Infrared heating curved surface thermal diaphragm forming equipment and forming method thereof

Abstract

The invention discloses infrared heating curved surface thermal diaphragm forming equipment and a forming method thereof.The infrared heating curved surface thermal diaphragm forming equipment comprises a first vacuum platform, a first heating mechanism and a first diaphragm pressing mechanism, and the vacuum platform comprises a first supporting frame, a first vacuumizing frame, a first vacuumizing panel and a first sucking pump; the first vacuumizing frame is arranged at the upper end of the first supporting frame, the first vacuumizing panel is arranged at the upper end of the first vacuumizing frame, the first air extracting pump is arranged below the first supporting frame, and a first air extracting nozzle is arranged at the lower end of the first vacuumizing frame and connected with the first air extracting pump. According to the infrared heating curved surface thermal diaphragm forming equipment and the forming method thereof, the first heating block is controlled to be independently switched on and switched off, the first heating block can directly penetrate through the first diaphragm to directly act on the carbon fiber prepreg in an infrared heating mode, energy consumption can be reduced by 30%-40%, and the forming efficiency is improved. And small-batch and low-cost production of small and medium-sized carbon fiber molded products is realized.

Description

Technical Field

[0001] This invention belongs to the field of thermal insulation film forming technology, specifically relating to an infrared heating curved surface thermal insulation film forming equipment and its forming method. Background Technology

[0002] Thermal diaphragm molding is a composite material molding method that involves laminating pre-impregnated composite materials and placing them on a mold. A specially designed diaphragm, along with vacuuming and heating, presses the laminate into the mold to form the desired shape. However, traditional autoclave processes suffer from energy consumption bottlenecks and significant energy waste. For example, in the heating process, because thermal diaphragm molding requires heating to around 80 degrees Celsius, the entire component is often heated to 80 degrees Celsius, resulting in substantial energy loss even in areas not covered by the molding mold. Therefore, for small-batch production of small to medium-sized carbon fiber molded products, the cost is relatively high. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides an infrared heating curved surface thermal insulation film forming device and its forming method.

[0004] To achieve the above objectives, the present invention provides the following technical solution: An infrared heating curved thermal insulation film forming device includes a first vacuum platform, a first heating mechanism, and a first diaphragm pressing mechanism. The vacuum platform includes a first support frame, a first vacuum frame, a first vacuum panel, and a first air pump. The first vacuum frame is disposed at the upper end of the first support frame, the first vacuum panel is disposed at the upper end of the first vacuum frame, the first air pump is disposed below the first support frame, and a first air extraction nozzle is provided at the lower end of the first vacuum frame. The first air extraction nozzle is connected to the first air pump. The first heating mechanism is located at the front end of the first vacuum platform. The first heating mechanism includes a second support frame, a first heating frame and a plurality of first heating blocks. The first heating frame is located at the upper end of the second support frame and the first heating blocks are located at the lower end of the first heating frame. The first heating blocks are arranged in a matrix and are infrared heaters. The first diaphragm pressing mechanism is disposed at the front end of the first vacuum frame. The first diaphragm pressing mechanism includes a first diaphragm frame and a first diaphragm. The first diaphragm frame is hinged to the front end of the first vacuum frame, and the first diaphragm is disposed at the upper end of the first diaphragm frame. The first diaphragm frame matches the first vacuum frame.

[0005] Furthermore, the first vacuum frame includes a first air duct platform and a first cover plate. The upper end of the first air duct platform is provided with a plurality of first air duct grooves, which are arranged vertically in a grid pattern. The first suction nozzle is connected to the first air duct grooves. The first cover plate is disposed at the upper end of the first air duct platform and is provided with a plurality of first through holes, which correspond to the upper part of the first air duct grooves and are arranged in a matrix. The first vacuum panel is provided with a plurality of first suction holes, and the first through holes correspond one-to-one with the first suction holes.

[0006] Furthermore, the upper end of the first diaphragm frame is provided with a first profile, a first connecting buckle and a first sealing strip. The outer side of the first profile is provided with a first slot. The first sealing strip matches the first slot. The two ends of the first profile are provided with first connecting holes. The first connecting buckle is provided with second connecting holes on adjacent sides. The second connecting holes match the first connecting holes. The first connecting buckle is provided with second through holes on other adjacent ends. The second through holes correspond to the second connecting holes.

[0007] Furthermore, the first diaphragm frame is hinged at both ends with a first connecting rod, the rear end of the first connecting rod is provided with a plurality of first slots, and the first vacuum frame is provided at both ends with first locking posts, the first slots matching the first locking posts.

[0008] Furthermore, the first vacuum frame is provided with a plurality of first clamps, the first diaphragm frame is provided with a plurality of first buckles, the first clamps and the first buckles correspond one to one, the upper end of the first vacuum frame is provided with a first sealing groove, and the first sealing groove is provided with a first sealing ring.

[0009] Furthermore, the first heating mechanism includes a first temperature measuring component, which includes a first temperature monitoring instrument and a first thermocouple. The first temperature monitoring instrument is disposed at the lower end of the first vacuum frame. The lower end of the first vacuum frame is provided with a plurality of first mounting ports. The first thermocouple is disposed in the first mounting port and is connected to the first temperature monitoring instrument.

[0010] A method for forming an infrared-heated curved thermal insulation film includes the following steps: Step S1: Assemble the molding equipment, fix the first cover plate to the upper end of the first vacuum frame, place the first sealing ring in the first sealing groove, place the first diaphragm on the upper end of the first diaphragm frame, use the first sealing strip to clamp the first diaphragm around the perimeter in the first slot, fix the first thermocouple in the first mounting port, and connect it to the first temperature monitoring instrument. Step S2: Molding mold installation. Place the molding mold on the upper end of the first vacuum panel, then place the carbon fiber prepreg on the upper end of the molding mold, flip the first diaphragm frame to the upper end of the first vacuum frame, and use the first clamp to hook the first clip to fix the first diaphragm frame and the first vacuum frame. Step S3: Carbon fiber forming. Move the second support frame to move the first heating frame directly above the first diaphragm frame. Turn on the first heating block to heat and soften the carbon fiber prepreg. The first thermocouple and the first temperature monitoring instrument detect the temperature. The first vacuum pump draws a vacuum to tighten the first diaphragm, so that the carbon fiber prepreg is tightly attached to the forming mold, thereby realizing the curved surface forming of the carbon fiber prepreg.

[0011] The present invention discloses an infrared heating curved thermal insulation film forming equipment and its forming method. Compared with the prior art, its advantages are that it controls the individual switching of the first heating block in the corresponding area by local temperature measurement and feedback of the first thermocouple, and directly acts on the carbon fiber prepreg by infrared heating through the first diaphragm, increasing the heating rate by more than 50%. Furthermore, by combining multiple infrared bands, it achieves synchronous curing of the forming mold and the carbon fiber prepreg, which can reduce energy consumption by 30-40% and realize small-batch, low-cost production of small and medium-sized carbon fiber formed products. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure provided by the present invention.

[0013] Figure 2 This is a schematic diagram of the structure of the first heating mechanism provided by the present invention.

[0014] Figure 3 This is a schematic diagram of the structure of the first vacuum pumping mechanism provided by the present invention.

[0015] Figure 4 This is an exploded schematic diagram of the first vacuum pumping mechanism provided by the present invention.

[0016] Figure 5 This is a schematic diagram of the structure of part A provided by the present invention.

[0017] Figure 6 This is a schematic diagram of the structure of the first air extraction nozzle provided by the present invention.

[0018] Figure 7 This is an exploded schematic diagram of the first diaphragm pressing mechanism provided by the present invention.

[0019] Figure 8 This is a schematic diagram of the structure of part B provided by the present invention.

[0020] Figure 9 This is a schematic diagram of the structure of the first connecting buckle provided by the present invention.

[0021] Figure 10 This is a schematic diagram of the structure of the first sealing strip provided by the present invention.

[0022] The reference numerals in the attached drawings include: 100, first support frame; 110, first vacuum frame; 111, first air channel groove; 112, first sealing groove; 113, first mounting port; 120, first cover plate; 121, first through hole; 130, first vacuum panel; 131, first air extraction hole; 140, first sealing ring; 150, first air extraction nozzle; 160, first locking post; 170, first clamp; 171, first clip; 210, first profile; 211, first slot; 212, first connecting hole; 220, first sealing strip; 230, first connecting buckle; 231, second through hole; 232, second connecting hole; 240, first diaphragm; 300, second support frame; 310, first heating frame; 320, first heating block. Detailed Implementation

[0023] This invention discloses an infrared heating curved surface thermal insulation film forming device and its forming method. The specific implementation of this invention will be further described below with reference to preferred embodiments.

[0024] See attached diagram. Figure 1-10 , Figure 1 This is a structural schematic diagram provided by the present invention. Figure 2 This is a schematic diagram of the structure of the first heating mechanism provided by the present invention. Figure 3 This is a schematic diagram of the structure of the first vacuum pumping mechanism provided by the present invention. Figure 4 This is an exploded schematic diagram of the first vacuum pumping mechanism provided by the present invention. Figure 5 This is a schematic diagram of the structure of part A provided by the present invention. Figure 6 This is a schematic diagram of the structure of the first air extraction nozzle 150 provided by the present invention. Figure 7 This is an exploded view of the first diaphragm 240 pressing mechanism provided by the present invention. Figure 8 This is a schematic diagram of the structure of part B provided by the present invention. Figure 9 This is a schematic diagram of the structure of the first connecting buckle 230 provided by the present invention. Figure 10 This is a schematic diagram of the structure of the first sealing strip 220 provided by the present invention.

[0025] Preferred embodiment.

[0026] This embodiment provides an infrared heating curved thermal insulation film forming device, including a first vacuum platform, a first heating mechanism, and a first diaphragm 240 pressing mechanism. The vacuum platform includes a first support frame 100, a first vacuum frame 110, a first vacuum panel 130, and a first air pump. The first vacuum frame 110 is disposed at the upper end of the first support frame 100, the first vacuum panel 130 is disposed at the upper end of the first vacuum frame 110, the first air pump is disposed below the first support frame 100, and a first air nozzle 150 is provided at the lower end of the first vacuum frame 110. The first air nozzle 150 is connected to the first air pump. The first heating mechanism is located at the front end of the first vacuum platform. The first heating mechanism includes a second support frame 300, a first heating frame 310, and a plurality of first heating blocks 320. The first heating frame 310 is located at the upper end of the second support frame 300, and the first heating blocks 320 are located at the lower end of the first heating frame 310. The first heating blocks 320 are arranged in a matrix, and the first heating blocks 320 are infrared heaters. The first diaphragm 240 pressing mechanism is disposed at the front end of the first vacuum frame 110. The first diaphragm 240 pressing mechanism includes a first diaphragm 240 frame and a first diaphragm 240. The first diaphragm 240 frame is hinged to the front end of the first vacuum frame 110. The first diaphragm 240 is disposed at the upper end of the first diaphragm 240 frame. The first diaphragm 240 frame matches the first vacuum frame 110.

[0027] Furthermore, the first vacuum frame 110 includes a first airway platform and a first cover plate 120. The upper end of the first airway platform is provided with a plurality of first airway grooves 111, which are arranged vertically in a grid pattern. The first suction nozzle 150 is connected to the first airway grooves 111. The first cover plate 120 is disposed at the upper end of the first airway platform. The first cover plate 120 is provided with a plurality of first through holes 121, which correspond to the upper part of the first airway grooves 111 and are arranged in a matrix. The first vacuum panel 130 is provided with a plurality of first suction holes 131, which correspond one-to-one with the first through holes 121 and the first suction holes 131.

[0028] Furthermore, the upper end of the first diaphragm 240 frame is provided with a first profile 210, a first connecting buckle 230 and a first sealing strip 220. The outer side of the first profile 210 is provided with a first slot 211, and the first sealing strip 220 matches the first slot 211. The two ends of the first profile 210 are provided with first connecting holes 212. The first connecting buckle 230 is provided with second connecting holes 232 on adjacent sides, and the second connecting holes 232 match the first connecting holes 212. The first connecting buckle 230 is provided with second through holes 231 on other adjacent ends, and the second through holes 231 correspond to the second connecting holes 232.

[0029] Furthermore, the first diaphragm 240 frame is hinged at both ends with a first connecting rod, the rear end of the first connecting rod is provided with a plurality of first slots, and the first vacuum frame 110 is provided at both ends with first locking posts 160, the first slots matching the first locking posts 160.

[0030] Furthermore, the first vacuum frame 110 is provided with a plurality of first clamps 170, and the first diaphragm 240 frame is provided with a plurality of first buckles 171. The first clamps 170 and the first buckles 171 correspond one-to-one. The upper end of the first vacuum frame 110 is provided with a first sealing groove 112, and a first sealing ring 140 is provided in the first sealing groove 112.

[0031] Furthermore, the first heating mechanism includes a first temperature measuring component, which includes a first temperature monitoring instrument and a first thermocouple. The first temperature monitoring instrument is disposed at the lower end of the first vacuum frame 110. The lower end of the first vacuum frame 110 is provided with a plurality of first mounting ports 113. The first thermocouple is disposed in the first mounting port 113 and is connected to the first temperature monitoring instrument.

[0032] A method for forming an infrared-heated curved thermal insulation film includes the following steps: Step S1: Assemble the molding equipment, fix the first cover plate 120 to the upper end of the first vacuum frame 110, place the first sealing ring 140 in the first sealing groove 112, place the first diaphragm 240 on the upper end of the first diaphragm 240 frame, use the first sealing strip 220 to hold the first diaphragm 240 around the perimeter in the first slot 211, fix the first thermocouple in the first mounting port 113, and connect it to the first temperature monitoring instrument; Step S2: Molding mold installation. Place the molding mold on the upper end of the first vacuum panel 130, then place the carbon fiber prepreg on the upper end of the molding mold, flip the first diaphragm 240 frame to the upper end of the first vacuum frame 110, and use the first clamp 170 to hang the first clip 171 to fix the first diaphragm 240 frame and the first vacuum frame 110. Step S3: Carbon fiber forming. The second support frame 300 is moved to move the first heating frame 310 directly above the frame of the first diaphragm 240. The first heating block 320 is turned on to heat and soften the carbon fiber prepreg. The first thermocouple and the first temperature monitoring instrument detect the temperature. The first vacuum pump draws a vacuum to tighten the first diaphragm 240, so that the carbon fiber prepreg is tightly attached to the forming mold, thereby realizing the curved surface forming of the carbon fiber prepreg.

[0033] In addition, rollers are provided at the lower ends of the first support frame 100 and the second support frame 300 to move the first vacuum frame 110 and the first diaphragm 240 frame. When the first diaphragm 240 frame is opened, the second support frame 300 is moved to leave room for flipping. Then the first diaphragm 240 is fixed. After the molding mold and carbon fiber prepreg are placed, the first diaphragm 240 frame is flipped over and covered. The first vacuum frame 110 and the first diaphragm 240 frame are fixed by the first clamp 170 and the first buckle 171. At the same time, the first sealing ring 140 is also squeezed to ensure the sealing between the first vacuum frame 110 and the first diaphragm 240 frame. The second support frame 300 is moved to the front end of the first support frame 100, that is, the first heating block 320 is moved above the molding die and the carbon fiber prepreg. The first heating block 320 can be individually controlled to turn on. Multiple temperature sensors from the first thermocouples detect the temperature of multiple areas, facilitating temperature adjustment and aiding in the molding of the carbon fiber prepreg. At least four first thermocouples are provided to ensure that the temperature of the carbon fiber prepreg area remains within a reasonable range. After reheating for a certain period, once the carbon fiber prepreg has softened, the first vacuum pump extracts air at a pumping speed of 280 m / s. 3 When the vacuum degree is 0.08 MPa, the first diaphragm 240 contracts and causes the carbon fiber prepreg to adhere tightly to the molding die, thus completing the molding of the carbon fiber prepreg. The first diaphragm 240 is typically made of silicone film, which has good elasticity.

[0034] This application controls the individual switching of the first heating block 320 in the corresponding area by measuring and feeding back the temperature of multiple first thermocouples in a localized area. This reduces the use of the first heating block 320 in the unused area. Furthermore, by using infrared heating, it can directly penetrate the first diaphragm 240 and act directly on the carbon fiber prepreg, increasing the heating rate by more than 50%. Through the combination of multi-band infrared, it achieves synchronous curing of the molding die and the carbon fiber prepreg. Compared with traditional hot air heating, it can reduce energy consumption by 30-40% and realize small-batch, low-cost production of small and medium-sized carbon fiber molded products.

[0035] It is worth mentioning that the technical features of the first thermocouple and the first temperature monitoring instrument involved in this patent application should be regarded as prior art. The specific structure, working principle and possible control method and spatial arrangement of these technical features can be adopted by conventional choices in the field, and should not be regarded as the inventive point of this patent. This patent will not be further elaborated in detail.

[0036] For those skilled in the art, modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the protection scope of this invention.

Claims

1. An infrared heating curved surface thermal insulation film forming device, characterized in that, The system includes a first vacuum platform, a first heating mechanism, and a first diaphragm (240) pressing mechanism. The vacuum platform includes a first support frame (100), a first vacuum frame (110), a first vacuum panel (130), and a first air pump. The first vacuum frame (110) is located at the upper end of the first support frame (100), the first vacuum panel (130) is located at the upper end of the first vacuum frame (110), and the first air pump is located below the first support frame (100). The lower end of the first vacuum frame (110) is provided with a first air nozzle (150), which is connected to the first air pump. The first heating mechanism is located at the front end of the first vacuum platform. The first heating mechanism includes a second support frame (300), a first heating frame (310), and a plurality of first heating blocks (320). The first heating frame (310) is located at the upper end of the second support frame (300), and the first heating blocks (320) are located at the lower end of the first heating frame (310). The first heating blocks (320) are arranged in a matrix, and the first heating blocks (320) are infrared heaters. The first diaphragm (240) pressing mechanism is disposed at the front end of the first vacuum frame (110). The first diaphragm (240) pressing mechanism includes a first diaphragm (240) frame and a first diaphragm (240). The first diaphragm (240) frame is hinged to the front end of the first vacuum frame (110). The first diaphragm (240) is disposed at the upper end of the first diaphragm (240) frame. The first diaphragm (240) frame matches the first vacuum frame (110).

2. The infrared heating curved surface thermal insulation film forming equipment according to claim 1, characterized in that, The first vacuum frame (110) includes a first airway platform and a first cover plate (120). The upper end of the first airway platform is provided with a plurality of first airway grooves (111). The first airway grooves (111) are arranged vertically in a grid pattern. The first suction nozzle (150) is connected to the first airway grooves (111). The first cover plate (120) is located at the upper end of the first airway platform. The first cover plate (120) is provided with a plurality of first through holes (121). The first through holes (121) correspond to the upper part of the first airway grooves (111). The first through holes (121) are arranged in a matrix. The first vacuum panel (130) is provided with a plurality of first suction holes (131). The first through holes (121) correspond one-to-one with the first suction holes (131).

3. The infrared heating curved surface thermal insulation film forming equipment according to claim 2, characterized in that, The upper end of the first diaphragm (240) frame is provided with a first profile (210), a first connecting buckle (230) and a first sealing strip (220). The outer side of the first profile (210) is provided with a first slot (211). The first sealing strip (220) matches the first slot (211). The two ends of the first profile (210) are provided with first connecting holes (212). The first connecting buckle (230) is provided with second connecting holes (232) on adjacent sides. The second connecting holes (232) match the first connecting holes (212). The first connecting buckle (230) is provided with second through holes (231) on other adjacent ends. The second through holes (231) correspond to the second connecting holes (232).

4. The infrared heating curved surface thermal insulation film forming equipment according to claim 3, characterized in that, The first diaphragm (240) frame is hinged at both ends with a first connecting rod, and the rear end of the first connecting rod is provided with a plurality of first bayonets. The first vacuum frame (110) is provided at both ends with first locking posts (160), and the first bayonets match the first locking posts (160).

5. The infrared heating curved surface thermal insulation film forming equipment according to claim 4, characterized in that, The first vacuum frame (110) is provided with a plurality of first clamps (170), and the first diaphragm (240) frame is provided with a plurality of first buckles (171). The first clamps (170) and the first buckles (171) correspond one to one. The upper end of the first vacuum frame (110) is provided with a first sealing groove (112), and a first sealing ring (140) is provided in the first sealing groove (112).

6. The infrared heating curved surface thermal insulation film forming equipment according to claim 5, characterized in that, The first heating mechanism includes a first temperature measuring component, which includes a first temperature monitoring instrument and a first thermocouple. The first temperature monitoring instrument is located at the lower end of the first vacuum frame (110). The lower end of the first vacuum frame (110) is provided with a plurality of first mounting ports (113). The first thermocouple is located in the first mounting port (113) and is connected to the first temperature monitoring instrument.

7. A method for forming an infrared-heated curved surface thermal insulation film, implemented using the infrared-heated curved surface thermal insulation film forming equipment according to any one of claims 1-6, characterized in that, Includes the following steps: Step S1: Assemble the molding equipment, fix the first cover plate (120) to the upper end of the first vacuum frame (110), place the first sealing ring (140) in the first sealing groove (112), place the first diaphragm (240) at the upper end of the first diaphragm (240) frame, use the first sealing strip (220) to clamp the first diaphragm (240) around the first slot (211), fix the first thermocouple in the first mounting port (113), and connect it to the first temperature monitoring instrument; Step S2: Molding mold installation. Place the molding mold on the upper end of the first vacuum panel (130), then place the carbon fiber prepreg on the upper end of the molding mold, and flip the first diaphragm (240) frame to the upper end of the first vacuum frame (110) by the rear end. Use the first clamp (170) to hang the first clip (171) to fix the first diaphragm (240) frame and the first vacuum frame (110). Step S3: Carbon fiber forming. Move the second support frame (300) to move the first heating frame (310) directly above the first diaphragm (240) frame. Turn on the first heating block (320) to heat and soften the carbon fiber prepreg. The first thermocouple and the first temperature detector detect the temperature. The first vacuum pump draws a vacuum to tighten the first diaphragm (240) so that the carbon fiber prepreg is tightly attached to the forming mold, thereby realizing the curved surface forming of the carbon fiber prepreg.

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