ColorJetPrinting (CJP) is an additive manufacturing technology that consists of the core and the binder. the printing process involves the use of the core material spread in thin layers over the build platform with a roller and each spread layer the colour binder selectively jetted from inkjet print heads, which causes the core to solidify. The build platform lowers every after a layer which is spread and printed, resulting in a full-colour three-dimensional model.
ColourJet 3D printer operate similarly to an ink jet printer except the printer prints on thin layers of white plaster powder instead of a paper .The ink in this context is the binder which acts as an adhesive glue holding the powder together .Colour binders comes in 5 different colours mixed together to form the colours and the overal shape of the 3Dmodel.
The process begins by printing each layer on top of the other and using the binder to layers together .the printing platform during this process lowers by 0,088 or 0.1mm after each layer then, spread new plaster in the next layer that it prints .hence this is a repetitive process during the machine operation until the print is complete .
After the print completion while the model is soft and fragile ,a cleaning process begins whereby it is later infiltrated with an acrylic compound which gives the model strength.
Hand made architectural model could be very time consuming and not precise so, with Colorjet 3D Printing, the colours and textures and the parts of the model can be printed and completed overnight hence saving time and costs.
Transporting machine to produce design model in fairs and exhibition always seems difficult but with Colorjet technology, it is possible to quickly deliver full-colour replicas and realistic miniaturized models to events and sales pitches for fairs and exhibitions for display and sale purposes.
In Science of Educational institutions, CJ technology can be used to produce full colours model of organs, complex molecules, anatomical structures hence is useful in a demonstration in classroom and lecture halls. Even in the context of hospitals or research centres Data from CT, MRI, MRT, NMR or 3D microscopy technologies can be printed into colored physical objects.
ColourJet printing uses plaster powder as the core materials and it is referred to as full-colour sandstone due to its appearance and tangibility but it’s not weatherproof unlike the natural sandstone and the binder materials are coloured glue. After the production process, the surface becomes very rough with moisture and hence requires post-processing. The process involves removing extra powder from the part, infiltration with cyanoacrylate (‘super glue’), to increase stability, surface smoothing and application of Clearcoat sealing. Therefore the following is some of the material used to produce standard finishes such as Epoxy coating, Epoxy infiltration, Spray painting, ColorBond, and ColorBond with a wax coating. ColorJet prints go through two-stages of post-processing:
1) After the print has finishes excess powder is removed by compressed air and caution shall be taken as at this stage the parts are very fragile and can break.
2)The next step is to infuse the parts with cyanoacrylate to give them rigidity and strength.
Produce full-colour 3D Prints Cost-effective technology Doe not require Support structures Price high complex geometries Saves time with quick production times
Brittle, low mechanic strength Cannot be used for functional prototypes, since abrasion is too high and the material breaks easily Not water-resistant