A model of two鄄dimensional temperature distribution in thermoplastic tow鄄placement process was es鄄
tablished and the effect of the speed and temperature of the hot gas on the process was studied. As the speed of the hot
air increased from 650 m/ s to 800 m/ s, convective heat transfer coefficient increased 150. Simulation for transient
heat conduction throughout the placement process was made by ANSYS,which studied the distribution and changes
with time of the composite component in the temperature field throughout the placement process. According to the com鄄
parison of changes of temperature field with time during placement at the speed of 40 mm/ s and 20 mm/ s,respective鄄
ly,it is proved that the slower of the speed,the higher of the temperature peak at the nip鄄point. As the speed de鄄
creased to 20 mm/ s, the temperature peak increased over 355益,which was the composite processing temperature.
Therefore, the speed at this condition should be lower than 20 mm/ s theoretically. Correctness of the mathematical
model of the temperature field is proved by comparison