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7 Fluid Positioning & Dispensing Applications Conformal Coatings For precise, micro-spray applications of conformal coatings, the 787MS spray valve uses Low V olume Low Pressure (L VLP) technology to apply a fine, co…

Fluid Positioning &

Dispensing Applications

Primers

Functional fluids

Surface treatment coatings

Primer applications increase the adhesion of different subassemblies, e.g. volume

and power button components, to pressure sensitive adhesives (PSAs). This

makes components more durable and able to endure multiple clicks by users.

Primers are highly volatile solvents and are difficult to handle and dispense.

Nordson EFD’s expertise in precise fluid dispensing allows manufacturers

to dispense accurate amounts of these functional fluids in constrained and

miniaturized areas. Uniform coating that results due to dispensing primes the

substrate uniformly for smooth operation during its life cycle.

EFD solutions allow manufacturers to coat PCB components with uniform

spray patterns as small as 1 mm (0.04") in diameter and dispense microdot

deposits as small as 0.15 mm (0.006") in hard-to-access areas. Our tabletop

robot solutions facilitate this process by offering an end-to-end solution.

Recommended Solutions

• PICO XP jet valve

• Liquidyn

P-Jet jet valve

• 787MS-SS MicroSpray valve (for primers)

• 781Mini spray valve (for primers)

• 741MD-SS MicroDot needle valve (for adhesives)

• xQR41 Series needle valve (for adhesives)

• EV Series automated dispensing system

• OptiSure AOI software

Benefits: Convenient, reproducible, and accurate deposits of low viscosity

solvents in hard-to-reach areas that aid the manufacturing of different

components in the assembly process.

General Assembly

Primers

Fluid Positioning &

Dispensing Applications

Conformal Coatings

For precise, micro-spray applications of conformal coatings, the 787MS

spray valve uses Low Volume Low Pressure (LVLP) technology to apply a

fine, controlled mist onto microchip leads on the main printed circuit boards

of mobile and wearable devices. When paired with a spray valve controller,

which has a post-atomizing feature for clean spray cycle finish, the system

produces practically no over-spray or mist.

The valve system works best when fully integrated with a 3-axis E Series

automated dispensing system, which features an intuitive Teach Pendant

and custom EFD TeachMotion™ dispensing software for fast, easy setup

and programming.

Recommended Solutions

• 787MS-SS MicroSpray valve

• 781Mini spray valve

• E Series automated dispensing systems

Benefits: Ideal for micro-spray application of conformal coating, the 787MS-SS

provides narrow, consistent spray patterns as small as 1 mm (0.04") wide

without overspray.

Coupled with E Series tabletop automation, the dispensing system provides

market-leading positional repeatability at +/- 0.008 mm.

General Assembly

Conformal Coating

Fluid Positioning &

Dispensing Applications

Thermal Compounds

Both the 725DA piston valve and 794 auger valve are ideal for thermal compound

applications because of their superior ability to dispense precise amounts of

high-viscosity sticky and stringy fluids. Together with a ValveMate™ valve controller,

these systems apply accurate, repeatable amounts of thermal compounds onto

heat sinks for central processing units (CPUs) and memory chips.

Each valve system works best when fully integrated with a 3-axis E Series

automated dispensing system, which features an intuitive Teach Pendant

and custom EFD TeachMotion dispensing software for fast, easy setup and

programming.