KTM Mould had designed , built and produced
many high quality hot runner moulds . we are
experienced in building a variety of hot
runner moulds like as follow brand :
Hot runners are popular in high production
parts , especially with
a lot of cavities
and the advantages of hot runner moulds are
lower injection pressures .
lower clamping pressure .
no runners to disconnect from the moulded
shot size is reduced by runner weight .
nozzle freeze and sprue sticking issues
cleaner moulding process ( no regrinding
necessary ) .
having no runners reduces the possibility
of contamination .
consistent heat at processing temperature
within the cavity .
no runners to remove or regrind , thus no
need for process / robotics to remove them .
cooling time is actually shorter ( as
there is no need for thicker , longer-cycle
runners ) .
However hot runner also have some
disadvantages , the cost is more expensive
than a cold runner , it requires costly
maintenance , and requires more skill to
operate . Color changes with hot runner
moulds can be difficult since it’s virtually
impossible to remove all of the plastic from
an internal runner system .