Five Benefits of Rotational Molding

benefits of rotational molding | reinforcing ribs
benefits of rotational molding | reinforcing ribs

Rotational molding produces strong, hollow plastic parts in a wide variety of shapes, sizes, colors, and textures. It also supports undercuts, multiple walls, and molded-in hardware and graphics. The benefits of rotational molding are many, as a new YouTube video from ARMO explains. The Affiliation of Rotational Moulding Organisations, a U.K.-based organization with international affiliates, outlines five rotomolding benefits that part and product designers, engineers, and manufacturers need to know.

#1 Easy-to-produce molds

The molds used in rotational molding are relatively easy-to-produce for shorter lead times and faster times to market. They can range from simple, two-piece sheet metal molds to metal molds with articulating features. Compared to many injection molds, rotational molds cost less to produce.

#2 Greater design freedom

Many rotomolded shapes are impossible to mold by other methods. Rotomolding is also flexible enough for projects ranging from small, intricate designs to large, complex parts and assemblies. Parts with hollow cavities can be produced that support polyurethane foam filling.

#3 Custom colors and textures

Rotational molding supports color matching and eliminates parts painting. Blenders that “polish” the resin provide uniform colors and improved overall physical properties. During the rotomolding process, decorative effects such as textured or engraved surfaces can be molded directly into the plastic part.

#4 Molded-In Part Features and Hardware

Rotational molding can also mold-in threads, spouts, bosses, recesses, and metal inserts. It supports value-added manufacturing too. As this featured project shows, Gregstrom assembled a finished display from 40 off-the-shelf hardware components, five custom-fabricated parts, and five rotomolded parts.

#5 Permanent Graphics

Plastic parts that are rotomolded can feature Mold In Graphics, a permanent way to mark, decorate, brand, or label plastic products. Mold In Graphics provide a reliable alternative to traditional stickers, which may not adhere well to plastics and can peel-off over time.

Discover More Benefits of Rotational Molding

Would you like to learn more about the benefits of rotational molding? Gregstrom Corporation, a value-added rotational molder in Woburn, Massachusetts (USA), is a family-owned, third-generation business with over 70 years of experience. Contact us to learn how we can help you.