widos 4000 WM, Working Instructions Translation

Page: 37 / 87

Kunststoffschweißtechnik
Starting and operating
Chapter 5
20.08.2014 Working instructions WIDOS 4000 WM Page 37 of 68
5.3.6. Heating-up

After reaching the prescribed revolving bead height reduce the pressure, therefore release
the star screw: < > until the heating pressure has reduced almost to zero (
≤
0,01
N/mm²).

Now the heating time begins. Press the stop watch and compare actual time with the target
time taken from the table.

Necessarily retighten the star screw < > still during heating.
5.3.7. Change-over

After the heating time has elapsed, open the machine tables with button: < > until the
heating element is detached from both pipe ends.

Then, as fast as possible, move the heating element to the rear manually.

Then drive the pipes shock-free together with the cooling pressure via button < > until
the pressure is displayed at the pressure gauge. Turn the pressure relief valve < >
until the added pressure is shown on the pressure gauge (cooling pressure = bead-p
pressure).

The maximum time frame for this process is specified by the value for the change-over time
taken from the table.
5.3.8. Joining

After the welding pressure build-up press the stop watch and keep button < > pressed
for about 10 seconds in order that the hydro memory can fill up.

Press the stop watch.

After the cooling time has elapsed, release the pressure, therefore release the star screw:
< >.

In case welding has been carried out with additional cylinder, now remove the cylinder and
put it on its holder at the left side of the machine.

Release the clamping nuts and manually take off the upper clamping tools.

Take out the welded pipe.

Open machine tables with button: < > to the right.
W e l d i n g i s c o m p l e t e d .