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The Fusion System produces a bonded seam by running a hot metal wedge between the overlapped area of the Poly-Flex liners. As the welding machine advances, these overlapped portions of the liners come together at the tapered end of the wedge, where pressure from two nip/drive rollers causes the heated membranes to bond together. The heat applied to the overlapping surfaces is precisely controllable.
This seaming method is designed to achieve the following:
Monitor operating temperatures via digital readout.
Form uniform bonds by applying consistent pressure to the seam areas.
Reduce surface tension and remove surface contamination without grinding, which improves seam strength.
Ensure high reliability, which results in consistent seam integrity.
Minimize operator error, as the machine is semi-automatic.
Seaming procedures using fusion welder:
Surfaces shall be clean and dry.
Test welds shall be performed prior to field seaming each morning and afternoon.
The overlap between Poly-Flex liners shall be at minimum 4 inches. The two sheets shall be straightened to keep the seamed edges smooth and wrinkle-free.
FILLET EXTRUSION WELDING SYSTEM
An extrusion weld is produced by a 4mm or 5mm diameter Poly-Flex welding rod manufactured from the same material used to produce Poly-Flex liner. The Poly-Flex welding rod is applied as a "welded bead" at the edge of two overlapped liners, resulting in a welded seam.
Seaming procedures using extrusion welder:
Surfaces shall be clean and dry.
Test welds shall be performed prior to field seaming each morning and afternoon.
The area which is to receive the extrusion bead shall be ground to remove surface contamination and surface tension.
The welding rod shall be free from dirt, dust, moisture, and tangles at all times.
The machine shall be purged for approximately 30 seconds prior to actual extrudate welding.
The bottom portion of the welding die shall stay in intimate contact with the liner and conform to various seam angles and configurations.
The welder die shall be kept "on center" at all times, ensuring that an equal amount of extrudate bead is applied to both portions of liner overlap (top and bottom).
A consistent forward welding speed shall be maintained, to ensure a smooth and uniform extrudate bead.
All patches shall have a 1" radius at corners, and be securely tacked to the liner.
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