Kunststoffschweißtechnik
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: http://www.widos.de
Email: [email protected]
18.04.11
Working Instructions WIDOS HRG 16, Segment
Page 14 of 50
3. Functional description
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 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 !
The plastic pipes are clamped in the clamping rings.
If the pipe ends are not plane and parallel, the front sides of the pipes should be cut plane and
parallel by means of a
planer
and the misalignment of the pipes is to be checked.
Then the heating element is inserted and the pipes are pressed against the heating element
under defined adjusting pressure. This process is called
"adjusting"
.
After the prescribed bead height being reached, pressure is reduced, the
heating time
begins. The function of this time is to heat up the pipe ends.
After expiration of the heating time, the slides are opened, the heating element is removed
quickly and the pipes are driven together again.
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.
Heating element heats the pipe
up to welding temperature
Finished welding with
internal and external bead
