Hot Air Welding & Sealing

The process of using a hot air weld involves the use of a nozzle to force heated air between two layers of material. The panel edges to be joined are channeled by guides, in this case through a stream of heat and then directly between a set of pressurized rollers to complete the heat sealing process.

As two panels are fed through metal folders, the desired seam width is lapped at the nozzle. The rollers pull the material through as hot air is forced between the layers, just before it goes through a set of pinch rollers. The materials are heated and slightly melted before going through the pressure rollers. After the pressure rollers weld the materials, the product is quickly cooled, resulting in a thermal weld of the two materials. The overlapping seam is equal to or even stronger than the original materials and creates a tight seal that has great tear resistance and is durable against abrasion.