NDLI: Investigation of a Two-Stage Injection Process to Reduce the Effects of In-Plane Resin Flow

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Investigation of a Two-Stage Injection Process to Reduce the Effects of In-Plane Resin Flow

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Larsen, Erik Cairns, Douglas Mandell, John Samborsky, Daniel
Copyright Year	2002
Abstract	This paper is a discussion of a manufacturing technique that reduces dependency on in-plane resin flow, allowing greatly reduced injection times, increased injected resin volume per port (reducing the number of ports required), and allows relatively higher fiber volume content. This method uses a two-stage injection process. The first stage injects resin into a vacuum evacuated “pool” outside of the plane of the fabric. Pressure is then applied outside of a flexible film, forcing resin into the fabric in the thickness direction. Since resin is not required to flow in the plane of the fabric, relatively high volumetric flow rates are possible during the injection stage. The hydrostatic pressure on the flexible film results in part-to-part and spatially consistent high volume content. This process has also shown to be less sensitive to fabric and manufacturing inconsistencies than traditional two-sided mold RTM, and has been used to successfully manufacture parts using difficult-to-RTM materials such as bonded fabrics. Drawbacks of this process include increased mold and process complexities, poor surface finish on one side of the part, and increased complexity of process tuning.
Starting Page	40
Ending Page	46
Page Count	7
File Format	PDF
ISBN	156347476X
DOI	10.1115/WIND2002-26
Conference Proceedings	ASME 2002 Wind Energy Symposium
Language	English
Publisher Date	2002-01-14
Publisher Place	Reno, Nevada, USA
Access Restriction	Subscribed
Subject Keyword	Finishes Gates (closures) Vacuum Hydrostatic pressure Manufacturing Resins Flow (dynamics) Pressure Textiles Fibers
Content Type	Text
Resource Type	Article

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