Nordson_EFD_Solutions_Mobile_Device_Wearables_Wireless_Brochure.pdf - 第9页

6 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 pre…

Fluid Positioning &

Dispensing Applications

General Assembly

Hydrophobic Coating

Hydrophobic coatings

Nordson EFD solutions enable the precise application of hydrophobic coatings

to select areas of mobile devices and wearables during final assembly. With

consistent, uniform micro spray patterns, these Low Volume Low Pressure

solutions prevent water ingress.

Liquid droplets fly off critical components such as speakers and microphones,

eliminating damage, which improves the reliability of the final product. This

enhances durability of the device components for long-lasting use during

their life term.

Recommended Solutions

• 787MS-SS MicroSpray valve

• 781Mini spray valve

• EV Series automated dispensing system

• 4-Axis R Series automated dispensing system

Benefits: Micro spray patterns between 1 mm (0.04") and 19.1 mm (0.75") in

diameter. Zero overspray and reduced waste and operating costs associated

with expensive protective fluids.

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.