ViscoTec preeflow 21168, Руководство по эксплуатации и техническому обслуживанию

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21 / 36 INST-002742 / B eco-DUO600
with the name of the tester, date and time.

Fit static mixer (24).
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Carry out at least one purge shot.
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Start dosing process via the dosing control unit.
4.3 Recommendations for problem-free operation
These experience values apply for a wide variety of dual-component materials. Always
follow the manufacturer recommendations for your material in addition to these.
Mixing ratio for very short dosing times
Dual-component media display mostly varying properties (viscosity). They therefore emerge
from the outlet openings with different pressures. This means that deviations in the mixing
ratio can usually be noted at the start of dosing. Selecting a suitable mixing pipe is essential
to the result.
Suck-back with dual-component materials
Suck-back ensures a clean thread break. If it is set too large, already mixed material enters
the dosing pumps, causing them to react with each other. The max. suck-back volume is
saved in the dosing control unit.
Note the pot life
During work breaks, purge shots prevent the mixed materials from hardening in the mixing
pipe. The mixed materials are completely exchanged in the mixing pipe by the purge shot.
A purge shot interval can be stored in the dosing control unit. The purge shot interval must
be set so it is shorter than the pot life. This measure is not suitable for longer interruptions to
production.
OPERATION