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Fabrication Process

Digital Construction Platform (DCP)

The 3D Printed Hemi-ellipsoidal Dome is a first-of-its-kind architectural-scale structure robotically fabricated with the Digital Construction Platform (DCP).  Using the Mediated Matter group’s Print-In-Place construction technique, an open domed structure with a diameter of 14.6m and a height of 3.7m was manufactured over a print time of 13.5 hours. The geometry of the test print is a hemi-ellipsoidal dome design, where the wall thickness of the formwork cavity decreases with height. This enables optimized structural use of the cast material while providing maximum internal volume. This test print demonstrates many of the benefits of both the Digital Construction Platform and the Print-In-Place process, including the ability to rapidly print large-scale structures, produce complex digitally controlled curvatures, and fabricate on-site.

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Fabrication Process

ExOne’s Cold-Hardening Phenol Binder in Production Now

The ExOne Company’s “cold hardening phenol” (CHP) binder agent is now in commercial operation on a machine in Freiberg, Germany, for prototype casting producer, ACTech GmbH. It is the first 3D printer in the world using the new binder, which was first reported last September as a further development of the phenolic binder formulations ExOne debuted in 2013.

According to the developer, ACTech is able now to produce prototypes of challenging designs more quickly and cost-effectively. “Compared to traditional rapid prototyping procedures, this new technology enables the production of high-strength molds and cores for sand castings, which until now were achievable only with laser sintering,” according to an ExOne announcement.

http://m.foundrymag.com/moldscores/exone-s-cold-hardening-phenol-binder-production-now

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Fabrication Process

UMWELTFREUNDLICHER 3D-DRUCK

Auf dem Weg zu nachhaltigen, energie- und ressourceneffizienten Prozessen rücken die anorganischen Bindemittel in der Gießereibranche immer stärker in den Mittelpunkt von strategischen Entscheidungen.
voxeljet und Hüttenes-Albertus ist es erstmalig gelungen, anorganisch gebundene Formen und Kerne werkzeuglos im 3D-Druckverfahren herzustellen.
Damit ist das umweltfreundliche 3D-Drucken ein weiterer, konsequenter Schritt zu einem vollständigen Produktionsprozess ohne Umweltbelastung.

http://www.huettenes-albertus.com/produkte/anorganische_binder/rapid_prototyping/index.html

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Fabrication Process

FORMALDEHYD in der Innenraumluft

Formaldehyd ist ein farbloses, stechend riechendes Gas, das
in Wasser gut löslich ist. Seine chemische Reaktionsfreudig-
keit macht es zu einem beliebten Grundstoff in der chemi-
schen Industrie. So wird Formaldehyd in grossen Mengen für
die Produktion von Kunstharzen verwendet, die wiederum
der Herstellung von Spanplatten und anderen verleimten
Holzwerkstoffen dienen. Formaldehyd ist aber auch in Kleb-
stoffen, in veredelten Textilien, Isolationen und Papierproduk-
ten zu  nden. Zudem tötet es Bakterien, Pilze und Viren ab
und wird daher als Desinfektions- und Konservierungsmittel
verwendet.

http://www.eco-bau.ch/resources/uploads/Innenraumklima/d_Faktenblatt_Formaldehyd_2010.pdf

http://www.bag.admin.ch/themen/chemikalien/00228/05381/index.html?lang=de

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Fabrication Process

Spanplatten und andere Holzwerkstoffe

Das Grundmaterial für Spanplatten sind holzhaltige Faserstoffe. Überwiegend handelt es sich um Industrieholz (Sägewerks- und Hobelreste), Altholz, Bau- und Restholz sowie Schwach- und Durchforstungsholz. Da diese “Rohstoffe” nicht immer herkunfts- und sortenrein getrennt werden, können auch mit Holzschutzmitteln belastete Hölzer in die Produktion und anschließend in Häuser und Wohnräume gelangen.

http://www.schadstoffberatung.de/holz.htm

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Fabrication Process

ExOne Binders

ExOne® binders are central to the printing process. The type of binder used depends on the type of powder or system that is being used, or customer application requirements.

Furan Binder

Furan binder is a typical no-bake binder found in traditional sand casting applications, and therefore no foundry changes are required to utilize this binder material. Printed cores are  immediately available for casting with no heat required.

Phenolic Binder

Utilized for printing sand molds and cores, phenolic binder is the best suited for high temperature pouring of castings. Very thin walls or thin pipes can easily be printed, due to the high heat strength of the core. Parts are easily cured using microwave technology.

Silicate Binder

ExOne offers an innovative environmentally-friendly option, with a binder based on silicate for printing sand molds and cores. Using this binder for printing results in low gas emissions during the casting process. Parts are easily cured using microwave technology.

Aqueous-Based Binder

Many of our directly printed materials (primarily metals) utilize a proprietary aqueous-based binder, which acts as an adhesive, bonding layers of powdered metal together. Once the parts are printed, they are placed into a furnace and the binder is burned out of the parts while powder particles fuse together in a sintering operation.

http://www.exone.com/Resources/Binders

Categories
Fabrication Process

Material der voxeljet 3D-Drucker | Partikelmaterialien | voxeljet SYSTEMS

Material der voxeljet 3D-Drucker | Partikelmaterialien | voxeljet SYSTEMS