Hollow, sealed products — without glue or other joining
Low weight combined with high stiffness and strength
Three-dimensional details with surfaces according to specification
WHAT IS TWIN SHEET
Two plates, one process, one finished product
Twin Sheet combines vacuum forming and high pressure forming by forming and welding two sheets together in the same process. It requires a double forming tool and a Twin Sheet vacuum forming machine.
The result is a product that is hollow and dense – without glue or other joining techniques. Twin Sheet products can also be filled with foam on the inside for extra rigidity or insulation.
TYPICAL APPLICATIONS
Pallets, containers for medical equipment, cabinets, ventilation products, leisure equipment and many parts for airplanes, cars and trains.
HOW IT WORKS
Twin sheet in four steps
1. Tool
The tool is placed in the Twin Sheet machine. The sheets are fed in.
2. Heating
The sheets to be formed are heated with upper and lower heat.
3. Vacuum forming
Using vacuum and possibly compressed air, the plastic material is formed in the mold. The edges are welded together in the process.
4. Cooling
Once the plates have been shaped, they are cooled and ready for further processing.
MORE ABOUT VACUUM FORMING
See also
Vacuum forming
High Pressure
FAQ
Frequently Asked Questions about Twin Sheet
Twin Sheet is a variation of vacuum forming where two sheets are heated and formed simultaneously, and welded together at the edges in the same process. The result is a hollow, tight product without glue or other joining.
Twin Sheet provides a closed, double-walled construction with high rigidity and low weight. The inner cavity can also be filled with PUR foam for extra rigidity or insulation.
Pallets, medical equipment containers, cabinets, ventilation products, recreational equipment, and parts for aircraft, cars, and trains — where weight, stiffness, and hollow volumes are important.
Yes. Twin Sheet requires a dual mold tool and a Twin Sheet vacuum former. The tooling is more complex than for pure vacuum forming, but still significantly less expensive than injection molding tooling.
Yes. We can refill Twin Sheet products with PUR foam for increased stiffness, insulation or cushioning.
We can produce Twin Sheet components up to 1300 x 1850 mm with a depth of up to 300 mm.