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September, 2017 German RepRap Creates Liquid PU Material


Coral Gables, FL — German RepRap, in collaboration with ebalta Kunst- stoff, has developed a new poly - urethane (PU) material that can be


used for additive manufacturing. Ac- cording to the companies, for the first time ever, the material can be processed by a 3D printer in its liq-


uid state, thus eliminating the melt- ing process. Due to chemical cross- linking, the material has isotropic mechanical properties when printed. The PU material was developed


with a wide range of properties, from soft to hard. The manufac- turing process produces a comparable structure to that yielded from the fused filament fabrication (FFF) pro cess. However, this PU material enables the print- ing of highly-complex parts, which may be difficult or impossible with existing in- jection molding technology. The mechanical prop-


erties are similar to those of an injection-molded part. This new ability to process PU-based materials opens up whole new areas of application, such as prototype construction or func- tional models for consumer goods. The special properties of PU can meet a va- riety of requirements (e.g., for specific strength and flame retardant materi- als). Processing at room temperature enables an energy-efficient printing process and material shrinkage be- tween 1 and 2 percent. This avoids such problems as thermal warping or detachment from the print bed. Polyurethanes are used predomi-


nantly as foams for insulation, mat- tresses, and upholstery, as well as in paint and adhesives. Additional appli- cations for PU materials include all types of seals, hoses and sealants. Due to their excellent mechanical proper-


Liquid polyurethane material for 3D printing.


ties, polyurethanes are suitable for special applications, such as those that require high resistance to wear. This makes them suitable for applica- tions across many industries, especial- ly automotive, aeronautics and con- struction.


Contact: German RepRap USA, 5246 SW 8th Street, Suite 204a,


Coral Gables, FL 33134 % 786-701-0700 E-mail: support@germanreprap.us Web: www.germanreprap.us


PCB Intros Triaxial Isolated Accelerometers


Depew, NY — PCB’s two new triaxial ICP® accelerometer models, 354A04 and 354A05, are case-isolated to help ensure measurement accuracy in the presence of electrical noise sources, such as EMI and ground loops. These accelerometers are rugged and durable, with titanium housings. The case-isolated design eliminates the need for special isolation bases, coat- ings and insulated mounting screws. The through-hole mounting configu-


ration allows the accelerometers to be rotated 360° prior to tightening the screw, allowing easy installation. Both models are TEDS IEEE


1451.4-enabled for easy tracking and record keeping, containing manufac- turer, model number, serial number, calibration date, sensitivity, frequen- cy range, and measurement ID. Case isolation makes these ac-


celerometers suitable for vibration measurement of structures that have poor electrical grounding. The hous- ings are hermetically sealed for reli- able operation in high-humidity and


Triaxial ICP accelerometer.


dirty environments. Both accelerom- eters have an operating temperature range of –65 to +200°F (–54 to +93°C) and a frequency response from 0.4 to 5,000 Hz. These features make them useful for flight testing, ground vibration testing, and envi- ronmental stress screening. Built-in ICP microelectronics


provide a low-noise, low-impedance output signal capable of signal transmission over cable lengths of hundreds of feet. Any ICP signal conditioner or data acquisition sys- tem that incorporates an ICP con- stant current power supply can be


used to power the accelerometers. Contact: PCB Piezotronics, Inc.,


3425 Walden Avenue, Depew, NY 14043 % 800-828-8840 fax: 716-684- 0987 E-mail: info@pcb.com Web: www.pcb.com


See at SMTAI, Booth 233


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