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The extraction kinetics and mechanism of La (III) by P204-kerosine from phosphoric acid were investigated by constant interfacial cell with laminar flow. The effects of stirring speed, temperature, specific interface area on extraction rate were studied. The results indicated that a plateau region is appeared at the stirring speed of over 115r/min. The extraction apparent activation energy was calculated to be-13.40kJ/mol and the extraction process is controlled by a mixed mechanism of diffusion and chemical reaction. The rate equation of extraction was deduced. Under conditions of 25°C and interfacial area 19.64cm2, the extraction rate constant was 2.08×10-6 m·s-1·. Through the derivation of the reaction mechanism the reaction zone is at the liquid-liquid interface.

In the paper, the injection process of mold sleeve is simulated with Moldflow software, and the filling time, cavitation, weld, and causes warping are analyzed. The warping effects on the workpiece surface quality. Moldflow software can optimize gating system and shorten the fill time, improve the quality of plastic surface, reduce the number of repair mode, and shorten the product development cycle.

Based on multi-body dynamics, the virtual prototype model of the tape feeder is set up, and the impact of the external torque and the friction coefficient on the whole system is analyzed. Simulation results show that the external torque has great influence on the required motor torque: when the external torque increases from 50N.mm to 200N.mm, the required motor torque increases from 75.217N.mm to 223.98N.mm. The friction damping also has great influence on the motor torque: when the dynamic friction coefficient increases from 0.001 to 0.009 and the static friction coefficient increases from 0.003 to 0.011, the required motor torque increases from 106.92N.mm to 158.81 N.mm.