A method of forming parts from polymeric composite materials using double vacuum bags

摘要

A method of forming parts of PCM using vacuum impregnation with a double vacuum package, including laying of the preform on the tooling with a further airtight packaging to the internal vacuum bag and install highways receiving and filing binder tight fixing the outer vacuum bag to snap, creating and maintaining a vacuum at an internal and outer vacuum bags, and impregnating the preform molding parts, cooling equipment, vacuum bags dismantling and recovering the formed part, characterized in that the vacuum level under the outer vacuum bag the preform during impregnation binder set from -0.5 to -0.90 bar, and the level of vacuum under internal vacuum support package is not lower than -0.98 bar, while the temperature during impregnation tooling smoothly increased to provide a constant viscosity of the binder, the impregnation process after the first cover receiving inner bag vacuum line and delivery line binder cover after motion stops binder in tube outer binder supply line, after which the vacuum level under the outer package is increased to a level not lower than -0.98 bar, moreover, the process of gelation of the binder is carried out at a temperature lower than the temperature of the final cure of the binder.