Why Rotational Molding? | Small to Large | Simple or Sophisticated


ISO 9001 2015
ISO 14001 2015

What is Rotomolding? - And how my parts will benfit from Rotational Molding

Uniform wall thickness:

Bi-axial rotation ensures the mold walls are evenly coated. The uniformity of rotomolded wall thicknesses can be maintained within ±10 percent –significantly better than other molding processes.

Durable, Strong, and Stable:

One-piece molding eliminates any need for joining techniques; increasing durability; Plastic doesn’t rust, is resistant to corrosion, increasing durability; Wall variation can be designed into the mold to create stronger parts due to thicker outer corners or other features; Can be designed with a double-wall construction for strength or urethane foam filling for additional strength or insulation; The absence of external pressure produces nearly stress-free parts, reducing the risk of defects enhancing product stability; Minimal cross-section deformation or warpage.

Low-cost tooling:

The rotomolding process features relatively low operating pressure, allowing for softer, lower-cost metals to be used, ranging from cast aluminum to fabricated steel sheet

Quick Startup:

Myers offers unmatched speed and efficiency that allows you to significantly increase production with decreased lead times so you can meet demand and maintain inventory stress-free. Tooling for rotomolding can be completed faster than other molding processes, so you can start making and shipping your parts faster, even if they’re new or converted from another method.


Hollow parts, enclosed pieces, and parts with openings can all be achieved through rotomolding.

  • Rotomolding design flexibility allows for complex geometries in a single seamless part.
  • If you can imagine it, you can design and produce it with rotomolding, even with foam or metal inserts, dividers or handles, mold-in graphics, reinforcing ribbing, kiss-off ribbing, undercuts, or separate colors.
  • Multiple-piece tooling enables one-piece design freedom of complex shaped parts for the elimination of post-molding assembly.
  • Small or large, simple or sophisticated, The sky’s the limit.

Less Waste, Environmentally Friendly:

Rotomolding has a minimal environmental impact. Any waste generated through scrap or product testing can be recycled. Plus, no toxic or hazardous materials are ever emitted during production.

Lower Production & Material Costs:

Multiple parts can be molded as one and finished as several, reducing both part and tooling costs.

  • The family of molds makes high-volume production of parts cost-effective.
  • It can eliminate the need for secondary assembly.

Usage Versatility:

Rotomolded products can meet FDA requirements, withstand severe weather, be flame retardant, and/or handle storing strong chemicals and other materials.

High-Quality Surfaces Finishes and detail:

The soft metal used for the rotomold tooling easily accommodates surface finishes such as fine-detail. Textures, logos, symbols, and lettering. Make it fancy with high-gloss or textured surfaces, whatever you want. Your part will be strong but light, so you avoid the heavy lifting and expensive shipping of other processes.

Rotational Molding tools on an arm. The tools are attached to a grate

Biggest Advantages of Rotational Molding

Rotomolded parts can have sharp graphics, bright colors, strong corners, and foam fill for insulation or stiffness, and they are always free of weld lines and pinch-off seams. From huge fuel tanks to rugged coolers, you can enjoy these advantages of Rotational Molding.