of the fixed rod 360 and the outer bottom of the movable rod 361.

[0028] After the punch 12 and die 11 are closed, the evacuation pipe 35 is connected to the outside of the punch 12, which can be connected to a vacuum pump. The evacuation pipe 35 is connected to the evacuation port 31 through the cavity 30. As the vacuum pump works continuously, air is continuously drawn from the cavity through the evacuation port 31, gradually bringing the cavity into a vacuum state. This also puts the cavity 30 into a negative pressure state. Thus, the interior of the cavity 30 is divided into a liquid storage chamber and an evacuation chamber 34 by a movable plate. The internal air is first evacuated, causing the movable plate 32 to move downwards, reducing the volume of the evacuation chamber 34 and increasing the volume of the liquid storage chamber. Simultaneously, the movable rod 361 retracts into the fixed rod 360, and the contact spring 362 is in a compressed, energy-storing state. The downward movement of the movable plate 32 also causes the end of the insertion rod 39 to contact the inner wall of the cavity 30, and the return spring 390 is also in a compressed, energy-storing state. When the injection pressure is reached, resin is injected into the cavity through the injection mechanism 2 under negative pressure. The adhesive is continuously poured into the cavity, and some of it is drawn into the cavity 30. Because the movable plate 32 is covered by a gas-liquid separation membrane 33, which separates the adhesive from the air, the adhesive is thus separated into the storage cavity. After the filling is complete, the vacuum pump stops working, and the evacuation pipe 35 stops evacuating air. Under normal atmospheric pressure, the evacuation chamber 34 is no longer evacuated, thus releasing the energy of the spring 362 and causing the movable plate 32 to move upwards. During the upward movement of the movable plate 32... The resin liquid inside the storage chamber is discharged from the air extraction port 31 into the mold cavity. When the insertion rod 39 moves to the air extraction port 31, the insertion rod 39 is inserted into the air extraction port 31 under the action of the return spring 390, thereby squeezing the resin liquid remaining inside the air extraction port 31 back into the mold cavity. This can prevent the resin liquid from accumulating at the air extraction port 31, so that the resin liquid will not solidify at the air extraction port 31. By moving the movable plate 32 upward, the resin liquid can be backfilled, so that the resin liquid can be dispensed in a metered manner, reducing the waste of resin liquid.

[0029] An annular pipe 37 is provided above the upper mold 1. Multiple branch pipes 38 are connected to the bottom of the annular pipe 37. The branch pipes 38 extend into the punch 12 and are L-shaped. The end of the horizontal part of the branch pipe 38 is connected to the air extraction pipe 35. A main air extraction pipe is provided on one side of the annular pipe 37.

[0030] The bottom of the annular pipe 37 is connected to multiple branch pipes 38. The bottom of the branch pipes 38 extends into the punch 12 and is connected to the air extraction pipe 35. This allows for uniform air extraction, balances the pressure inside the cavity 30, and makes subsequent glue extraction more uniform.

[0031] The gas-liquid separation membrane 33 is the PEM water electrolysis titanium fiber board gas diffusion layer proton exchange membrane titanium felt high-temperature gas-liquid separation fiber paper. As a type of gas-liquid separation membrane, the PEM water electrolysis titanium fiber board gas diffusion layer proton exchange membrane titanium felt high-temperature gas-liquid separation fiber paper can separate gas and liquid, and the more viscous the adhesive, the better the separation effect.

[0032] The glue injection mechanism 2 includes a glue injection pipe 20 and a glue injection groove 21. The center of the punch 12 has a plurality of glue injection grooves 21. The bottom of the glue injection groove 21 is connected to the cavity, and the top of the glue injection groove 21 is connected to the glue injection pipe 20. The glue injection groove 21 and the cavity 30 are coaxial.

[0033] The injection pipe 20 can be a flexible pipe. The injection pipe 20 is connected to the injection cylinder and can transport resin into the injection tank 21. Under the action of negative pressure, the resin in the injection tank 21 is injected into the molding compound, thereby completing the injection function.

[0034] The guiding mechanism 4 includes a hydraulic cylinder 40, a guide rod 41, and a step 45. The guide rod 41 is provided at the corners of the lower mold 10, and the guide hole slidably connected to the guide rod 41 is provided at the corners of the upper mold 1. The lower mold 10 is fixedly connected to the two sides of the fixed seat, and the hydraulic cylinder 40 is provided on the fixed seat. The top end of the piston rod of the hydraulic cylinder 40 is fixedly connected to the two sides of the upper mold 1. The top of the lower mold 10 is provided with a groove 44 that is coaxial with the concave mold 11, and the lower part of the upper mold 1 is provided with a step 45 that matches the groove 44.

[0035] Hydraulic cylinders 40 are located on both sides of the lower mold 10. The hydraulic cylinders 40 can be used to drive the punch 12 to move up and down, thereby closing or separating the mold. When closing the mold, the hydraulic cylinders 40 descend, allowing the punch 12 to enter the cavity mold 11, and then vacuum potting is performed. The guide rod 41 is used to limit the movement of the upper mold 1, so that it moves in the same straight line. The step 45 and the groove 44 are matched to make the punch 12 and the cavity mold 11 more tightly fitted, avoiding excessive gaps.

[0036] Working principle: After the punch 12 and die 11 are closed, the evacuation pipe 35 is connected to the outside of the punch 12, which can be connected to a vacuum pump. The evacuation pipe 35 is connected to the evacuation port 31 through the cavity 30. As the vacuum pump works continuously, air is continuously drawn from the cavity through the evacuation port 31, gradually bringing the cavity into a vacuum state. This also puts the cavity 30 into a negative pressure state. Thus, the interior of the cavity 30 is divided into a liquid storage chamber and an evacuation chamber 34 by a movable plate. The air inside the air chamber 34 is first evacuated, causing the movable plate 32 to move downwards, reducing the volume of the air evacuation chamber 34 and increasing the volume of the liquid storage chamber. Simultaneously, the movable rod 361 retracts into the fixed rod 360, and the contact spring 362 is in a compressed, energy-storing state. The downward movement of the movable plate 32 also causes the end of the insertion rod 39 to contact the inner wall of the cavity 30, and the return spring 390 is also in a compressed, energy-storing state. When the injection pressure is reached, resin is injected into the cavity through the injection mechanism 2 under negative pressure. Under the action of the action, the adhesive is continuously poured into the cavity. A portion of the adhesive is drawn into the cavity 30. Since the gas-liquid separation membrane 33 covers the upper part of the movable plate 32, it separates the adhesive from the air. Thus, the adhesive is separated in the storage cavity. After the filling is completed, the vacuum pump stops working, the evacuation pipe 35 stops evacuating air, and under normal atmospheric pressure, the evacuation chamber 34 is no longer evacuated. This causes the spring 362 to release energy, driving the movable plate 32 to move upward. The process of the movable plate 32 moving upward... The resin liquid inside the liquid storage chamber is discharged from the air extraction port 31 into the mold cavity. When the insertion rod 39 moves to the air extraction port 31, the insertion rod 39 is inserted into the air extraction port 31 under the action of the return spring 390, thereby squeezing the resin liquid remaining in the air extraction port 31 back into the mold cavity. This can prevent the resin liquid from accumulating at the air extraction port 31, so that the resin liquid will not solidify at the air extraction port 31. By moving the movable plate 32 upward, the resin liquid can be backfilled, so that the resin liquid can be dispensed in a metered manner, reducing the waste of resin liquid.

[0037] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, are all within the protection scope of the present invention.

Claims

1. A wind power guide cone glue injection forming device, characterized in that: The system includes an upper mold (1), a lower mold (10), a glue injection mechanism (2), and a vacuum mechanism (3). The upper mold (1) is located above the lower mold (10), and a punch (12) and a die (11) are respectively provided on the opposite side of the upper mold (1) and the lower mold (10). The die (11) and the punch (12) are closed by means of a guide mechanism (4), and a cavity for glue injection is left between the punch (12) and the die (11). The glue injection mechanism (2) and the vacuum mechanism (3) are provided inside the punch (12). The vacuum mechanism (3) is connected to the cavity and the cavity is made to be in a vacuum state by means of the vacuum mechanism (3). The glue injection mechanism (2) is also connected to the cavity. The glue injection mechanism (2) injects glue into the cavity when the cavity is in a negative pressure state. The suction mechanism (3) includes a cavity (30), suction ports (31), suction pipes (35), telescopic rods (36), and a movable plate (32). The cavity (30) is formed inside the punch (12) and is annular. Multiple suction ports (31) are connected between the inside of the punch (12) and the cavity (30). The cavity (30) is divided into a liquid storage chamber and a suction chamber (34) by means of the movable plate (32). The wall and outer wall respectively abut against the inner wall of the cavity (30), and a plurality of telescopic rods (36) are fixedly connected to the lower part of the movable plate (32). The height of the movable plate (32) is higher than the size of the air extraction port (31). The bottom of the air extraction chamber (34) is connected to the air extraction pipe (35), and the air extraction pipe (35) extends to the outside of the punch (12). The surface of the movable plate (32) has air suction holes, and the top of the movable plate (32) is covered with a gas-liquid separation membrane (33). An annular pipe (37) is provided above the upper mold (1). The bottom of the annular pipe (37) is connected to multiple branch pipes (38). The branch pipes (38) extend into the punch (12) and the branch pipes (38) are L-shaped. The end of the horizontal part of the branch pipe (38) is connected to the air extraction pipe (35). A main air extraction pipe is provided on one side of the annular pipe (37). The movable plate (32) has multiple limiting grooves (391) on the side near the air extraction port (31). Each limiting groove (391) corresponds to one of the air extraction ports (31). A rod (39) is slidably connected inside the limiting groove (391). The rod (39) corresponds to the air extraction port (31) and the bottom of the rod (39) is inclined. The bottom of the air extraction port (31) is adapted to the bottom of the rod (39). A pressure plate (392) is fixedly connected to the end of the rod (39) located in the limiting groove (391). A return spring (390) is fixedly connected between the pressure plate (392) and the end of the limiting groove (391). After the injection is completed, the evacuation pipe (35) stops evacuating air, the evacuation chamber (34) stops being evacuated, the movable plate (32) moves upward, and during the upward movement of the movable plate (32), the glue inside the liquid storage chamber is discharged from the evacuation port (31) to the mold cavity. When the insertion rod (39) moves to the evacuation port (31), the insertion rod (39) is inserted into the evacuation port (31) under the drive of the return spring (390), thereby squeezing the glue that remains inside the evacuation port (31) back into the mold cavity.

2. The device according to claim 1, characterized in that: The telescopic rod (36) includes a fixed rod (360), a movable rod (361), and an abutment spring (362). The bottom of the air extraction chamber (34) is fixedly connected to the fixed rod (360) along its circumferential direction, and the fixed rod (360) is hollow inside. The movable rod (361) is inserted into the fixed rod (360), and the abutment spring (362) is fixedly connected between the inner bottom of the fixed rod (360) and the outer bottom of the movable rod (361).

3. The wind power guide cone glue injection forming device according to claim 2, characterized in that: The gas-liquid separation membrane (33) is a PEM water electrolysis titanium fiber board gas diffusion layer proton exchange membrane titanium felt high-temperature gas-liquid separation fiber paper.

4. The device according to claim 1, characterized in that: The glue injection mechanism (2) includes a glue injection pipe (20) and a glue injection groove (21). The center of the punch (12) has a plurality of glue injection grooves (21). The bottom of the glue injection groove (21) is connected to the cavity, and the top of the glue injection groove (21) is connected to the glue injection pipe (20). The glue injection groove (21) and the cavity (30) are coaxial.

5. The wind turbine fairing injection molding device according to claim 1, characterized in that: The guiding mechanism (4) includes a hydraulic cylinder (40), a guide rod (41), and a step (45). The guide rod (41) is provided at the corner of the lower mold (10), and the guide hole that is slidably connected to the guide rod (41) is provided at the corner of the upper mold (1). The lower mold (10) is fixedly connected to the two sides of the fixed seat, and the hydraulic cylinder (40) is provided on the fixed seat. The top of the piston rod of the hydraulic cylinder (40) is fixedly connected to the two sides of the upper mold (1). The top of the lower mold (10) is provided with a groove (44) that is coaxial with the concave mold (11). The step (45) that is adapted to the groove (44) is provided below the upper mold (1).

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