高精度复合材� �天线反射面蒙� ��成型方法.pdf

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Patent Information

Patent application number: 202011374274.9
Application date: 2020.11.30
Applicant: Shanghai Composite Materials Technology Co., Ltd.
Inventors: Zhang Yuji, Cheng Zubai, Liang Yanmin, Ke Changyi, Ye Penghua, Li Xiangyu, Hou Xiaolong, Xu Yunyan, Liu Qibao

Invention

Title: High-precision composite material antenna reflector skin molding method
Background: The invention relates to a method for molding high-precision composite material antenna reflectors, which are used in space exploration.
Problem: Existing methods have difficulty achieving high precision and low porosity, and require secondary processing, which increases cost and production time.

Method

Step 1: Apply a release agent to the surface of a high-precision mold.
Step 2: Preheat the prepreg material and lay it on the mold surface.
Step 3: Cover the prepreg material with a low-permeability release film.
Step 4: Vacuum and heat-press the mold to cure the prepreg material, and then demold the reflector skin.

Key Features

The method uses a high-precision mold with a precision of 1.5-2 times the required precision of the reflector skin.
The prepreg material has a resin content of 36% ± 2% and a low-permeability release film with a permeability rate of 0.05-0.1 m/s.
The curing process involves vacuum and heat-pressing at a temperature of 120-180°C and a pressure of 0.5-1 MPa.
The resulting reflector skin has a thickness of ≤ 0.6 mm, a porosity rate of ≤ 2%, and a surface roughness of R.M.S = 0.03 mm.

Advantages

The method achieves high precision and low porosity in a single molding process, reducing production cost and time.
The resulting reflector skin has a smooth surface and a low porosity rate, which improves its performance and durability.
The method can be used to produce high-precision composite material antenna reflectors with complex shapes and structures.