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3D Printing Certification

Fraunhofer IWU develops Screw Extrusion Additive Producing process for higher-speed 3D printing


The Fraunhofer Institute for Machine Tools and Forming Know-how, (Fraunhofer IWU) in Chemnitz, Germany, has produced the first prototype of its Screw Extrusion Additive Manufacturing certification (SEAM) method for large-velocity FFF/FDM 3D printing certification.

The SEAM process, which will be unveiled at Germany’s Hannover Messe 2019 trade honest in April, is a hybrid equipment integrating device resource technology with additive producing certification.

In accordance to Dr. Martin Kausch, Head of Department STEX – Devices and Systems for Textile Structures, this 3D printer is equipped with a development system able of swiveling in six axes. Above is the screw extruder intended to melt and eject plastics at a large output rate.

“This [unit] enables us to print eight periods more rapidly than typical processes, enormously lessening the output situations for plastic parts.”

The SEAM 3D printer. Image via Fraunhofer IWU.
The SEAM 3D printer. Picture by means of Fraunhofer IWU.

Hybrid machining 

In 2017, Fraunhofer IWU entered into a partnership with Italian equipment center makers CMS to exploration and establish a new hybrid CNC milling 3D printer. This collaboration is trying to get to handle the sluggish 3D printing certification velocity of FFF for the mass-production of factors, specifically, in just the automotive marketplace.

This birthed the strategy of the 3D Kreator system, created to run over and above normal XYZ directional 3D printers. Applying the SEAM procedure, this 3D printer was constructed with device paths across 5 axes, supplying a lot more geometrical independence to FFF.

Now, a new SEAM system has been understood and is claimed to acquire 18 minutes to deliver a plastic ingredient 30 centimeters in peak. This is a significant difference from the several hours taken for some FFF 3D printed types.

This experimental component is a hybrid of carbon fiber reinforced plastic sheet metal and 3D printed structures – SEAM makes it possible to print on injection-molded components or sheet metal for the first time. Image via Fraunhofer IWU.
This experimental part is a hybrid of carbon fiber strengthened plastic sheet metal and 3D printed constructions. With the SEAM method, 3D printed structures can be built-in on injection-molded or sheet steel factors. Picture through Fraunhofer IWU.

A new SEAM program

The construction system on the hottest SEAM system can be moved at a velocity of one meter for each second in the X-, Y- and Z-axes and can also be tilted by up to 45 degrees, in accordance to Dr. Kaausch. Additionally, SEAM processes are crafted to reduce material expenditures by a variable of 200. This is executed by the swiveling platform which in the long run allows the potential to 3D print on curved structures with a separately going Z-axis.

Kausch spelled out, “In exams, we have been able to procedure a large wide variety of plastics. They ranged from thermoplastic elastomers to significant-general performance plastics with a 50% articles of carbon fiber. These plastics are resources that are particularly pertinent to sector and are not able to be processed with classic 3D printers.”

The to start with SEAM 3D printer will be shown at Hannover Messe 2019 from April 1– 5th (Hall 2, Booth C22).

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Showcased graphic exhibits the SEAM 3D printer. Image by way of Fraunhofer IWU.