Rotational Molding Company Gregstrom Corporation Is Family Owned

Rotational Molding Company Gregstrom Corporation is a 60 year old three generation family owned business. Since 1946 Gregstrom Corporation has been providing molding and forming for the widest range of industries. In addition to world class molding and forming services, we offer complete assembly, testing, packaging, inventory management, and direct shipment both domestically and internationally.

As a well established rotational molding company, we pride ourselves on the quality and services we have provided our customers. With an unwavering commitment to quality, customer service, and continual improvement, we strive to provide an array of customized services and value added options that are unparalleled. In addition to world class molding and forming, we offer complete assembly, testing, packaging, inventory management, and direct shipment both domestically and internationally.

Over the years, Gregstrom has been honored with various awards from customers in recognition of high levels of quality and service. Gregstrom has also been the recipient of numerous industry awards including:

  • SPISPI (Society of the Plastics Industry): Structural Plastics Show, New Product Design Special Judge's Award.
  • TITI (Thermoforming Institute): National Award for Pressure Formed Part of the Year.
  • TITI National award for Vacuum Formed Part of the Year.
  • TISPE (Society of Plastics Engineers): Thermoforming Division, Parts Competition People's Choice Award.
  • TIARM (Association of Rotational Molders): Outstanding Achievement in Rotational Molding Product Conversion.

Allow us to make your next project an award winning performance!

What is Rotational Molding?

Rotational Molding is a low pressure process where the strength required from the molds is minimal. This results in its ability to produce large, complex parts on short notice using low cost molds. The low processing pressure involved in rotational molding has the added advantage of producing parts which are virtually stress free.

Rotational Molding is a three step process. The first step is to load a pre-measured amount of liquid or powder resin into the mold. Next, the mold is moved into an oven, and rotated on two axes at low speed. As heat penetrates the mold, the resin adheres to the mold’s inner surface until it is completely fused. The last step is cooling. While still rotating, the mold is now cooled by air or water spray or a combination of both, lowering the temperature gradually. The mold is opened, the finished part is removed, and the mold is readied to repeat the cycle.

Gregstrom a rotational molding company offers services that are economical for short production runs, prototypes as well as high volume production. Our design flexibility ranges form small, intricate designs to large, complex parts.

Unique Features of Gregstrom Rotational Molding Services

  • Low tooling costs
  • Short lead time
  • Virtually stress-free parts
  • Uniform wall thickness with no thinning in extremities
  • Ability to produce multi-wall parts
  • Molded-in graphics
  • Molded-in inserts & hardware
  • Ability to easily change part thickness
  • Undercuts possible
  • Wide selection of surface textures and colors
  • Quick tooling modifications

About Gregstrom Corporation

Gregstrom Corporation is a third generation, family owned rotational molding company that has been forming lasting relationships for over 60 years. With an unwavering commitment to quality, customer service, and continual improvement, we strive to provide an array of customized services and value added options that are unparalleled in the industry. Over the years, Gregstrom Corporation has been honored with various awards from customers in recognition of high levels of quality and service. Gregstrom Corporation has also been the recipient of numerous industry awards from the Society of the Plastics Industry, Thermoforming Institute, Society of Plastics Engineers and Association of Rotational Molders.