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HPS-III-Heißkanalsystem_Instandhaltung-Düsenspitzenwechsel_BA_V-2-0_EN
7.4.8 Deinstallation of two-piece nozzle tips
1. To carry out a nozzle tip exchange while the nozzle is
installed inside the mould deinstall the contour plate
(pos. 56) in cold condition. For a nozzle tip exchange
outside the mould clamp the nozzle in a vice (see Pic-
ture 42) and connect it to a controller.
2. Heat up nozzle (pos. 1) to 220 °C (428 °F).
3. Unscrew the nosepiece (pos. 1.4) from the pressure
tube (pos. 1.1) by using a ring wrench (see chapter
„5.3.1 Tools and operating materials“).
4. Grip the shaft of the nozzle tip (pos. 1.3) with a pair of
pliers and pull it out of the pressure tube with slight rota-
ry motions. Proceed carefully to avoid damage.
5. Clean nozzle tip (pos. 1.3) and nosepiece (pos. 1.4)
thoroughly by using a brass wire brush (see chapter
„5.3.1 Tools and operating materials“). If necessary use
a hot air gun. The temperature must not exceed 400 °C
(752 °F).
6. Check all surfaces for cleanliness. All contact surfaces
at the pressure tube (pos. 1.1), nozzle tip (pos. 1.3) and
nosepiece (pos. 1.4) should be metallic bright.
Picture 48: Disassembly of contour plate (HPS III-S nozzle)
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Picture 49: Disassembly of contour plate (HPS III-SXE single tip)
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Picture 50: Unscrewing of nose piece
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Picture 51: Nose piece removed
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Picture 52: Disassembly of nozzle tip
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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!
