12
P359mane.fm
7.7
Seal - Control
A regular control of the seal is necessary. The seal can be examined visually.
Make a seal, peel it apart and examine it as follows:
Correct seal
The seal must be completely welded over the whole width of the strap
on a length of approx. 25 mm. Minor quantities of fused plastic may
overflow on sides.
Welding time too short
The plastic strap is not welded over the whole width of the strap. The
seal efficiency is insufficient.
Warning! Straps with insufficient seal strength must be removed from
the package!
Adjust the welding time (see 5.4.2).
Welding time too long
If the welding time is too long the straps are overheated. The fused
plastic overflows on both sides of the straps. The seal efficiency is
affected.
Warning! Straps with insufficient seal strength must be removed from
the package!
Adjust the welding time (see 5.4.2).
8
PNEUMATIC SCHEMATIC
P
7
8
9
2
14
12
17
a
1
11
10
13
15
16
18
19
c
5
6
b
3
4
1
Tensioner valve
2
Welding start valve
3
Throttle
4
Throttle
5
Reversing valve
6
Exhaust silencer
7
Cooling time valve
8
Welding cylinder valve
9
Welding motor valve
10 Shuttle valve
11 Tension force control valve
12 Welding time valve
13 Exhaust silencer
14 Welding cylinder
15 Diaphragm valve
16 Diaphragm valve
17 Air motor
18 Exhaust silencer
19 Exhaust silencer
a
Tensioner valve lever
b
Welding valve lever
c
Manual - Automatic switchover
