Figure 5. Novel induction heating process for high-rate manufacturing using double belt press. novel induction heating process at 1 m/min, as depicted in Figure 5. Two types of induction heating units were set in order to increase the material temperature before press zones. Temperature profiles were recorded with thermocouples at several positions through thickness of the laminate. Overall Evaluation of Composite Samples In order to evaluate impregnation quality, specimens were cut from the center of composite samples, and the cross-sections were polished and observed with a microscope. Void content analysis was conducted according to ISO14127 with a combustion procedure. Nine specimens were cut from the composite samples and submitted to the analysis. Three-points flexural test was conducted according to ISO14125. Five specimens with nominal dimensions of 260 x 15 x 6 mm were cut from composite samples with longitudinal directions. The maximum stress and modulus were calculated from stress-strain curves. The crosshead speed was 16 mm/min. RESULTS Temperature Profiles During Double Belt Press Process Recorded temperature profiles are shown in Figure 6 with the drawing of corresponding positions in double belt press. The temperatures were recorded at several positions of the laminate through thickness direction at the center of width. Figure 6a shows the temperature profile for standard process at a process velocity of 0.2 m/min. It can be observed that the temperature started to increase at the inlet and reached the resin melting temperature (225°C) at the third roller in press zones. 20-21sampe-quarterpage.indd 1 9/22/20 3:55 PM www. sampe.org NOVEMBER/DECEMBER 2021 | SAMPE JOURNAL | 23http://www.revchem.com http://www.sampe.org