| 摘要 |
A method for manufacturing a plastic structural article is disclosed that includes the steps of injecting a molten polymer composition through a nozzle into a mold having a first and a second mold portions defining a first cavity within the mold. A first fluid is injected into the first cavity that is partially filled with the molten polymer composition, pushing the molten polymer composition towards the walls of mold and a spillover trap forming a second cavity. The walls are cooled by the first fluid, which then removed. An aperture is cut in the wall. A plurality of pre-expanded beads is introduced through the aperture into the second cavity. The pre-expanded beads are expanded by injecting a second fluid forming an in-situ foam core thermally bonded to the wall. The plastic structural article is released from the mold. The structural plastic articles are also disclosed. |
