Books and journals Case studies Expert Briefings Open Access
Advanced search

A novel solid freeforming method using simultaneous part and mould construction

S. Yang (Department of Materials, Queen Mary, University of London, London, UK)
M.M. Mohebi (Department of Materials, Queen Mary, University of London, London, UK Department of Materials, Faculty of Engineering, Imam Khomeini International University, Qazvin, Iran)
J.R.G. Evans (Department of Materials, Queen Mary, University of London, London, UK)

Rapid Prototyping Journal

ISSN: 1355-2546

Publication date: 18 January 2008

Abstract

Purpose

–

The purpose of this paper is to present a new powder‐based solid freeforming method based on conventional furnace sintering after co‐deposition of mould and part powder materials.

Design/methodology/approach

–

Based on acoustic powder deposition, both mould and part powder materials are delivered simultaneously into the forming area according to the cross section of the 3D computer file. The part is formed in the form of loose powder surrounded by the mould powder again in a loose state. The whole assembly can then be sintered by a conventional method and the mould powder, which has a higher sintering temperature than that of part powder, remains in the loose state after sintering and can be removed.

Findings

–

Complex‐shaped components containing re‐entrant cavities and the capability of being made with 3D functional gradients can be rendered directly as a powder preform suitable for subsequent compaction or direct sintering in a conventional furnace. The flowability and compatibility of the powders need to be selected carefully and the track distance between part/mould powders is important for forming a vertical wall.

Research limitations/implications

–

The main factors affecting building from powder tracks are identified, including the effect of track distance at an interface on integrity, discontinuous feeding on bends and the effects of fill strategies. The flow rates of the part and mould powder as well as their geometrical maps are controlled computationally. Materials and instrumental aspects are discussed.

Originality/value

–

This paper describes a method to produce complex‐shaped object without residual stress and expensive lasers and the process could be modified to include 3D functional gradients.

Keywords

  • Powders
  • Rapid prototypes

Citation

Yang, S., Mohebi, M.M. and Evans, J.R.G. (2008), "A novel solid freeforming method using simultaneous part and mould construction", Rapid Prototyping Journal, Vol. 14 No. 1, pp. 35-43. https://doi.org/10.1108/13552540810841544

Download as .RIS

Publisher

:

Emerald Group Publishing Limited

Copyright © 2008, Emerald Group Publishing Limited

Please note you do not have access to teaching notes

You may be able to access teaching notes by logging in via Shibboleth, Open Athens or with your Emerald account.
Login
If you think you should have access to this content, click the button to contact our support team.
Contact us

To read the full version of this content please select one of the options below

You may be able to access this content by logging in via Shibboleth, Open Athens or with your Emerald account.
Login
To rent this content from Deepdyve, please click the button.
Rent from Deepdyve
If you think you should have access to this content, click the button to contact our support team.
Contact us
Emerald Publishing
  • Opens in new window
  • Opens in new window
  • Opens in new window
  • Opens in new window
© 2021 Emerald Publishing Limited

Services

  • Authors Opens in new window
  • Editors Opens in new window
  • Librarians Opens in new window
  • Researchers Opens in new window
  • Reviewers Opens in new window

About

  • About Emerald Opens in new window
  • Working for Emerald Opens in new window
  • Contact us Opens in new window
  • Publication sitemap

Policies and information

  • Privacy notice
  • Site policies
  • Modern Slavery Act Opens in new window
  • Chair of Trustees governance statement Opens in new window
  • COVID-19 policy Opens in new window
Manage cookies

We’re listening — tell us what you think

  • Something didn’t work…

    Report bugs here

  • All feedback is valuable

    Please share your general feedback

  • Member of Emerald Engage?

    You can join in the discussion by joining the community or logging in here.
    You can also find out more about Emerald Engage.

Join us on our journey

  • Platform update page

    Visit emeraldpublishing.com/platformupdate to discover the latest news and updates

  • Questions & More Information

    Answers to the most commonly asked questions here