How to Create Successful Rotomolded Parts
Rotational molding, more commonly known as rotomolding, is a manufacturing process used to create hollow plastic parts. During the cycle, plastic resin is heated inside a mold that rotates along two perpendicular axes. This rotation evenly distributes the material along the interior surface of the mold, forming a consistent wall thickness. The result is a durable, seamless product that’s ideal for a wide range of industries.
Businesses turn to rotomolding for good reason. It offers an attractive combination of durability, cost-efficiency, and design flexibility. Additionally, the customizability is hard to beat. You can mold complex shapes, choose from a variety of colors and finishes, and design products that fit unique functional needs.
While the process may appear simple, producing a successful rotomolded product involves more than pouring plastic into a mold and turning up the heat. Achieving quality, consistency, and performance comes down to a few key points. In this blog, we’ll explore everything you need to know.
The Right Materials Make a Difference
One of the most important components of any rotomolding project is the material used. The plastic resin that’s chosen can have a significant impact on the final product’s performance and lifespan. Some materials will be better than others for specific purposes. A plastic tank designed to hold corrosive chemicals needs different properties than a piece of agricultural equipment exposed to the elements.
For example, linear low-density polyethylene is great for its flexibility and impact resistance. In contrast, cross-linked polyethylene (XLPE) has high stiffness and low temperature impact properties. At GVL Poly, we work closely with customers to select materials that meet performance requirements while staying within budget.
Precision in Process Control
Beyond the materials, the rotomolding process must be carefully controlled. Heat levels, rotation speed, and timing are all crucial variables that directly affect the quality of the final part. If the oven temperature is too low, the plastic may not fully melt. As a result, you’ll have incomplete coverage or weak areas. If the oven temperature is too high, the plastic can degrade. This causes discoloration or brittleness. Likewise, rotation speed must be precisely managed to ensure the resin evenly coats all areas of the mold without pooling or creating thin spots.
To maintain this level of control, GVL Poly relies on advanced equipment like the Leonardo SMART Molding Machine. This system allows our team to precisely control key processes, ensuring each cycle stays within optimal parameters. Learn more about this technology in our SMART Rotomolding Technology blog.
Quality Assurance
Meeting industry standards for impact resistance, load-bearing strength, and dimensional accuracy is non-negotiable. That’s why we invest in training, tooling, and inspection processes that help our team catch issues before they become big problems.
Flexibility and Problem Solving
Another step to a successful rotomolding project is flexibility. No two projects are the same. Some require extremely tight tolerances, others demand unique material blends, and many evolve as customer needs shift. That’s why problem-solving is built into the rotomolding process at every level. When challenges arise, success depends on the ability to adapt quickly.
Long-Term Partnerships Build Success
Partnering with an experienced rotational molding manufacturer is the blueprint for success. That’s why so many businesses partner with GVL Poly. With more than 30 years of experience, we’re here to help you determine if this process is right for your organization. And when you’re ready to start manufacturing, we’ll be here to support you. Our services are backed by experienced machine operators, engineers, designers, tool builders, and other professionals. When you work with us, you can be sure you’re getting the best products possible.
Let’s Make Something Great Together
Ready to learn more about our services? Reach out to our team for an initial consultation.
