CJP printing is a special printing technology that produces colorful 3D printed objects and is one of the fastest processes available. This technology is also referred to as Binder Jetting, Sandstone Printing and Powerbed Printing.
Advantages of the CJP process:
Color – The (CMYK) printheads provide an exceptionally wide range of colors.
Fast – This is one of the fastest processes available.
The individual layers are not as apparent on the final object as on models printed using FDM technology with similar layer thickness.
Due to the powder based technology, there is no need for additional support material.
The resdual powder can be reused and reloaded into the system.
Disadvantages of the CJP technology:
Fine and elaborate details may be lost.
Thin, protruding parts with less than 2 millimeters of thickness may occasionally break off.
The textured or vertex colored 3D models are sliced into layers by a special software. Layer thickness is a constant 0.1 millimeters. For ideal cost efficiency, printing more objects at the same time is desirable, utilizing as much of the realtively large available printing area as possible.
Before starting the process, the printer verifies that enough materials are available for the print. If everything is in order printing can start.
As the first step, the printer creates a bed of smooth powder. Then for each layer, it lays a 0.1 millimeter thick layer of powder and injects binding and coloring materials into it using the ink-jet printer heads.
This is how all subsequent layers are built, until the desired form is completed. After completion, the residual powder is removed.
The remaining powder is then removed from the models by using compressed air. The final step of the process is to impregnate the prints with an infiltration fluid, which gives the prints more sturdiness and enhances their color.
The fluid used can be acrylate, wax or even epoxy resin depending on the purpose of the prints.
CJP technology has a very wide range of application.
We apply this process in most of our general 3D printing tasks, but it is also a preferred technology to build concept models, prototypes and scale-models. It is very popular among museums as well.
Our miniME figures are printed using this process. In certain cases it is also used in tooling manufacture as well.