Forming railway vehicle, etc by applying fiber reinforced skin to mandrel, then fitting framework of foam cells and applying another layer of fibers and resin over framework

摘要

Forming a composite structure includes attaching panels made of open cell foam or similar between posts of a framework made from two half frames. A first skin is made from fabric deposited on a mandrel. The skin includes longitudinal reinforcement fibers and resin The framework is placed over the skin on the mandrel. A second skin of fibers and resin is deposited on the framework. The structure is heat cured, its ends are cut off and the mandrel withdrawn. An Independent claim is included for the following: (a) Equipment for performing the above method includes devices for rotating a generally cylindrical mandrel and depositing the fibers and resin forming the two skins. Preferred Features: The device depositing the fibers and resin of the second skin moves along and around the mandrel. The device depositing the fabric forming the first skin has rollers contacting the surface of the mandrel for folding the deposited fabric. The rollers are mounted so they can move parallel to the axis of the mandrel. The resin is either impregnated into the fibers or applied after the associated fibers have been deposited.