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Fully Automated Dispenser
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With more than 35 years of experience in the cast
polyurethane industry, and by
employing state-of-the art computer and instrumentation
technology, we have developed
a polyurethane metering and mixing machine that
consistently delivers quality cast elastomers.
StateMix urethane dispenser can be set up easily and
are capable of metering and mixing
various polymers such as MDI, TDI and rotational casting
systems.
The heart of our innovative design is the interaction
of Coriolis mass flow sensors, and
precision metering pumps with digital motor drives, all
of which are monitored and controlled
by the main computer.
By connecting these instruments and taking advantage of
the latest technology in networking
systems, we have designed and manufactured a reliable and
rugged dispenser with an impressive
accuracy.
Since almost all components of our system are off-the-shelf
products, maintenance and
up-keep of this machine is greatly simplified and made more
economical.
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General outline of the main components of the StateMix dispenser
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Pump Assembly
The pump assemblies in the StateMix dispenser consist of
a
positive displacement limiter and a DC motor.
Our pumps are carefully selected off-the-shelf products,
which provide uniform,
pulseless flow under varying conditions
of pressure, temperature, and viscosity. By using
different pump
sizes,total flow rates of
0.1 lbs. to 80 lbs. per minute are achived.
Each DC motor is connected to its' own motor
drive and each
motor drive continuosly
receives updated information from its'
mass
flow meter and adjusts the pump speed to
maintain the
set flow rates.
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Mixing Head
Our dynamic mixing heads are designed with
ease of operation
and simplicity of maintenance in mind.
Up to 6 streams including flush and dye can be introduced
to the mix head
simultaneously. We have taken steps to minimize
the number
of moving parts. seals, and bearings in the mixing
head.
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Mass Flow Meters
Coriolis mass flow meters are one of the most
critical components
of the Statemix dispenser,
as they insure reliable mass measurem
ent of each
component.
Because we measure mass flow
of individual components not
their volume
flow, the accuracy of the mix is independendent
of
pressure and temperature in the system.
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Main Computer
The main computer is also an off-the-shelf
industrial processor which
provides operator
interface as well as monitoring and controlling
all
main functions of the system. To begin the
pour, all the operator has
to do is to enter
the desired ratio and total flow rate. From
this point the
cmputer will take over, calculate the
flow rate of each individual compo
nent, start
the pumps, and establish the feed-back loop
between mass
flow meters and the motor drive
while all streams are being re-circulated
to their
respective tanks.
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Tanks and Heating chambers
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All tanks are individually heated with their
own air or electric driven agitators.
Our tanks vary in size from 5 to 110 gallons.
The heating system on each tank consists of a multiple
number of low wattage heating coils wrapped around the tank,
providing consistent heating of the material inside the tank.
All lines, valves, manifolds, pumps and mass flow meters
are located in closed insulated chambers and heated by forced air
and controlled by separate PID temperature controllers.
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Site Updated by Milorad M
Pump Assembly