Advances in Near Net Shape Polymer Manufacturing Through Microcellular Injection Moulding

Metal Injection Moulding of Low Interstitial Titanium

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.520.145 ◽

2012 ◽

Vol 520 ◽

pp. 145-152 ◽

Cited By ~ 6

Author(s):

Alfred T. Sidambe ◽

Fatos Derguti ◽

Iain Todd

Keyword(s):

Injection Moulding ◽

Cost Effective ◽

Metal Injection Molding ◽

Mechanical Parts ◽

Metal Injection Moulding ◽

Cost Effective Method ◽

Oxygen Contamination ◽

Key Points ◽

Near Net Shape ◽

Cp Ti

Metal injection molding (MIM) is a well-established, cost-effective method of fabricating small-to-moderate size near net-shape metal components. In the MIM of titanium (Ti), one of the key points in the process is the interstitial contamination, especially oxygen. This study examines the sources of interstitial contamination during the metal injection moulding of commercially pure (CP-Ti) and Ti6Al4V (Ti-64) alloys. Also presented is a route to control and minimize the contamination in the sintered parts. The effect of the levels of oxygen contamination on the mechanical parts is also presented in the work.

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An Intelligent Manufacturing Advisor for Casting and Injection-Moulding Based on a Mid-Surface Approach

Volume 1: 22nd Computers and Information in Engineering Conference ◽

10.1115/detc2002/cie-34497 ◽

2002 ◽

Cited By ~ 1

Author(s):

Helen L. Lockett ◽

Marin D. Guenov

Keyword(s):

Injection Moulding ◽

Feature Recognition ◽

Intelligent Manufacturing ◽

Solid Model ◽

Surface Approach ◽

Knowledge Based ◽

Solid Geometry ◽

Near Net Shape ◽

Manufacturing Features

Products that are manufactured using near net-shape manufacturing processes must be designed with regard to the constraints of the manufacturing process. The purpose of this research project is to develop a knowledge based manufacturing advisor to assist designers of products for casting and injection moulding. The manufacturing advisor is tightly integrated with a CAD solid modeller, and uses a novel feature recognition approach to identify the manufacturing features of the part. A mid-surface abstraction from the part’s solid geometry is used as the basis for feature recognition, and it is argued that this is a better approach to feature recognition for this class of parts than a CAD solid model. Initial testing indicates that the feature recognition process is able to effectively recognise a range of features but that the quality of the feature recognition is dependent on the mid-surface representation that is generated.

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Metal Injection Moulding of Superelastic TiNi Parts

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.704.173 ◽

2016 ◽

Vol 704 ◽

pp. 173-182 ◽

Cited By ~ 3

Author(s):

J. Eric Bidaux ◽

Alexandra Amherd Hidalgo ◽

Hervé Girard ◽

Mikel Rodriguez-Arbaizar ◽

Lionel Reynard ◽

...

Keyword(s):

Electron Microscopy ◽

Injection Moulding ◽

Room Temperature ◽

X Ray Diffraction ◽

X Ray ◽

Metal Injection Moulding ◽

Shape Memory Properties ◽

Production Techniques ◽

Near Net Shape ◽

Scanning Electron

TiNi shape-memory properties are successfully used today for the fabrication of various technical devices. The limited machinability and high cost of TiNi encourage the use of near-net shape production techniques such as metal injection moulding. In this work TiNi alloys tensile test specimens are produced by metal injection moulding from pre-alloyed powders. A binder based on a mixture of polyethylene, paraffin wax and stearic acid is used. Parts with a density of about 96.6% of theoretical density are obtained. Scanning electron microscopy coupled with EDX measurements reveals a microstructure consisting of a TiNi matrix with small Ti4Ni2Ox and TiC inclusions. DSC and X-ray diffraction observations indicate the presence of additional Ni4Ti3 precipitates. The parts exhibit full superelasticity at room temperature even for strains of up to 4%, without the need for additional thermal post-treatments. Ultimate tensile strengths up to 980 MPa are obtained.

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