Composiflex: Advanced Composite Products
Celebrating 30 Years 1986 - 2015

Filament Winding process

Process Description

Composite raw materials are wound onto a rotating mandrel.  The wind angle is controlled by the back and forth movement of a carriage that is synchronized with the revolution speed of the mandrel.  Mandrels are typically cylindrical, although other shapes can be used.  Options for composite raw material include fiber tows that are immersed in a resin bath, pre-preg tape, and others.  Computer control and special software are used to control wind angle during the manufacturing process.  Management of fiber tension is important to determine fiber volume fraction, void content, and other properties.

Typical Applications

Pipes, tubes, shafts, vessels, tanks and other hollow parts.

Filament Winding

Filament Winding Advantages

  • Low labor process
  • Precise control of fiber angle
  • Various ways to control resin content

Filament Winding Disadvantages

  • Difficult to place fibers along the length of the part
  • Often requires specialized equipment to extract parts from mandrel
  • Use limited to tubular and other simple hollow shapes
  • Difficult to maintain pressure on non-cylindrical shapes
  • Tooling for long parts can be high