Wear resistant tools for reproduction technologies produced by micro powder metallurgy

Rota, Astrid; Duong, Ta; Hartwig, T.

doi:10.1007/s005420100101

Cited by 43 publications

(22 citation statements)

References 2 publications

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“…Micro metal injection molding (lMIM) is a potential process for the mass production of complex metal microstructures and microparts (Tay et al 2005;Ruprecht et al 2002;Tomlin 2000;Rota et al 2002). Some application areas are in micro drive technology (microgear), medical technology and hard metal mold insert for micro plastic injection molding (Ruprecht et al 2002;Tomlin 2000;Rota et al 2002). lMIM is a miniaturized variant of conventional metal injection molding (MIM) process.…”

Section: Introductionmentioning

confidence: 99%

Analysis of demolding in micro metal injection molding

Loh

Tor

et al. 2006

Microsyst Technol

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In this paper micro metal injection molding (lMIM) is being studied to produce 316L stainless steel microstructures. Experimental work showed that demolding failure was a serious hindrance to the success of lMIM as a suitable technology to produce small microstructures. Thus, a theoretical analysis of microstructure demolding in lMIM is needed in order to understand the demolding behavior theoretically and how to avoid demolding failure in lMIM. In this paper, theoretical analysis of the demolding of 24·24 (totally 576) microstructures was conducted with the help of Abaqus finite element analysis software. The analysis was involved in two factors that possibly lead to demolding failure: one is the shear stress during ejection of the microstructure due to contact pressure between the microstructure and the microcavity, the other is thermally-induced stress due to cooling of the microstructure. The analysis shows that the following factors have significant influence on the demolding: aspect ratios of the microstructure, the coefficient of friction between the microstructure and the microcavity, demolding temperature and holding pressure. And the microstructure that is farther away from the centerline of the round part with microstructures undergoes higher stress and more easily subject to breakage. The moment when the microstructure is the most possibly subject to breakage during demolding is always the onset of ejection.

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Section: Introductionmentioning

confidence: 99%

Analysis of demolding in micro metal injection molding

Loh

Tor

et al. 2006

Microsyst Technol

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“…Micropowders of metals and ceramics have been used in injection molding or embossing [28][29][30]. The particles fuse together and form a continuous structure when they are sintered.…”

Section: Article In Pressmentioning

confidence: 99%

Nanopowder molding method for creating implantable high-aspect-ratio electrodes on thin flexible substrates

Zhou

Greenberg

et al. 2006

Biomaterials

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“…The μPIM technology has been applied to producing the wear resistant mold cavity of cemented carbides for the microparts, aiming at overcoming the shortcomings of current production technologies [16] . However, the surface roughness of the cavity is still too high to meet the requirement of large scale production.…”

Section: Fabrication Of the Microparts In Large Scalementioning

confidence: 99%

Micro powder injection molding—large scale production technology for micro-sized components

Yin

Jia

2008

Sci. China Ser. E-Technol. Sci.

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Micro powder injection molding (μPIM), a miniaturized variant of powder injectionmolding, has advantages of shape complexity, applicability to many materials and good mechanical properties. Co-injection molding has been realized between metals and ceramics on micro components, which become the first breakthrough within the PIM field. Combined with the prominent characteristics of high features/ cost ratio, micro powder injection molding becomes a potential technique for large scale production of intricate and three-dimensional micro components or microstructured components in microsystems technology (MST) field. micro injection molding, co-injection molding, large scale production, microsystems technologyThe rapid development of microsystems technology (MST) has created a great demand for the production of 3-D micro-sized components, such as micro sensors, microparts and micro reactors, to meet the requirements of both high quality and low cost. Many conventional production techniques, however, are incapable of fabricating such small parts. And the current microsystem production technologies, such as micro cutting, laser ablation, silicon etching, LIGA and so on, are not competitive for their high cost, low efficiency or limited materials applied. Micro powder injection molding (μPIM), a technology which applies the powder injection molding to the production of parts with micro size, emerges as an alternative to fabricate the micro components in large scale with metals, alloys and ceramics.

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Wear resistant tools for reproduction technologies produced by micro powder metallurgy

Cited by 43 publications

References 2 publications

Analysis of demolding in micro metal injection molding

Analysis of demolding in micro metal injection molding

Nanopowder molding method for creating implantable high-aspect-ratio electrodes on thin flexible substrates

Micro powder injection molding—large scale production technology for micro-sized components

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