Leister TWINNY T Instructions D'utilisation page 17

Welding
Beginning of welding process
• Check the welded seam (wash/seam thickness reduction).
as required, adjust the welding speed with keys
keyboard (4).
• The automatic welding machine is guided along the overlap
with the guide bar (30) or at the guide handle (16), so that the
frontal width of the overlap is kept within the 20 mm / 0,8 inch
zone (see illustration B).
End of welding process
• Release tensioning lever (11). Withdraw combination wedge (18) from the overlap and swing upwards.
• Switch off the drive motor with
Switch off heater with keys
Changeover of the heating system
Depending upon the materials to be welded, the heating system with a long or short combination wedge
should be employed.
Combination wedge long
• Application/guidelines
Depending on the material, possibly deviating
PE-HD, PE-C, PFA, PP material thickness of
PVC-P, PE-LD, ECB, EVA material thickness of 1.0 – 3.0 mm
• Contains three heating zones: pre-heating, contact heating, material plasticising
Through the combination of contact heat and hot air, the long combination wedge permits very good quality of the
welding seam and high welding speed.
Combination wedge short
• Application/guidelines
Depending on the material, possibly deviating
PE-HD, PE-C, PFA, PP material thickness of 0.3 – 1.0 mm
PVC-P, PE-LD, ECB, EVA material thickness of 0.5 – 2.0 mm
• Makes welding of films from 0,3 mm / 12 mil thickness possible
• In order to prevent thin materials melting onto the contact area, the material to be welded is carried by a hot
air cushion. Thus this has only brief contact with the combination wedge.
Work process
• Loosen four screws on the combination wedge (18).
• Install the new heating system.
• Lightly tighten screws.
• Drive combination wedge (18) between the drive/pressure rollers.
• Check: align combination wedge (18) in the pressure rollers (22/23).
• Tighten screws.
• Test–weld/check: The test channel must be in the centre of the welding seam.
• As required, adjustments can be made to the running–in depth of the heat ing system with the guide shaft set
screw (28), in order to run the test channel off–centre.
–
key on the keyboard (4).
M
and on keyboard (4) (by pressing them simultaneously).
+
H
0.8 – 2.0 mm
32 – 80 mil
40 – 120 mil
12 – 40 mil
20 – 80 mil
23
on
+
25
27
Max. frontal width
Illustration B
with test
channel
with test
channel
20mm
of overlap.
0,8 inch
without
test channel
without
test channel
17