| 摘要 |
A method for molding a raw material comprising a plastic material or a mixture of plastic and non-plastic materials fed into a cylinder, where said raw material is subjected to a melt-kneading performed under oxygen-free conditions, and at the same time the molten material is sent from the tip of an extrusion screw towards the head section of said cylinder in straight flow conditions. The invention provides a method and equipment for performing satisfactory molding for plastics of poor fluidity or thermal stability or for plastic materials mixed with more than 10 to 30% by weight of wood flour, paper powders, stone powders, metal powders, fiber reinforcements and the like, without causing molding defects such as burn or cavitation; and also for raw materials mixed with more than several per cent by weight of metal powders or stone powders without causing excessive wear at the extrusion screw. <IMAGE> |
