Abstract The paper presents a complete description of the design and manufacturing of a Carbon Fiber/epoxy mold with an embedded Carbon Fiber resistor heater, and the mold performances in terms of its surface temperature distribution and thermal deformations resulting from the heating. The mold was designed for manufacturing aileron skins from Vacuum Bag Only prepreg cured at 135°C. The glass transition temperature of the used resin-hardener system was about 175°C. To ensure homogenous temperature of the mold working surface in the course of curing, the Carbon Fiber heater was embedded in a layer of a highly heat-conductive cristobalite/epoxy composite, forming the core of the mold shell. Because the cristobalite/epoxy composite displayed much higher thermal expansion than CF/epoxy did, thermal stresses could arise due to this discrepancy in the course of heating.
This specification covers an aluminum alloy in the form of bars and rods 0.500 in. (12.50 mm) and over in nominal diameter or least distance between parallel sides.
This specification covers an aluminum alloy in the form of bars and rods 0.500 inch (12.7 mm) to 8.000 inches (203.2 mm) in nominal diameter or least difference between parallel sides and up to 50 square inches (322.6 square centimeters) in cross-sectional area (see 8.7).
This specification covers an electrically-conductive adhesive supplied as two components; a paste of silver-filled, epoxy-base adhesive and a separate curing agent which may be paste or liquid.
This specification covers an electrically-conductive adhesive supplied as two components; a paste of silver-filled, epoxy-base adhesive and a separate curing agent which may be paste or liquid.
This specification covers a single-component, unfilled, heat-reactive, thermosetting, aromatic system which thermally cures to form a polyimide polymer structure.