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 |
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5.2mm
Round
Speed Welding Nozzle[model:A] |

Hot-Air
Welding
Welding is used for
polypropylene, polythene, PVC and
polycarbonate. The
welding rod must be of the same
material.
Ensure that the speed
welding nozzle is clean with
sharpcutting edges.
The parts to be welded must
be supported in place and
blocked to ensure
air cannot escape through the seam.
The welding nozzle should be
held so that the air slot
is parallel with
the seam to be welded. At the end of
the weld, the rod
is cut with the cutting edge by means
of a twist of the
wrist. The shoe at the end of the
nozzle should force
the softened welding rod into place.
(fig 9)

To weld slowly, set the heat
to a lower setting.
To finish off an awkward or
unsightly weld, the excess
material can be cut
away with a stanley knife, ground
away with a file or
tooled using the gun and a cold
screwdriver or
chisel.
Speed Welding
The use of speed welding
tips on our hot air tools
increases the both
the concentration of hot air and the
amount of profile
welding material that can be deposited
in one pass.
Generally, welding with this method results
in welding speeds
up to 15 times faster than pendulum
welding. The
welding process itself, as shown below, is
the same as the
pendulum method with the exception that
the speed welding
nozzle is used to guide the rod onto
the welding
joint.

Plastics
Recognition
Take a small sliver or
shaving of the material to be
welded and light it
with a flame, observe and smell the
smoke.
-
For PVC:
blackish smoke and acrid smell.
-
For
Polyethylene (PE): no smoke, the melted
material drips like candle wax and smells of
wax.
-
For
Polypropylene (PP): no smoke, the melted
material drips like candle wax and smells of
burnt oil.
-
For
Polyamide (PA): no smoke, melted material
pulls to form a thread and smells of burnt horn.
-
For
Polycarbonate (PC): yellowish sooty smoke,
sweet smell.
-
For ABS:
blackish smoke, sooty flakes, sweet
smell.
Welding Rod types & Suggested Welding
Temperatures
|
Plastic Welding Material
|
Suggested Temperature (°C)
|
|
Hard PVC rod
|
300
|
|
Soft PVC rod
|
400-500
|
|
Hard PE rod
|
300
|
|
Hard PE tape
|
300
|
|
Soft PE rod
|
270
|
|
Soft PE tape
|
270
|
|
PP rod
|
300
|
|
PP tape
|
300
|
|
PA rod
|
400
|
|
PC rod
|
350
|
|
ABS rod
|
350
|
|
ABS tape
|
350
|