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Low cost tooling material and process for graphite and Kevlar compositesAn Extruded Sheet Tooling Compound (ESTC) was developed for use in quickly building low cost molds for fabricating composites. The ESTC is a very highly mineral-filled resin system formed into a 6 mm thick sheet. The sheet is laid on the pattern, vacuum (bag) is applied to remove air from the pattern surface, and the assembly is heat cured. The formed ESTC is then backed and/or framed and ready for use. The cured ESTC exhibits low coefficient of thermal expansion and maintains strength at temperatures of 180 to 200 C. Tools were made and used successfully for: Compression molding of high strength epoxy sheet molding compound, stamping of aluminum, resin transfer molding of polyester, and liquid resin molding of polyester. Several variations of ESTC can be made for specific requirements. Higher thermal conductivity can be achieved by using an aluminum particle filler. Room temperature gel is possible to allow use of foam patterns.
Document ID
19900008518
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Childs, William I. (Quantum Composites, Inc. Midland, MI, United States)
Date Acquired
September 6, 2013
Publication Date
June 1, 1987
Subject Category
Composite Materials
Report/Patent Number
H-1407
NAS 1.26:179427
NASA-CR-179427
Accession Number
90N17834
Funding Number(s)
PROJECT: RTOP 324-02-07
CONTRACT_GRANT: SBIR-04.03-7789
CONTRACT_GRANT: NAS2-12016
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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