The influence of the riser dimensions on the effectiveness of feeding solidifying cast elements

Sowa, L.; Skrzypczak, Tomasz; Kwiatoń, Paweł

doi:10.1051/matecconf/201925402016

Cited by 3 publications

(2 citation statements)

References 5 publications

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“…Pemodelan matematis dan analisa numerik terkait pengaruh dari bentuk riser terhadap efektifitas feeding sudah dilakukan oleh beberapa peneliti [8], [9]. Untuk bentuk riser silindris, sesaat sebelum proses solidifikasi berakhir, garis pembekuan terdapat di bagian atas dari komponen casting, dimana pada bagian tersebut terdapat shrinkage.…”

Section: Pendahuluanunclassified

Evaluasi Efisensi Riser Untuk Bentuk Riser Samping yang Berbeda Menggunakan Metode Simulasi Casting

Bahari,

Tulung Prayoga

2023

infotekmesin

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As the solidification reaches the hot spot area, no molten metal remains and shrinkage is formed. To anticipate the shrinkage, a riser is added to the casting system. An optimal riser design would produce free shrinkage components. One of the factors that affect riser efficiency is the riser shape. This study aims to find the most efficient side riser shape by using simulation software. The riser shape of tubes, tubes with a half sphere on top, hemispheres, conical tubes, tubes with an oval cross-section, and cubes are used in this experiment, with the volume of all risers kept constant. The most efficient shape of the riser is the tube. The tube riser produces a larger modulus. The tube riser generated directional solidification. The same pattern can be seen in the niyama criteria and solidification temperature, where the tube riser has a more continuous pattern compared to other riser shapes.

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Section: Pendahuluanunclassified

Evaluasi Efisensi Riser Untuk Bentuk Riser Samping yang Berbeda Menggunakan Metode Simulasi Casting

Bahari,

Tulung Prayoga

2023

infotekmesin

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“…In foundry practice, the exothermic insulating riser could increase the temperature of the metal liquid through its heat combustion and delay the solidification of the metal liquid, so that the efficiency of feeding could be increased during casting. Some existing studies had improved the performance or defects of the riser by modeling and computer simulation [1][2][3]. The change in the composition and ratio of the different materials of the riser also affected the casting effect most directly [4].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Performance Optimization of Organosilicon Slag Exothermic Insulating Riser

Lu,

Qian,

Yang

et al. 2022

Archives of Foundry Engineering

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The exothermic insulating riser played an important role in the solidification process of metal liquid for the improvement of casting quality. This paper focused on the use of organosilicon slag to replace part of the aluminum powder as an exothermic agent for the riser, to reduce production costs and turn waste into treasure. The experiments firstly studied the effect of organosilicon slag content on the combustion temperature and holding time and determined the components of the riser exothermic agent and organosilicon slag. On this basis, the effects of the content of Na3AlF6 flux and alkali phenolic resin binder on the combustion heating time and strength properties of the riser were studied. And the ratio of mixed oxidants was determined by single-factor orthogonal experiments to optimize the addition of three oxidants, Fe3O4, MnO2, and KNO3. Finally, the performance of the riser prepared after optimization was compared with that of the riser prepared with general aluminum powder. The results showed that with the mixture of 21% organosilicon slag and 14% aluminum powder as the exothermic agent, the highest combustion temperature of the prepared exothermic insulating riser was 1451℃ and the holding time was 193 s; the optimal content of Na3AlF6 flux was 4%, and the best addition alkali phenolic resin binder was 12%; the optimized mixing ratio of three oxidants was 12% for Fe3O4, 6% for MnO2, and 6% for KNO3. Under the optimized ratio, the maximum combustion temperature of the homemade riser was 52℃ and the heat preservation time was 14% longer compared with the conventional exothermic insulating riser with 25-35% aluminum powder.

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Study on using Casting Simulation Software for Design and Analysis of Riser Shapes in a Solidifying Casting Component

Malik

Sani

Medi

2020

J. Phys.: Conf. Ser.

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Filling and solidification of molten metals are very complex and difficult to simulate correctly by conservative methods. For a large industrial application, it needs an alternate approach that is fast, reliable and user-friendly. In current casting industries, product development paradigm is shifting from traditional trial-and-error in the workshop to computer-aided casting design and simulation package by a computer(s). Computer-aided casting simulation plays an important role in the paradigm of new product development by way of modeling entire casting processes and reveals a dynamic behavior of casting scheme in working conditions. This study, highlighting is given on using casting simulation software which helps foundry industries to design and analysis the size and shape of the riser. Intended for simulation simplification in this study, grain size of mold green sand, casting material quality, casting process parameters are deliberated identical for all design schemes. Only the shape and dimensional variances of sprue/risers are taken into considerations for defects analysis. It is found that defects such as micro and shrinkage porosities, and improper solidification, are directly related to gating and risers system. Casting simulation software is used for mold filling and solidification analysis and it is observed that the proposed gating and risers system design will improve casting results with small defects. From this study, the conclusion can be stated that taper sprue design, also acts as a riser, with an additional four small risers that will produce a small fraction of porosity inside of the casting part. Validation of simulation, in the future, will be proved through experimental trials in the foundry shop.

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The influence of the riser dimensions on the effectiveness of feeding solidifying cast elements

Cited by 3 publications

References 5 publications

Evaluasi Efisensi Riser Untuk Bentuk Riser Samping yang Berbeda Menggunakan Metode Simulasi Casting

Evaluasi Efisensi Riser Untuk Bentuk Riser Samping yang Berbeda Menggunakan Metode Simulasi Casting

Preparation and Performance Optimization of Organosilicon Slag Exothermic Insulating Riser

Study on using Casting Simulation Software for Design and Analysis of Riser Shapes in a Solidifying Casting Component

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