Description Of Functions - Leister COMET Instructions D'utilisation

Description of functions

• Heating system
the material thickness the hot wedge position can be steplessly adjusted as required.
Cross-sectional diagram of hot wedge system
Upper drive /
pressure roller
Welding direction
Lower dirve/
pressure roller
• Welding Pressure
pressure rollers. The swivel head guarantees the equalisation of the pressure to both welded sections
(C and D) as well as on a welded seam without test channel.
This allows T-joints to be welded easily. During the welding process the pressure adjusts itself linearly to the
change in material thickness of the geomembrane liner.
Cross sectional diagram of an overlap weld
Seam thickness reduction = A – B
A : Thickness of the upper and lower membrane
B : Thickness of the welded seam
C : Welded section 1
D : Welded section 2
E : Test channel
• Drive Double drive system, is steplessly adjustable and elec tron ically controlled. The automatic control
system with tachogenerator is designed in such a way, that the adjusted welding speed remains constant
independently of the load. The power transmission to the drive/pressure rollers works through a three stage
planetary gear.
The hot air temperature is steplessly adjustable and electronically controlled. According to
Rear guide roller
steplessly adjustable. The welding pressure is transmitted via a toggle lever to the
Pinch roller
HOT WEDGE
Front guide roller
C
B
Upper geomembrane liner
Adjustment screw
hot wedge
Lower geomembrane liner
D
B
E
A
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