How does PolyJet 3D Printing work:

The Polyjet (a.k.a. Multijet Modeling) technique was developed by the company Objet Geometries Ltd.. Objet was founded in 1998 by Rami Bonen, Gershon Miller and Hanan Gotaiit. After about ten years, the company presented the first multi-material 3D printer. In 2012, the first PolyJet 3D Printing system with more than 100 combined materials was introduced by Objet Ltd. In the same year, Objet merged with the industry giant Stratasys.

PolyJet 3D Printing is similar to inkjet document printing, but instead of jetting drops of ink onto paper, PolyJet 3D printers jet layers of liquid photopolymer onto a build tray and instantly cure them with UV light. The layers build up to create a precise 3D model or prototype. Along with the selected model materials, the PolyJet 3D printer also jets a gel-like support material specially designed to uphold overhangs and complicated geometries. It is easily removed by hand or water. The most advanced PolyJet system, the J750 Printer, combines diverse 3D printing materials in one model by jetting multiple materials simultaneously (in full color). This means the user can selectively position multiple materials in one printed prototype and even combine two or three materials to create composite models with distinct, predictable properties.


PolyJet 3D Printing Materials:

There are plenty of materials available for this technology. We offer 4 standard materials. Besides the ‘pure’ materials, it is possible to ‘blend’ materials during the print process. As an example, Tango with a shore hardness of around A25 can be mixed during the print process with traces of Vero, to create a digital material with a final shore hardness of A 50 or higher. Based on this method, soft materials can be created with a shore hardness range from ~A25 – 95.

Vero: Rigid, high-resolution and all-purpose plastic, one of the most popular prototyping materials

VeroClear: Transparent material that simulates PMMA

Agilus30: Simulate thermoplastic elastomers with flexible, rubber-like qualities


Examples of PolyJet 3D Printing Parts:


PolyJet 3D Printing Design Guide:

Engineers and Designers who are planning to produce PolyJet 3D Printed parts benefit greatly from the extreme design freedom that this process affords with materials like VeroBlack. Unlike traditional manufacturing processes like injection molding and CNC machining where there are limits on what features can be designed into a part due to cost, set up, or tooling restrictions. PolyJet 3D Printing is an additive manufacturing process and therefore you are only limited by your imagination and a few very basic guide lines.

Possible to print rubber like materials targeting a specific Shore A hardnessPolyJet parts can have threaded brass inserts glued into themCan print with a layer thickness as small as .0006″
No draft required on the partIndividualized serial numbers can be printed into each piece that is being madeCan print multi-materiel parts, for example: VeroBlack and TangoBlack to simulate a hard part body with TPU overmolding on it
Smooth finish on “Class A” surfacesPolyJet does a great job with assemblies, living hinges, snap fits, and pin hinges.Parts are great for model making activities like clear coated lenses and “Class A” finishes
High-resolution, high-accuracy prototypesPolyJet is able to print models in full color, no need for sanding or paintingVery smooth surface; fine layer lines can be easily removed

Our PolyJet 3D Printed Part Design Guide will offer you useful design tips for this 3D printing process as well as answers to many frequently asked questions about about the PolyJet 3D printing process.

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