LFI - Long Fiber injection process is employed to produce interior car components in which there are less mechanical properties but the design is more complex, such as:
- dashboards,
- interior panels and
- under body shields...
In this process a chopper sprays from an assembled Roving, 25 to 50mm long chopped strands into a temperature controlled mold. A liquid mixing of isocyanate and polyol and catalyst is sprayed in the same time.
Once those components are sprayed in the mold in less than 10 seconds, the mold is closed and filled in by the expansion of a polyurethane foam, resulting of the reaction of the liquid. 2 or 3 minutes later, the polymerization is finished and the part can be unmolded and trimmed. If several moulds are available, this process offers a high productivity to produce light weight reinforced polyurethane parts.