Home » Binder Jetting

Binder Jetting

1993
  • Ely Sachs
  • Michael Cima
Binder jetting machine applying binding agent in additive manufacturing.

Binder jetting is an additive manufacturing process where a liquid binding agent is selectively deposited onto a powder bed using an inkjet-style print head. The print head moves across a layer of powder, depositing binder droplets to join particles together. The build platform then lowers, a new layer of powder is spread, and the process repeats layer-by-layer.

The primary advantage of binder jetting is its speed and scalability, as the inkjet deposition process is typically faster than laser-based methods. It also operates at room temperature, which avoids the thermal stresses and warping common in high-temperature processes. This makes it suitable for a wide range of materials, including sand, metals, ceramics, and polymers. After printing, the part exists in a fragile ‘green state,’ held together only by the binder. It must be carefully excavated from the surrounding loose powder. For metal and ceramic parts, a crucial post-processing step is required to achieve final density and strength. This typically involves sintering in a furnace to burn out the binder and fuse the material particles, a process that causes significant and predictable shrinkage. Alternatively, the green part can be infiltrated with a lower-melting-point metal, such as bronze, to fill the pores and create a dense composite. A unique feature is the ability to incorporate color into the binder, allowing for the creation of full-color 3D models directly from the printer.

UNESCO Nomenclature: 3313
– Industrial technology

Type

Manufacturing Process

Disruption

Substantial

Usage

Widespread Use

Precursors

  • inkjet printing technology developed in the 1970s
  • powder metallurgy for processing powdered materials
  • computer-aided design (cad) for creating digital blueprints
  • traditional sand casting techniques used in foundries
  • development of specialized chemical binding agents

Applications

  • full-color prototypes and architectural models using gypsum powder
  • large sand casting molds and cores for industrial foundries
  • production of metal parts via subsequent sintering or infiltration
  • manufacturing of complex ceramic components
  • high-speed, large-scale part production

Patents:

  • US 5204055 A

Potential Innovations Ideas

Professionals (100% free) Membership Required

You must be a Professionals (100% free) member to access this content.

Join Now

Already a member? Log in here
Related to: binder jetting, 3dp, additive manufacturing, powder bed, inkjet, binder, green part, sintering, infiltration, sand casting.

Leave a Reply

Your email address will not be published. Required fields are marked *

AVAILABLE FOR NEW CHALLENGES
Mechanical Engineer, Project, Process Engineering or R&D Manager
Effective product development

Available for a new challenge on short notice.
Contact me on LinkedIn
Plastic metal electronics integration, Design-to-cost, GMP, Ergonomics, Medium to high-volume devices & consumables, Lean Manufacturing, Regulated industries, CE & FDA, CAD, Solidworks, Lean Sigma Black Belt, medical ISO 13485

We are looking for a new sponsor

 

Your company or institution is into technique, science or research ?
> send us a message <

Receive all new articles
Free, no spam, email not distributed nor resold

or you can get your full membership -for free- to access all restricted content >here<

Historical Context

(if date is unknown or not relevant, e.g. "fluid mechanics", a rounded estimation of its notable emergence is provided)

Related Invention, Innovation & Technical Principles

Scroll to Top

You May Also Like