Injection / suction device for front edge part forming

Abstract

The utility model discloses a kind of injection / suction glue device for front edge part forming, comprising: setting at the R angle of front edge part prefabricated body glue line one;With glue line one connection, for the resin is injected into the area where front edge part prefabricated body is located by glue line one injection glue component;With glue line one connection, for the suction glue component of the surplus resin at the R angle of front edge part prefabricated body is collected.The utility model effectively solves the problem of rich resin at the R angle of front edge part, improves product pass rate.

Description

Technical Field

[0001] This utility model belongs to the field of composite material molding technology, specifically relating to an injection / suction device for molding leading edge parts. Background Technology

[0002] Lightweight design is widely adopted in large aircraft and spacecraft, and carbon fiber composites have demonstrated undeniable advantages in this field. Currently, carbon fiber composites account for half of the material used in the fuselage of domestically produced large aircraft. However, the manufacturing cost of carbon fiber composites using automated and autoclave molding methods is relatively high.

[0003] Compared to automated and autoclave methods that require the use of carbon fiber prepreg for application, the VARI (Vacuum-Assisted Resin Infiltration Molding) process only requires dry carbon fiber as the main material, eliminating the need for fiber impregnation and resulting in lower material costs. The VARI process utilizes a curing oven, which incurs lower costs compared to autoclaves, including the cost of the oven itself, regular maintenance, and daily operating expenses.

[0004] When molding leading-edge parts using the VARI process, the commonly used resin introduction method is single-sided introduction. This means the resin flow channels are arranged at the product edge and shelf edge, using the flow guide mesh and the fibers themselves as resin flow channels to slowly permeate all areas. Because the leading-edge part is a large U-shaped structure, due to its own structure, resin tends to accumulate at the bottom R-corner of the U-shape during resin introduction, forming resin-rich areas and reducing the product yield. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides an injection / suction device for molding leading edge parts, which effectively solves the problem of excessive resin at the R-corner of the leading edge parts and improves the product qualification rate.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: In a first aspect, a glue injection / suction device for molding leading edge parts is provided, comprising: a glue delivery pipeline first disposed at the radius (R) corner of the leading edge part preform; a glue injection assembly connected to the glue delivery pipeline first for injecting resin through the glue delivery pipeline first into the area where the leading edge part preform is located; and a glue suction assembly connected to the glue delivery pipeline first for collecting excess resin at the radius (R) corner of the leading edge part preform.

[0007] Furthermore, the glue delivery pipeline is provided with several glue guiding holes.

[0008] Furthermore, the glue injection assembly includes: a resin tank for holding resin; an air extraction pipe disposed at the end of the leading edge part preform, the air extraction pipe being connected to a vacuum pump; during glue injection, glue delivery pipe one is connected to the resin tank through glue delivery pipe two; when the vacuum pump is started, the resin contained in the resin tank is injected into the area where the leading edge part preform is located along glue delivery pipe two, glue delivery pipe one, and a guide net laid between glue delivery pipe one and the air extraction pipe.

[0009] Furthermore, a control valve three is installed on the glue delivery pipeline two.

[0010] Furthermore, the extraction pipe is provided with several air guide holes.

[0011] Furthermore, the adhesive suction assembly includes: a vacuum pump; a resin collector one, which is connected to the vacuum pump via adhesive delivery line four; and a resin collector two, which is connected to the vacuum pump via adhesive delivery line five. During adhesive suction, adhesive delivery line one is connected to resin collector one via adhesive delivery line two and to resin collector two via adhesive delivery line three. When the vacuum pump is started, excess resin at the R-corner of the leading edge part preform flows into resin collector one via adhesive delivery line one and adhesive delivery line two, and into resin collector two via adhesive delivery line one and adhesive delivery line three.

[0012] Furthermore, control valve one and control valve two are installed on the glue conveying pipeline three, control valve five is installed on the glue conveying pipeline four, and control valve four is installed on the glue conveying pipeline five.

[0013] Furthermore, all four rubber supply lines—first, second, third, fourth, and fifth—are made of polytetrafluoroethylene (PTFE).

[0014] In a second aspect, a method for forming a leading edge part based on the injection / suction device for forming a leading edge part as described in the first aspect is provided, comprising: fabricating a leading edge part preform; arranging a first glue delivery pipeline in the R-corner region of the leading edge part preform and connecting it to a glue injection assembly; the glue injection assembly injecting resin into the region where the leading edge part is located through the first glue delivery pipeline; after the glue injection is completed, connecting the first glue delivery pipeline to a suction assembly, and the suction assembly collecting excess resin at the R-corner of the leading edge part preform through the first glue delivery pipeline.

[0015] Furthermore, a set distance is maintained between the glue delivery pipeline and the leading edge component preform.

[0016] Compared with the prior art, the beneficial effects achieved by this utility model are as follows: This utility model has a glue delivery pipeline set at the R-corner of the leading edge part preform; a glue injection component connected to the glue delivery pipeline for injecting resin into the area where the leading edge part preform is located; and a glue suction component connected to the glue delivery pipeline for collecting excess resin at the R-corner of the leading edge part preform; thus effectively solving the problem of excess resin at the R-corner of the leading edge part and improving the product qualification rate. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the principle of an injection / suction device for forming leading edge parts according to an embodiment of the present invention, wherein (a) is a side view and (b) is a perspective view; Figure 2 This is a schematic diagram of a glue injection / suction device for forming leading edge parts provided by an embodiment of the present invention, which is converted from glue injection mode to glue suction mode. In this diagram, (a) is the glue injection mode and (b) is the glue suction mode. Figure 3 This is a schematic diagram of the glue delivery pipeline in an embodiment of this utility model; Figure 4 This is a schematic diagram of the installation position of the glue delivery pipeline in this embodiment of the present invention; In the diagram: 1. Leading edge component preform; 2. Vacuum pipe; 3. Resin tank; 41. Adhesive delivery pipe one; 42. Adhesive delivery pipe two; 421. Control valve three; 43. Adhesive delivery pipe three; 44. Adhesive delivery pipe four; 45. Adhesive delivery pipe five; 51. Resin collector one; 52. Resin collector two; 6. Vacuum pump; 7. Guide net; 8. Vacuum bag film. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0019] Example 1 like Figures 1-4 As shown, an injection / suction device for molding leading edge parts includes: a glue delivery pipeline 41 disposed at the R-corner of the leading edge part preform; a glue injection assembly connected to the glue delivery pipeline 41 for injecting resin into the area where the leading edge part preform 1 is located through the glue delivery pipeline 41; and a glue suction assembly connected to the glue delivery pipeline 41 for collecting excess resin at the R-corner of the leading edge part preform.

[0020] The glue injection assembly includes: a resin tank 3 for holding resin and an air extraction pipe 2 located at the end of the leading edge part preform 1, wherein the air extraction pipe 2 is connected to a vacuum pump.

[0021] During glue injection, glue delivery line 1 41 is connected to resin tank 3 through glue delivery line 2 42; when the vacuum pump is started, the resin in resin tank 3 is injected into the area where the leading edge part preform 1 is located along glue delivery line 2 42, glue delivery line 1 41, and guide net 7 laid between glue delivery line 1 41 and air extraction line 2.

[0022] The glue delivery pipeline 41 is provided with several glue guiding holes for the resin to flow from the glue delivery pipeline 41 into the area where the leading edge part preform 1 is located. The vacuum pipeline 2 is provided with several air guiding holes for evacuating the area where the leading edge part preform 1 is located, thereby providing power for the resin to flow from the glue delivery pipeline 41 into the area where the leading edge part preform 1 is located.

[0023] The adhesive suction assembly includes: a vacuum pump 6, a resin collector 1 51, and a resin collector 2 52; the resin collector 1 51 is connected to the vacuum pump 6 via a glue delivery line 44; the resin collector 2 52 is connected to the vacuum pump 6 via a glue delivery line 5 45.

[0024] During glue suction, glue delivery line 1 41 is connected to resin collector 1 51 via glue delivery line 2 42 and to resin collector 2 52 via glue delivery line 3 43. When the vacuum pump is started, excess resin at the R-corner of the leading edge part preform flows into resin collector 1 51 via glue delivery line 1 41 and glue delivery line 2 42, and into resin collector 2 52 via glue delivery line 1 41 and glue delivery line 3 43.

[0025] Control valve 3 421 is installed on glue conveying pipeline 2 42; control valve 1 431 and control valve 2 432 are installed on glue conveying pipeline 3 43; control valve 5 441 is installed on glue conveying pipeline 44; and control valve 451 is installed on glue conveying pipeline 5 45.

[0026] like Figure 1 , Figure 2 As shown, a glue delivery pipe 41 is arranged at the R-corner of the leading edge part preform, and an air extraction pipe 2 is arranged at the end edge of the leading edge part preform. The air extraction pipe 2 is connected to a vacuum device (such as a vacuum pump) at the top of the mold. When introducing resin, control valve 421 is opened, and control valves 431 and 432 are closed. The resin in the resin tank 3 is injected into the area where the leading edge part preform is located through glue delivery pipe 41 arranged at the R-corner of the leading edge part preform via glue delivery pipe 42. This allows the resin to slowly permeate the fibers of the preform from the bottom of the leading edge (i.e., at the R-corner of the leading edge part preform) and rise upwards. Figure 1 The arrows in the diagram indicate the resin flow path until the fibers of the leading edge preform are completely covered by resin, at which point the resin injection stops.

[0027] Due to its own structure, the leading edge component is most prone to resin accumulation at its bottom radius (R-corner), resulting in resin-rich R-corners that negatively impact component performance. Therefore, excess resin at the leading edge component's R-corner needs to be removed using external force. During resin injection, the resin delivery conduit 41 at the leading edge component's R-corner, which acts as the injection conduit, is reassembled with a resin collector, vacuum pump, etc., to form a resin suction device, converting the injection conduit into a suction conduit. Figure 2 As shown.

[0028] Polytetrafluoroethylene (PTFE) tubing can be used for all four types of adhesive delivery lines: 41, 42, 43, 44, and 45. However, the PTFE tubing used for adhesive delivery line 41 must have a guide hole for adhesive.

[0029] The commonly used resin introduction method in the VARI process is unilateral introduction, which has low resin introduction efficiency, long introduction time, and easily causes the resin to exceed its shelf life. This invention addresses this by arranging a resin delivery pipe 41 at the radius (R-corner) of the leading edge part, allowing the resin to rapidly diffuse and penetrate from the center outwards. This increases the resin penetration path into the fibers, effectively shortening the resin introduction time and preventing excessive resin introduction time that could lead to the resin exceeding its shelf life. Furthermore, the radius (R-corner) of the leading edge part is a resin accumulation area, which can be directly connected to a resin suction device. This converts the injection pipe into a suction pipe, extracting the resin accumulated in the radius (R-corner) area of ​​the leading edge part, solving the resin accumulation problem, preventing resin overload on the part, and allowing the resin suction device to facilitate resin aeration, effectively solving the problem of porosity on the outer surface of the part and improving the yield rate.

[0030] Example 2 Based on the injection / suction device for molding leading edge parts described in Embodiment 1, this embodiment provides a method for molding leading edge parts, including: Fabricate the leading edge part preform 1; A glue delivery pipe 41 is arranged in the R-corner area of ​​the leading edge part preform 1 and connected to the glue injection assembly. The resin injection assembly injects resin into the area where the leading edge part 9 is located through the resin delivery line 41. After the glue injection is completed, the glue delivery pipeline 41 is connected to the glue suction assembly. The glue suction assembly collects the excess resin at the R-corner of the leading edge part preform through the glue delivery pipeline 41.

[0031] In this utility model, the method for forming the leading edge part is as follows.

[0032] First, cut the fiber cloth according to the designed drawings. The leading edge part is formed by laying down a male mold onto a female mold. First, lay the material sheets on the male mold according to the required layering sequence. After laying down a certain number of layers, make a bag, seal it, vacuum it, heat and compact the layers to make them tight and prevent them from loosening. After all layers are laid down, transfer the prefabricated leading edge part 1 to the female mold and place it in its shape.

[0033] Laying auxiliary materials on the leading edge part prefabricated body 1, according to Figure 1 , Figure 4 The air extraction line 2, glue delivery line 41, guide net 7, and vacuum bag film 8 are arranged at the positions shown for bag making and sealing.

[0034] like Figure 3 As shown, glue delivery lines 1 (41), 2 (42), and 3 (43) are made of polytetrafluoroethylene (PTFE). Glue guide holes are punched at 10mm intervals on the PTFE tube (glue delivery line 41) above the part. Glue delivery lines 2 (42) and 3 (43), as well as control valves 1 (431), 2 (432), and 3 (421), are connected as shown in the diagram. Figure 4 As shown, the glue injection tube is suspended and placed at the R-corner of the leading edge part preform, so that the glue delivery tube 41 and the leading edge part preform 1 are kept at a set distance to avoid leaving tube indentations on the surface of the part.

[0035] During resin introduction, the evacuation line 2 is fully open, control valves 431 and 432 in the glue delivery line 43 are closed, and control valve 421 in the glue delivery line 42 is opened. Figure 2 As shown, connect the pipeline to resin tank 3 and wait for the resin to impregnate the fibers of the leading edge part preform. Stop the resin injection once the fibers of the leading edge part preform are completely covered by resin. Modify the injection pipeline into a suction pipeline. Connect resin delivery pipeline 1 41 to resin collector 1 51 and resin collector 2 52 via resin delivery pipeline 2 42 and resin delivery pipeline 3 43 respectively. Resin collector 1 51 and resin collector 2 52 are then connected to vacuum pump 6 via resin delivery pipeline 44 and resin delivery pipeline 5 45 respectively. Figure 2 As shown. All control valves are opened, and vacuum pump 6 is started to remove the resin accumulated at the R-corner of the leading edge part preform, thus solving the problem of resin abundance at the R-corner of the leading edge part.

[0036] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A glue injection / suction device for molding leading edge parts, characterized in that, include: A glue supply line (41) is set at the R-corner of the leading edge part preform. Connected to the first glue supply line (41), it is used to inject resin into the area where the leading edge part preform (1) is located through the first glue supply line (41); A glue-absorbing assembly connected to glue delivery line 1 (41) for collecting excess resin at the R-corner of the leading edge part preform.

2. The injection / vacuuming device for forming leading edge parts according to claim 1, characterized in that, The glue delivery pipeline (41) is provided with several glue guiding holes.

3. The injection / suction device for molding leading edge parts according to claim 1, characterized in that, The dispensing assembly includes: Resin buckets used to hold resin (3); An air extraction pipe (2) is provided at the end of the leading edge part preform (1), and the air extraction pipe (2) is connected to a vacuum pump; During the injection of resin, the first resin delivery line (41) is connected to the resin tank (3) through the second resin delivery line (42); when the vacuum pump is started, the resin in the resin tank (3) is injected into the area where the leading edge part preform (1) is located along the second resin delivery line (42), the first resin delivery line (41), and the guide net (7) laid between the first resin delivery line (41) and the air extraction line (2).

4. The injection / suction device for molding leading edge parts according to claim 3, characterized in that, The glue delivery pipeline 2 (42) is equipped with control valve 3 (421).

5. The injection / suction device for molding leading edge parts according to claim 3, characterized in that, The air extraction pipe (2) is provided with several air guide holes.

6. The injection / suction device for molding leading edge parts according to claim 3, characterized in that, The adhesive suction assembly includes: Vacuum pump (6); Resin collector 1 (51), which is connected to vacuum pump (6) via glue delivery pipeline 4 (44). Resin collector two (52), which is connected to vacuum pump (6) through glue delivery pipeline five (45); During the glue suction process, glue delivery line 1 (41) is connected to resin collector 1 (51) via glue delivery line 2 (42) and to resin collector 2 (52) via glue delivery line 3 (43). When the vacuum pump is started, excess resin at the R-corner of the leading edge part preform flows into resin collector 1 (51) via glue delivery line 1 (41) and glue delivery line 2 (42), and flows into resin collector 2 (52) via glue delivery line 1 (41) and glue delivery line 3 (43).

7. The injection / vacuuming device for molding leading edge parts according to claim 6, characterized in that, Control valve 1 (431) and control valve 2 (432) are installed on the glue conveying pipeline 3 (43), control valve 5 (441) is installed on the glue conveying pipeline 4 (45), and control valve 4 (451) is installed on the glue conveying pipeline 5 (45).

8. The injection / vacuuming device for molding leading edge parts according to claim 6, characterized in that, The first (41), second (42), third (43), fourth (44) and fifth (45) of the rubber conveying pipeline are all polytetrafluoroethylene pipes.

Images