Title: ENHANCING PART DEMOLDING CHARACTERISTICS OF ADDITIVELY MANUFACTURED FIBER-REINFORCED POLYMER COMPOSITE TOOLS VIA SURFACE COATING
Authors: Garam Kim, Eduardo Barocio
Abstract: The influence of a surface coating on the demolding characteristics of an additively manufactured fiber-reinforced polymer composite tool was investigated. An experimental setup was developed to measure the reaction force developed as a part was demolded from an additively manufactured tool. The tool used in the demolding experiments consisted of a cylindrical geometry and was additively manufactured with 50% by weight of carbon fiber reinforced polyphenylene sulfide (PPS). A commercial thermoset-based liquid coating was applied, and a composite laminate was laid on the surface of the tool and cured in an autoclave process. The force was recorded as a function of the displacement during the part demolding process of both the coated and non-coated tools. The demolding test results showed that the initial force required to demold the part and the kinetic friction coefficient between the tool and the part decreased substantially with the application of the coating. Further, the stick-slip behavior developed during the demolding process of the part was significantly reduced with the coating. Stereoscopic images of the tool surface revealed that the coating filled voids initially present at the surface of the tool, thereby producing a smoother and more homogenous surface texture than the non-coated tool.
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Conference: SAMPE 2023
Publication Date: 2023/04/17
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