The selection of material and the set-up of process parameters are the heart of our engineering services. Manufacturing of flat panels for
coupons is a common task. More complex tools are also used to validate the mechanical performances at higher level (sub-element level).
Our shop is the right place for our customers to manufacture their first full scale parts using RTM state-of-the-art industrial equipment (mold
and workstation).
RTM (Resin Transfer Molding):
- Uses dry reinforcement to make preform
- Tooling is generally steel or aluminum, on all surfaces
- Resin is thoroughly degassed and vacuum is drawn on tool
- Low viscosity RTM resin, <500 cps, infuses entire preform
- Resin pressure maintained at 7 to 8 bars during cure
SQRTM (Same Qualified Resin Transfer Molding):
Radius Engineering and Coexpair have created this innovative process for out-of-autoclave manufacturing:
- Allows use of program-specific prepreg (“same qualified”), including
toughened systems such as Hexply 8552 ®, Hexply M21 ®, Cycom 977 ®, Cycom 5250-4 ® BMI, Toray 3900-2 ® (BMS 8-276) - Fabrics or UD tapes previously laid by hand or using automatic devices (AFP, ATL)
- Tooling is aluminum, steel or Invar
- High vacuum is drawn on tool
- As tool is heated, small quantity of prepreg resin is injected into tool to fill tool cavity around edges of part and maintaining resin hydrostatic pressure at 8 - 9 Bar during cure
