Development of the technology of partial solidification of thin-walled shells when creating designs from polymeric composite materials

The article focuses on the creation of dimensionally stable integrated thin-walled structures made of polymer composite materials by the binder partially cross-linking. The relevance of the work lies in the increased requirements for aerospace structures: an increase in structural strength and reduce its weight. A partial cross-linking method allows you to create integrated design with a low weight due to lack of mechanical fasteners. The partial cross-linking method allows you to create integrated design with high strength, stiffness and dimensional stability due to lack of additional materials besides matrix and reinforcement. It allows to get the principle of continuity of the final material. The additional advantage of the partial cross-linking method is molding structure in one process cycle. This article describes the current state of the partial cross-linking manufacturing technology and research results identified previous work. We analyzed the curing step of the hot temperature polymer binder and determined optimal parameters of cure for solve the problem about maximum adhesion between two part of integrated structure and minimal cycle time for organize of serial production. In this article we have shown a mold construction for production composite material by RTM with the partial cross-linking method and heat exchanger construction to heat extraction from partial cross-linking area. We conducted a thermal design for different heat exchanger construction and we chose the best construction for this case. We produced the mold for resin transfer molding and we get a sample of material with partial cross-linked area.