摘要 |
Composite is placed in the mold recess. Molding pressure is exerted, starting initially at Pi, and ending at Pf. Pressure forces out air trapped during placement, and any initial volatile occlusions. The shape of the mold, temporal profile of pressure application and manner of heating, convert the composite to the desired state and shape of molding. An Independent claim is included for the corresponding molding equipment. Preferred features: The mold (1) is closed under pressure against resilience (12), and is locked. The temporal pressure profile exerted by components (4,8,11,12,13,16) is selected from a data base resulting from testing of known materials at given temperatures. Application of heat takes place at less than 10 degrees C per minute, preferably below 2 degrees C per minute. The composite comprises e.g. PREPRIP (RTM; prepregs comprising resin-impregnated reinforcement).
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