Process development for green part printing using binder jetting additive manufacturing

2018 ◽  
Vol 13 (4) ◽  
pp. 504-512 ◽  
Author(s):  
Hadi Miyanaji ◽  
Morgan Orth ◽  
Junaid Muhammad Akbar ◽  
Li Yang
Keyword(s):  
Additive Manufacturing ◽  
Process Development ◽  
Green Part ◽  
Binder Jetting

scholarly journals Effect of Particle Size Distribution on Powder Packing and Sintering in Binder Jetting Additive Manufacturing of Metals

2017 ◽  
Vol 139 (8) ◽  
Author(s):  
Yun Bai ◽  
Grady Wagner ◽  
Christopher B. Williams
Keyword(s):  
Particle Size ◽  
Additive Manufacturing ◽  
Large Degree ◽  
Full Density ◽  
Powder Particle Size ◽  
Powder Mixtures ◽  
Fine Powders ◽  
Sintering Shrinkage ◽  
The Impact ◽  
Binder Jetting

The binder jetting additive manufacturing (AM) process provides an economical and scalable means of fabricating complex parts from a wide variety of materials. While it is often used to fabricate metal parts, it is typically challenging to fabricate full density parts without large degree of sintering shrinkage. This can be attributed to the inherently low green density and the constraint on powder particle size imposed by challenges in recoating fine powders. To address this issue, the authors explored the use of bimodal powder mixtures in the context of binder jetting of copper. A variety of bimodal powder mixtures of various particle diameters and mixing ratios were printed and sintered to study the impact of bimodal mixtures on the parts' density and shrinkage. It was discovered that, compared to parts printed with monosized fine powders, the use of bimodal powder mixtures improves the powder's packing density (8.2%) and flowability (10.5%), and increases the sintered density (4.0%) while also reducing the sintering shrinkage (6.4%).

Establishment of a Competitive Additive Manufacturing Workshop

2016 ◽  
Author(s):  
Paul Ryan ◽  
Jan Schwerdtfeger ◽  
Markus Rodermann
Keyword(s):  
Additive Manufacturing ◽  
Gas Turbines ◽  
High Performance ◽  
Best Practice ◽  
Process Development ◽  
Process Efficiency ◽  
Development Effort ◽  
Industrial Gas Turbines ◽  
High Level ◽  
Design And Manufacture

Compared to conventional manufacturing processes, additive manufacturing offers a degree of freedom that has the potential to revolutionize the turbine components supply chain. Additive manufacturing facilitates the design and manufacture of highly complex components in high performance materials with features that cannot currently be realized with other processes. In addition, shorter development and manufacturing lead-times are possible due to the flexibility of 3D based processing and the absence of expensive, complicated molds or dies. Having been confined for many years to rapid prototyping or R&D applications, additive manufacturing is now making the move to the factory floor. However, a dearth of manufacturing experience makes the development effort and risk of costly mistakes a deterrent for many organizations that would otherwise be interested in exploring the benefits of additive manufacturing. A former manufacturer of industrial gas turbines recently established an additive manufacturing workshop designed to deliver highly complex engine-ready components that can contribute to increased performance of the gas turbine. A strong emphasis on process validation and implementation of the organization’s best practice Lean and Quality methodologies has laid solid foundations for a highly capable manufacturing environment. This paper describes the approach taken to ensure that the workshop achieves a high level of operational excellence. Process development topics explored in the paper include the following: • Planning of process flow and cell layout to permit the maximum lean performance • Strategy used to determine machine specification and selection method. • Assessment of process capability • Influence of design for manufacture on process efficiency and product quality • Experience gained during actual production of first commercial components

scholarly journals Tailoring green and sintered density of pure iron parts using binder jetting additive manufacturing

2018 ◽  
Vol 24 ◽  
pp. 508-520 ◽  
Author(s):  
Issa Rishmawi ◽  
Mehrnaz Salarian ◽  
Mihaela Vlasea
Keyword(s):  
Additive Manufacturing ◽  
Pure Iron ◽  
Sintered Density ◽  
Binder Jetting

Process development for additive manufacturing of functionally graded alumina toughened zirconia components intended for medical implant application

2019 ◽  
Vol 39 (2-3) ◽  
pp. 522-530 ◽  
Author(s):  
Eric Schwarzer ◽  
Stefan Holtzhausen ◽  
Uwe Scheithauer ◽  
Claudia Ortmann ◽  
Thomas Oberbach ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Process Development ◽  
Functionally Graded ◽  
Medical Implant

scholarly journals Powder bed binder jetting additive manufacturing of silicone structures

2018 ◽  
Vol 21 ◽  
pp. 112-124 ◽  
Author(s):  
Farzad Liravi ◽  
Mihaela Vlasea
Keyword(s):  
Additive Manufacturing ◽  
Powder Bed ◽  
Binder Jetting
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