The CoMo Injection system from
Kistler Instruments uses cavity
pressure to monitor and control the
injection process. The system has
now been extended with the addition
of the MultiFlow option to provide
automatic hot runner balancing
Cycle by cycle, CoMo Injection
with MultiFlow monitors the
pressure profile of each cavity of a
hot-runner mould from injection,
through compression and holding, to
the cooling phase. During the
injection and holding pressure
phases, the software analyses the
pressures curves in all cavities. The
system automatically calculates the
optimal set-point temperature for
each hot runner tip, which is then
transferred via an interface to the hot
runner controller. The mould is
automatically balanced during
process start-up, and continuous
optimisation keeps it stable during
production. The CoMo Injection
continuously monitors the quality of
parts produced and signals any need
for automatic separation of rejects.

Hot-runner balancing eliminates the
need for time-consuming manual
optimisation and adjustment.