Rotomolding Manufacturers and Companies

IQS Directory provides a detailed list of rotomolding companies and suppliers. Find rotomolding companies that can design, engineer, and manufacture rotomoldings to your specifications. Peruse our website to review and discover top rotomolding companies with roll over ads and complete product descriptions. Connect with the rotomolding companies through our hassle-free and efficient request for quote form. You are provided company profiles, website links, locations, phone numbers, product videos, and product information. Read reviews and stay informed with product new articles. Whether you are looking for manufacturers of plastic seat rotomolding, high speed rotomolding boxes, and polyethylene rotomoldings of every type, IQS is the premier source for you.

  • Orange, CA

    As a full-service rotational molding company, Roto Dynamics is your source for high quality, custom rotomolded products. Since our inception, we have continued to earn success by closely working with our customers, developing innovative and tailored solutions. We are with you every step of the way, from design and development to production and assembly. For a complete view of our capabilities and services, check out our website, or submit a request for quote to see how we can serve you!

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  • Pearland, TX

    We are a custom manufacturer of rotationally molded products. Our state of the art technology creates precise, cost effective and dependable products. Whether your order is large or small, we want to be sure you are satisfied. We also manufacture a standard line of chemical storage and process tanks. All of our products go through rigorous testing. The safety of those working with or near our tanks and the environment is a top priority for us.

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  • Winfield, KS

    No matter what your blow molding needs are Western Industries is ready to assist you. We believe in thinking outside the mold and using unique methods to come up with large-part blow molding solutions for our customers. We have access to state-of-the-art technology and over 100 years of combined experience serving a variety of industries. When you choose Western Industries, you have the Western Advantage. Call today for more information!

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  • Elberfeld, IN

    We provide outstanding custom plastic rotational molding. Our teams offer short lead times and we will assist you from concept to production. All of our materials and designs are FDA approved and we can handle the most complex projects. We are your one stop shop for all of your rotational molding needs. Give us a call today to learn more information!

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  • Aurora, OH

    Our warehouses and equipment are designed to protect the quality and condition of the rotationally molded plastic products we sell and process. Our facilities feature state of the art equipment, and are run by a team of dedicated staff members who will help you find what you need. Contact us today!

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  • Constantine, MI

    Michiana Rotational Molding provides unparalleled rotational molding services that ensure efficient design, innovation, and functionality. Based in southwest Michigan, the company offers engineering, prototyping, finishing, design consulting, and quality control services. It has experience creating solutions for clients in the marine, home and garden, RV, and material handling industries and more nationwide. Choose Michiana Rotational Molding for exceptional rotational molding services.

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  • Ashland, OH

    Here at Hedstrom, we specialize in engineering, designing and manufacturing rotationally molded plastics; chemical and fuel tanks; retail displays; lawn and garden items; medical supplies; recreational, toy, sport and playground objects, plus more. Contact us about your roto molding needs.

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  • Brainerd, MN

    At Axisnorth Solutions, we specialize in crafting innovative solutions through our rotational molding, blow molding, and vacuum forming expertise. With a collective commitment to precision and excellence, we bring a wealth of experience to the table. Our seasoned team leverages cutting-edge techniques in rotational molding to produce seamless and durable products. Our meticulous attention to detail ensures that each rotation yields impeccable results.

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Rotomolding Industry Information


Roto molding or rotomolding, also known as rotomoulding, plastic rotational molding or rotational molding, is a plastic formation process used to shape raw plastic material into hollow, usable products.

Quick links to Rotomolding Information

Types of Thermoplastics

It involves the use of a rotational mold and nearly any thermoplastic. Some of the thermoplastics most commonly molded into plastic products using roto molding include: high density polyethylene (HDPE), low density polyethylene (LDPE), nylon, polyethylene terephthalate (PET), polycarbonate and polyvinyl chloride (PVC). Used to create both small products in large quantities and large products in small quantities, roto molding is known to create plastic formations that are uniform in both quality and precision wall width. The products it can produce are very diverse indeed, including items like plastic construction cones, plastic tanks and even plastic flamingos. Also, rotomolding can be used to create both standard and custom stock shapes.

Rotational Molding Process

Typically, roto machines consist of molds, an oven, a cooling chamber and mold spindles. The molds are mounted on the mold spindles, which allow the molds to rotate. Most roto molds are made out of aluminum or stainless steel. To begin the rotational molding process, manufacturers first stack raw plastic material into a half a mold until it is full. Once full, they attach the mold’s other half and then seal it. Once sealed, the plastic inside the mold is placed inside the oven and heated until it becomes either malleable or molten, depending on the requirements of the piece. At this point in most other thermoplastic forming or molding processes, like injection molding or extrusion, the manufacturer would apply heat and/or pressure to shape the molten plastic. In roto molding, however, the mold is instead rotated by the mold spindles upon which it is mounted. Depending on the type of the equipment being used, the mold may be rotated either in a single direction only or biaxially. The choice of which equipment to use depends upon what kind of shape or shapes a manufacturer would like to form. Either way, once the plastic has been rotated inside the mold long enough, it will have coated its interior, effectively taken on its shape. Once this has happened, the mold stops rotating and is quickly cooled down either inside the cooling chamber, by an external water jet cooling system or perhaps by another method. After it has been cooled, the plastic is ejected from the mold, having taken on its shape. Once a part has been roto molded it can either be prepared for its shipment to customers or it can be sent on for secondary processing like surface treatment or cutting. This depends entirely on the shape and requirements of the new part’s intended application. However, secondary processes and other forming processes are often used in conjunction with roto molding because the demand for plastic shapes is so large and varied.

Types of Rotomolding Machines

Roto molded parts can be made on one of several different types of roto molding machines. These machines include: rock and roll machines, clamshell machines, shuttle machines, vertical or up and over machines, carousel machines and swing arm machines. Each model offers something different.

Rock and Roll Machines
Specially designed with small heating chambers to create long, narrow parts.
Clamshell Machines
Actually a type of rock and roll machine, but they are distinguished by their use of a single primary rotational arm, though they usually also have support arms on their ends. Most other roto molding machines use two or more arms.
Shuttle Machines
Typically have two arms that work independently, moving the mold back and forth in between the heater and the cooler as it turns biaxially. Some shuttle machines do, however, have only one arm. In this case, the arm moves the mold horizontally from the heater to the cooler as it spins.
Vertical Rotational Machines
Smaller than most other rotomolding machines; they are considered small to medium in size. They are valued for their energy efficiency, which is born out of their compact heating and cooling chambers.
Carousel Machines
One of the most commonly used rotational molding machines. Carousel machines may have up to four arms and six stations, and they come as either fixed or independent equipment. Typically, fixed arm carousel machines consist of three arms that are required to move together, while independent arm carousel machines have between three and four arms, all which move separately from one another. Both types of carousel machines are available in a wide variety of sizes.
Swing Arm Machines
Can have up to four arms, all of which move bi-axially. The arms, which do not all have to be engaged at the same, are mounted on the respective corners of the machine, where they swing in and out of the oven.

More Rotomolding Information

Rotomolding Informational Video


Fibertech, Inc. Adds New Rotational Molding Machine & Creates New Jobs

Elberfeld, Ind. (April 21, 2021) – Fibertech, Inc. – an industry-leading manufacturer of high-quality, custom-engineered, rotational-molded plastic products including bulk containers, plastic pallets, plastic lockers, and more – is pleased to announce the recent addition of a Rotoline 260 press to its state-of-the-art facility, located at 11744 Blue Bell Road in Elberfeld, Indiana. The addition of this new machine will necessitate additional staff, so Fibertech will be adding 10 additional full-time employees to the team. “We are committed to investing in the latest technological advancements in order to meet and... Read More About This

Plastics Innovation and Resource Center

Roto Dynamics is excited to be participating in this year’s “Hands-on Rotational Molding Workshop” held at the Pennsylvania College of Technology. This two day seminar is presented by Paul Nugent, Jerry Ramsey and PIRC staff. The event is sure to be packed full of useful theoretical and hands-on training exercises. Since 2000, the Penn State rotational molding center has been in existence and offering technical research assistance and hands on resources to the North American rotomolding community. Partnering with the Association of Rotational molders (ARM) and Society of plastic engineers... Read More About This