Module 4: Composites Manufacturing Processes

Open Molding Correct Answers A fabrication process where the composite materials are exposed to the atmosphere Closed Molding Correct Answers A fabrication process where the composite materials are processed in a two sided mold set or within a vacuum bag Hand Lay-Up Correct Answers An open molding process where the reinforcement is placed manually Spray-up (Chopping) Correct Answers An open molding process where the resin and glass fiber are deposited using a chopper gun Gel Coat Correct Answers An in mold coating sprayed on the surface of the mold Uncontrolled spraying Correct Answers No specific spray gun pressure calibration, no mold containment flanges, no specific operator training. This method produces higher styrene emissions. Controlled spraying Correct Answers A procedural program that involves spray gun pressure calibration, the use of mold containment flanges and specific operator training. This method significantly reduces styrene emissions and reduces the cost of waste. The ACMA Controlled Spraying Handbook details the methods and requirements of this application method. Non-atomized applicaiton Correct Answers Includes non-atomized flow coaters, pressure fed rollers, or other non-spray application Prepreg Correct Answers A pre-impregnated reinforcement fabric used for many advanced composite applications Vacuum Infusion Processing (VIP) Correct Answers Denotes any process where vacuum pressure is applied to a mold cavity utilizing atmospheric pressure to push resin into the cavity