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Dispensing PVA Adhesives
PVA
adhesives are usually low to medium viscosity
water based fluids
that bond wood, paper and card. They are
usually supplied in bulk size bottles or drums.
We can also supply your current PVA packaged in a
ready to use syringe or cartridge. Please
click
here
for details.
Syringe Dispenser.
Adhesive from a
syringe
barrel (sizes 3cc, 5cc, 10cc, 30cc or 55cc).
A wiper piston
is inserted into the syringe. The syringe is attached to an
adapter assembly hose which connects to the
dispenser. A luer lock precision tip is fixed to
the
barrel.
The digital air pressure is set to ensure a good
flow rate for the adhesive. The timer is adjusted for repeat dots or
switched off for controlled lines. A vacuum is adjusted to prevent any
drips. When pressing the foot pedal, accurate deposits of anaerobic
adhesive are made to wherever the tip is positioned.
This system is low cost, simple to setup and requires low maintenance.
Replacement syringe barrels,
pistons and tips are available in many sizes and
types for micro dots, lines or larger deposits.
Metering
Valves.
Dispense adhesive direct from
the 250 gram or 500 gram bottles. We have a range of
pressure pots that accept bottles and adhesive is fed
down a fluid line to a metering valve. This valve that is pulsed
for dots or lines by a
digital timed controller.
The valve can be hand held but is typically stand
mounted or fixed in place. It is also compact enough to be mounted on a
robot head.
For most applications, we recommend the using the
diaphragm valve. They require low maintenance and provide very
fast and accurate repeat deposits without drips or mess.
The deposit sizes are controlled by a digital
dispenser (for foot pedal control) or digital
controller when linking to a PLC or other external source.
A pressure pot or tank will feed
the adhesive under regulated pressure for correct flow.
The
TS-500R digital controller will time this valve
for repeat deposits up to 600 times per minute. Repeat dots or
controlled lines. Link to a PLC for external initiation or foot
pedal control. Adjustable timer from 0.008 to 60 seconds.
0-100 psi adjustable air regulator with digital display in Bar or PSI.
Store up to 10 timed memory settings. Low pressure alarm.
Line
Dispensing from Tanks.
For controlled lines of PVA
adhesives direct from bottles, our hand lever valves provide a
high level of control. The bottle is placed in the
pressure pot or tank and regulated for correct flow.
Adhesive is fed under pressure down a fluid line to
a diaphragm valve. Once the lever is pressed,
adhesive flows at a controlled rate. The lever shuts off to ensure no drip
or mess.
This valve system will not produce repeat or exact dots. It is ideal for
non-timed deposits and beads of all low to medium viscosity fluids including
cyanoacrylates and solvents.
This system is low cost, simple to setup and requires low maintenance.
Replacement fluid lines,
fittings and tips are available for this valve system
and others.