CPT International 02/2021

MOLD AND COREMAKING
Photos and Graphik: Mingzhi Technologie Leipzig
Core Shooting
High-efficiency heater integrated into acore shooter. Usually, it is
installed separately from the machine.
Efficient curing process of the
core making machine
An integrated high-efficiency heater for acore making machine’s newest generation
improves the curing efficiency of the core making machine, reducing energy consumption
and creating catalyst material savings. The article features the development
method, value, and performance results, as well as afinite element analysis method to
improve the performance of the heater with an integrated design concept. The results
show that significant results have been achieved.
By Yang Linlong and Xu Leilei, Suzhou, China
Introduction
The gas generator (including gas heater,
abbreviated as heater) of the traditional
core making machine, widely used
in the foundry industry, isusually installed
separately from the equipment. Its
main function is to send high-temperature
gas or catalytic gas into the blowing
plate through hoses, joints, the
connecting plate, and into the core box,
resulting in the hardening of the sand
core.
Based upon research into the inorganic
and organic core curing process,
improving the heater‘s ability to continuously
provide high-temperature gas
is aknown challenge. Considering the
status quo and associated problems, the
development of high-performance heaters
can provide high-level efficiency
and energy savings.
With the current technology, the
high-temperature gas has alengthy
transport distance, great temperature
loss (up to 60% or more), high energy
consumption, and poor stability. Especially
among the conditions of the inorganic
curing process, the temperature
cannot be guaranteed, resulting in low
curing efficiency and high energy
consumption.
Status analysis
The schematic diagram of the traditional
generator scheme is revealed in
Figure 1, which shows the combination
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