What is Rotational Molding?

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Rotational Molding is used to make hollow parts. Powder or liquid resin is put in a hollow mold then heated and rotated so that the resin melts evenly and coats the inside of the cavity.

Here’s a quick overview of the details and requirements we use to guide our decision making for rotational molding use during product development.

Accuracy: ± 10% of wall thickness

Repeatability: Yes, 1 or a few molds for multiple parts

Material: Polymers and Thermoplastics

Volume of Parts: High volume

Finishing Types: High gloss to detailed texture

Form Requirements: Uniform wall thickness, any colour, as low as 0.5 mm thick, with radii 5x greater than wall thickness

Size/Weight: Small to very large

Assembly Features: Metal inserts or threaded inserts

Lead Time: 4-10 weeks

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Image: Examples of Rotational Molding Products
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