| 摘要 |
PURPOSE:To improve the conductivity and physical property of a resin composition by adding the conductive chopped strand composed of carbon fiber into resin. CONSTITUTION:As fiber conductive chopper strand has high strength and high elasticity, it is preferably the carbon fiber with high reinforcing effect for resin, small specific gravity, 35-45 deg. angle of repose and 0.15-0.45g/cm<3> bulk density. The weight of material on a conveyer 7 is detected by a load cell 8. Out put voltage is compared with the voltage corresponding to both set values of transportation preliminarily set, and the error is amplified by a PID operational amplifier 9, and then the distribution amount of a feeder is regulated, while controlling the ignition angle of a thyristor 10. When the fibers are mutually splitted by the jamp or the amplitude shifting at a trough exhausting port in transportation owing to the low bulk density, the accuracy of constant feeding is improved by reducing the vibration angle of a plat spring 6. Consequently, the strand is accurately added and mixed into molten resin and the conductive conduction with excellent physical property may be obtained. |
