December, 2015
www.us-
tech.com
Rehm: Cooling Zone Options for VisionX
Blaubeuren, Germany — Rehm Ther- mal Systems offers a wide range of cooling zone variants for reflow con- vection soldering with its VisionX range, which can be fine-tuned to suit different production processes. As well as the water-cooled standard solution with adjustable ventilation system, the company offers several additional options for large and high- mass boards, primarily a power cool- ing unit as an extended cooling zone
ules, an adjustable cooling system is required that meets the demands of the electronic components. As well as the cooling zone, the company can also extend the cooling zones using a power cooling unit. As part of this process, cold air is fed onto the board from above, where it can be cooled in a more gentle manner as a result of the process being extended. The power cooling unit can be implement- ed in the form of an extension to the
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Cooling zone with adjustable ventilation system.
or a bottom cooling system. The com- pany has also designed a coolant- and water-free reflow soldering sys- tem, which uses liquid nitrogen. The VisionX range turns the
classic cooling zone into a two- or four-layer system, depending on the facility. This design incorporates an active cooling process, water-cooled, using heat exchangers in a closed- loop system. The process air is cooled in the heat exchangers and flows onto the module from above. The air is subsequently sucked underneath, cleaned using a filter system, and ready for the next process. Individually adjustable ventila-
tors in each of the zones make it pos- sible to precisely control the cooling process and influence the cooling gradient accordingly. A module can then be cooled to less than 50°C (122°F) in a stress-free manner, even in the case of lead-free soldering. In addition, the cooling zone filters are easy to clean, and can be replaced from the rear of the system. Also, there is no need to open the process chamber at any point. In order to cool complex mod-
standard zones in a nitrogen atmos- phere as a separate, downstream module for increased cooling capacity. In the case of large or heavy
modules, regular cooling power may not be enough to generate the desired outflow temperature. Bottom cooling makes it possible for the VisionXP+ to cool high-mass boards easily and effectively. The cold process air is blown onto the board in equal meas- ures from above and below in order to facilitate a homogenous cooling process and to reduce tension in the material. It is possible to adjust the ventilator speeds for each module. This makes additional cooling meas- ures, such as an outfeed belt with ventilators, unnecessary. Predomi- nantly, modules with heterogenous distribution of the copper positions will be protected against twisting and warping as a result of bottom
cooling. Contact: Rehm Thermal Sys- tems LLC, 3080 Northfield Place,
Suite 109, Roswell, Georgia 30076 % 770-442-8913 fax: 770-442-8914 E-mail:
p.handler@rehm-group.com Web:
www.rehm-group.com
Stratasys: More Resins for 3D Printers
Eden Prairie, MN — Stratasys has released its Ultem™ 1010 resin for the Fortus 400mc and 450mc 3D pro-
duction-level printing systems. This material has been available for the Fortus 900mc 3D Production System. Added to the company’s material portfolio in 2014, this high-perform- ance FDM thermoplastic offers heat resistance, tensile strength and chemical resistance. The resin is also bio-compatible per ISO010993 and has food contact certification of USP Class VI — food contact (NSF 51). The resin is also compliant with FST regulation. Well-suited for aerospace, auto-
motive, food processing, and medical device applications, the material combines strength and thermal sta- bility for advanced industrial tooling. Applications for aerospace and auto- motive include clips, housings and ducts. Food production tools include patterns, dies and fixtures. Custom medical tools may include surgical
guides, fixtures and trays. Contact: Stratasys Ltd., 7665
Stratasys’ Fortus 3D printing system.
Commerce Way, Eden Prairie, MN 55344 % 877-489-9449 Web:
www.stratasys.com
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