Leister ASTRO Manual De Instrucciones página 17

Test Weld
• WARNING: Welding parameters must be verified by means of test welds before the welding operation is
performed.
• Perform test weld as per the welding instructions of the material manufacturer and national
standards, directives or start parameters as shown in the table.
1.5
420 °C
5.0 m/min.
1250 N
Welding
• Check: – Drive/ Pressure rollers (20/21) as well as the hot wedge (8) must be clean before
engaging into the geomembrane liner or film.
– Cable length/Cable guide.
• Adjust welding parameters, see page 15.
• The welding temperature must be achieved.
• Guide and position the automatic welding machine into the over-lapped geomembrane liner or film.
• Switch on drive motor with
• Pull the lever (9).
Beginning of welding process
• Check the welded seam (wash/seam thickness reduction). As required, adjust the welding speed with
+
–
keys on keyboard (6).
• The automatic welding machine is guided along the overlap with the carrying handle/guide handle (12), so that
the frontal width of the overlap is kept within the 22mm zone (see illustration F).
Illustration F
15 Foil guide
21 Upper drive/pressure roller
(a 50 mm or 45 mm)
23 Chain guard of lower part
b Max. frontal width of overlap
a 50 mm = b 22 mm
a 45 mm = b 24.5 mm
End of welding process
• Release the tension lever (9) 1 cm before the end of the welded seam.
• Switch off the drive motor with key
+
keys on the keyboard (6) simultaneously.
After completion of the welding work, allow the hot wedge (8) to cool down and
230
remove the power supply cord from the mains socket.
400
HD - PE (material thickness in mm)
2.0
420 °C
4.5 m/min.
1500 N
key on keyboard (6).
M
M
on the keyboard (6). Switch off the heat-ing by pressing the
2.5
420 °C
4.2 m/min. 4.0 m/min.
1500 N
21
15
23
Overlap welding
3.0
420 °C
1500 N
a
b
H
and
17