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It is important to use reusable plant resources effectively from the viewpoint of the reduction in carbon-dioxide emission and the sustainable use of resources in the future. In this study, injection molding using only steamed bamboo powder by means of an industrial machine was carried out as a basic study of the formation of wood plastic composites (WPC) and natural fiber reinforced plastics (NFRP) of high wood ratio. First, as an injection feature, pressure behavior in injection was investigated and the effects of the temperatures of the nozzle and cylinder and injection speed were examined. Secondly, injection molding was attempted, and the effects of nozzle temperature and injection speed on injection molding properties and the bending strength of the products were examined. The results show that the injection molding properties improved with increasing temperature of the nozzle and cylinder, and that it was possible to inject materials by adjusting the temperature of the material to 150°C or more. Moreover, it was possible to realize good product filling into a mold perfectly under appropriate conditions. Also, it was possible to realize products with a bending strength exceeding 40MPa.

Examination of Injection Molding Properties of Nozzle and Attempt of Product Filling into Mold in Injection Molding of Only Steamed Bamboo Powder