Leading Rotational Molder Manufacturers

When creating various plastic items in high demand, using a rotational molder has many benefits. A moving mold can be highly beneficial when creating plastic objects and opens up a wide range of plastic fabrication options. By regulating cycle times and improving the effectiveness of the thermoplastic casting process, rotational molders also lower manufacturing costs. Products made with rotationally molded plastic can be tailored to various thicknesses, material compositions, configurations, and product requirements. Read More…

Rotational Molders Rotational molders are machines that are used to form hollow plastic products using molds and rotational movement. The demand for plastic products is very high throughout all sectors of the global economy.

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 ...

Roto Dynamics Inc. $$$

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.

Sherman Roto Tank $$$

Western Industries Plastic Products, LLC, specializes in large-part plastic blow molding. We provide expertise and services in product design, process improvement, and product assemblies. We offer our customers comprehensive services and turnkey opportunities to achieve their specific project goals. We can assist with: R&D, product design, product improvement, and secondary-fixture design. For...

Western Industries Plastic Products LLC $$$

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!

Fibertech Plastics $$$

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 ...

Michiana Rotational Molding $$$

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!

Lerner Molded Plastics $$$

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...

Gator OEM Solutions $$$

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.

D&M Plastics Inc $$$
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Rotational thermoplastic molding is also used to address a wide range of temperature, melt flow, and shrink rate problems. This sector is always undergoing innovation and improving efficiency due to research and development. Rotational molds cost less upfront because roto casting fills a mold using centrifugal force and gravity. This method is particularly true compared to other molding techniques like injection molding and blow molding.

rotational molding

For rotational molding to consistently create high-quality parts, several interrelated factors and details must be configured properly: the specific part design, the plastic selection, the design and construction of the mold, and finally, the rotational molding procedure itself. The end-use criteria typically include guidelines describing the part's design, construction material, and measurements.

However, every design must also be useful and affordable. The part's design determines the cost of mold creation and the operation process. Due to their high melting temperature and viscosity, fluoropolymers, another type of product used in rotational molding, place extra constraints on the design of the process and the component.

rotational molding machine

Rotational Molding Process

Large hollow, seamless, and double-walled items are produced using the rotational molding plastic casting technique. The rotational molding process has three stages involving a heating chamber, a mold on a rotating frame, and a cooling chamber. Specially created rotational molds can produce both single and double-walled goods.

In this process, one of the polyethylene resins serves as the primary raw material for rotational molding and is placed into the mold at the start of the procedure. The mold is heated while being rotated in the heating chamber. The mold's frame can rotate the mold around its axis of rotation. The resin is distributed over the inside surface of the mold as it spins, giving the completed item a uniform thickness across its surface.

A predetermined amount of time is required for the mold to transition, i.e., from the heating chamber to the cooling chamber. The liquefied melted resin is allowed to cool before the plastic product is expelled from the mold. Rotationally molded goods are of the finest caliber and are renowned for their toughness and longevity.

Rotational Molders Available

Cast Molds: One of the rotational molds that are most frequently utilized. Both big and small parts can be made with cast molds. Cast molds frequently create components with intricate designs and a lot of detail. To include design modifications, they are easily adaptable. The textures and shapes of existing objects can be "pulled" with the help of these molds. This casting method works excellently for parks with intricate curving or distinctive characteristics.

Acrylic Molds: These molds work by adding epoxy and then curing with a liquid polyester that uses thermosetting. These epoxy molds, like cast molds, are excellent for small batches or prototype designs that may require modifications before their final forms are produced.

CNC Molding: When high precision is necessary, CNC molders are used. However, they often cost a lot of money and are only applied in unique situations.

Rotational molding products are mostly large plastic products such as:

  • Oversized containers
  • Vehicle part components
  • Animal habitats
  • Traffic cones
  • Recycling bins
  • Play area slides
cnc rotational molder

Applications of Rotational Molders

  • Rotational molding is the only way to make material handling tools like strong crates, stackable pallets, containers, and insulated boxes.
  • They can also make plastic storage tanks, gallon barrels, and carboys for holding small to extremely large amounts of water and chemicals.
  • Some examples of laboratory and medical supplies made with rotational molding include syringes, oxygen masks, and squeeze bulbs.
  • They also make sanitary products such as garbage cans, trash bins, and septic tanks.
  • Among other maritime vehicles and equipment for transit and water activities, rock and roll molding machines create rowing boats, canoes, kayaks, and buoys.

Choosing the Proper Rotational Molder Company

To make sure you have the most positive outcome when selecting a rotational molder company, it is important to compare at least 5 companies using our rotational molder directory. Each rotational molder company has a business profile page that highlights their areas of experience and capabilities and a contact form to directly communicate with the company for more information or request a quote. Review each rotational molder company website using our proprietary website previewer to get an idea of what each company specializes in, and then use our simple RFQ form to contact multiple rotational molder companies with the same form.

Rotational Molders Informational Video


Rotational Molding Power Pages

Rotational Molding

Blow Molding

Rotational molding, commonly referred to as "rotomolding", is a plastic casting technique used to produce large hollow, seamless, and double-walled parts. It is a three-stage process that involves a mold on a rotating frame, a heating chamber, and a cooling chamber. Molds for the rotomolding process are specially designed....

Blow Molding

Blow Molding

Blow molding is a type of plastic forming process for creating hollow plastic products made from thermoplastic materials. The process involves heating and inflating a plastic tube known as a parison or preform. The parison is placed between two dies that contain the desired shape of the product...

Compression Molding

Compression Molding

Molding is a manufacturing process that uses a mold - the latter being a solid container used to give shape to a piece of material. It is a forming process. The form is transferred from the mold to the material by...

Plastic Coating

Plastic Coating

Plastic coating is the application of liquid polymers or plastic on the surface of a workpiece by dipping or immersion. The result is a thick plastic finish for protective and decorative purposes. This gives the material additional resistance against...

Fiberglass Molding

Fiberglass Molding

Fiberglass molding is a method for forming complex and intricate parts using fiberglass resin. Though there are several reasons for producing parts and components from fiberglass, the most pressing reasons are the...

Polyurethane Molding

Polyurethane Molding

Polyurethane molding is the process of fabricating or manufacturing plastic parts by introducing a urethane polymer system into a tool or mold and allowing it to cure. Like any other type of plastic, the excellent processability...

Plastic Injection Molding

Plastic Injection Molding

Plastic injection molding, or commonly referred to as injection molding, is a manufacturing process used in the mass fabrication of plastic parts. It involves an injection of molten plastic material into the mold where it cools and...

Rubber Molding

Rubber Molding

Rubber molding is a process of transforming uncured rubber or an elastomer into a usable product by transferring, compressing, or injecting raw rubber material into a metal mold cavity...

Rubber Injection Molding

Rubber Injection Molding

Rubber injection molding is when uncured rubber is transformed into a usable product by injecting raw rubber material into a mold cavity made of metal. The applied pressure produces a chemical reaction like...

Plastic Molding Processes
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