A method for controlling temperature distribution of composite materials in an OoA process

Abstract

The application discloses a composite material temperature distribution control method in an OoA process, and uses aluminum foil paper as a surface heat absorption material of the composite material, the surface of the aluminum foil paper is subjected to a gas guide hole processing, the number of high-density holes P1 of the aluminum foil paper is greater than 10 holes / cm 2 , the number of medium-density holes P2 of the aluminum foil paper is 5-10 holes / cm 2 , and the number of low-density holes P3 of the aluminum foil paper is designed to be less than 5 holes / cm 2 ; the composite material temperature distribution control comprises the following steps: a. selecting the hole density of the aluminum foil paper according to the structure and gas guide requirement of the composite material, using the low-density holes P3 of the aluminum foil paper for a planar structure composite material, using the high-density holes P1 of the aluminum foil paper for a thick-wall structure composite material, and using the medium-density holes P2 of the aluminum foil paper for a multi-layer structure composite material. The composite material temperature distribution control method in the OoA process can rapidly absorb and transfer heat to the inside of the composite material by using the aluminum foil paper as the surface heat absorption material, so that rapid and uniform heating is achieved.

Description

Technical Field

[0001] This invention relates to the field of composite material production technology, specifically to a method for controlling the temperature distribution of composite materials in the OoA process. Background Technology

[0002] Temperature control is a key factor in ensuring material performance and quality during composite material manufacturing. Traditional composite material curing processes often require equipment such as autoclaves to achieve uniform heating and curing, but these devices are costly and complex to operate. In recent years, with the development of OoA (Out-of-Arrival) technology, people have begun to seek more economical and flexible composite material processing methods.

[0003] Currently, conventional OoA (Out of Arrangement) processes, especially oven curing processes, have lower heat transfer efficiency than autoclave processes, and the cured products are prone to localized delamination or dispersion defects. Furthermore, using additional auxiliary materials or processes to optimize these defects increases production costs or extends the production cycle.

[0004] Therefore, we propose a method for controlling the temperature distribution of composite materials in the OoA process to address the problems mentioned above. Summary of the Invention

[0005] The purpose of this invention is to provide a method for controlling the temperature distribution of composite materials in the OoA process, so as to solve the problems commonly used in the present invention mentioned above.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a method for controlling the temperature distribution of composite materials in an OoA process, using aluminum foil as the heat-absorbing material on the surface of the composite material, wherein the surface of the aluminum foil is treated with perforated air holes, the number of high-density holes P1 of the aluminum foil is greater than 10 holes / cm², the number of medium-density holes P2 of the aluminum foil is 5-10 holes / cm², and the number of low-density holes P3 of the aluminum foil is designed to be less than 5 holes / cm².

[0007] Temperature distribution control of composite materials includes the following steps:

[0008] a. The pore density of aluminum foil is selected according to the structure and air conduction requirements of the composite material. For planar composite materials, low-density pores P3 are used; for thick-walled composite materials, high-density pores P1 are used; and for multi-layer composite materials, medium-density pores P2 are used.

[0009] b. Use aluminum foil as the surface layer of the composite material laminate structure and place it in high-risk areas where defects are likely to occur;

[0010] c. Optimize the position, size, and quantity of aluminum foil based on the size, shape, and curing requirements of the composite material;

[0011] d. In the OoA process, the composite material is heated by an external heat source; the aluminum foil quickly absorbs the external heat and transfers the heat to the interior of the composite material, achieving rapid and uniform heating; the aluminum foil also acts as a heat insulation material during the curing process.

[0012] e. Use temperature sensors and infrared imaging equipment to monitor the temperature distribution of the composite material area in real time, obtain temperature data of different areas of the composite material during the curing process, adjust the heating parameters and the placement and quantity of aluminum foil, and adjust the heating parameters according to the following rules: when the temperature difference between areas is greater than 5°C, increase the heating power of the low temperature area or increase the number of aluminum foil covering layers; when the temperature difference between areas is less than 2°C, maintain the current heating parameters; when a local area is overheated, reduce the amount of aluminum foil covering or increase the hole diameter.

[0013] Preferably, the aluminum foil has a thermal conductivity of 200-235 W / (m·K) and a thickness of 10-20 μm.

[0014] Preferably, the hole diameter of the aluminum foil is 0.3-0.7 mm.

[0015] Preferably, in the thick-walled region, the high-density holes P1 of the aluminum foil have a hole count of 12 holes / cm² and a hole diameter of 0.5 mm.

[0016] Preferably, in thin-walled or edge areas, the aluminum foil has a low-density pore size P3 of 3 pores / cm² and a pore diameter of 0.4 mm.

[0017] Preferably, the external heat source is an infrared heating device, a curing oven, or other external controllable heat source, with a heating power density range of 5-15 W / cm².

[0018] Compared with the prior art, the beneficial effect of the present invention is: the method for controlling the temperature distribution of composite materials in the OoA process;

[0019] 1. Aluminum foil with high thermal conductivity and good mechanical properties is selected as the surface heat-absorbing material. The aluminum foil is pretreated by punching air vents to improve its heat absorption and air permeability.

[0020] 2. In the laminated structure of the composite material, aluminum foil is used as the surface layer. The position and quantity of the aluminum foil are optimized based on the size, shape, and curing requirements of the composite material.

[0021] 3. In the OoA process, the composite material is heated by an external heat source; aluminum foil, as a surface heat-absorbing material, can quickly absorb and transfer heat to the interior of the composite material, achieving rapid and uniform heating. During the curing process, the aluminum foil also plays a certain role in heat insulation, preventing excessive heat loss and ensuring curing quality.

[0022] 4. Utilize temperature sensors and imaging technology to monitor the temperature distribution of the composite material in real time, and adjust heating parameters and the position of aluminum foil based on the monitoring results to achieve the best curing effect. Detailed Implementation

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] This invention provides a technical solution: a method for controlling the temperature distribution of composite materials in an OoA process, using aluminum foil as the heat-absorbing material on the surface of the composite material, wherein the surface of the aluminum foil is treated with pores, the number of high-density pores P1 is greater than 10 pores / cm², the number of medium-density pores P2 is 5-10 pores / cm², and the number of low-density pores P3 is designed to be less than 5 pores / cm².

[0025] Temperature distribution control of composite materials includes the following steps:

[0026] a. The pore density of aluminum foil is selected according to the structure and air conduction requirements of the composite material. For planar composite materials, low-density pores P3 are used; for thick-walled composite materials, high-density pores P1 are used; and for multi-layer composite materials, medium-density pores P2 are used.

[0027] b. Use aluminum foil as the surface layer of the composite material laminate structure and place it in high-risk areas where defects are likely to occur;

[0028] c. Optimize the position, size, and quantity of aluminum foil based on the size, shape, and curing requirements of the composite material;

[0029] d. In the OoA process, the composite material is heated by an external heat source; the aluminum foil quickly absorbs the external heat and transfers the heat to the interior of the composite material, achieving rapid and uniform heating; the aluminum foil also acts as a heat insulation material during the curing process.

[0030] e. Use temperature sensors and infrared imaging equipment to monitor the temperature distribution of the composite material area in real time, obtain temperature data of different areas of the composite material during the curing process, adjust the heating parameters and the placement and quantity of aluminum foil, and adjust the heating parameters according to the following rules: when the temperature difference between areas is greater than 5°C, increase the heating power of the low temperature area or increase the number of aluminum foil covering layers; when the temperature difference between areas is less than 2°C, maintain the current heating parameters; when a local area is overheated, reduce the number of aluminum foil covering layers or increase the perforation diameter.

[0031] Aluminum foil is mainly used as an auxiliary material in the OoA (Out of Arrival) forming process. It is placed on the product surface, in areas prone to defects, after the product is laid out and assembled into bags, thus improving product quality and increasing the yield rate. Furthermore, air permeability is crucial in OoA process research, requiring the aluminum foil to be pre-perforated to enhance air permeability.

[0032] Based on the shape, size, and air conduction requirements of the composite material, the aluminum foil is pre-treated as follows, including perforation: The pore density and diameter are set according to the air conduction requirements; for planar composite materials, low-density pores (P3) are used; for thick-walled composite materials, high-density pores (P1) are used; and for multi-layer composite materials, medium-density pores (P2) are used. The pore density is increased in complex-shaped areas to enhance air conduction. The aluminum foil is cut according to the size and shape of the composite material to ensure coverage of critical areas, especially areas with high thickness or complex geometry.

[0033] The composite material is heated by an external heat source, with an initial power setting (e.g., 50W / cm²) for slow preheating at a low temperature to avoid defects caused by excessive initial temperature differences. The high thermal conductivity of the aluminum foil allows heat to be rapidly transferred to the interior of the composite material, achieving fast and uniform heating. Multi-point temperature sensors are used to collect real-time temperature data from various areas of the composite material; the data is then transmitted to a data analysis module to generate a heat distribution map.

[0034] The treated aluminum foil is laid on the surface of the composite material. The number of aluminum foil layers is increased in thick-walled areas where heat transfer is difficult, edge areas, and curved surfaces or inner corners where gas tends to accumulate. For thicker composite materials, aluminum foil interlayers are added between different layers to form a multi-channel structure for heat transfer and gas conduction. The position of the aluminum foil is adjusted in real time based on temperature sensor data to optimize the coverage.

[0035] The temperature difference between each region is calculated to determine if there is localized overheating or underheating. If an anomaly is detected, heating parameter adjustment suggestions are generated. Heating power is increased or decreased, heating time or equipment position is adjusted, and the coverage area and number of aluminum foil layers are adjusted as needed. Temperature data is continuously collected during the heating process to ensure the curing temperature of the composite material is controlled within the set range. When the regional temperature difference is greater than 5°C, the heating power in the low-temperature region is increased or the number of aluminum foil layers is increased. When the regional temperature difference is less than 2°C, the current heating parameters are maintained. When a localized area overheats, the amount of aluminum foil coverage is reduced or the perforation diameter is increased. This is the entire working process of the composite material temperature distribution control method in this OoA process.

[0036] The contents not described in detail in this specification are existing technologies known to those skilled in the art. All standard parts used in this invention can be purchased commercially. The specific connection methods for each part all employ conventional methods such as bolts, rivets, and welding, which are mature technologies in the prior art. The machinery, parts, and equipment all use conventional models from the prior art, and the circuit connections also use conventional connection methods from the prior art, which will not be described in detail here.

[0037] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for controlling the temperature distribution of composite materials in an OoA process, characterized in that, Aluminum foil is used as the heat-absorbing material on the surface of the composite material. The surface of the aluminum foil is treated with pores. The number of pores P1 of the aluminum foil is greater than 10 pores / cm², the number of pores P2 of the aluminum foil is 5-10 pores / cm², and the number of pores P3 of the aluminum foil is designed to be less than 5 pores / cm². Temperature distribution control of composite materials includes the following steps: a. The pore density of aluminum foil is selected according to the structure and air conduction requirements of the composite material. For planar composite materials, low-density pores P3 are used; for thick-walled composite materials, high-density pores P1 are used; and for multi-layer composite materials, medium-density pores P2 are used. b. Use aluminum foil as the surface layer of the composite material laminate structure and place it in high-risk areas where defects are likely to occur; c. Adjust the position, size, and quantity of aluminum foil according to the size, shape, and curing requirements of the composite material; d. In the OoA process, the composite material is heated by an external heat source; the aluminum foil quickly absorbs the external heat and transfers the heat to the interior of the composite material, achieving rapid and uniform heating; the aluminum foil also acts as a heat insulation material during the curing process. e. Use temperature sensors and infrared imaging equipment to monitor the temperature distribution of the composite material area in real time, obtain temperature data of different areas of the composite material during the curing process, adjust the heating parameters and the placement and quantity of aluminum foil, and adjust the heating parameters according to the following rules: when the temperature difference between areas is greater than 5°C, increase the heating power of the low temperature area or increase the number of aluminum foil covering layers; when the temperature difference between areas is less than 2°C, maintain the current heating parameters; when a local area is overheated, reduce the amount of aluminum foil covering or increase the hole diameter.

2. The method for controlling the temperature distribution of composite materials in the OoA process according to claim 1, characterized in that: The aluminum foil has a thermal conductivity of 200-235 W / (m·K) and a thickness of 10-20 μm.

3. The method for controlling the temperature distribution of composite materials in the OoA process according to claim 1, characterized in that: The aperture diameter of the aluminum foil is 0.3-0.7 mm.

4. The method for controlling the temperature distribution of composite materials in the OoA process according to claim 2, characterized in that: In the thick-walled region, the high-density perforation P1 of the aluminum foil has 12 holes / cm², and the hole diameter is 0.5mm.

5. The method for controlling the temperature distribution of composite materials in an OoA process according to claim 2, characterized in that: In thin-walled or edge areas, the aluminum foil has a low-density pore size P3 of 3 pores / cm² and a pore diameter of 0.4 mm.

6. The method for controlling the temperature distribution of composite materials in an OoA process according to claim 1, characterized in that: The external heat source is an infrared heating device, a curing oven, or other external controllable heat source, with a heating power density range of 5-15W / cm².