Custom Rotational Molding

custom rotational molding companies

Custom rotational molding is a manufacturing method that allows for the creation of high-quality parts in a short amount of time. Although there are many steps involved in the custom rotational molding process, the outcome has several benefits. The most important benefit is that it can create complex shapes and designs. It also can produce parts with intricate details, such as internal cavities or channels.

Custom Rotational Molding Process

Custom roto-molding is a process in which a liquid resin is injected into a mold and then rotated to make a hollow piece. Next, the mold is cooled, the part removed, and then painted or finished. This process was first introduced by General Electric (GE) in the 1950s. Since its introduction, custom rotomolding has become an industry standard for creating various products. In addition, this method of production has been adopted by other companies such as 3M, GE Healthcare, and Thermo Fisher Scientific.

Advantage of Using Custom Rotomolding

Custom Rotation Molding can make many products like tanks, toys, action figures, pet toys, industrial parts, and medical devices. There are many advantages to using custom rotation molding over traditional manufacturer methods. These include:

Cost Effective

Custom rotomolding is cost effective because it uses less material than traditional methods. For example, if you were to use injection molding to create a toy, you would need to purchase expensive molds and materials. However, if you use rotomolding instead, you could buy a simple plastic container and fill it with your desired product.

High Quality

Another advantage of custom rotomolding is that it produces high quality parts. In addition, because the process does not require cutting or trimming, the final product will have no imperfections.

Quick Turnaround Time

Another significant advantage of custom rotomoulding is its quick turnaround time. Usually, the entire process takes about two days from start to finish. As a result, you can get your product out on the market faster than traditional methods.

What is the Difference Between Rotomolding and Injection Molding?

custom rotomoldingInjection molding and rotomolding are both processes that involve injecting molten plastic into a mold. However, they differ in how the plastic is injected into the mold. In injection molding, the plastic is injected through one end of the mold at high pressure. Once the plastic reaches the opposite end of the mold, it cools and hardens. Then the mold opens, and the part is ejected.

On the other hand, in rotomolding, the plastic is injected into a rotating mold. As the mold spins, the plastic is forced against the walls of the mold. When the mold stops spinning, the plastic solidifies. After the mold stops spinning, it is opened, and the part is removed.

Rotomolding vs. Injection Molding – Which is Better?

In general, rotomolding is more popular than injection molding. It’s because it is cheaper and quicker to manufacture. 

Custom RotoMolding – Industry Benefits

Custom rotational molding is a cost-effective way to produce large quantities of parts in a short amount of time. This process can be used for low-volume and high-volume production, making it especially useful for companies that need to order thousands of pieces at a time. In addition, this method helps quickly turn your ideas into reality without significant delays or costs associated with tooling and setup.

Rotationally molded plastic is also flexible enough to allow changes in design and material as needed during the manufacturing process. You won’t have to be concerned about whether or not your planned modifications will affect other elements of your part—you can alter them at any point in the process!

Custom RotoMold Product Applications

Custom rotational molding is used in a wide range of industries.


Custom rotomolded parts are often used in the automotive industry. They’re ideal for producing small components such as door handles, wheel covers, and interior panels. These parts are usually made using ABS (acrylonitrile butadiene styrene) plastics, which are solid and durable.

Medical Devices:

Custom rotomolding has been widely adopted by the medical device industry. It’s perfect for creating devices like syringes, catheters, and implants. Medical devices are typically made from polypropylene, which is soft and easy to work with.


The aerospace industry relies heavily on custom rotational molders to create everything from aircraft seats to engine housings. Custom rotomolded parts are highly versatile because they can be designed to fit almost any shape or size.

Other Industries:

Custom rotomolders can make parts for various industries, including recreational, electronics, toys, packaging, and consumer goods.

Rotational Molding Capability

Custom plastic molding is a process that uses a series of molds to produce products from plastic or other materials. First, the materials are melted and injected into the mold, where they cool and harden into the shape of the mold.

After you send your design, we will create an organic 2D digital mockup for you to approve before proceeding with production. Once approved, our expert technicians will use it as an outline for creating your custom rotational molds. It enables us to give you precisely what you want for your product without additional costs or delays in manufacturing time due to revisions later on down the line! We are a certified mold builder!

We offer a variety of state-of-the-art services for all types of projects. Our team of experts can help you determine the best solution for your needs based on your budget and timeline. Call us today, and we can help you achieve your goals!

Custom Molding Project Process – Step 1: Design and Prototype

The first step in the plastic rotational molding process is to design and create a prototype of your part. It can be done with traditional CAD software, or you may choose to use 3D printing technology.

Your prototype should be made from the same material as your final product and with the correct wall thickness.

Once you’ve created your prototype, we’ll review it and provide feedback so you can make any necessary adjustments. If there are any issues with your design, we can modify it until you’re satisfied.

We can even take care of the entire prototyping process for you. Just let us know when you submit your order, and we’ll handle it from start to finish.

Custom Roto Molding Process – Step 2: Tooling

Tooling is the mold that is used to shape the plastic. It can be created with steel, aluminum, or other metals. Tooling comes in a variety of sizes and shapes depending on its application. For example, the tooling for the rotationally molded process is typically made with an in-house mold in a machine shop based on designs created by customers or our CAD engineer technician.

Our engineers have extensive product design experience and building custom tooling for various applications. As a result, they can advise you on the most appropriate tooling for your project.

Custom Rotational Molding Process – Step 3: Manufacturing

The last step in the fabrication process is manufacturing and shipping the product. After receiving your approval, we will begin producing your custom rotational molding.

Depending on the size of your project, this could take anywhere between one day and several weeks. Once completed, we will ship your finished product directly to you.

To ensure quality control, we will inspect every piece produced during manufacturing. It includes checking dimensions, surface finishes, and overall appearance.

You can be sure your product has been manufactured using only the highest craft standards! 

A Custom Rotomolding Project Offers Several Benefits

Although there are many steps involved in the roto molding process, our expertise in providing custom stress-free services, from concept to production, has many benefits for our clients.

First of all, our specialized molding services offer an efficient and low cost way solution for a wide variety of parts with design flexibility when compared to other methods.

It’s also environmentally friendly because it uses less energy than traditional manufacturing methods. Finally, you’ll be able to customize your next plastic product based on your needs.

We look forward to working with you soon!


Custom rotational molding is a premier way to make your products quickly and at an affordable cost. It allows you to create designs that fit perfectly into the mold, resulting in higher quality products with less waste. Please contact us or call R&R Technologies Inc for a free quote today!