EXTRUDING DEVICE AND METHOD FOR MIXING FIBERS AND THERMOPLASTIC PLASTICS.

摘要

Multiple extruder apparatus for compounding thermoplastic resin and reinforcing fibers incorporates a resin extruder (4) in which thermoplastic resin pellets are melted and a compounding extruder (8) in which the molten thermoplastic resin is mixed in intimate contact with long reinforcing fibers of at least one inch in length. The melted thermoplastic resin is introduced into the compounding extruder (8) at a point (46a) downstream of the inlet point (62) for the reinforcing fibers, so that the fibers are mechanically worked and heated before coming into contact with heated, molten thermoplastic resin. The extrudate from the compounding extruder (8) consists of a homogeneous, molten mass of thermoplastic resin having discrete lengths of fibers randomly dispersed therein.