Forming method for variable cross-section hollow-structure composite part with high-precision inner surface
A composite material and molding method technology, applied in the field of autoclave molding of resin-based fiber-reinforced composite material prepreg, can solve the problems of vacuum leakage, expensive materials, and high cost, and achieve lower quality requirements, simple demoulding operation, and low cost low effect
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[0037] See Figure 1-Figure 7 . This embodiment provides a method for forming a composite material part 1 with a variable cross-section hollow structure with a high-precision inner surface. This method uses a forming core mold 3. See figure 2 and image 3 The molding core mold 3 includes a soft mold 31, a water-soluble core 32 and a support.
[0038] The soft mold 31 includes an outer rubber layer, an inner rubber layer, and a carbon fiber composite material layer between the outer rubber layer and the inner rubber layer. The space enclosed by the soft mold 31 is filled with a water-soluble core 32 made of a water-soluble material. In this embodiment, the water-soluble core 32 is made of a high-temperature-resistant water-soluble material, such as:
[0039] The number of support rods 33 is two. One support rod 33 is located at one end of the water-soluble core 32 and the other support rod 33 is located at the other end of the water-soluble core 32. One end of th...
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