A prepreg layup tooling for molding rotary composite materials

Abstract

This utility model discloses a prepreg layup fixture for molding rotary composite materials, including a support, a driving component, a driven component, and a rotary mold. The support includes a driving component support, a driven component support, and a connecting square tube. The connecting square tube is located between the driving component support and the driven component support, and the distance between the driving component support and the driven component support can be adjusted according to the length of the rotary mold. The driving component is installed on the top of the driving component support, and the driven component is installed on the top of the driven component support. A radiant heating platform is installed on the top of the connecting square tube. Both the driving component and the driven component have an internal vacuum structure. This utility model can suspend the rotary mold and stop it at any position. It also has a heating function, which can radiate heat the suspended mold and prepreg, and can easily install a vacuum system. Through heating and vacuum pre-compaction, the adhesion rate between prepreg layers is improved, ensuring the layup quality of the prepreg and improving the performance of the product.

Description

Technical Field

[0001] This utility model relates to the field of composite material molding technology, and in particular to a prepreg layup tooling for molding rotary composite materials. Background Technology

[0002] The quality of prepreg layup plays a crucial role in the final quality of resin-based composite molding. For rotating components such as aircraft compartments and air intakes, the molding die needs to be suspended and rotated to complete the prepreg layup. Whether manual layup or automatic equipment layup is used, multiple vacuum pre-compaction processes are required.

[0003] To better ensure layup quality, the mold needs to be uniformly preheated. During the layup process, the temperature of the operating area can be well controlled. For example, Chinese patent document CN114683576A discloses a heatable prepreg layup precompaction tooling and a layup precompaction method. The tooling platform has a heating function, which can heat the prepreg, improve the adhesion between layers, and thus improve the layup quality of the prepreg. Excess resin can be allowed to flow and then discharged through absorbent felt, thereby controlling the product thickness and improving the mechanical properties of the product.

[0004] However, the current technical solution is only applicable to shell product molding molds, and cannot be used for suspended rotating body molds, nor can it meet the characteristic that the mold needs to rotate. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a prepreg layup fixture for molding rotary composite materials. This fixture can suspend the rotary mold and stop it at any position. It also features a heating function, enabling radiant heating of the suspended mold and prepreg, and allows for easy installation of a vacuum system. Through heating and vacuum pre-compacting, the adhesion rate between prepreg layers is improved, ensuring the layup quality of the prepreg and enhancing the performance of the finished product.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A prepreg layup fixture for molding rotary composite materials includes a support, a driving component, a driven component, and a rotary mold. The support includes a driving component support, a driven component support, and a connecting square tube. The connecting square tube is located between the driving component support and the driven component support, and the distance between the driving component support and the driven component support can be adjusted according to the length of the rotary mold. The driving component is installed on the top of the driving component support, and the driven component is installed on the top of the driven component support. A radiant heating platform is installed on the top of the connecting square tube. Both the driving component and the driven component have an air extraction structure inside.

[0007] Preferably, the prime mover includes a rotating bushing and a drive assembly mounted on a prime mover bracket. The rotating bushing is connected to a rotating main shaft via a bearing a, and the rotating main shaft is driven by the drive assembly.

[0008] Preferably, the driven member includes a rotating joint bushing mounted on the driven member bracket, and the rotating joint bushing is connected to a rotating joint shaft via a bearing b.

[0009] Preferably, the drive assembly includes a geared motor mounted on the prime mover bracket, the output end of the geared motor is connected to a worm gear, the worm gear meshes with a worm wheel sleeved on the rotating main shaft, and the geared motor is controlled by a clockwise rotation button, a counterclockwise rotation button and an emergency stop switch.

[0010] Preferably, the air extraction structure includes an air extraction port a located at the inner end of the rotating main shaft, a vacuum nozzle a located at the outer end of the rotating main shaft, an air extraction port b located at the inner end of the rotating secondary shaft, and a vacuum nozzle b located at the outer end of the rotating secondary shaft. The air extraction port a and the vacuum nozzle a are connected, and the vacuum nozzle b and the air extraction port b are connected.

[0011] Preferably, the inner end of the rotating main shaft is equipped with a mold fixing flange a, and the inner end of the rotating secondary shaft is equipped with a mold fixing flange b. Both mold fixing flange a and mold fixing flange b are connected to the rotating body mold through a standard mounting plate provided on the rotating body mold.

[0012] Preferably, a sealing strip a is installed on the main rotating shaft, and a sealing strip b is installed on the secondary rotating shaft.

[0013] Preferably, the rotating mold is provided with impregnating material, a separating membrane, a breathable felt and a vacuum bag film in sequence from the inside to the outside. The vacuum bag film covers the air extraction port a and the air extraction port b inside it, and the connection between the vacuum bag film and the rotating main shaft and the rotating secondary shaft is sealed by sealing strip a and sealing strip b, respectively.

[0014] Preferably, the radiant heating platform is equipped with a temperature adjustment knob, and the vertical distance between the radiant heating platform and the rotating mold located above it is adjustable.

[0015] Compared with the prior art, the beneficial effects of this utility model are: 1. The prepreg layup tooling and laying method for rotary composite material molding of this utility model can suspend the rotary molding mold and can be adjusted to stop at any position, which greatly facilitates the layup and adjustment operation of the rotary body and prepreg, and improves the laying efficiency and laying quality. 2. The vacuum nozzle and vacuum pipeline are fixedly mounted on the tooling, which simplifies the laying of the vacuum system, eliminates the tedious vacuum degree adjustment process, and improves work efficiency. 3. The radiant heating platform can preheat the rotating mold and the prepreg, and can regulate the ambient temperature of the laying area. This avoids poor interlayer bonding due to low ambient temperature and hard prepreg, which can lead to quality defects such as bridging and bulging, and ensures the quality of the layup. 4. Because it integrates both radiation heating and vacuum pre-compaction functions, it can greatly improve the preparation efficiency and the interlayer compactness of the pre-compressed entity; 5. By adjusting the distance between the driving component support and the driven component support, standard mounting plates are used at both ends of the rotary body mold. This tooling can adapt to rotary body molds of different lengths and shapes. 6. The worm gear transmission of the prime mover has self-locking performance, can provide resistance to stop at any angle, has balanced transmission, and very low noise. Attached Figure Description

[0016] To illustrate the technical solutions in the embodiments of this utility model or the prior art more specifically and intuitively, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0017] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model; Figure 2 This is a schematic diagram of the prime mover structure according to an embodiment of the present utility model; Figure 3 This is a schematic diagram of the driven component structure according to an embodiment of the present utility model; Figure 4 This is a schematic diagram of mold installation according to an embodiment of the present utility model; Figure 5 This is a schematic diagram of the prepreg laying method according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the vacuum system laying in an embodiment of this utility model.

[0018] In the diagram: bracket 1, driving component bracket 101, driven component bracket 102, connecting square tube 103; 2. Prime mover, 201. Rotating spindle, 202. Rotating bushing, 203. Shaft, 204. Mold fixing flange, 205. Vacuum nozzle, 206. Air extraction port, 207. Sealing strip, 208. Worm gear, 209. Gear motor, 210. Worm, 211. Clockwise rotation button, 212. Counterclockwise rotation button, 213. Emergency stop switch; Follower 3, rotating secondary shaft 301, rotating secondary shaft sleeve 302, bearing 303, mold fixing flange 304, vacuum nozzle 305, air extraction port 306, sealing strip 307; 4. Radiant heating platform; 401. Temperature adjustment knob; 5. Rotary mold; 501. Standard mounting plate; 6. Prepreg; 7. Separating membrane; 8. Breathable felt; 9. Vacuum bag film. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] Reference Figure 1-6 A prepreg layup tooling for molding rotary composite materials includes a support 1, a driving component 2, a driven component 3, and a rotary mold 5. The support 1 includes a driving component support 101, a driven component support 102, and a connecting square tube 103. The connecting square tube 103 is located between the driving component support 101 and the driven component support 102, and the distance between the driving component support 101 and the driven component support 102 can be adjusted according to the length of the rotary mold 5. The driving component 2 is installed on the top of the driving component support 101, and the driven component 3 is installed on the top of the driven component support 102. A radiant heating platform 4 is installed on the top of the connecting square tube 103. Both the driving component 2 and the driven component 3 are equipped with an air extraction structure.

[0021] The distance between the driving member bracket 101 and the driven member bracket 102 can be adjusted using a lead screw drive structure.

[0022] In this embodiment, the prime mover 2 includes a rotating bushing 202 and a drive assembly mounted on the prime mover bracket 101. The rotating bushing 202 is connected to the rotating spindle 201 via a bearing a203. The rotating spindle 201 is driven by the drive assembly.

[0023] In this embodiment, the driven member 3 includes a rotating pair bushing 302 mounted on the driven member bracket 102, and the rotating pair bushing 302 is connected to the rotating pair shaft 301 through the bearing b303.

[0024] In this embodiment, the drive assembly includes a geared motor 209 mounted on the prime mover bracket 101. The output end of the geared motor 209 is connected to a worm gear 210, which meshes with a worm wheel 208 sleeved on the rotating main shaft 201. The geared motor 209 is controlled by a clockwise rotation button 211, a counterclockwise rotation button 212, and an emergency stop switch 213.

[0025] The rotary mold 5 can be controlled to rotate in both directions and stop at any angle by manually operating the buttons.

[0026] In this embodiment, the air extraction structure includes an air extraction port a206 located at the inner end of the rotating main shaft 201, a vacuum nozzle a205 located at the outer end of the rotating main shaft 201, an air extraction port b306 located at the inner end of the rotating secondary shaft 301, and a vacuum nozzle b305 located at the outer end of the rotating secondary shaft 301. The air extraction port a206 and the vacuum nozzle a205 are connected, and the vacuum nozzle b305 and the air extraction port b306 are connected.

[0027] In this embodiment, a mold fixing flange a204 is installed at the inner end of the rotating main shaft 201, and a mold fixing flange b304 is installed at the inner end of the rotating secondary shaft 301. Both the mold fixing flange a204 and the mold fixing flange b304 are connected to the rotating body mold 5 through a standard mounting plate 501 provided on the rotating body mold 5.

[0028] In this embodiment, a sealing strip a207 is installed on the rotating main shaft 201, and a sealing strip b307 is installed on the rotating secondary shaft 301. The rotating body mold 5 is laid with impregnating material 6, a separating membrane 7, a breathable felt 8, and a vacuum bag film 9 from the inside out. The vacuum bag film 9 covers the air extraction port a206 and the air extraction port b306 inside it, and the connection between the vacuum bag film 9 and the rotating main shaft 201 and the rotating secondary shaft 301 is sealed by the sealing strip a207 and the sealing strip b307, respectively.

[0029] In this embodiment, a temperature adjustment knob 401 is installed on the radiant heating platform 4, and the vertical distance between the radiant heating platform 4 and the rotating mold 5 located above it is adjustable. The rotating mold 5 is preheated, and the temperature of the operating area is adjusted by rotating the temperature adjustment knob 4. The distance adjustment can accommodate rotating molds 5 of different diameters, and the temperature can be controlled by changing the distance.

[0030] To facilitate temperature measurement, a universal rod can be installed on the driving component bracket 101, and a temperature measuring gun can be installed at the end of the universal rod to facilitate the adjustment of the temperature measuring gun position to measure the outside temperature of the ply.

[0031] The layup method for prepreg layup tooling used in the molding of composite materials of revolution includes the following steps: S1. Adjust the distance between the driving component bracket 101 and the driven component bracket 102 to match the distance between the standard mounting plates 501 at both ends of the rotary mold 5, and then lock them. Align the standard mounting plates 501 at both ends of the rotary mold 5 with the mold fixing flange 204 and the mold fixing flange 304 respectively, and lock them. Suspend the rotary mold 5 onto the tooling and perform demolding effect treatment on the surface of the rotary mold 5. S2. Turn on the radiant heating platform 4 and adjust the heating temperature to the range of 40-50℃ to preheat the rotary mold 5. Turn the rotary mold 5 over every 5 minutes. When the temperature of the rotary mold 5 reaches the operable temperature, adjust the heating temperature to the appropriate temperature for tiling. S3. Lay the prepreg 6 on the rotary mold 5 and manually compact it. When it approaches the lower surface of the rotary mold 5, press the clockwise rotation button 211 on the motor panel to adjust the suspension angle of the rotary mold 5 to a suitable position for the laying operation. Release the button and then proceed with the subsequent laying. When it is necessary to adjust the prepreg 6 layup, press the counterclockwise rotation button 212 on the motor panel to adjust the suspension angle of the rotating mold 5 in the opposite direction, so as to facilitate the layup adjustment operation. S4. Lay out to the specified number of layers, and lay out the release cloth 7, breathable felt 8, and vacuum bag film 9 in sequence on the prepreg 6 to assemble into a cylindrical vacuum system. The two ends of the vacuum bag film 9 are then sealed with the sealing strip a207 and sealing strip b307 on the rotating shaft. S5. Vacuum nozzles a205 and b305 are connected to the vacuuming device respectively. Vacuuming is performed for the first pre-compaction. After heat preservation and pressure preservation for the preset time, the vacuuming system is removed. S6. Continue to lay up the prepreg on the pre-compacted prepreg, and repeat steps S3-S5 several times to complete several pre-compactions until the prepreg layup reaches the designed number of layers, thus producing a pre-compacted entity of the designed thickness. S7. Remove the vacuum system, move the rotary mold 5 away from the layup fixture, and proceed to the next curing process.

[0032] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A prepreg layup tooling for molding rotary composite materials, comprising a support (1), a driving member (2), a driven member (3), and a rotary mold (5), characterized in that, The bracket (1) includes a driving component bracket (101), a driven component bracket (102), and a connecting square tube (103). The connecting square tube (103) is located between the driving component bracket (101) and the driven component bracket (102), and the distance between the driving component bracket (101) and the driven component bracket (102) can be adjusted according to the length of the rotary mold (5). The driving component (2) is installed on the top of the driving component bracket (101), and the driven component (3) is installed on the top of the driven component bracket (102). A radiant heating platform (4) is installed on the top of the connecting square tube (103). Both the driving component (2) and the driven component (3) are equipped with an air extraction structure.

2. The prepreg layup tooling for molding rotary composite materials according to claim 1, characterized in that, The prime mover (2) includes a rotating bushing (202) and a drive assembly mounted on a prime mover bracket (101). The rotating bushing (202) is connected to a rotating spindle (201) via a bearing a (203). The rotating spindle (201) is driven by the drive assembly.

3. The prepreg layup tooling for molding composite materials of revolution as described in claim 2, characterized in that, The driven member (3) includes a rotating secondary bushing (302) mounted on the driven member bracket (102), and the rotating secondary bushing (302) is connected to the rotating secondary shaft (301) via a bearing b (303).

4. The prepreg layup tooling for molding composite materials of revolution as described in claim 3, characterized in that, The drive assembly includes a geared motor (209) mounted on a prime mover bracket (101). The output end of the geared motor (209) is connected to a worm gear (210). The worm gear (210) meshes with a worm wheel (208) sleeved on the rotating main shaft (201). The geared motor (209) is controlled by a clockwise rotation button (211), a counterclockwise rotation button (212), and an emergency stop switch (213).

5. A prepreg layup tooling for molding composite materials of revolution as described in claim 4, characterized in that, The air extraction structure includes an air extraction port a (206) located at the inner end of the rotating main shaft (201), a vacuum nozzle a (205) located at the outer end of the rotating main shaft (201), an air extraction port b (306) located at the inner end of the rotating secondary shaft (301), and a vacuum nozzle b (305) located at the outer end of the rotating secondary shaft (301). The air extraction port a (206) and the vacuum nozzle a (205) are connected, and the vacuum nozzle b (305) and the air extraction port b (306) are connected.

6. A prepreg layup tooling for molding composite materials of revolution as described in claim 5, characterized in that, The inner end of the rotating main shaft (201) is equipped with a mold fixing flange a (204), and the inner end of the rotating secondary shaft (301) is equipped with a mold fixing flange b (304). Both the mold fixing flange a (204) and the mold fixing flange b (304) are connected to the rotating mold (5) through a standard mounting plate (501) provided on the rotating mold (5).

7. A prepreg layup tooling for molding rotary composite materials according to claim 6, characterized in that, A sealing strip a (207) is installed on the main rotating shaft (201), and a sealing strip b (307) is installed on the secondary rotating shaft (301).

8. A prepreg layup tooling for molding composite materials of revolution according to claim 7, characterized in that, The rotating mold (5) is laid with impregnating material (6), isolation film (7), breathable felt (8) and vacuum bag film (9) from the inside out. The vacuum bag film (9) covers the air extraction port a (206) and air extraction port b (306) inside it, and the connection between the vacuum bag film (9) and the rotating main shaft (201) and the rotating secondary shaft (301) is sealed by sealing strip a (207) and sealing strip b (307) respectively.

9. A prepreg layup tooling for molding rotary composite materials according to claim 8, characterized in that, The radiant heating platform (4) is equipped with a temperature adjustment knob (401), and the vertical distance between the radiant heating platform (4) and the rotating mold (5) located above it is adjustable.

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