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HPS-III-Heißkanalsystem_Instandhaltung-Düsenspitzenwechsel_BA_V-2-0_EN
7.4.9 Installation of two-piece nozzle tips
1. The contour plate must be deinstalled.
2. Apply a thin and even coat of engineer's blue (see chap-
ter „5.3.1 Tools and operating materials“) to the contact
surface (surfaces T) of the cold nozzle tip (pos. 1.3) and
the nosepiece (pos. 1.4).
3. Slide the nozzle tip (pos. 1.3) carefully and without tilting
into the pressure tube (pos. 1.1) up to the stop.
4. Apply high temperature installation paste (see chapter
„5.3.1 Tools and operating materials“) to the thread of
the nosepiece (pos. 1.4 / surface G).
Attention: Surfaces where engineer's blue is applied
must not get in contact with the installation paste be-
cause otherwise the transfer of the blue is falsified.
5. Slide the nosepiece (pos. 1.4) carefully over the nozzle
tip, screw it into the pressure tube and tighten with the
matching tightening torque. See chapter
„9.3 Tightening torques for tip inserts“.
6. Unscrew and deinstall nosepiece (Pos. 1.4) and nozz-
le tip (pos. 1.3) again and check the transfer of the
blue. The surfaces T between nozzle tip (pos. 1.3) and
pressure tube (pos. 1.1) as well as between nosepiece
(pos. 1.4) and nozzle tip (pos. 1.3) must show an even
ring-shaped transfer of the blue.
7. Clean all surfaces from engineer's blue.
8. Heat up nozzle to 220 °C (428 °F).
9. Apply high temperature installation paste to the thread
of the nosepiece (surface G) again. Install nozzle tip
(pos. 1.3) and nosepiece (pos. 1.4) again as described
under 3. and 5. First, screw in the nosepiece (pos. 1.4)
hand-tight (< tightening torque) and wait until both parts
have reached the nozzle temperature. Then tighten with
the matching tightening torque. See chapter „9.3 Tighte-
ning torques for tip inserts“.
10. Let the nozzle cool down before carrying out further work
steps.
Picture 53: Installation of nozzle tip
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Picture 54: Nozzle tip installed
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Picture 55: Tightening of nozzle tip with matching torque
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Maintenance
When nozzle tips of HPS III nozzles or HPS III-SXE single tips are
exchanged while the nozzle is installed in the mould a lock against
rotation (dowel pin, pos 1.10) must be installed.
NOTE!
Sharp edges and heavy components
•
Cut injuries to body and extremities, mainly to the hands.
•
Crushing of fingers or hand.
Hot surfaces
Burns to the body caused by hot surfaces.
WARNING!
