Rotational Molding

Rotational Molding

Primary benefits include:
- High-quality appearance
- Stress-free parts
- Lower tooling costs than other molding processes
- Quick to market
- Small to very large parts
- Secondary Machining is available to produce tighter tolerances

Rotational molding, also known as rotomolding, is a plastic molding process that uses rotation and gravity, rather than pressure, to mold parts and components. The molds are heated while being rotated on two perpendicular axes. This disperses the material and fills the mold.

The parts produced are hollow and the wall thicknesses can vary throughout the part from 0.100” to 0.320”

The process offers numerous design possibilities. Complex geometries can be created. This versatility means products that previously required many components can be made with fewer parts using rotational molding.

Rotomolding has many benefits. The hollow parts can be filled with a plastic foam for greater strength and buoyancy. Molded-in inserts can be used. Plus many other secondary operations can be used for added value.

Because no pressure is used, the molds are less complex than injection molding tools. Plus, molds can often be made with less expensive materials such as cast aluminum. Together these save on tooling costs and lead times.

Rotational molding is used for a wide range of parts and in a variety of industries. Small to very large parts can be molded. The process produces attractive surface finishes with excellent detail.