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Your search for moulding sand resulted in 30 matches...

APPLICATION OF MOULDING SANDS WITH GEOPOLYMER BINDER IN THE MANUFACTURE OF CASTINGS FROM ALUMINIUM ALLOYS


The article presents the results of laboratory tests on the binding characteristics of moulding sands with inorganic geopolymer binders and for comparison with furan resin and alkaline resin, designed for casting o...

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MODEL STUDIES OF SAND RECLAMATION FROM THE WASTE MOULDING MIXTURES WITH NEW INORGANIC BINDER USED FOR CASTING OF ALUMINIUM ALLOYS


The article presents the results of model tests and studies of the sand reclamation from waste moulding and core mixtures with an inorganic geopolymer binder, used in the trial production of pilot castings...

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EFFECT OF ULTRASOUNDS ON LOW-ENERGY PROCESSES AND ELECTROLYTIC CONDUCTIVITY OF MOULDING DUST WASTE SUBJECTED TO ADVANCED OXIDATION


The article presents the basic characteristics of the pollutants emitted in the process of foundry mould manufacture. A method to reduce harmful emissions through the application of advanced oxidation was described...

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DEVELOPMENT OF TECHNOLOGY TO MANUFACTURE „MODIFIED BENTONITE” USED IN PRODUCTION OF STEEL CASTINGS WITH SPECIAL REGARD TO CASTING SURFACE QUALITY


The article presents the most important results of the research, development and implementation studies carried out under one of the Target Projects as a result of cooperation between the CERTECH Technical and Comm...

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INVESTIGATIONS OF A CORRELATION BETWEEN THE TYPE AND AMOUNT OF MODIFIER, HIGH-TEMPERATURE TRANSFORMATIONS AND RESIDUAL STRENGTH OF SANDS WITH MODIFIED SODIUM SILICATES


The article presents the results of high-temperature investigations of the modified samples of hydrated sodium silicate and of the sand mixtures with an addition of this compound. To improve the knocking out proper...

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NEW COAL DUST SUBSTITUTES FOR BENTONITE MOULDING SANDS USED IN MANUFACTURE OF CASTINGS FROM MALLEABLE IRON AND ALUMINIUM ALLOYS


The article discusses the most important results of research, development and implementation works conducted under Target Projects in years 2006-2007 at the two Polish foundries, i.e. „Radom" Fittings Factory...

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HIGH-QUALITY FOUNDRY BENTONITE MADE FROM THE RAW DRIED MATERIAL AND SELECTED FRACTIONS FORMED IN THE PRODUCTION OF HYGIENE SORBENTS


The paper presents the results of laboratory and industrial tests undertaken in order to develop and implement in foundry production the high-quality bentonite made from the raw dried material and selected fractions formed in the production of hyg...

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Reclamability of moulding sands with new inorganic binders for non-ferrous castings


The article presents results of an investigation which constitutes a section of research under the project POIG.01.01.02-00-015/09 "Advanced materials and technologies", one of the aims which is the introduction of new ecological inorganic binders...

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The application of bentonite in classical moulding sands


The article presents results of laboratory tests to develop a new generation of foundry hybrid bentonite. Hybrid bentonite is intended for use as binder for synthetic moulding sands and sandmixes. In the previous practice foundry bentonite was a p...

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The ecological aspect of moulding sands with new inorganic binders in the process of pouring moulds with liquid metal


One of the factors which influence development tendencies within the scope of moulding sands used in foundry practice is environmental protection. Hence, while assessing technologies, the composition of utilised materials and emissions of harmful ...

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The ecological and material-saving technology for producing brake blocks with stable parameters of quality. Part 1. Technology modernization using computer simulation


The presented article is the first in the series, which presents research related to the improvement of technology for producing brake blocks for the railway industry in the Spomel foundry in Lębork.The cooperation with the Foundry Research...

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The ecological and material-saving technology for producing brake blocks with stable parameters of quality Part 2. Verification of modernized technology under real conditions


The presented article is the second in the series, which presents research related to the improvement of technology for producing brake blocks for the railway industry in the Spomel foundry in Lębork. The cooperation with the Foundry Research Ins...

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Influence of the structure index WB of the soluble sodium silicate on the residual strength of molding sand


Results of Rctk residual strength tests are presented for samples of moulding sands prepared with a stable content of soluble sodium silicate binding agents of different WB structure indicator values, hardened in the ester pr...

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Analysis of the sulphur content in moulding sands with furan resins


Among various sands with organic binders, moulding sands with furan resins belong to the group most widely applied in the manufacture of castings from ferrous alloys. This is due to a number of undisputable advantages offered by these sands, altho...

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Possibilities of waste binder reclamation using the example of moulding sands with water glass hardened by the conventional drying process


The article presents the results of preliminary studies on the possible application of innovative activation treatments of inorganic binders during the reclamation of waste water glass moulding sands hardened by conventional drying. The test mould...

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Choice of mould-making technology for the modified ablation casting process


The article presents the results of tests and studies carried out within the framework of statutory activities on various additives to moulding sands based on water-soluble inorganic binders for ablative knocking out of castings. As a result of te...

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Waste moulding sand as a substitute aggregate in the manufacture of autoclaved cellular concrete


The article presents the results of research on the possibilities of utilizing waste moulding sands with silicate and geopolymer binders in the production of autoclaved cellular concrete. The high content of silica in the waste moulding and core s...

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Aromatic compounds in waste gases formed during thermal decomposition of foundry binders


The paper presents the results of analysis of gases formed under the impact of high temperature acting on moulding sands with the addition of selected organic resins and hardeners, commonly used in foundries as binders for these sands. As a resear...

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Assessment of quartz wettability by the ecological foundry binder modified with nanoparticles of metal oxides


The results of studies of quartz wettability by an ecological foundry binder are presented. Water glass modified with nanoparticles of metal oxides, such as: MgO, Al2O3 and ZnO in organic solvents (methanol or propanol) was u...

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Comparison of parameters of the granulation process of dust waste from sand reclamation


The results of studies of the process of pressure-free granulation of foundry dust were described, including dust generated in the mechanical reclamation of waste bentonite sand (Dust 1), dust generated in the dry mechanical reclamation of waste s...

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The effect of wetting agent on the parameters of dry moulding silica sands bonded with sodium water glass


An attempt has been made to determine the effect of the addition of an agent wetting the surface of silica sand grains, introduced in order to increase the hardening efficiency of selected physical methods applied to the ecological foundry sands b...

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Studies of hardening kinetics of selected self-hardening masses at low temperatures


The article presents an analysis of the kinetics of the hardening process of self-hardening masses. In this study, moulding sand with a quartz sand grain matrix by Sibelco, main fraction Fm 0.40; 0.32; 0.20 mm, was used. Two resins were...

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Effect of a biodegradable addition as a binary binder component for cast moulding and core sands on the properties of the binder and the sands


The increasing requirements concerning the emission of hazardous substances force the casting industry to search for new, more environment-friendly solutions. Such solutions may include technologies of developing moulding and core sands with the u...

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The use of Py-GC/MS (pyrolysis/gas chromatography/mass spectroscopy) in the analysis of foundry binders: alkaline phenolic resol resin


The article presents the results of the pyrolysis of resin, the fast hardener as well as cured resin used in the ALPHASET technology. It is an alkaline phenolic resin of the resol type cured with an ester mixture. The pyrolysis was performed at 90...

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Analysis of the drying process of moistened surface layers of sand moulds and cores on the example of moulding sand with water glass


An analysis of the drying process of surface layers of sand moulds and cores (made of loose self-hardening moulding sand with hydrated sodium silicate hardened with a liquid ester hardener) which was previously subjected to the process of moisture...

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The role of the densification of moulding sands with inorganic binders in the modeling of their strength obtained after microwave hardening


The study attempts to complement the information on the effect of the density of moulding sands with inorganic binders on basic strength parameters, i.e. the tensile and bending strength of moulding sands with hydrated sodium silicate, after the p...

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Spectral study (FTIR, UV-Vis) of montmorillonite modified by ultrasound and potassium cations


This paper presented the spectral study (FTIR, UV-Vis) for samples of non-activated bentonite (calcium) which has in its composition a main mineral resource, montmorillonite (MMT). MMT, as a component which contains calcium ions (Ca-MMT, was modif...

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Structural studies (FTIR, DRIFT) of CMS-Na0.6 etherified starch for applications in moulding sands technology


Structural (FTIR) and thermo-analytic (DRIFT) studies were conducted on modified starch in the form of sodium salt of carboxymethyl starch (CMS-Na0.6) in the initial state, i.e. a colloidal solution, and in a cross-linked form prepared ...

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Effect of the way of modification of hydrated sodium silicate on the effectiveness of the changes in the residual strength of a moulding sand


The article discusses the ways of modification of hydrated sodium silicate as a silicate binder of moulding sands which were applied in the studies. It determines the change in the residual strength of the moulding sand with used silicate binders ...

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Surface analysis and chemical composition of dust from dry dedusting system of moulding sand with bentonite using scanning electron microscopy (SEM)


The article presents the results of surface morphology of dust from dry dedusting of moulding sand with bentonite and mixtures of bentonite with lustrous carbon carrier using scanning electron microscopy. The study identifies the approxi...

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