Abstract
Injection molded plates using fiber-reinforced plastics often exhibit deformation due to fiber orientation. We would expect thin injection molded plates to have different material flow rates and fiber interactions than general thickness (3mm) plates.
In this report, a detailed examination of the deformation, fiber orientation distribution and thermal expansion coefficient anisotropy in thin injection molded plates using fiber reinforced plastics was conducted, and the following conclusions were obtained.
1) Twisting (warpage) occurs in the thin injection molded plates using fiber-reinforced plastics.
2) Thin injection molded plates form a three layer structure normally seen in thicker 3mm plates, however, the boundaries between the layers become indistinct.
3) The material property distribution in each layer in the thin injection molding plate is quite large when compared with thicker 3mm injection molded plates.
4) Fiber orientation and anisotropy of the thermal expansion coefficient are likely causes for the generation of twist (warpage) in thin plates molded from fiber-reinforced plastics
