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Application specific spray guns
© Graco
Graco‘s new aerospace gun models feature a special air cap, highly wear-resistant electrode and precision nozzle to achieve a finer, more uniform spray pattern with uniformly sized particles. The guns are ideal for high solids materials and abrasive coatings applied at very high paint flow rates. The new models with fixed material flow rates are also designed for the application of abrasive materials and feature more durable electrodes and nozzles, extending the life of the applicator. The new HVLP guns are supplied with an HVLP air cap as standard and are mainly used where environmental standards must be met and HVLP marking is required. If demanded, the guns can be used without electrostatics and still meet HVLP requirements. A new externally rechargeable Pro-Xp-WBx waterborne paint gun reduces material and environmental costs without the cost and limitations of an electrostatic insulation system. Water-based materials remain grounded in the gun and are charged at the spray gun nozzle using a probe. Benefits of these guns include lower equipment costs, improved application efficiency and more complete coverage with less overspray. Many of the existing Pro-Xp range components are now even more durable. // www.graco.com
Energy-saving heating system for vibratory finishing
© Rösler
of water spots. The most common drying machines are rotary, vibratory dryers filled with a drying medium that absorbs the moisture from the work pieces. To achieve the required drying temperature the heat, generated by heating elements, is transferred through the “insulating medium” air to the base plate of the dryer. This, somewhat old-fashioned heat transfer is accompanied with a high heat loss. Since dryers are normally running non-stop during a shift, they require a considerable energy input. With the newly developed heat block heating system Rösler can now offer rotary vibratory dryers with drying medium that allow significantly more energy-efficient drying operations. Since the heating system is now directly connected with the base plate of the processing bowl, the heat transfer takes place with minimal heat loss. This design change has reduced the energy con-
Around 90 % of all mass finishing applications are wet processes so that the finished work pieces must undergo a subsequent drying stage in either continuous feed or batch operation. This provides temporary corrosion protection, allows trouble-free down-stream manufacturing operations and guarantees a work piece surface free
sumption by 30 to 40 %. Further energy savings are achieved by the continuous, thermostatically controlled temperature of the drying medium. Once the set temperature for a specific drying process is reached, the heating system of the dryer is turned off and only turns on again, when the temperature falls below the pre-set level. This temperature control can be linked with the preceding mass finishing machine(s) or can be integrated into a higher-level control panel. The new development will assist the customer
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