Abstract:

The lattice Boltzmann method at representative elementary volume (REV）scale was used to simulate transverse impregnation for LWRT (light-weight reinforced thermoplastic), and it offers a new method for the prediction of impregnation velocity and time.The effects of press manner, loading, temperature and the structure of the double-belt press on impregnation were investigated.The results showed that the double-belt press was more effective in shortening impregnation time compared with the flat press owing to its alternating high/low pressure distribution.Besides, it was found that impregnation was determined by not only the maximum impregnation velocity but also the residence time under high pressure.The maximum impregnation velocity could be improved by enhancing loading and increasing temperature as well.The residence time was more sensitive to the diameter of the roller of double-belt press and loading.However, it was impossible to shorten the impregnation time only by adjusting the processing velocity of the belt.