A simple visualization of the forming process
Vacuum forming is a simplified version of thermoforming, in which a sheet of plastic is heated to a forming temperature; it is then stretched onto a single-surface mold and forced against the mold by a vacuum. This process can be used to create permanent objects from plastic, such as turnpike signs and protective covers. Usually, draft angles are incorporated into the mold design (with a recommended minimum of 3°) to ease removal of the formed plastic part from the mold
