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Fagor Arrasate has reduced the cost of producing carbon fiber reinforced composite (CFRP) automotive parts by employing the Compression Resin Transfer Molding (CRTM) process
.
Fagor Arrasate has reduced the cost of producing carbon fiber reinforced composite (CFRP) automotive parts by employing the Compression Resin Transfer Molding (CRTM) process
.
Compared with high pressure resin transfer molding (HP-RTM), the cost is reduced by 10% to 15%; compared with the autoclave process using prepreg, the cost is reduced by 20% to 30%
.
Fagor Arrasate has completed a comprehensive characterization of the CRTM process (casting, compression and infiltration) and materials (resins, fibers and binders) in order to identify and define the key parameters, actual cycle times and equipment required for mass production of automotive components
.
To test the technology, Fagor produced an A-surface carbon fiber hood for Maserati
.
As a method to reduce filling time and increase fiber content in CFRP, the CRTM process enables shorter pour times, shorter reaction times, and faster mold turnaround utilization
.
During CRTM processing, the mold is partially closed during pouring compared to conventional RTM
.
The highly permeable vacuum created between the preform and the top of the mold creates a preferential flow path for the resin to cover the entire surface of the workpiece
.
Once the desired amount of resin has been injected, the gate is closed and the mold begins to close until the final desired thickness is achieved, thereby also achieving the final desired fiber content
.
The resin is forced in to wet the preform during full mold closure, rather than flowing across the preform in a flat plane (flow perpendicular to thickness) as in the RTM process, which is the main reason for the reduction in soaking time, In contrast, conventional RTM processes require tens of minutes of soaking time
.
