The Effect of a Thin-Wall Casting Mould Cavity Filling Conditions on the Casting Surface Quality

Trytek, A.; Orłowicz, A. W.; Tupaj, M.; Mróz, M.; Markowska, O.; Bąk, Grzegorz; Abram, Timothy J.

doi:10.1515/afe-2016-0113

Cited by 12 publications

(15 citation statements)

References 3 publications

(3 reference statements)

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“…On the basis of the aforementioned and pursuant to the described experiments and expressed mutual relations between the observed and evaluated factors influencing the die casting process and the experiments described in the professional literature [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 ], the mutual correlation between the gate structure, the mechanical properties of the casting, its structural composition, and the technological parameters can be expressed as in Figure 8 .…”

Section: Discussionmentioning

confidence: 99%

“…The structure of the gating system itself performs a significant function in reduction of gas retention in the melt volume and in decrease of porosity. The die casting process can be modified and the occurrence of defects can be reduced when both the gate and venting system are changed on the level of structural design of the mold according to the melt flow observed in the mold [11][12][13]. It is obvious that the porosity values and the amount of gas retained in the melt volume are influenced by the correlation of several structural nodes within the gating system beginning with correct gate design, sprues, overflow basins, and venting channels.…”

Section: Introductionmentioning

confidence: 99%

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Possibility of Utilization of Gate Geometry to Modify the Mechanical and Structural Properties of Castings on the Al-Si Basis

et al. 2020

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The mechanical properties of die castings correlate with the inner structure of a casting, distribution of the eutectic phases, and with the content and distribution of porous cavities in the casting volume. This submitted paper deals with the issue of the possibility to influence the basic parameters affecting the quality of castings through structural modifications of the gating system. The structural parameter under assessment is the gate height. In the case of the diverse height of the gate, five sets of castings were produced. The individual sets of castings were subjected to examination of selected mechanical properties, i.e., of permanent deformation and surface hardness. At the same time, the individual sets of castings were subjected to metallographic examination of the eutectic structure of the casting. It was proved that the gate height influences the aforementioned properties of the castings and significantly affects the ratio of the eutectic phases in the volume of the casting. The conclusion describes the mutual correlation between the gate structure, the mechanical properties of the casting, and its structural composition.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Possibility of Utilization of Gate Geometry to Modify the Mechanical and Structural Properties of Castings on the Al-Si Basis

et al. 2020

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“…Composite materials can be divided depending on the production method, intended use, technological properties, and depending on the matrix as well. Metal matrix composites are currently produced with a variety of methods, which include but are not limited to [ 2 , 3 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 ]: Liquid matrix technologies (only these will be the subject of this paper because it concerns defects of castings); Deformation technologies, i.e., those that use plastic processing methods; Sinter technologies. …”

Section: Classification Of Metal Matrix Compositesmentioning

confidence: 99%

Decision Support System in the Field of Defects Assessment in the Metal Matrix Composites Castings

et al. 2020

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This paper presented a new approach to decision making support of defects assessment in metal matrix composites (MMC). It is a continuation of the authors’ papers in terms of a uniform method of casting defects assessment. The idea of this paper was to design an open-access application (follow-up system called Open Atlas of Casting Defects (OACD)) in the area of industry and science. This a new solution makes it possible to quickly identify defect types considering the new classification of casting defects. This classification complements a classical approach by adding a casting defect group called structure defects, which is especially important for metal matrix composites. In the paper, an application structure, and the possibility of its use in casting defects assessment were introduced.

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“…Reaching the high quality of die casting depends on the filling mechanism of the mold cavity by the molten metal. The filling mode is influenced by a number of factors including the shape and the capacity of the cast, weight ratio between the cast and the mold, arrangement of the gating system, shape and area of the gate, volume of mold cavity, area and arrangement of venting holes [ 13 , 15 ]. It has been proved that approximately 90% of defects occurring in the components produced in the die casting process are caused by the errors of the mold design [ 16 , 17 , 18 ].…”

Section: Introductionmentioning

confidence: 99%

“…The objective pursued is to achieve reduction of distribution of gases to the cast volume during die casting cycle. On the basis of knowledge and information published in [ 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 22 , 23 , 24 , 25 , 26 , 27 , 28 ] it is possible to understand the system of filling chamber—shaping cavity—as a closed system (pipeline). On the basis of hydrodynamics it can be thus assumed that velocity in the gate with preservation of constant flow rate of the melt is influenced by the cross section of the gate or by velocity of the piston.…”

Section: Introductionmentioning

confidence: 99%

Research and Evaluation of the Influence of the Construction of the Gate and the Influence of the Piston Velocity on the Distribution of Gases into the Volume of the Casting

et al. 2021

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Distribution of gasses to the cast volume and volume of pores can be maintained within the acceptable limits by means of correct setting of technological parameters of casting and by selection of suitable structure and gating system arrangement. The main idea of this paper solves the issue of suitability of die casting adjustment—i.e., change of technological parameters or change of structural solution of the gating system—with regards to inner soundness of casts produced in die casting process. Parameters which were compared included height of a gate and velocity of a piston. The melt velocity in the gate was used as a correlating factor between the gate height and piston velocity. The evaluated parameter was gas entrapment in the cast at the end of the filling phase of die casting cycle and at the same time percentage of porosity in the samples taken from the main runner. On the basis of the performed experiments it was proved that the change of technological parameters, particularly of pressing velocity of the piston, directly influences distribution of gasses to the cast volume.

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The Effect of a Thin-Wall Casting Mould Cavity Filling Conditions on the Casting Surface Quality

Cited by 12 publications

References 3 publications

Possibility of Utilization of Gate Geometry to Modify the Mechanical and Structural Properties of Castings on the Al-Si Basis

Possibility of Utilization of Gate Geometry to Modify the Mechanical and Structural Properties of Castings on the Al-Si Basis

Decision Support System in the Field of Defects Assessment in the Metal Matrix Composites Castings

Research and Evaluation of the Influence of the Construction of the Gate and the Influence of the Piston Velocity on the Distribution of Gases into the Volume of the Casting

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