Twin Sheet
Two thermoplastic sheets are formed and welded together in the same process. The result is hollow parts with strength, stiffness and low weight.
Twice as good
What is Twin Sheet?
Twin Sheet forming combines vacuum and pressure forming, forming and welding two plastic sheets together in a single process. Twin Sheet requires two separate tools and a special machine.
The technique produces a product with hollow, sealed sections without glue or other fastening techniques. Typical properties are strength, stiffness and low weight, and the parts can also be filled with foam.
How does it work?
The process in four steps
Twin Sheet forming uses heat and vacuum to form two thermoplastic sheets on a tool with two cast half sections.
Mould tool
The tool is placed in the Twin Sheet machine and the sheets are inserted.
Heating
The plastic sheets are heated from above and below to 170-210°C.
Vacuum forming
The plastic material is formed in the mould tools using vacuum. The edges are welded together in the same process.
Cooling
Once the plastic has been formed, it is cooled and is then ready for finishing.
The method
A unique method
Twin Sheet is a unique manufacturing technique in which two plastic sheets are heated and formed at the same time to create strong, hollow structures. The result is a light but very durable product, ideal where both strength and low weight are crucial.
The technique offers major advantages over traditional methods, such as increased stiffness and greater design freedom.
Applications
Common applications
Pallets, lids for medical equipment, electrical seals and cabinets, leisure equipment, ventilation products and many different parts for cars, aircraft and trains.
We manufacture customised products with high precision and quality, from prototypes and small series to larger production runs.
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