Rotational Molding Vs. Injection Molding: Quick Facts And Aspects!

If you are trying to order plastic products from a manufacturer, you need to first understand their manufacturing techniques. Plastic molding, which refers to the process of manufacturing plastic products, can be done in many ways. Injection molding is one of the most commercially used molding technique, while in recent years, the popularity of rotational molding, also called roto-molding, has also increased. Companies like specialize in rotomolding, and here are some of the differences at a glance.

The basics

In case of rotational molding, the plastic resin powder material is placed in a mold and rotated in an oven and subjected to heat at a high speed. This causes the material to melt and it covers the inner walls of the mold. The mold is eventually cooled and the end product is taken out.

On the other hand, injection molding is a completely different process altogether. The material is first melted and then injected/blown into the mold under high pressure. The pressure causes the material to cover the entire surface area of the mold, taking its shape. The rest of the process is same as material, where the mold is cooled and the plastic part is removed.

Why consider rotomolding?

There are some advantages of rotomolding over injection molding. From plastic dumpster and recycle bins to kayaks and even slides for children playground, anything and everything can be made with rotomolding and with adequate strength and durability. Also, these products made with rotational molding are known to be extremely durable, even when there is a considerable abuse or change in temperature. Injection molding does have a few advantages as far as production cycles are concerned, but it is impossible to achieve consistent wall thickness that’s required for selected products with this technique. This is the precise reason why rotational molding is often thought of as the first option for products that must be durable.

Placing an order

If you want to produce goods with rotational molding, you must first find a manufacturer who specializes in the technique. It is important to understand that the costs of tooling with rotational molding is considerably lower, and since there is little material wastage, production expenses can be curtailed. Before placing an order, check the expenses involved, and if possible, go for a bulk order, which may entail you a special discount.

This doesn’t mean injection molding is not practical and useful anymore. Just that both processes have different uses and applications in the real world.

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