Rotational moulding is used to create which type of objects?

Rotational moulding is used to create which type of objects?

• A. Blow moulding.
• B. Vacuum forming.
• C. Rotational moulding.
• D. Injection moulding.

Answer: (C)

Rotational moulding is used to make hollow, large items with uniform wall thickness. In this process, plastic is placed in a hollow mold, which is heated and rotated on two axes. The melted plastic coats the interior walls as it spins, then cools to form a seamless, thick-walled shell. This makes it ideal for big hollow objects like storage tanks, drums, and water containers. Other methods serve different shapes and properties: blow moulding creates thin-walled bottles, vacuum forming makes shallow formed shapes from sheet plastic, and injection moulding produces precise, often smaller parts.

Rotational moulding is used to make hollow, large items with uniform wall thickness. In this process, plastic is placed in a hollow mold, which is heated and rotated on two axes. The melted plastic coats the interior walls as it spins, then cools to form a seamless, thick-walled shell. This makes it ideal for big hollow objects like storage tanks, drums, and water containers. Other methods serve different shapes and properties: blow moulding creates thin-walled bottles, vacuum forming makes shallow formed shapes from sheet plastic, and injection moulding produces precise, often smaller parts.