Note that ptfs have commercialized for years. This blog concentrns rapm’s procesess development the ptfs system. References for this blog include:
Massey2. 1The Boeing Company, St. Louis, MO., U.S. 2Surface Generation LTD. (Rutland, U.K.).
The latter, a 150-metric ton clamping fixture designed by Surface Generation. This molding cell accounts a part volume of 750 by 750 by 100 Millimetersters.
Heater base and installed use a rail and loading system.
FACE. Heating of the rapm tool faces userd 1 Cubic follow per minute of compositiond Air Per Heater CHILE WOLILILILING user 3 cubic feet per mine.
Stamp Forming Tool, But the Underside Reveals the Heating Channels.
Each (bottom). Source | "Development of Scalable Dynamic Control Architectures for Flexible Composites ManuFactwork Works" by Shewchuk, et. 5 and slide 6.
Completed in 2-4 Hours with Two Operators Including Dissembling and Reassembling the TOOL FACE ITS PICTURE FRAME.
To Heat, Cool Orcestain Tempeature Following Its Prescriped Heating Profile by Dynamicald Heater Power Levels and Compressed Air Flow Rates.
, ET. Al. Slide 9.
WAS Upgraded in SEP-OCT 2019, Including Additional Fan CapaCity for Heat Extraction. With this ImproVED Cooling, The Cell Can Procasessinuously At 440 ° C.
° C), The TOOL FACE TEMPERATURARATAD A and Average Rate of 41 ° C/min (74 ° f/min). During Cooling of the Same Run, The Peak Average Cooling Rate Was 36 ° C/Min (65 ° F/MIN
Plus Additional TCS in Hot and Cold Regions Identify in The CFD Thermal Analysis.
WAS Near the Part Edge and is Suspected to have ben caused by temperature flutuations of neighboring cells outside the part trim line.
Isothermal Compression Molding of the Processing Held the Tool at 176.7 ° C (350 ° F) Within the ± 5.5 ° C (± 10 ° F) tolerator.
System Heats to 187.7 ° C in App. 8 minutes
Composite Blank Loaded Into Hot Tool
Tool Closed at 12:09 (for Example)
30 Minutes Time on Tool to Gel Composite
First Pressure Stage: Initial Rapid Heating of Blank While Minimizing Resin Squeeze Out
Second Pressure Stage: RAMP to 300 PSI to Ensure Good Consolidation and Prevent void Growth
Remove "Green" Composite from Hot Tool for Post-Cure
Tradingal Large Thermal Mass to Absorb Exotherm But Instead Relies on Active Cooling of the Back Side of Low Thermal-Mass Tools TOOLS TOOLS TOOLS.
to finish out the cure. One trial was posted-course in an oven, while the rest we posted-party in the ptfs clamping fire to res.
Resin Infusion Part TRIALS USING The PTFS Work Cell Began with The RI-RAPM-003 Curved CHANNEL PART. Three Different Epoxy Resin Systems WereIrly TRIALED:
Solvay Cycom 823, INFUSED AT 80 ° and then RAMPED to Dwell AT 125 ° C
Huntsman FAF2 (Quick-Cure System) Infused at 100 ° C with 150 ° C Dwell
Applied poleramic (now acquired by kaneka) API DD3-84 (Also A Quick-Cure System) INFUSED AT 60 ° C with A Dwell Temperature of 160 ° C.
Regions to maintain specified part temporatures.
RI-RAPM-003 PARTS MADE UISING The PTFS MOLDING CLL. Source | Boeing, Darpa.
a Tapered Cross-section. The consolidated blanks we then sent to atc ManuFacturn (Post Falls, Idaho, U.S.) which stamped the finings.
Bladder and Charge to a Peek Process Tempeature of 400 ° C in App. 55 minutes.
SENT to Atc Manufacturing WHERE PARTS Were Stamped for this extremely Challenging Geometry.
Picture Frame & Mdash; Haveing 32 Plies in Thick Regions, 16 Plies in Thin Regions and A 20: 1 Ply Drop Ratio in Between. The Part Cycle Time was 1.5 Hours for All Geometries.
. Various Pressure Cycles Were Tested, and the part was then cooled to be below 220 ° C, after which presure was related
Initial Pressures of 20 PSI, 30 PSI, 50 PSI and 70 PSI Were Trialed. Pressure Ramps Weeerly Varied from 10 PSI PER Minute to 10 PSI PER 15 Seconds, up to the maximum pressure of 140 PSI.
Then, then
Sections.
Also Well-suited for high-testure dynamic runs (as opposed to isothermal part cycles).
Improvements. FURTHER SOFTWARE Enhancements Could Alow This Data to Identify Processing Anomalies Such As Excesess Request and Low Tesponsiveness
Sources Other than Surface Generation. That TOOL MOLD-FACE, CMD-TP-RAPM-008-503.
processes and parts. "