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Advance in Metal Injection Molding
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Advance in Metal Injection Molding

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Manufacturing Processes and Systems".

Deadline for manuscript submissions: closed (29 February 2020) | Viewed by 7060

Special Issue Editor

Dr. Roberto Spina

E-Mail Website
Guest Editor
Department of Mechanics, Mathematics and Management (DMMM), Politecnico di Bari, Viale Japigia 182, 70126 Bari, Italy
Interests: polymer material conversion technology; thermoplastic injection molding; laser processing; production system optimization and planning
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Metal Injection molding is actually one of the most complex manufacturing processes for producing metal parts. The quality of products strictly depends on several factors, such as the careful mold design, selection of material and process conditions. How to optimize process parameters is the key issue for improving the mechanical performance of a product towards the expected service conditions. In addition, the minimization of the production waste and energy costs can make injection molding a more sustainable manufacturing process.

This Special Issue provides an excellent opportunity for those who are studying and working with metal injection molded parts and all supporting technologies. Research articles, review articles and communications relating to theory, simulation, processes, properties and applications of metal injection molding are all invited for this Special Issue.

Prof. Roberto Spina
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Materials is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Metal Injection Molding
  • Material Characterization
  • Computational Methods
  • Advanced Manufacturing

Published Papers (2 papers)

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Research

12 pages, 12680 KiB  
Article
Fabrication of Micro-Patterned Surface for Pool-boiling Enhancement by Using Powder Injection Molding Process
by Hanlyun Cho, Juan Godinez, Jun Sae Han, Dani Fadda, Seung Mun You, Jungho Lee and Seong Jin Park
Materials 2019, 12(3), 507; https://doi.org/10.3390/ma12030507 - 07 Feb 2019
Cited by 10 | Viewed by 3206
Abstract
In this study, two kinds of copper micro-patterned surfaces with different heights were fabricated by using a powder injection molding (PIM) process. The micro-pattern’s size was 100 μm, and the gap size was 50 μm. The short micro-pattern’s height was 100 μm, and [...] Read more.
In this study, two kinds of copper micro-patterned surfaces with different heights were fabricated by using a powder injection molding (PIM) process. The micro-pattern’s size was 100 μm, and the gap size was 50 μm. The short micro-pattern’s height was 100 μm, and the height of the tall one was 380 μm. A copper powder and wax-polymer-based binder system was used to fabricate the micro-patterned surfaces. The critical heat flux (CHF) and heat transfer coefficient (HTC) during pool-boiling tests were measured with the micro-patterned surfaces and a reference plain copper surface. The CHF of short and tall micro-patterned surfaces were 1434 and 1444 kW/m2, respectively, and the plain copper surface’s CHF was 1191 kW/m2. The HTC of the plain copper surface and the PIM surface with short and tall micro-patterned surfaces were similar in value up to a heat flux 1000 kW/m2. Beyond that value, the plain surface quickly reached its CHF, while the HTC of the short micro-patterned surface achieved higher values than that of the tall micro-patterned surface. At CHF, the maximum values of HTC for the short micro-pattern, tall micro-pattern, and the plain copper surface were 68, 58, and 57 kW/m2 K. Full article
(This article belongs to the Special Issue Advance in Metal Injection Molding)
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18 pages, 10316 KiB  
Article
Fabrication of Micro-Parts with High-Aspect Ratio Micro-Hole Array by Micro-Powder Injection Molding
by Changrui Wang, Zhen Lu and Kaifeng Zhang
Materials 2018, 11(10), 1864; https://doi.org/10.3390/ma11101864 - 01 Oct 2018
Cited by 8 | Viewed by 3407
Abstract
The present study investigated high-aspect ratio micro-hole array parts which were made by ZrO2 micro-powder with different particle sizes and micro-powder injection molding technology. It analysed the influence of particle sizes on feedstock, debinding and sintering of ceramic nozzles with multi-micro-holes. The [...] Read more.
The present study investigated high-aspect ratio micro-hole array parts which were made by ZrO2 micro-powder with different particle sizes and micro-powder injection molding technology. It analysed the influence of particle sizes on feedstock, debinding and sintering of ceramic nozzles with multi-micro-holes. The forming quality of ceramic nozzles with multi-micro-holes was discussed in this paper. The results show that the two mixed ZrO2 feedstocks have fine uniformity. The average deviation of the feedstock made with 200 nm powder was −2%, and the average deviation of the feedstock made with 100 nm powder was −7.1%. The sample showed certain sintering characteristics which provided better strength (11.10 MPa) to parts after debinding. The linear shrinkage and the density of the two powder samples at different sintering temperatures increased as the sintering temperature increased. If the temperature continued to increase, the linear shrinkage and the density decreased. The highest hardness and flexural strength values of the ZrO2 sample with 200 nm powder used were: 1265.5 HV and 453.4 MPa, and the crystalline particle size was 0.36 μm. The highest hardness and flexural strength values of the ZrO2 sample with 100 nm powder used were: 1425.8 HV and 503.6 MPa, and the crystalline particle size was 0.18 μm. The ceramic nozzles with multi-micro holes shrunk to nearly the same axial, radial and circumferential directions during sintering. After sintering, the roundness of ceramic micro-hole met the user requirements, and the circular hole had a high parallelism in the axial direction. The micropore diameter was 450 ± 5 μm, and it was possible to control the dimensional accuracy within 1.5% after sintering. The study presented a superior application prospect for high-aspect ratio micro hole array parts in aerospace, electronics and biomedicine. Full article
(This article belongs to the Special Issue Advance in Metal Injection Molding)
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