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Kunststoffschweißtechnik
Starting and operating
Chapter 5
18.04.11
Working Instructions WIDOS HRG 16, Segment
Page 24 of 50
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After expiration of the cooling time release pressure, valve lever on: “Pressure release”.
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Open the clamping tools and remove the welded part.
•
Open the slide, valve lever on: „BACKWARDS“.
W elding is completed .
5.5. How to weld angles
When angles have to be welded, the welding surface of the pipes and thus the necessary
pressure is changing.
The necessary pressure is calculated as follows:
•
Gather the prescribed value for adjusting or cooling pressure from the table.
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Multiply the pressure value with factor 1/cos (angle).
This produces the following factors:
Welding 15°
(Pipes chamfered for 7.5°): 1.01
Welding 22.5°
(Pipes chamfered for 11.25°): 1.02
•
Add the movement pressure as usual.
The other welding parameters remain as noted in the table.
Angle