High rate production bladder molding of composite parts for the mountain bike industry for over 15 years
In Bladder Molding, impregnated sheets of fiber (either "pre-preg" or "wet" laminate) are wrapped around an inflatable bladder and then placed inside a mold cavity. Once the mold is closed, pressure is applied to the inside of the bladder pushing the sheets of fiber out against the inside walls of the mold. Heat is then applied to the mold to solidify (cure) the sheets of fiber in the shape of the inside of the mold. Once the part is solidified, the bladder is deflated, the mold is then opened for part removal and the bladder is removed (in most cases) from the inside of the final part.