Ku nst sto ffschweißtec hni k
WIDOS
Einsteinstr. 5
Phone +49 (0) 71 52 99 39 - 0
W. Dommer Söhne GmbH D-71254 Ditzingen-Heimerdingen Fax
+49 (0) 71 52 99 39 - 40
Website:
www.widos.de
Email: info@widos.de
03.03.2009
Working Instructions WIDOS PSM 15 with pneumatic clamping
Page 12 of 33
3. Functional description
A l l 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 b a s i c a l l y
f o l l o w e d !
By using the clamping beams the plastic sheets are clamped. Afterwards the position of the
sheets are checked and if necessary changed.
Now the heating element is swivelled in and the sheets are pressed on the heating element at a
defined pressure. This process is called
"adjusting"
.
The applied power can be seen on the range display you find on the machine.
Having reached the mandatory bead height the pressure is reduced, the
heating time
begins.
This time is used to reach the welding temperature at the sheet ends.
After the ending of the heating-up, the tables drive apart, the heating element quickly slews out
of the machine and the tables drive together again, we call this
change-over time
.
The sheets are joined at the needed welding pressure and cool down under pressure
(
cooling time
).
The welding joint can be clamped out and the welding process is completed.
Image of a heating element butt welding:
Heating element heats the
sheets up to welding
temperature
Completed weld joint with
bead on top and below
