What is a key benefit of using injection moulding for plastic bottle caps?

Using injection moulding for plastic bottle caps is particularly advantageous due to its complex design capabilities. This manufacturing process allows for the creation of intricate shapes and features that would be difficult or impossible to achieve with other methods. Injection moulding involves forcing molten plastic into a precisely machined mould, which enables the production of highly detailed and accurate parts consistently. This capability is vital for bottle caps, which may need to include specific threading or sealing features to ensure they fit securely on bottles and maintain product integrity.

In comparison, while short production times and low energy consumption are benefits of injection moulding, they are not the primary reasons for its use in producing items like bottle caps. High strength-to-weight ratio is generally associated with the material used rather than the moulding process itself. Hence, the ability to achieve complex geometries makes injection moulding the preferred choice for producing plastic bottle caps.