CPT International 02/2021

MOLD AND COREMAKING
Table 1 clearly shows: in the case of
reducing the heat loss by 50 %, the
energy consumption can be effectively
reduced by 50 %, the curing efficiency
increased by 30 to 50 %, the amount of
catalyst reduced by 30 %, and the costs
of exhaust gas purification treatment
will decrease accordingly (the exhaust
system processing air volume is reduced
by 40 to 50%).
Figure 9: Completed finalization plan of the integrated heater.
Blow inlet temperature
Conclusion
This paper studies the high-efficiency
blowing and curing technology of the
core-making machine. It integrates heat
exchange principles, curing process
principles, and advanced integrated
design concepts. Afinite element digital
analysis model of the heater is established.
Through multi-dimensional analysis,
the finalized heater is also
established. Design parameters, and
likewise, test quantification and production
verification of the finalized
heater yield the following results:
> Reduced energy consumption by
more than 30 %
> Reduction in the amount of catalyst
by more than 30 %under the organic
process
> Curing efficiency increase by about
50 %
> Exhaust gas treatment air volume
reduction by more than 50 %under the
organic process conditions
www.mingzhi-tech.eu
Yang Linlong, Xu Leilei, Suzhou Mingzhi
Technology Co. Ltd. Suzhou, China
Blowing times
Organic process
Inorganic technology
Figure 10: Blowing inlet temperature curve of the integrated solution.
Figure 9represents the finalized
plan of the integrated heater, which has
been applied to the production test
verification of the Mingzhi MiCC300
integrated intelligent core-making unit.
Almost 200,000 molds of sand core have
been manufactured with no process failures.
The blowing inlet temperature of
the organic process can be above 150 ℃.
Inorganic process blowing inlet temperature
is above 200℃ (blowing pressure
is 3bar, blowing flow isabout 1200 l/
min);
Figure 10 shows the blowing inlet
temperature curve of the integrated
solution. During the entire high-efficiency
curing period (within 30 s), the
blowing inlet temperature of the integrated
heater shows improved capability
to remain constant. The blowing inlet
temperature over 30 sshows adownward
trend, with adecrease of about 5
%, which reflects that the heater‘s heat
capacity, heating power and other parameters
are well designed and result in
good performance.
Verification results
The data obtained through the production
test verification and summarized in
40