Rotational molding is an economical process
Rotomolding is used to form large or small hollow shapes using powdered plastic. The resulting parts are seamless, one-piece, virtually stress-free and complex in design. They may have metal inserts molded into them, graphics molded onto the outside or foam in the wall. With rotational molding, lead times are quick; tooling is low cost and part complexity is easy to accomplish.

Stage 1: Pigments are blended with the plastic in high intensity mixer. This provides excellent dispersion for consistent coloring throughout the part, and produces a product with higher impact resistance than traditional methods of mixing.

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Stage 2: At the Loading Station, the mold is inspected, then charged with the correct amount of material and sealed, ready to enter the oven.

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Stage 3: The mold rotates on both axes as it enters the oven. This bi-axial rotation allows the material to evenly cover the inside of the mold. As heat penetrates the mold, plastic starts to coat the interior. When all the plastic charge has evenly coated the mold, it is removed from the oven.With the heating process complete, the mold is moved into the cooling chamber. Here a computer-controlled combination of water mist and forced ambient air slowly brings down the temperature allowing the plastic to solidify. When the plastic is cool enough the mold can be removed from the cooler.

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Stage 4: The mold is moved from the cooler to the Loading Station, opened up and the plastic part removed. At this point, it gets its first of many quality checks.

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