초록 ▼

A method for making a fiber reinforced composite article includes placing in a forming mold article cavity a preform which includes at least a fiber reinforcement arrangement, such as stacked piles of resin bonded sheets. Closure of the mold defines a matrix reservoir for excess matrix material in f

A method for making a fiber reinforced composite article includes placing in a forming mold article cavity a preform which includes at least a fiber reinforcement arrangement, such as stacked piles of resin bonded sheets. Closure of the mold defines a matrix reservoir for excess matrix material in fluid flow relationship with the article cavity. Gas pressure applied to the excess matrix material while in the fluid condition forces that material back into the article cavity to nominally eliminate voids, pores and other internal and surface discontinuities from the article.

대표청구항 ▼

In the method for making a fiber reinforced composite article, including placing within a mold, a plurality of plies stacked in preselected order to make a preform, each ply having fibers embedded in a heat flowable matrix material; and closing the mold portions to define an article cavity about the

In the method for making a fiber reinforced composite article, including placing within a mold, a plurality of plies stacked in preselected order to make a preform, each ply having fibers embedded in a heat flowable matrix material; and closing the mold portions to define an article cavity about the preform; the subsequent steps of: at the pressure existing in the article cavity about the preform upon closing the mold, heating the preform to a temperature selected to fluidize the matrix material in the preform and to flow the matrix material within and about the article cavity and the preform fibers, while maintaining the article cavity, to generally fill the article cavity, and to flow excess fluid preform matrix material from within the article cavity outside of the article cavity and in fluid flow relationship with the article cavity; while maintaining the matrix material fluid through heating, applying a gas back pressure to the excess fluid matrix material to force the excess fluid matrix material back into the article cavity and thereby to pressurize the article cavity through the excess fluid matrix material; and then, maintaining the gas pressure to pressurize the article cavity while solidifying the matrix material.