Cooling belt press

Impregnation with PP is done on a double belt press that consolidates the fibers with PP under the influence of pressure and temperature. After the composites cool, the GMT semifinished product can be cut for specific applications. 

Pressing is similar in principle for all types. A heated platen or belt softens the resin, and flow occurs, together with a pre-determined degree of cure. After a defined heating cycle the laminate is cooled, either naturally in ambient conditions, or as part of the pre-determined press cycle with the aid of a coolant. Figure 3 shows typical pressing configurations. Table 1 indicates typical pressiues, temperatures and press cycle times. 

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