Gregstrom Corporation is a Made in USA manufacturer of rotomolded coolers that keep food and drinks cold for extended periods of time. Rotational molding, a plastics manufacturing process, creates durable products with a uniform wall thickness for strength and insulation. Rotomolding also supports molded-in features and enables design flexibility.
Keep reading to learn more and contact Gregstrom if you’re looking for a Made in USA manufacturer of rotomolded coolers. In addition to rotational molding, Gregstrom offers value-added services like design assistance, polyurethane foam filling, assembly and testing, and distribution. We also have a portfolio of projects like this Heineken draught cooler.
Seamless, One‑Piece Construction
Rotational molding creates plastic coolers that are free from weak points that can crack or leak. Unlike injection molding, which forces molten plastic into a mold under high pressure, rotomolding uses slow biaxial rotation and heat to evenly distribute material. As a result, rotational molding doesn’t cause thinning in the walls – a common injection molding issue.
Uniform Wall Thickness for Strength and Insulation
Because rotomolded walls have a consistent thickness, rotomolded coolers combine structural integrity with predictable thermal performance. Products with a double-walled construction have a void or open area that Gregstrom fills with polyurethane foam. This foam is an excellent thermal insulator, and it keeps out water and resists mold growth.
Mold‑In Features Without Added Assembly
Rotational molding is a pressure-free process that enables hardware and functional features to be molded-in directly to the cooler body. Examples of these features include:
- Tiedown slots
- Hinge mounts
- Locking points
- Handle recesses
- Drain channels
Molded-in features reduce secondary operations, but Gregstrom can also provide assembly services if you need them. For example, some coolers need wheels (casters), bottle openers, or plugs.
Design Flexibility and Material Options
Rotomolding supports complex geometries and a wide range of surface textures and colors. Today, many high-performance coolers are made from LLDPE because of its high impact resistance, UV stability, and flexibility without brittleness. Other materials, such as HDPE and PP, may be used instead depending on stiffness, chemical resistance, or cost requirements.
Ask Gregstrom for Rotomolded Coolers
Are you looking for a Made in USA manufacturer of rotomolded coolers? Gregstrom is the rotational molder that does more. With added-valued services like design assistance, polyurethane foam filling, and assembly and testing, we can simplify your production process. We can even handle storage, shipping, and distribution.
