Metal injection moulding for automotive applications

Mathew, Boney A.; Mastromatteo, Richard

doi:10.1016/s0026-0657(02)85078-0

Cited by 19 publications

(9 citation statements)

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“…The relatively long time associated with thermal debinding is greatly reduced using an organic solvent or in some cases even water to dissolve the soluble components of the binder, in the so called solvent debinding (Tandon, 2008). The catalytic debinding, in turn, focus in a solid-to-vapor catalytic degradation, as it is the case of exposing acetal-polyolefin-based feedstocks to acid vapors, resulting in much faster binder removal and superior handling strength when compared to thermal or solvent debinding (Krueger, 1996;Mathew & Mastromatteo, 2003). Nevertheless, it is worth to point out that in all debinding methods, a skeleton of backbone binder often remains to impart adequate strength and shape retention up to the onset of sintering.…”

Section: Wwwintechopencommentioning

confidence: 99%

Powder Injection Molding of Metal and Ceramic Parts

González-Gutiérrez¹,

Stringari²,

Emri³

2012

Some Critical Issues for Injection Molding

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Section: Wwwintechopencommentioning

confidence: 99%

Powder Injection Molding of Metal and Ceramic Parts

González-Gutiérrez¹,

Stringari²,

Emri³

2012

Some Critical Issues for Injection Molding

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“…It combines traditional plastic injection molding and powder sintering technology, providing details of complex geometric shapes in reusable metal tools and reducing or completely eliminating the need for further machining. [11][12][13] …”

Section: Imported High-pressure Pumpmentioning

confidence: 99%

Using Modern Technologies in the Production of Mining Equipment

2018

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Abstract. After a period of operation imported mining equipment starts failing. As a rule, breakages and critical wear of parts do not involve the entire product, but its individual parts. Despite this, manufacturers of this equipment do not provide repair kits, but offer to change the units and assemblies entirely. As a result, the repair and maintenance of imported equipment imposes significant financial costs. This paper proposes ways to eliminate or reduce the additional costs. The problem solution is based on the determination of the chemical composition and structure of worn out or out-of-order parts, reproduction of their manufacturing technology and production of analogues of these parts in single quantities. The work is performed on the example of high-pressure pump parts and large-sized gears used in mining equipment. For high-pressure pumps, analogues of end sealing gaskets and bearing bushings were made. The obtained experience can be used in the manufacturing and restoration of mining equipment in the Kuzbass enterprises, which allows reducing financial costs and implementing import substitution. The research part of the work was performed in the metallurgical laboratories of KuzSTU, and the reproduction of worn out and out-of-order parts was carried out at enterprises which requested this study.

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“…This inherent thermal instability is exploited in an industrial method known as ''metal injection molding'', which allows fine metal powder mixed with a polymer binder to be processed by injection molding, in much the same way as thermoplastic materials [31]. Owing to this low thermal stability, polyacetals can be used only if end-capped with stable groups (acetate or ether).…”

Section: Metal Injection Molding (Mim)mentioning

confidence: 99%

Polymer Degradation and Stabilization

Nguyen¹

2005

Handbook of Polymer Reaction Engineering

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IntroductionMost synthetic plastics and natural polymers are principally constituted of the elements C, H, N, and O, all of which are primary components of organic molecules. As with smaller organic molecules, these atoms are attached by relatively weak covalent bonds that are susceptible to chemical attack, particularly to oxidative degradation. During their potential lifetime, engineering plastics are exposed to diverse environmental factors which can act alone or in combination to adversely affect the initial material properties. These changes generally occur over several years, but can be accelerated or retarded in the presence of internal and external elements temperature, and temperature variations. Environmental factors that contribute to degradation include mechanical stresses, temperature variations, humidity, sunlight, oxygen, atmospheric pollutants, and microbial enzymes. Depending on the structural level at which material changes occur, it is usual to distinguish between physical, physicochemical, and chemical degradation.Physical degradation, commonly known as physical aging, results from changes in the thermodynamic state of the system (temperature, pressure, molar volume) during the daily use of the material. During processing, chains may be oriented and the sample inhomogeneously cooled, resulting in internal stress. With time, the chains have the opportunity to relax from their nonequilibrium conformations to a state of lower free energy. Partly immiscible blends, for instance, can remain in a homogeneous metastable state for an extended period of time. The presence of stress or heat can accelerate the phase separation process. The resultant changes in orientation, free volume, internal stress, crystalline content, and

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Metal injection moulding for automotive applications

Cited by 19 publications

References 1 publication

Powder Injection Molding of Metal and Ceramic Parts

Powder Injection Molding of Metal and Ceramic Parts

Using Modern Technologies in the Production of Mining Equipment

Polymer Degradation and Stabilization

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