Vacuum forming
（重定向自Vacuum former）
![Vacuum forming machine to produce inner liner/food liner of refrigerator](/Images/godic/202502/19/Vacuum_forming_machine3014.jpg")
![Kevo, a small 5x5](/Images/godic/202502/19/Kevo_Vacuum_Former,_Kiwi_Green3014.jpg")
3014.jpg")
![A sheet of vacuum-formed plastic. The pieces needed (in this case parts for a model aeroplane) will need to be cut out of the sheet.](/Images/godic/202502/19/Vac-formed_plastic_new_parts3015.jpg")
Vacuum forming is a simplified version of thermoforming, whereby a sheet of plastic is heated to a forming temperature, stretched onto a single-surface mold, and forced against the mold by a vacuum is formed into permanent objects such as turnpike signs and protective covers. Normally draft angles are present in the design of the mold (a recommended minimum of 3°) to ease removal of the formed plastic part from the mold.