Specifications

58
The Hot-One System
D-M-E Runnerless Molding Systems
Balanced flow pattern
The Hot-One Manifold
To ensure an equal fill of all cavities, D-M-E 's hot-runner
specialists design most manifolds so that each melt
channel has the same flow length and pressure drop
from the machine nozzle to the gate.
This ensures natural rheologically balanced flow chan-
nels producing the lowest shear stress which results in
maximum productivity and molded product integrity.
D-M-E manifolds are compact and can make use of
tubular heaters featuring a uniform temperature profile
along their length.
Each manifold is finished to specific internal diameter
requirements based on shot size, resin type, and pitch.
This allows the manifold to more accurately perform to
your specific application.
Terminal mounting boxes:
provide the easiest and most economical
method of mounting power and
thermocouple connectors on the mold.
Each box is pre-cut and drilled for quick
mounting of the connector to the box, and
box to the mold.
Available in 15 and 30 Amp. version for 5,
8 and 12 zone main frames. Connectors
to be ordered separately.
Nozzles:
a large array of sizes and
designs, with many different
gating types, different materials
and heater styles. With the
modular concept “sub-assembly
plus tip”, hundreds of combina-
tions are possible, and all kinds
of thermoplastic materials have
been successfully injected.
Tubular heaters:
pressed into place in a precisely machined
groove on both faces of the manifold, for uniform
temperature, fast warm-up with moderate speci-
fic power for improved economy and long heater
life. The heater groove is kept shallow to allow
an excellent heat distribution combined with a
reduced manifold height. Moreover, the tubular
heater is accurately shaped according to the
contour of the manifold.
Reflector plates:
reflector plates are used on manifolds
fitted with tubular heaters to reduce
heat losses and provide a more
uniform temperature whilst avoiding
the costly operation of casting the
heaters in the grooves. Also,
replacement is easier in the rare
event of heater failure.
Thermocouples:
thermocouples are of the J-type and designed to
respond fast to the slightest temperature fluctuation.
They are also strategically located to achieve the
best temperature control. The number of thermo-
couples and thus of control zones will depend on the
shape and on the total installed power, keeping in
mind the maximum current allowed per zone (15 A or
30 A depending on the control modules) and an even
distribution of the load per phase.
Support blocks:
support blocks and riser pads
are supplied at choice in steel
for easy machining or in
titanium for better insulation
and temperature uniformity.
Insulating plate:
for reduced heat losses.
Asbestos-free, high hot
compressive strength and
longer life.
D-M-E provides upon request
the fully machined manifold
plate(s), top clamp plate and
risers with the required
pockets, water lines, wire
channels, and asbestos-free
insulating board.
Manifolds:
quality tool steel adapted to the applica-
tion, with balanced flows as required.
Streamlined melt channels with carefully
machined bends in the end plugs. Two
types of heaters are available; cartridge
or tubular, for increased design flexibility,
and optimal performance.