Interface development and numerical simulation of powder co-injection moulding. Part II. Numerical simulation and experimental verification

Lou, Jianzhong; Li, Yimin; He, Hao; Li, Dongyang; Wang, Guangyao; Feng, Juan; Liu, Chen

doi:10.1016/j.powtec.2016.10.016

Cited by 4 publications

(2 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The experimental results, as well as their statistical processing, have shown that a connection radius between the walls of the parts that is as large as possible can cause a reduction in certain tendencies to crack the material. In addition, an appropriate angle of inclination or an optimal ratio between the thicknesses of the walls determines a reduction in the agglomerations of material that can cause inhomogeneities of the structure [ 36 , 37 ].…”

Section: Resultsmentioning

confidence: 99%

Redesign of the Geometry of Parts Produced from PBT Composite to Improve Their Operational Behavior

Dobrotă

Lazăr²

2021

Polymers

View full text Add to dashboard Cite

Parts produced from PBT-GF30 (70% polybutylene terephthalate +30% fiberglass) are very often used in car construction, due to the properties of this material. The current trend is to make parts with a shape designed to be as complex as possible, to take over many functions in operation. During the research, a part that is a component of the structure of car safety systems, and that must be completely reliable in operation, was analyzed. This piece has a complex shape that involves the intersection of several walls. Thus, the research aimed at establishing the optimal radius of connection between the walls (R), the ratio between the thickness of the intersecting walls (K) and the angle of inclination of the walls (α). The composite central design method was used to design the experiments. Both new parts and parts subject to an artificial aging process were tested. All parts were subjected to shear stress, to determine the load (L) and displacement (D) at which they break. In order to observe other changes in the properties of the parts, in addition to the mechanical ones, an analysis of the color of the new and aged parts was performed, as well as a topography of the surface layer in the breaking area. The design of the parts involved changes to the parameters of the injection process. In these conditions, a PBT-GF30 viscosity analysis was performed for new and artificially aged parts.

show abstract

Section: Resultsmentioning

confidence: 99%

Redesign of the Geometry of Parts Produced from PBT Composite to Improve Their Operational Behavior

Dobrotă

Lazăr²

2021

Polymers

View full text Add to dashboard Cite

show abstract

“…Metal injection moulding (MIM) is a novel net shape method for producing stainless steel parts with high performance and complex shapes [1,2]. In the MIM process, metal powder is mixed with a polymer binder to yield the feedstock, which is then injected into a mould with the required shape.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Decarburization Behaviour during the Sintering of Metal Injection Moulded 420 Stainless Steel

Lou

Liu

et al. 2020

Metals

Self Cite

View full text Add to dashboard Cite

The decarburization behaviour during the sintering of metal-injection-moulded 420 stainless steel was investigated. Particular attention has been paid to the decarburization mechanisms and carbon distribution of parts sintered at different temperatures. The results indicate that the loss of carbon content occurs mainly through the reduction of surface oxides of powder particles or reaction with the atmosphere. Depending on the densification level, the sintering decarburization is separated into two stages. Below 1200 °C, decarburization occurs at the powder particle surface. The surface oxides react with the amorphous carbon or residual organics to pose the metal surface. At this time, the carbon content distribution of the sintered body is similar to that of the as-debound sample. The reduction of surface oxides promotes sintering. At 1200 °C, the densification speed is higher in the centre region of the sample, where the interconnected pores close and the second stage of decarburization takes place. At temperatures above 1200 °C, carbon atoms in the inner layers must migrate to the surface to react with the atmosphere. The decarburization speed is reduced and the carbon content distribution of the as-sintered part is similar to that of the dense decarburized part.

show abstract

Controlling the sintering response in the development of multilayered components produced via powder injection molding route—a review

Ojo-Kupoluyi

Tahir

Dele‐Afolabi

et al. 2020

Int J Adv Manuf Technol

View full text Add to dashboard Cite

Interface development and numerical simulation of powder co-injection moulding. Part II. Numerical simulation and experimental verification

Cited by 4 publications

References 20 publications

Redesign of the Geometry of Parts Produced from PBT Composite to Improve Their Operational Behavior

Redesign of the Geometry of Parts Produced from PBT Composite to Improve Their Operational Behavior

Investigation of Decarburization Behaviour during the Sintering of Metal Injection Moulded 420 Stainless Steel

Controlling the sintering response in the development of multilayered components produced via powder injection molding route—a review

Contact Info

Product

Resources

About