Kunststoffschweißtechnik
WIDOS
Einsteinstr. 5
Phone +49 / 71 52 99 39 - 0
W. Dommer Söhne GmbH
D-71254 Ditzingen-Heimerdingen
Fax
+49 / 71 52 99 39 - 40
info
@
widos.de
Website: www.widos.de
14.01.2015 Working
Instructions
WIDOS 4002 S CNC 3.0
Page 15 of 92
3. Description of process
B a s i c a l l y , t h e i n t e r n a t i o n a l a n d n a t i o n a l p r o c e s s g u i d e l i n e s a r e t o
b e f o l l o w e d !
At first, the clamping tools are mounted on the slide.
For welding angles and bends, the clamping tools can be turned on both sides.
The plastic pipes are clamped by means of the clamping tools.
Then the front sides of the pipes are planed parallel and the misalignment of the pipes is
checked.
Now the heating element is swiveled in and the pipes are pressed against the heating element
under defined adjusting pressure (this process is called
"adjusting time"
).
After the prescribed bead height being reached, pressure is reduced, the
heat up time
begins.
The function of this time is to heat the pipe ends up to welding temperature.
After expiration of the heat up time, the slide is opened, the heating element is removed
quickly and the pipes are closed again hydraulically.
The time gap from the removal of the heating element to joining the pipes is called
change
over time
.
The pipes are joined under prescribed welding pressure and then cool down under pressure
(
cooling time
).
The welded joint can be unclamped, the welding process is finished.
welded pipe with
internal and
external bead
Heating element heats
the pipes up to
welding temperature.
