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HPS-III-Heißkanalsystem_Instandhaltung-Düsenspitzenwechsel_BA_V-2-0_EN
7.4.7 Installation of one-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 of the cold nozzle tip (pos. 1.9 / surface T).
3. Apply high temperature installation paste (see chapter
„5.3.1 Tools and operating materials“) to the thread of
the nozzle tip (pos. 1.9 / 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.
4. Screw the nozzle tip (pos. 1.9) into the pressure tube
(pos. 1.1) and tighten with the matching tightening
torque. See chapter „9.3 Tightening torques for tip
inserts“.
Important: Before installing a valve gate nozzle tip
the valve pin must be moved to position „open“.
5. Unscrew and deinstall the nozzle tip again and check
the transfer of the blue. The surface T between nozzle
tip (pos. 1.9) and pressure tube (pos. 1.1) must show an
even ring-shaped transfer of the blue.
6. Clean all surfaces from engineer's blue.
7. Heat up nozzle to 220 °C (428 °F).
8. Apply high temperature installation paste to the thread
of the nozzle tip (surface G) again. Install nozzle tip
(pos. 1.9) again as described under 4.
9. Let the nozzle cool down before carrying out further work
steps.
Picture 46: Installation of nozzle tip
z352-14
Picture 47: Tightening of nozzle tip
z352-15
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!
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