Composite molding apparatus and method for concurrent high pressure molding and curing of low-weight hollow core composite articles, which have inclined faces, using low density stabilized inclined hollow core cores, and product formed in this way

摘要

Invention Patent: B "COMPOSITE AND METHOD MODELING APPLIANCE FOR MOLDING AND CURING CONCURRENT TO HIGH PRESSURE OF LOW WEIGHT ALVEOLAR CORE ARTICLES, WHICH HAVE INCLINED FACES, USING ALCLINED ALTEOLAR NUCLEARS, INCLUDED ALLEOLAR NILLEES. IN THIS FORM "D. A composite molding apparatus (10) and a method for molding with concurrent high-pressure curing of low-weight honeycomb core composite articles that have inclined surfaces using low-density stabilized inclined honeycomb cores. The low total density stabilized inclined honeycomb core is formed through the final conformation of the material with stabilized honeycomb core in an inclined honeycomb core, which is for concurrent storage and curing by applying a layer of adhesive on low surface weight film to sloping top and bottom surfaces. The honeycomb core material is stabilized for the final forming operation by means of a layer of low surface weight film adhesive applied to the upper and lower surfaces of the material in a predetermined frame format. The composite molding apparatus is a semi-rigid molding assembly that includes a rigid base element (12) and a complementary semi-rigid mold element (20), which includes rigid internal reinforcement inserts (22) that provide a symmetrical pressure distribution over the inclined surfaces of the alveolar core and overlapping composite prepregs, during the process with concurrent curing and high pressure. The composite prepregs and the inclined honeycomb core are placed in the semi-rigid molding assembly, which is vacuum packed and autoclaved. The vacuum package is emptied, and the molding set is subjected to a temperature cycle, two-stage pressure for concurrent curing at high pressure. The autoclave is pressurized to a contact pressure, and the temperature is then raised from ambient to a contact temperature, whereby the autoclave is stabilized for a period of contact. Then, the autoclave pressure is increased to a high pressure, and the temperature is raised to a concurrent curing temperature, whereby the autoclave is stabilized for a concurrent curing period, to effect storage curing. After curing is completed, the autoclave is cooled and then depressurized to remove the composite molding apparatus.