Feasibility Study On The Quenching Preparation Process Of Aluminum Foil And Preliminary Design Of The Device

The quenching technology with inner concaved belt was inspired by singleroller method. In single roller melt spinning, the product sprayed onto inner surfaceis better than outer. The rapid solidification with inner concave belt substitutes thesingle roller for concave belt, making continuous manufacture possible. Thetraditional foil production methods has a complex long process, high investmentin equipment, and the technical requirements are relatively high.Applying the rapid solidification with inner concave belt to producingaluminum foil, not only can shorten production process and lower investment inequipment, but also can make foil, to some extent, with some advantages of rapidsolidification phase.Through the theoretical analysis of carrier tape and aluminum foil intemperature, mathematical model is established. The mathematical model analysisshow that the temperature of carrier strip and aluminum foil changes exponentiallywith time. Complete solidification time of aluminum foil decreases with the specificheat, density, thermal conductivity of carrier tap and the heat transfer coefficient.According to the mathematical model, when using0.4mm copper tape as the carriertape, the temperature curve of aluminum foil was obtained. Before completesolidification, the cooling rate of aluminum foil is4770℃/s, meeting therequirement of rapid solidification. This is also theoretically verified the feasibility.Because of the poor weldability and no resource,304stainless steel tap was used ascarrier tap. ANSYS was used to do the temperature simulation, to compensate forthe lack of theoretical models. The results show that the time needed beforecomplete solidification is0.018s, the cooling rate reaching to7000℃/s. The carrierbelt was cooled by the aluminum pulley, with temperature range of50℃~250℃.Based on the above results, the preliminary design of device was complete. Theexperimental design includes: power and transmission system, body portion andinjection system. Using YVP90S-4variable speed motor as power source, withV-belt drive, a continuously variable belt speed was achieved. Flotation was used torestrict the carrier belt, and setting a protective cover makes the injection under theprotective atmosphere.310S stainless steel was used as the material of the crucible, with good workability and prolonged use.The strong and rigidity checking of eachpart and the vibration analysis showed that the device can meet the requirements.