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HPS-III-Heißkanalsystem_Vorspann_BA_V-2-0_EN
Installation
5.4.2 Standard dimensions of hot runner systems
All given installation dimensions, fit sizes, form and location tolerances of the mould plates surrounding the hot runner
system have to be checked (for specifications please refer to the current catalogues on www.ewikon.com in the download
section and/or the attached order-related documents). An overview of all relevant dimensions is given in Picture 22.
Particularly the following dimensions have to be checked:
•
Check of the fit sizes in the tip sealing area / sealing collar of the tip insert and the installation contour of the mould plate.
•
Height dimensions (X dimension, thickness of the clamping plate) have to be checked.
•
Measuring of the mould plate: important for calculating the installation depth of the nozzle (X dimension)
•
Thickness of the nozzle retainer frame plate (at at least 2 different ends of the plate)
•
Installation depth for nozzle (from the contact surface of the nozzles to the top edge of the mould plate)
•
Installation depth of pressure piece with centering (from the contact surface of the pressure pad until its top edge)
•
Thickness of the manifold with screwed-in pressure pads H3 (from top side of pressure pad to nozzle sealing surface of
the respective nozzle)
•
Actual value of the gap dimension ΔS
•
Thickness of the clamping plate. If pressure pads are installed in the clamping plate they also have to be measured and
considered when calculating the gap dimension (special design).
This applies to systems with single nozzles in particular as only the locating ring fixes the single nozzle in the installati
-
on space. If there is a gap the injection pressure (pressure build-up around the cavity, if it is filled) causes the nozzle to
move back to the locating ring, possibly resulting in leaks.
5.4 Checks before installation
The HPS III hot runner system is subject to comprehensive testing by the manufacturer before delivery. For safety reaons
(transport or storage damage or damage to the hot runner system when preparing installation) we recommend that you
check the hot runner systems for damage just before installing it. To exclude any damage during installation all information
about checks which are part of this operating instructions must be adhered to.
5.4.1 Notes on mould layout
The following factors must be observed for the mould layout:
•
Installation notes for the mould design
•
Mould stability
•
Sealing of the hot runner system
•
Cooling
•
Material
•
Preload (calculation of gap dimension)
•
Check of gate diameter
NOTE!
See the EWIKON HPS III catalogue, chapter 5 "General assembly notes" , for a detailled description of general
assembly notes and mould layout. The current version of the catalogue can be found on www.ewikon.com in
the download section.
