| 摘要 |
An apparatus is disclosed for producing fiber reinforced plastics wherein the fibers are more uniformly dispersed throughout the resin. Briefly, the apparatus includes an extrusion means and a means for feeding glass fibers and thermoplastic resin thereto, said extrusion means comprising a two-stage extruder having a multiflight extruder screw extending through the two stages and defining within each stage, respectively, a feed zone, a transition zone and a metering zone, the compression ratio in the first stage being in the range of about 3:1 to 5:1, the compression ratio in the second stage being in the range of about 1.5:1 to 3.5:1, and the ratio of the flight depth of the extruder screw in the second stage feed zone to the flight depth of the extruder screw in the first stage feed zone being in the range of about 1:1.25 to 1:2.5, said extruder screw being provided with flow deflection means in the second stage metering zone to cause uniform dispersion of the fibers throughout the resin.
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