July, 2012 Continued from previous page
sion two-part dispensing system from FRC, technicians can program the ratio, flow rate and quantity of the potting compound to be dis- pensed by using the system’s LCD touch panel. The circuit board is then placed
under the dispensing machine’s stat- ic-mixing nozzle, and the technician simply depresses a foot switch to release the programmed amount. A computer-based system allows fast setup, and operators can adjust and store multiple flow rates, mix ratios and even entire dispensing cycles. The optically encoded servo drives and microprocessor-controlled hard- ware are driven by the company’s programming technology that deliv- ers extremely accurate and repeat- able shots. After components are mixed in
a static mixer, the positive shutoff valves prevent cured material from clogging the lines. Further, because dynamic shaft seals are not required — because of FRC’s use of a progres- sive-cavity design — valve wear, leakage and potential phasing errors that are common in piston-pump sys- tems, are eliminated. This equip- ment replaces labor-intensive proce- dures that ordinarily require manual mixing and dispensing of the potting compound. Without an automated, precision meter mix dispensing sys- tem, companies must buy potting material in kits where the resin and catalyst must be mixed by hand. Operators then manually mix the material in the kits and then dis-
material. With the machine’s shot- size accuracy and range, adjustable flow rate and predictable, consistent ratios, a very repeatable process can be expected in production. The dis- pense equipment should integrate into most commercially available robotic systems.
Flexible Digital Control The addition of flexible digitally
controlled meter mix systems, built around a workstation format, allows the user to utilize the positive dis- placement pump technology that is especially suitable for medium-to- high volume dispensing require-
www.us-tech.com Meter Mix Dispensing
ments, through proprietary micro- processor programming controls. These systems are capable of up to 40 stored dispense programs, and offer the lowest maintenance require- ments available in the industry, resulting in a lower cost of ownership compared to competitive systems. FRC’s systems are specifically
engineered to accurately meter plu- ral-component adhesives and sealants, regardless of viscosity, and feature programmable ratio, dis- pense volume and flow rate. Traditionally dispense equipment is thought of as being configured with piston or metering rod displacement pumps or gear pumps. Each of these styles of pumps have been used because of their specific delivery capability however each of these
Page 59
designs have high wear rates when used to pump moderately to highly filled or abrasive materials. The utilization of progressive
cavity pumps provides an excellent vehicle for dispensing a wide variety of materials. Progressive cavity pumps have an internal helix-shaped rotating element called the rotor and a double-helix shaped stationary external element called the stator. The interference fit between rotor and stator creates a series of sealed cavities. These cavities are continu- ally filled with material at the pump assembly inlet, and gently move the material, relatively undisturbed, to the pump outlet. The effective result: solid materials that are smaller than the cavity size can be dispensed with-
Continued on page 63
Faster, Easier, Smarter Jetting
The NexJet™
The next generation delivers it all – System
featuring the innovative Genius™
Dispensing epoxy potting on the production line.
pense into the units to be potted, gen- erating a significant amount of addi- tional waste. The cost of buying the material in kits, plus the labor involved, can also be very high. It has been estimated that an
automated precision dispensing sys- tem pays for itself in roughly one year for an average user. In addition, companies can purchase materials in larger 55-gallon kits, allowing the equipment to handle all mixing and metering chores, further reducing costs, and speeding ROI (return on investment).
Microprocessor Control The amount of material, dis-
pense time, flow rate and ratio can all be adjusted from a keypad with LCD interface. A microprocessor is programmed, at ratio, to turn the pumps for the selected dispense vol- ume and can save a number of pro- grams of different parameter set- tings for quick transfer between applications requiring different vol- umes of material. Highly accurate signal-to-action timing enables con- sistent and repeatable deliveries of
You can rely on our award-winning support network. Contact us now to find out more.
USA:
info@nordsonasymtek.com Tel:
1.800.ASYMTEK or +1.760.431.1919
China:
info-china@nordsonasymtek.com Beijing: +8610.8453.6388 Guangzhou: +8620.8554.0092 Shanghai: +8621.3866.9166
Europe:
cs.europe@
nordson.com +31.43.352.4466
Japan: Korea: India:
info-jp@nordsonasymtek.com +81.3.5762.2801
info@nordsonasymtek.com +82.31.765.8337
info@nordsonasymtek.com +91.44.4353.9024
Singapore:
info@nordsonasymtek.com +65.6796.9515
Taiwan:
info@nordsonasymtek.com +886.229.02.1860
advancedjetting.com See the NexJet System at SEMICON West, Booth 6071 See us at Semicon West / Intersolar, Booth 6071
The easy-to-remove Genius Jet Cartridge’s built-in memory tracks and stores usage data, thereby increasing quality and consistency in exacting manufacturing applications.
Get the quality dispensing you need with the Genius™
Jet Cartridge* and NexJet™ System* .
Invented by the leaders in jetting technology... Nordson ASYMTEK.
Jet Cartridge is removed quickly, without tools, for easy cleaning or replacement, saving time and money
intelligently communicates with the dispense system to monitor usage and indicate replacement
of fluids and applications
to center the process window for clean, precise results
precise coating, and adhesive dispensing
* PATENTS PENDING Jet Cartridge
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