Optimization of Master Alloy Amount and Gating System Design for Ductile Cast Iron Obtain in Lost Foam Process

Just, Paweł; Kaczorowski, Rafał; Pacyniak, T.

doi:10.2478/afe-2013-0056

Cited by 2 publications

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“…These results are consistent with the results presented in [ 1 ], in [ 14 , 29 ], and in [ 30 , 31 , 32 ], which proves that there is a better way to design a sprue that allows for the elimination of undesirable turbulence and entrainment. Such analyses have been carried out not only for typical gravity castings but also for high-pressure die casting [ 33 ], investment casting [ 34 ], and the lost foam process [ 35 ] with and without filters in the gating system [ 36 ]. In some cases, the geometry of the gating system, mostly the sprue, can significantly affect the processes occurring in the casting mold, for example, ductile cast iron casting manufacturing using the in-mold nodularization method [ 37 ].…”

Section: Introductionmentioning

confidence: 99%

The Importance of the Geometry of the Down Sprue in the Gravity Casting Process

2022

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This article presents the results of experiments on the optimization of down sprue geometry in the process of pouring sand molds. Theoretical assumptions and computer simulation tests are presented. The starting point was the theory and experience of gas entrapment caused mainly by a poorly designed gating system and the down sprue. Simulations were performed using Magmasoft software. First, initial studies were carried out to determine how the geometry (mainly the channel cross-section) of the sprue affects the problem, and then a detailed experiment was carried out on the so-called ‘short sprue’ version. The air entrapment process was analyzed, as were the parameters of the liquid alloy flow that passes through the analyzed channels. Nine geometric versions of the sprue were proposed and analyzed, and the results allowed us to conclude which sprue geometry is the best from the point of view of minimization of the gas entrapment problem.

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Section: Introductionmentioning

confidence: 99%

The Importance of the Geometry of the Down Sprue in the Gravity Casting Process

2022

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“…The geometry of the whole gating system and consequently the manner the liquid metal is supplied to the mould's cavity, together with the type of the material out of which the gating system is made, may have a significant influence on the process of filling the mould' cavity, and thus on the quality of the casting [1][2][3][4][5][6][7][8][9][10]. The quality of the material as well as the technology of making the semi-finished products in a form of profiles having direct contact with the liquid metal during the process of filling translates directly into the quality of the finished product, i.e.…”

Section: Introductionmentioning

confidence: 99%

Investigation of an Advanced Cellulose Profile Used for the Manufacture of Gating Systems

Zawieja¹,

Sawicki²,

Gumienny³

et al. 2014

Archives of Foundry Engineering

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The herein paper contains the results of investigations on a new type of cellulose blend used for the manufacture of profiles applied in the process of making gating systems in the foundry industry. A standard cellulose profile was subjected to an experiment. During the experiment the profile was filled with a liquid cast iron and at the same time the temperatures of the liquid metal crystallizing inside the profile were measured as well as the temperature of the outer layer of the profile was controlled. Further, the microstructure of the cast iron, which crystallized out inside the cellulose profile, was analysed and the cellulose, thermally degraded after the experiment, was verified with the use of the chemical analysis method. Moreover, a quality analysis of the original as well as the degraded cellulose profile was run with the use of the FTIR infrared spectroscopy. The presented results revealed that the cellulose blend is aluminium silicate enriched and contains organic binder additives. The cast iron, which crystallized out, tended to have an equilibrium pearlitic structure with the release of graphite and carbides. The generation of disequilibrium ausferrite phases was also observed in the structure.

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Optimization of Master Alloy Amount and Gating System Design for Ductile Cast Iron Obtain in Lost Foam Process

Cited by 2 publications

References 0 publications

The Importance of the Geometry of the Down Sprue in the Gravity Casting Process

The Importance of the Geometry of the Down Sprue in the Gravity Casting Process

Investigation of an Advanced Cellulose Profile Used for the Manufacture of Gating Systems

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