Buhnen HB 700, Руководство по эксплуатации

Страница: 13 / 20

1
6.2.1 Cleaning the nozzle
• Wipe the nozzle with a cloth to remove slight external dirt.
• To remove blockages insert a drill bit, needle or wire of suitable diameter into the
nozzle orifice.
In stubborn cases replace the nozzle (see Section 6.3).
6.3 Nozzle systems
HB 700 HB 700 Spray
Valve seat (A6)
Cheese-head screw (A5)
Protection cap (A4)
Serrated ring (A3)
Nozzle end (A2)
Cone nozzle (A1)
Melting tank (B7)
Protection cap (B6)
Ball (B5)
Pressure spring (B4)
Swirl nozzle (B3)
Air cap (B2)
Cap ring (B1)
Fig ./1: Nozzle systems in detail
6.3.1 Replacing the cone nozzle (HB 700)
Tools needed
• 2 open-end spanners size 19
1. Fix the nozzle end (A2) by locknut and unscrew the cone nozzle (A1).
2. Screw the new cone nozzle on hand-tight to begin with.
3. Allow the cone nozzle to heat up for approx. 2 min.
4. Fix the nozzle end by locknut again. Screw the new cone nozzle on firmly (without
using force).
6.3.2 Replacing the nozzle end (HB 700)
Tools needed
• 2 open-end spanners size 19
• 1 open-end spanner size 12
There must be no melt at all in the tank when the nozzle end is replaced.
Therefore discharge the melt completely, e.g. into a collecting vessel.
1. Disconnect the compressed-air supply.
2. Unscrew the cone nozzle (A1) (see Section 6.3.1).
3. Fix the valve seat (A6) by locknut using an open-end spanner size 12.
Screw the nozzle end (A2) out.
4. Screw the new valve seat on hand-tight to begin with.
5. Allow the valve seat to heat up for approx. 2 minutes.
6. Fix the valve seat again by locknut. Screw the new nozzle end on flush
(without using force).
7. Fit the cone nozzle (see Section 6.3.1).
Servicing/maintenance