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4. To find the ramp up rate we will need the Target Temperature (a°) - Ambient Temperature (t°) = (e°) ÷ 3° = (r) minutes to ramp up to the target temperature. 5. Once you have reached your target temperature (250°F) you may start the cure time or soak time. 6. Once your cure time has been complete you may start ramping down your temperature. You will need to ramp down 3 degrees a minute. When you have reached 130°F you may remove your part from the oven and debag your part. Debagging 1. When debagging your part you will need to remove the vacuum probes. To prevent misplacing or throwing away your probe bases cut the vacuum bagging film around the vacuum probe and set the probes to the side. 2. Now cut around the inside perimeter of the sealant tape on the vacuum bag. 3. Remove the vacuum bag and peel back each layer one by one. (Breather cloth, solid parting film, etc.) 4. When removing the part from the tool be aware that there is resin flashing on the edges of the part. This resin flashing is very sharp and can cause injury. (To avoid injury use masking tape and tape the edges or use sand paper and start deburring the edge.) 5. Your part is now ready to be trimmed and sanded. Trimming and Sanding Rev A1 Pacific Coast Composites | sales@pccomposites.com | 1.888.535.1810 | www.pccomposites.com © 2017 1. 2. 3. 4. 5. It is always good to have a final trim template for any composite part. You can use a piece of wood, aluminum, and even a piece of paper. The sandwich panel must be trimmed down to 8” wide x 10” long. When tracing out your part tape off the area that is going to be traced with masking tape. (A color tex pencil can be used to avoid using masking tape.) The masking tape helps prevent fiber breakout. You can now start trimming your part using a tile saw or band saw. Once you have trimmed your part you will need to sand the edges and round the corners. Use a 150 grit sand paper when sanding your part. When sanding on the edges do not sand against the fibers; sand with the fibers. (Sanding against the fibers can cause the part to delaminate.) Example: Cure at 260°F±10° for 90 minutes. 260°-68°=192° ÷ 3° = 64 minutes to ramp up to 260°F 7 How-to Manufacture a Composite I-BeamPDF Image | Sandwich Panel
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