Stratasys is making Most realistic 3d printed and advertises them as new flagship possibilities, the J750 series as “most diverse 3D printers of all time”. Similar to “the best of” is HP. The industry newcomer wants with his jet Fusion for all “newly invented technology 3D printing” allow serial production. cadINcadOUT hereby compare this two systems.
Fascinating: Under the withdrawn skull, the soft brain is not only visible, but also felt. In the transparent neck, veins, arteries, can be traced lymphatics and nerves. The colorful bust of Anatomy acts like it is borrowed from the controversial Plastinators Gunther von Hagens body worlds exhibition. But in fact it is the product of the latest 3D printer from Stratasys J 750.
Special feature: The individual components were produced not one after the other, then mounted and finally cast in acrylic glass. Instead, the entire model in one piece, layer by layer, just a print job was created.
New 3D printers by Stratasys processing different materials
This is possible because the J750 can record simultaneously six different materials and then process, combined or as mix. Through the blending of differently colored materials, he can realize approximately 360,000 colors.
15 basic materials are available: solid polymers that are either colored or transparent are among the “Vero” family. The “Tango” family consists of rubber-like material, which can be black, grey or translucent. Digital-ABS, a plastic that is particularly robust and resistant to heat is also available. Almost everything can mingle with each other. Colorful and translucent products in different shore harnesses, so various degrees of flexibility are accessible in this way.
Target group of printer are mainly for prototyping designers. “We meet their needs with the J750 exactly”, so Joshua Claman from Stratasys management. “Due to shorter decreasing product life cycles they are instructed to be able to present their designs more quickly.”
A cartridge will cost around €1000, and you will change it very often.
The designers are supported by a software developed specifically for the J750. “It is intuitive to use,” Claman underlines. A usual print file (typically in STL format) with additional information on colors and gradients could be enriched with a few clicks. In addition, the surface could be determined. Several pattern textures are stored, about “grainy leather”.
The printer is equipped with four print heads. Each has two separate fields of 192 individually controllable jets. The minimum layer thickness is 14 µm. Three of the print heads bring out the model materials. The fourth is reserved for the support material. This can then be used if overhangs on the final product must be supported during the printing process. It is washed off with water after completion of the print job. A cartridge of the print material (3.5 kg) will cost around €1000. The machine itself fails with around 250 €000 to beech.
Hewlett-Packard Jet fusion technology produce most realistic 3d printed objects
Now in fact also can be ordered as often advertised Jet fusion technology from Hewlett-Packard. The company, previously known for its 2D printer, wants to revolutionize the additive manufacturing.
The solution consists not only printer. Also software, as well as the so-called processing station belongs to the total package. Due to the combination of three components is according to HP “the world’s first Complete 3D Printing System that is suitable also for series production”. It could produce a large number of finished products at a competitive cost in a short time.
The workflow should look like: first of all, the designer designs the product with the intuitive software. The right amount of required pressure powder is then mixed in the processing station. The material into a roller containers, the so-called build unit will be dumped. This is then pushed into the printer.
In the printer, the printing process starts immediately. In the first step, driving a material slide horizontally from top to bottom on the production area and lays out a layer of compressed powder.
HP promises smooth, Burr-free surfaces and ten times faster production
In the second step, a service slide from right to left moves. An infrared lamp to pre-heat the material is installed in the front part of the head. Large fields of print nozzles are subordinate. Bring a fusion catalyst (“fusing agent”) where the solid material is to be created. At the same time they bring another means (“detailing agent”) in the border areas. It serves local maximums we can precisely control the fusion process, pause it or stop.
The fusion lamp is attached to the end of the print head. The two agents react differently to their heat. The powder is fused either or it remains fine grained. So smooth, Burr-free surfaces are created. Since the material slide as well as the service carriage on their work, the production process according to HP is ten times faster than with conventional methods of additive manufacturing. At the same time, the cost per parts are only half as high.
After the end of the printing process, the build unit, which now contains the finished products, is pushed back in the process. There is the space cooled and excess powder is removed. The recovered material is stored and is available for future print jobs available. The cleaned finished products remain.
HP bet on open platform to develop better product
Only a single material in the portfolio, a black polyamide has HP to the market launch. The offer will expand quickly. Because the Americans on the idea of the open platform. Certified partners such as Arkema, BASF, Evonik and Lehmann & Voss are invited to develop their own powders and sell in an app store.
In the software development relies on the expertise of an established partner HP. Including Siemens, Autodesk onboard. The HP printer supports not only the STL format aging. He is according to the manufacturer the first, the 3MF new also with the (3D Manufacturing Format) works. This transported a wealth of additional information as to color, material and surface condition.
Colours and textures of the printed products will vary HP through the use of “transforming agents”. Depending on this liquid each volumetric pixels (“voxel”) can take on various properties. It can be colored, rubbery, translucent or even conductive.
HP Price starts since $155,000, cartridges since $500/3kg
According to the American future sensors can be used in this way and print labels important during the industry 4.0. When exactly this potential is lifted, but does not reveal the companies.
HP manufactures two variants of the printer. The “Jet fusion 3D 4200” to be delivered at the end of the year. 2017, the little brother, then follows the “Jet fusion 3D 3200”. The two engines differ with regard to speed and accuracy. The top model creates 4500 cm3 per hour with a minimum layer thickness of 70 μm. The comparison value for the slimmed down version: 3500 cm3, 80 µm.