We developed a processing technique to apply plastic deformation to solid bamboo impregnated with thermosetting resin. To prevent the forming defects such as incomplete filling during upset forgings, we investigated the factors that affect the deformability of the bamboo. We conducted compression tests of the bamboo impregnated with phenol-formaldehyde resin using flat dies. The die temperature and the presence or absence of the lubricant were varied to change the thermal softening/hardening conditions of the impregnated bamboo and the friction characteristics between the bamboo and the dies, respectively. The compressed bamboo samples extended in a perpendicular direction to the bamboo fibers, and the extension ratio (E_t) was higher when a lubricant was compared to that in a no-lubricant condition. The change in the E_t with temperature was different between the without- and with- lubricant conditions. The results suggest that the friction on the dies significantly affects the deformability of the sample with no lubricant; however, the effect of friction was smaller than that of the flow stress of the bamboo, when the lubricant was used. The polymerization speed of the impregnated resin in the bamboo is also an important factor that affects the deformability of the samples, especially under low-friction conditions. To form a thin and large or complex shape product via flow forming, it is preferable to compress at a low temperature at which the impregnated resin does not polymerize with friction minimized.

我们开发了一种加工技术，以将塑性变形应用于浸渍有热固性树脂的固体竹子。为了防止up锻过程中填充不完全等成型缺陷，我们研究了影响竹子可变形性的因素。我们使用平模对用酚醛树脂浸渍的竹子进行压缩测试。改变模头温度和润滑剂的存在与否，以分别改变浸渍的竹子的热软化/硬化条件以及竹子和模子之间的摩擦特性。压缩的竹样品在垂直于竹纤维的方向上延伸，延伸比（E _t当将润滑剂与无润滑剂条件下的润滑剂相比时，）更高。在无润滑和有润滑条件下，E _t随温度的变化是不同的。结果表明，在没有润滑剂的情况下，模具上的摩擦会显着影响样品的可变形性。但是，当使用润滑剂时，摩擦的作用小于竹子的流动应力。竹子中浸渍树脂的聚合速度也是影响样品变形性的重要因素，尤其是在低摩擦条件下。为了通过流动成型形成薄而大或复杂形状的产品，优选在浸渍树脂不聚合且摩擦最小化的低温下压缩。