Composite Manufacturing - Filament Winding
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In a filament winding process for composite manufacturing, a band of continuous resin impregnated fiberous material, rovings or monofilaments is wrapped around a rotating mandrel and then cured either at room temperature, in an oven or in an autoclave to produce the final product.
The filament winding technique offers high speed and precise method for placing many composite layers. The mandrel can be cylindrical, round or any shape that allows the windings to be placed on the outer surface.
Among the applications of filament winding are cylindrical and spherical pressure vessels, missile casings, pipe lines, oxygen & other gas cylinders, rocket motor casings, helicopter blades, large underground storage tanks (for gasoline, oil, salts, acids, alkalies, water etc.).
The process is not limited to axis-symmetric structures: prismatic shapes and more complex parts such as tee-joints, elbows may be wound on machines equipped with the appropriate number of degrees of freedom.
Modern winding machines are numerically controlled with higher degrees of freedom for laying exact number of layers of reinforcement. Mechanical strength of the filament wound parts not only depends on composition of component material but also on process parameters like winding angle, fibre tension, resin chemistry and curing cycle.
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