EWIKON HPS III, Operating Manual

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108 HPS-III-Heißkanalsystem_Instandhaltung-Düsenspitzenwechsel_BA_V-2-0_EN
7.4 Installation / deinstallation of nozzle tips
7.4.1 Safety instructions
CAUTION!
Pay attention to system temperature during installation/deinstallation
Damage to melt seal.
• The contour plate must only be installed and deinstalled when the hot runner system has cooled down.
• If the nozzle temperature is too high when the contour plate is installed/deinstalled the melt sealing can be
damaged. This can cause leakage of the system.
Problems during deinstallation of nozzle tips
Damage of nozzle tips
• If a nozzle tip can not be screwed out use the controller to raise the nozzle temperature in steps.
• If the nozzle tip is still not screwable please contact the EWIKON customer service. See chapter „7.7 Inst-
ructions for service and repair“.
Cleaning of threads and sealing surfaces
Damage to sealing surfaces during installation.
• Threads and sealing surfaces must be checked on cleanliness and free movement.
• Clean sealing surfaces and threads by using suitable cleaning tools (best directly after deinstallation of
nozzle tip when the plastic is still viscous). Appropriate cleaning tools (brushes, scraper) must be made
of materials which are softer than the steel of the hot runner components (soft metals or brass), also see
chapter „5.3.1 Tools and operating materials“. Hereby, the sealing surfaces and threads can not be damaged
during the cleaning process.
Maintenance
WARNING! PPE
Hot surfaces / hot material (plastic melt)
Body burns by hot surfaces.
• Let the HPS III hot runner system and all components cool down completely to
ambient temperature before starting maintenance work / disassembling. Never
touch material leaking from the nozzle/the mould/the hot runner or the material
inlet. Even material that seems to be cooled down already may still be hot inside
the core and cause burns.
• Please make sure you wear your personal protective equipment (PPE)