Binder Jetting

3D Printing Service

3Diligent's Binder Jetting Service is a cost effective option for full color models (Color Jet Printing) and for functional metal parts (Full Sinter Binder Jetting, Binder Jetting with Metal Infiltration).  

 

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Binder Jetting Process Overview

Binder Jetting is a 3D Printing process which involves building the layers of a part by selectively applying an adhesive to a powder bed. The powder bed then descends one layer in height, followed by a roll of fresh powder that evenly spreads a new layer over the part. After the shape of the part is printed, the part (now in the green state) will typically undergo some sort of post processing to make it stronger, commonly baking in a kiln. The metal, gypsum, or ceramic powder binds to itself to form a superior integral bond.

Certain printers - Color Jet Printers - can apply colored adhesive. This provides the opportunity to print in full color, suiting visual models and colorful, nonfunctional parts with complex geometries.

BJMI, binder jetting 3d printing, metal binder jetting, binder jetting with metal infiltration

Branded Processes (Also Known As)

  • Color Jet Printing (CJP)
  • Binder Jetting (BJ)
  • Full Sinter Binder Jetting (FSBJ)
  • Binder Jetting with Metal Infiltration (BJMI)

Process At A Glance

Common Materials

Gypsum/Sandstone, Stainless Steel 420, Stainless Steel 420 Matrix with Bronze Infiltrant

Standard Tolerance

+/- 3% 

Stock Surface Finish

~400 µin Ra

Lead Time

3-10 Business Days

Maximum Size

24x24x24

Minimum Layer Thickness

0.004" (0.100mm)

Minimum Feature Size

0.02" (0.50mm)

Minimum Wall Thickness

0.04" (1mm)

Color Jet Printing is capable of achieving full color prints
Color Jet Printing is capable of achieving full color prints

Advantages

  • Full Color Prints - CJP jetting machines can print in the whole color spectrum
  • Relatively Affordable - A cost effective technology for gypsum or metal prints
  • Material Conservation - Powder can be reused for later prints

Limitations

  • Multiple Steps - Jetting and post processing can extend the time needed to create the design.
  • Simple Geometry - A more challenging post process makes small features and complex designs more challenging to achieve than with other powder bed processes.
  • Low Durability in Green State - Without a post-processing step, parts are highly anisotropic and typically fragile in the Z direction. Solutions including dipping it in acrylate for gypsum parts or fully sintering for metal parts.

 

A binder jetting print in gypsum powder.  The post-process removal of the parts is underway.  Photo Credit: Accendi
A binder jetting print in gypsum powder. The post-process removal of the parts is underway. Photo Credit: Accendi

Binder Jetting with Metal Infiltration

Example Machines

  • 3D Systems ProJet CJP 660Pro
  • ExOne M-Flex
  • ExOne S Max
  • ZCorp ZPrinter 650

Example Materials

  • Visijet PXL
  • Full Color Sandstone
  • Sand
  • Stainless Steel 316 matrix infiltrated with bronze
  • Stainless Steel 420 matrix infiltrated with Bronze