GEISS Glossary
Twin-sheet process
The twin-sheet process is a specialised thermoforming method for producing hollow plastic components. In this process, two thermoplastic sheets are heated simultaneously, drawn into two matching mould halves and then welded together under heat and pressure. The result is closed, particularly stable hollow bodies with low weight.
Advantages and applications of the twin-sheet process
Thanks to its double-wall structure, the twin-sheet process provides high dimensional stability and strength while reducing material usage. Internal reinforcement ribs or channels can be directly integrated into the mould, offering additional functionality without further processing steps.
Typical applications of the twin-sheet process include housings and covers with large cavities, tanks and containers for liquids or gases, as well as lightweight components in vehicle and machinery construction.
For the twin-sheet process, GEISS offers specially developed thermoforming machines with automated loading and precise temperature control – ideal for highly complex component geometries and high production volumes.
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