Which process is described by a mould being created from wood or epoxy resin and a heated plastic sheet placed over it to form a shape?

• A. Vacuum Forming
• B. Blow Moulding
• C. Injection Moulding
• D. Extrusion Moulding

Answer: (A)

Vacuum forming shapes a flat, heated plastic sheet by draping it over a mould and pulling air away with suction. The mould can be made from wood or epoxy resin, and as the sheet is heated to soften, a vacuum draws it into the mould’s contours, creating the form. Once it cools, the sheet retains the shape and is trimmed as needed. This matches the description because the process centers on using a sheet over a mould and using suction to form the shape, rather than injecting molten plastic, extruding, or inflating a parison with air. The other methods involve different mechanisms—air to expand a preform, injection of molten plastic, or extrusion of a continuous profile—so they don’t fit the scenario.