Infusion
Absolute vacuum gauge
The following is an excerpt from Issue 12 of The Composites Letter, published by www.vacmobiles.com (reposted here by permission) that outlines the importance of using an absolute vacuum gauge to measure pressure levels during double-bad infusion:“Often called a precision vacuum gauge, an absolute gauge actually works the opposite way to a conventional dial type vacuum gauge.
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Double-bag infusion: 70% fiber volume?
A double vacuum-bag system and tight process control enable repeatable fiber volumes of 60 to 70 percent and improves consistency of infused laminates.
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Besting Big Ben: A Marvel in Makkah
Composite design makes possible the world’s largest clock and tallest clock tower.
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Third-party tests support claims for crosslinking spray adhesive
Aerospace manufacturers that adopt vacuum infusion processes are discovering what processors of boat hulls and wind turbine blades already know: Placement of multiple plies of slippery dry fiber reinforcements in molds with vertical sides or tight radii is problematic.
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A400M cargo door: Out of the autoclave
This structural military airframe part is the largest made to date via the vacuum-assisted resin infusion process.
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DDG-1000 Zumwalt: Stealth warship
U.S. Navy navigates radar transparency, cost and weight challenges with composite superstructure design.
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New infusion regime for superthick laminates
 Innovative initiator chemistry yields long flow time, cure on demand and exotherm control for large, thick parts.
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Team-built bus body bests all
OEM meets tight development schedule on superlight multipart molded shell to offset propulsion system weight in fuel cell-powered transit bus.
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Cost- and time-saving preform process used for propeller spinner
Carbon fiber/epoxy spinner uses pulp slurry preforming process combined with vacuum infusion molding.
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Inside R and D: A-VaRTM takes flight in Japan
Tests show out-of-autoclave process can reduce costs on new regional jet.
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