EC-HLM Honeycomb liquid molding

Product catalog summary

Process Description: The EC-HLM process is a resin infusion technique combined with a honeycomb core, allowing for the production of a honeycomb sandwich structure without filling the cells with resin. This method is cost-effective, avoiding the need for autoclave technology and prepregs, while maintaining the mechanical stability and water-tightness of the composite.

Areas of Application: The process is suitable for both flat and curved (3D) parts, making it applicable for structural aerospace components. It meets the mechanical property requirements similar to autoclaved prepreg parts and is suitable for interior aircraft parts due to its compliance with FST (Flame, Smoke, and Toxicity) standards.

Mechanical Properties: The EC-HLM process demonstrates excellent mechanical properties, including high fiber volume fraction and weight reduction potential. Mechanical testing shows core failure in bending and tensile tests, indicating strong adhesive properties. Non-destructive testing confirms no porosity or delamination, and the panels are watertight according to Airbus standards.

Advantages for Customers: The EC-HLM process offers significant cost reductions by eliminating the need for expensive prepregs and autoclave processing. It provides flexibility in choosing different fabric and resin systems, and the sealed honeycomb core prevents water ingress, enhancing durability and reducing weight.

Conclusion: The EC-HLM process by EURO-COMPOSITES offers a competitive and efficient alternative to traditional composite manufacturing methods, providing high-quality, lightweight, and cost-effective solutions for aerospace applications.

Catalog excerpts

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table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:12.00pt "Franklin Gothic Medium", sans-serif; } .font1 { font:30.00pt "Franklin Gothic Medium", sans-serif; } Process description Areas of applications Mechanical properties compared to prepreg technology Which possibilities can we offer? The advantages for our customer Conclusion AXWHJKOCOMPOSIIl-S

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table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:12.00pt "Franklin Gothic Medium", sans-serif; } .font1 { font:18.00pt "Franklin Gothic Medium", sans-serif; } .font2 { font:30.00pt "Franklin Gothic Medium", sans-serif; } .font3 { font:40.00pt "Franklin Gothic Medium", sans-serif; } Honeycomb liquid molding: An overview It is a resin infusion process combinթe! with a honeycomb core. A honeycomb sandwich structure can be procluced with resin infused adjacent fabrics without filling the cells by infusion. Օ The honeycomb is water tight sealed and remains stable in...

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table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:12.00pt "Franklin Gothic Medium", sans-serif; } .font1 { font:18.00pt "Franklin Gothic Medium", sans-serif; } .font2 { font:21.00pt "Franklin Gothic Medium", sans-serif; } .font3 { font:26.00pt "Franklin Gothic Medium", sans-serif; } .font4 { font:30.00pt "Franklin Gothic Medium", sans-serif; } .font5 { font:40.00pt "Franklin Gothic Medium", sans-serif; } Honeycomb liquid moulding: The sketch Lay-up: A barrier layer and dry fabric are laid up in an integrated process Dry fabric/ fiber pack Barrier Core material Honeycomb...

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table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:16.00pt "Arial", sans-serif; } .font1 { font:12.00pt "Franklin Gothic Medium", sans-serif; } .font2 { font:15.00pt "Franklin Gothic Medium", sans-serif; } .font3 { font:21.00pt "Franklin Gothic Medium", sans-serif; } .font4 { font:26.00pt "Franklin Gothic Medium", sans-serif; } .font5 { font:40.00pt "Franklin Gothic Medium", sans-serif; } EC-HLM process. How is it done? vacuum pump Rein Resin inlet vent Resin trap Vacuum Bag Part in mold after layup Draining mdium facilit穢tes resin flow Peel-ply assures a uniform surface,...

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table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:21.00pt "Franklin Gothic Medium", sans-serif; } .font1 { font:30.00pt "Franklin Gothic Medium", sans-serif; } .font2 { font:40.00pt "Franklin Gothic Medium", sans-serif; } EC-HLM process: The part Integrated Infusion process: a) pre-curing of the barrier-core-bonding b) resin infusion & final cure Resin only in the

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table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:8.00pt "Arial", sans-serif; } .font1 { font:10.00pt "Arial", sans-serif; } .font2 { font:23.00pt "Arial", sans-serif; } EC-HLM: Sample Leading-Edge Radome Floor-Panels Landing gear door HTP- Fairing Belly-Fairing Bathtub Panels Flap-Track Fairings InnerOuter Barrel 7/20 © 2008 EURO-COMPOSITES

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table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:8.00pt "Arial", sans-serif; } .font1 { font:15.00pt "Arial", sans-serif; } .font2 { font:23.00pt "Arial", sans-serif; } EC-HLM: Sample Structural part: KEVLAR® honeycomb 3.2-40 with Carbon fabric G926 (6 layers on each side) infused with RTM6 (structural epoxy resin) 8/20 © 2008 EURO-COMPOSITES

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table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:8.00pt "Arial", sans-serif; } .font1 { font:15.00pt "Arial", sans-serif; } .font2 { font:23.00pt "Arial", sans-serif; } EC-HLM: Sample New Development: Resin Infusion with honeycomb for aircraft interior parts Current results: New resin EC-RI-FST without any flame retardant fillers, cold & hot curable Օ FAR 25853: flammability and smoke density within the specification Flat wise tensile: core failure Օ Tg: adjustable between 120 - 200° C Very good resin flow behavior ^ Օ Viscosity adjustable within the range of...

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table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:16.00pt "Arial", sans-serif; } .font1 { font:16.00pt "Franklin Gothic Medium", sans-serif; } .font2 { font:18.00pt "Franklin Gothic Medium", sans-serif; } .font3 { font:30.00pt "Franklin Gothic Medium", sans-serif; } .font4 { font:40.00pt "Franklin Gothic Medium", sans-serif; } EC-HLM: Mechanical properties Laboratory Testing Mechanical and adhesive properties o 3- & 4- point bending o Flat-wise tensile (20° &80° C) Օ Non Destructive Testing Watertightness Օ Further testing 11/20 © -xm hjro composas

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table.main {} tr.row {} td.cell {} div.block {} div.paragraph {} .font0 { font:19.00pt "Arial", sans-serif; } .font1 { font:16.00pt "Franklin Gothic Medium", sans-serif; } .font2 { font:21.00pt "Franklin Gothic Medium", sans-serif; } .font3 { font:30.00pt "Franklin Gothic Medium", sans-serif; } .font4 { font:40.00pt "Franklin Gothic Medium", sans-serif; } EC-HLM: Mechanical properties Mechanical Testing Test samples have been eut from two panels sized 1000 x 1200 mm Resin: RTM6 [Hexcel structural epoxy resin, qualified for aerospace applications) Fabric: Carbon G926 6 Loyers on each side (0°...

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