Granger Plastics Opens More Than Three Decades of Rotational Molding Expertise to the Industry
RotationalMolding.com brings practical engineering knowledge, process guidance and real-world manufacturing experience together in one expanding industry resource.
By RotationalMolding.com Editorial Team
Published August 6, 2026
A New Resource Built From Real Manufacturing Experience
For more than three decades, Granger Plastics Company has worked with engineers, manufacturers, OEMs, entrepreneurs and product developers to turn ideas into durable rotationally molded products. Since our founding in 1994, our team has helped create thousands of different custom rotomolded products serving an extraordinarily broad range of industries and applications.
That experience has taught us something important: the strongest manufacturing decisions usually begin with better information. Product designers need to understand how rotational molding affects part geometry. Engineers need practical guidance on materials, wall thickness, draft, inserts and mold construction. Purchasing professionals need to understand where the process delivers value. Entrepreneurs and OEMs need a realistic picture of what it takes to move from an idea to a production-ready product.
RotationalMolding.com was created to make that knowledge easier to find, easier to understand and more useful in real-world decision-making.
More Than a Traditional Manufacturing Website
RotationalMolding.com is not intended to function only as a corporate brochure or product catalog. It was developed as an expanding educational and technical resource for people who want to better understand rotational molding, also known as rotomolding, and evaluate how the process may apply to their products, projects and industries.
Visitors can explore information covering the rotational molding process, product design considerations, mold development, material selection, engineering requirements, manufacturing capabilities and applications across numerous commercial and industrial markets. The site also provides detailed information about custom rotational molding services and products manufactured for demanding real-world environments.
The goal is straightforward: provide useful information that helps people ask better questions, identify potential challenges earlier and make more informed decisions throughout product development.
Knowledge Gained Across Thousands of Custom Products
Granger Plastics will celebrate its 33rd year in business in September 2026. During that time, the company has manufactured thousands of different custom rotationally molded products and supported customers across aerospace, defense, transportation, infrastructure, agriculture, marine, environmental, material handling and many specialized industrial markets.
No two projects are exactly alike. Some begin with a detailed engineering package. Others begin with a sketch, a damaged legacy product or a problem that has never been solved before. Each project adds to the practical knowledge required to evaluate materials, tooling, geometry, performance expectations, production requirements and long-term product use.
RotationalMolding.com gives Granger Plastics a platform to organize and share that accumulated experience with a much broader audience.
A Message From Shawn Cravens
“Over the past three decades, we’ve had the privilege of working alongside engineers, entrepreneurs, OEMs and manufacturers representing an incredible variety of industries and applications. Throughout that journey, we’ve learned that the best solutions almost always begin with better information, thoughtful collaboration and practical engineering experience. RotationalMolding.com was created to share the knowledge our team has gained through thousands of projects—not only with our customers, but with anyone interested in understanding what’s possible through rotational molding. We hope it becomes a trusted resource where engineers, designers, manufacturers, educators and future innovators can learn, explore new ideas and discover solutions that help move our industry forward.” — Shawn Cravens, General Manager, Granger Plastics Company
The Beginning of a Long-Term Initiative
The launch represents the beginning of a long-term commitment to expanding the amount and quality of practical rotational molding information available online. Future additions may include deeper engineering articles, application guides, case studies, technical references, manufacturing insights, videos and interactive resources designed to support professionals throughout the product-development process.
As the site grows, RotationalMolding.com will continue connecting educational content with real manufacturing experience. That combination is essential. Technical information is most valuable when it reflects the realities of tooling, materials, production, performance and customer requirements.
Explore RotationalMolding.com
Engineers, OEMs, manufacturers, purchasing professionals, educators, students and product designers are invited to explore the new website and follow its continued development.
This launch is an important first step—but it is only the beginning.
Read the official RotationalMolding.com launch announcement on Marketers Media.