| 摘要 |
<p>PURPOSE: To enable compounding of reinforcing fibers of discontinuous length which are randomly dispersed in a thermoplastic resin by using a two-discrete part extruder equipped with a first resin extruder and a second compounding extruder. CONSTITUTION: A thermoplastic resin is supplied to an extruder 4, preferably in the form of pellets, from a drum or a container 26, and then is melted in a barrel 14 and the molten resin is conveyed into a compounding extruder 8 from the extruder 4 by the pumping action of an extruder screw. A supply source 10 for reinforcing fibers is connected to a first inlet aperture part 62. The reinforcing fibers are supplied to the compounding extruder 8 at a rate controlled to the specified length. In the compounding extruder 8, the molten thermoplastic resin and the reinforcing fibers of individually different lengths are homogeneously mixed and compounded in order to make a homogeneous mass. Further, the molten mass of the thermoplastic resin containing the reinforcing fibers of individually different discontinuous lengths which are randomly dispersed in the resin is formed in the barrel 50 of the compounding extruder 8 by the mechanical action of a power screw 52. After that, the formed resin is sent under pressure as an extrusion material, to the extrusion end 8b of the extruder 8 by the power screw 52.</p> |
