
CAUTION
Heat sensitive materials should be purged from the system prior to
maintenance. Failure to do so may result in degradation of material in the
system.
When heating the Hot Runner system for maintenance, mold cooling should
be on to protect seals and O-rings.
For systems with Accu-Valve EX, Accu-Valve MX or Accu-Valve CX gate
seals:
Gate seals must be removed prior to removing or re-installing valve pins.
If material is present in the mold, raise nozzle temperature enough to allow
removal or installation of the valve pin. However, nozzle temperature should
not be high enough to allow excessive material flow from the nozzle into the
thread area.
After installing valve pins thoroughly clean the nozzle seat and thread area.
Actuator units should be inspected every 12 months or according to the
pre-determined maintenance schedule.
CAUTION
The following procedures are performed on a bench.
10.13.1 For Oil Systems:
1. Remove oil from system.
2. Remove the cylinder top with tool in upright position to prevent oil from
entering the system.
3. Heat up the system (required to remove the valve pin).
10.13.2 For Pneumatic Systems:
1. Remove the cylinder top for every zone.
2. Heat up the system (required to remove the valve pin).
3. Install the cylinder extraction tool to assist with the removal of the cylinder.
4. Disassemble the system.
5. Inspect components.
6. Replace O-rings. O-ring replacement kit is OR550P1 for 5500 Series and
OR650P2 for 6X00 Series and 7100 Series.
7. When installing the rod seal, check that the rod seal is seated to the base
of the cylinder and is secured in place with the circlip.
8. To complete the assembly, refer to:
a) Cylinder bottom assembly
b) Piston assembly
c) Cylinder top assembly
d) Figure valve pin assembly
e) Installing the valve actuator to the hydraulic plate
Maintenance Procedures for 5500 Series, 6X00 Series
and 7100 Series - continued
10-21
HYDRAULIC / PNEUMATIC ACTUATORS
Hot Runner User Manual
© 2020 Mold-Masters (2007) Limited. All Rights Reserved.
Содержание Hot Runner
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