EWIKON HPS III, Operating Manual

Page: 130 / 144

130 HPS-III-Heißkanalsystem_Instandhaltung-Nadelausbau_BA_V-2-0_EN
7.6 Deinstallation / exchange of valve pins
7.6.1 Drive units with pistons - deinstallation und exchange of valve pins
The procedure for deinstallation of the valve pin as described in the following is valid for the following drive unit versions:
• Drive unit integrated in clamping plate (version 1)
• Drive unit integrated in clamping plate (version 2)
• Drive unit placed on manifold (coupled)
• Drive unit placed on manifold (screwed-on) (version 1)
• Drive unit placed on manifold (screwed-on) (version 2)
The example shows a drive unit integrated in the clamping plate.
Maintenance
Connected power supply during installation
Risk of deadly electric shock or severe injuries due to live compo-
nents.
• The hot runner system and the mould have to be disconnected
from the voltage source during installation.
HAZARD!
Pressurised systems
During installation all hydraulic or pneumatic supply lines must be de-
pressurised.
•
Injuries caused by flying parts or "whipping" hoses.
• Injuries to eyes caused by escaping pressurised liquids.
Hot surfaces
Burns to the body caused by hot surfaces.
WARNING!
Picture 109: Dismantling of screw by using a tubular hexagon span-
ner
z342-21
1. Switch on the mould cooling and heat up the hot runner
system to processing temperature.
2. Insert tubular hexagon spanner (pos. a, see chapter
„5.3.1 Tools and operating materials“) into the hexagonal
cutout in the piston (pos. 7.3) and hold it in position by
using a wrench to avoid rotation of the piston (pos. 7.3).
3. Insert the allen key (pos. b, see chapter „5.3.1 Tools
and operating materials“) through the tubular hexagon
spanner (pos. a) to unscrew and to dismantle the screw
(pos. 7.6).