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1
Content available Optimizing Sand Moulding Process through Regression Models and Destructive Testing
Abdulamer Dheya
Archives of Foundry Engineering
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2023
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Vol. 23, iss. 4
163--168
EN
The main objective of the present study is enhanced of the sand moulding process through addressing the sand mould defects and failures, ultimately lead to improve production of the sand castings with well-defined of pattern profiles. The research aimed to reduce the cost and energy expenditure associated with the compaction time of the sand moulding process. Practical destructive tests were conducted to assess properties of the green sand moulds. Linear regression and multi-regression methods were employed to identify the key factors influencing the sand moulding process. The proposed experimental destructive tests and predicted regression methods facilitated measurement of the green sand properties and enabled evaluation of the effective moulding parameters, thereby enhancing the sand moulding process. Factorial design of experiments approach was employed to evaluate effect of parameters of water content and mixing time of the green sand compaction process on the mechanical properties of green sand mould namely the tensile strength, and compressive strength.
2
Content available Investigation of flowability of the green sand mould by remote control of portable flowability sensor
Abdulamer D.
Archives of Materials Science and Engineering
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2021
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Vol. 112, nr 2
70--76
EN
Purpose: The useful data and information during the sand compaction process steps should be collected. Direct measurement methods of the sand mould properties during the actual moulding process are not adopted yet. Design/methodology/approach: In this work, a remote control system [1] have been integrated into a new flowability sensor [2]. Findings: To overcome the complexity of the tools and equipment that existed in laboratory, and in foundry. Research limitations/implications: In order to investigate, and control behavior of the moulding process of bentonite-bonded green sand process, the sensors have been equipped with the Bluetooth technology for a wireless transmission of the measured data to computers. Originality/value: This technique contributes to improve of the compaction process based on the non-destructive tests, enhances prediction of the optimum parameter conditions, and reduced the energy, and the compaction time consumed for the green sand moulding process.
3
Content available Simulation of the Moulding Process of Bentonite-Bonded Green Sand
Abdulamer D., Kaduaw A.
Archives of Foundry Engineering
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2021
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Vol. 21, iss. 1
67--73
EN
Finite Element Method FEM via commercially available software has been used for numerical simulation of the compaction process of bentonite-bonded sand mould. The mathematical model of soil plasticity which involved Drucker-Prager model match with Mohr Coulomb model was selected. The individual parameters which required for the simulation process were determined through direct shear test based on the variation of sand compactability. The novelty of this research work is that the individual micro-mechanical parameters were adopted depend on its directly proportional to the change of sand density during the compaction process. Boundary conditions of the applied load, roller and fixed constraint were specified. An extremely coarse mesh was used and the solution by time-dependent study was done for investigation of material-dependent behaviour of green sand during the compaction process. The research implemented also simulation of the desired points in sand mould to predict behaviour of moulding process, and prevent failure of the sand mould. Distance dependent displacement and distance-dependent pressure have been determined to investigate the effective moulding parameters without spent further energy and cost for obtaining green sand mould. The obtained numerical results of the sand displacement show good agreement with the practical results.
4
Content available Thermal Conductivity of the Green-Sand Mould Poured with Copper
Krajewski P. K., Piwowarski G., Suchy J. S.
Archives of Foundry Engineering
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2014
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Vol. 14, iss. 4 spec.
67--70
EN
The paper presents results of measuring thermal conductivity of green-sand mould material and time of pure-copper plate castings solidification evaluated from cooling curves. During the experiments pure Cu (99,8 %) plate was cast into the green-sand moulds. Basing on the measurements it was stated that thermal conductivity of the moulding sand has complex temperature variability, especially during the water vaporization and the obtained dependence should be used in the numerical calculations to improve their accuracy.
5
Content available remote Wilgotność masy formierskiej w strefie kondensacji
Szmigielski T.
Archiwum Odlewnictwa
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2003
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R. 3, nr 10
249--254
PL
Opisano stanowisko do ciągłej rejestracji zmian wilgotności masy w strefie kondensacji. Zastosowano mikroprocesorową rejestrację sygnałów pomiarowych. Przedstawiono przykładowe ilustracje zmian wilgotności masy w warstwach oddalonych od powierzchni czołowej próbki.
EN
Work posts for constant recording of mould moisture changes in condensation zone are described. The microprocessor recorder has been used to register the measure signals. Typical examples (pictures or drawings) of moisture changes in the moulding sands in remote layers of the front of the tested sample are shown.
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