Local heat clamp bending equipment for carbon fiber-reinforced thermoplastic (CFRTP) sheets has been developed. The equipment holds a CFRTP sheet with thin metal foils to heat the bending region to the resign melting temperature and then bends the sheet keeping the hold by the foils under continuous pressure application during cooling. Using this equipment, it has been revealed that even a unidirectional continuous carbon fiber sheet can be locally bent by the in-plane wavy deformation of the fiber in the inner plies, while keeping the same profile length of the outside ply. In contrast, in the bending of unidirectional carbon fiber sheets with cutting at constant length, a combination of the wavy deformation of the inside ply and expansion of the outside ply has been observed. The developed bending equipment will be useful for the bending of CFRTP sheets similar to how a press brake is used for sheet metal forming. The development of the local heat clamp bending equipment will expand a field of bending for mass production using CFRTP sheets.

已经开发出用于碳纤维增强热塑性塑料（CFRTP）片材的局部热夹弯设备。设备将CFRTP薄板用薄金属箔固定，以将弯曲区域加热到指定的熔化温度，然后弯曲薄板，在冷却过程中在连续施加压力的情况下保持箔的固定。使用该设备，已经揭示出，即使单向连续碳纤维片材也可以通过在内层中纤维的平面内波浪形变形而局部弯曲，同时保持外层的轮廓长度相同。相反，在单向碳纤维片的弯曲与恒定长度的切割中，已经观察到内侧层的波浪形变形和外侧层的膨胀的组合。所开发的弯曲设备将对CFRTP板材的弯曲非常有用，类似于将折弯机用于钣金成型的方式。局部热夹弯设备的发展将扩大使用CFRTP板材进行批量生产的弯曲领域。