Rotational Molding of Plastics
Rotational molding, also known as rotomoulding, is a process used to create hollow plastic parts. The process begins by loading a mold with a charge of product and then placing the mold into an oven where it turns gradually, causing the softened material to distribute and adhere to the wall surfaces of the mold. This creates a hollow component with even wall thickness throughout. To ensure a uniform wall thickness, the mold turns at all times during the heating or cook cycle/phase, and then remains to turn during the cooling phase. Once the cooking and cooking cycles are complete, the mold returns to the unload station where oven operators will open the mold up, remove the molded product and re-charge the mold with a loaded shot weight of material and start the rotomolding process all over again!
Custom Rotational Molding
Custom Rotational Molding is a specialized process dedicated to quality custom rotomolding for OEMs and other manufacturers, who have a specific set of requirements. While many rotomolding companies only manufacture a certain type of product, such as trash cans, laundry carts, tanks or playground equipment, some leading rotational molding companies offer a strict focus on quality and specialize in custom rotational molding.
A rotomolding company with a focus on custom rotomolding will have in-house engineers to guide potential customers thru the design process, ensuring that as many desired features and functions can be successfully incorporated into the design of the product and the product is capable of being mass produced. Once the design is complete and finalized, a mold shop for rotomolding can begin the process of creating the necessary molds to produce the rotationally molded components.
Alli explains the Custom Rotational Molding Process
Granger Divisions
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