Pneumatic forming is a widely used technique for shaping thermoformed parts from rolls or sheets. This process utilizes compressed air to apply greater force during the forming stage, ensuring precise shaping and efficient production. Find out how pneumatic forming works and the key advantages it offers in this article.
Sarah Guaglianone
Updated on June 3, 2026
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Pneumatic forming is a specialised process used in plastic thermoforming and the twin-sheet process. In this method, the heated material is pressed precisely against the tool using additional compressed air. This produces components with particularly sharp contours, uniform wall thicknesses and high precision.
In pneumatic forming, the heated semi-finished material, either sheet or roll material, is pressed against the tool using compressed air. Since high forces are involved, robust aluminium tools are required. Prototype materials such as Ureol or synthetic resins cannot withstand the pressure and could damage the machine.
Pneumatic forming enables the use of specific forming techniques to control wall thickness distribution and geometries in a targeted way.
Although pneumatic forming machines are more expensive to purchase, the process offers key advantages in terms of precision, cycle time and material distribution.
| Advantages of pneumatic forming | Disadvantages of pneumatic forming |
|---|---|
| Sharper contour definition than vacuum forming | Higher tooling costs than with vacuum forming |
| Lower risk of chill marks | Higher energy costs than with vacuum forming |
| High temperature resistance | / |
| Shorter cycle times | / |
| Suitable for large quantities | / |
Pneumatic forming is an effective method for precise and economical thermoforming of plastics. The combination of targeted compressed air application and robust tools enables sharp forming. Despite higher initial investments, pneumatic forming machines offer advantages over vacuum forming machines thanks to shorter cycle times and higher temperature resistance.
Pneumatic forming is particularly suitable for projects with high quantities and demanding requirements, such as transparent engineering plastics or pre-printed parts. This makes pneumatic forming a cost-efficient, high-quality solution. Do you want to get started with your thermoforming project? Then submit your request now via our configurator!
Pneumatic forming is a specialised plastic thermoforming process in which heated thermoplastic material is pressed against the contours of a tool using targeted air pressure. A bottom-up approach ensures uniform material distribution, high detail accuracy and precise forming, even with complex geometries.
