What method is commonly used to make plastic kettles?

The method most commonly used to make plastic kettles is injection moulding. This process involves injecting molten plastic into a mould where it cools and solidifies into the shape of the kettle. Injection moulding is particularly well-suited for producing complex shapes with high precision, which is essential for functional items like kettles that need to fit together perfectly to prevent leaks.

This method allows for efficient mass production, which is vital for manufacturing items like kettles that are produced in large quantities. Additionally, injection moulding supports the use of various thermoplastics, enabling the creation of lightweight, durable, and heat-resistant components—attributes that are essential for kitchen appliances.

While other methods like blow moulding, transfer moulding, and compression moulding have their specific applications and advantages, they are not as ideal for the complexities and material properties required in kettle production as injection moulding.