Abstract The results of own studies concerning the application a new additive to CO 2 -hardened sodium water glass foundry sands are presented. additive, which is composition aqueous solutions modified polyalcohols, has been designated by symbol “B” and used as an agent improving sand knocking out properties. scope included various mechanical technological properties mixtures, such permeability, friability, life cycle cores Two types with different values silica modulus density, R145 R150,...

Abstract The results of research on the possibility using a gaseous medium (hot air) as hardening agent for inorganic binders were discussed, and tests reclamation waste moulding sands carried out. programme also included use modernized test stand foundry with agents pilot plant sand reclamation. Cores made examined basic technological properties used in moulds trial knocking out castings. Two types tested, i.e. modified water glass designated Binder A and, comparison, reference material...

Abstract This paper presents the results of research which is part studies carried out under project POIG.01.01.02-00-015/09 "Advanced Materials and Technologies", one aims to introduce new, environment-friendly, inorganic binders production castings from non-ferrous metals. The on management waste moulding sands prepared according new technology, including their multiple reclamation post-reclamation waste. Studies are a continuation preliminary described earlier. programme in this also...

The essence of ablation casting technology consists in pouring castings single-use moulds made from the mixture sand and a watersoluble binder.After mould with liquid metal, while is still solidifying, destruction (washing out, erosion) takes place using stream cooling medium, which this case water.This paper focuses on selection moulding sands hydrated sodium silicate for used casting.The research based use Cordis binder produced by Hüttenes-Albertus Company.It new-generation inorganic...

Abstract A method for the chemical modification of silicate binder (hydrated sodium silicate) affecting distribution its nanostructure elements was disclosed. The effect on resulting technological properties moulding sands, determined under standard conditions and at elevated temperatures in range from 100 0 C to 900 C, discussed. Modification this type is done inorganic binders order reduce their unfavourable functional properties. It particularly important when sands with are used casting...

Successful casting demands that during pouring of the foundry mould with molten metal cavity suffers no deformation.This, in turn, use binding materials can give base sand adequate strength.The main bonding are clay binders.The industry uses minerals rich clay, such as kaolinite, halloysite, hydromica, montmorillonite, polygorskite, vermiculite and allophane.Due to their capacity, montmorillonites most interesting all plastic rocks.The basic rock containing used a common material for...

One of the purposes application chemically modified inorganic binders is to improve knocking out properties and related reclamability with previously used in foundry binder (water glass), which allowing use ecological for casting nonferrous metals.Good sands directly waste reclamability, a necessary condition effective management.Reclamation moulding core fundamental way manage on site at foundry, accordance Environmental Guidelines.Therefore, studies reclamation new types (developed within...

Abstract One of the factors that contribute to development foundry moulding technology is environmental protection. The related challenges are effectively satisfied by a new inorganic binder has been designed for castings made non-ferrous metal alloys. This article presents in concise way test results, showing ecological character at stage making moulds, pouring them with and cooling castings, indicating possibilities an economic re-use waste materials formed during practical application...

Bentonites and clays are included in the group of drilling fluids materials.The raw materials mainly clay minerals, which divided into several groups, like montmorillonite, kaolinite, illite, biotite, muscovite, nontronite, anorthoclase, microcline, sanidine or rutile, differing chemical composition crystal lattice structure.Clay minerals have a layered structure forming sheet units.The layers merge sheets that build up to form mineral.The aim studies carried out ŁUKASIEWICZ Research Network...

The ablation casting technology consists in pouring castings single-use moulds made from the mixture of sand and watersoluble binder.After mould with liquid metal is destructed (washed out) using a stream cooling medium, which this case water.The process takes place while still solidifying.The following paper focuses on testing influence modified aluminum alloy casts properties produced hydrated sodium silicate binder.The authors showed that best kind moulding sands for Al will be those...

The aim of this study is to demonstrate the possibility using moulding sands based on inorganic binders hardened in a microwave chamber technology ablation casting aluminium alloys.The essence consists that mould with water-soluble binder continuously washed water immediately after being poured liquid alloy until its complete erosion takes place.The application an environmentally friendly improves ecology whole process, while hardening allows moulds be made from sand mixture containing only...

The foundry industry in Poland and EU member states is growing steadily.The alloys based on ferrous metals (cast steel cast iron) largely contribute to this upward trend.Currently, foundries are facing the problem of increasing requirements, which enforce production castings characterized by high dimensional accuracy surface smoothness with parallel elimination casting defects.Castings mostly made moulding sand mixtures, also subject more stringent requirements meet above-mentioned...

The aim of this study is to demonstrate the possibility using moulds made from environmentally friendly sands with hydrated sodium silicate in modified ablation casting.The casting technology primarily intended for castings diversified wall thickness and complex shapes sand moulds.The article presents effect binder content hardening time on bending strength R g u moulding binders based hardened by microwave technology.The research was develop an optimal composition that would provide...

The results of mechanical reclamation waste moulding sands with furfuryl resin and activators new generation are presented.The aim the research described in this study was to determine what effect addition reclaim obtained process dry could have on properties furan sands.The sand supplied by one domestic foundries after initial subjected a two-step proper process.The following tests were carried out reclaim: pH, S N content, loss ignition comprehensive sieve analysis.The next used as...

The aim of the present work is to compare properties self-hardening moulding sands based on inorganic binders sodium silicate different modules, geopolymer and phosphate prove they can be used in ablation casting process. Ablation a process which, directly after pouring liquid alloy, mould sprayed with water until it completely eroded finished, cooled obtained. use proecological water-dilutable binder makes possible recover sand matrix drying suspension that remains Moulding were prepared...

Abstract Green moulding sands containing special carbonaceous additives, which are the source of lustrous carbon (LC), discussed in this paper. Five potential carriers, i.e., two types hard coal dust (No.1 and No.2), amorphous graphite (No.3) hydrocarbon resins (No.4 No.5), were selected for tests as additives to conventional sands. To better emphasize differences used, reference green sand (GMS1) was prepared subjected a wide range basic focussed on technological parameters, such...

Ablation casting is a technological process in which the increased cooling rate causes microstructure refinement, resulting improved mechanical properties of final product.This technology particularly suitable for manufacture castings with intricate shapes and thin walls.Currently, ablation not used Polish industry.This article presents results strength tests carried out on moulding sands based hydrated sodium silicate hardened Floster S technology, intended AlSi7Mg (AK7) aluminium...

The results of testing the strength properties experimental ceramic materials containing spending moulding sand after initial mechanical reclamation as a material for subsequent layers stucco composition were presented.Tests carried out on spent sands from various foundry technologies, i.e. with furfuryl resin and hydrated sodium silicate.The spent, agglomerated has undergone crushing process.Next, required granular fractions used individual separated.Ceramic samples, in which was substitute...

Abstract The aim of the study was to determine applicability a new product added water glass-containing foundry sands hardened with ethylene glycol diacetate. additive designated by symbol “B” is composition aqueous solutions modified polyalcohols, improving sand knocking out properties. scope studies included testing various mechanical and technological properties mixtures, such as permeability, friability, life cycle cores In studies, two types glass different values silica modulus...

The aim of the study was to select optimal content zirconium introduced as an alloying additive obtain best strength properties Al-Si alloy.A technically important disadvantage is tendency silumins form a coarse-grained structure that adversely affects mechanical castings.To improve structure, modification processes and additives are used, both which can effectively refine thus increase properties.According Hall-Petch relationship, finer higher alloy.The proposed addition element has...

Increasing demands are imposed on foundries to enforce the manufacture of castings characterized by tight dimensional tolerances, high surface finish and total absence casting defects.To face these challenges, increasingly made in loose self-hardening sands with furfuryl resin, commonly known as furan sands.In group synthetic resins, resin enjoy greatest popularity.The sand mixtures based resins usually subjected mechanical reclamation.The consumption binder hardener thus cost depend quality...