Your search for mould resulted in 77 matches...
The article presents the ecological aspects of the lost foam technology. The results of environmental tests carried out on an experimental stand for pouring of moulds with liquid metal and knocking out of castings ...
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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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The Inconel 740 type nickel alloy was melted in a vacuum, medium frequency induction furnace. During melting the inert gas (argon) atmosphere was used Metal was poured into a ceramic mould based on ethyl silicate. ...
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The article presents the developed research methodology that allows the evaluation of the kinetics of solidification and cooling of pattern material in a metal mould ( die). The apparatus was described and the resu...
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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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On the example of a street inlet casting, the metal flow in the gating system on entering the mould cavity and inside the mould was depicted. The effect of the technique by which the metal is fed into the mould cav...
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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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In the course of the executed project, a series of investigations has been made to establish what effect a refined inoculant applied on the mould surface can have on changes in the surface structure of castings mad...
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Using available thermo-physical parameters, the paper describes the simulation studies of metal flow in mould filled with an evaporative pattern. The final properties of casting made in a lost-foam process are grea...
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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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As expected, the increasing demand for magnesium alloy castings has already become a fact. Considering this situation, a rich program of the studies on this particular subject has been initiated and put into operat...
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In view of the documented pathogenic effect on human health of dust containing crystalline silica, an attempt has been made to identify different variations of polymorphic silica in samples of dust emitted from fou...
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The aim of this publication is to assess the effect of different types of the standard heat treatment on changes in mechanical properties at room temperature of magnesium alloy from AZ91 family referred to the same...
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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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The article presents the results of laboratory and industrial tests on the application of a new geopolymer Rudal A binder used in production of moulding and core sands for castings from carbon and alloyed cast stee...
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The article gives the results obtained in a fragment of the studies, carried out under a statutory activity, on optimising of the foundry sand technology with new modified inorganic binders, chemically bonded and C...
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The article is a compilation of the most important results obtained during execution of own research project regarding the possibility of using fly ash formed during combustion of hard coal as a base granular material ...
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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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One of the main parameters determining proper course of the pattern evaporation process, which takes place in parallel with pouring of the foundry mould with metal, are properties of the ceramic coating applied on a po...
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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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This paper presents the applicability of Bio Activ PH biopreparation in the treatment of toxic substances (phenol, formaldehyde) in selected types of waste mouldings and core laboratory scale. This method has not been used for this type of waste s...
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The article presents a method of modification of ceramic mould surface on the boundary between lost-wax model - ceramics by using a layer of nickel on a disposable model made of a specified type of polymer e.g. polymethyl methacrylate (PMMA) and t...
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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 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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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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Research was carried out on the technological properties of plaster mixtures developed at the Foundry Research Institute. Developed were mixtures of ceramic compounds in which the basic material was synthetic plaster. ...
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Research was carried out on the technological properties of plaster mixtures developed at the Foundry Research Institute. Developed were mixtures of ceramic compounds in which the basic material was synthetic plaster. ...
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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 article presents preliminary results of research on ablation casting technology. The guidelines for the design of equipment to carry out the process are described. Based on the above mentioned instructions a test stand was developed and built....
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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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Tests were conducted to develop a new generation of functional nano-coatings used in the foundry industry. The research focused on the introduction of modern and innovative coatings based on nanoparticles of cast elements and active chemical compo...
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This paper presents the method of investigating the sol-gel transition by constant speed removal of plates, made of suitable substrate, from an aqueous colloidal binder. The thickness of the deposited colloidal binder layer depends on the particle...
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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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This paper presents the results of work on the determination of actual molten metal flow in a mould during centrifugal casting in the SuperCast induction vacuum furnace manufactured by Linn HighTherm. The centrifugal casting process uses the effec...
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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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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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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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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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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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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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Computer programs are now a common tool aiding the engineer’s work on structure design. The design of foundry moulds used in the pressure die casting process, based on the casting design and effectively utilising the ability to create 3D ima...
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In the research part of this study, several types of materials were proposed, including ADI (Austempered Ductile Iron) subjected to four different types of heat treatment, using cast manganese steel and cast nickel-copper steel. The use of these m...
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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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An attempt was made to develop a mathematical model and apply this model in numerical analysis to the drying process of multi-layer ceramic moulds used in investment casting. The numerical analysis carried out in a FLOW-3D program was meant to ser...
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Stress measurements were taken on three castings made on the laboratory scale by different technologies from ledeburite alloy steel; the obtained results were subjected to a detailed analysis. The first casting was made by a conventional technique...
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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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The article discusses the thermal processes undergone by the sand mould in contact with the liquid casting alloy. Depending on the character of the atmosphere in the mould, this can be the process of combustion or pyrolysis (when there is no oxyge...
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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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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 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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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 die casting method is based on casting into permanent metal moulds, which makes it possible to obtain a large amount of casts with practically identical shapes. Compared to the technology of sand mould casting, this method has many advantages....
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Protective coatings are applied in order to obtain casts with an even surface, without faults. Protective coatings can contain a solvent based on water or alcohol; however, due to their harmfulness, it is recommended to limit the use of alcohol co...
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The study analyzes the effect of Ni and Cu additions on the mechanical properties of ADI cast iron in casts with different wall thickness values. The applied experiment plan included the use of combinations of the Ni addition in the amount of 0.5%...
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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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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 (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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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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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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During the project a technology of making ceramic moulds using aluminosilicate microspheres was developed. According to the developed technology, ceramic samples were used to determine thermal conductivity in the temperature range of 500°C to ...
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The present paper is relevant to the investigation of the interaction between the copper alloy metal matrix (CuZn38Pb2) and the reinforcement phase (Fe) during the production of "hybrid" complex relief MMCs. An innovative production method is used...
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Two different spheroidization methods were compared in terms of the effect they may have on gas content (oxygen, nitrogen and hydrogen) in ductile iron castings and process efficiency.Two methods of cast iron treatment were investigated, i.e...
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The article discusses the results of the studies of the effect of negative pressure in the mould and the casting system on the roughness of the casts’ surfaces. Roughness tests were performed on casts made of alloy EN AB 46000...
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This study presents selected issues regarding the process of obtaining ausferrite from spheroidal cast iron without the application of thermal treatment to the casts. An ausferritic matrix, as well as strong mechanical properties, also ensures hig...
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The aim of the work was to develop and model individual elements of casting technology for the casting of a ventilated brake disc using CAD program: SolidWorks, followed by printing a core using a 3D LS ONE printer from Sand Made Lt...
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This article presents selected research methods related to protective coatings used for sand moulds and cores in the foundry industry. The research methodology has been divided into studies of the technological properties of sand moulds and cores ...
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The aim of the presented study was to obtain the element of a crushing mill beater reinforced with a composite zone, working under the conditions of high abrasive wear as well as high pressures. By means of the SHSB method, a local composite zone ...
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The results of testing the tendency of light metals to forming defects from the group of discontinuities - hot cracks (W-301) [1], are presented in the hereby study. These are alloys of a small or moderate tendency for hot cracking. However this t...
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Investigation results of erosion-mechanical grinding (wearing) of surfaces of foundry patterns (test samples) made of several kinds of materials are presented in the hereby paper. Investigations contained: resins, wood, painted ...
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The article raises the issue of the influence of increased temperature on olivine moulding and core sands with an inorganic binder from the group of unmodified kinds of hydrated sodium silicates. Produced at laboratory conditions,&n...
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The increasing requirements of casting users regarding the dimensional accuracy and surface roughness of castings force the manufacturers, i.e. foundries, to use protective coatings on moulds and cores. Coatings are applied in ...
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In this paper an attempt was made to explain the phenomena accompanying the formation and destruction of bonded elements of moulds and cores in which a mixture of unmodified hydrated sodium silicate with a molar module of 2.9 (...
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The paper presents laboratory test results for an assessment of the binding characteristics of two grades of calcium bentonite compounds for casting moulds. The bentonite compounds were chemically modified with sodium carbonate at several differen...
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Ductile iron castings are widely used in many industrial branches because of their mechanical properties. The production process of such a grade of cast iron requires the maintenance of the technological regime and the purity of initial charge mat...
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This study presents the possibility of using x-ray computed tomography (CT) for the technological quality assessment of multi-layer ceramic moulds used in the precision casting process. Testing concepts were presented with regard to the detection ...
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Testing the properties of mould and core sands are specified in the norms and standards, which are used to determine the suitability of the sand for specific applications. However, the testing of protective coatings for moulding&nbs...
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The paper presents an attempt to assess the mechanical properties of high-strength AlZnMgCu aluminium alloy samples cast in gypsum moulds. The first stage of the study involved the use of computer simulations to select the opti...
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