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Rotationally Molded Products for Every Application

Rotationally molded products run the gamut from industrial components to children’s toys. Examples of products made by custom rotomolding companies include:

  • Road barriers
  • Mannequins
  • Ping pong balls
  • Medical spine boards
  • Kayaks
  • Playground equipment
  • Agricultural storage tanks
  • Car cupholders
  • Large decorative plant pots
  • Floating marine barriers
  • Fenders for heavy-duty trucks

Custom rotomolding is particularly well-suited for all these applications and much more. While the resulting parts can be quite complex, the four-stage process itself is simple:

  • Placing the powdered resin in a hollow mold
  • Heating and fusing the resin while the mold is biaxially rotated
  • Cooling the mold
  • Removing the product from the mold

A wide range of resins can be used to make rotationally molded products, including polycarbonate, nylon, PVC and polypropylene, although polyethylenes make up about 80% of all material used in rotomolding.

Rotational molding can accommodate a broad array of design features, such as:

  • Additives for weather resistance, flame retardation or static elimination
  • Inserts
  • Graphics
  • Threads
  • Handles
  • Undercuts
  • Flat surfaces without draft angles
  • Fine surface details

Rotationally molded products also offer a wide range of benefits, including:

  • Uniform wall thickness
  • Less required tooling
  • Strong outside corners that are stress-free
  • Minimal cross-section deformation or warpage
  • Ability to change wall thickness within the same mold

Because of the lower tooling requirements, rotomolding also provides a faster part-to-market turn-around than other plastics processing methods.

 Custom rotomolding provides additional advantages when it comes to rush deliveries or short runs. In fact, products can be rotationally molded in low volumes as well as volumes as high as 100,000 parts annually. Part size can range from a few inches to 20 feet or more.

Compared to other plastics processing methods, rotomolding also uses less scrap. For instance, rotational molding produces no sprues or runners like injection molding, and there are no off-cuts or pinch-off scrap as with blow molding.

Rotational molding companies can range from small, regional concerns to major international molders, like Centro Inc.

Visit polysort.com for a comprehensive list of custom rotomolders.

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