Vacuum Forming creates uncomplicated hollow shapes by which method?

• A. Blowing air into heated thermoplastic.
• B. Sucking a heated plastic over a mould.
• C. Injecting molten plastic into a die.
• D. Creating hollow shapes by cutting.

Answer: (B)

Vacuum forming works by heating a sheet of thermoplastic until it becomes pliable, then placing it over a mould and using vacuum to pull the sheet down and into contact with the mould. As it cools, the sheet retains the hollow shape of the mould, giving simple hollow parts. This method matches the idea of sucking a heated plastic over a mould.

Others don’t fit because blowing air into heated plastic is used in blow molding for bottles, injecting molten plastic into a die is injection molding, and simply cutting materials doesn’t form hollow shapes.