What is a disadvantage commonly associated with rotational moulding?

Rotational moulding is a manufacturing process used primarily for producing hollow plastic parts. A notable disadvantage of this method is that it requires specialized moulds, which can increase the overall setup costs. Unlike other moulding processes, the moulds for rotational moulding are often made from materials that can withstand high temperatures and are designed to allow for the even distribution of plastic during the heating and cooling cycles.

The creation of these specialised moulds often demands greater initial investment and expertise in design, leading to increased costs, especially for low-volume production. This disadvantage can limit the practicality of rotational moulding for small production runs but is often offset by the benefits it provides for larger quantities or specific applications. Understanding this aspect is crucial for designers and manufacturers when selecting the right production method for their needs.