UH-02-Aug16-ENG P 12 / 21
- Wires cannot be added without YUDO technical opinion.
- Plugs and their electrical box must be placed in order to be protected from strokes or other accidents that
may damage the set.
- The plugs must always be placed in appropriate boxes. The use of inappropriate boxes is the cause of many
electrical failures and system malfunctions.
25. After finishing the assembly, check if there is no undue electrical current passage and if continuity is doing
in the right poles.
26. Normally thermocouples give electrical current passage to the mold, but not resistances.
27. The ground wire must always be connected.
28. Check the heating system: Heat the system at 150 ° C, stabilize the temperature of all electrical areas and
keep heating for 10 minutes.
- Always use soft start (slow heating)up to the temperature of 100 ° C.
29. Check the correct Valve Pins movement by activating the respective cylinders (only for valve gate
systems).
30. Let the system cool down.
31. Keep the system in a place free of moisture, metal chips or under possible physical shocks. Other care
considered suitable will be important to keep the system in good working order.
YUDO provides hydraulic and pneumatic systems but each one only work correctly with the drive specified in
the project. Do not test pneumatic systems with oil or vice versa.
Any anomaly detected in the system must be reported to YUDO.
Disassembly
1. Remove center ring
2. Remove cylinder cover (when applicable)
3. Remove valve pins (when applicable). In case the runner channels have plastic in, heat up the system up to
meting temperature and then pull out the valve pins.
4. Let the system cool down and proceed after system temperature is below 50 ° C.
5. Remove the clamping plate of the mold (plate 1), and the insulation plate when applicable.
6. Find the eyebolts placement points in the manifold (points of eyebolts that offer more resistance). Put in two
of these points which are spaced apart (when applicable)
7. Lift the system until it back off 50 mm.
8. If the system is balanced continue until it is completely out of the mold.
9. If the system is unbalanced, change the position of eyebolts to balance. After the system has already back
off of the housing 50 mm, already can use points of eyebolts off the manifold.
10. Place the system slowly on suitable surface. Take into account that the system has many hot spots that
can be easily damaged. It is recommended that this is placed upon easels seating only the manifold.
Any anomaly detected in the system must be reported to YUDO.
Assembly after operation
System Assembly after operation and with channels full of plastic is identical at all points except:
- Before introducing the valve pins, the system must be heated to the melting temperature of the plastic
material that is inside the system. Warning: molten material will come out by the tips of the nozzles.
-If there is difficulty in introducing Valve pins, in order to stabilize the temperature is recommended to increase
temperature 10 ° C more for 10 minutes.
- If, after this process, the valve pins do not enter with a 70 kgf force, do not force. In this case, there is some
anomaly that must be identified and corrected.
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