Frictional-kinetic modeling and numerical simulation of core shooting process

Ni, Chang-jiang; Guo, Enyu; Zhang, Qingdong; Jing, Tao; Wu, Jiun-Huei Proty

doi:10.1080/13640461.2015.1126404

Cited by 7 publications

(3 citation statements)

References 29 publications

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“…The TFM based on Eulerian-Eulerian theory treats both particles and gas phases as interpenetrating continua. 9,10 The kinetic theory of granular flow (KTGF), which can be used to close the constitutive relations for solid phase, has been added to two-fluid models to simulate dilute gas-solid flows. [11][12][13] Depending on using appropriate model and boundary conditions, accurate prediction can be made on the gas-solid interaction.…”

Section: Introductionmentioning

confidence: 99%

Simulation of Sand Filling Process and Analysis of Flow Behavior with Different Binder Ratio

et al. 2019

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Core shooting process has a great influence on the quality of sand cores. At present, there are two computational fluid dynamic models applied to simulate the hydrodynamics of core shooting process. In this paper, a two-fluid model (TFM) simulation is made on fluid dynamic analysis. With validation of experimental results and discrete particle model (DPM) simulations, the TFM is able to predict a reasonable flow behavior of sand particles by gas dynamic pressure analysis. Residual gas distribution of sand filling process is analyzed and a good agreement is achieved between air volume fraction simulation based on TFM and experimental results. A comparison between different binder ratios is made. The binder ratio has a significant effect on sand hydrodynamic behavior and the sand volume fraction.

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Section: Introductionmentioning

confidence: 99%

Simulation of Sand Filling Process and Analysis of Flow Behavior with Different Binder Ratio

et al. 2019

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“…Out of the parameters deciding on the processes of the mould cavity filling and moulding sand compaction the influence of such factors as: kind of the core sand and its reclaim [1][2][3][4][5][6][7][8][9], complication of the core shape, shooting pressure value, recommended surfaces and dimensions of shooting and venting holes, should be taken into account. The mentioned subjects, concerning traditional core binders (oil or linseed varnish, water glass, some resins for the hot-box process), were previously investigated [10][11][12][13][14][15][16][17][18], while analogous investigations for core sands with the inorganic Cordis binder -introduction of which into the foundry practice holds promise of decreasing pollution of the natural environment -were not performed.…”

Section: Introductionmentioning

confidence: 99%

Archives of Metallurgy and Materials

Dańko

2018

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The results of studies of the cores production by blowing methods with utilising the modified experimental shooting machine SR-3D, are provided in the hereby paper. The core sands from the Cordis technology were applied in the presented investigations. The influence of the number and distribution of vents on the shaped core box filling, filmed by a digital camera, was determined. Investigations were performed for the shooting pressures of 0.4, 0.5 and 0.6 MPa and for three surfaces of the shooting hole, at various numbers and distribution ways of vents in the experimental core box. The selected results of the model investigations were compared with the results of simulations performed previously in the PROCAST programme.The intensity of the core sand outflow from the shooting chamber into the core box of the experimental shooting machine was measured. Technological effects were assessed on the basis of the core sand apparent density in individual parts of the core, in dependence on the character of the pressure increase in the shooting chamber and the pressure value obtained in the core box.

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“…The blowing process [1][2][3][4][5][6][7][8] of molding sand compaction and its hardening (during which, a sand-air flux is introduced into a mold cavity and followed by successive flows of air and a hardening factor -one after another -into venting holes) is burdened with at least two disadvantages. The first one constitutes the diversification of the molding sand compaction within the core volume, especially visible when the sand is shot through individual shooting holes, since it leads to a significantly higher apparent density in the shooting hole axis.…”

Section: Introductionmentioning

confidence: 99%

Density Distribution and Resin Migration Investigations in Samples of Sand Core Made by Blowing Method

Dańko

Jamrozowicz

2017

jcme

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Resin migration in a core can occur during the core production process performed by blowing methods in which the core sand is transported into the core box as a two-phase sand-air flux characterized by various working parameters (working pressure, shooting time, volumetric concentration). This migration is the result of the resin being blown off from the matrix grain surfaces by compressed air. The methodology of the investigation of this effect developed at AGH University of Science and Technology is presented in this paper. The results of the resin migration tests obtained for cores made with cold-box technology at various working parameters of the shooting process are also shown.

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Frictional-kinetic modeling and numerical simulation of core shooting process

Cited by 7 publications

References 29 publications

Simulation of Sand Filling Process and Analysis of Flow Behavior with Different Binder Ratio

Simulation of Sand Filling Process and Analysis of Flow Behavior with Different Binder Ratio

Archives of Metallurgy and Materials

Density Distribution and Resin Migration Investigations in Samples of Sand Core Made by Blowing Method

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