System and method for forming a composite part
A method of forming a composite part may include positioning composite layers onto a part-supporting surface of a support tool. The composite layers combine to form the composite part. The method may also include covering the composite part on the support tool with a vacuum bag, and forming a heat transfer assembly on the vacuum bag in relation to a portion of the composite part. The method may include forming the heat transfer assembly on the vacuum bag by depositing a fluid layer of material onto the vacuum bag, inserting heat transfer promoters into the fluid, and cooling the fluid to form a solid heat transfer assembly.
1. A system for forming a composite part, the system comprising:
a support tool including a part-supporting surface;
a composite part supported on the part-supporting surface;
a vacuum bag positioned over the composite part on the part-supporting surface; and
a heat transfer assembly coupled to an outer surface of the vacuum bag, wherein the heat transfer assembly comprises:
a heat transfer base deposited as a liquid layer of metal onto the outer surface of the vacuum bag; and
one or more heat transfer promoters inserted into the liquid layer of metal and extending outwardly from a cooled and solidified portion of the heat transfer base.
2. The system of claim 1 , wherein the metal exhibits a thermal conductivity in the range of 30-300 W/mK in a solid phase, and has a melting point between 365° F. and 400° F.
3. The system of claim 1 , wherein each of the one or more heat transfer promoters is shaped as one or more of a panel, a plate, a pin, a post, a spike, or an irregular shape.
4. The system of claim 1 , wherein the one or more heat transfer promoters comprises a plurality of heat transfer promoters separated by air channels.
5. A heat transfer assembly configured to be coupled to an outer surface of a vacuum bag that is positioned over a composite part supported on a part-supporting surface of a support tool, the heat transfer assembly comprising:
a heat transfer base configured to be mounted on the outer surface of the vacuum bag, wherein the heat transfer base is formed by depositing a liquid layer of metal onto the outer surface; and
a plurality of heat transfer promoters extending outwardly from the heat transfer base, wherein the plurality of heat transfer promoters are inserted into the liquid layer of metal, and wherein the liquid layer cools and solidifies to secure the plurality of heat transfer promoters in position.
6. The system of claim 5 , wherein the metal exhibits a thermal conductivity in the range of 30-300 W/mK in a solid phase, and has a melting point between 365° F. and 400° F.
7. The system of claim 1 , wherein at least portions of the one or more heat transfer promoters are uncovered and exposed.
8. The system of claim 1 , further comprising a release coating disposed between the vacuum bag and the heat transfer assembly.
9. The system of claim 1 , further comprising:
a porous edge breather around an outer periphery of the composite part, wherein the porous edge breather is configured to allow air to pass from the composite part and out through a vacuum line formed through the vacuum bag;
a parting film formed over the composite part and the edge breather;
a surface breather positioned between the parting film and the vacuum bag, wherein the surface breather is configured to allow air to pass from the composite part and out through the vacuum line;
an edge sealant that provides a sealing layer between the part-supporting surface of the support tool and a peripheral edge of the vacuum bag.