Preforming based on CF/PEKK prepreg continuous pultrusion process

Journal of physics(2023)

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摘要
Abstract Prepreg material is continuously bent and transformed on a Preformed mold, ultimately transitioning from a flat shape to a hat-shaped long beam cross-sectional shape as it enters the hot pressing mold. This process involves various factors such as the inherent properties of the prepreg material, the control of process parameters such as pressure and temperature, and geometric characteristics, all of which can affect the outcome. Inappropriate parameters may lead to defects such as wrinkling in the prepreg layers during the preforming process, which cannot be eliminated in subsequent hot pressing processes. Therefore, it is necessary to analyze the inducing factors that cause defects (wrinkles) in the prepreg layers during the preforming stage and to explore the optimal preforming method, enabling the prepreg layers to enter the hot pressing mold in an ideal hat-shaped form. This is of paramount importance for improving the quality of precast concrete, enhancing product stability, and increasing production efficiency.
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关键词
continuous pultrusion process,cf/pekk
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