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Custom Rotational Molding

Rotational molding – or "rotomolding" – is an efficient and cost-effective manufacturing technique for creating hollow plastic parts. At Faribo Manufacturing Company, we specialize in complex manufacturing or plastic parts in a huge range of shapes. We also offer vacuum forming. Contact us at our office near Minneapolis, Minneapolis, to learn more.

Custom-Made to Your Specifications

Rotomolding is an excellent method for producing complex parts in a variety of materials. The simple, flexible process for special designs and produces extremely consistent results.

How It Works

Rotomolding uses a fairly basic process to produce plastic products. First, heat is used to melt and fuse a plastic resin in a closed mold. No pressure is required. During stage one, resin is loaded into the mold. In stage two, heating and fusion take place in the heat oven. Then, the mold is rotated, usually on two axis at a low speed. Heat penetrates the mold and the resin adheres to the mold's inner surface until it is completely fused. In the final stage the mold is cooled by air, water spray, or both during the rotating process. The temperature is lowered at a gradual rate to ensure proper hardening. Once the plastic is cool, the mode is opened to reveal the finished product.


Any Size

Rotomolding is used to create a wide variety of products in a huge range of sizes, from small ear syringes made of plastisol to immense 22,000-gallon vessels of polyethylene. The process can be used to create an almost endless variety of shapes.

A World of Benefits

Rotomolding is effectively replacing more traditional methods of plastic fabrication. It delivers better results with fewer breakages and is often less expensive than the alternatives. Finished products are strong and have excellent resistance to the elements. Changes in temperature are usually no problem unless the variation is very extreme. In addition, rotomolded plastics are not affected by most chemicals, oils, or food juices. Products produced using this method are virtually stain-free because the molding materials are not subjected to the negative effects of pressure when in the molten state.