3 August 2011Manufacturing / Production Technology, Hardware & Services
Nordson ASYMTEK has introduced a new film coater for automated, selective and precision application of conformal coating materials. The Select Coat SC-280 provides greater than 99% fluid transfer efficiency, improving material utilisation by 30 to 50%. It selectively coats complex circuit boards in seconds. Because the coating material is not atomised and is precisely applied to the selected areas, overspray, masking and rework associated with conventional conformal coating processes are minimised or eliminated.
The system applies conformal coating material in a controlled, uniform film rather than an atomised spray. Material is directed under low pressure through the dispenser and dispensing nozzle. Material is applied to the circuit board prior to the point of atomisation.
The SC-280 has a single valve design and comes in two versions: circulating (SC-280C) and non-circulating (SC-280N). It handles viscosities of less than 100 centipoise (cps). Coating thicknesses range from 0,5 to 8 mils for solvent-based materials. The stainless steel fluid path is compatible with virtually all coating materials.
A variety of cross-cut nozzles are available to dispense film pattern widths from 6 to 19 mm. Each nozzle delivers sharp edge definition with a tolerance of ±0,75 mm. The film coater has a 0 to 90° rotating axis and an optional five-axis accessory allows tilting of the nozzle to coat all four sides and under the components.
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