Rotational Molder Manufacturers and Companies

IQS Directory provides an extensive list of rotational molder companies and suppliers. Utilize our website to review and source rotational molder companies with our easy-to-use features which allow you to locate rotational molder companies that will design, engineer, and manufacture rotational molders for your exact specifications. Our request for quote forms make it easy to connect with leading rotational molder manufacturers. View company profiles, website links, locations, phone number, product videos, customer reviews, product specific news articles and other production information. We are a leading manufacturer directory who will connect you with the right manufacturers whether you are looking for desktop rotational molders, hollow plastic products, or plastic bins.

  • 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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  • Tampa, FL

    At Gator OEM Solutions, we take pride in being a leading provider of innovative rotational molding solutions, dedicated to delivering high-quality products and exceptional services to our clients across various industries. With years of experience and a passion for excellence, we have established ourselves as a trusted partner in the field of rotational molding. Our product portfolio encompasses a diverse range of rotational molding products, including custom-designed tanks and containers.

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  • Lacombe, AB

    At D&M Plastics Inc, our expertise lies in delivering exceptional rotational molding solutions, elevating the standards of custom plastic manufacturing. With a legacy rooted in innovation and a relentless pursuit of excellence, we stand as leaders in crafting superior-quality plastic products through the rotational molding process.

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Rotational Molders Industry Information

Rotational Molders

There are many advantages to using a rotational molder when manufacturing various plastic products that are in high demand today. When making plastic products, the ability to move a mold can be very helpful, and it makes for a myriad of available plastic fabrication possibilities. Rotational molders also reduce production costs by controlling cycle times and increasing the efficiency of the thermoplastic casting process. Rotationally molded plastic products can be customized to many different thicknesses, material compositions, configurations, and product specifications. Additionally, there are a multitude of temperature, melt flow, and shrink rate issues that can be solved using rotational thermoplastic molding. This industry is continuously experiencing innovations and becoming increasingly efficient.

Being that roto casting uses centrifugal force and gravity to fill a mold, rotational molds have lower costs upfront. This is especially true when compared to other molding processes such as injection molding and blow molding.

Quick links to Rotational Molders Information

Resins and Materials

Resins and plastics used in rotational molding can be composed of a few different materials. Each type of polymer or resin has different properties that different products may require. For instance, not all plastic materials are FDA approved, so where one type of polymer would be perfect for a product that requires strength, it may not work in an application where it will come in contact with food.

Polyethylene is one of the main materials used in this roto casting process. Some types of polyethylene products include:

  • Low-Density Polyethylene (LDPE)
  • Linear Low-Density Polyethylene (LLDPE)
  • Cross-Linked Polyethylene (HDPE)
  • Regrind from Internally Recycled Polyethylene Scraps

Polyethylene isn't the sole material that can be used in the rotomolding process. There are a few other materials that can also be used. Some other types of these roto-molded plastic materials are:

Benefits and Drawbacks of Rotational Molding

Using rotational molding has a few benefits that would be difficult to achieve using other plastic forming processes.

Shorter lead-time from concept development to production.
Can be made with a one-piece hollow construction.
Unparalleled design flexibility.
This can be said about both small plastic parts to large industrial-style products.
Economical for short production runs.
Helpful in the areas of prototype research and volume production.
The plastic roto casting process creates excellent load-bearing products.
This type of thermoplastic casting makes it simple to produce multi-walled parts.
Product thicknesses can be varied without making modifications to the mold.
Cooling costs are lower and more economical.
Rotationally molded products are more resistant to cracking and corrosion.
Complex contours, flanges, and molded graphics can be created with this type of molding.
Colors in plastics are so evenly distributed that they never crack or chip.
There are many FDA-approved products, materials, and designs that can be created and used with this type of molding process.

The main disadvantages of rotational molding are the slowness of the process compared to other formation methods like injection molding as well as the high cost of rotational molding equipment.

The Rotational Molding Process

Rotational molding (otherwise known as rotomolding) is a casting process commonly used in the plastic fabrication industry. The molding process is done in four steps.

  • The mold is filled with a polymer.
  • A heating tool is used with an oven to melt the materials.
  • A cooling tool solidifies the part.
  • The part is removed from the tools.

Hollow parts are produced by pouring powder or liquid types of resin in a hollow mold or tank. Molds are rotated bi-axially using a tool within an oven. Rotation continues until the resin melts and coats the inner cavity of the mold. Parts are then cooled and removed from the mold. A wide range of parts and plastic products and parts are created using this unique form of thermocasting.

Rotational molders, in some ways, are very similar to plastic extruders, injection molders, and vacuum formers. Each machine involves the heating of raw plastic material beyond its melting point in order to form the plastic into a usable product. The major difference between rotational molders and other plastic formation tools is that roto molders involve a movable mold. The rotational molding process begins with a collection of raw plastic material in a partially open mold. Once filled, the mold is sealed and heated. Once the plastic within the mold is heated beyond its melting point, the mold is rotated in order to distribute the plastic throughout the mold. When the plastic has coated the mold's interior, the mold is cooled by water jets or other cooling methods. The newly rotationally molded plastic product is then ejected from the mold and either prepared for shipment to customers or sent for additional processing like cutting and surface treatment. Many parts can be produced simultaneously during rotational molding, resulting in very little scrap and reduced assembly costs. The main disadvantages of rotational molding are the slowness of the process compared to other formation methods like injection molding as well as the high cost of rotational molding equipment.

Rotational Mold Machines

There are a few types of molding machines. Each operates differently, and it can be helpful to understand the basics of how they work. Some molding machines include clamshell machines, rock and roll machines, and shuttle machines.

Clamshell Machines
Have a singular arm. It is usually supported by other arms on either end. This machine uses the same chamber to heat and cool the mold. Considering the size of the product it makes, this machine is economically friendly. Clamshell machines are commonly used in schools for prototyping.
Rock and Roll Machines
Designed to produce long and narrow parts. Some machines are of the clamshell type and only have one arm. Each arm rotates the mold 360 degrees in one direction while simultaneously rocking the mold at 45 degrees angles above and then below the horizon. Newer designs use hot air for mold heating. Rock and roll machines are great for large parts. Their smaller chambers are quite cost-effective compared to other bi-axial machines.
Shuttle Machines
Tend to have two arms that move the molds between a heating chamber and a cooling station. These arms turn independently and bi-axially. The mold is moved in a linear motion in and out of the chambers.

Rotational Molds That Are Available

The quality of the mold consumers choose is very important. There is no substitute for a good mold. A production rotational molder can help consumers find the best type of mold for a specific project and which type of resin would be most suitable.

Cast Molds
One of the most commonly used rotational molds. Cast molds can be used to produce both large and small parts. Cast molds tend to produce parts that have lots of detail and elaborate designs. They can be easily tweaked to integrate design changes. These molds are also great for "pulling" on the textures and shapes of existing objects. Essentially, parks with complicated curving or unique features are well suited to be cast in this way.
Epoxy Molds
Work by using a liquid polyester which works with thermosetting and then adding epoxy, which is formed and then cured. Like cast molds, these epoxy molds are fantastic for short runs or concept designs that may need adjustments made to them before their final versions are produced. Epoxy molds are comparatively inexpensive but do not have the same tolerance levels and durability that other molds may have.
CNC Molds
Used in situations where extreme precision is required. CNC molds are also good in circumstances that require extended production runs. They tend to be pretty expensive and are usually only used in special circumstances.

Products Made From Rotocasting

Many fantastic products can be produced using roto casting, some of which include tanks and basins.

Plastic Tanks
One product that is commonly created using roto-molded plastic. Tanks come in a wide range of sizes and styles. Styles may vary depending on which plastic molding process was used during their fabrication. Some common tank sizes are 300, 230, 130, 100, 65, 135, 220, 330, and 550 gallons. Though it is not a standard size, many tanks are even capable of holding 800 gallons or more. Rotational plastic molding is one of the only casting processes that can produce double-walled products. Double walls are an important component of many plastic tanks. A few things consumers may want to keep an eye out for when shopping for these types of tanks include quality construction, correct sizes, and appropriate thickness.
Tank Stands
Used to elevate molding tanks at different levels. These stands can come in many different specifications, strengths, and sizes. Stands are usually compatible with tanks of the same brand, though custom stands can also be made. They are usually made of different types of heavy gauge steel in order to have good strength and corrosion resistance. Some stands are stackable and may even contain storage. Many are finished with chemical-resistant coatings as well. The seller that a consumer chooses to purchase tank stands from will be able to help them find the right tank stand for their operation. A durable and reliable stand is a very important component of a thermoplastic casting unit. Often, manufacturers of plastic tanks will also offer tank stands.
Containments/Containment Basins
Large basin-style tubs that go beneath the tank and stand unit. Their purpose is just that, containment. They protect from leakage or accidental spillage of plastic materials. Some containments can also serve to stabilize the tank. These containments come in sizes that are usually compatible with specific brands and tank and stand units. It is important to choose a containment that is durable and of the right size. Containments can be a very useful component of the roto casting process.

Other products include toys and leisure products, industrial products, medical products, marine industry essentials, and many other miscellaneous plastic items.

Accessories for Rotational Molders

Consumers also may be interested in purchasing things like A/C solar mounting brackets, straps, containment basin hardware, plastic bulkheads, quick set-up brackets, stainless steel bulkhead fittings, hardware for tank stands, ball valves, lid replacements, and other solar packages and components from producers who use roto casting and sell roto casting machinery. Rotocasting products and accessories are sold by many vendors who are usually happy to help consumers find what they need for any number of rotomolding-related applications.

Choosing the Right Rotational Molder Manufacturer

It may be helpful for consumers to take time to consider which company they choose to work with when looking for roto casting products and parts.

Understanding all of the concepts related to roto casting can seem like a complicated endeavor, and finding a knowledgeable seller can help consumers find what they are looking for more quickly. A good manufacturer will be able to answer any questions that their clients may have. Sellers should also be able to help with things like service and repairs of molding equipment, and some companies may even be willing to assemble tanks and stands on-site. Companies may even offer to send their clients field service technicians. In addition to selling roto casting parts and related accessories, many companies sell a variety of resins and plastics which can save clients time and money if they choose to purchase products in bulk. A manufacturing company that offers high-quality products is also a must because products created with a good design and premium materials are going to be more reliable and efficient.

More Rotational Molder Information

Rotational Molders Informational Video


Fibertech Promotes

Fibertech Inc. is pleased to announce the promotion of Greg Martin to Senior Account Manager of Custom Molding. Greg joined Fibertech nine years ago and has held several successful positions within the company. Greg brings a wealth of experience to his new role and we are excited about his abilities to serve our growing customer base in Custom Rotational Molding. Fibertech Inc. is a rotational molding company that designs and manufactures a complete line of plastic material handling products. Headquartered in Elberfeld Indiana, Fibertech offers innovative custom molded... Read More About This

Improved Design on the LT67 Laundry Cart

Fibertech, Inc. has introduced an improved design to our LT67 laundry cart. Whereas the typical laundry cart has horizontal ribbing to provide structure and support, the Fibertech laundry cart now includes vertical supportive ribbing on the back side of the laundry cart to enhance the horizontal ribbing and better handle the weight of the linens. Fibertech’s rotationally molded laundry carts include the new vertical and horizontal ribbing on the body, reinforced plastic base, with industrial-strength casters. This cart is built to handle the load and withstand the test of... Read More About This