Combination wedge short
Combination wedge long
with test
channel
with test
channel
without
test channel
without
test channel
• Application/guidelines
Depending on the material, possibly deviating
PE-HD, PE-C, PFA, PP material thickness of 0,8 – 2,0 mm / 32 – 80 mil
PVC-P, PE-LD, ECB, EVA material thickness of 1,0 – 3,0 mm / 40 – 120 mil
• 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.
• Application/guidelines
Depending on the material, possibly deviating
PE-HD, PE-C, PFA, PP material thickness of 0,3 – 1,0 mm / 12 – 40 mil
PVC-P, PE-LD, ECB, EVA material thickness of 0,5 – 2,0 mm / 20 – 80 mil
•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 heating
system with the guide shaft set screw (28), in order to run the test channel
off–centre.
• Maximum possible width of welding seam without test channel 50 mm / 2 inch
• Welding seam width, with test channel in accordance with DVS 2225 part I and
BAM
• Other dimensions possible on request.
Changeover of the heating system LEISTER Twinny T
Depending upon the materials to be welded, the heating system with a long
or short combination wedge should be employed.
9
