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: www.widos.de
Email: [email protected]
20.08.2014 Working
instructions
WIDOS 4000 WM
Page 19 of 68
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 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 !
First the clamping tools are fixed onto the machine.
For welding angles and bows the clamping tools might be displaced on both sides.
The plastic pipes are clamped by means of the clamping tools.
After this the front sides of the pipes are planed parallel and the misalignment of the pipes is
checked.
Then the heating element is driven inside and the pipes are pressed onto the heating element
under the defined pressure (this process is called:
„adjustment time“
).
After reaching the prescribed bead height the pressure is being reduced and this is the start of
the
heating time
.
The function of this time is to bring the pipe ends onto the welding temperature.
After completion of the heating time the machine is opened the heating element quickly driven
out and the pipes are again driven together hydraulically.
The time gap from driving out the heating element to the joining of the pipes is called
change
over time
.
They are put together with the prescribed welding pressure and then cool down under
pressure (
cooling time
).
The welding connection can now be unclamped: the welding process is completed.
Welded pipe with inside
and outside bead.
Heating element heats
the pipes up to welding
temperature.
