Kunststoffschweißtechnik
Starting
and
operating
Chapter 5
23.09.2014
Working Instructions WIDOS Miniplast / 2 IR
Page 21 of 43
5.2. Welding
process
B a s i c a l l y , t h e r e s p e c t i v e l y v a l i d w e l d i n g g u i d e l i n e s h a v e t o b e
r e s p e c t e d ( I S O / C E N / D V S . . . ) .
Screw in the reduction inserts according to the outer diameter of the pipes to be welded,
and mount them with pan-head screws.
Activate the control unit, thus the heating element is heated to the adjusted temperature. If
necessary readjust the welding temperature by the regulator (chapter: 4.4.1).
Do wear safety gloves as protection against combustion.
A stop-watch must be available to record the actual times for heating up and cooling.
A welding table must be available from which the parameters for the pipe dimensions to be
welded prescribed by the welding prescriptions may be taken.
Open the clamping tools. Put the pipes with same overhang inwards into the clamping tools
(at least 10 mm), shut the clamping tools and tighten the pipes by the clamping nut.
Insert the manual planer between the ends of the workpieces, lock it by turning the star grip
on the guide bar and start it by pressing pushbutton (chapter:
Fehler!
Verweisquelle konnte nicht gefunden werden.
).
Shut the machine by the hand wheel and carry out planing of the workpieces in a plane and
parallel manner.
In case of infrared welding it is
necessarily
required to plane up to limit stop.
Open the machine by the hand wheel again and deactivate the planer motor afterwards.
Remove the planer and put it into the reception box.
Remove the produced chips without contacting the treated surfaces.
Lying-about chips may get jammed within the machine and lead to malfunctions.
Join the pipes by the hand wheel.
Check pipe mismatch and gap on the joining pipe ends.
According to DVS 2207, the mismatch on the pipe outer side must not exceed 0.1 x pipe
wall thickness, the admissible gap must not exceed 0.5 mm.
The mismatch compensation is carried out by further tightening or releasing the clamping
nuts. In case mismatch compensation was carried out, planing must be repeated
afterwards.
Make sure that everything is absolutely clean in order to avoid any contact
between the cuttings and the heating element. Thermoplastic synthetic materials
will be thermally decomposed and can thus cause damages to the machine as
well as present serious health risks (polymer fever!).
Open the pipe ends again by the hand wheel.
The adjustment force for the pipe dimension to be welded can be gathered from the welding
table. Add the movement force.
