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On Mfg: Nov/Dec 2013

#Durr #Schuler


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Parts Cleaning System


It isn’t often that a newly developed system not only has claims to being highly efficient but also the 2013 Design Award winner of the state of Baden-Wuerttemberg, but that’s exactly what the EcoCCore parts cleaning system from Dürr Ecoclean (durr-ecoclean.com) can do. The system features two flood tanks, heat recovery, and bypass filtration capabilities. It permits switching from non-halogenated hydrocarbons to modified alcohols and back. It is capable of removing chlorinated oils from parts surfaces. The work chamber can hold cleaning tanks up to 670 x 480 x 400 mm. The maximum part load weight capacity is 200 kg. Cycle time is on the order of 8 minutes or less. There is a preliminary steam degreasing process that minimizes oil deposits in the flood tank which means that there is enhanced degreasing of parts, which is particularly important if they are to be subsequently coated or laser welded. The EcoCCore also permits using ultrasound and filtration simultaneously so that there is discharge of removed particles rather than having them settle to the bottom of the work chamber. Both flood tanks are heated with thermal energy recovered from the distilling system, thereby saving energy. Setup and operation are facilitated by a 7-in. color display. And one feature that undoubtedly helped the EcoCCore win the design award: it has an all-around enclosure made with safety glass.


Precision Fluid Dispensing System


“Miniaturization trends in semiconductor applications continue to push the limits of fluid dispenser capabilities to accurately dispense into smaller spaces between board components, camera modules, and die. Customers are increasingly more concerned with consistency and straightness of their dispensed lines, not just dot A to dot B system motion, in order to shrink their end applications,” says Garrett Wong, Spectrum Series product manager, Nordson ASYMTEK (nordsonasymtek.com). “MEMS sealant lines and solder paste applications challenge dispenser capabilities in precision Z-gap control and line path accuracy to achieve their required thin line widths and small dot sizes. The new Spectrum II product family meets the needs of this market by driving mechanical and software improvements to achieve ultimate precision and accuracy in all three axes—X, Y, and Z—at speeds up to 30,000 dots per hour with a minimal footprint to maximize productivity per square meter.”  The Spectrum II he is referring to enables consistent <200µm dots and solder paste line dispensing; features a tilt jetting capability for precision coating and underfill in hard-to-reach places; and offers non-contact laser height sensors for detecting surface heights and allowing tight dispense gaps for thin dispense lines.


Laser Blanking System


While laser blanking systems are used for low-volume runs (prototypes or spares), when it comes to making mass production volumes of things like doors, hoods or trunk lids, generally it has been a case of using blanking dies. But Schuler (schulergroup.com) has developed a Laser Blanking Line that uses what the company calls “Dynamic Flow Technology” that permits cutting coiled materials from 0.5- to 3-mm thick at up to 100 m/min with three 4-kW fiber lasers that are positioned with linear drives. The lasers are located in a housing. Coil stock is decoiled, straightened, then fed into the housing; the position of the coil is monitored by a camera and adjustments are made to assure precise location of the lasers in relation to the material. Slag and scrap are collected under the belt; dust and fumes are sucked into a filtration system. Part unloading is performed robotically. Part changes don’t require retooling, just programming. 

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